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libgcrypt
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libgcrypt
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master
cipher/blowfish.c
1 089 строк
35 KB
Jussi Kivilinna
blowfish: reduce CTR bulk counter carry handling to 16 bits
28 июл 2026, 11:30
28 июл 2026, 11:30
e15480f
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/* blowfish.c - Blowfish encryption * Copyright (C) 1998, 2001, 2002, 2003 Free Software Foundation, Inc. * * This file is part of Libgcrypt. * * Libgcrypt is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * Libgcrypt is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program; if not, see <https://www.gnu.org/licenses/>. * SPDX-License-Identifier: LGPL-2.1-or-later * * For a description of the algorithm, see: * Bruce Schneier: Applied Cryptography. John Wiley & Sons, 1996. * ISBN 0-471-11709-9. Pages 336 ff. */ /* Test values: * key "abcdefghijklmnopqrstuvwxyz"; * plain "BLOWFISH" * cipher 32 4E D0 FE F4 13 A2 03 * */ #include <config.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "types.h" #include "g10lib.h" #include "cipher.h" #include "bufhelp.h" #include "cipher-internal.h" #define BLOWFISH_BLOCKSIZE 8 #define BLOWFISH_KEY_MIN_BITS 8 #define BLOWFISH_KEY_MAX_BITS 576 /* USE_AMD64_ASM indicates whether to use AMD64 assembly code. */ #undef USE_AMD64_ASM #if defined(__x86_64__) && (defined(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS) || \ defined(HAVE_COMPATIBLE_GCC_WIN64_PLATFORM_AS)) # define USE_AMD64_ASM 1 #endif /* USE_ARM_ASM indicates whether to use ARM assembly code. */ #undef USE_ARM_ASM #if defined(__ARMEL__) # if defined(HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS) # define USE_ARM_ASM 1 # endif #endif typedef struct { u32 s0[256]; u32 s1[256]; u32 s2[256]; u32 s3[256]; u32 p[16+2]; } BLOWFISH_context; static gcry_err_code_t bf_setkey (void *c, const byte *key, unsigned keylen, cipher_bulk_ops_t *bulk_ops); static unsigned int encrypt_block (void *bc, byte *outbuf, const byte *inbuf); static unsigned int decrypt_block (void *bc, byte *outbuf, const byte *inbuf); /* precomputed S boxes */ static const u32 ks0[256] = { 0xD1310BA6,0x98DFB5AC,0x2FFD72DB,0xD01ADFB7,0xB8E1AFED,0x6A267E96, 0xBA7C9045,0xF12C7F99,0x24A19947,0xB3916CF7,0x0801F2E2,0x858EFC16, 0x636920D8,0x71574E69,0xA458FEA3,0xF4933D7E,0x0D95748F,0x728EB658, 0x718BCD58,0x82154AEE,0x7B54A41D,0xC25A59B5,0x9C30D539,0x2AF26013, 0xC5D1B023,0x286085F0,0xCA417918,0xB8DB38EF,0x8E79DCB0,0x603A180E, 0x6C9E0E8B,0xB01E8A3E,0xD71577C1,0xBD314B27,0x78AF2FDA,0x55605C60, 0xE65525F3,0xAA55AB94,0x57489862,0x63E81440,0x55CA396A,0x2AAB10B6, 0xB4CC5C34,0x1141E8CE,0xA15486AF,0x7C72E993,0xB3EE1411,0x636FBC2A, 0x2BA9C55D,0x741831F6,0xCE5C3E16,0x9B87931E,0xAFD6BA33,0x6C24CF5C, 0x7A325381,0x28958677,0x3B8F4898,0x6B4BB9AF,0xC4BFE81B,0x66282193, 0x61D809CC,0xFB21A991,0x487CAC60,0x5DEC8032,0xEF845D5D,0xE98575B1, 0xDC262302,0xEB651B88,0x23893E81,0xD396ACC5,0x0F6D6FF3,0x83F44239, 0x2E0B4482,0xA4842004,0x69C8F04A,0x9E1F9B5E,0x21C66842,0xF6E96C9A, 0x670C9C61,0xABD388F0,0x6A51A0D2,0xD8542F68,0x960FA728,0xAB5133A3, 0x6EEF0B6C,0x137A3BE4,0xBA3BF050,0x7EFB2A98,0xA1F1651D,0x39AF0176, 0x66CA593E,0x82430E88,0x8CEE8619,0x456F9FB4,0x7D84A5C3,0x3B8B5EBE, 0xE06F75D8,0x85C12073,0x401A449F,0x56C16AA6,0x4ED3AA62,0x363F7706, 0x1BFEDF72,0x429B023D,0x37D0D724,0xD00A1248,0xDB0FEAD3,0x49F1C09B, 0x075372C9,0x80991B7B,0x25D479D8,0xF6E8DEF7,0xE3FE501A,0xB6794C3B, 0x976CE0BD,0x04C006BA,0xC1A94FB6,0x409F60C4,0x5E5C9EC2,0x196A2463, 0x68FB6FAF,0x3E6C53B5,0x1339B2EB,0x3B52EC6F,0x6DFC511F,0x9B30952C, 0xCC814544,0xAF5EBD09,0xBEE3D004,0xDE334AFD,0x660F2807,0x192E4BB3, 0xC0CBA857,0x45C8740F,0xD20B5F39,0xB9D3FBDB,0x5579C0BD,0x1A60320A, 0xD6A100C6,0x402C7279,0x679F25FE,0xFB1FA3CC,0x8EA5E9F8,0xDB3222F8, 0x3C7516DF,0xFD616B15,0x2F501EC8,0xAD0552AB,0x323DB5FA,0xFD238760, 0x53317B48,0x3E00DF82,0x9E5C57BB,0xCA6F8CA0,0x1A87562E,0xDF1769DB, 0xD542A8F6,0x287EFFC3,0xAC6732C6,0x8C4F5573,0x695B27B0,0xBBCA58C8, 0xE1FFA35D,0xB8F011A0,0x10FA3D98,0xFD2183B8,0x4AFCB56C,0x2DD1D35B, 0x9A53E479,0xB6F84565,0xD28E49BC,0x4BFB9790,0xE1DDF2DA,0xA4CB7E33, 0x62FB1341,0xCEE4C6E8,0xEF20CADA,0x36774C01,0xD07E9EFE,0x2BF11FB4, 0x95DBDA4D,0xAE909198,0xEAAD8E71,0x6B93D5A0,0xD08ED1D0,0xAFC725E0, 0x8E3C5B2F,0x8E7594B7,0x8FF6E2FB,0xF2122B64,0x8888B812,0x900DF01C, 0x4FAD5EA0,0x688FC31C,0xD1CFF191,0xB3A8C1AD,0x2F2F2218,0xBE0E1777, 0xEA752DFE,0x8B021FA1,0xE5A0CC0F,0xB56F74E8,0x18ACF3D6,0xCE89E299, 0xB4A84FE0,0xFD13E0B7,0x7CC43B81,0xD2ADA8D9,0x165FA266,0x80957705, 0x93CC7314,0x211A1477,0xE6AD2065,0x77B5FA86,0xC75442F5,0xFB9D35CF, 0xEBCDAF0C,0x7B3E89A0,0xD6411BD3,0xAE1E7E49,0x00250E2D,0x2071B35E, 0x226800BB,0x57B8E0AF,0x2464369B,0xF009B91E,0x5563911D,0x59DFA6AA, 0x78C14389,0xD95A537F,0x207D5BA2,0x02E5B9C5,0x83260376,0x6295CFA9, 0x11C81968,0x4E734A41,0xB3472DCA,0x7B14A94A,0x1B510052,0x9A532915, 0xD60F573F,0xBC9BC6E4,0x2B60A476,0x81E67400,0x08BA6FB5,0x571BE91F, 0xF296EC6B,0x2A0DD915,0xB6636521,0xE7B9F9B6,0xFF34052E,0xC5855664, 0x53B02D5D,0xA99F8FA1,0x08BA4799,0x6E85076A }; static const u32 ks1[256] = { 0x4B7A70E9,0xB5B32944,0xDB75092E,0xC4192623,0xAD6EA6B0,0x49A7DF7D, 0x9CEE60B8,0x8FEDB266,0xECAA8C71,0x699A17FF,0x5664526C,0xC2B19EE1, 0x193602A5,0x75094C29,0xA0591340,0xE4183A3E,0x3F54989A,0x5B429D65, 0x6B8FE4D6,0x99F73FD6,0xA1D29C07,0xEFE830F5,0x4D2D38E6,0xF0255DC1, 0x4CDD2086,0x8470EB26,0x6382E9C6,0x021ECC5E,0x09686B3F,0x3EBAEFC9, 0x3C971814,0x6B6A70A1,0x687F3584,0x52A0E286,0xB79C5305,0xAA500737, 0x3E07841C,0x7FDEAE5C,0x8E7D44EC,0x5716F2B8,0xB03ADA37,0xF0500C0D, 0xF01C1F04,0x0200B3FF,0xAE0CF51A,0x3CB574B2,0x25837A58,0xDC0921BD, 0xD19113F9,0x7CA92FF6,0x94324773,0x22F54701,0x3AE5E581,0x37C2DADC, 0xC8B57634,0x9AF3DDA7,0xA9446146,0x0FD0030E,0xECC8C73E,0xA4751E41, 0xE238CD99,0x3BEA0E2F,0x3280BBA1,0x183EB331,0x4E548B38,0x4F6DB908, 0x6F420D03,0xF60A04BF,0x2CB81290,0x24977C79,0x5679B072,0xBCAF89AF, 0xDE9A771F,0xD9930810,0xB38BAE12,0xDCCF3F2E,0x5512721F,0x2E6B7124, 0x501ADDE6,0x9F84CD87,0x7A584718,0x7408DA17,0xBC9F9ABC,0xE94B7D8C, 0xEC7AEC3A,0xDB851DFA,0x63094366,0xC464C3D2,0xEF1C1847,0x3215D908, 0xDD433B37,0x24C2BA16,0x12A14D43,0x2A65C451,0x50940002,0x133AE4DD, 0x71DFF89E,0x10314E55,0x81AC77D6,0x5F11199B,0x043556F1,0xD7A3C76B, 0x3C11183B,0x5924A509,0xF28FE6ED,0x97F1FBFA,0x9EBABF2C,0x1E153C6E, 0x86E34570,0xEAE96FB1,0x860E5E0A,0x5A3E2AB3,0x771FE71C,0x4E3D06FA, 0x2965DCB9,0x99E71D0F,0x803E89D6,0x5266C825,0x2E4CC978,0x9C10B36A, 0xC6150EBA,0x94E2EA78,0xA5FC3C53,0x1E0A2DF4,0xF2F74EA7,0x361D2B3D, 0x1939260F,0x19C27960,0x5223A708,0xF71312B6,0xEBADFE6E,0xEAC31F66, 0xE3BC4595,0xA67BC883,0xB17F37D1,0x018CFF28,0xC332DDEF,0xBE6C5AA5, 0x65582185,0x68AB9802,0xEECEA50F,0xDB2F953B,0x2AEF7DAD,0x5B6E2F84, 0x1521B628,0x29076170,0xECDD4775,0x619F1510,0x13CCA830,0xEB61BD96, 0x0334FE1E,0xAA0363CF,0xB5735C90,0x4C70A239,0xD59E9E0B,0xCBAADE14, 0xEECC86BC,0x60622CA7,0x9CAB5CAB,0xB2F3846E,0x648B1EAF,0x19BDF0CA, 0xA02369B9,0x655ABB50,0x40685A32,0x3C2AB4B3,0x319EE9D5,0xC021B8F7, 0x9B540B19,0x875FA099,0x95F7997E,0x623D7DA8,0xF837889A,0x97E32D77, 0x11ED935F,0x16681281,0x0E358829,0xC7E61FD6,0x96DEDFA1,0x7858BA99, 0x57F584A5,0x1B227263,0x9B83C3FF,0x1AC24696,0xCDB30AEB,0x532E3054, 0x8FD948E4,0x6DBC3128,0x58EBF2EF,0x34C6FFEA,0xFE28ED61,0xEE7C3C73, 0x5D4A14D9,0xE864B7E3,0x42105D14,0x203E13E0,0x45EEE2B6,0xA3AAABEA, 0xDB6C4F15,0xFACB4FD0,0xC742F442,0xEF6ABBB5,0x654F3B1D,0x41CD2105, 0xD81E799E,0x86854DC7,0xE44B476A,0x3D816250,0xCF62A1F2,0x5B8D2646, 0xFC8883A0,0xC1C7B6A3,0x7F1524C3,0x69CB7492,0x47848A0B,0x5692B285, 0x095BBF00,0xAD19489D,0x1462B174,0x23820E00,0x58428D2A,0x0C55F5EA, 0x1DADF43E,0x233F7061,0x3372F092,0x8D937E41,0xD65FECF1,0x6C223BDB, 0x7CDE3759,0xCBEE7460,0x4085F2A7,0xCE77326E,0xA6078084,0x19F8509E, 0xE8EFD855,0x61D99735,0xA969A7AA,0xC50C06C2,0x5A04ABFC,0x800BCADC, 0x9E447A2E,0xC3453484,0xFDD56705,0x0E1E9EC9,0xDB73DBD3,0x105588CD, 0x675FDA79,0xE3674340,0xC5C43465,0x713E38D8,0x3D28F89E,0xF16DFF20, 0x153E21E7,0x8FB03D4A,0xE6E39F2B,0xDB83ADF7 }; static const u32 ks2[256] = { 0xE93D5A68,0x948140F7,0xF64C261C,0x94692934,0x411520F7,0x7602D4F7, 0xBCF46B2E,0xD4A20068,0xD4082471,0x3320F46A,0x43B7D4B7,0x500061AF, 0x1E39F62E,0x97244546,0x14214F74,0xBF8B8840,0x4D95FC1D,0x96B591AF, 0x70F4DDD3,0x66A02F45,0xBFBC09EC,0x03BD9785,0x7FAC6DD0,0x31CB8504, 0x96EB27B3,0x55FD3941,0xDA2547E6,0xABCA0A9A,0x28507825,0x530429F4, 0x0A2C86DA,0xE9B66DFB,0x68DC1462,0xD7486900,0x680EC0A4,0x27A18DEE, 0x4F3FFEA2,0xE887AD8C,0xB58CE006,0x7AF4D6B6,0xAACE1E7C,0xD3375FEC, 0xCE78A399,0x406B2A42,0x20FE9E35,0xD9F385B9,0xEE39D7AB,0x3B124E8B, 0x1DC9FAF7,0x4B6D1856,0x26A36631,0xEAE397B2,0x3A6EFA74,0xDD5B4332, 0x6841E7F7,0xCA7820FB,0xFB0AF54E,0xD8FEB397,0x454056AC,0xBA489527, 0x55533A3A,0x20838D87,0xFE6BA9B7,0xD096954B,0x55A867BC,0xA1159A58, 0xCCA92963,0x99E1DB33,0xA62A4A56,0x3F3125F9,0x5EF47E1C,0x9029317C, 0xFDF8E802,0x04272F70,0x80BB155C,0x05282CE3,0x95C11548,0xE4C66D22, 0x48C1133F,0xC70F86DC,0x07F9C9EE,0x41041F0F,0x404779A4,0x5D886E17, 0x325F51EB,0xD59BC0D1,0xF2BCC18F,0x41113564,0x257B7834,0x602A9C60, 0xDFF8E8A3,0x1F636C1B,0x0E12B4C2,0x02E1329E,0xAF664FD1,0xCAD18115, 0x6B2395E0,0x333E92E1,0x3B240B62,0xEEBEB922,0x85B2A20E,0xE6BA0D99, 0xDE720C8C,0x2DA2F728,0xD0127845,0x95B794FD,0x647D0862,0xE7CCF5F0, 0x5449A36F,0x877D48FA,0xC39DFD27,0xF33E8D1E,0x0A476341,0x992EFF74, 0x3A6F6EAB,0xF4F8FD37,0xA812DC60,0xA1EBDDF8,0x991BE14C,0xDB6E6B0D, 0xC67B5510,0x6D672C37,0x2765D43B,0xDCD0E804,0xF1290DC7,0xCC00FFA3, 0xB5390F92,0x690FED0B,0x667B9FFB,0xCEDB7D9C,0xA091CF0B,0xD9155EA3, 0xBB132F88,0x515BAD24,0x7B9479BF,0x763BD6EB,0x37392EB3,0xCC115979, 0x8026E297,0xF42E312D,0x6842ADA7,0xC66A2B3B,0x12754CCC,0x782EF11C, 0x6A124237,0xB79251E7,0x06A1BBE6,0x4BFB6350,0x1A6B1018,0x11CAEDFA, 0x3D25BDD8,0xE2E1C3C9,0x44421659,0x0A121386,0xD90CEC6E,0xD5ABEA2A, 0x64AF674E,0xDA86A85F,0xBEBFE988,0x64E4C3FE,0x9DBC8057,0xF0F7C086, 0x60787BF8,0x6003604D,0xD1FD8346,0xF6381FB0,0x7745AE04,0xD736FCCC, 0x83426B33,0xF01EAB71,0xB0804187,0x3C005E5F,0x77A057BE,0xBDE8AE24, 0x55464299,0xBF582E61,0x4E58F48F,0xF2DDFDA2,0xF474EF38,0x8789BDC2, 0x5366F9C3,0xC8B38E74,0xB475F255,0x46FCD9B9,0x7AEB2661,0x8B1DDF84, 0x846A0E79,0x915F95E2,0x466E598E,0x20B45770,0x8CD55591,0xC902DE4C, 0xB90BACE1,0xBB8205D0,0x11A86248,0x7574A99E,0xB77F19B6,0xE0A9DC09, 0x662D09A1,0xC4324633,0xE85A1F02,0x09F0BE8C,0x4A99A025,0x1D6EFE10, 0x1AB93D1D,0x0BA5A4DF,0xA186F20F,0x2868F169,0xDCB7DA83,0x573906FE, 0xA1E2CE9B,0x4FCD7F52,0x50115E01,0xA70683FA,0xA002B5C4,0x0DE6D027, 0x9AF88C27,0x773F8641,0xC3604C06,0x61A806B5,0xF0177A28,0xC0F586E0, 0x006058AA,0x30DC7D62,0x11E69ED7,0x2338EA63,0x53C2DD94,0xC2C21634, 0xBBCBEE56,0x90BCB6DE,0xEBFC7DA1,0xCE591D76,0x6F05E409,0x4B7C0188, 0x39720A3D,0x7C927C24,0x86E3725F,0x724D9DB9,0x1AC15BB4,0xD39EB8FC, 0xED545578,0x08FCA5B5,0xD83D7CD3,0x4DAD0FC4,0x1E50EF5E,0xB161E6F8, 0xA28514D9,0x6C51133C,0x6FD5C7E7,0x56E14EC4,0x362ABFCE,0xDDC6C837, 0xD79A3234,0x92638212,0x670EFA8E,0x406000E0 }; static const u32 ks3[256] = { 0x3A39CE37,0xD3FAF5CF,0xABC27737,0x5AC52D1B,0x5CB0679E,0x4FA33742, 0xD3822740,0x99BC9BBE,0xD5118E9D,0xBF0F7315,0xD62D1C7E,0xC700C47B, 0xB78C1B6B,0x21A19045,0xB26EB1BE,0x6A366EB4,0x5748AB2F,0xBC946E79, 0xC6A376D2,0x6549C2C8,0x530FF8EE,0x468DDE7D,0xD5730A1D,0x4CD04DC6, 0x2939BBDB,0xA9BA4650,0xAC9526E8,0xBE5EE304,0xA1FAD5F0,0x6A2D519A, 0x63EF8CE2,0x9A86EE22,0xC089C2B8,0x43242EF6,0xA51E03AA,0x9CF2D0A4, 0x83C061BA,0x9BE96A4D,0x8FE51550,0xBA645BD6,0x2826A2F9,0xA73A3AE1, 0x4BA99586,0xEF5562E9,0xC72FEFD3,0xF752F7DA,0x3F046F69,0x77FA0A59, 0x80E4A915,0x87B08601,0x9B09E6AD,0x3B3EE593,0xE990FD5A,0x9E34D797, 0x2CF0B7D9,0x022B8B51,0x96D5AC3A,0x017DA67D,0xD1CF3ED6,0x7C7D2D28, 0x1F9F25CF,0xADF2B89B,0x5AD6B472,0x5A88F54C,0xE029AC71,0xE019A5E6, 0x47B0ACFD,0xED93FA9B,0xE8D3C48D,0x283B57CC,0xF8D56629,0x79132E28, 0x785F0191,0xED756055,0xF7960E44,0xE3D35E8C,0x15056DD4,0x88F46DBA, 0x03A16125,0x0564F0BD,0xC3EB9E15,0x3C9057A2,0x97271AEC,0xA93A072A, 0x1B3F6D9B,0x1E6321F5,0xF59C66FB,0x26DCF319,0x7533D928,0xB155FDF5, 0x03563482,0x8ABA3CBB,0x28517711,0xC20AD9F8,0xABCC5167,0xCCAD925F, 0x4DE81751,0x3830DC8E,0x379D5862,0x9320F991,0xEA7A90C2,0xFB3E7BCE, 0x5121CE64,0x774FBE32,0xA8B6E37E,0xC3293D46,0x48DE5369,0x6413E680, 0xA2AE0810,0xDD6DB224,0x69852DFD,0x09072166,0xB39A460A,0x6445C0DD, 0x586CDECF,0x1C20C8AE,0x5BBEF7DD,0x1B588D40,0xCCD2017F,0x6BB4E3BB, 0xDDA26A7E,0x3A59FF45,0x3E350A44,0xBCB4CDD5,0x72EACEA8,0xFA6484BB, 0x8D6612AE,0xBF3C6F47,0xD29BE463,0x542F5D9E,0xAEC2771B,0xF64E6370, 0x740E0D8D,0xE75B1357,0xF8721671,0xAF537D5D,0x4040CB08,0x4EB4E2CC, 0x34D2466A,0x0115AF84,0xE1B00428,0x95983A1D,0x06B89FB4,0xCE6EA048, 0x6F3F3B82,0x3520AB82,0x011A1D4B,0x277227F8,0x611560B1,0xE7933FDC, 0xBB3A792B,0x344525BD,0xA08839E1,0x51CE794B,0x2F32C9B7,0xA01FBAC9, 0xE01CC87E,0xBCC7D1F6,0xCF0111C3,0xA1E8AAC7,0x1A908749,0xD44FBD9A, 0xD0DADECB,0xD50ADA38,0x0339C32A,0xC6913667,0x8DF9317C,0xE0B12B4F, 0xF79E59B7,0x43F5BB3A,0xF2D519FF,0x27D9459C,0xBF97222C,0x15E6FC2A, 0x0F91FC71,0x9B941525,0xFAE59361,0xCEB69CEB,0xC2A86459,0x12BAA8D1, 0xB6C1075E,0xE3056A0C,0x10D25065,0xCB03A442,0xE0EC6E0E,0x1698DB3B, 0x4C98A0BE,0x3278E964,0x9F1F9532,0xE0D392DF,0xD3A0342B,0x8971F21E, 0x1B0A7441,0x4BA3348C,0xC5BE7120,0xC37632D8,0xDF359F8D,0x9B992F2E, 0xE60B6F47,0x0FE3F11D,0xE54CDA54,0x1EDAD891,0xCE6279CF,0xCD3E7E6F, 0x1618B166,0xFD2C1D05,0x848FD2C5,0xF6FB2299,0xF523F357,0xA6327623, 0x93A83531,0x56CCCD02,0xACF08162,0x5A75EBB5,0x6E163697,0x88D273CC, 0xDE966292,0x81B949D0,0x4C50901B,0x71C65614,0xE6C6C7BD,0x327A140A, 0x45E1D006,0xC3F27B9A,0xC9AA53FD,0x62A80F00,0xBB25BFE2,0x35BDD2F6, 0x71126905,0xB2040222,0xB6CBCF7C,0xCD769C2B,0x53113EC0,0x1640E3D3, 0x38ABBD60,0x2547ADF0,0xBA38209C,0xF746CE76,0x77AFA1C5,0x20756060, 0x85CBFE4E,0x8AE88DD8,0x7AAAF9B0,0x4CF9AA7E,0x1948C25C,0x02FB8A8C, 0x01C36AE4,0xD6EBE1F9,0x90D4F869,0xA65CDEA0,0x3F09252D,0xC208E69F, 0xB74E6132,0xCE77E25B,0x578FDFE3,0x3AC372E6 }; static const u32 ps[16+2] = { 0x243F6A88,0x85A308D3,0x13198A2E,0x03707344,0xA4093822,0x299F31D0, 0x082EFA98,0xEC4E6C89,0x452821E6,0x38D01377,0xBE5466CF,0x34E90C6C, 0xC0AC29B7,0xC97C50DD,0x3F84D5B5,0xB5470917,0x9216D5D9,0x8979FB1B }; #ifdef USE_AMD64_ASM /* Assembly implementations of Blowfish. */ extern void _gcry_blowfish_amd64_do_encrypt(BLOWFISH_context *c, u32 *ret_xl, u32 *ret_xr); extern void _gcry_blowfish_amd64_encrypt_block(BLOWFISH_context *c, byte *out, const byte *in); extern void _gcry_blowfish_amd64_decrypt_block(BLOWFISH_context *c, byte *out, const byte *in); /* These assembly implementations process four blocks in parallel. */ extern void _gcry_blowfish_amd64_ctr_enc(BLOWFISH_context *ctx, byte *out, const byte *in, byte *ctr); extern void _gcry_blowfish_amd64_cbc_dec(BLOWFISH_context *ctx, byte *out, const byte *in, byte *iv); extern void _gcry_blowfish_amd64_cfb_dec(BLOWFISH_context *ctx, byte *out, const byte *in, byte *iv); static void do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr ) { _gcry_blowfish_amd64_do_encrypt (bc, ret_xl, ret_xr); } static void do_encrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf) { _gcry_blowfish_amd64_encrypt_block (context, outbuf, inbuf); } static void do_decrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf) { _gcry_blowfish_amd64_decrypt_block (context, outbuf, inbuf); } static inline void blowfish_amd64_ctr_enc(BLOWFISH_context *ctx, byte *out, const byte *in, byte *ctr) { _gcry_blowfish_amd64_ctr_enc(ctx, out, in, ctr); } static inline void blowfish_amd64_cbc_dec(BLOWFISH_context *ctx, byte *out, const byte *in, byte *iv) { _gcry_blowfish_amd64_cbc_dec(ctx, out, in, iv); } static inline void blowfish_amd64_cfb_dec(BLOWFISH_context *ctx, byte *out, const byte *in, byte *iv) { _gcry_blowfish_amd64_cfb_dec(ctx, out, in, iv); } static unsigned int encrypt_block (void *context , byte *outbuf, const byte *inbuf) { BLOWFISH_context *c = (BLOWFISH_context *) context; do_encrypt_block (c, outbuf, inbuf); return /*burn_stack*/ (2*8); } static unsigned int decrypt_block (void *context, byte *outbuf, const byte *inbuf) { BLOWFISH_context *c = (BLOWFISH_context *) context; do_decrypt_block (c, outbuf, inbuf); return /*burn_stack*/ (2*8); } #elif defined(USE_ARM_ASM) /* Assembly implementations of Blowfish. */ extern void _gcry_blowfish_arm_do_encrypt(BLOWFISH_context *c, u32 *ret_xl, u32 *ret_xr); extern void _gcry_blowfish_arm_encrypt_block(BLOWFISH_context *c, byte *out, const byte *in); extern void _gcry_blowfish_arm_decrypt_block(BLOWFISH_context *c, byte *out, const byte *in); /* These assembly implementations process two blocks in parallel. */ extern void _gcry_blowfish_arm_ctr_enc(BLOWFISH_context *ctx, byte *out, const byte *in, byte *ctr); extern void _gcry_blowfish_arm_cbc_dec(BLOWFISH_context *ctx, byte *out, const byte *in, byte *iv); extern void _gcry_blowfish_arm_cfb_dec(BLOWFISH_context *ctx, byte *out, const byte *in, byte *iv); static void do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr ) { _gcry_blowfish_arm_do_encrypt (bc, ret_xl, ret_xr); } static void do_encrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf) { _gcry_blowfish_arm_encrypt_block (context, outbuf, inbuf); } static void do_decrypt_block (BLOWFISH_context *context, byte *outbuf, const byte *inbuf) { _gcry_blowfish_arm_decrypt_block (context, outbuf, inbuf); } static unsigned int encrypt_block (void *context , byte *outbuf, const byte *inbuf) { BLOWFISH_context *c = (BLOWFISH_context *) context; do_encrypt_block (c, outbuf, inbuf); return /*burn_stack*/ (10*4); } static unsigned int decrypt_block (void *context, byte *outbuf, const byte *inbuf) { BLOWFISH_context *c = (BLOWFISH_context *) context; do_decrypt_block (c, outbuf, inbuf); return /*burn_stack*/ (10*4); } #else /*USE_ARM_ASM*/ #define F(x) ((( s0[(x)>>24] + s1[((x)>>16)&0xff]) \ ^ s2[((x)>>8)&0xff]) + s3[(x)&0xff] ) #define R(l,r,i) do { l ^= p[i]; r ^= F(l); } while(0) #define R3(l,r,i) do { R(l##0,r##0,i);R(l##1,r##1,i);R(l##2,r##2,i);} while(0) static void do_encrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr ) { u32 xl, xr, *s0, *s1, *s2, *s3, *p; xl = *ret_xl; xr = *ret_xr; p = bc->p; s0 = bc->s0; s1 = bc->s1; s2 = bc->s2; s3 = bc->s3; R( xl, xr, 0); R( xr, xl, 1); R( xl, xr, 2); R( xr, xl, 3); R( xl, xr, 4); R( xr, xl, 5); R( xl, xr, 6); R( xr, xl, 7); R( xl, xr, 8); R( xr, xl, 9); R( xl, xr, 10); R( xr, xl, 11); R( xl, xr, 12); R( xr, xl, 13); R( xl, xr, 14); R( xr, xl, 15); xl ^= p[16]; xr ^= p[16+1]; *ret_xl = xr; *ret_xr = xl; } static void do_encrypt_3 ( BLOWFISH_context *bc, byte *dst, const byte *src ) { u32 xl0, xr0, xl1, xr1, xl2, xr2, *s0, *s1, *s2, *s3, *p; xl0 = buf_get_be32(src + 0); xr0 = buf_get_be32(src + 4); xl1 = buf_get_be32(src + 8); xr1 = buf_get_be32(src + 12); xl2 = buf_get_be32(src + 16); xr2 = buf_get_be32(src + 20); p = bc->p; s0 = bc->s0; s1 = bc->s1; s2 = bc->s2; s3 = bc->s3; R3( xl, xr, 0); R3( xr, xl, 1); R3( xl, xr, 2); R3( xr, xl, 3); R3( xl, xr, 4); R3( xr, xl, 5); R3( xl, xr, 6); R3( xr, xl, 7); R3( xl, xr, 8); R3( xr, xl, 9); R3( xl, xr, 10); R3( xr, xl, 11); R3( xl, xr, 12); R3( xr, xl, 13); R3( xl, xr, 14); R3( xr, xl, 15); xl0 ^= p[16]; xr0 ^= p[16+1]; xl1 ^= p[16]; xr1 ^= p[16+1]; xl2 ^= p[16]; xr2 ^= p[16+1]; buf_put_be32(dst + 0, xr0); buf_put_be32(dst + 4, xl0); buf_put_be32(dst + 8, xr1); buf_put_be32(dst + 12, xl1); buf_put_be32(dst + 16, xr2); buf_put_be32(dst + 20, xl2); } static void decrypt ( BLOWFISH_context *bc, u32 *ret_xl, u32 *ret_xr ) { u32 xl, xr, *s0, *s1, *s2, *s3, *p; xl = *ret_xl; xr = *ret_xr; p = bc->p; s0 = bc->s0; s1 = bc->s1; s2 = bc->s2; s3 = bc->s3; R( xl, xr, 17); R( xr, xl, 16); R( xl, xr, 15); R( xr, xl, 14); R( xl, xr, 13); R( xr, xl, 12); R( xl, xr, 11); R( xr, xl, 10); R( xl, xr, 9); R( xr, xl, 8); R( xl, xr, 7); R( xr, xl, 6); R( xl, xr, 5); R( xr, xl, 4); R( xl, xr, 3); R( xr, xl, 2); xl ^= p[1]; xr ^= p[0]; *ret_xl = xr; *ret_xr = xl; } static void do_decrypt_3 ( BLOWFISH_context *bc, byte *dst, const byte *src ) { u32 xl0, xr0, xl1, xr1, xl2, xr2, *s0, *s1, *s2, *s3, *p; xl0 = buf_get_be32(src + 0); xr0 = buf_get_be32(src + 4); xl1 = buf_get_be32(src + 8); xr1 = buf_get_be32(src + 12); xl2 = buf_get_be32(src + 16); xr2 = buf_get_be32(src + 20); p = bc->p; s0 = bc->s0; s1 = bc->s1; s2 = bc->s2; s3 = bc->s3; R3( xl, xr, 17); R3( xr, xl, 16); R3( xl, xr, 15); R3( xr, xl, 14); R3( xl, xr, 13); R3( xr, xl, 12); R3( xl, xr, 11); R3( xr, xl, 10); R3( xl, xr, 9); R3( xr, xl, 8); R3( xl, xr, 7); R3( xr, xl, 6); R3( xl, xr, 5); R3( xr, xl, 4); R3( xl, xr, 3); R3( xr, xl, 2); xl0 ^= p[1]; xr0 ^= p[0]; xl1 ^= p[1]; xr1 ^= p[0]; xl2 ^= p[1]; xr2 ^= p[0]; buf_put_be32(dst + 0, xr0); buf_put_be32(dst + 4, xl0); buf_put_be32(dst + 8, xr1); buf_put_be32(dst + 12, xl1); buf_put_be32(dst + 16, xr2); buf_put_be32(dst + 20, xl2); } #undef F #undef R #undef R3 static void do_encrypt_block ( BLOWFISH_context *bc, byte *outbuf, const byte *inbuf ) { u32 d1, d2; d1 = buf_get_be32(inbuf); d2 = buf_get_be32(inbuf + 4); do_encrypt( bc, &d1, &d2 ); buf_put_be32(outbuf, d1); buf_put_be32(outbuf + 4, d2); } static unsigned int encrypt_block (void *context, byte *outbuf, const byte *inbuf) { BLOWFISH_context *bc = (BLOWFISH_context *) context; do_encrypt_block (bc, outbuf, inbuf); return /*burn_stack*/ (64); } static void do_decrypt_block (BLOWFISH_context *bc, byte *outbuf, const byte *inbuf) { u32 d1, d2; d1 = buf_get_be32(inbuf); d2 = buf_get_be32(inbuf + 4); decrypt( bc, &d1, &d2 ); buf_put_be32(outbuf, d1); buf_put_be32(outbuf + 4, d2); } static unsigned int decrypt_block (void *context, byte *outbuf, const byte *inbuf) { BLOWFISH_context *bc = (BLOWFISH_context *) context; do_decrypt_block (bc, outbuf, inbuf); return /*burn_stack*/ (64); } #endif /*!USE_AMD64_ASM&&!USE_ARM_ASM*/ /* Bulk encryption of complete blocks in CTR mode. This function is only intended for the bulk encryption feature of cipher.c. CTR is expected to be of size BLOWFISH_BLOCKSIZE. */ static void _gcry_blowfish_ctr_enc(void *context, unsigned char *ctr, void *outbuf_arg, const void *inbuf_arg, size_t nblocks) { BLOWFISH_context *ctx = context; unsigned char *outbuf = outbuf_arg; const unsigned char *inbuf = inbuf_arg; unsigned char tmpbuf[BLOWFISH_BLOCKSIZE * 3]; int burn_stack_depth = (64) + 4 * BLOWFISH_BLOCKSIZE; #ifdef USE_AMD64_ASM { if (nblocks >= 4) burn_stack_depth += 5 * sizeof(void*); /* Process data in 4 block chunks. */ while (nblocks >= 4) { blowfish_amd64_ctr_enc(ctx, outbuf, inbuf, ctr); nblocks -= 4; outbuf += 4 * BLOWFISH_BLOCKSIZE; inbuf += 4 * BLOWFISH_BLOCKSIZE; } /* Use generic code to handle smaller chunks... */ } #elif defined(USE_ARM_ASM) { /* Process data in 2 block chunks. */ while (nblocks >= 2) { _gcry_blowfish_arm_ctr_enc(ctx, outbuf, inbuf, ctr); nblocks -= 2; outbuf += 2 * BLOWFISH_BLOCKSIZE; inbuf += 2 * BLOWFISH_BLOCKSIZE; } /* Use generic code to handle smaller chunks... */ } #endif #if !defined(USE_AMD64_ASM) && !defined(USE_ARM_ASM) for ( ;nblocks >= 3; nblocks -= 3) { /* Prepare the counter blocks. */ cipher_block_cpy (tmpbuf + 0, ctr, BLOWFISH_BLOCKSIZE); cipher_block_cpy (tmpbuf + 8, ctr, BLOWFISH_BLOCKSIZE); cipher_block_cpy (tmpbuf + 16, ctr, BLOWFISH_BLOCKSIZE); cipher_block_add_be16 (tmpbuf + 8, 1, BLOWFISH_BLOCKSIZE); cipher_block_add_be16 (tmpbuf + 16, 2, BLOWFISH_BLOCKSIZE); cipher_block_add_be16 (ctr, 3, BLOWFISH_BLOCKSIZE); /* Encrypt the counter. */ do_encrypt_3(ctx, tmpbuf, tmpbuf); /* XOR the input with the encrypted counter and store in output. */ buf_xor(outbuf, tmpbuf, inbuf, BLOWFISH_BLOCKSIZE * 3); outbuf += BLOWFISH_BLOCKSIZE * 3; inbuf += BLOWFISH_BLOCKSIZE * 3; } #endif for ( ;nblocks; nblocks-- ) { /* Encrypt the counter. */ do_encrypt_block(ctx, tmpbuf, ctr); /* XOR the input with the encrypted counter and store in output. */ cipher_block_xor(outbuf, tmpbuf, inbuf, BLOWFISH_BLOCKSIZE); outbuf += BLOWFISH_BLOCKSIZE; inbuf += BLOWFISH_BLOCKSIZE; /* Increment the counter. */ cipher_block_add_be16 (ctr, 1, BLOWFISH_BLOCKSIZE); } wipememory(tmpbuf, sizeof(tmpbuf)); _gcry_burn_stack(burn_stack_depth); } /* Bulk decryption of complete blocks in CBC mode. This function is only intended for the bulk encryption feature of cipher.c. */ static void _gcry_blowfish_cbc_dec(void *context, unsigned char *iv, void *outbuf_arg, const void *inbuf_arg, size_t nblocks) { BLOWFISH_context *ctx = context; unsigned char *outbuf = outbuf_arg; const unsigned char *inbuf = inbuf_arg; unsigned char savebuf[BLOWFISH_BLOCKSIZE * 3]; int burn_stack_depth = (64) + 4 * BLOWFISH_BLOCKSIZE; #ifdef USE_AMD64_ASM { if (nblocks >= 4) burn_stack_depth += 5 * sizeof(void*); /* Process data in 4 block chunks. */ while (nblocks >= 4) { blowfish_amd64_cbc_dec(ctx, outbuf, inbuf, iv); nblocks -= 4; outbuf += 4 * BLOWFISH_BLOCKSIZE; inbuf += 4 * BLOWFISH_BLOCKSIZE; } /* Use generic code to handle smaller chunks... */ } #elif defined(USE_ARM_ASM) { /* Process data in 2 block chunks. */ while (nblocks >= 2) { _gcry_blowfish_arm_cbc_dec(ctx, outbuf, inbuf, iv); nblocks -= 2; outbuf += 2 * BLOWFISH_BLOCKSIZE; inbuf += 2 * BLOWFISH_BLOCKSIZE; } /* Use generic code to handle smaller chunks... */ } #endif #if !defined(USE_AMD64_ASM) && !defined(USE_ARM_ASM) for ( ;nblocks >= 3; nblocks -= 3) { /* INBUF is needed later and it may be identical to OUTBUF, so store the intermediate result to SAVEBUF. */ do_decrypt_3 (ctx, savebuf, inbuf); cipher_block_xor_1 (savebuf + 0, iv, BLOWFISH_BLOCKSIZE); cipher_block_xor_1 (savebuf + 8, inbuf, BLOWFISH_BLOCKSIZE * 2); cipher_block_cpy (iv, inbuf + 16, BLOWFISH_BLOCKSIZE); buf_cpy (outbuf, savebuf, BLOWFISH_BLOCKSIZE * 3); inbuf += BLOWFISH_BLOCKSIZE * 3; outbuf += BLOWFISH_BLOCKSIZE * 3; } #endif for ( ;nblocks; nblocks-- ) { /* INBUF is needed later and it may be identical to OUTBUF, so store the intermediate result to SAVEBUF. */ do_decrypt_block (ctx, savebuf, inbuf); cipher_block_xor_n_copy_2(outbuf, savebuf, iv, inbuf, BLOWFISH_BLOCKSIZE); inbuf += BLOWFISH_BLOCKSIZE; outbuf += BLOWFISH_BLOCKSIZE; } wipememory(savebuf, sizeof(savebuf)); _gcry_burn_stack(burn_stack_depth); } /* Bulk decryption of complete blocks in CFB mode. This function is only intended for the bulk encryption feature of cipher.c. */ static void _gcry_blowfish_cfb_dec(void *context, unsigned char *iv, void *outbuf_arg, const void *inbuf_arg, size_t nblocks) { BLOWFISH_context *ctx = context; unsigned char *outbuf = outbuf_arg; const unsigned char *inbuf = inbuf_arg; unsigned char tmpbuf[BLOWFISH_BLOCKSIZE * 3]; int burn_stack_depth = (64) + 4 * BLOWFISH_BLOCKSIZE; #ifdef USE_AMD64_ASM { if (nblocks >= 4) burn_stack_depth += 5 * sizeof(void*); /* Process data in 4 block chunks. */ while (nblocks >= 4) { blowfish_amd64_cfb_dec(ctx, outbuf, inbuf, iv); nblocks -= 4; outbuf += 4 * BLOWFISH_BLOCKSIZE; inbuf += 4 * BLOWFISH_BLOCKSIZE; } /* Use generic code to handle smaller chunks... */ } #elif defined(USE_ARM_ASM) { /* Process data in 2 block chunks. */ while (nblocks >= 2) { _gcry_blowfish_arm_cfb_dec(ctx, outbuf, inbuf, iv); nblocks -= 2; outbuf += 2 * BLOWFISH_BLOCKSIZE; inbuf += 2 * BLOWFISH_BLOCKSIZE; } /* Use generic code to handle smaller chunks... */ } #endif #if !defined(USE_AMD64_ASM) && !defined(USE_ARM_ASM) for ( ;nblocks >= 3; nblocks -= 3 ) { cipher_block_cpy (tmpbuf + 0, iv, BLOWFISH_BLOCKSIZE); cipher_block_cpy (tmpbuf + 8, inbuf + 0, BLOWFISH_BLOCKSIZE * 2); cipher_block_cpy (iv, inbuf + 16, BLOWFISH_BLOCKSIZE); do_encrypt_3 (ctx, tmpbuf, tmpbuf); buf_xor (outbuf, inbuf, tmpbuf, BLOWFISH_BLOCKSIZE * 3); outbuf += BLOWFISH_BLOCKSIZE * 3; inbuf += BLOWFISH_BLOCKSIZE * 3; } #endif for ( ;nblocks; nblocks-- ) { do_encrypt_block(ctx, iv, iv); cipher_block_xor_n_copy(outbuf, iv, inbuf, BLOWFISH_BLOCKSIZE); outbuf += BLOWFISH_BLOCKSIZE; inbuf += BLOWFISH_BLOCKSIZE; } wipememory(tmpbuf, sizeof(tmpbuf)); _gcry_burn_stack(burn_stack_depth); } static const char* selftest(void) { BLOWFISH_context c; cipher_bulk_ops_t bulk_ops; byte plain[] = "BLOWFISH"; byte buffer[8]; static const byte plain3[] = { 0xFE, 0xDC, 0xBA, 0x98, 0x76, 0x54, 0x32, 0x10 }; static const byte key3[] = { 0x41, 0x79, 0x6E, 0xA0, 0x52, 0x61, 0x6E, 0xE4 }; static const byte cipher3[] = { 0xE1, 0x13, 0xF4, 0x10, 0x2C, 0xFC, 0xCE, 0x43 }; bf_setkey( (void *) &c, (const unsigned char*)"abcdefghijklmnopqrstuvwxyz", 26, &bulk_ops ); encrypt_block( (void *) &c, buffer, plain ); if( memcmp( buffer, "\x32\x4E\xD0\xFE\xF4\x13\xA2\x03", 8 ) ) return "Blowfish selftest failed (1)."; decrypt_block( (void *) &c, buffer, buffer ); if( memcmp( buffer, plain, 8 ) ) return "Blowfish selftest failed (2)."; bf_setkey( (void *) &c, key3, 8, &bulk_ops ); encrypt_block( (void *) &c, buffer, plain3 ); if( memcmp( buffer, cipher3, 8 ) ) return "Blowfish selftest failed (3)."; decrypt_block( (void *) &c, buffer, buffer ); if( memcmp( buffer, plain3, 8 ) ) return "Blowfish selftest failed (4)."; return NULL; } struct hashset_elem { u32 val; short nidx; char used; }; static inline byte val_to_hidx(u32 val) { /* bf sboxes are quite random already. */ return (val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val; } static inline int add_val(struct hashset_elem hset[256], u32 val, int *midx, struct hashset_elem *mpool) { struct hashset_elem *elem; byte hidx; hidx = val_to_hidx(val); elem = &hset[hidx]; /* Check if first is in use. */ if (elem->used == 0) { elem->val = val; elem->nidx = -1; elem->used = 1; return 0; } /* Check if first matches. */ if (elem->val == val) return 1; for (; elem->nidx >= 0; elem = &mpool[elem->nidx]) { /* Check if elem matches. */ if (elem->val == val) return 1; } elem->nidx = (*midx)++; elem = &mpool[elem->nidx]; elem->val = val; elem->nidx = -1; elem->used = 1; return 0; } static gcry_err_code_t do_bf_setkey (BLOWFISH_context *c, const byte *key, unsigned keylen) { struct hashset_elem mempool[4 * 255]; /* Enough entries for the worst case. */ struct hashset_elem hset[4][256]; int memidx = 0; int weak = 0; int i, j, ret; u32 data, datal, datar; static int initialized; static const char *selftest_failed; if( !initialized ) { initialized = 1; selftest_failed = selftest(); if( selftest_failed ) log_error ("%s\n", selftest_failed ); } if( selftest_failed ) return GPG_ERR_SELFTEST_FAILED; if (keylen < BLOWFISH_KEY_MIN_BITS / 8 || keylen > BLOWFISH_KEY_MAX_BITS / 8) return GPG_ERR_INV_KEYLEN; memset(hset, 0, sizeof(hset)); for(i=0; i < 16+2; i++ ) c->p[i] = ps[i]; for(i=0; i < 256; i++ ) { c->s0[i] = ks0[i]; c->s1[i] = ks1[i]; c->s2[i] = ks2[i]; c->s3[i] = ks3[i]; } for(i=j=0; i < 16+2; i++ ) { data = ((u32)key[j] << 24) | ((u32)key[(j+1)%keylen] << 16) | ((u32)key[(j+2)%keylen] << 8) | ((u32)key[(j+3)%keylen]); c->p[i] ^= data; j = (j+4) % keylen; } datal = datar = 0; for(i=0; i < 16+2; i += 2 ) { do_encrypt( c, &datal, &datar ); c->p[i] = datal; c->p[i+1] = datar; } for(i=0; i < 256; i += 2 ) { do_encrypt( c, &datal, &datar ); c->s0[i] = datal; c->s0[i+1] = datar; /* Add values to hashset, detect duplicates (weak keys). */ ret = add_val (hset[0], datal, &memidx, mempool); weak = ret ? 1 : weak; ret = add_val (hset[0], datar, &memidx, mempool); weak = ret ? 1 : weak; } for(i=0; i < 256; i += 2 ) { do_encrypt( c, &datal, &datar ); c->s1[i] = datal; c->s1[i+1] = datar; /* Add values to hashset, detect duplicates (weak keys). */ ret = add_val (hset[1], datal, &memidx, mempool); weak = ret ? 1 : weak; ret = add_val (hset[1], datar, &memidx, mempool); weak = ret ? 1 : weak; } for(i=0; i < 256; i += 2 ) { do_encrypt( c, &datal, &datar ); c->s2[i] = datal; c->s2[i+1] = datar; /* Add values to hashset, detect duplicates (weak keys). */ ret = add_val (hset[2], datal, &memidx, mempool); weak = ret ? 1 : weak; ret = add_val (hset[2], datar, &memidx, mempool); weak = ret ? 1 : weak; } for(i=0; i < 256; i += 2 ) { do_encrypt( c, &datal, &datar ); c->s3[i] = datal; c->s3[i+1] = datar; /* Add values to hashset, detect duplicates (weak keys). */ ret = add_val (hset[3], datal, &memidx, mempool); weak = ret ? 1 : weak; ret = add_val (hset[3], datar, &memidx, mempool); weak = ret ? 1 : weak; } /* Clear stack. */ wipememory(hset, sizeof(hset)); wipememory(mempool, sizeof(mempool[0]) * memidx); _gcry_burn_stack (64); /* Check for weak key. A weak key is a key in which a value in the P-array (here c) occurs more than once per table. */ if (weak) return GPG_ERR_WEAK_KEY; return GPG_ERR_NO_ERROR; } static gcry_err_code_t bf_setkey (void *context, const byte *key, unsigned keylen, cipher_bulk_ops_t *bulk_ops) { BLOWFISH_context *c = (BLOWFISH_context *) context; gcry_err_code_t rc = do_bf_setkey (c, key, keylen); /* Setup bulk encryption routines. */ memset (bulk_ops, 0, sizeof(*bulk_ops)); bulk_ops->cfb_dec = _gcry_blowfish_cfb_dec; bulk_ops->cbc_dec = _gcry_blowfish_cbc_dec; bulk_ops->ctr16be_enc = _gcry_blowfish_ctr_enc; return rc; } gcry_cipher_spec_t _gcry_cipher_spec_blowfish = { GCRY_CIPHER_BLOWFISH, {0, 0}, "BLOWFISH", NULL, NULL, BLOWFISH_BLOCKSIZE, 128, sizeof (BLOWFISH_context), bf_setkey, encrypt_block, decrypt_block };