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.\" ========================================================================
.\"
.IX Title "X509_GET_SERIALNUMBER 3"
.TH X509_GET_SERIALNUMBER 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.
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.nh
.SH "NAME"
X509_get_serialNumber, X509_get0_serialNumber, X509_set_serialNumber \&\- get or set certificate serial number
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509.h>
\&
\& ASN1_INTEGER *X509_get_serialNumber(X509 *x);
\& const ASN1_INTEGER *X509_get0_serialNumber(const X509 *x);
\& int X509_set_serialNumber(X509 *x, ASN1_INTEGER *serial);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBX509_get_serialNumber()\fR returns the serial number of certificate \fBx\fR as an
\&\fB\s-1ASN1_INTEGER\s0\fR structure which can be examined or initialised. The value
returned is an internal pointer which \fB\s-1MUST NOT\s0\fR be freed up after the call.
.PP
\&\fBX509_get0_serialNumber()\fR is the same as \fBX509_get_serialNumber()\fR except it
accepts a const parameter and returns a const result.
.PP
\&\fBX509_set_serialNumber()\fR sets the serial number of certificate \fBx\fR to
\&\fBserial\fR. A copy of the serial number is used internally so \fBserial\fR should
be freed up after use.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBX509_get_serialNumber()\fR and \fBX509_get0_serialNumber()\fR return an \fB\s-1ASN1_INTEGER\s0\fR
structure.
.PP
\&\fBX509_set_serialNumber()\fR returns 1 for success and 0 for failure.
.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_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),
\&\fBX509_sign\fR\|(3),
\&\fBX509V3_get_d2i\fR\|(3),
\&\fBX509_verify_cert\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The \fBX509_get_serialNumber()\fR and \fBX509_set_serialNumber()\fR functions are
available in all versions of OpenSSL.
The \fBX509_get0_serialNumber()\fR function was added in OpenSSL 1.1.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 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>.