Updated: 2021/Apr/14


X509_ALGOR_dup(3)                   OpenSSL                  X509_ALGOR_dup(3)



NAME
       X509_ALGOR_dup, X509_ALGOR_set0, X509_ALGOR_get0, X509_ALGOR_set_md,
       X509_ALGOR_cmp, X509_ALGOR_copy - AlgorithmIdentifier functions

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/x509.h>

        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);
        int X509_ALGOR_copy(X509_ALGOR *dest, const X509_ALGOR *src);

DESCRIPTION
       X509_ALGOR_dup() returns a copy of alg.

       X509_ALGOR_set0() sets the algorithm OID of alg to aobj and the
       associated parameter type to ptype with value pval. If ptype is
       V_ASN1_UNDEF the parameter is omitted, otherwise ptype and pval have
       the same meaning as the type and value parameters to ASN1_TYPE_set().
       All the supplied parameters are used internally so must NOT be freed
       after this call.

       X509_ALGOR_get0() is the inverse of X509_ALGOR_set0(): it returns the
       algorithm OID in *paobj and the associated parameter in *pptype and
       *ppval from the AlgorithmIdentifier alg.

       X509_ALGOR_set_md() sets the AlgorithmIdentifier alg to appropriate
       values for the message digest md.

       X509_ALGOR_cmp() compares a and b and returns 0 if they have identical
       encodings and nonzero otherwise.

       X509_ALGOR_copy() copies the source values into the dest structs;
       making a duplicate of each (and free any thing pointed to from within
       *dest).

RETURN VALUES
       X509_ALGOR_dup() returns a valid X509_ALGOR structure or NULL if an
       error occurred.

       X509_ALGOR_set0() and X509_ALGOR_copy() return 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 nonzero otherwise.

HISTORY
       The X509_ALGOR_copy() was added in 1.1.1e.

COPYRIGHT
       Copyright 2002-2020 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
       <https://www.openssl.org/source/license.html>.



1.1.1i                            2020-12-10                 X509_ALGOR_dup(3)