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X509_ALGOR_DUP(3)		    OpenSSL		     X509_ALGOR_DUP(3)

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

	#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);

       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

       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

       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.

       The X509_ALGOR_copy() was added in 1.1.1e.

       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

1.1.1k				  2021-03-25		     X509_ALGOR_DUP(3)


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