1=pod 2 3=head1 NAME 4 5X509_ALGOR_dup, X509_ALGOR_set0, X509_ALGOR_get0, X509_ALGOR_set_md, X509_ALGOR_cmp - AlgorithmIdentifier functions 6 7=head1 SYNOPSIS 8 9 #include <openssl/x509.h> 10 11 X509_ALGOR *X509_ALGOR_dup(X509_ALGOR *alg); 12 int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval); 13 void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype, 14 const void **ppval, const X509_ALGOR *alg); 15 void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md); 16 int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b); 17 18=head1 DESCRIPTION 19 20X509_ALGOR_dup() returns a copy of B<alg>. 21 22X509_ALGOR_set0() sets the algorithm OID of B<alg> to B<aobj> and the 23associated parameter type to B<ptype> with value B<pval>. If B<ptype> is 24B<V_ASN1_UNDEF> the parameter is omitted, otherwise B<ptype> and B<pval> have 25the same meaning as the B<type> and B<value> parameters to ASN1_TYPE_set(). 26All the supplied parameters are used internally so must B<NOT> be freed after 27this call. 28 29X509_ALGOR_get0() is the inverse of X509_ALGOR_set0(): it returns the 30algorithm OID in B<*paobj> and the associated parameter in B<*pptype> 31and B<*ppval> from the B<AlgorithmIdentifier> B<alg>. 32 33X509_ALGOR_set_md() sets the B<AlgorithmIdentifier> B<alg> to appropriate 34values for the message digest B<md>. 35 36X509_ALGOR_cmp() compares B<a> and B<b> and returns 0 if they have identical 37encodings and non-zero otherwise. 38 39=head1 RETURN VALUES 40 41X509_ALGOR_dup() returns a valid B<X509_ALGOR> structure or NULL if an error 42occurred. 43 44X509_ALGOR_set0() returns 1 on success or 0 on error. 45 46X509_ALGOR_get0() and X509_ALGOR_set_md() return no values. 47 48X509_ALGOR_cmp() returns 0 if the two parameters have identical encodings and 49non-zero otherwise. 50 51=head1 COPYRIGHT 52 53Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved. 54 55Licensed under the OpenSSL license (the "License"). You may not use 56this file except in compliance with the License. You can obtain a copy 57in the file LICENSE in the source distribution or at 58L<https://www.openssl.org/source/license.html>. 59 60=cut 61