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<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>X509_sign</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@hsxx.drive.ne.jp" /> </head> <body style="background-color: white"> <!-- INDEX BEGIN --> <div name="index"> <p><a name="__index__"></a></p> <ul> <li><a href="#name">NAME</a></li> <li><a href="#synopsis">SYNOPSIS</a></li> <li><a href="#description">DESCRIPTION</a></li> <li><a href="#notes">NOTES</a></li> <li><a href="#return_values">RETURN VALUES</a></li> <li><a href="#see_also">SEE ALSO</a></li> <li><a href="#history">HISTORY</a></li> <li><a href="#copyright">COPYRIGHT</a></li> </ul> <hr name="index" /> </div> <!-- INDEX END --> <p> </p> <hr /> <h1><a name="name">NAME</a></h1> <p>X509_sign, X509_sign_ctx, X509_verify, X509_REQ_sign, X509_REQ_sign_ctx, X509_REQ_verify, X509_CRL_sign, X509_CRL_sign_ctx, X509_CRL_verify - sign or verify certificate, certificate request or CRL signature</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <pre> #include <openssl/x509.h></pre> <pre> int X509_sign(X509 *x, EVP_PKEY *pkey, const EVP_MD *md); int X509_sign_ctx(X509 *x, EVP_MD_CTX *ctx); int X509_verify(X509 *a, EVP_PKEY *r);</pre> <pre> int X509_REQ_sign(X509_REQ *x, EVP_PKEY *pkey, const EVP_MD *md); int X509_REQ_sign_ctx(X509_REQ *x, EVP_MD_CTX *ctx); int X509_REQ_verify(X509_REQ *a, EVP_PKEY *r);</pre> <pre> int X509_CRL_sign(X509_CRL *x, EVP_PKEY *pkey, const EVP_MD *md); int X509_CRL_sign_ctx(X509_CRL *x, EVP_MD_CTX *ctx); int X509_CRL_verify(X509_CRL *a, EVP_PKEY *r);</pre> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p>X509_sign() signs certificate <strong>x</strong> using private key <strong>pkey</strong> and message digest <strong>md</strong> and sets the signature in <strong>x</strong>. X509_sign_ctx() also signs certificate <strong>x</strong> but uses the parameters contained in digest context <strong>ctx</strong>.</p> <p>X509_verify() verifies the signature of certificate <strong>x</strong> using public key <strong>pkey</strong>. Only the signature is checked: no other checks (such as certificate chain validity) are performed.</p> <p>X509_REQ_sign(), X509_REQ_sign_ctx(), X509_REQ_verify(), X509_CRL_sign(), X509_CRL_sign_ctx() and X509_CRL_verify() sign and verify certificate requests and CRLs respectively.</p> <p> </p> <hr /> <h1><a name="notes">NOTES</a></h1> <p>X509_sign_ctx() is used where the default parameters for the corresponding public key and digest are not suitable. It can be used to sign keys using RSA-PSS for example.</p> <p>For efficiency reasons and to work around ASN.1 encoding issues the encoding of the signed portion of a certificate, certificate request and CRL is cached internally. If the signed portion of the structure is modified the encoding is not always updated meaning a stale version is sometimes used. This is not normally a problem because modifying the signed portion will invalidate the signature and signing will always update the encoding.</p> <p> </p> <hr /> <h1><a name="return_values">RETURN VALUES</a></h1> <p>X509_sign(), X509_sign_ctx(), X509_REQ_sign(), X509_REQ_sign_ctx(), X509_CRL_sign() and X509_CRL_sign_ctx() return the size of the signature in bytes for success and zero for failure.</p> <p>X509_verify(), X509_REQ_verify() and X509_CRL_verify() return 1 if the signature is valid and 0 if the signature check fails. If the signature could not be checked at all because it was invalid or some other error occurred then -1 is returned.</p> <p> </p> <hr /> <h1><a name="see_also">SEE ALSO</a></h1> <p><em>d2i_X509(3)</em>, <em>ERR_get_error(3)</em>, <em>X509_CRL_get0_by_serial(3)</em>, <em>X509_get0_signature(3)</em>, <em>X509_get_ext_d2i(3)</em>, <em>X509_get_extension_flags(3)</em>, <em>X509_get_pubkey(3)</em>, <em>X509_get_subject_name(3)</em>, <em>X509_get_version(3)</em>, <em>X509_NAME_add_entry_by_txt(3)</em>, <em>X509_NAME_ENTRY_get_object(3)</em>, <em>X509_NAME_get_index_by_NID(3)</em>, <em>X509_NAME_print_ex(3)</em>, <em>X509_new(3)</em>, <em>X509V3_get_d2i(3)</em>, <em>X509_verify_cert(3)</em></p> <p> </p> <hr /> <h1><a name="history">HISTORY</a></h1> <p>The X509_sign(), X509_REQ_sign() and X509_CRL_sign() functions are available in all versions of OpenSSL.</p> <p>The X509_sign_ctx(), X509_REQ_sign_ctx() and X509_CRL_sign_ctx() functions were added OpenSSL 1.0.1.</p> <p> </p> <hr /> <h1><a name="copyright">COPYRIGHT</a></h1> <p>Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.</p> <p>Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>