Android_verify/third_party/android-libs/share/man/man3/X509_ALGOR_dup.3ossl

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.\"
.IX Title "X509_ALGOR_DUP 3ossl"
.TH X509_ALGOR_DUP 3ossl "2024-09-03" "3.3.2" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
X509_ALGOR_dup,
X509_ALGOR_set0, X509_ALGOR_get0,
X509_ALGOR_set_md, X509_ALGOR_cmp,
X509_ALGOR_copy \- AlgorithmIdentifier functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBX509_ALGOR_dup()\fR returns a copy of \fIalg\fR.
.PP
\&\fBX509_ALGOR_set0()\fR sets the algorithm \s-1OID\s0 of \fIalg\fR to \fIaobj\fR and the
associated parameter type to \fIptype\fR with value \fIpval\fR. If \fIptype\fR is
\&\fBV_ASN1_UNDEF\fR the parameter is omitted, otherwise \fIptype\fR and \fIpval\fR have
the same meaning as the \fItype\fR and \fIvalue\fR parameters to \fBASN1_TYPE_set()\fR.
All the supplied parameters are used internally so must \fB\s-1NOT\s0\fR be freed after
this call succeeded;
otherwise ownership remains with the caller and \fIalg\fR remains untouched.
.PP
\&\fBX509_ALGOR_get0()\fR is the inverse of \fBX509_ALGOR_set0()\fR: it returns the
algorithm \s-1OID\s0 in \fI*paobj\fR and the associated parameter in \fI*pptype\fR
and \fI*ppval\fR from the \fBAlgorithmIdentifier\fR \fIalg\fR.
.PP
\&\fBX509_ALGOR_set_md()\fR sets the \fBAlgorithmIdentifier\fR \fIalg\fR to appropriate
values for the message digest \fImd\fR.
.PP
\&\fBX509_ALGOR_cmp()\fR compares \fIa\fR and \fIb\fR and returns 0 if they have identical
encodings and nonzero otherwise.
.PP
\&\fBX509_ALGOR_copy()\fR copies the source values into the dest structs; making
a duplicate of each (and free any thing pointed to from within *dest).
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBX509_ALGOR_dup()\fR returns a valid \fBX509_ALGOR\fR structure or \s-1NULL\s0 if an error
occurred.
.PP
\&\fBX509_ALGOR_set0()\fR and \fBX509_ALGOR_copy()\fR return 1 on success or 0 on error.
.PP
\&\fBX509_ALGOR_get0()\fR and \fBX509_ALGOR_set_md()\fR return no values.
.PP
\&\fBX509_ALGOR_cmp()\fR returns 0 if the two parameters have identical encodings and
nonzero otherwise.
.SH "HISTORY"
.IX Header "HISTORY"
The \fBX509_ALGOR_copy()\fR was added in 1.1.1e.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2002\-2022 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.