/* * Copyright 1999-2018 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 */ #include #include "internal/cryptlib.h" #include #include #include #include #include "p12_local.h" int PKCS12_mac_present(const PKCS12 *p12) { return p12->mac ? 1 : 0; } 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) { if (p12->mac) { X509_SIG_get0(p12->mac->dinfo, pmacalg, pmac); if (psalt) *psalt = p12->mac->salt; if (piter) *piter = p12->mac->iter; } else { if (pmac) *pmac = NULL; if (pmacalg) *pmacalg = NULL; if (psalt) *psalt = NULL; if (piter) *piter = NULL; } } #define TK26_MAC_KEY_LEN 32 static int pkcs12_gen_gost_mac_key(const char *pass, int passlen, const unsigned char *salt, int saltlen, int iter, int keylen, unsigned char *key, const EVP_MD *digest) { unsigned char out[96]; if (keylen != TK26_MAC_KEY_LEN) { return 0; } if (!PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, iter, digest, sizeof(out), out)) { return 0; } memcpy(key, out + sizeof(out) - TK26_MAC_KEY_LEN, TK26_MAC_KEY_LEN); OPENSSL_cleanse(out, sizeof(out)); return 1; } /* Generate a MAC */ static int pkcs12_gen_mac(PKCS12 *p12, const char *pass, int passlen, unsigned char *mac, unsigned int *maclen, int (*pkcs12_key_gen)(const char *pass, int passlen, unsigned char *salt, int slen, int id, int iter, int n, unsigned char *out, const EVP_MD *md_type)) { int ret = 0; const EVP_MD *md_type; HMAC_CTX *hmac = NULL; unsigned char key[EVP_MAX_MD_SIZE], *salt; int saltlen, iter; int md_size = 0; int md_type_nid; const X509_ALGOR *macalg; const ASN1_OBJECT *macoid; if (pkcs12_key_gen == NULL) pkcs12_key_gen = PKCS12_key_gen_utf8; if (!PKCS7_type_is_data(p12->authsafes)) { PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_CONTENT_TYPE_NOT_DATA); return 0; } salt = p12->mac->salt->data; saltlen = p12->mac->salt->length; if (p12->mac->iter == NULL) iter = 1; else iter = ASN1_INTEGER_get(p12->mac->iter); X509_SIG_get0(p12->mac->dinfo, &macalg, NULL); X509_ALGOR_get0(&macoid, NULL, NULL, macalg); if ((md_type = EVP_get_digestbyobj(macoid)) == NULL) { PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_UNKNOWN_DIGEST_ALGORITHM); return 0; } md_size = EVP_MD_size(md_type); md_type_nid = EVP_MD_type(md_type); if (md_size < 0) return 0; if ((md_type_nid == NID_id_GostR3411_94 || md_type_nid == NID_id_GostR3411_2012_256 || md_type_nid == NID_id_GostR3411_2012_512) && ossl_safe_getenv("LEGACY_GOST_PKCS12") == NULL) { md_size = TK26_MAC_KEY_LEN; if (!pkcs12_gen_gost_mac_key(pass, passlen, salt, saltlen, iter, md_size, key, md_type)) { PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR); goto err; } } else if (!(*pkcs12_key_gen)(pass, passlen, salt, saltlen, PKCS12_MAC_ID, iter, md_size, key, md_type)) { PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_KEY_GEN_ERROR); goto err; } if ((hmac = HMAC_CTX_new()) == NULL || !HMAC_Init_ex(hmac, key, md_size, md_type, NULL) || !HMAC_Update(hmac, p12->authsafes->d.data->data, p12->authsafes->d.data->length) || !HMAC_Final(hmac, mac, maclen)) { goto err; } ret = 1; err: OPENSSL_cleanse(key, sizeof(key)); HMAC_CTX_free(hmac); return ret; } int PKCS12_gen_mac(PKCS12 *p12, const char *pass, int passlen, unsigned char *mac, unsigned int *maclen) { return pkcs12_gen_mac(p12, pass, passlen, mac, maclen, NULL); } /* Verify the mac */ int PKCS12_verify_mac(PKCS12 *p12, const char *pass, int passlen) { unsigned char mac[EVP_MAX_MD_SIZE]; unsigned int maclen; const ASN1_OCTET_STRING *macoct; if (p12->mac == NULL) { PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_ABSENT); return 0; } if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, PKCS12_key_gen_utf8)) { PKCS12err(PKCS12_F_PKCS12_VERIFY_MAC, PKCS12_R_MAC_GENERATION_ERROR); return 0; } X509_SIG_get0(p12->mac->dinfo, NULL, &macoct); if ((maclen != (unsigned int)ASN1_STRING_length(macoct)) || CRYPTO_memcmp(mac, ASN1_STRING_get0_data(macoct), maclen) != 0) return 0; return 1; } /* Set a mac */ int PKCS12_set_mac(PKCS12 *p12, const char *pass, int passlen, unsigned char *salt, int saltlen, int iter, const EVP_MD *md_type) { unsigned char mac[EVP_MAX_MD_SIZE]; unsigned int maclen; ASN1_OCTET_STRING *macoct; if (!md_type) md_type = EVP_sha1(); if (PKCS12_setup_mac(p12, iter, salt, saltlen, md_type) == PKCS12_ERROR) { PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_SETUP_ERROR); return 0; } /* * Note that output mac is forced to UTF-8... */ if (!pkcs12_gen_mac(p12, pass, passlen, mac, &maclen, PKCS12_key_gen_utf8)) { PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_GENERATION_ERROR); return 0; } X509_SIG_getm(p12->mac->dinfo, NULL, &macoct); if (!ASN1_OCTET_STRING_set(macoct, mac, maclen)) { PKCS12err(PKCS12_F_PKCS12_SET_MAC, PKCS12_R_MAC_STRING_SET_ERROR); return 0; } return 1; } /* Set up a mac structure */ int PKCS12_setup_mac(PKCS12 *p12, int iter, unsigned char *salt, int saltlen, const EVP_MD *md_type) { X509_ALGOR *macalg; PKCS12_MAC_DATA_free(p12->mac); p12->mac = NULL; if ((p12->mac = PKCS12_MAC_DATA_new()) == NULL) return PKCS12_ERROR; if (iter > 1) { if ((p12->mac->iter = ASN1_INTEGER_new()) == NULL) { PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); return 0; } if (!ASN1_INTEGER_set(p12->mac->iter, iter)) { PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); return 0; } } if (!saltlen) saltlen = PKCS12_SALT_LEN; if ((p12->mac->salt->data = OPENSSL_malloc(saltlen)) == NULL) { PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); return 0; } p12->mac->salt->length = saltlen; if (!salt) { if (RAND_bytes(p12->mac->salt->data, saltlen) <= 0) return 0; } else memcpy(p12->mac->salt->data, salt, saltlen); X509_SIG_getm(p12->mac->dinfo, &macalg, NULL); if (!X509_ALGOR_set0(macalg, OBJ_nid2obj(EVP_MD_type(md_type)), V_ASN1_NULL, NULL)) { PKCS12err(PKCS12_F_PKCS12_SETUP_MAC, ERR_R_MALLOC_FAILURE); return 0; } return 1; }