mirror of
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7525c93030
Reviewed-by: Shane Lontis <shane.lontis@oracle.com> Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/11507)
112 lines
4.0 KiB
Plaintext
112 lines
4.0 KiB
Plaintext
=pod
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=head1 NAME
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X509_sign, X509_sign_ctx, X509_verify_ex, X509_verify, X509_REQ_sign,
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X509_REQ_sign_ctx, X509_REQ_verify_ex, X509_REQ_verify, X509_CRL_sign,
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X509_CRL_sign_ctx, X509_CRL_verify
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- sign or verify certificate, certificate request or CRL signature
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=head1 SYNOPSIS
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#include <openssl/x509.h>
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int X509_sign(X509 *x, EVP_PKEY *pkey, const EVP_MD *md);
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int X509_sign_ctx(X509 *x, EVP_MD_CTX *ctx);
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int X509_verify_ex(X509 *x, EVP_PKEY *pkey, OPENSSL_CTX *libctx, const char *propq);
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int X509_verify(X509 *x, EVP_PKEY *pkey;
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int X509_REQ_sign(X509_REQ *x, EVP_PKEY *pkey, const EVP_MD *md);
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int X509_REQ_sign_ctx(X509_REQ *x, EVP_MD_CTX *ctx);
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int X509_REQ_verify_ex(X509_REQ *a, EVP_PKEY *pkey, OPENSSL_CTX *libctx,
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const char *propq);
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int X509_REQ_verify(X509_REQ *a, EVP_PKEY *pkey);
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int X509_CRL_sign(X509_CRL *x, EVP_PKEY *pkey, const EVP_MD *md);
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int X509_CRL_sign_ctx(X509_CRL *x, EVP_MD_CTX *ctx);
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int X509_CRL_verify(X509_CRL *a, EVP_PKEY *pkey);
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=head1 DESCRIPTION
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X509_sign() signs certificate I<x> using private key I<pkey> and message
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digest I<md> and sets the signature in I<x>. X509_sign_ctx() also signs
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certificate I<x> but uses the parameters contained in digest context I<ctx>.
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X509_verify_ex() verifies the signature of certificate I<x> using public key
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I<pkey>. Any cryptographic algorithms required for the verification are fetched
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using the library context I<libctx> and the property query string I<propq>. Only
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the signature is checked: no other checks (such as certificate chain validity)
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are performed.
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X509_verify() is the same as X509_verify_ex() except that the default library
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context and property query string are used.
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X509_REQ_sign(), X509_REQ_sign_ctx(), X509_REQ_verify_ex(), X509_REQ_verify(),
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X509_CRL_sign(), X509_CRL_sign_ctx() and X509_CRL_verify() sign and verify
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certificate requests and CRLs respectively.
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=head1 NOTES
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X509_sign_ctx() is used where the default parameters for the corresponding
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public key and digest are not suitable. It can be used to sign keys using
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RSA-PSS for example.
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For efficiency reasons and to work around ASN.1 encoding issues the encoding
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of the signed portion of a certificate, certificate request and CRL is cached
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internally. If the signed portion of the structure is modified the encoding
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is not always updated meaning a stale version is sometimes used. This is not
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normally a problem because modifying the signed portion will invalidate the
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signature and signing will always update the encoding.
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=head1 RETURN VALUES
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X509_sign(), X509_sign_ctx(), X509_REQ_sign(), X509_REQ_sign_ctx(),
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X509_CRL_sign() and X509_CRL_sign_ctx() return the size of the signature
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in bytes for success and zero for failure.
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X509_verify_ex(), X509_verify(), X509_REQ_verify_ex(), X509_REQ_verify() and
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X509_CRL_verify() return 1 if the signature is valid and 0 if the signature
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check fails. If the signature could not be checked at all because it was invalid
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or some other error occurred then -1 is returned.
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=head1 SEE ALSO
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L<d2i_X509(3)>,
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L<ERR_get_error(3)>,
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L<X509_CRL_get0_by_serial(3)>,
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L<X509_get0_signature(3)>,
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L<X509_get_ext_d2i(3)>,
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L<X509_get_extension_flags(3)>,
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L<X509_get_pubkey(3)>,
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L<X509_get_subject_name(3)>,
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L<X509_get_version(3)>,
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L<X509_NAME_add_entry_by_txt(3)>,
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L<X509_NAME_ENTRY_get_object(3)>,
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L<X509_NAME_get_index_by_NID(3)>,
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L<X509_NAME_print_ex(3)>,
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L<X509_new(3)>,
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L<X509V3_get_d2i(3)>,
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L<X509_verify_cert(3)>,
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L<OPENSSL_CTX(3)>
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=head1 HISTORY
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The X509_sign(), X509_REQ_sign() and X509_CRL_sign() functions are
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available in all versions of OpenSSL.
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The X509_sign_ctx(), X509_REQ_sign_ctx()
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and X509_CRL_sign_ctx() functions were added OpenSSL 1.0.1.
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X509_verify_ex() and X509_REQ_verify_ex() were added in OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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