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https://github.com/openssl/openssl.git
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260 lines
8.1 KiB
C
260 lines
8.1 KiB
C
/*
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* Copyright 1999-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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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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#include "p12_local.h"
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/* PKCS#12 password change routine */
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static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass);
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static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
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const char *newpass,
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OSSL_LIB_CTX *libctx, const char *propq);
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static int newpass_bag(PKCS12_SAFEBAG *bag, const char *oldpass,
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const char *newpass,
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OSSL_LIB_CTX *libctx, const char *propq);
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static int alg_get(const X509_ALGOR *alg, int *pnid, int *piter,
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int *psaltlen, int *cipherid);
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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, const char *oldpass, const char *newpass)
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{
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/* Check for NULL PKCS12 structure */
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if (p12 == NULL) {
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ERR_raise(ERR_LIB_PKCS12, 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 (p12->mac != NULL) {
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if (!PKCS12_verify_mac(p12, oldpass, -1)) {
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ERR_raise(ERR_LIB_PKCS12, PKCS12_R_MAC_VERIFY_FAILURE);
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return 0;
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}
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}
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if (!newpass_p12(p12, oldpass, newpass)) {
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ERR_raise(ERR_LIB_PKCS12, 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, const char *oldpass, const char *newpass)
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{
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STACK_OF(PKCS7) *asafes = NULL, *newsafes = NULL;
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STACK_OF(PKCS12_SAFEBAG) *bags = NULL;
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int i, bagnid, pbe_nid = 0, pbe_iter = 0, pbe_saltlen = 0, cipherid = NID_undef;
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PKCS7 *p7, *p7new;
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ASN1_OCTET_STRING *p12_data_tmp = NULL, *macoct = NULL;
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unsigned char mac[EVP_MAX_MD_SIZE];
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unsigned int maclen;
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int rv = 0;
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if ((asafes = PKCS12_unpack_authsafes(p12)) == NULL)
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goto err;
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if ((newsafes = sk_PKCS7_new_null()) == NULL)
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goto err;
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for (i = 0; i < sk_PKCS7_num(asafes); i++) {
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p7 = sk_PKCS7_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 = PKCS12_unpack_p7data(p7);
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} else if (bagnid == NID_pkcs7_encrypted) {
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bags = PKCS12_unpack_p7encdata(p7, oldpass, -1);
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if (!alg_get(p7->d.encrypted->enc_data->algorithm,
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&pbe_nid, &pbe_iter, &pbe_saltlen, &cipherid))
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goto err;
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} else {
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continue;
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}
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if (bags == NULL)
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goto err;
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if (!newpass_bags(bags, oldpass, newpass,
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p7->ctx.libctx, p7->ctx.propq))
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goto err;
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/* Repack bag in same form with new password */
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if (bagnid == NID_pkcs7_data)
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p7new = PKCS12_pack_p7data(bags);
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else
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p7new = PKCS12_pack_p7encdata_ex(pbe_nid, newpass, -1, NULL,
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pbe_saltlen, pbe_iter, bags,
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p7->ctx.libctx, p7->ctx.propq);
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if (p7new == NULL || !sk_PKCS7_push(newsafes, p7new))
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goto err;
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sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
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bags = NULL;
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}
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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()) == NULL)
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goto err;
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if (!PKCS12_pack_authsafes(p12, newsafes))
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goto err;
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if (p12->mac != NULL) {
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if (!PKCS12_gen_mac(p12, newpass, -1, mac, &maclen))
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goto err;
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X509_SIG_getm(p12->mac->dinfo, NULL, &macoct);
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if (!ASN1_OCTET_STRING_set(macoct, mac, maclen))
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goto err;
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}
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rv = 1;
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err:
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/* Restore old safe if necessary */
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if (rv == 1) {
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ASN1_OCTET_STRING_free(p12_data_tmp);
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} else if (p12_data_tmp != NULL) {
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ASN1_OCTET_STRING_free(p12->authsafes->d.data);
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p12->authsafes->d.data = p12_data_tmp;
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}
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sk_PKCS12_SAFEBAG_pop_free(bags, PKCS12_SAFEBAG_free);
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sk_PKCS7_pop_free(asafes, PKCS7_free);
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sk_PKCS7_pop_free(newsafes, PKCS7_free);
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return rv;
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}
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static int newpass_bags(STACK_OF(PKCS12_SAFEBAG) *bags, const char *oldpass,
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const char *newpass,
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OSSL_LIB_CTX *libctx, const char *propq)
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{
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int i;
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for (i = 0; i < sk_PKCS12_SAFEBAG_num(bags); i++) {
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if (!newpass_bag(sk_PKCS12_SAFEBAG_value(bags, i), oldpass, newpass,
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libctx, propq))
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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, const char *oldpass,
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const char *newpass,
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OSSL_LIB_CTX *libctx, const char *propq)
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{
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EVP_CIPHER *cipher = NULL;
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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, cipherid = 0;
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const X509_ALGOR *shalg;
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if (PKCS12_SAFEBAG_get_nid(bag) != NID_pkcs8ShroudedKeyBag)
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return 1;
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if ((p8 = PKCS8_decrypt_ex(bag->value.shkeybag, oldpass, -1,
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libctx, propq)) == NULL)
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return 0;
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X509_SIG_get0(bag->value.shkeybag, &shalg, NULL);
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if (!alg_get(shalg, &p8_nid, &p8_iter, &p8_saltlen, &cipherid)) {
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PKCS8_PRIV_KEY_INFO_free(p8);
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return 0;
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}
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if (cipherid != NID_undef) {
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cipher = EVP_CIPHER_fetch(libctx, OBJ_nid2sn(cipherid), propq);
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if (cipher == NULL) {
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PKCS8_PRIV_KEY_INFO_free(p8);
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return 0;
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}
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}
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p8new = PKCS8_encrypt_ex(p8_nid, cipher, newpass, -1, NULL, p8_saltlen,
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p8_iter, p8, libctx, propq);
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PKCS8_PRIV_KEY_INFO_free(p8);
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EVP_CIPHER_free(cipher);
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if (p8new == NULL)
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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(const X509_ALGOR *alg, int *pnid, int *piter,
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int *psaltlen, int *cipherid)
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{
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int ret = 0, pbenid, aparamtype;
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int encnid, prfnid;
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const ASN1_OBJECT *aoid;
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const void *aparam;
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PBEPARAM *pbe = NULL;
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PBE2PARAM *pbe2 = NULL;
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PBKDF2PARAM *kdf = NULL;
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X509_ALGOR_get0(&aoid, &aparamtype, &aparam, alg);
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pbenid = OBJ_obj2nid(aoid);
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switch (pbenid) {
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case NID_pbes2:
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if (aparamtype == V_ASN1_SEQUENCE)
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pbe2 = ASN1_item_unpack(aparam, ASN1_ITEM_rptr(PBE2PARAM));
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if (pbe2 == NULL)
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goto done;
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X509_ALGOR_get0(&aoid, &aparamtype, &aparam, pbe2->keyfunc);
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pbenid = OBJ_obj2nid(aoid);
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X509_ALGOR_get0(&aoid, NULL, NULL, pbe2->encryption);
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encnid = OBJ_obj2nid(aoid);
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if (aparamtype == V_ASN1_SEQUENCE)
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kdf = ASN1_item_unpack(aparam, ASN1_ITEM_rptr(PBKDF2PARAM));
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if (kdf == NULL)
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goto done;
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/* Only OCTET_STRING is supported */
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if (kdf->salt->type != V_ASN1_OCTET_STRING)
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goto done;
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if (kdf->prf == NULL) {
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prfnid = NID_hmacWithSHA1;
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} else {
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X509_ALGOR_get0(&aoid, NULL, NULL, kdf->prf);
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prfnid = OBJ_obj2nid(aoid);
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}
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*psaltlen = kdf->salt->value.octet_string->length;
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*piter = ASN1_INTEGER_get(kdf->iter);
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*pnid = prfnid;
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*cipherid = encnid;
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break;
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default:
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pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), alg->parameter);
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if (pbe == NULL)
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goto done;
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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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*cipherid = NID_undef;
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ret = 1;
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break;
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}
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ret = 1;
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done:
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if (kdf != NULL)
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PBKDF2PARAM_free(kdf);
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if (pbe2 != NULL)
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PBE2PARAM_free(pbe2);
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if (pbe != NULL)
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PBEPARAM_free(pbe);
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return ret;
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}
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