=pod =head1 NAME X509_ALGOR_dup, X509_ALGOR_set0, X509_ALGOR_get0, X509_ALGOR_set_md, X509_ALGOR_cmp - AlgorithmIdentifier functions =head1 SYNOPSIS #include 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(const ASN1_OBJECT **paobj, int *pptype, const void **ppval, const 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 X509_ALGOR_dup() returns a copy of B. X509_ALGOR_set0() sets the algorithm OID of B to B and the associated parameter type to B with value B. If B is B the parameter is omitted, otherwise B and B have the same meaning as the B and B parameters to ASN1_TYPE_set(). All the supplied parameters are used internally so must B 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 B. X509_ALGOR_set_md() sets the B B to appropriate values for the message digest B. X509_ALGOR_cmp() compares B and B and returns 0 if they have identical encodings and non-zero otherwise. =head1 RETURN VALUES X509_ALGOR_dup() returns a valid B structure or NULL if an error occurred. X509_ALGOR_set0() returns 1 on success or 0 on error. X509_ALGOR_get0() and X509_ALGOR_set_md() return no values. X509_ALGOR_cmp() returns 0 if the two parameters have identical encodings and non-zero otherwise. =head1 COPYRIGHT Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at L. =cut