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