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69 lines
2.3 KiB
Plaintext
69 lines
2.3 KiB
Plaintext
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=pod
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=head1 NAME
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X509_ALGOR_dup, X509_ALGOR_set0, X509_ALGOR_get0, X509_ALGOR_set_md, X509_ALGOR_cmp, X509_ALGOR_copy - AlgorithmIdentifier functions
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=head1 SYNOPSIS
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#include <openssl/x509.h>
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X509_ALGOR *X509_ALGOR_dup(X509_ALGOR *alg);
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int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval);
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void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype,
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const void **ppval, const X509_ALGOR *alg);
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void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md);
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int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b);
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int X509_ALGOR_copy(X509_ALGOR *dest, const X509_ALGOR *src);
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=head1 DESCRIPTION
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X509_ALGOR_dup() returns a copy of B<alg>.
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X509_ALGOR_set0() sets the algorithm OID of B<alg> to B<aobj> and the
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associated parameter type to B<ptype> with value B<pval>. If B<ptype> is
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B<V_ASN1_UNDEF> the parameter is omitted, otherwise B<ptype> and B<pval> have
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the same meaning as the B<type> and B<value> parameters to ASN1_TYPE_set().
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All the supplied parameters are used internally so must B<NOT> be freed after
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this call.
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X509_ALGOR_get0() is the inverse of X509_ALGOR_set0(): it returns the
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algorithm OID in B<*paobj> and the associated parameter in B<*pptype>
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and B<*ppval> from the B<AlgorithmIdentifier> B<alg>.
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X509_ALGOR_set_md() sets the B<AlgorithmIdentifier> B<alg> to appropriate
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values for the message digest B<md>.
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X509_ALGOR_cmp() compares B<a> and B<b> and returns 0 if they have identical
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encodings and nonzero otherwise.
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X509_ALGOR_copy() copies the source values into the dest structs; making
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a duplicate of each (and free any thing pointed to from within *dest).
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=head1 RETURN VALUES
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X509_ALGOR_dup() returns a valid B<X509_ALGOR> structure or NULL if an error
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occurred.
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X509_ALGOR_set0() and X509_ALGOR_copy() return 1 on success or 0 on error.
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X509_ALGOR_get0() and X509_ALGOR_set_md() return no values.
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X509_ALGOR_cmp() returns 0 if the two parameters have identical encodings and
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nonzero otherwise.
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=head1 HISTORY
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The X509_ALGOR_copy() was added in 1.1.1e.
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=head1 COPYRIGHT
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Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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