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.\" ========================================================================
.\"
.IX Title "PKCS12_GEN_MAC 3ossl"
.TH PKCS12_GEN_MAC 3ossl "2024-09-03" "3.1.7+quic" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
PKCS12_gen_mac, PKCS12_setup_mac, PKCS12_set_mac,
PKCS12_verify_mac \- Functions to create and manipulate a PKCS#12 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_setup_mac(PKCS12 *p12, int iter, unsigned char *salt,
\&                      int saltlen, const EVP_MD *md_type);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBPKCS12_gen_mac()\fR generates an \s-1HMAC\s0 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 \s-1PKCS12KDF.\s0
.PP
\&\fBPKCS12_verify_mac()\fR verifies the PKCS#12 object's \s-1HMAC\s0 using the supplied
password.
.PP
\&\fBPKCS12_setup_mac()\fR sets the \s-1MAC\s0 part of the PKCS#12 structure with the supplied
parameters.
.PP
\&\fBPKCS12_set_mac()\fR sets the \s-1MAC\s0 and \s-1MAC\s0 parameters into the PKCS#12 object.
.PP
\&\fIpass\fR is the passphrase to use in the \s-1HMAC.\s0 \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.
.SH "NOTES"
.IX Header "NOTES"
If \fIsalt\fR is \s-1NULL\s0 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 and \fBPKCS12_set_mac()\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 return 1 on success and 0 if an error occurred.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
\&\s-1IETF RFC 7292\s0 (<https://tools.ietf.org/html/rfc7292>)
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBd2i_PKCS12\fR\|(3),
\&\s-1\fBEVP_KDF\-PKCS12KDF\s0\fR\|(7),
\&\fBPKCS12_create\fR\|(3),
\&\fBpassphrase\-encoding\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2021\-2023 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>.