1=pod 2 3=head1 NAME 4 5X509_ALGOR_dup, 6X509_ALGOR_set0, X509_ALGOR_get0, 7X509_ALGOR_set_md, X509_ALGOR_cmp, 8X509_ALGOR_copy - AlgorithmIdentifier functions 9 10=head1 SYNOPSIS 11 12 #include <openssl/x509.h> 13 14 X509_ALGOR *X509_ALGOR_dup(X509_ALGOR *alg); 15 int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval); 16 void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype, 17 const void **ppval, const X509_ALGOR *alg); 18 void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md); 19 int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b); 20 int X509_ALGOR_copy(X509_ALGOR *dest, const X509_ALGOR *src); 21 22=head1 DESCRIPTION 23 24X509_ALGOR_dup() returns a copy of I<alg>. 25 26X509_ALGOR_set0() sets the algorithm OID of I<alg> to I<aobj> and the 27associated parameter type to I<ptype> with value I<pval>. If I<ptype> is 28B<V_ASN1_UNDEF> the parameter is omitted, otherwise I<ptype> and I<pval> have 29the same meaning as the I<type> and I<value> parameters to ASN1_TYPE_set(). 30All the supplied parameters are used internally so must B<NOT> be freed after 31this call succeeded; 32otherwise ownership remains with the caller and I<alg> remains untouched. 33 34X509_ALGOR_get0() is the inverse of X509_ALGOR_set0(): it returns the 35algorithm OID in I<*paobj> and the associated parameter in I<*pptype> 36and I<*ppval> from the B<AlgorithmIdentifier> I<alg>. 37 38X509_ALGOR_set_md() sets the B<AlgorithmIdentifier> I<alg> to appropriate 39values for the message digest I<md>. 40 41X509_ALGOR_cmp() compares I<a> and I<b> and returns 0 if they have identical 42encodings and nonzero otherwise. 43 44X509_ALGOR_copy() copies the source values into the dest structs; making 45a duplicate of each (and free any thing pointed to from within *dest). 46 47=head1 RETURN VALUES 48 49X509_ALGOR_dup() returns a valid B<X509_ALGOR> structure or NULL if an error 50occurred. 51 52X509_ALGOR_set0() and X509_ALGOR_copy() return 1 on success or 0 on error. 53 54X509_ALGOR_get0() and X509_ALGOR_set_md() return no values. 55 56X509_ALGOR_cmp() returns 0 if the two parameters have identical encodings and 57nonzero otherwise. 58 59=head1 HISTORY 60 61The X509_ALGOR_copy() was added in 1.1.1e. 62 63=head1 COPYRIGHT 64 65Copyright 2002-2022 The OpenSSL Project Authors. All Rights Reserved. 66 67Licensed under the Apache License 2.0 (the "License"). You may not use 68this file except in compliance with the License. You can obtain a copy 69in the file LICENSE in the source distribution or at 70L<https://www.openssl.org/source/license.html>. 71 72=cut 73
