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PKCS12_GEN_MAC(3ossl)               OpenSSL              PKCS12_GEN_MAC(3ossl)



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


SYNOPSIS

        #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);


DESCRIPTION

       PKCS12_gen_mac(3) 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.

       PKCS12_verify_mac() verifies the PKCS#12 object's HMAC using the
       supplied password.

       PKCS12_setup_mac() sets the MAC part of the PKCS#12 structure with the
       supplied parameters.

       PKCS12_set_mac() sets the MAC and MAC parameters into the PKCS#12
       object.  PKCS12_set_pbmac1_pbkdf2() sets the MAC and MAC parameters
       into the PKCS#12 object when PBMAC1 with PBKDF2 is used for protection
       of the PKCS#12 object.

       pass is the passphrase to use in the HMAC. salt is the salt value to
       use, iter is the iteration count and md_type is the message digest
       function to use. prf_md_name specifies the digest used for the PBKDF2
       in PBMAC1 KDF.

       PKCS12_get0_mac() retrieves any included MAC value, X509_ALGOR object,
       salt, and iter count from the PKCS12 object.


NOTES

       If salt is NULL then a suitable salt will be generated and used.

       If iter is 1 then an iteration count will be omitted from the PKCS#12
       structure.

       PKCS12_gen_mac(3), PKCS12_verify_mac(), PKCS12_set_mac() and
       PKCS12_set_pbmac1_pbkdf2() make assumptions regarding the encoding of
       the given passphrase. See passphrase-encoding(7) for more information.


RETURN VALUES

       All functions returning an integer return 1 on success and 0 if an
       error occurred.


CONFORMING TO

       IETF RFC 7292 (<https://tools.ietf.org/html/rfc7292>) IETF RFC 9579
       (<https://tools.ietf.org/html/rfc9579>)


SEE ALSO

       d2i_PKCS12(3), EVP_KDF-PKCS12KDF(7), PKCS12_create(3),
       passphrase-encoding(7)


HISTORY

       The PKCS12_set_pbmac1_pbkdf2 function was added in OpenSSL 3.4.


COPYRIGHT

       Copyright 2021-2024 The OpenSSL Project Authors. All Rights Reserved.

       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>.

3.4.0                             2024-10-29             PKCS12_GEN_MAC(3ossl)

openssl 3.4.0 - Generated Thu Nov 14 07:58:48 CST 2024
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