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.\" ========================================================================
.\"
.IX Title "OSSL_CMP_ITAV_SET0 3ossl"
.TH OSSL_CMP_ITAV_SET0 3ossl "2023-09-19" "3.0.11" "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"
OSSL_CMP_ITAV_create,
OSSL_CMP_ITAV_set0,
OSSL_CMP_ITAV_get0_type,
OSSL_CMP_ITAV_get0_value,
OSSL_CMP_ITAV_push0_stack_item
\&\- OSSL_CMP_ITAV utility functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 6
\&  #include <openssl/cmp.h>
\&  OSSL_CMP_ITAV *OSSL_CMP_ITAV_create(ASN1_OBJECT *type, ASN1_TYPE *value);
\&  void OSSL_CMP_ITAV_set0(OSSL_CMP_ITAV *itav, ASN1_OBJECT *type,
\&                          ASN1_TYPE *value);
\&  ASN1_OBJECT *OSSL_CMP_ITAV_get0_type(const OSSL_CMP_ITAV *itav);
\&  ASN1_TYPE *OSSL_CMP_ITAV_get0_value(const OSSL_CMP_ITAV *itav);
\&
\&  int OSSL_CMP_ITAV_push0_stack_item(STACK_OF(OSSL_CMP_ITAV) **itav_sk_p,
\&                                     OSSL_CMP_ITAV *itav);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Certificate Management Protocol (\s-1CMP, RFC 4210\s0) extension to OpenSSL
.PP
\&\s-1ITAV\s0 is short for InfoTypeAndValue. This type is defined in \s-1RFC 4210\s0
section 5.3.19 and Appendix F. It is used at various places in \s-1CMP\s0 messages,
e.g., in the generalInfo PKIHeader field, to hold a key-value pair.
.PP
\&\fBOSSL_CMP_ITAV_create()\fR creates a new \fB\s-1OSSL_CMP_ITAV\s0\fR structure and fills it in.
It combines \fBOSSL_CMP_ITAV_new()\fR and \fBOSSL_CMP_ITAV_set0()\fR.
.PP
\&\fBOSSL_CMP_ITAV_set0()\fR sets the \fIitav\fR with an infoType of \fItype\fR and an
infoValue of \fIvalue\fR. This function uses the pointers \fItype\fR and \fIvalue\fR
internally, so they must \fBnot\fR be freed up after the call.
.PP
\&\fBOSSL_CMP_ITAV_get0_type()\fR returns a direct pointer to the infoType in the
\&\fIitav\fR.
.PP
\&\fBOSSL_CMP_ITAV_get0_value()\fR returns a direct pointer to the infoValue in
the \fIitav\fR as generic \fB\s-1ASN1_TYPE\s0\fR pointer.
.PP
\&\fBOSSL_CMP_ITAV_push0_stack_item()\fR pushes \fIitav\fR to the stack pointed to
by \fI*itav_sk_p\fR. It creates a new stack if \fI*itav_sk_p\fR points to \s-1NULL.\s0
.SH "NOTES"
.IX Header "NOTES"
\&\s-1CMP\s0 is defined in \s-1RFC 4210\s0 (and \s-1CRMF\s0 in \s-1RFC 4211\s0).
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBOSSL_CMP_ITAV_create()\fR returns a pointer to the \s-1ITAV\s0 structure on success,
or \s-1NULL\s0 on error.
.PP
\&\fBOSSL_CMP_ITAV_set0()\fR does not return a value.
.PP
\&\fBOSSL_CMP_ITAV_get0_type()\fR and \fBOSSL_CMP_ITAV_get0_value()\fR
return the respective pointer or \s-1NULL\s0 if their input is \s-1NULL.\s0
.PP
\&\fBOSSL_CMP_ITAV_push0_stack_item()\fR returns 1 on success, 0 on error.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
The following code creates and sets a structure representing a generic
InfoTypeAndValue sequence, using an \s-1OID\s0 created from text as type, and an
integer as value. Afterwards, it is pushed to the \fB\s-1OSSL_CMP_CTX\s0\fR to be later
included in the requests' PKIHeader's genInfo field.
.PP
.Vb 2
\&    ASN1_OBJECT *type = OBJ_txt2obj("1.2.3.4.5", 1);
\&    if (type == NULL) ...
\&
\&    ASN1_INTEGER *asn1int = ASN1_INTEGER_new();
\&    if (asn1int == NULL || !ASN1_INTEGER_set(asn1int, 12345)) ...
\&
\&    ASN1_TYPE *val = ASN1_TYPE_new();
\&    if (val == NULL) ...
\&    ASN1_TYPE_set(val, V_ASN1_INTEGER, asn1int);
\&
\&    OSSL_CMP_ITAV *itav = OSSL_CMP_ITAV_create(type, val);
\&    if (itav == NULL) ...
\&
\&    OSSL_CMP_CTX *ctx = OSSL_CMP_CTX_new();
\&    if (ctx == NULL || !OSSL_CMP_CTX_geninfo_push0_ITAV(ctx, itav)) {
\&        OSSL_CMP_ITAV_free(itav); /* also frees type and val */
\&        goto err;
\&    }
\&
\&    ...
\&
\&    OSSL_CMP_CTX_free(ctx); /* also frees itav */
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBOSSL_CMP_CTX_new\fR\|(3), \fBOSSL_CMP_CTX_free\fR\|(3), \fBASN1_TYPE_set\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The OpenSSL \s-1CMP\s0 support was added in OpenSSL 3.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2007\-2021 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>.