openssl/doc/crypto/d2i_X509_ALGOR.pod
Rich Salz 9b86974e0c Fix L<> content in manpages
L<foo|foo> is sub-optimal  If the xref is the same as the title,
which is what we do, then you only need L<foo>.  This fixes all
1457 occurrences in 349 files.  Approximately.  (And pod used to
need both.)

Reviewed-by: Richard Levitte <levitte@openssl.org>
2015-08-21 15:11:50 -04:00

55 lines
1.9 KiB
Text

=pod
=head1 NAME
d2i_X509_ALGOR, i2d_X509_ALGOR, X509_ALGOR_dup, X509_ALGOR_set0, X509_ALGOR_get0, X509_ALGOR_set_md, X509_ALGOR_cmp - AlgorithmIdentifier functions.
=head1 SYNOPSIS
#include <openssl/x509.h>
X509_ALGOR *d2i_X509_ALGOR(X509_ALGOR **a, unsigned char **pp, long length);
int i2d_X509_ALGOR(X509_ALGOR *a, unsigned char **pp);
X509_ALGOR *X509_ALGOR_dup(X509_ALGOR *alg);
int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval);
void X509_ALGOR_get0(ASN1_OBJECT **paobj, int *pptype, void **ppval,
X509_ALGOR *alg);
void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md);
int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b);
=head1 DESCRIPTION
The functions d2i_X509() and i2d_X509() decode and encode an B<X509_ALGOR>
structure which is equivalent to the B<AlgorithmIdentifier> structure.
Otherwise they behave in a similar way to d2i_X509() and i2d_X509()
described in the L<d2i_X509(3)> manual page.
X509_ALGOR_dup() returns a copy of B<alg>.
X509_ALGOR_set0() sets the algorithm OID of B<alg> to B<aobj> and the
associated parameter type to B<ptype> with value B<pval>. If B<ptype> is
B<V_ASN1_UNDEF> the parameter is omitted, otherwise B<ptype> and B<pval> have
the same meaning as the B<type> and B<value> parameters to ASN1_TYPE_set().
All the supplied parameters are used internally so must B<NOT> be freed after
this call.
X509_ALGOR_get0() is the inverse of X509_ALGOR_set0(): it returns the
algorithm OID in B<*paobj> and the associated parameter in B<*pptype>
and B<*ppval> from the B<AlgorithmIdentifier> B<alg>.
X509_ALGOR_set_md() sets the B<AlgorithmIdentifier> B<alg> to appropriate
values for the message digest B<md>.
X509_ALGOR_cmp() compares B<a> and B<b> and returns 0 if they have identical
encodings and non-zero otherwise.
=head1 SEE ALSO
L<d2i_X509(3)>
=head1 HISTORY
TBA
=cut