1*4724848cSchristos=pod 2*4724848cSchristos 3*4724848cSchristos=head1 NAME 4*4724848cSchristos 5*4724848cSchristosX509_ALGOR_dup, X509_ALGOR_set0, X509_ALGOR_get0, X509_ALGOR_set_md, X509_ALGOR_cmp, X509_ALGOR_copy - AlgorithmIdentifier functions 6*4724848cSchristos 7*4724848cSchristos=head1 SYNOPSIS 8*4724848cSchristos 9*4724848cSchristos #include <openssl/x509.h> 10*4724848cSchristos 11*4724848cSchristos X509_ALGOR *X509_ALGOR_dup(X509_ALGOR *alg); 12*4724848cSchristos int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval); 13*4724848cSchristos void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype, 14*4724848cSchristos const void **ppval, const X509_ALGOR *alg); 15*4724848cSchristos void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md); 16*4724848cSchristos int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b); 17*4724848cSchristos int X509_ALGOR_copy(X509_ALGOR *dest, const X509_ALGOR *src); 18*4724848cSchristos 19*4724848cSchristos=head1 DESCRIPTION 20*4724848cSchristos 21*4724848cSchristosX509_ALGOR_dup() returns a copy of B<alg>. 22*4724848cSchristos 23*4724848cSchristosX509_ALGOR_set0() sets the algorithm OID of B<alg> to B<aobj> and the 24*4724848cSchristosassociated parameter type to B<ptype> with value B<pval>. If B<ptype> is 25*4724848cSchristosB<V_ASN1_UNDEF> the parameter is omitted, otherwise B<ptype> and B<pval> have 26*4724848cSchristosthe same meaning as the B<type> and B<value> parameters to ASN1_TYPE_set(). 27*4724848cSchristosAll the supplied parameters are used internally so must B<NOT> be freed after 28*4724848cSchristosthis call. 29*4724848cSchristos 30*4724848cSchristosX509_ALGOR_get0() is the inverse of X509_ALGOR_set0(): it returns the 31*4724848cSchristosalgorithm OID in B<*paobj> and the associated parameter in B<*pptype> 32*4724848cSchristosand B<*ppval> from the B<AlgorithmIdentifier> B<alg>. 33*4724848cSchristos 34*4724848cSchristosX509_ALGOR_set_md() sets the B<AlgorithmIdentifier> B<alg> to appropriate 35*4724848cSchristosvalues for the message digest B<md>. 36*4724848cSchristos 37*4724848cSchristosX509_ALGOR_cmp() compares B<a> and B<b> and returns 0 if they have identical 38*4724848cSchristosencodings and nonzero otherwise. 39*4724848cSchristos 40*4724848cSchristosX509_ALGOR_copy() copies the source values into the dest structs; making 41*4724848cSchristosa duplicate of each (and free any thing pointed to from within *dest). 42*4724848cSchristos 43*4724848cSchristos=head1 RETURN VALUES 44*4724848cSchristos 45*4724848cSchristosX509_ALGOR_dup() returns a valid B<X509_ALGOR> structure or NULL if an error 46*4724848cSchristosoccurred. 47*4724848cSchristos 48*4724848cSchristosX509_ALGOR_set0() and X509_ALGOR_copy() return 1 on success or 0 on error. 49*4724848cSchristos 50*4724848cSchristosX509_ALGOR_get0() and X509_ALGOR_set_md() return no values. 51*4724848cSchristos 52*4724848cSchristosX509_ALGOR_cmp() returns 0 if the two parameters have identical encodings and 53*4724848cSchristosnonzero otherwise. 54*4724848cSchristos 55*4724848cSchristos=head1 HISTORY 56*4724848cSchristos 57*4724848cSchristosThe X509_ALGOR_copy() was added in 1.1.1e. 58*4724848cSchristos 59*4724848cSchristos=head1 COPYRIGHT 60*4724848cSchristos 61*4724848cSchristosCopyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved. 62*4724848cSchristos 63*4724848cSchristosLicensed under the OpenSSL license (the "License"). You may not use 64*4724848cSchristosthis file except in compliance with the License. You can obtain a copy 65*4724848cSchristosin the file LICENSE in the source distribution or at 66*4724848cSchristosL<https://www.openssl.org/source/license.html>. 67*4724848cSchristos 68*4724848cSchristos=cut 69