A local copy of OpenSSL from GitHub
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/* p12_npas.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
* project 1999.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/pkcs12.h>
/* PKCS#12 password change routine */
static int newpass_p12(PKCS12 *p12, char *oldpass, char *newpass);
static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass,
char *newpass);
static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass);
static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen);
/*
* Change the password on a PKCS#12 structure.
*/
int PKCS12_newpass(PKCS12 *p12, char *oldpass, char *newpass)
{
/* Check for NULL PKCS12 structure */
if(!p12) {
PKCS12err(PKCS12_F_PKCS12_NEWPASS,PKCS12_R_INVALID_NULL_PKCS12_POINTER);
return 0;
}
/* Check the mac */
if (!PKCS12_verify_mac(p12, oldpass, -1)) {
PKCS12err(PKCS12_F_PKCS12_NEWPASS,PKCS12_R_MAC_VERIFY_FAILURE);
return 0;
}
if (!newpass_p12(p12, oldpass, newpass)) {
PKCS12err(PKCS12_F_PKCS12_NEWPASS,PKCS12_R_PARSE_ERROR);
return 0;
}
return 1;
}
/* Parse the outer PKCS#12 structure */
static int newpass_p12(PKCS12 *p12, char *oldpass, char *newpass)
{
STACK *asafes, *newsafes;
STACK_OF(PKCS12_SAFEBAG) *bags;
int i, bagnid, pbe_nid, pbe_iter, pbe_saltlen;
PKCS7 *p7, *p7new;
ASN1_OCTET_STRING *p12_data_tmp = NULL, *macnew = NULL;
unsigned char mac[EVP_MAX_MD_SIZE];
unsigned int maclen;
if (!(asafes = M_PKCS12_unpack_authsafes(p12))) return 0;
if(!(newsafes = sk_new(NULL))) return 0;
for (i = 0; i < sk_num (asafes); i++) {
p7 = (PKCS7 *) sk_value(asafes, i);
bagnid = OBJ_obj2nid(p7->type);
if (bagnid == NID_pkcs7_data) {
bags = M_PKCS12_unpack_p7data(p7);
} else if (bagnid == NID_pkcs7_encrypted) {
bags = M_PKCS12_unpack_p7encdata(p7, oldpass, -1);
alg_get(p7->d.encrypted->enc_data->algorithm,
&pbe_nid, &pbe_iter, &pbe_saltlen);
} else continue;
if (!bags) {
sk_pop_free(asafes, (void(*)(void *)) PKCS7_free);
return 0;
}
if (!newpass_bags(bags, oldpass, newpass)) {
sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
sk_pop_free(asafes, (void(*)(void *)) PKCS7_free);
return 0;
}
/* Repack bag in same form with new password */
if (bagnid == NID_pkcs7_data) p7new = PKCS12_pack_p7data(bags);
else p7new = PKCS12_pack_p7encdata(pbe_nid, newpass, -1, NULL,
pbe_saltlen, pbe_iter, bags);
sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
if(!p7new) {
sk_pop_free(asafes, (void(*)(void *)) PKCS7_free);
return 0;
}
sk_push(newsafes, (char *)p7new);
}
sk_pop_free(asafes, (void(*)(void *)) PKCS7_free);
/* Repack safe: save old safe in case of error */
p12_data_tmp = p12->authsafes->d.data;
if(!(p12->authsafes->d.data = ASN1_OCTET_STRING_new())) goto saferr;
if(!M_PKCS12_pack_authsafes(p12, newsafes)) goto saferr;
if(!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen)) goto saferr;
if(!(macnew = ASN1_OCTET_STRING_new())) goto saferr;
if(!ASN1_OCTET_STRING_set(macnew, mac, maclen)) goto saferr;
ASN1_OCTET_STRING_free(p12->mac->dinfo->digest);
p12->mac->dinfo->digest = macnew;
ASN1_OCTET_STRING_free(p12_data_tmp);
return 1;
saferr:
/* Restore old safe */
ASN1_OCTET_STRING_free(p12->authsafes->d.data);
ASN1_OCTET_STRING_free(macnew);
p12->authsafes->d.data = p12_data_tmp;
return 0;
}
static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, char *oldpass,
char *newpass)
{
int i;
for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i),
oldpass, newpass))
return 0;
}
return 1;
}
/* Change password of safebag: only needs handle shrouded keybags */
static int newpass_bag(PKCS12_SAFEBAG *bag, char *oldpass, char *newpass)
{
PKCS8_PRIV_KEY_INFO *p8;
X509_SIG *p8new;
int p8_nid, p8_saltlen, p8_iter;
if(M_PKCS12_bag_type(bag) != NID_pkcs8ShroudedKeyBag) return 1;
if (!(p8 = M_PKCS12_decrypt_skey(bag, oldpass, -1))) return 0;
alg_get(bag->value.shkeybag->algor, &p8_nid, &p8_iter, &p8_saltlen);
if(!(p8new = PKCS8_encrypt(p8_nid, NULL, newpass, -1, NULL, p8_saltlen,
p8_iter, p8))) return 0;
X509_SIG_free(bag->value.shkeybag);
bag->value.shkeybag = p8new;
return 1;
}
static int alg_get(X509_ALGOR *alg, int *pnid, int *piter, int *psaltlen)
{
PBEPARAM *pbe;
unsigned char *p;
p = alg->parameter->value.sequence->data;
pbe = d2i_PBEPARAM(NULL, &p, alg->parameter->value.sequence->length);
*pnid = OBJ_obj2nid(alg->algorithm);
*piter = ASN1_INTEGER_get(pbe->iter);
*psaltlen = pbe->salt->length;
PBEPARAM_free(pbe);
return 0;
}