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.\" -*- mode: troff; coding: utf-8 -*-
.\" Automatically generated by Pod::Man 5.0102 (Pod::Simple 3.45)
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.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
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.\" output yourself in some meaningful fashion.
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.\" ========================================================================
.\"
.IX Title "PKCS12_GEN_MAC 3ossl"
.TH PKCS12_GEN_MAC 3ossl 2025-07-01 3.5.1 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
PKCS12_gen_mac, PKCS12_setup_mac, PKCS12_set_mac,
PKCS12_set_pbmac1_pbkdf2, PKCS12_verify_mac, PKCS12_get0_mac \-
Functions to create and manipulate a PKCS#12 MAC structure
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/pkcs12.h>
\&
\& int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen,
\& unsigned char *mac, unsigned int *maclen);
\& int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen);
\& int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen,
\& unsigned char *salt, int saltlen, int iter,
\& const EVP_MD *md_type);
\& int PKCS12_set_pbmac1_pbkdf2(PKCS12 *p12, const char *pass, int passlen,
\& unsigned char *salt, int saltlen, int iter,
\& const EVP_MD *md_type,
\& const char *prf_md_name);
\& int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt,
\& int saltlen, const EVP_MD *md_type);
\&
\& void PKCS12_get0_mac(const ASN1_OCTET_STRING **pmac,
\& const X509_ALGOR **pmacalg,
\& const ASN1_OCTET_STRING **psalt,
\& const ASN1_INTEGER **piter,
\& const PKCS12 *p12);
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
\&\fBPKCS12_gen_mac()\fR generates an HMAC over the entire PKCS#12 object using the
supplied password along with a set of already configured parameters.
The default key generation mechanism used is PKCS12KDF.
.PP
\&\fBPKCS12_verify_mac()\fR verifies the PKCS#12 object's HMAC using the supplied
password.
.PP
\&\fBPKCS12_setup_mac()\fR sets the MAC part of the PKCS#12 structure with the supplied
parameters.
.PP
\&\fBPKCS12_set_mac()\fR sets the MAC and MAC parameters into the PKCS#12 object.
\&\fBPKCS12_set_pbmac1_pbkdf2()\fR sets the MAC and MAC parameters into the PKCS#12
object when \fBPBMAC1\fR with PBKDF2 is used for protection of the PKCS#12 object.
.PP
\&\fIpass\fR is the passphrase to use in the HMAC. \fIsalt\fR is the salt value to use,
\&\fIiter\fR is the iteration count and \fImd_type\fR is the message digest function to
use. \fIprf_md_name\fR specifies the digest used for the PBKDF2 in PBMAC1 KDF.
.PP
\&\fBPKCS12_get0_mac()\fR retrieves any included MAC value, \fBX509_ALGOR\fR object,
\&\fIsalt\fR, and \fIiter\fR count from the PKCS12 object.
.SH NOTES
.IX Header "NOTES"
If \fIsalt\fR is NULL then a suitable salt will be generated and used.
.PP
If \fIiter\fR is 1 then an iteration count will be omitted from the PKCS#12
structure.
.PP
\&\fBPKCS12_gen_mac()\fR, \fBPKCS12_verify_mac()\fR, \fBPKCS12_set_mac()\fR and
\&\fBPKCS12_set_pbmac1_pbkdf2()\fR make assumptions regarding the encoding of the
given passphrase. See \fBpassphrase\-encoding\fR\|(7) for more information.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
All functions returning an integer return 1 on success and 0 if an error occurred.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
IETF RFC 7292 (<https://tools.ietf.org/html/rfc7292>)
IETF RFC 9579 (<https://tools.ietf.org/html/rfc9579>)
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBd2i_PKCS12\fR\|(3),
\&\fBEVP_KDF\-PKCS12KDF\fR\|(7),
\&\fBPKCS12_create\fR\|(3),
\&\fBpassphrase\-encoding\fR\|(7)
.SH HISTORY
.IX Header "HISTORY"
The \fIPKCS12_set_pbmac1_pbkdf2\fR function was added in OpenSSL 3.4.
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright 2021\-2024 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (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
<https://www.openssl.org/source/license.html>.
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