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docs/api/xmlsec-notes-sign-x509.html
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lsh123
Preparation for xmlsec 1.3.5 (#821)
18 июл 2024, 22:13
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18 июл 2024, 22:13
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Signing data with X509 certificate.: XML Security Library Reference Manual</title> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <link rel="home" href="index.html" title="XML Security Library Reference Manual"> <link rel="up" href="xmlsec-notes-x509.html" title="Using X509 Certificates."> <link rel="prev" href="xmlsec-notes-x509.html" title="Using X509 Certificates."> <link rel="next" href="xmlsec-notes-verify-x509.html" title="Verifing document signed with X509 certificates."> <meta name="generator" content="GTK-Doc V1.33.1 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"></td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="xmlsec-notes-x509.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="xmlsec-notes-x509.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="xmlsec-notes-verify-x509.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="sect1"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> <a name="xmlsec-notes-sign-x509"></a>Signing data with X509 certificate.</h2></div></div></div> <p>To sign a file using X509 certificate, an application need to associate the certificate (or certificates) with the private key using one of the following functions: </p> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"><p> <a class="link" href="xmlsec-openssl-app.html#xmlSecOpenSSLAppKeyCertLoad" title="xmlSecOpenSSLAppKeyCertLoad ()">xmlSecOpenSSLAppKeyCertLoad</a> - loads certificate from a file and adds to the key; </p></li> <li class="listitem"><p> <a class="link" href="xmlsec-openssl-app.html#xmlSecOpenSSLAppPkcs12Load" title="xmlSecOpenSSLAppPkcs12Load ()">xmlSecOpenSSLAppPkcs12Load</a> - loads private key and all the certificates associated with it from a PKCS12 file; </p></li> <li class="listitem"><p> <a class="link" href="xmlsec-keys.html#xmlSecKeyAdoptData" title="xmlSecKeyAdoptData ()">xmlSecKeyAdoptData</a> - low level function to add key data (including X509 key data) to the key. </p></li> </ul></div> <p> </p> <div class="example"> <a name="id-1.2.11.3.2.2"></a><p class="title"><b>Example 20. Loading private key and X509 certificate.</b></p> <div class="example-contents"> <pre class="programlisting"> /* load private key, assuming that there is not password */ key = xmlSecCryptoAppKeyLoad(key_file, xmlSecKeyDataFormatPem, NULL, NULL, NULL); if(key == NULL) { fprintf(stderr,"Error: failed to load private pem key from \"%s\"\n", key_file); goto done; } /* load certificate and add to the key */ if(xmlSecCryptoAppKeyCertLoad(key, cert_file, xmlSecKeyDataFormatPem) < 0) { fprintf(stderr,"Error: failed to load pem certificate \"%s\"\n", cert_file); goto done; } </pre> <p><a class="link" href="xmlsec-examples-sign-x509.html#xmlsec-example-sign3" title="sign3.c">Full program listing</a></p> </div> </div> <p><br class="example-break"> </p> <p>Next step is to prepare signature template with <dsig:X509Data/> child of the <dsig:KeyInfo/> element. When XML Security Library finds this node in the template, it automaticaly creates <dsig:X509Certificate/> children of the <dsig:X509Data/> element and writes to result XML document all the certificates associated with the signature key. </p> <div class="example"> <a name="id-1.2.11.3.3.1"></a><p class="title"><b>Example 21. Dynamicaly creating a signature template for signing document using X509 certificate.</b></p> <div class="example-contents"> <pre class="programlisting"> /* create signature template for RSA-SHA1 enveloped signature */ signNode = xmlSecTmplSignatureCreate(doc, xmlSecTransformExclC14NId, xmlSecTransformRsaSha1Id, NULL); if(signNode == NULL) { fprintf(stderr, "Error: failed to create signature template\n"); goto done; } /* add <dsig:Signature/> node to the doc */ xmlAddChild(xmlDocGetRootElement(doc), signNode); /* add reference */ refNode = xmlSecTmplSignatureAddReference(signNode, xmlSecTransformSha1Id, NULL, NULL, NULL); if(refNode == NULL) { fprintf(stderr, "Error: failed to add reference to signature template\n"); goto done; } /* add enveloped transform */ if(xmlSecTmplReferenceAddTransform(refNode, xmlSecTransformEnvelopedId) == NULL) { fprintf(stderr, "Error: failed to add enveloped transform to reference\n"); goto done; } /* add <dsig:KeyInfo/> and <dsig:X509Data/> */ keyInfoNode = xmlSecTmplSignatureEnsureKeyInfo(signNode, NULL); if(keyInfoNode == NULL) { fprintf(stderr, "Error: failed to add key info\n"); goto done; } if(xmlSecTmplKeyInfoAddX509Data(keyInfoNode) == NULL) { fprintf(stderr, "Error: failed to add X509Data node\n"); goto done; } </pre> <p><a class="link" href="xmlsec-examples-sign-x509.html#xmlsec-example-sign3" title="sign3.c">Full program listing</a></p> </div> </div> <p><br class="example-break"> </p> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.33.1</div> </body> </html>