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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 \fBalg\fR. .PP \&\fBX509_ALGOR_set0()\fR sets the algorithm \s-1OID\s0 of \fBalg\fR to \fBaobj\fR and the associated parameter type to \fBptype\fR with value \fBpval\fR. If \fBptype\fR is \&\fBV_ASN1_UNDEF\fR the parameter is omitted, otherwise \fBptype\fR and \fBpval\fR have the same meaning as the \fBtype\fR and \fBvalue\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. .PP \&\fBX509_ALGOR_get0()\fR is the inverse of \fBX509_ALGOR_set0()\fR: it returns the algorithm \s-1OID\s0 in \fB*paobj\fR and the associated parameter in \fB*pptype\fR and \fB*ppval\fR from the \fBAlgorithmIdentifier\fR \fBalg\fR. .PP \&\fBX509_ALGOR_set_md()\fR sets the \fBAlgorithmIdentifier\fR \fBalg\fR to appropriate values for the message digest \fBmd\fR. .PP \&\fBX509_ALGOR_cmp()\fR compares \fBa\fR and \fBb\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\-2020 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (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>.