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Edit File : X509_CRL_verify.3 \| Size : 7.73 KB
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" 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 .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/x509.h> \& \& 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); \& \& 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); \& \& 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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBX509_sign()\fR signs certificate \fBx\fR using private key \fBpkey\fR and message digest \fBmd\fR and sets the signature in \fBx\fR. \fBX509_sign_ctx()\fR also signs certificate \fBx\fR but uses the parameters contained in digest context \fBctx\fR. .PP \&\fBX509_verify()\fR verifies the signature of certificate \fBx\fR using public key \&\fBpkey\fR. Only the signature is checked: no other checks (such as certificate chain validity) are performed. .PP \&\fBX509_REQ_sign()\fR, \fBX509_REQ_sign_ctx()\fR, \fBX509_REQ_verify()\fR, \&\fBX509_CRL_sign()\fR, \fBX509_CRL_sign_ctx()\fR and \fBX509_CRL_verify()\fR sign and verify certificate requests and CRLs respectively. .SH "NOTES" .IX Header "NOTES" \&\fBX509_sign_ctx()\fR 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. .PP For efficiency reasons and to work around \s-1ASN.1\s0 encoding issues the encoding of the signed portion of a certificate, certificate request and \s-1CRL\s0 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. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBX509_sign()\fR, \fBX509_sign_ctx()\fR, \fBX509_REQ_sign()\fR, \fBX509_REQ_sign_ctx()\fR, \&\fBX509_CRL_sign()\fR and \fBX509_CRL_sign_ctx()\fR return the size of the signature in bytes for success and zero for failure. .PP \&\fBX509_verify()\fR, \fBX509_REQ_verify()\fR and \fBX509_CRL_verify()\fR 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. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBd2i_X509\fR\\|(3), \&\fBERR_get_error\fR\\|(3), \&\fBX509_CRL_get0_by_serial\fR\\|(3), \&\fBX509_get0_signature\fR\\|(3), \&\fBX509_get_ext_d2i\fR\\|(3), \&\fBX509_get_extension_flags\fR\\|(3), \&\fBX509_get_pubkey\fR\\|(3), \&\fBX509_get_subject_name\fR\\|(3), \&\fBX509_get_version\fR\\|(3), \&\fBX509_NAME_add_entry_by_txt\fR\\|(3), \&\fBX509_NAME_ENTRY_get_object\fR\\|(3), \&\fBX509_NAME_get_index_by_NID\fR\\|(3), \&\fBX509_NAME_print_ex\fR\\|(3), \&\fBX509_new\fR\\|(3), \&\fBX509V3_get_d2i\fR\\|(3), \&\fBX509_verify_cert\fR\\|(3) .SH "HISTORY" .IX Header "HISTORY" The \fBX509_sign()\fR, \fBX509_REQ_sign()\fR and \fBX509_CRL_sign()\fR functions are available in all versions of OpenSSL. .PP The \fBX509_sign_ctx()\fR, \fBX509_REQ_sign_ctx()\fR and \fBX509_CRL_sign_ctx()\fR functions were added OpenSSL 1.0.1. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2015\-2016 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \(L"License\(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>. Back

Edit File : X509_CRL_verify.3 | Size : 7.73 KB

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.\" ========================================================================
.\"
.IX Title "X509_SIGN 3"
.TH X509_SIGN 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
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
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509.h>
\&
\& 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);
\&
\& 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);
\&
\& 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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBX509_sign()\fR signs certificate \fBx\fR using private key \fBpkey\fR and message
digest \fBmd\fR and sets the signature in \fBx\fR. \fBX509_sign_ctx()\fR also signs
certificate \fBx\fR but uses the parameters contained in digest context \fBctx\fR.
.PP
\&\fBX509_verify()\fR verifies the signature of certificate \fBx\fR using public key
\&\fBpkey\fR. Only the signature is checked: no other checks (such as certificate
chain validity) are performed.
.PP
\&\fBX509_REQ_sign()\fR, \fBX509_REQ_sign_ctx()\fR, \fBX509_REQ_verify()\fR,
\&\fBX509_CRL_sign()\fR, \fBX509_CRL_sign_ctx()\fR and \fBX509_CRL_verify()\fR sign and verify
certificate requests and CRLs respectively.
.SH "NOTES"
.IX Header "NOTES"
\&\fBX509_sign_ctx()\fR 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.
.PP
For efficiency reasons and to work around \s-1ASN.1\s0 encoding issues the encoding
of the signed portion of a certificate, certificate request and \s-1CRL\s0 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.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBX509_sign()\fR, \fBX509_sign_ctx()\fR, \fBX509_REQ_sign()\fR, \fBX509_REQ_sign_ctx()\fR,
\&\fBX509_CRL_sign()\fR and \fBX509_CRL_sign_ctx()\fR return the size of the signature
in bytes for success and zero for failure.
.PP
\&\fBX509_verify()\fR, \fBX509_REQ_verify()\fR and \fBX509_CRL_verify()\fR 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.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBd2i_X509\fR\|(3),
\&\fBERR_get_error\fR\|(3),
\&\fBX509_CRL_get0_by_serial\fR\|(3),
\&\fBX509_get0_signature\fR\|(3),
\&\fBX509_get_ext_d2i\fR\|(3),
\&\fBX509_get_extension_flags\fR\|(3),
\&\fBX509_get_pubkey\fR\|(3),
\&\fBX509_get_subject_name\fR\|(3),
\&\fBX509_get_version\fR\|(3),
\&\fBX509_NAME_add_entry_by_txt\fR\|(3),
\&\fBX509_NAME_ENTRY_get_object\fR\|(3),
\&\fBX509_NAME_get_index_by_NID\fR\|(3),
\&\fBX509_NAME_print_ex\fR\|(3),
\&\fBX509_new\fR\|(3),
\&\fBX509V3_get_d2i\fR\|(3),
\&\fBX509_verify_cert\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The \fBX509_sign()\fR, \fBX509_REQ_sign()\fR and \fBX509_CRL_sign()\fR functions are
available in all versions of OpenSSL.
.PP
The \fBX509_sign_ctx()\fR, \fBX509_REQ_sign_ctx()\fR
and \fBX509_CRL_sign_ctx()\fR functions were added OpenSSL 1.0.1.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2015\-2016 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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