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=head1 NAME

X509_get_serialNumber, X509_set_serialNumber - get or set certificate serial
number.

=head1 SYNOPSIS

 #include <openssl/x509.h>

 ASN1_INTEGER *X509_get_serialNumber(X509 *x);
 int X509_set_serialNumber(X509 *x, ASN1_INTEGER *serial);

=head1 DESCRIPTION

X509_get_serialNumber() returns the serial number of certificate B<x> as an
B<ASN1_INTEGER> structure which can be examined or initialised. The value
returned is an internal pointer which B<MUST NOT> be freed up after the call.

X509_set_serialNumber() sets the serial number of certificate B<x> to
B<serial>. A copy of the serial number is used internally so B<serial> should
be freed up after use.

=head1 RETURN VALUES

X509_get_serialNumber() returns an B<ASN1_INTEGER> structure.

X509_set_serialNumber() returns 1 for success and 0 for failure.

=head1 SEE ALSO

L<d2i_X509(3)>,
L<ERR_get_error(3)>,
L<X509_CRL_get0_by_serial(3)>,
L<X509_get0_signature(3)>,
L<X509_get_ext_d2i(3)>,
L<X509_get_extension_flags(3)>,
L<X509_get_pubkey(3)>,
L<X509_get_subject_name(3)>,
L<X509_NAME_add_entry_by_txt(3)>,
L<X509_NAME_ENTRY_get_object(3)>,
L<X509_NAME_get_index_by_NID(3)>,
L<X509_NAME_print_ex(3)>,
L<X509_new(3)>,
L<X509_sign(3)>,
L<X509V3_get_d2i(3)>,
L<X509_verify_cert(3)>

=head1 HISTORY

X509_get_serialNumber() and X509_set_serialNumber() are available in
all versions of OpenSSL.

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