niceSOFT/python3-pyOpenSSL: A Python wrapper around the OpenSSL library

tests/test_crypto.py
3 966 строк148 KB
Alex Gaynor
Bump version for 24.1.0 release (#1297)
10 мар 2024, 02:14
10 мар 2024, 02:14d9f2c46
# Copyright (c) Jean-Paul Calderone
# See LICENSE file for details.

"""
Unit tests for :py:mod:`OpenSSL.crypto`.
"""

import base64
import sys
import warnings
from datetime import datetime, timedelta, timezone
from subprocess import PIPE, Popen

import pytest
from cryptography import x509
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric import ec, ed448, ed25519, rsa

from OpenSSL._util import ffi as _ffi
from OpenSSL._util import lib as _lib
from OpenSSL.crypto import (
    FILETYPE_ASN1,
    FILETYPE_PEM,
    FILETYPE_TEXT,
    TYPE_DSA,
    TYPE_RSA,
    X509,
    Error,
    PKey,
    X509Name,
    X509Req,
    X509Store,
    X509StoreContext,
    X509StoreContextError,
    X509StoreFlags,
    dump_certificate,
    dump_certificate_request,
    dump_privatekey,
    dump_publickey,
    get_elliptic_curve,
    get_elliptic_curves,
    load_certificate,
    load_certificate_request,
    load_privatekey,
    load_publickey,
    sign,
    verify,
)

with pytest.warns(DeprecationWarning):
    from OpenSSL.crypto import (
        CRL,
        Revoked,
        X509Extension,
        dump_crl,
        load_crl,
    )

from .util import (
    NON_ASCII,
    WARNING_TYPE_EXPECTED,
    EqualityTestsMixin,
    is_consistent_type,
)


def normalize_privatekey_pem(pem):
    return dump_privatekey(FILETYPE_PEM, load_privatekey(FILETYPE_PEM, pem))


def utcnow():
    return datetime.now(timezone.utc).replace(tzinfo=None)


GOOD_CIPHER = "blowfish"
BAD_CIPHER = "zippers"

GOOD_DIGEST = "SHA256"
BAD_DIGEST = "monkeys"

old_root_cert_pem = b"""-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
"""

root_cert_pem = b"""-----BEGIN CERTIFICATE-----
MIIE7jCCA1agAwIBAgIIPQzE4MbeufQwDQYJKoZIhvcNAQELBQAwWDELMAkGA1UE
BhMCVVMxCzAJBgNVBAgTAklMMRAwDgYDVQQHEwdDaGljYWdvMRAwDgYDVQQKEwdU
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J7Ci2KTRJ3SYMgTNU6MNcl7b9Tpw9/KVG80IbpzNQ1LDh3ZtkOfqoou1lmBTeNPu
g2C/oiW6lVAmZx1TL9gbUtkJ0Q2iW4D9TF+zuYi2qpbVU3RvoqK25x3AuIWf4JOL
3cTNjJ/3zmGSORRJvcGyvVnL30R+vwpaxvyuqMjz3kBjkK2Z2pvElZMJiZhbGG7k
MHZQ5A26v0/iQVno6FRv3cQb9EeAZtNHcIEgsNhPZ53XVnwZ58ByvATMLKNN8dWF
Q+8Bbr7QFxeWvQfHYX2yaQZ/
-----END CERTIFICATE-----
"""

root_key_pem = b"""-----BEGIN RSA PRIVATE KEY-----
MIIG5AIBAAKCAYEAuljmNv5LsBRvH2DM3TrCSpR5v540tOMI4qh+IxOfxjROoIDZ
nJjdcxw0ExohLuF0VOCaaq18We1ihvEsCX+3B9vP0CdFpUOHYfJS8e8wHEqfUdIM
sAsu2p0XSlxciM/ThLs0o9BSaCS/YfQrBxSliWCNMW1dGI/7vANKJB4/VhVKuISg
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Mgmxz/OdiyppG8KRAgMBAAECggGAGi6Tafagu8SjOE1pe0veMIxb7shTr3aWsQHr
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bKZNHgrngs2zk5qCYRllmsBZ3obdufnP/wyag+BFVniAIN3a08y46SYmgYTeLdBX
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SsPYeYlPDCCvyJYGpR19QocYp6JCaemb7uMd6FuPHSHUgyoR4GS8PUuIbiRnpPxN
4ta7VzmIZOCFu5e+vOq1NwTd0hR6sy5uNsTHV5ezOOqz2SB+yTRMDPr7cW0dMSJ8
jsvxvqVnkIhWeuP9GIb6XUhq74huGZ0Hpaxe6xG34QYiBpr/O3O/ew==
-----END RSA PRIVATE KEY-----
"""

root_key_der = base64.b64decode(
    """
MIIG5AIBAAKCAYEAuljmNv5LsBRvH2DM3TrCSpR5v540tOMI4qh+IxOfxjROoIDZ
nJjdcxw0ExohLuF0VOCaaq18We1ihvEsCX+3B9vP0CdFpUOHYfJS8e8wHEqfUdIM
sAsu2p0XSlxciM/ThLs0o9BSaCS/YfQrBxSliWCNMW1dGI/7vANKJB4/VhVKuISg
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jsvxvqVnkIhWeuP9GIb6XUhq74huGZ0Hpaxe6xG34QYiBpr/O3O/ew=='
"""
)

normalized_root_key_pem = normalize_privatekey_pem(root_key_pem)

intermediate_cert_pem = b"""-----BEGIN CERTIFICATE-----
MIIEXDCCAsSgAwIBAgIRAMPzhm6//0Y/g2pmnHR2C4cwDQYJKoZIhvcNAQELBQAw
WDELMAkGA1UEBhMCVVMxCzAJBgNVBAgTAklMMRAwDgYDVQQHEwdDaGljYWdvMRAw
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gYUFRVpkNDrC/c9u6WgA943yMgFCwjrlTsmi+uoweT9U5r4TA+dVCDAv943aWCNm
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neyFR2Oc/nUlZMKfyHI+pA==
-----END CERTIFICATE-----
"""

intermediate_key_pem = b"""-----BEGIN RSA PRIVATE KEY-----
MIIG4gIBAAKCAYEAo3rOxOVrdLdRsR1o0+JG7MRpCtMoafA63TM/DczLQ4jURv5M
zyTE7FFdXq4xNJRYgD16vUavZluQGj30+5Lkt07CuO/BK3itl8UW+dsHp95gzBvg
nj5AVZGkNOQ0Y4CbXO087Ywep7tpBfZ5fzURLeH+OHQGseEFZ5e0w8AzAarWu+Ez
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ns4k3G9I+Qgxmpa5AgMBAAECggGAc0i/V4qR5JUCPuyGaCVB7uXzTXbrIQoP+L2S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-----END RSA PRIVATE KEY-----
"""

server_cert_pem = b"""-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
"""

server_key_pem = normalize_privatekey_pem(
    b"""-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
"""
)

intermediate_server_cert_pem = b"""-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
"""

intermediate_server_key_pem = b"""-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
"""

client_cert_pem = b"""-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
"""

client_key_pem = normalize_privatekey_pem(
    b"""-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
"""
)

cleartextCertificateRequestPEM = b"""-----BEGIN CERTIFICATE REQUEST-----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-----END CERTIFICATE REQUEST-----
"""

encryptedPrivateKeyPEM = b"""-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9573604A18579E9E
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-----END RSA PRIVATE KEY-----
"""

encryptedPrivateKeyPEMPassphrase = b"foobar"

cleartextPrivateKeyPEM = """-----BEGIN PRIVATE KEY-----
MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBAMcRMugJ4kvkOEuT
AvMFr9+3A6+HAB6nKYcXXZz93ube8rJpBZQEfWn73H10dQiQR/a+rhxYEeLy8dPc
UkFcGR9miVkukJ59zex7iySJY76bdBD8gyx1LTKrkCstP2XHKEYqgbj+tm7VzJnY
sQLqoaa5NeyWJnUC3MJympkAS7p3AgMBAAECgYAoBAcNqd75jnjaiETRgVUnTWzK
PgMCJmwsob/JrSa/lhWHU6Exbe2f/mcGOQDFpesxaIcrX3DJBDkkc2d9h/vsfo5v
JLk/rbHoItWxwuY5n5raAPeQPToKpTDxDrL6Ejhgcxd19wNht7/XSrYZ+dq3iU6G
mOEvU2hrnfIW3kwVYQJBAP62G6R0gucNfaKGtHzfR3TN9G/DnCItchF+TxGTtpdh
Cz32MG+7pirT/0xunekmUIp15QHdRy496sVxWTCooLkCQQDIEwXTAwhLNRGFEs5S
jSkxNfTVeNiOzlG8jPBJJDAdlLt1gUqjZWnk9yU+itMSGi/6eeuH2n04FFk+SV/T
7ryvAkB0y0ZDk5VOozX/p2rtc2iNm77A3N4kIdiTQuq4sZXhNgN0pwWwxke8jbcb
8gEAnqwBwWt//locTxHu9TmjgT8pAkEAlbF16B0atXptM02QxT8MlN8z4gxaqu4/
RX2FwpOq1FcVsqMbvwj/o+ouGY8wwRiK0TMrQCf/DFhdNTcc1aqHzQJBAKWtq4LI
uVZjCAuyrqEnt7R1bOiLrar+/ezJPY2z+f2rb1TGr31ztPeFvO3edLw+QdhzwJGp
QKImYzqMe+zkIOQ=
-----END PRIVATE KEY-----
"""

cleartextPublicKeyPEM = b"""-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxszlc+b71LvlLS0ypt/l
gT/JzSVJtnEqw9WUNGeiChywX2mmQLHEt7KP0JikqUFZOtPclNY823Q4pErMTSWC
90qlUxI47vNJbXGRfmO2q6Zfw6SE+E9iUb74xezbOJLjBuUIkQzEKEFV+8taiRV+
ceg1v01yCT2+OjhQW3cxG42zxyRFmqesbQAUWgS3uhPrUQqYQUEiTmVhh4FBUKZ5
XIneGUpX1S7mXRxTLH6YzRoGFqRoc9A0BBNcoXHTWnxV215k4TeHMFYE5RG0KYAS
8Xk5iKICEXwnZreIt3jyygqoOKsKZMK/Zl2VhMGhJR6HXRpQCyASzEG7bgtROLhL
ywIDAQAB
-----END PUBLIC KEY-----
"""

crlData = b"""\
-----BEGIN X509 CRL-----
MIIBWzCBxTANBgkqhkiG9w0BAQQFADBYMQswCQYDVQQGEwJVUzELMAkGA1UECBMC
SUwxEDAOBgNVBAcTB0NoaWNhZ28xEDAOBgNVBAoTB1Rlc3RpbmcxGDAWBgNVBAMT
D1Rlc3RpbmcgUm9vdCBDQRcNMDkwNzI2MDQzNDU2WhcNMTIwOTI3MDI0MTUyWjA8
MBUCAgOrGA8yMDA5MDcyNTIzMzQ1NlowIwICAQAYDzIwMDkwNzI1MjMzNDU2WjAM
MAoGA1UdFQQDCgEEMA0GCSqGSIb3DQEBBAUAA4GBAEBt7xTs2htdD3d4ErrcGAw1
4dKcVnIWTutoI7xxen26Wwvh8VCsT7i/UeP+rBl9rC/kfjWjzQk3/zleaarGTpBT
0yp4HXRFFoRhhSE/hP+eteaPXRgrsNRLHe9ZDd69wmh7J1wMDb0m81RG7kqcbsid
vrzEeLDRiiPl92dyyWmu
-----END X509 CRL-----
"""

# The signature on this CRL is invalid.
crlDataUnsupportedExtension = b"""\
-----BEGIN X509 CRL-----
MIIGRzCCBS8CAQEwDQYJKoZIhvcNAQELBQAwJzELMAkGA1UEBhMCVVMxGDAWBgNV
BAMMD2NyeXB0b2dyYXBoeS5pbxgPMjAxNTAxMDEwMDAwMDBaGA8yMDE2MDEwMTAw
MDAwMFowggTOMBQCAQAYDzIwMTUwMTAxMDAwMDAwWjByAgEBGA8yMDE1MDEwMTAw
MDAwMFowXDAYBgNVHRgEERgPMjAxNTAxMDEwMDAwMDBaMDQGA1UdHQQtMCukKTAn
MQswCQYDVQQGEwJVUzEYMBYGA1UEAwwPY3J5cHRvZ3JhcGh5LmlvMAoGA1UdFQQD
CgEAMHICAQIYDzIwMTUwMTAxMDAwMDAwWjBcMBgGA1UdGAQRGA8yMDE1MDEwMTAw
MDAwMFowNAYDVR0dBC0wK6QpMCcxCzAJBgNVBAYTAlVTMRgwFgYDVQQDDA9jcnlw
dG9ncmFwaHkuaW8wCgYDVR0VBAMKAQEwcgIBAxgPMjAxNTAxMDEwMDAwMDBaMFww
GAYDVR0YBBEYDzIwMTUwMTAxMDAwMDAwWjA0BgNVHR0ELTArpCkwJzELMAkGA1UE
BhMCVVMxGDAWBgNVBAMMD2NyeXB0b2dyYXBoeS5pbzAKBgNVHRUEAwoBAjByAgEE
GA8yMDE1MDEwMTAwMDAwMFowXDAYBgNVHRgEERgPMjAxNTAxMDEwMDAwMDBaMDQG
A1UdHQQtMCukKTAnMQswCQYDVQQGEwJVUzEYMBYGA1UEAwwPY3J5cHRvZ3JhcGh5
LmlvMAoGA1UdFQQDCgEDMHICAQUYDzIwMTUwMTAxMDAwMDAwWjBcMBgGA1UdGAQR
GA8yMDE1MDEwMTAwMDAwMFowNAYDVR0dBC0wK6QpMCcxCzAJBgNVBAYTAlVTMRgw
FgYDVQQDDA9jcnlwdG9ncmFwaHkuaW8wCgYDVR0VBAMKAQQwcgIBBhgPMjAxNTAx
MDEwMDAwMDBaMFwwGAYDVR0YBBEYDzIwMTUwMTAxMDAwMDAwWjA0BgNVHR0ELTAr
pCkwJzELMAkGA1UEBhMCVVMxGDAWBgNVBAMMD2NyeXB0b2dyYXBoeS5pbzAKBgNV
HRUEAwoBBTByAgEHGA8yMDE1MDEwMTAwMDAwMFowXDAYBgNVHRgEERgPMjAxNTAx
MDEwMDAwMDBaMDQGA1UdHQQtMCukKTAnMQswCQYDVQQGEwJVUzEYMBYGA1UEAwwP
Y3J5cHRvZ3JhcGh5LmlvMAoGA1UdFQQDCgEGMHICAQgYDzIwMTUwMTAxMDAwMDAw
WjBcMBgGA1UdGAQRGA8yMDE1MDEwMTAwMDAwMFowNAYDVR0dBC0wK6QpMCcxCzAJ
BgNVBAYTAlVTMRgwFgYDVQQDDA9jcnlwdG9ncmFwaHkuaW8wCgYDVR0VBAMKAQgw
cgIBCRgPMjAxNTAxMDEwMDAwMDBaMFwwGAYDVR0YBBEYDzIwMTUwMTAxMDAwMDAw
WjA0BgNVHR0ELTArpCkwJzELMAkGA1UEBhMCVVMxGDAWBgNVBAMMD2NyeXB0b2dy
YXBoeS5pbzAKBgNVHRUEAwoBCTByAgEKGA8yMDE1MDEwMTAwMDAwMFowXDAYBgNV
HRgEERgPMjAxNTAxMDEwMDAwMDBaMDQGA1UdHQQtMCukKTAnMQswCQYDVQQGEwJV
UzEYMBYGA1UEAwwPY3J5cHRvZ3JhcGh5LmlvMAoGA1UdFQQDCgEKMC4CAQsYDzIw
MTUwMTAxMDAwMDAwWjAYMAoGA1UdFQQDCgEBMAoGAyoDBAQDCgEAMA0GCSqGSIb3
DQEBCwUAA4IBAQBTaloHlPaCZzYee8LxkWej5meiqxQVNWFoVdjesroa+f1FRrH+
drRU60Nq97KCKf7f9GNN/J3ZIlQmYhmuDqh12f+XLpotoj1ZRfBz2hjFCkJlv+2c
oWWGNHgA70ndFoVtcmX088SYpX8E3ARATivS4q2h9WlwV6rO93mhg3HGIe3JpcK4
7BcW6Poi/ut/zsDOkVbI00SqaujRpdmdCTht82MH3ztjyDkI9KYaD/YEweKSrWOz
SdEILd164bfBeLuplVI+xpmTEMVNpXBlSXl7+xIw9Vk7p7Q1Pa3k/SvhOldYCm6y
C1xAg/AAq6w78yzYt18j5Mj0s6eeHi1YpHKw
-----END X509 CRL-----
"""


# A broken RSA private key which can be used to test the error path through
# PKey.check.
inconsistentPrivateKeyPEM = b"""-----BEGIN RSA PRIVATE KEY-----
MIIBPAIBAAJBAKy+e3dulvXzV7zoTZWc5TzgApr8DmeQHTYC8ydfzH7EECe4R1Xh
5kwIzOuuFfn178FBiS84gngaNcrFi0Z5fAkCAwEaAQJBAIqm/bz4NA1H++Vx5Ewx
OcKp3w19QSaZAwlGRtsUxrP7436QjnREM3Bm8ygU11BjkPVmtrKm6AayQfCHqJoT
zIECIQDW0BoMoL0HOYM/mrTLhaykYAVqgIeJsPjvkEhTFXWBuQIhAM3deFAvWNu4
nklUQ37XsCT2c9tmNt1LAT+slG2JOTTRAiAuXDtC/m3NYVwyHfFm+zKHRzHkClk2
HjubeEgjpj32AQIhAJqMGTaZVOwevTXvvHwNeH+vRWsAYU/gbx+OQB+7VOcBAiEA
oolb6NMg/R3enNPvS1O4UU1H8wpaF77L4yiSWlE0p4w=
-----END RSA PRIVATE KEY-----
"""

# certificate with NULL bytes in subjectAltName and common name

nulbyteSubjectAltNamePEM = b"""-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----"""

large_key_pem = b"""-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----"""

ec_private_key_pem = b"""-----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgYirTZSx+5O8Y6tlG
cka6W6btJiocdrdolfcukSoTEk+hRANCAAQkvPNu7Pa1GcsWU4v7ptNfqCJVq8Cx
zo0MUVPQgwJ3aJtNM1QMOQUayCrRwfklg+D/rFSUwEUqtZh7fJDiFqz3
-----END PRIVATE KEY-----
"""

ec_root_key_pem = b"""-----BEGIN EC PRIVATE KEY-----
MIGlAgEBBDEAz/HOBFPYLB0jLWeTpJn4Yc4m/C4mdWymVHBjOmnwiPHKT326iYN/
ZhmSs+RM94RsoAcGBSuBBAAioWQDYgAEwE5vDdla/nLpWAPAQ0yFGqwLuw4BcN2r
U+sKab5EAEHzLeceRa8ffncYdCXNoVsBcdob1y66CFZMEWLetPTmGapyWkBAs6/L
8kUlkU9OsE+7IVo4QQJkgV5gM+Dim1XE
-----END EC PRIVATE KEY-----
"""

ec_root_cert_pem = b"""-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----"""

rsa_p_not_prime_pem = """
-----BEGIN RSA PRIVATE KEY-----
MBsCAQACAS0CAQcCAQACAQ8CAQMCAQACAQACAQA=
-----END RSA PRIVATE KEY-----
"""

ed25519_private_key_pem = b"""-----BEGIN PRIVATE KEY-----
MC4CAQAwBQYDK2VwBCIEIKlxBbhVsSURoLTmsu9uTqYH6oF7zpxmp1ZQCAPhDmI2
-----END PRIVATE KEY-----
"""

ed448_private_key_pem = b"""-----BEGIN PRIVATE KEY-----
MEcCAQAwBQYDK2VxBDsEOcqZ7a3k6JwrJbYO8CNTPT/d7dlWCo5vCf0EYDj79ZvA\nhD8u9EPHlYJw5Y8ZQdH4WmVEfpKA23xkdQ==
-----END PRIVATE KEY-----
"""

x25519_private_key_pem = b"""-----BEGIN PRIVATE KEY-----
MC4CAQAwBQYDK2VuBCIEIPAjVfPNTm25VxtBRg+JjjFx9tA3M8aaBdVhjb92iBts
-----END PRIVATE KEY-----
"""


@pytest.fixture
def x509_data():
    """
    Create a new private key and start a certificate request (for a test
    to finish in one way or another).
    """
    # Basic setup stuff to generate a certificate
    pkey = PKey()
    pkey.generate_key(TYPE_RSA, 2048)
    req = X509Req()
    req.set_pubkey(pkey)
    # Authority good you have.
    req.get_subject().commonName = "Yoda root CA"
    x509 = X509()
    subject = x509.get_subject()
    subject.commonName = req.get_subject().commonName
    x509.set_issuer(subject)
    x509.set_pubkey(pkey)
    now = datetime.now()
    expire = datetime.now() + timedelta(days=100)
    x509.set_notBefore(now.strftime("%Y%m%d%H%M%SZ").encode())
    x509.set_notAfter(expire.strftime("%Y%m%d%H%M%SZ").encode())
    yield pkey, x509


class TestX509Ext:
    """
    Tests for `OpenSSL.crypto.X509Extension`.
    """

    def test_str(self):
        """
        The string representation of `X509Extension` instances as
        returned by `str` includes stuff.
        """
        # This isn't necessarily the best string representation.  Perhaps it
        # will be changed/improved in the future.
        assert (
            str(X509Extension(b"basicConstraints", True, b"CA:false"))
            == "CA:FALSE"
        )

    def test_type(self):
        """
        `X509Extension` can be used to create instances of that type.
        """
        assert is_consistent_type(
            X509Extension,
            "X509Extension",
            b"basicConstraints",
            True,
            b"CA:true",
        )

    def test_construction(self):
        """
        `X509Extension` accepts an extension type name, a critical flag,
        and an extension value and returns an `X509Extension` instance.
        """
        basic = X509Extension(b"basicConstraints", True, b"CA:true")
        assert isinstance(basic, X509Extension)

        comment = X509Extension(b"nsComment", False, b"pyOpenSSL unit test")
        assert isinstance(comment, X509Extension)

    @pytest.mark.parametrize(
        "type_name, critical, value",
        [
            (b"thisIsMadeUp", False, b"hi"),
            (b"basicConstraints", False, b"blah blah"),
            # Exercise a weird one (an extension which uses the r2i method).
            # This exercises the codepath that requires a non-NULL ctx to be
            # passed to X509V3_EXT_nconf. It can't work now because we provide
            # no configuration database. It might be made to work in the
            # future.
            (
                b"proxyCertInfo",
                True,
                b"language:id-ppl-anyLanguage,pathlen:1,policy:text:AB",
            ),
        ],
    )
    def test_invalid_extension(self, type_name, critical, value):
        """
        `X509Extension` raises something if it is passed a bad
        extension name or value.
        """
        with pytest.raises(Error):
            X509Extension(type_name, critical, value)

    @pytest.mark.parametrize("critical_flag", [True, False])
    def test_get_critical(self, critical_flag):
        """
        `X509ExtensionType.get_critical` returns the value of the
        extension's critical flag.
        """
        ext = X509Extension(b"basicConstraints", critical_flag, b"CA:true")
        assert ext.get_critical() == critical_flag

    @pytest.mark.parametrize(
        "short_name, value",
        [(b"basicConstraints", b"CA:true"), (b"nsComment", b"foo bar")],
    )
    def test_get_short_name(self, short_name, value):
        """
        `X509ExtensionType.get_short_name` returns a string giving the
        short type name of the extension.
        """
        ext = X509Extension(short_name, True, value)
        assert ext.get_short_name() == short_name

    def test_get_data(self):
        """
        `X509Extension.get_data` returns a string giving the data of
        the extension.
        """
        ext = X509Extension(b"basicConstraints", True, b"CA:true")
        # Expect to get back the DER encoded form of CA:true.
        assert ext.get_data() == b"0\x03\x01\x01\xff"

    def test_unused_subject(self, x509_data):
        """
        The `subject` parameter to `X509Extension` may be provided for an
        extension which does not use it and is ignored in this case.
        """
        pkey, x509 = x509_data
        ext1 = X509Extension(
            b"basicConstraints", False, b"CA:TRUE", subject=x509
        )
        x509.add_extensions([ext1])
        x509.sign(pkey, "sha256")
        # This is a little lame.  Can we think of a better way?
        text = dump_certificate(FILETYPE_TEXT, x509)
        assert b"X509v3 Basic Constraints:" in text
        assert b"CA:TRUE" in text

    def test_subject(self, x509_data):
        """
        If an extension requires a subject, the `subject` parameter to
        `X509Extension` provides its value.
        """
        pkey, x509 = x509_data
        ext3 = X509Extension(
            b"subjectKeyIdentifier", False, b"hash", subject=x509
        )
        x509.add_extensions([ext3])
        x509.sign(pkey, "sha256")
        text = dump_certificate(FILETYPE_TEXT, x509)
        assert b"X509v3 Subject Key Identifier:" in text

    def test_missing_subject(self):
        """
        If an extension requires a subject and the `subject` parameter
        is given no value, something happens.
        """
        with pytest.raises(Error):
            X509Extension(b"subjectKeyIdentifier", False, b"hash")

    @pytest.mark.parametrize("bad_obj", [True, object(), "hello", []])
    def test_invalid_subject(self, bad_obj):
        """
        If the `subject` parameter is given a value which is not an
        `X509` instance, `TypeError` is raised.
        """
        with pytest.raises(TypeError):
            X509Extension(
                "basicConstraints", False, "CA:TRUE", subject=bad_obj
            )

    def test_unused_issuer(self, x509_data):
        """
        The `issuer` parameter to `X509Extension` may be provided for an
        extension which does not use it and is ignored in this case.
        """
        pkey, x509 = x509_data
        ext1 = X509Extension(
            b"basicConstraints", False, b"CA:TRUE", issuer=x509
        )
        x509.add_extensions([ext1])
        x509.sign(pkey, "sha256")
        text = dump_certificate(FILETYPE_TEXT, x509)
        assert b"X509v3 Basic Constraints:" in text
        assert b"CA:TRUE" in text

    def test_issuer(self, x509_data):
        """
        If an extension requires an issuer, the `issuer` parameter to
        `X509Extension` provides its value.
        """
        pkey, x509 = x509_data
        ext2 = X509Extension(
            b"authorityKeyIdentifier", False, b"issuer:always", issuer=x509
        )
        x509.add_extensions([ext2])
        x509.sign(pkey, "sha256")
        text = dump_certificate(FILETYPE_TEXT, x509)
        assert b"X509v3 Authority Key Identifier:" in text
        assert b"DirName:/CN=Yoda root CA" in text

    def test_missing_issuer(self):
        """
        If an extension requires an issue and the `issuer` parameter is
        given no value, something happens.
        """
        with pytest.raises(Error):
            X509Extension(
                b"authorityKeyIdentifier", False, b"keyid:always,issuer:always"
            )

    @pytest.mark.parametrize("bad_obj", [True, object(), "hello", []])
    def test_invalid_issuer(self, bad_obj):
        """
        If the `issuer` parameter is given a value which is not an
        `X509` instance, `TypeError` is raised.
        """
        with pytest.raises(TypeError):
            X509Extension(
                "basicConstraints",
                False,
                "keyid:always,issuer:always",
                issuer=bad_obj,
            )


class TestPKey:
    """
    Tests for `OpenSSL.crypto.PKey`.
    """

    @pytest.mark.parametrize(
        ("key_string", "key_type"),
        [
            (intermediate_key_pem, rsa.RSAPrivateKey),
            (ec_private_key_pem, ec.EllipticCurvePrivateKey),
            (ed25519_private_key_pem, ed25519.Ed25519PrivateKey),
            (ed448_private_key_pem, ed448.Ed448PrivateKey),
        ],
    )
    def test_convert_roundtrip_cryptography_private_key(
        self, key_string, key_type
    ):
        """
        PKey.from_cryptography_key creates a proper private PKey.
        PKey.to_cryptography_key creates a proper cryptography private key.
        """
        key = serialization.load_pem_private_key(key_string, None)
        pkey = PKey.from_cryptography_key(key)

        assert isinstance(pkey, PKey)
        parsed_key = pkey.to_cryptography_key()
        assert isinstance(parsed_key, key_type)
        assert parsed_key.public_key().public_bytes(
            serialization.Encoding.PEM,
            serialization.PublicFormat.SubjectPublicKeyInfo,
        ) == key.public_key().public_bytes(
            serialization.Encoding.PEM,
            serialization.PublicFormat.SubjectPublicKeyInfo,
        )
        assert pkey._only_public is False
        assert pkey._initialized is True

    def test_convert_from_cryptography_public_key(self):
        """
        PKey.from_cryptography_key creates a proper public PKey.
        """
        key = serialization.load_pem_public_key(cleartextPublicKeyPEM)
        pkey = PKey.from_cryptography_key(key)

        assert isinstance(pkey, PKey)
        assert pkey.bits() == key.key_size
        assert pkey._only_public is True
        assert pkey._initialized is True

    def test_convert_from_cryptography_unsupported_type(self):
        """
        PKey.from_cryptography_key raises TypeError with an unsupported type.
        """
        key = serialization.load_pem_private_key(x25519_private_key_pem, None)
        with pytest.raises(TypeError):
            PKey.from_cryptography_key(key)

    def test_convert_public_pkey_to_cryptography_key(self):
        """
        PKey.to_cryptography_key creates a proper cryptography public key.
        """
        pkey = load_publickey(FILETYPE_PEM, cleartextPublicKeyPEM)
        key = pkey.to_cryptography_key()

        assert isinstance(key, rsa.RSAPublicKey)
        assert pkey.bits() == key.key_size

    def test_type(self):
        """
        `PKey` can be used to create instances of that type.
        """
        assert is_consistent_type(PKey, "PKey")

    def test_construction(self):
        """
        `PKey` takes no arguments and returns a new `PKey` instance.
        """
        key = PKey()
        assert isinstance(key, PKey)

    def test_pregeneration(self):
        """
        `PKey.bits` and `PKey.type` return `0` before the key is generated.
        `PKey.check` raises `TypeError` before the key is generated.
        """
        key = PKey()
        assert key.type() == 0
        assert key.bits() == 0
        with pytest.raises(TypeError):
            key.check()

    def test_failed_generation(self):
        """
        `PKey.generate_key` takes two arguments, the first giving the key type
        as one of `TYPE_RSA` or `TYPE_DSA` and the second giving the number of
        bits to generate.  If an invalid type is specified or generation fails,
        `Error` is raised.  If an invalid number of bits is specified,
        `ValueError` or `Error` is raised.
        """
        key = PKey()
        with pytest.raises(TypeError):
            key.generate_key("foo", "bar")
        with pytest.raises(Error):
            key.generate_key(-1, 0)

        with pytest.raises(ValueError):
            key.generate_key(TYPE_RSA, -1)
        with pytest.raises(ValueError):
            key.generate_key(TYPE_RSA, 0)

        with pytest.raises(TypeError):
            key.generate_key(TYPE_RSA, object())

        # XXX RSA generation for small values of bits is fairly buggy in a wide
        # range of OpenSSL versions.  I need to figure out what the safe lower
        # bound for a reasonable number of OpenSSL versions is and explicitly
        # check for that in the wrapper.  The failure behavior is typically an
        # infinite loop inside OpenSSL.

        # with pytest.raises(Error):
        #     key.generate_key(TYPE_RSA, 2)

        # XXX DSA generation seems happy with any number of bits.  The DSS
        # says bits must be between 512 and 1024 inclusive.  OpenSSL's DSA
        # generator doesn't seem to care about the upper limit at all.  For
        # the lower limit, it uses 512 if anything smaller is specified.
        # So, it doesn't seem possible to make generate_key fail for
        # TYPE_DSA with a bits argument which is at least an int.

        # with pytest.raises(Error):
        #     key.generate_key(TYPE_DSA, -7)

    def test_rsa_generation(self):
        """
        `PKey.generate_key` generates an RSA key when passed `TYPE_RSA` as a
        type and a reasonable number of bits.
        """
        bits = 2048
        key = PKey()
        key.generate_key(TYPE_RSA, bits)
        assert key.type() == TYPE_RSA
        assert key.bits() == bits
        assert key.check()

    def test_dsa_generation(self):
        """
        `PKey.generate_key` generates a DSA key when passed `TYPE_DSA` as a
        type and a reasonable number of bits.
        """
        # 512 is a magic number.  The DSS (Digital Signature Standard)
        # allows a minimum of 512 bits for DSA.  DSA_generate_parameters
        # will silently promote any value below 512 to 512.
        bits = 512
        key = PKey()
        key.generate_key(TYPE_DSA, bits)
        assert key.type() == TYPE_DSA
        assert key.bits() == bits
        with pytest.raises(TypeError):
            key.check()

    def test_regeneration(self):
        """
        `PKey.generate_key` can be called multiple times on the same key to
        generate new keys.
        """
        key = PKey()
        for type, bits in [(TYPE_RSA, 2048), (TYPE_DSA, 576)]:
            key.generate_key(type, bits)
            assert key.type() == type
            assert key.bits() == bits

    def test_inconsistent_key(self):
        """
        Either `load_privatekey` or `PKey.check` returns `Error` if the key is
        not consistent.
        """
        with pytest.raises(Error):
            key = load_privatekey(FILETYPE_PEM, inconsistentPrivateKeyPEM)
            key.check()

    def test_check_public_key(self):
        """
        `PKey.check` raises `TypeError` if only the public part of the key
        is available.
        """
        # A trick to get a public-only key
        key = PKey()
        key.generate_key(TYPE_RSA, 2048)
        cert = X509()
        cert.set_pubkey(key)
        pub = cert.get_pubkey()
        with pytest.raises(TypeError):
            pub.check()

    def test_check_pr_897(self):
        """
        Either `load_privatekey` or `PKey.check` raises `OpenSSL.crypto.Error`
        if provided with broken key
        """
        with pytest.raises(Error):
            pkey = load_privatekey(FILETYPE_PEM, rsa_p_not_prime_pem)
            pkey.check()


def x509_name(**attrs):
    """
    Return a new X509Name with the given attributes.
    """
    # XXX There's no other way to get a new X509Name yet.
    name = X509().get_subject()
    attrs = list(attrs.items())

    # Make the order stable - order matters!
    def key(attr):
        return attr[1]

    attrs.sort(key=key)
    for k, v in attrs:
        setattr(name, k, v)
    return name


class TestX509Name:
    """
    Unit tests for `OpenSSL.crypto.X509Name`.
    """

    def test_type(self):
        """
        The type of X509Name objects is `X509Name`.
        """
        name = x509_name()
        assert isinstance(name, X509Name)

    def test_only_string_attributes(self):
        """
        Attempting to set a non-`str` attribute name on an `X509Name` instance
        causes `TypeError` to be raised.
        """
        name = x509_name()
        # Beyond these cases, you may also think that unicode should be
        # rejected.  Sorry, you're wrong.  unicode is automatically converted
        # to str outside of the control of X509Name, so there's no way to
        # reject it.

        # Also, this used to test str subclasses, but that test is less
        # relevant now that the implementation is in Python instead of C.  Also
        # PyPy automatically converts str subclasses to str when they are
        # passed to setattr, so we can't test it on PyPy.  Apparently CPython
        # does this sometimes as well.
        with pytest.raises(TypeError):
            setattr(name, None, "hello")
        with pytest.raises(TypeError):
            setattr(name, 30, "hello")

    def test_set_invalid_attribute(self):
        """
        Attempting to set any attribute name on an `X509Name` instance for
        which no corresponding NID is defined causes `AttributeError` to be
        raised.
        """
        name = x509_name()
        with pytest.raises(AttributeError):
            setattr(name, "no such thing", None)

    def test_attributes(self):
        """
        `X509Name` instances have attributes for each standard (?)
        X509Name field.
        """
        name = x509_name()
        name.commonName = "foo"
        assert name.commonName == "foo"
        assert name.CN == "foo"

        name.CN = "baz"
        assert name.commonName == "baz"
        assert name.CN == "baz"

        name.commonName = "bar"
        assert name.commonName == "bar"
        assert name.CN == "bar"

        name.CN = "quux"
        assert name.commonName == "quux"
        assert name.CN == "quux"

        assert name.OU is None

        with pytest.raises(AttributeError):
            name.foobar

    def test_copy(self):
        """
        `X509Name` creates a new `X509Name` instance with all the same
        attributes as an existing `X509Name` instance when called with one.
        """
        name = x509_name(commonName="foo", emailAddress="bar@example.com")

        copy = X509Name(name)
        assert copy.commonName == "foo"
        assert copy.emailAddress == "bar@example.com"

        # Mutate the copy and ensure the original is unmodified.
        copy.commonName = "baz"
        assert name.commonName == "foo"

        # Mutate the original and ensure the copy is unmodified.
        name.emailAddress = "quux@example.com"
        assert copy.emailAddress == "bar@example.com"

    def test_repr(self):
        """
        `repr` passed an `X509Name` instance should return a string containing
        a description of the type and the NIDs which have been set on it.
        """
        name = x509_name(commonName="foo", emailAddress="bar")
        assert repr(name) == "<X509Name object '/emailAddress=bar/CN=foo'>"

    def test_comparison(self):
        """
        `X509Name` instances should compare based on their NIDs.
        """

        def _equality(a, b, assert_true, assert_false):
            assert_true(a == b)
            assert_false(a != b)
            assert_true(b == a)
            assert_false(b != a)

        def assert_true(x):
            assert x

        def assert_false(x):
            assert not x

        def assert_equal(a, b):
            _equality(a, b, assert_true, assert_false)

        # Instances compare equal to themselves.
        name = x509_name()
        assert_equal(name, name)

        # Empty instances should compare equal to each other.
        assert_equal(x509_name(), x509_name())

        # Instances with equal NIDs should compare equal to each other.
        assert_equal(x509_name(commonName="foo"), x509_name(commonName="foo"))

        # Instance with equal NIDs set using different aliases should compare
        # equal to each other.
        assert_equal(x509_name(commonName="foo"), x509_name(CN="foo"))

        # Instances with more than one NID with the same values should compare
        # equal to each other.
        assert_equal(
            x509_name(CN="foo", organizationalUnitName="bar"),
            x509_name(commonName="foo", OU="bar"),
        )

        def assert_not_equal(a, b):
            _equality(a, b, assert_false, assert_true)

        # Instances with different values for the same NID should not compare
        # equal to each other.
        assert_not_equal(x509_name(CN="foo"), x509_name(CN="bar"))

        # Instances with different NIDs should not compare equal to each other.
        assert_not_equal(x509_name(CN="foo"), x509_name(OU="foo"))

        assert_not_equal(x509_name(), object())

        def _inequality(a, b, assert_true, assert_false):
            assert_true(a < b)
            assert_true(a <= b)
            assert_true(b > a)
            assert_true(b >= a)
            assert_false(a > b)
            assert_false(a >= b)
            assert_false(b < a)
            assert_false(b <= a)

        def assert_less_than(a, b):
            _inequality(a, b, assert_true, assert_false)

        # An X509Name with a NID with a value which sorts less than the value
        # of the same NID on another X509Name compares less than the other
        # X509Name.
        assert_less_than(x509_name(CN="abc"), x509_name(CN="def"))

        def assert_greater_than(a, b):
            _inequality(a, b, assert_false, assert_true)

        # An X509Name with a NID with a value which sorts greater than the
        # value of the same NID on another X509Name compares greater than the
        # other X509Name.
        assert_greater_than(x509_name(CN="def"), x509_name(CN="abc"))

        def assert_raises(a, b):
            with pytest.raises(TypeError):
                a < b
            with pytest.raises(TypeError):
                a <= b
            with pytest.raises(TypeError):
                a > b
            with pytest.raises(TypeError):
                a >= b

        # Only X509Name objects can be compared with lesser than / greater than
        assert_raises(x509_name(), object())

    def test_hash(self):
        """
        `X509Name.hash` returns an integer hash based on the value of the name.
        """
        a = x509_name(CN="foo")
        b = x509_name(CN="foo")
        assert a.hash() == b.hash()
        a.CN = "bar"
        assert a.hash() != b.hash()

    def test_der(self):
        """
        `X509Name.der` returns the DER encoded form of the name.
        """
        a = x509_name(CN="foo", C="US")
        assert (
            a.der() == b"0\x1b1\x0b0\t\x06\x03U\x04\x06\x13\x02US"
            b"1\x0c0\n\x06\x03U\x04\x03\x0c\x03foo"
        )

    def test_get_components(self):
        """
        `X509Name.get_components` returns a `list` of two-tuples of `str`
        giving the NIDs and associated values which make up the name.
        """
        a = x509_name()
        assert a.get_components() == []
        a.CN = "foo"
        assert a.get_components() == [(b"CN", b"foo")]
        a.organizationalUnitName = "bar"
        assert a.get_components() == [(b"CN", b"foo"), (b"OU", b"bar")]

    def test_load_nul_byte_attribute(self):
        """
        An `X509Name` from an `X509` instance loaded from a file can have a
        NUL byte in the value of one of its attributes.
        """
        cert = load_certificate(FILETYPE_PEM, nulbyteSubjectAltNamePEM)
        subject = cert.get_subject()
        assert "null.python.org\x00example.org" == subject.commonName

    def test_load_nul_byte_components(self):
        """
        An `X509Name` from an `X509` instance loaded from a file can have a
        NUL byte in the value of its components
        """
        cert = load_certificate(FILETYPE_PEM, nulbyteSubjectAltNamePEM)
        subject = cert.get_subject()
        components = subject.get_components()
        ccn = [value for name, value in components if name == b"CN"]
        assert ccn[0] == b"null.python.org\x00example.org"

    def test_set_attribute_failure(self):
        """
        If the value of an attribute cannot be set for some reason then
        `Error` is raised.
        """
        name = x509_name()
        # This value is too long
        with pytest.raises(Error):
            setattr(name, "O", b"x" * 512)


class _PKeyInteractionTestsMixin:
    """
    Tests which involve another thing and a PKey.
    """

    def signable(self):
        """
        Return something with `set_pubkey` and `sign` methods.
        """
        raise NotImplementedError()

    def test_sign_with_ungenerated(self):
        """
        `X509Req.sign` raises `ValueError` when passed a `PKey` with no parts.
        """
        request = self.signable()
        key = PKey()
        with pytest.raises(ValueError):
            request.sign(key, GOOD_DIGEST)

    def test_sign_with_public_key(self):
        """
        `X509Req.sign` raises `ValueError` when passed a `PKey` with no private
        part as the signing key.
        """
        request = self.signable()
        key = PKey()
        key.generate_key(TYPE_RSA, 2048)
        request.set_pubkey(key)
        pub = request.get_pubkey()
        with pytest.raises(ValueError):
            request.sign(pub, GOOD_DIGEST)

    def test_sign_with_unknown_digest(self):
        """
        `X509Req.sign` raises `ValueError` when passed a digest name which is
        not known.
        """
        request = self.signable()
        key = PKey()
        key.generate_key(TYPE_RSA, 2048)
        with pytest.raises(ValueError):
            request.sign(key, BAD_DIGEST)

    def test_sign(self):
        """
        `X509Req.sign` succeeds when passed a private key object and a
        valid digest function. `X509Req.verify` can be used to check
        the signature.
        """
        request = self.signable()
        key = PKey()
        key.generate_key(TYPE_RSA, 2048)
        request.set_pubkey(key)
        request.sign(key, GOOD_DIGEST)
        # If the type has a verify method, cover that too.
        if getattr(request, "verify", None) is not None:
            pub = request.get_pubkey()
            assert request.verify(pub)
            # Make another key that won't verify.
            key = PKey()
            key.generate_key(TYPE_RSA, 2048)
            with pytest.raises(Error):
                request.verify(key)


class TestX509Req(_PKeyInteractionTestsMixin):
    """
    Tests for `OpenSSL.crypto.X509Req`.
    """

    def signable(self):
        """
        Create and return a new `X509Req`.
        """
        return X509Req()

    def test_type(self):
        """
        `X509Req` can be used to create instances of that type.
        """
        assert is_consistent_type(X509Req, "X509Req")

    def test_construction(self):
        """
        `X509Req` takes no arguments and returns an `X509Req` instance.
        """
        request = X509Req()
        assert isinstance(request, X509Req)

    def test_version(self):
        """
        `X509Req.set_version` sets the X.509 version of the certificate
        request. `X509Req.get_version` returns the X.509 version of the
        certificate request. The only defined version is 0.
        """
        request = X509Req()
        assert request.get_version() == 0
        request.set_version(0)
        assert request.get_version() == 0

    def test_version_wrong_args(self):
        """
        `X509Req.set_version` raises `TypeError` if called with a non-`int`
        argument.
        """
        request = X509Req()
        with pytest.raises(TypeError):
            request.set_version("foo")
        with pytest.raises(ValueError):
            request.set_version(2)

    def test_get_subject(self):
        """
        `X509Req.get_subject` returns an `X509Name` for the subject of the
        request and which is valid even after the request object is
        otherwise dead.
        """
        request = X509Req()
        subject = request.get_subject()
        assert isinstance(subject, X509Name)
        subject.commonName = "foo"
        assert request.get_subject().commonName == "foo"
        del request
        subject.commonName = "bar"
        assert subject.commonName == "bar"

    def test_add_extensions(self):
        """
        `X509Req.add_extensions` accepts a `list` of `X509Extension` instances
        and adds them to the X509 request.
        """
        request = X509Req()
        request.add_extensions(
            [X509Extension(b"basicConstraints", True, b"CA:false")]
        )
        exts = request.get_extensions()
        assert len(exts) == 1
        assert exts[0].get_short_name() == b"basicConstraints"
        assert exts[0].get_critical() == 1
        assert exts[0].get_data() == b"0\x00"

    def test_get_extensions(self):
        """
        `X509Req.get_extensions` returns a `list` of extensions added to this
        X509 request.
        """
        request = X509Req()
        exts = request.get_extensions()
        assert exts == []
        request.add_extensions(
            [
                X509Extension(b"basicConstraints", True, b"CA:true"),
                X509Extension(b"keyUsage", False, b"digitalSignature"),
            ]
        )
        exts = request.get_extensions()
        assert len(exts) == 2
        assert exts[0].get_short_name() == b"basicConstraints"
        assert exts[0].get_critical() == 1
        assert exts[0].get_data() == b"0\x03\x01\x01\xff"
        assert exts[1].get_short_name() == b"keyUsage"
        assert exts[1].get_critical() == 0
        assert exts[1].get_data() == b"\x03\x02\x07\x80"
        # Requesting it a second time should return the same list
        exts = request.get_extensions()
        assert len(exts) == 2

    def test_undef_oid(self):
        assert (
            X509Extension(
                b"1.2.3.4.5.6.7", False, b"DER:05:00"
            ).get_short_name()
            == b"UNDEF"
        )

    def test_add_extensions_wrong_args(self):
        """
        `X509Req.add_extensions` raises `TypeError` if called with a
        non-`list`.  Or it raises `ValueError` if called with a `list`
        containing objects other than `X509Extension` instances.
        """
        request = X509Req()
        with pytest.raises(TypeError):
            request.add_extensions(object())
        with pytest.raises(ValueError):
            request.add_extensions([object()])

    def test_verify_wrong_args(self):
        """
        `X509Req.verify` raises `TypeError` if passed anything other than a
        `PKey` instance as its single argument.
        """
        request = X509Req()
        with pytest.raises(TypeError):
            request.verify(object())

    def test_verify_uninitialized_key(self):
        """
        `X509Req.verify` raises `OpenSSL.crypto.Error` if called with a
        `OpenSSL.crypto.PKey` which contains no key data.
        """
        request = X509Req()
        pkey = PKey()
        with pytest.raises(Error):
            request.verify(pkey)

    def test_verify_wrong_key(self):
        """
        `X509Req.verify` raises `OpenSSL.crypto.Error` if called with a
        `OpenSSL.crypto.PKey` which does not represent the public part of the
        key which signed the request.
        """
        request = X509Req()
        pkey = load_privatekey(FILETYPE_PEM, root_key_pem)
        request.set_pubkey(pkey)
        request.sign(pkey, GOOD_DIGEST)
        another_pkey = load_privatekey(FILETYPE_PEM, client_key_pem)
        with pytest.raises(Error):
            request.verify(another_pkey)

    def test_verify_success(self):
        """
        `X509Req.verify` returns `True` if called with a `OpenSSL.crypto.PKey`
        which represents the public part of the key which signed the request.
        """
        request = X509Req()
        pkey = load_privatekey(FILETYPE_PEM, root_key_pem)
        request.set_pubkey(pkey)
        request.sign(pkey, GOOD_DIGEST)
        assert request.verify(pkey)

    def test_convert_from_cryptography(self):
        crypto_req = x509.load_pem_x509_csr(cleartextCertificateRequestPEM)
        req = X509Req.from_cryptography(crypto_req)
        assert isinstance(req, X509Req)

    def test_convert_from_cryptography_unsupported_type(self):
        with pytest.raises(TypeError):
            X509Req.from_cryptography(object())

    def test_convert_to_cryptography_key(self):
        req = load_certificate_request(
            FILETYPE_PEM, cleartextCertificateRequestPEM
        )
        crypto_req = req.to_cryptography()
        assert isinstance(crypto_req, x509.CertificateSigningRequest)


class TestX509(_PKeyInteractionTestsMixin):
    """
    Tests for `OpenSSL.crypto.X509`.
    """

    pemData = root_cert_pem + root_key_pem

    def signable(self):
        """
        Create and return a new `X509`.
        """
        certificate = X509()
        # Fill in placeholder validity values. signable only expects to call
        # set_pubkey and sign.
        certificate.gmtime_adj_notBefore(-24 * 60 * 60)
        certificate.gmtime_adj_notAfter(24 * 60 * 60)
        return certificate

    def test_type(self):
        """
        `X509` can be used to create instances of that type.
        """
        assert is_consistent_type(X509, "X509")

    def test_construction(self):
        """
        `X509` takes no arguments and returns an instance of `X509`.
        """
        certificate = X509()
        assert isinstance(certificate, X509)
        assert type(certificate).__name__ == "X509"
        assert type(certificate) is X509

    def test_set_version_wrong_args(self):
        """
        `X509.set_version` raises `TypeError` if invoked with an argument
        not of type `int`.
        """
        cert = X509()
        with pytest.raises(TypeError):
            cert.set_version(None)

    def test_version(self):
        """
        `X509.set_version` sets the certificate version number.
        `X509.get_version` retrieves it.
        """
        cert = X509()
        cert.set_version(2)
        assert cert.get_version() == 2

    def test_serial_number(self):
        """
        The serial number of an `X509` can be retrieved and
        modified with `X509.get_serial_number` and
        `X509.set_serial_number`.
        """
        certificate = X509()
        with pytest.raises(TypeError):
            certificate.set_serial_number("1")
        assert certificate.get_serial_number() == 0
        certificate.set_serial_number(1)
        assert certificate.get_serial_number() == 1
        certificate.set_serial_number(2**32 + 1)
        assert certificate.get_serial_number() == 2**32 + 1
        certificate.set_serial_number(2**64 + 1)
        assert certificate.get_serial_number() == 2**64 + 1
        certificate.set_serial_number(2**128 + 1)
        assert certificate.get_serial_number() == 2**128 + 1

    def _setBoundTest(self, which):
        """
        `X509.set_notBefore` takes a string in the format of an
        ASN1 GENERALIZEDTIME and sets the beginning of the certificate's
        validity period to it.
        """
        certificate = X509()
        set = getattr(certificate, "set_not" + which)
        get = getattr(certificate, "get_not" + which)

        # Starts with no value.
        assert get() is None

        # GMT (Or is it UTC?) -exarkun
        when = b"20040203040506Z"
        set(when)
        assert get() == when

        # A plus two hours and thirty minutes offset
        when = b"20040203040506+0530"
        set(when)
        assert get() == when

        # A minus one hour fifteen minutes offset
        when = b"20040203040506-0115"
        set(when)
        assert get() == when

        # An invalid string results in a ValueError
        with pytest.raises(ValueError):
            set(b"foo bar")

        # The wrong number of arguments results in a TypeError.
        with pytest.raises(TypeError):
            set()
        with pytest.raises(TypeError):
            set(b"20040203040506Z", b"20040203040506Z")
        with pytest.raises(TypeError):
            get(b"foo bar")

    # XXX ASN1_TIME (not GENERALIZEDTIME)

    def test_set_notBefore(self):
        """
        `X509.set_notBefore` takes a string in the format of an
        ASN1 GENERALIZEDTIME and sets the beginning of the certificate's
        validity period to it.
        """
        self._setBoundTest("Before")

    def test_set_notAfter(self):
        """
        `X509.set_notAfter` takes a string in the format of an ASN1
        GENERALIZEDTIME and sets the end of the certificate's validity period
        to it.
        """
        self._setBoundTest("After")

    def test_get_notBefore(self):
        """
        `X509.get_notBefore` returns a string in the format of an
        ASN1 GENERALIZEDTIME even for certificates which store it as UTCTIME
        internally.
        """
        cert = load_certificate(FILETYPE_PEM, old_root_cert_pem)
        assert cert.get_notBefore() == b"20090325123658Z"

    def test_get_notAfter(self):
        """
        `X509.get_notAfter` returns a string in the format of an
        ASN1 GENERALIZEDTIME even for certificates which store it as UTCTIME
        internally.
        """
        cert = load_certificate(FILETYPE_PEM, old_root_cert_pem)
        assert cert.get_notAfter() == b"20170611123658Z"

    def test_gmtime_adj_notBefore_wrong_args(self):
        """
        `X509.gmtime_adj_notBefore` raises `TypeError` if called with a
        non-`int` argument.
        """
        cert = X509()
        with pytest.raises(TypeError):
            cert.gmtime_adj_notBefore(None)

    @pytest.mark.flaky(reruns=2)
    def test_gmtime_adj_notBefore(self):
        """
        `X509.gmtime_adj_notBefore` changes the not-before timestamp to be the
        current time plus the number of seconds passed in.
        """
        cert = load_certificate(FILETYPE_PEM, self.pemData)
        not_before_min = utcnow().replace(microsecond=0) + timedelta(
            seconds=100
        )
        cert.gmtime_adj_notBefore(100)
        not_before = datetime.strptime(
            cert.get_notBefore().decode(), "%Y%m%d%H%M%SZ"
        )
        not_before_max = utcnow() + timedelta(seconds=100)
        assert not_before_min <= not_before <= not_before_max

    def test_gmtime_adj_notAfter_wrong_args(self):
        """
        `X509.gmtime_adj_notAfter` raises `TypeError` if called with a
        non-`int` argument.
        """
        cert = X509()
        with pytest.raises(TypeError):
            cert.gmtime_adj_notAfter(None)

    @pytest.mark.flaky(reruns=2)
    def test_gmtime_adj_notAfter(self):
        """
        `X509.gmtime_adj_notAfter` changes the not-after timestamp
        to be the current time plus the number of seconds passed in.
        """
        cert = load_certificate(FILETYPE_PEM, self.pemData)
        not_after_min = utcnow().replace(microsecond=0) + timedelta(
            seconds=100
        )
        cert.gmtime_adj_notAfter(100)
        not_after = datetime.strptime(
            cert.get_notAfter().decode(), "%Y%m%d%H%M%SZ"
        )
        not_after_max = utcnow() + timedelta(seconds=100)
        assert not_after_min <= not_after <= not_after_max

    def test_has_expired(self):
        """
        `X509.has_expired` returns `True` if the certificate's not-after time
        is in the past.
        """
        cert = X509()
        cert.gmtime_adj_notAfter(-1)
        assert cert.has_expired()

    def test_has_not_expired(self):
        """
        `X509.has_expired` returns `False` if the certificate's not-after time
        is in the future.
        """
        cert = X509()
        cert.gmtime_adj_notAfter(2)
        assert not cert.has_expired()

    def test_has_expired_exception(self):
        """
        `X509.has_expired` throws ValueError if not-after time is not set
        """
        cert = X509()
        with pytest.raises(ValueError):
            cert.has_expired()

    def test_root_has_not_expired(self):
        """
        `X509.has_expired` returns `False` if the certificate's not-after time
        is in the future.
        """
        cert = load_certificate(FILETYPE_PEM, root_cert_pem)
        assert not cert.has_expired()

    def test_digest(self):
        """
        `X509.digest` returns a string giving ":"-separated hex-encoded
        words of the digest of the certificate.
        """
        cert = load_certificate(FILETYPE_PEM, old_root_cert_pem)
        assert (
            # Digest verified with the command:
            # openssl x509 -in root_cert.pem -noout -fingerprint -sha256
            cert.digest("SHA256")
            == (
                b"3E:0F:16:39:6B:B1:3E:4F:08:85:C6:5F:10:0D:CB:2C:"
                b"25:C2:91:4E:D0:4A:C2:29:06:BD:55:E3:A7:B3:B7:06"
            )
        )

    def _extcert(self, pkey, extensions):
        cert = X509()
        # Certificates with extensions must be X.509v3, which is encoded with a
        # version of two.
        cert.set_version(2)
        cert.set_pubkey(pkey)
        cert.get_subject().commonName = "Unit Tests"
        cert.get_issuer().commonName = "Unit Tests"
        when = datetime.now().strftime("%Y%m%d%H%M%SZ").encode("ascii")
        cert.set_notBefore(when)
        cert.set_notAfter(when)

        cert.add_extensions(extensions)
        cert.sign(pkey, "sha256")
        return load_certificate(
            FILETYPE_PEM, dump_certificate(FILETYPE_PEM, cert)
        )

    def test_extension_count(self):
        """
        `X509.get_extension_count` returns the number of extensions
        that are present in the certificate.
        """
        pkey = load_privatekey(FILETYPE_PEM, client_key_pem)
        ca = X509Extension(b"basicConstraints", True, b"CA:FALSE")
        key = X509Extension(b"keyUsage", True, b"digitalSignature")
        subjectAltName = X509Extension(
            b"subjectAltName", True, b"DNS:example.com"
        )

        # Try a certificate with no extensions at all.
        c = self._extcert(pkey, [])
        assert c.get_extension_count() == 0

        # And a certificate with one
        c = self._extcert(pkey, [ca])
        assert c.get_extension_count() == 1

        # And a certificate with several
        c = self._extcert(pkey, [ca, key, subjectAltName])
        assert c.get_extension_count() == 3

    def test_get_extension(self):
        """
        `X509.get_extension` takes an integer and returns an
        `X509Extension` corresponding to the extension at that index.
        """
        pkey = load_privatekey(FILETYPE_PEM, client_key_pem)
        ca = X509Extension(b"basicConstraints", True, b"CA:FALSE")
        key = X509Extension(b"keyUsage", True, b"digitalSignature")
        subjectAltName = X509Extension(
            b"subjectAltName", False, b"DNS:example.com"
        )

        cert = self._extcert(pkey, [ca, key, subjectAltName])

        ext = cert.get_extension(0)
        assert isinstance(ext, X509Extension)
        assert ext.get_critical()
        assert ext.get_short_name() == b"basicConstraints"

        ext = cert.get_extension(1)
        assert isinstance(ext, X509Extension)
        assert ext.get_critical()
        assert ext.get_short_name() == b"keyUsage"

        ext = cert.get_extension(2)
        assert isinstance(ext, X509Extension)
        assert not ext.get_critical()
        assert ext.get_short_name() == b"subjectAltName"

        with pytest.raises(IndexError):
            cert.get_extension(-1)
        with pytest.raises(IndexError):
            cert.get_extension(4)
        with pytest.raises(TypeError):
            cert.get_extension("hello")

    def test_nullbyte_subjectAltName(self):
        """
        The fields of a `subjectAltName` extension on an X509 may contain NUL
        bytes and this value is reflected in the string representation of the
        extension object.
        """
        cert = load_certificate(FILETYPE_PEM, nulbyteSubjectAltNamePEM)

        ext = cert.get_extension(3)
        assert ext.get_short_name() == b"subjectAltName"
        assert (
            b"DNS:altnull.python.org\x00example.com, "
            b"email:null@python.org\x00user@example.org, "
            b"URI:http://null.python.org\x00http://example.org, "
            b"IP Address:192.0.2.1, IP Address:2001:DB8:0:0:0:0:0:1"
            == str(ext).encode("ascii").strip()
        )

    def test_invalid_digest_algorithm(self):
        """
        `X509.digest` raises `ValueError` if called with an unrecognized hash
        algorithm.
        """
        cert = X509()
        with pytest.raises(ValueError):
            cert.digest(BAD_DIGEST)

    def test_get_subject(self):
        """
        `X509.get_subject` returns an `X509Name` instance.
        """
        cert = load_certificate(FILETYPE_PEM, self.pemData)
        subj = cert.get_subject()
        assert isinstance(subj, X509Name)
        assert subj.get_components() == [
            (b"C", b"US"),
            (b"ST", b"IL"),
            (b"L", b"Chicago"),
            (b"O", b"Testing"),
            (b"CN", b"Testing Root CA"),
        ]

    def test_set_subject_wrong_args(self):
        """
        `X509.set_subject` raises a `TypeError` if called with an argument not
        of type `X509Name`.
        """
        cert = X509()
        with pytest.raises(TypeError):
            cert.set_subject(None)

    def test_set_subject(self):
        """
        `X509.set_subject` changes the subject of the certificate to the one
        passed in.
        """
        cert = X509()
        name = cert.get_subject()
        name.C = "AU"
        name.OU = "Unit Tests"
        cert.set_subject(name)
        assert cert.get_subject().get_components() == [
            (b"C", b"AU"),
            (b"OU", b"Unit Tests"),
        ]

    def test_get_issuer(self):
        """
        `X509.get_issuer` returns an `X509Name` instance.
        """
        cert = load_certificate(FILETYPE_PEM, self.pemData)
        subj = cert.get_issuer()
        assert isinstance(subj, X509Name)
        comp = subj.get_components()
        assert comp == [
            (b"C", b"US"),
            (b"ST", b"IL"),
            (b"L", b"Chicago"),
            (b"O", b"Testing"),
            (b"CN", b"Testing Root CA"),
        ]

    def test_set_issuer_wrong_args(self):
        """
        `X509.set_issuer` raises a `TypeError` if called with an argument not
        of type `X509Name`.
        """
        cert = X509()
        with pytest.raises(TypeError):
            cert.set_issuer(None)

    def test_set_issuer(self):
        """
        `X509.set_issuer` changes the issuer of the certificate to the
        one passed in.
        """
        cert = X509()
        name = cert.get_issuer()
        name.C = "AU"
        name.OU = "Unit Tests"
        cert.set_issuer(name)
        assert cert.get_issuer().get_components() == [
            (b"C", b"AU"),
            (b"OU", b"Unit Tests"),
        ]

    def test_get_pubkey_uninitialized(self):
        """
        When called on a certificate with no public key, `X509.get_pubkey`
        raises `OpenSSL.crypto.Error`.
        """
        cert = X509()
        with pytest.raises(Error):
            cert.get_pubkey()

    def test_set_pubkey_wrong_type(self):
        """
        `X509.set_pubkey` raises `TypeError` when given an object of the
        wrong type.
        """
        cert = X509()
        with pytest.raises(TypeError):
            cert.set_pubkey(object())

    def test_subject_name_hash(self):
        """
        `X509.subject_name_hash` returns the hash of the certificate's
        subject name.
        """
        cert = load_certificate(FILETYPE_PEM, self.pemData)
        # SHA1
        assert cert.subject_name_hash() == 3278919224

    def test_get_signature_algorithm(self):
        """
        `X509.get_signature_algorithm` returns a string which means
        the algorithm used to sign the certificate.
        """
        cert = load_certificate(FILETYPE_PEM, self.pemData)
        assert b"sha256WithRSAEncryption" == cert.get_signature_algorithm()

    def test_get_undefined_signature_algorithm(self):
        """
        `X509.get_signature_algorithm` raises `ValueError` if the signature
        algorithm is undefined or unknown.
        """
        # This certificate has been modified to indicate a bogus OID in the
        # signature algorithm field so that OpenSSL does not recognize it.
        certPEM = b"""\
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
"""
        cert = load_certificate(FILETYPE_PEM, certPEM)
        with pytest.raises(ValueError):
            cert.get_signature_algorithm()

    def test_sign_bad_pubkey_type(self):
        """
        `X509.sign` raises `TypeError` when called with the wrong type.
        """
        cert = X509()
        with pytest.raises(TypeError):
            cert.sign(object(), b"sha256")

    def test_convert_from_cryptography(self):
        crypto_cert = x509.load_pem_x509_certificate(intermediate_cert_pem)
        cert = X509.from_cryptography(crypto_cert)

        assert isinstance(cert, X509)
        assert cert.get_version() == crypto_cert.version.value

    def test_convert_from_cryptography_unsupported_type(self):
        with pytest.raises(TypeError):
            X509.from_cryptography(object())

    def test_convert_to_cryptography_key(self):
        cert = load_certificate(FILETYPE_PEM, intermediate_cert_pem)
        crypto_cert = cert.to_cryptography()

        assert isinstance(crypto_cert, x509.Certificate)
        assert crypto_cert.version.value == cert.get_version()


class TestX509Store:
    """
    Test for `OpenSSL.crypto.X509Store`.
    """

    def test_type(self):
        """
        `X509Store` is a type object.
        """
        assert is_consistent_type(X509Store, "X509Store")

    def test_add_cert(self):
        """
        `X509Store.add_cert` adds a `X509` instance to the certificate store.
        """
        cert = load_certificate(FILETYPE_PEM, root_cert_pem)
        store = X509Store()
        store.add_cert(cert)

    @pytest.mark.parametrize("cert", [None, 1.0, "cert", object()])
    def test_add_cert_wrong_args(self, cert):
        """
        `X509Store.add_cert` raises `TypeError` if passed a non-X509 object
        as its first argument.
        """
        store = X509Store()
        with pytest.raises(TypeError):
            store.add_cert(cert)

    def test_add_cert_accepts_duplicate(self):
        """
        `X509Store.add_cert` doesn't raise `OpenSSL.crypto.Error` if an attempt
        is made to add the same certificate to the store more than once.
        """
        cert = load_certificate(FILETYPE_PEM, root_cert_pem)
        store = X509Store()
        store.add_cert(cert)
        store.add_cert(cert)

    @pytest.mark.parametrize(
        "cafile, capath, call_cafile, call_capath",
        [
            (
                "/cafile" + NON_ASCII,
                None,
                b"/cafile" + NON_ASCII.encode(sys.getfilesystemencoding()),
                _ffi.NULL,
            ),
            (
                b"/cafile" + NON_ASCII.encode("utf-8"),
                None,
                b"/cafile" + NON_ASCII.encode("utf-8"),
                _ffi.NULL,
            ),
            (
                None,
                "/capath" + NON_ASCII,
                _ffi.NULL,
                b"/capath" + NON_ASCII.encode(sys.getfilesystemencoding()),
            ),
            (
                None,
                b"/capath" + NON_ASCII.encode("utf-8"),
                _ffi.NULL,
                b"/capath" + NON_ASCII.encode("utf-8"),
            ),
        ],
    )
    def test_load_locations_parameters(
        self, cafile, capath, call_cafile, call_capath, monkeypatch
    ):
        class LibMock:
            def load_locations(self, store, cafile, capath):
                self.cafile = cafile
                self.capath = capath
                return 1

        lib_mock = LibMock()
        monkeypatch.setattr(
            _lib, "X509_STORE_load_locations", lib_mock.load_locations
        )

        store = X509Store()
        store.load_locations(cafile=cafile, capath=capath)

        assert call_cafile == lib_mock.cafile
        assert call_capath == lib_mock.capath

    def test_load_locations_fails_when_all_args_are_none(self):
        store = X509Store()
        with pytest.raises(Error):
            store.load_locations(None, None)

    def test_load_locations_raises_error_on_failure(self, tmpdir):
        invalid_ca_file = tmpdir.join("invalid.pem")
        invalid_ca_file.write("This is not a certificate")

        store = X509Store()
        with pytest.raises(Error):
            store.load_locations(cafile=str(invalid_ca_file))


def _runopenssl(pem, *args):
    """
    Run the command line openssl tool with the given arguments and write
    the given PEM to its stdin.  Not safe for quotes.
    """
    proc = Popen([b"openssl", *list(args)], stdin=PIPE, stdout=PIPE)
    proc.stdin.write(pem)
    proc.stdin.close()
    output = proc.stdout.read()
    proc.stdout.close()
    proc.wait()
    return output


class TestLoadPublicKey:
    """
    Tests for :func:`load_publickey`.
    """

    def test_loading_works(self):
        """
        load_publickey loads public keys and sets correct attributes.
        """
        key = load_publickey(FILETYPE_PEM, cleartextPublicKeyPEM)

        assert True is key._only_public
        assert 2048 == key.bits()
        assert TYPE_RSA == key.type()

    def test_invalid_type(self):
        """
        load_publickey doesn't support FILETYPE_TEXT.
        """
        with pytest.raises(ValueError):
            load_publickey(FILETYPE_TEXT, cleartextPublicKeyPEM)

    def test_invalid_key_format(self):
        """
        load_publickey explodes on incorrect keys.
        """
        with pytest.raises(Error):
            load_publickey(FILETYPE_ASN1, cleartextPublicKeyPEM)

    def test_tolerates_unicode_strings(self):
        """
        load_publickey works with text strings, not just bytes.
        """
        serialized = cleartextPublicKeyPEM.decode("ascii")
        key = load_publickey(FILETYPE_PEM, serialized)
        dumped_pem = dump_publickey(FILETYPE_PEM, key)

        assert dumped_pem == cleartextPublicKeyPEM


class TestFunction:
    """
    Tests for free-functions in the `OpenSSL.crypto` module.
    """

    def test_load_privatekey_invalid_format(self):
        """
        `load_privatekey` raises `ValueError` if passed an unknown filetype.
        """
        with pytest.raises(ValueError):
            load_privatekey(100, root_key_pem)

    def test_load_privatekey_invalid_passphrase_type(self):
        """
        `load_privatekey` raises `TypeError` if passed a passphrase that is
        neither a `str` nor a callable.
        """
        with pytest.raises(TypeError):
            load_privatekey(
                FILETYPE_PEM, encryptedPrivateKeyPEMPassphrase, object()
            )

    def test_load_privatekey_wrongPassphrase(self):
        """
        `load_privatekey` raises `OpenSSL.crypto.Error` when it is passed an
        encrypted PEM and an incorrect passphrase.
        """
        with pytest.raises(Error) as err:
            load_privatekey(FILETYPE_PEM, encryptedPrivateKeyPEM, b"quack")
        assert err.value.args[0] != []

    def test_load_privatekey_passphraseWrongType(self):
        """
        `load_privatekey` raises `ValueError` when it is passeda passphrase
        with a private key encoded in a format, that doesn't support
        encryption.
        """
        key = load_privatekey(FILETYPE_PEM, root_key_pem)
        blob = dump_privatekey(FILETYPE_ASN1, key)
        with pytest.raises(ValueError):
            load_privatekey(FILETYPE_ASN1, blob, "secret")

    def test_load_privatekey_passphrase(self):
        """
        `load_privatekey` can create a `PKey` object from an encrypted PEM
        string if given the passphrase.
        """
        key = load_privatekey(
            FILETYPE_PEM,
            encryptedPrivateKeyPEM,
            encryptedPrivateKeyPEMPassphrase,
        )
        assert isinstance(key, PKey)

    def test_load_privatekey_passphrase_exception(self):
        """
        If the passphrase callback raises an exception, that exception is
        raised by `load_privatekey`.
        """

        def cb(ignored):
            raise ArithmeticError

        with pytest.raises(ArithmeticError):
            load_privatekey(FILETYPE_PEM, encryptedPrivateKeyPEM, cb)

    def test_load_privatekey_wrongPassphraseCallback(self):
        """
        `load_privatekey` raises `OpenSSL.crypto.Error` when it
        is passed an encrypted PEM and a passphrase callback which returns an
        incorrect passphrase.
        """
        called = []

        def cb(*a):
            called.append(None)
            return b"quack"

        with pytest.raises(Error) as err:
            load_privatekey(FILETYPE_PEM, encryptedPrivateKeyPEM, cb)
        assert called
        assert err.value.args[0] != []

    def test_load_privatekey_passphraseCallback(self):
        """
        `load_privatekey` can create a `PKey` object from an encrypted PEM
        string if given a passphrase callback which returns the correct
        password.
        """
        called = []

        def cb(writing):
            called.append(writing)
            return encryptedPrivateKeyPEMPassphrase

        key = load_privatekey(FILETYPE_PEM, encryptedPrivateKeyPEM, cb)
        assert isinstance(key, PKey)
        assert called == [False]

    def test_load_privatekey_passphrase_wrong_return_type(self):
        """
        `load_privatekey` raises `ValueError` if the passphrase callback
        returns something other than a byte string.
        """
        with pytest.raises(ValueError):
            load_privatekey(
                FILETYPE_PEM, encryptedPrivateKeyPEM, lambda *args: 3
            )

    def test_dump_privatekey_wrong_args(self):
        """
        `dump_privatekey` raises `TypeError` if called with a `cipher`
        argument but no `passphrase` argument.
        """
        key = PKey()
        key.generate_key(TYPE_RSA, 2048)
        with pytest.raises(TypeError):
            dump_privatekey(FILETYPE_PEM, key, cipher=GOOD_CIPHER)

    def test_dump_privatekey_not_rsa_key(self):
        """
        `dump_privatekey` raises `TypeError` if called with a key that is
        not RSA.
        """
        key = PKey()
        key.generate_key(TYPE_DSA, 512)
        with pytest.raises(TypeError):
            dump_privatekey(FILETYPE_TEXT, key)

    def test_dump_privatekey_invalid_pkey(self):
        with pytest.raises(TypeError):
            dump_privatekey(FILETYPE_TEXT, object())

    def test_dump_privatekey_unknown_cipher(self):
        """
        `dump_privatekey` raises `ValueError` if called with an unrecognized
        cipher name.
        """
        key = PKey()
        key.generate_key(TYPE_RSA, 2048)
        with pytest.raises(ValueError):
            dump_privatekey(FILETYPE_PEM, key, BAD_CIPHER, "passphrase")

    def test_dump_privatekey_invalid_passphrase_type(self):
        """
        `dump_privatekey` raises `TypeError` if called with a passphrase which
        is neither a `str` nor a callable.
        """
        key = PKey()
        key.generate_key(TYPE_RSA, 2048)
        with pytest.raises(TypeError):
            dump_privatekey(FILETYPE_PEM, key, GOOD_CIPHER, object())

    def test_dump_privatekey_invalid_filetype(self):
        """
        `dump_privatekey` raises `ValueError` if called with an unrecognized
        filetype.
        """
        key = PKey()
        key.generate_key(TYPE_RSA, 2048)
        with pytest.raises(ValueError):
            dump_privatekey(100, key)

    def test_load_privatekey_passphrase_callback_length(self):
        """
        `crypto.load_privatekey` should raise an error when the passphrase
        provided by the callback is too long, not silently truncate it.
        """

        def cb(ignored):
            return "a" * 1025

        with pytest.raises(ValueError):
            load_privatekey(FILETYPE_PEM, encryptedPrivateKeyPEM, cb)

    def test_dump_privatekey_passphrase(self):
        """
        `dump_privatekey` writes an encrypted PEM when given a passphrase.
        """
        passphrase = b"foo"
        key = load_privatekey(FILETYPE_PEM, root_key_pem)
        pem = dump_privatekey(FILETYPE_PEM, key, GOOD_CIPHER, passphrase)
        assert isinstance(pem, bytes)
        loadedKey = load_privatekey(FILETYPE_PEM, pem, passphrase)
        assert isinstance(loadedKey, PKey)
        assert loadedKey.type() == key.type()
        assert loadedKey.bits() == key.bits()

    def test_dump_privatekey_passphrase_wrong_type(self):
        """
        `dump_privatekey` raises `ValueError` when it is passed a passphrase
        with a private key encoded in a format, that doesn't support
        encryption.
        """
        key = load_privatekey(FILETYPE_PEM, root_key_pem)
        with pytest.raises(ValueError):
            dump_privatekey(FILETYPE_ASN1, key, GOOD_CIPHER, "secret")

    def test_dump_certificate(self):
        """
        `dump_certificate` writes PEM, DER, and text.
        """
        pemData = root_cert_pem + root_key_pem
        cert = load_certificate(FILETYPE_PEM, pemData)
        dumped_pem = dump_certificate(FILETYPE_PEM, cert)
        assert dumped_pem == root_cert_pem
        dumped_der = dump_certificate(FILETYPE_ASN1, cert)
        good_der = _runopenssl(dumped_pem, b"x509", b"-outform", b"DER")
        assert dumped_der == good_der
        cert2 = load_certificate(FILETYPE_ASN1, dumped_der)
        dumped_pem2 = dump_certificate(FILETYPE_PEM, cert2)
        assert dumped_pem2 == root_cert_pem
        dumped_text = dump_certificate(FILETYPE_TEXT, cert)
        assert len(dumped_text) > 500

    def test_dump_certificate_bad_type(self):
        """
        `dump_certificate` raises a `ValueError` if it's called with
        a bad type.
        """
        cert = load_certificate(FILETYPE_PEM, root_cert_pem)
        with pytest.raises(ValueError):
            dump_certificate(object(), cert)

    def test_dump_privatekey_pem(self):
        """
        `dump_privatekey` writes a PEM
        """
        key = load_privatekey(FILETYPE_PEM, root_key_pem)
        assert key.check()
        dumped_pem = dump_privatekey(FILETYPE_PEM, key)
        assert dumped_pem == normalized_root_key_pem

    def test_dump_privatekey_asn1(self):
        """
        `dump_privatekey` writes a DER
        """
        key = load_privatekey(FILETYPE_PEM, root_key_pem)

        dumped_der = dump_privatekey(FILETYPE_ASN1, key)
        assert dumped_der == root_key_der

    def test_load_privatekey_asn1(self):
        """
        `dump_privatekey` writes a DER
        """
        key = load_privatekey(FILETYPE_ASN1, root_key_der)
        assert key.bits() == 3072
        assert key.type() == TYPE_RSA

    def test_dump_privatekey_text(self):
        """
        `dump_privatekey` writes a text
        """
        key = load_privatekey(FILETYPE_PEM, root_key_pem)
        dumped_text = dump_privatekey(FILETYPE_TEXT, key)
        assert len(dumped_text) > 500

    def test_dump_publickey_pem(self):
        """
        dump_publickey writes a PEM.
        """
        key = load_publickey(FILETYPE_PEM, cleartextPublicKeyPEM)
        dumped_pem = dump_publickey(FILETYPE_PEM, key)
        assert dumped_pem == cleartextPublicKeyPEM

    def test_dump_publickey_asn1(self):
        """
        dump_publickey writes a DER.
        """
        key = load_publickey(FILETYPE_PEM, cleartextPublicKeyPEM)
        dumped_der = dump_publickey(FILETYPE_ASN1, key)
        key2 = load_publickey(FILETYPE_ASN1, dumped_der)
        dumped_pem2 = dump_publickey(FILETYPE_PEM, key2)
        assert dumped_pem2 == cleartextPublicKeyPEM

    def test_dump_publickey_invalid_type(self):
        """
        dump_publickey doesn't support FILETYPE_TEXT.
        """
        key = load_publickey(FILETYPE_PEM, cleartextPublicKeyPEM)

        with pytest.raises(ValueError):
            dump_publickey(FILETYPE_TEXT, key)

    def test_dump_certificate_request(self):
        """
        `dump_certificate_request` writes a PEM, DER, and text.
        """
        req = load_certificate_request(
            FILETYPE_PEM, cleartextCertificateRequestPEM
        )
        dumped_pem = dump_certificate_request(FILETYPE_PEM, req)
        assert dumped_pem == cleartextCertificateRequestPEM
        dumped_der = dump_certificate_request(FILETYPE_ASN1, req)
        good_der = _runopenssl(dumped_pem, b"req", b"-outform", b"DER")
        assert dumped_der == good_der
        req2 = load_certificate_request(FILETYPE_ASN1, dumped_der)
        dumped_pem2 = dump_certificate_request(FILETYPE_PEM, req2)
        assert dumped_pem2 == cleartextCertificateRequestPEM
        dumped_text = dump_certificate_request(FILETYPE_TEXT, req)
        assert len(dumped_text) > 500
        with pytest.raises(ValueError):
            dump_certificate_request(100, req)

    def test_dump_privatekey_passphrase_callback(self):
        """
        `dump_privatekey` writes an encrypted PEM when given a callback
        which returns the correct passphrase.
        """
        passphrase = b"foo"
        called = []

        def cb(writing):
            called.append(writing)
            return passphrase

        key = load_privatekey(FILETYPE_PEM, root_key_pem)
        pem = dump_privatekey(FILETYPE_PEM, key, GOOD_CIPHER, cb)
        assert isinstance(pem, bytes)
        assert called == [True]
        loadedKey = load_privatekey(FILETYPE_PEM, pem, passphrase)
        assert isinstance(loadedKey, PKey)
        assert loadedKey.type() == key.type()
        assert loadedKey.bits() == key.bits()

    def test_dump_privatekey_passphrase_exception(self):
        """
        `dump_privatekey` should not overwrite the exception raised
        by the passphrase callback.
        """

        def cb(ignored):
            raise ArithmeticError

        key = load_privatekey(FILETYPE_PEM, root_key_pem)
        with pytest.raises(ArithmeticError):
            dump_privatekey(FILETYPE_PEM, key, GOOD_CIPHER, cb)

    def test_dump_privatekey_passphraseCallbackLength(self):
        """
        `crypto.dump_privatekey` should raise an error when the passphrase
        provided by the callback is too long, not silently truncate it.
        """

        def cb(ignored):
            return "a" * 1025

        key = load_privatekey(FILETYPE_PEM, root_key_pem)
        with pytest.raises(ValueError):
            dump_privatekey(FILETYPE_PEM, key, GOOD_CIPHER, cb)

    def test_dump_privatekey_truncated(self):
        """
        `crypto.dump_privatekey` should not truncate a passphrase that contains
        a null byte.
        """
        key = load_privatekey(FILETYPE_PEM, cleartextPrivateKeyPEM)
        passphrase = b"foo\x00bar"
        truncated_passphrase = passphrase.split(b"\x00", 1)[0]

        # By dumping with the full passphrase load should raise an error if we
        # try to load using the truncated passphrase. If dump truncated the
        # passphrase, then we WILL load the privatekey and the test fails
        encrypted_key_pem = dump_privatekey(
            FILETYPE_PEM, key, "AES-256-CBC", passphrase
        )
        with pytest.raises(Error):
            load_privatekey(
                FILETYPE_PEM, encrypted_key_pem, truncated_passphrase
            )

    def test_load_privatekey_truncated(self):
        """
        `crypto.load_privatekey` should not truncate a passphrase that contains
        a null byte.
        """
        key = load_privatekey(FILETYPE_PEM, cleartextPrivateKeyPEM)
        passphrase = b"foo\x00bar"
        truncated_passphrase = passphrase.split(b"\x00", 1)[0]

        # By dumping using the truncated passphrase load should raise an error
        # if we try to load using the full passphrase. If load truncated the
        # passphrase, then we WILL load the privatekey and the test fails
        encrypted_key_pem = dump_privatekey(
            FILETYPE_PEM, key, "AES-256-CBC", truncated_passphrase
        )
        with pytest.raises(Error):
            load_privatekey(FILETYPE_PEM, encrypted_key_pem, passphrase)


class TestLoadCertificate:
    """
    Tests for `load_certificate_request`.
    """

    def test_bad_file_type(self):
        """
        If the file type passed to `load_certificate_request` is neither
        `FILETYPE_PEM` nor `FILETYPE_ASN1` then `ValueError` is raised.
        """
        with pytest.raises(ValueError):
            load_certificate_request(object(), b"")
        with pytest.raises(ValueError):
            load_certificate(object(), b"")

    def test_bad_certificate(self):
        """
        If the bytes passed to `load_certificate` are not a valid certificate,
        an exception is raised.
        """
        with pytest.raises(Error):
            load_certificate(FILETYPE_ASN1, b"lol")


class TestRevoked:
    """
    Tests for `OpenSSL.crypto.Revoked`.
    """

    def test_ignores_unsupported_revoked_cert_extension_get_reason(self):
        """
        The get_reason method on the Revoked class checks to see if the
        extension is NID_crl_reason and should skip it otherwise. This test
        loads a CRL with extensions it should ignore.
        """
        crl = load_crl(FILETYPE_PEM, crlDataUnsupportedExtension)
        revoked = crl.get_revoked()
        reason = revoked[1].get_reason()
        assert reason == b"Unspecified"

    def test_ignores_unsupported_revoked_cert_extension_set_new_reason(self):
        crl = load_crl(FILETYPE_PEM, crlDataUnsupportedExtension)
        revoked = crl.get_revoked()
        revoked[1].set_reason(None)
        reason = revoked[1].get_reason()
        assert reason is None

    def test_construction(self):
        """
        Confirm we can create `OpenSSL.crypto.Revoked`.  Check that it is
        empty.
        """
        revoked = Revoked()
        assert isinstance(revoked, Revoked)
        assert type(revoked) is Revoked
        assert revoked.get_serial() == b"00"
        assert revoked.get_rev_date() is None
        assert revoked.get_reason() is None

    def test_serial(self):
        """
        Confirm we can set and get serial numbers from
        `OpenSSL.crypto.Revoked`.  Confirm errors are handled with grace.
        """
        revoked = Revoked()
        ret = revoked.set_serial(b"10b")
        assert ret is None
        ser = revoked.get_serial()
        assert ser == b"010B"

        revoked.set_serial(b"31ppp")  # a type error would be nice
        ser = revoked.get_serial()
        assert ser == b"31"

        with pytest.raises(ValueError):
            revoked.set_serial(b"pqrst")
        with pytest.raises(TypeError):
            revoked.set_serial(100)

    def test_date(self):
        """
        Confirm we can set and get revocation dates from
        `OpenSSL.crypto.Revoked`.  Confirm errors are handled with grace.
        """
        revoked = Revoked()
        date = revoked.get_rev_date()
        assert date is None

        now = datetime.now().strftime("%Y%m%d%H%M%SZ").encode("ascii")
        ret = revoked.set_rev_date(now)
        assert ret is None
        date = revoked.get_rev_date()
        assert date == now

    def test_reason(self):
        """
        Confirm we can set and get revocation reasons from
        `OpenSSL.crypto.Revoked`.  The "get" need to work as "set".
        Likewise, each reason of all_reasons() must work.
        """
        revoked = Revoked()
        for r in revoked.all_reasons():
            for x in range(2):
                ret = revoked.set_reason(r)
                assert ret is None
                reason = revoked.get_reason()
                assert reason.lower().replace(b" ", b"") == r.lower().replace(
                    b" ", b""
                )
                r = reason  # again with the resp of get

        revoked.set_reason(None)
        assert revoked.get_reason() is None

    @pytest.mark.parametrize("reason", [object(), 1.0, "foo"])
    def test_set_reason_wrong_args(self, reason):
        """
        `Revoked.set_reason` raises `TypeError` if called with an argument
        which is neither `None` nor a byte string.
        """
        revoked = Revoked()
        with pytest.raises(TypeError):
            revoked.set_reason(reason)

    def test_set_reason_invalid_reason(self):
        """
        Calling `OpenSSL.crypto.Revoked.set_reason` with an argument which
        isn't a valid reason results in `ValueError` being raised.
        """
        revoked = Revoked()
        with pytest.raises(ValueError):
            revoked.set_reason(b"blue")


class TestCRL:
    """
    Tests for `OpenSSL.crypto.CRL`.
    """

    cert = load_certificate(FILETYPE_PEM, root_cert_pem)
    pkey = load_privatekey(FILETYPE_PEM, root_key_pem)

    root_cert = load_certificate(FILETYPE_PEM, root_cert_pem)
    root_key = load_privatekey(FILETYPE_PEM, root_key_pem)
    intermediate_cert = load_certificate(FILETYPE_PEM, intermediate_cert_pem)
    intermediate_key = load_privatekey(FILETYPE_PEM, intermediate_key_pem)
    intermediate_server_cert = load_certificate(
        FILETYPE_PEM, intermediate_server_cert_pem
    )
    intermediate_server_key = load_privatekey(
        FILETYPE_PEM, intermediate_server_key_pem
    )

    def test_construction(self):
        """
        Confirm we can create `OpenSSL.crypto.CRL`.  Check
        that it is empty
        """
        crl = CRL()
        assert isinstance(crl, CRL)
        assert crl.get_revoked() is None

    def _get_crl(self):
        """
        Get a new ``CRL`` with a revocation.
        """
        crl = CRL()
        revoked = Revoked()
        now = datetime.now().strftime("%Y%m%d%H%M%SZ").encode("ascii")
        revoked.set_rev_date(now)
        revoked.set_serial(b"3ab")
        revoked.set_reason(b"sUpErSeDEd")
        crl.add_revoked(revoked)
        return crl

    def test_export_pem(self):
        """
        If not passed a format, ``CRL.export`` returns a "PEM" format string
        representing a serial number, a revoked reason, and certificate issuer
        information.
        """
        # PEM format
        dumped_crl = self._get_crl().export(
            self.cert, self.pkey, days=20, digest=b"sha256"
        )
        crl = x509.load_pem_x509_crl(dumped_crl)
        revoked = crl.get_revoked_certificate_by_serial_number(0x03AB)
        assert revoked is not None
        assert crl.issuer == x509.Name(
            [
                x509.NameAttribute(x509.NameOID.COUNTRY_NAME, "US"),
                x509.NameAttribute(x509.NameOID.STATE_OR_PROVINCE_NAME, "IL"),
                x509.NameAttribute(x509.NameOID.LOCALITY_NAME, "Chicago"),
                x509.NameAttribute(x509.NameOID.ORGANIZATION_NAME, "Testing"),
                x509.NameAttribute(
                    x509.NameOID.COMMON_NAME, "Testing Root CA"
                ),
            ]
        )

    def test_export_der(self):
        """
        If passed ``FILETYPE_ASN1`` for the format, ``CRL.export`` returns a
        "DER" format string representing a serial number, a revoked reason, and
        certificate issuer information.
        """
        crl = self._get_crl()

        # DER format
        dumped_crl = self._get_crl().export(
            self.cert, self.pkey, FILETYPE_ASN1, digest=b"sha256"
        )
        crl = x509.load_der_x509_crl(dumped_crl)
        revoked = crl.get_revoked_certificate_by_serial_number(0x03AB)
        assert revoked is not None
        assert crl.issuer == x509.Name(
            [
                x509.NameAttribute(x509.NameOID.COUNTRY_NAME, "US"),
                x509.NameAttribute(x509.NameOID.STATE_OR_PROVINCE_NAME, "IL"),
                x509.NameAttribute(x509.NameOID.LOCALITY_NAME, "Chicago"),
                x509.NameAttribute(x509.NameOID.ORGANIZATION_NAME, "Testing"),
                x509.NameAttribute(
                    x509.NameOID.COMMON_NAME, "Testing Root CA"
                ),
            ]
        )

    def test_export_text(self):
        """
        If passed ``FILETYPE_TEXT`` for the format, ``CRL.export`` returns a
        text format string like the one produced by the openssl command line
        tool.
        """
        crl = self._get_crl()

        # text format
        dumped_text = crl.export(
            self.cert, self.pkey, type=FILETYPE_TEXT, digest=b"sha256"
        )
        assert len(dumped_text) > 500

    def test_export_custom_digest(self):
        """
        If passed the name of a digest function, ``CRL.export`` uses a
        signature algorithm based on that digest function.
        """
        crl = self._get_crl()
        dumped_crl = crl.export(self.cert, self.pkey, digest=b"sha384")
        text = _runopenssl(dumped_crl, b"crl", b"-noout", b"-text")
        text.index(b"Signature Algorithm: sha384")

    def test_export_md5_digest(self):
        """
        If passed md5 as the digest function, ``CRL.export`` uses md5 and does
        not emit a deprecation warning.
        """
        crl = self._get_crl()
        with warnings.catch_warnings(record=True) as catcher:
            warnings.simplefilter("always")
        assert 0 == len(catcher)
        dumped_crl = crl.export(self.cert, self.pkey, digest=b"md5")
        text = _runopenssl(dumped_crl, b"crl", b"-noout", b"-text")
        text.index(b"Signature Algorithm: md5")

    def test_export_default_digest(self):
        """
        If not passed the name of a digest function, ``CRL.export`` raises a
        ``TypeError``.
        """
        crl = self._get_crl()
        with pytest.raises(TypeError):
            crl.export(self.cert, self.pkey)

    def test_export_invalid(self):
        """
        If `CRL.export` is used with an uninitialized `X509` instance,
        `OpenSSL.crypto.Error` is raised.
        """
        crl = CRL()
        with pytest.raises(Error):
            crl.export(X509(), PKey(), digest=b"sha256")

    def test_add_revoked_keyword(self):
        """
        `OpenSSL.CRL.add_revoked` accepts its single argument as the
        ``revoked`` keyword argument.
        """
        crl = CRL()
        revoked = Revoked()
        revoked.set_serial(b"01")
        revoked.set_rev_date(b"20160310020145Z")
        crl.add_revoked(revoked=revoked)
        assert isinstance(crl.get_revoked()[0], Revoked)

    def test_export_wrong_args(self):
        """
        Calling `OpenSSL.CRL.export` with arguments other than the certificate,
        private key, integer file type, and integer number of days it
        expects, results in a `TypeError` being raised.
        """
        crl = CRL()
        with pytest.raises(TypeError):
            crl.export(None, self.pkey, FILETYPE_PEM, 10)
        with pytest.raises(TypeError):
            crl.export(self.cert, None, FILETYPE_PEM, 10)
        with pytest.raises(TypeError):
            crl.export(self.cert, self.pkey, None, 10)
        with pytest.raises(TypeError):
            crl.export(self.cert, FILETYPE_PEM, None)

    def test_export_unknown_filetype(self):
        """
        Calling `OpenSSL.CRL.export` with a file type other than
        `FILETYPE_PEM`, `FILETYPE_ASN1`, or
        `FILETYPE_TEXT` results in a `ValueError` being raised.
        """
        crl = CRL()
        with pytest.raises(ValueError):
            crl.export(self.cert, self.pkey, 100, 10, digest=b"sha256")

    def test_export_unknown_digest(self):
        """
        Calling `OpenSSL.CRL.export` with an unsupported digest results
        in a `ValueError` being raised.
        """
        crl = CRL()
        with pytest.raises(ValueError):
            crl.export(
                self.cert, self.pkey, FILETYPE_PEM, 10, b"strange-digest"
            )

    def test_get_revoked(self):
        """
        Use python to create a simple CRL with two revocations. Get back the
        `Revoked` using `OpenSSL.CRL.get_revoked` and verify them.
        """
        crl = CRL()

        revoked = Revoked()
        now = datetime.now().strftime("%Y%m%d%H%M%SZ").encode("ascii")
        revoked.set_rev_date(now)
        revoked.set_serial(b"3ab")
        crl.add_revoked(revoked)
        revoked.set_serial(b"100")
        revoked.set_reason(b"sUpErSeDEd")
        crl.add_revoked(revoked)

        revs = crl.get_revoked()
        assert len(revs) == 2
        assert type(revs[0]) is Revoked
        assert type(revs[1]) is Revoked
        assert revs[0].get_serial() == b"03AB"
        assert revs[1].get_serial() == b"0100"
        assert revs[0].get_rev_date() == now
        assert revs[1].get_rev_date() == now

    def test_load_crl(self):
        """
        Load a known CRL and inspect its revocations.  Both EM and DER formats
        are loaded.
        """
        crl = load_crl(FILETYPE_PEM, crlData)
        revs = crl.get_revoked()
        assert len(revs) == 2
        assert revs[0].get_serial() == b"03AB"
        assert revs[0].get_reason() is None
        assert revs[1].get_serial() == b"0100"
        assert revs[1].get_reason() == b"Superseded"

        der = _runopenssl(crlData, b"crl", b"-outform", b"DER")
        crl = load_crl(FILETYPE_ASN1, der)
        revs = crl.get_revoked()
        assert len(revs) == 2
        assert revs[0].get_serial() == b"03AB"
        assert revs[0].get_reason() is None
        assert revs[1].get_serial() == b"0100"
        assert revs[1].get_reason() == b"Superseded"

    def test_load_crl_bad_filetype(self):
        """
        Calling `OpenSSL.crypto.load_crl` with an unknown file type raises a
        `ValueError`.
        """
        with pytest.raises(ValueError):
            load_crl(100, crlData)

    def test_load_crl_bad_data(self):
        """
        Calling `OpenSSL.crypto.load_crl` with file data which can't be loaded
        raises a `OpenSSL.crypto.Error`.
        """
        with pytest.raises(Error):
            load_crl(FILETYPE_PEM, b"hello, world")

    def test_get_issuer(self):
        """
        Load a known CRL and assert its issuer's common name is what we expect
        from the encoded crlData string.
        """
        crl = load_crl(FILETYPE_PEM, crlData)
        assert isinstance(crl.get_issuer(), X509Name)
        assert crl.get_issuer().CN == "Testing Root CA"

    def test_dump_crl(self):
        """
        The dumped CRL matches the original input.
        """
        crl = load_crl(FILETYPE_PEM, crlData)
        buf = dump_crl(FILETYPE_PEM, crl)
        assert buf == crlData

    @staticmethod
    def _make_test_crl(issuer_cert, issuer_key, certs=()):
        """
        Create a CRL.

        :param list[X509] certs: A list of certificates to revoke.
        :rtype: CRL
        """
        crl = CRL()
        for cert in certs:
            revoked = Revoked()
            # FIXME: This string splicing is an unfortunate implementation
            # detail that has been reported in
            # https://github.com/pyca/pyopenssl/issues/258
            serial = hex(cert.get_serial_number())[2:].encode("utf-8")
            revoked.set_serial(serial)
            revoked.set_reason(b"unspecified")
            revoked.set_rev_date(b"20140601000000Z")
            crl.add_revoked(revoked)
        crl.set_version(1)
        crl.set_lastUpdate(b"20140601000000Z")
        # The year 5000 is far into the future so that this CRL isn't
        # considered to have expired.
        crl.set_nextUpdate(b"50000601000000Z")
        crl.sign(issuer_cert, issuer_key, digest=b"sha512")
        return crl

    @staticmethod
    def _make_test_crl_cryptography(issuer_cert, issuer_key, certs=()):
        """
        Create a CRL using cryptography's API.

        :param list[X509] certs: A list of certificates to revoke.
        :rtype: ``cryptography.x509.CertificateRevocationList``
        """
        from cryptography.x509.extensions import CRLReason, ReasonFlags

        builder = x509.CertificateRevocationListBuilder()
        builder = builder.issuer_name(
            X509.to_cryptography(issuer_cert).subject
        )
        for cert in certs:
            revoked = (
                x509.RevokedCertificateBuilder()
                .serial_number(cert.get_serial_number())
                .revocation_date(datetime(2014, 6, 1, 0, 0, 0))
                .add_extension(CRLReason(ReasonFlags.unspecified), False)
                .build()
            )
            builder = builder.add_revoked_certificate(revoked)

        builder = builder.last_update(datetime(2014, 6, 1, 0, 0, 0))
        # The year 5000 is far into the future so that this CRL isn't
        # considered to have expired.
        builder = builder.next_update(datetime(5000, 6, 1, 0, 0, 0))

        crl = builder.sign(
            private_key=PKey.to_cryptography_key(issuer_key),
            algorithm=hashes.SHA512(),
        )
        return crl

    @pytest.mark.parametrize(
        "create_crl",
        [
            pytest.param(
                _make_test_crl.__func__,
                id="pyOpenSSL CRL",
            ),
            pytest.param(
                _make_test_crl_cryptography.__func__,
                id="cryptography CRL",
            ),
        ],
    )
    def test_verify_with_revoked(self, create_crl):
        """
        `verify_certificate` raises error when an intermediate certificate is
        revoked.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        store.add_cert(self.intermediate_cert)
        root_crl = create_crl(
            self.root_cert, self.root_key, certs=[self.intermediate_cert]
        )
        intermediate_crl = create_crl(
            self.intermediate_cert, self.intermediate_key, certs=[]
        )
        store.add_crl(root_crl)
        store.add_crl(intermediate_crl)
        store.set_flags(
            X509StoreFlags.CRL_CHECK | X509StoreFlags.CRL_CHECK_ALL
        )
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        with pytest.raises(X509StoreContextError) as err:
            store_ctx.verify_certificate()
        assert str(err.value) == "certificate revoked"

    @pytest.mark.parametrize(
        "create_crl",
        [
            pytest.param(
                _make_test_crl.__func__,
                id="pyOpenSSL CRL",
            ),
            pytest.param(
                _make_test_crl_cryptography.__func__,
                id="cryptography CRL",
            ),
        ],
    )
    def test_verify_with_missing_crl(self, create_crl):
        """
        `verify_certificate` raises error when an intermediate certificate's
        CRL is missing.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        store.add_cert(self.intermediate_cert)
        root_crl = create_crl(
            self.root_cert, self.root_key, certs=[self.intermediate_cert]
        )
        store.add_crl(root_crl)
        store.set_flags(
            X509StoreFlags.CRL_CHECK | X509StoreFlags.CRL_CHECK_ALL
        )
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        with pytest.raises(X509StoreContextError) as err:
            store_ctx.verify_certificate()
        assert str(err.value) == "unable to get certificate CRL"
        assert err.value.certificate.get_subject().CN == "intermediate-service"

    def test_convert_from_cryptography(self):
        crypto_crl = x509.load_pem_x509_crl(crlData)
        crl = CRL.from_cryptography(crypto_crl)
        assert isinstance(crl, CRL)

    def test_convert_from_cryptography_unsupported_type(self):
        with pytest.raises(TypeError):
            CRL.from_cryptography(object())

    def test_convert_to_cryptography_key(self):
        crl = load_crl(FILETYPE_PEM, crlData)
        crypto_crl = crl.to_cryptography()
        assert isinstance(crypto_crl, x509.CertificateRevocationList)


class TestX509StoreContext:
    """
    Tests for `OpenSSL.crypto.X509StoreContext`.
    """

    root_cert = load_certificate(FILETYPE_PEM, root_cert_pem)
    intermediate_cert = load_certificate(FILETYPE_PEM, intermediate_cert_pem)
    intermediate_server_cert = load_certificate(
        FILETYPE_PEM, intermediate_server_cert_pem
    )

    def test_valid(self):
        """
        `verify_certificate` returns ``None`` when called with a certificate
        and valid chain.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        store.add_cert(self.intermediate_cert)
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        assert store_ctx.verify_certificate() is None

    def test_reuse(self):
        """
        `verify_certificate` can be called multiple times with the same
        ``X509StoreContext`` instance to produce the same result.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        store.add_cert(self.intermediate_cert)
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        assert store_ctx.verify_certificate() is None
        assert store_ctx.verify_certificate() is None

    @pytest.mark.parametrize(
        "root_cert, chain, verified_cert",
        [
            pytest.param(
                root_cert,
                [intermediate_cert],
                intermediate_server_cert,
                id="intermediate in chain",
            ),
            pytest.param(
                root_cert,
                [],
                intermediate_cert,
                id="empty chain",
            ),
            pytest.param(
                root_cert,
                [root_cert, intermediate_server_cert, intermediate_cert],
                intermediate_server_cert,
                id="extra certs in chain",
            ),
        ],
    )
    def test_verify_success_with_chain(self, root_cert, chain, verified_cert):
        store = X509Store()
        store.add_cert(root_cert)
        store_ctx = X509StoreContext(store, verified_cert, chain=chain)
        assert store_ctx.verify_certificate() is None

    def test_valid_untrusted_chain_reuse(self):
        """
        `verify_certificate` using an untrusted chain can be called multiple
        times with the same ``X509StoreContext`` instance to produce the same
        result.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        chain = [self.intermediate_cert]

        store_ctx = X509StoreContext(
            store, self.intermediate_server_cert, chain=chain
        )
        assert store_ctx.verify_certificate() is None
        assert store_ctx.verify_certificate() is None

    def test_chain_reference(self):
        """
        ``X509StoreContext`` properly keeps references to the untrusted chain
        certificates.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        chain = [load_certificate(FILETYPE_PEM, intermediate_cert_pem)]

        store_ctx = X509StoreContext(
            store, self.intermediate_server_cert, chain=chain
        )

        del chain
        assert store_ctx.verify_certificate() is None

    @pytest.mark.parametrize(
        "root_cert, chain, verified_cert",
        [
            pytest.param(
                root_cert,
                [],
                intermediate_server_cert,
                id="intermediate missing",
            ),
            pytest.param(
                None,
                [intermediate_cert],
                intermediate_server_cert,
                id="no trusted root",
            ),
            pytest.param(
                None,
                [root_cert, intermediate_cert],
                intermediate_server_cert,
                id="untrusted root, full chain is available",
            ),
            pytest.param(
                intermediate_cert,
                [root_cert, intermediate_cert],
                intermediate_server_cert,
                id="untrusted root, intermediate is trusted and in chain",
            ),
        ],
    )
    def test_verify_fail_with_chain(self, root_cert, chain, verified_cert):
        store = X509Store()
        if root_cert:
            store.add_cert(root_cert)

        store_ctx = X509StoreContext(store, verified_cert, chain=chain)

        with pytest.raises(X509StoreContextError):
            store_ctx.verify_certificate()

    @pytest.mark.parametrize(
        "chain, expected_error",
        [
            pytest.param(
                [intermediate_cert, "This is not a certificate"],
                TypeError,
                id="non-certificate in chain",
            ),
            pytest.param(
                42,
                TypeError,
                id="non-list chain",
            ),
        ],
    )
    def test_untrusted_chain_wrong_args(self, chain, expected_error):
        """
        Creating ``X509StoreContext`` with wrong chain raises an exception.
        """
        store = X509Store()
        store.add_cert(self.root_cert)

        with pytest.raises(expected_error):
            X509StoreContext(store, self.intermediate_server_cert, chain=chain)

    def test_failure_building_untrusted_chain_raises(self, monkeypatch):
        """
        Creating ``X509StoreContext`` raises ``OpenSSL.crypto.Error`` when
        the underlying lib fails to add the certificate to the stack.
        """
        monkeypatch.setattr(_lib, "sk_X509_push", lambda _stack, _x509: -1)

        store = X509Store()
        store.add_cert(self.root_cert)
        chain = [self.intermediate_cert]

        with pytest.raises(Error):
            X509StoreContext(store, self.intermediate_server_cert, chain=chain)

    def test_trusted_self_signed(self):
        """
        `verify_certificate` returns ``None`` when called with a self-signed
        certificate and itself in the chain.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        store_ctx = X509StoreContext(store, self.root_cert)
        assert store_ctx.verify_certificate() is None

    def test_untrusted_self_signed(self):
        """
        `verify_certificate` raises error when a self-signed certificate is
        verified without itself in the chain.
        """
        store = X509Store()
        store_ctx = X509StoreContext(store, self.root_cert)
        with pytest.raises(X509StoreContextError) as exc:
            store_ctx.verify_certificate()

        # OpenSSL 1.1.x and 3.0.x have different error messages
        assert str(exc.value) in [
            "self signed certificate",
            "self-signed certificate",
        ]
        assert exc.value.certificate.get_subject().CN == "Testing Root CA"

    def test_invalid_chain_no_root(self):
        """
        `verify_certificate` raises error when a root certificate is missing
        from the chain.
        """
        store = X509Store()
        store.add_cert(self.intermediate_cert)
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)

        with pytest.raises(X509StoreContextError) as exc:
            store_ctx.verify_certificate()

        assert str(exc.value) == "unable to get issuer certificate"
        assert exc.value.certificate.get_subject().CN == "intermediate"

    def test_invalid_chain_no_intermediate(self):
        """
        `verify_certificate` raises error when an intermediate certificate is
        missing from the chain.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)

        with pytest.raises(X509StoreContextError) as exc:
            store_ctx.verify_certificate()

        assert str(exc.value) == "unable to get local issuer certificate"
        assert exc.value.certificate.get_subject().CN == "intermediate-service"

    def test_modification_pre_verify(self):
        """
        `verify_certificate` can use a store context modified after
        instantiation.
        """
        store_bad = X509Store()
        store_bad.add_cert(self.intermediate_cert)
        store_good = X509Store()
        store_good.add_cert(self.root_cert)
        store_good.add_cert(self.intermediate_cert)
        store_ctx = X509StoreContext(store_bad, self.intermediate_server_cert)

        with pytest.raises(X509StoreContextError) as exc:
            store_ctx.verify_certificate()

        assert str(exc.value) == "unable to get issuer certificate"
        assert exc.value.certificate.get_subject().CN == "intermediate"

        store_ctx.set_store(store_good)
        assert store_ctx.verify_certificate() is None

    def test_verify_with_time(self):
        """
        `verify_certificate` raises error when the verification time is
        set at notAfter.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        store.add_cert(self.intermediate_cert)

        expire_time = self.intermediate_server_cert.get_notAfter()
        expire_datetime = datetime.strptime(
            expire_time.decode("utf-8"), "%Y%m%d%H%M%SZ"
        )
        store.set_time(expire_datetime)

        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        with pytest.raises(X509StoreContextError) as exc:
            store_ctx.verify_certificate()

        assert str(exc.value) == "certificate has expired"

    def test_get_verified_chain(self):
        """
        `get_verified_chain` returns the verified chain.
        """
        store = X509Store()
        store.add_cert(self.root_cert)
        store.add_cert(self.intermediate_cert)
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        chain = store_ctx.get_verified_chain()
        assert len(chain) == 3
        intermediate_subject = self.intermediate_server_cert.get_subject()
        assert chain[0].get_subject() == intermediate_subject
        assert chain[1].get_subject() == self.intermediate_cert.get_subject()
        assert chain[2].get_subject() == self.root_cert.get_subject()
        # Test reuse
        chain = store_ctx.get_verified_chain()
        assert len(chain) == 3
        assert chain[0].get_subject() == intermediate_subject
        assert chain[1].get_subject() == self.intermediate_cert.get_subject()
        assert chain[2].get_subject() == self.root_cert.get_subject()

    def test_get_verified_chain_invalid_chain_no_root(self):
        """
        `get_verified_chain` raises error when cert verification fails.
        """
        store = X509Store()
        store.add_cert(self.intermediate_cert)
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)

        with pytest.raises(X509StoreContextError) as exc:
            store_ctx.get_verified_chain()

        assert str(exc.value) == "unable to get issuer certificate"
        assert exc.value.certificate.get_subject().CN == "intermediate"

    @pytest.fixture
    def root_ca_file(self, tmpdir):
        return self._create_ca_file(tmpdir, "root_ca_hash_dir", self.root_cert)

    @pytest.fixture
    def intermediate_ca_file(self, tmpdir):
        return self._create_ca_file(
            tmpdir, "intermediate_ca_hash_dir", self.intermediate_cert
        )

    @staticmethod
    def _create_ca_file(base_path, hash_directory, cacert):
        ca_hash = f"{cacert.subject_name_hash():08x}.0"
        cafile = base_path.join(hash_directory, ca_hash)
        cafile.write_binary(
            dump_certificate(FILETYPE_PEM, cacert), ensure=True
        )
        return cafile

    def test_verify_with_ca_file_location(self, root_ca_file):
        store = X509Store()
        store.load_locations(str(root_ca_file))

        store_ctx = X509StoreContext(store, self.intermediate_cert)
        store_ctx.verify_certificate()

    def test_verify_with_ca_path_location(self, root_ca_file):
        store = X509Store()
        store.load_locations(None, str(root_ca_file.dirname))

        store_ctx = X509StoreContext(store, self.intermediate_cert)
        store_ctx.verify_certificate()

    def test_verify_with_cafile_and_capath(
        self, root_ca_file, intermediate_ca_file
    ):
        store = X509Store()
        store.load_locations(
            cafile=str(root_ca_file), capath=str(intermediate_ca_file.dirname)
        )

        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        store_ctx.verify_certificate()

    def test_verify_with_multiple_ca_files(
        self, root_ca_file, intermediate_ca_file
    ):
        store = X509Store()
        store.load_locations(str(root_ca_file))
        store.load_locations(str(intermediate_ca_file))

        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        store_ctx.verify_certificate()

    def test_verify_failure_with_empty_ca_directory(self, tmpdir):
        store = X509Store()
        store.load_locations(None, str(tmpdir))

        store_ctx = X509StoreContext(store, self.intermediate_cert)
        with pytest.raises(X509StoreContextError) as exc:
            store_ctx.verify_certificate()

        assert str(exc.value) == "unable to get local issuer certificate"

    def test_verify_with_partial_chain(self):
        store = X509Store()
        store.add_cert(self.intermediate_cert)

        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        with pytest.raises(X509StoreContextError):
            store_ctx.verify_certificate()

        # Now set the partial verification flag for verification.
        store.set_flags(X509StoreFlags.PARTIAL_CHAIN)
        store_ctx = X509StoreContext(store, self.intermediate_server_cert)
        assert store_ctx.verify_certificate() is None


class TestSignVerify:
    """
    Tests for `OpenSSL.crypto.sign` and `OpenSSL.crypto.verify`.
    """

    def test_sign_verify(self):
        """
        `sign` generates a cryptographic signature which `verify` can check.
        """
        content = (
            b"It was a bright cold day in April, and the clocks were striking "
            b"thirteen. Winston Smith, his chin nuzzled into his breast in an "
            b"effort to escape the vile wind, slipped quickly through the "
            b"glass doors of Victory Mansions, though not quickly enough to "
            b"prevent a swirl of gritty dust from entering along with him."
        )

        # sign the content with this private key
        priv_key = load_privatekey(FILETYPE_PEM, root_key_pem)
        # verify the content with this cert
        good_cert = load_certificate(FILETYPE_PEM, root_cert_pem)
        # certificate unrelated to priv_key, used to trigger an error
        bad_cert = load_certificate(FILETYPE_PEM, server_cert_pem)

        for digest in ["md5", "sha1", "sha256"]:
            sig = sign(priv_key, content, digest)

            # Verify the signature of content, will throw an exception if
            # error.
            verify(good_cert, sig, content, digest)

            # This should fail because the certificate doesn't match the
            # private key that was used to sign the content.
            with pytest.raises(Error):
                verify(bad_cert, sig, content, digest)

            # This should fail because we've "tainted" the content after
            # signing it.
            with pytest.raises(Error):
                verify(good_cert, sig, content + b"tainted", digest)

        # test that unknown digest types fail
        with pytest.raises(ValueError):
            sign(priv_key, content, "strange-digest")
        with pytest.raises(ValueError):
            verify(good_cert, sig, content, "strange-digest")

    def test_sign_verify_with_text(self):
        """
        `sign` generates a cryptographic signature which
        `verify` can check. Deprecation warnings raised because using
        text instead of bytes as content
        """
        content = (
            b"It was a bright cold day in April, and the clocks were striking "
            b"thirteen. Winston Smith, his chin nuzzled into his breast in an "
            b"effort to escape the vile wind, slipped quickly through the "
            b"glass doors of Victory Mansions, though not quickly enough to "
            b"prevent a swirl of gritty dust from entering along with him."
        ).decode("ascii")

        priv_key = load_privatekey(FILETYPE_PEM, root_key_pem)
        cert = load_certificate(FILETYPE_PEM, root_cert_pem)
        for digest in ["md5", "sha1", "sha256"]:
            with pytest.warns(DeprecationWarning) as w:
                warnings.simplefilter("always")
                sig = sign(priv_key, content, digest)
            assert (
                f"{WARNING_TYPE_EXPECTED} for data is no longer accepted, "
                f"use bytes"
            ) == str(w[-1].message)

            with pytest.warns(DeprecationWarning) as w:
                warnings.simplefilter("always")
                verify(cert, sig, content, digest)
            assert (
                f"{WARNING_TYPE_EXPECTED} for data is no longer accepted, "
                f"use bytes"
            ) == str(w[-1].message)

    def test_sign_verify_ecdsa(self):
        """
        `sign` generates a cryptographic signature which `verify` can check.
        ECDSA Signatures in the X9.62 format may have variable length,
        different from the length of the private key.
        """
        content = (
            b"It was a bright cold day in April, and the clocks were striking "
            b"thirteen. Winston Smith, his chin nuzzled into his breast in an "
            b"effort to escape the vile wind, slipped quickly through the "
            b"glass doors of Victory Mansions, though not quickly enough to "
            b"prevent a swirl of gritty dust from entering along with him."
        )
        priv_key = load_privatekey(FILETYPE_PEM, ec_root_key_pem)
        cert = load_certificate(FILETYPE_PEM, ec_root_cert_pem)
        sig = sign(priv_key, content, "sha256")
        verify(cert, sig, content, "sha256")

    def test_sign_nulls(self):
        """
        `sign` produces a signature for a string with embedded nulls.
        """
        content = b"Watch out!  \0  Did you see it?"
        priv_key = load_privatekey(FILETYPE_PEM, root_key_pem)
        good_cert = load_certificate(FILETYPE_PEM, root_cert_pem)
        sig = sign(priv_key, content, "sha256")
        verify(good_cert, sig, content, "sha256")

    def test_sign_with_large_key(self):
        """
        `sign` produces a signature for a string when using a long key.
        """
        content = (
            b"It was a bright cold day in April, and the clocks were striking "
            b"thirteen. Winston Smith, his chin nuzzled into his breast in an "
            b"effort to escape the vile wind, slipped quickly through the "
            b"glass doors of Victory Mansions, though not quickly enough to "
            b"prevent a swirl of gritty dust from entering along with him."
        )

        priv_key = load_privatekey(FILETYPE_PEM, large_key_pem)
        sign(priv_key, content, "sha256")


class TestEllipticCurve:
    """
    Tests for `_EllipticCurve`, `get_elliptic_curve`, and
    `get_elliptic_curves`.
    """

    def test_set(self):
        """
        `get_elliptic_curves` returns a `set`.
        """
        assert isinstance(get_elliptic_curves(), set)

    def test_a_curve(self):
        """
        `get_elliptic_curve` can be used to retrieve a particular supported
        curve.
        """
        curves = get_elliptic_curves()
        curve = next(iter(curves))
        assert curve.name == get_elliptic_curve(curve.name).name

    def test_not_a_curve(self):
        """
        `get_elliptic_curve` raises `ValueError` if called with a name which
        does not identify a supported curve.
        """
        with pytest.raises(ValueError):
            get_elliptic_curve("this curve was just invented")

    def test_repr(self):
        """
        The string representation of a curve object includes simply states the
        object is a curve and what its name is.
        """
        curves = get_elliptic_curves()
        curve = next(iter(curves))
        assert f"<Curve {curve.name!r}>" == repr(curve)

    def test_to_EC_KEY(self):
        """
        The curve object can export a version of itself as an EC_KEY* via the
        private `_EllipticCurve._to_EC_KEY`.
        """
        curves = get_elliptic_curves()
        curve = next(iter(curves))
        # It's not easy to assert anything about this object.  However, see
        # leakcheck/crypto.py for a test that demonstrates it at least does
        # not leak memory.
        curve._to_EC_KEY()


class EllipticCurveFactory:
    """
    A helper to get the names of two curves.
    """

    def __init__(self):
        curves = iter(get_elliptic_curves())
        self.curve_name = next(curves).name
        self.another_curve_name = next(curves).name


class TestEllipticCurveEquality(EqualityTestsMixin):
    """
    Tests `_EllipticCurve`'s implementation of ``==`` and ``!=``.
    """

    curve_factory = EllipticCurveFactory()

    if curve_factory.curve_name is None:
        skip = "There are no curves available there can be no curve objects."

    def anInstance(self):
        """
        Get the curve object for an arbitrary curve supported by the system.
        """
        return get_elliptic_curve(self.curve_factory.curve_name)

    def anotherInstance(self):
        """
        Get the curve object for an arbitrary curve supported by the system -
        but not the one returned by C{anInstance}.
        """
        return get_elliptic_curve(self.curve_factory.another_curve_name)


class TestEllipticCurveHash:
    """
    Tests for `_EllipticCurve`'s implementation of hashing (thus use as
    an item in a `dict` or `set`).
    """

    curve_factory = EllipticCurveFactory()

    if curve_factory.curve_name is None:
        skip = "There are no curves available there can be no curve objects."

    def test_contains(self):
        """
        The ``in`` operator reports that a `set` containing a curve does
        contain that curve.
        """
        curve = get_elliptic_curve(self.curve_factory.curve_name)
        curves = set([curve])
        assert curve in curves

    def test_does_not_contain(self):
        """
        The ``in`` operator reports that a `set` not containing a curve
        does not contain that curve.
        """
        curve = get_elliptic_curve(self.curve_factory.curve_name)
        curves = set(
            [get_elliptic_curve(self.curve_factory.another_curve_name)]
        )
        assert curve not in curves