| /* |
| * PKCS#12 Personal Information Exchange Syntax |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * The PKCS #12 Personal Information Exchange Syntax Standard v1.1 |
| * |
| * http://www.rsa.com/rsalabs/pkcs/files/h11301-wp-pkcs-12v1-1-personal-information-exchange-syntax.pdf |
| * ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12v1-1.asn |
| */ |
| |
| #include "common.h" |
| |
| #if defined(MBEDTLS_PKCS12_C) |
| |
| #include "mbedtls/pkcs12.h" |
| #include "mbedtls/asn1.h" |
| #include "mbedtls/cipher.h" |
| #include "mbedtls/platform_util.h" |
| #include "mbedtls/error.h" |
| |
| #include <string.h> |
| |
| #if !defined(MBEDTLS_MD_C) |
| #include "mbedtls/psa_util.h" |
| #define PSA_TO_MBEDTLS_ERR(status) PSA_TO_MBEDTLS_ERR_LIST(status, \ |
| psa_to_md_errors, \ |
| psa_generic_status_to_mbedtls) |
| #endif |
| |
| #if defined(MBEDTLS_DES_C) |
| #include "mbedtls/des.h" |
| #endif |
| |
| #include "hash_info.h" |
| #include "mbedtls/psa_util.h" |
| |
| #if defined(MBEDTLS_ASN1_PARSE_C) |
| |
| static int pkcs12_parse_pbe_params(mbedtls_asn1_buf *params, |
| mbedtls_asn1_buf *salt, int *iterations) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| unsigned char **p = ¶ms->p; |
| const unsigned char *end = params->p + params->len; |
| |
| /* |
| * pkcs-12PbeParams ::= SEQUENCE { |
| * salt OCTET STRING, |
| * iterations INTEGER |
| * } |
| * |
| */ |
| if (params->tag != (MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) { |
| return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT, |
| MBEDTLS_ERR_ASN1_UNEXPECTED_TAG); |
| } |
| |
| if ((ret = mbedtls_asn1_get_tag(p, end, &salt->len, MBEDTLS_ASN1_OCTET_STRING)) != 0) { |
| return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT, ret); |
| } |
| |
| salt->p = *p; |
| *p += salt->len; |
| |
| if ((ret = mbedtls_asn1_get_int(p, end, iterations)) != 0) { |
| return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT, ret); |
| } |
| |
| if (*p != end) { |
| return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PKCS12_PBE_INVALID_FORMAT, |
| MBEDTLS_ERR_ASN1_LENGTH_MISMATCH); |
| } |
| |
| return 0; |
| } |
| |
| #define PKCS12_MAX_PWDLEN 128 |
| |
| static int pkcs12_pbe_derive_key_iv(mbedtls_asn1_buf *pbe_params, mbedtls_md_type_t md_type, |
| const unsigned char *pwd, size_t pwdlen, |
| unsigned char *key, size_t keylen, |
| unsigned char *iv, size_t ivlen) |
| { |
| int ret, iterations = 0; |
| mbedtls_asn1_buf salt; |
| size_t i; |
| unsigned char unipwd[PKCS12_MAX_PWDLEN * 2 + 2]; |
| |
| if (pwdlen > PKCS12_MAX_PWDLEN) { |
| return MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA; |
| } |
| |
| memset(&salt, 0, sizeof(mbedtls_asn1_buf)); |
| memset(&unipwd, 0, sizeof(unipwd)); |
| |
| if ((ret = pkcs12_parse_pbe_params(pbe_params, &salt, |
| &iterations)) != 0) { |
| return ret; |
| } |
| |
| for (i = 0; i < pwdlen; i++) { |
| unipwd[i * 2 + 1] = pwd[i]; |
| } |
| |
| if ((ret = mbedtls_pkcs12_derivation(key, keylen, unipwd, pwdlen * 2 + 2, |
| salt.p, salt.len, md_type, |
| MBEDTLS_PKCS12_DERIVE_KEY, iterations)) != 0) { |
| return ret; |
| } |
| |
| if (iv == NULL || ivlen == 0) { |
| return 0; |
| } |
| |
| if ((ret = mbedtls_pkcs12_derivation(iv, ivlen, unipwd, pwdlen * 2 + 2, |
| salt.p, salt.len, md_type, |
| MBEDTLS_PKCS12_DERIVE_IV, iterations)) != 0) { |
| return ret; |
| } |
| return 0; |
| } |
| |
| #undef PKCS12_MAX_PWDLEN |
| |
| int mbedtls_pkcs12_pbe(mbedtls_asn1_buf *pbe_params, int mode, |
| mbedtls_cipher_type_t cipher_type, mbedtls_md_type_t md_type, |
| const unsigned char *pwd, size_t pwdlen, |
| const unsigned char *data, size_t len, |
| unsigned char *output) |
| { |
| int ret, keylen = 0; |
| unsigned char key[32]; |
| unsigned char iv[16]; |
| const mbedtls_cipher_info_t *cipher_info; |
| mbedtls_cipher_context_t cipher_ctx; |
| size_t olen = 0; |
| |
| if (pwd == NULL && pwdlen != 0) { |
| return MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA; |
| } |
| |
| cipher_info = mbedtls_cipher_info_from_type(cipher_type); |
| if (cipher_info == NULL) { |
| return MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE; |
| } |
| |
| keylen = cipher_info->key_bitlen / 8; |
| |
| if ((ret = pkcs12_pbe_derive_key_iv(pbe_params, md_type, pwd, pwdlen, |
| key, keylen, |
| iv, cipher_info->iv_size)) != 0) { |
| return ret; |
| } |
| |
| mbedtls_cipher_init(&cipher_ctx); |
| |
| if ((ret = mbedtls_cipher_setup(&cipher_ctx, cipher_info)) != 0) { |
| goto exit; |
| } |
| |
| if ((ret = |
| mbedtls_cipher_setkey(&cipher_ctx, key, 8 * keylen, |
| (mbedtls_operation_t) mode)) != 0) { |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_cipher_set_iv(&cipher_ctx, iv, cipher_info->iv_size)) != 0) { |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_cipher_reset(&cipher_ctx)) != 0) { |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_cipher_update(&cipher_ctx, data, len, |
| output, &olen)) != 0) { |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_cipher_finish(&cipher_ctx, output + olen, &olen)) != 0) { |
| ret = MBEDTLS_ERR_PKCS12_PASSWORD_MISMATCH; |
| } |
| |
| exit: |
| mbedtls_platform_zeroize(key, sizeof(key)); |
| mbedtls_platform_zeroize(iv, sizeof(iv)); |
| mbedtls_cipher_free(&cipher_ctx); |
| |
| return ret; |
| } |
| |
| #endif /* MBEDTLS_ASN1_PARSE_C */ |
| |
| static void pkcs12_fill_buffer(unsigned char *data, size_t data_len, |
| const unsigned char *filler, size_t fill_len) |
| { |
| unsigned char *p = data; |
| size_t use_len; |
| |
| if (filler != NULL && fill_len != 0) { |
| while (data_len > 0) { |
| use_len = (data_len > fill_len) ? fill_len : data_len; |
| memcpy(p, filler, use_len); |
| p += use_len; |
| data_len -= use_len; |
| } |
| } else { |
| /* If either of the above are not true then clearly there is nothing |
| * that this function can do. The function should *not* be called |
| * under either of those circumstances, as you could end up with an |
| * incorrect output but for safety's sake, leaving the check in as |
| * otherwise we could end up with memory corruption.*/ |
| } |
| } |
| |
| |
| static int calculate_hashes(mbedtls_md_type_t md_type, int iterations, |
| unsigned char *diversifier, unsigned char *salt_block, |
| unsigned char *pwd_block, unsigned char *hash_output, int use_salt, |
| int use_password, size_t hlen, size_t v) |
| { |
| #if defined(MBEDTLS_MD_C) |
| int ret = -1; |
| size_t i; |
| const mbedtls_md_info_t *md_info; |
| mbedtls_md_context_t md_ctx; |
| md_info = mbedtls_md_info_from_type(md_type); |
| if (md_info == NULL) { |
| return MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE; |
| } |
| |
| mbedtls_md_init(&md_ctx); |
| |
| if ((ret = mbedtls_md_setup(&md_ctx, md_info, 0)) != 0) { |
| return ret; |
| } |
| // Calculate hash( diversifier || salt_block || pwd_block ) |
| if ((ret = mbedtls_md_starts(&md_ctx)) != 0) { |
| goto exit; |
| } |
| |
| if ((ret = mbedtls_md_update(&md_ctx, diversifier, v)) != 0) { |
| goto exit; |
| } |
| |
| if (use_salt != 0) { |
| if ((ret = mbedtls_md_update(&md_ctx, salt_block, v)) != 0) { |
| goto exit; |
| } |
| } |
| |
| if (use_password != 0) { |
| if ((ret = mbedtls_md_update(&md_ctx, pwd_block, v)) != 0) { |
| goto exit; |
| } |
| } |
| |
| if ((ret = mbedtls_md_finish(&md_ctx, hash_output)) != 0) { |
| goto exit; |
| } |
| |
| // Perform remaining ( iterations - 1 ) recursive hash calculations |
| for (i = 1; i < (size_t) iterations; i++) { |
| if ((ret = mbedtls_md(md_info, hash_output, hlen, hash_output)) |
| != 0) { |
| goto exit; |
| } |
| } |
| |
| exit: |
| mbedtls_md_free(&md_ctx); |
| return ret; |
| #else |
| psa_hash_operation_t op = PSA_HASH_OPERATION_INIT; |
| psa_algorithm_t alg = mbedtls_psa_translate_md(md_type); |
| psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED; |
| psa_status_t status_abort = PSA_ERROR_CORRUPTION_DETECTED; |
| size_t i, out_len, out_size = PSA_HASH_LENGTH(alg); |
| |
| if (alg == PSA_ALG_NONE) { |
| return MBEDTLS_ERR_PKCS12_FEATURE_UNAVAILABLE; |
| } |
| |
| if ((status = psa_hash_setup(&op, alg)) != PSA_SUCCESS) { |
| goto exit; |
| } |
| |
| // Calculate hash( diversifier || salt_block || pwd_block ) |
| if ((status = psa_hash_update(&op, diversifier, v)) != PSA_SUCCESS) { |
| goto exit; |
| } |
| |
| if (use_salt != 0) { |
| if ((status = psa_hash_update(&op, salt_block, v)) != PSA_SUCCESS) { |
| goto exit; |
| } |
| } |
| |
| if (use_password != 0) { |
| if ((status = psa_hash_update(&op, pwd_block, v)) != PSA_SUCCESS) { |
| goto exit; |
| } |
| } |
| |
| if ((status = psa_hash_finish(&op, hash_output, out_size, &out_len)) |
| != PSA_SUCCESS) { |
| goto exit; |
| } |
| |
| // Perform remaining ( iterations - 1 ) recursive hash calculations |
| for (i = 1; i < (size_t) iterations; i++) { |
| if ((status = psa_hash_compute(alg, hash_output, hlen, hash_output, |
| out_size, &out_len)) != PSA_SUCCESS) { |
| goto exit; |
| } |
| } |
| |
| exit: |
| status_abort = psa_hash_abort(&op); |
| if (status == PSA_SUCCESS) { |
| status = status_abort; |
| } |
| return PSA_TO_MBEDTLS_ERR(status); |
| #endif /* !MBEDTLS_MD_C */ |
| } |
| |
| |
| int mbedtls_pkcs12_derivation(unsigned char *data, size_t datalen, |
| const unsigned char *pwd, size_t pwdlen, |
| const unsigned char *salt, size_t saltlen, |
| mbedtls_md_type_t md_type, int id, int iterations) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| unsigned int j; |
| |
| unsigned char diversifier[128]; |
| unsigned char salt_block[128], pwd_block[128], hash_block[128] = { 0 }; |
| unsigned char hash_output[MBEDTLS_HASH_MAX_SIZE]; |
| unsigned char *p; |
| unsigned char c; |
| int use_password = 0; |
| int use_salt = 0; |
| |
| size_t hlen, use_len, v, i; |
| |
| // This version only allows max of 64 bytes of password or salt |
| if (datalen > 128 || pwdlen > 64 || saltlen > 64) { |
| return MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA; |
| } |
| |
| if (pwd == NULL && pwdlen != 0) { |
| return MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA; |
| } |
| |
| if (salt == NULL && saltlen != 0) { |
| return MBEDTLS_ERR_PKCS12_BAD_INPUT_DATA; |
| } |
| |
| use_password = (pwd && pwdlen != 0); |
| use_salt = (salt && saltlen != 0); |
| |
| hlen = mbedtls_hash_info_get_size(md_type); |
| |
| if (hlen <= 32) { |
| v = 64; |
| } else { |
| v = 128; |
| } |
| |
| memset(diversifier, (unsigned char) id, v); |
| |
| if (use_salt != 0) { |
| pkcs12_fill_buffer(salt_block, v, salt, saltlen); |
| } |
| |
| if (use_password != 0) { |
| pkcs12_fill_buffer(pwd_block, v, pwd, pwdlen); |
| } |
| |
| p = data; |
| while (datalen > 0) { |
| if (calculate_hashes(md_type, iterations, diversifier, salt_block, |
| pwd_block, hash_output, use_salt, use_password, hlen, |
| v) != 0) { |
| goto exit; |
| } |
| |
| use_len = (datalen > hlen) ? hlen : datalen; |
| memcpy(p, hash_output, use_len); |
| datalen -= use_len; |
| p += use_len; |
| |
| if (datalen == 0) { |
| break; |
| } |
| |
| // Concatenating copies of hash_output into hash_block (B) |
| pkcs12_fill_buffer(hash_block, v, hash_output, hlen); |
| |
| // B += 1 |
| for (i = v; i > 0; i--) { |
| if (++hash_block[i - 1] != 0) { |
| break; |
| } |
| } |
| |
| if (use_salt != 0) { |
| // salt_block += B |
| c = 0; |
| for (i = v; i > 0; i--) { |
| j = salt_block[i - 1] + hash_block[i - 1] + c; |
| c = MBEDTLS_BYTE_1(j); |
| salt_block[i - 1] = MBEDTLS_BYTE_0(j); |
| } |
| } |
| |
| if (use_password != 0) { |
| // pwd_block += B |
| c = 0; |
| for (i = v; i > 0; i--) { |
| j = pwd_block[i - 1] + hash_block[i - 1] + c; |
| c = MBEDTLS_BYTE_1(j); |
| pwd_block[i - 1] = MBEDTLS_BYTE_0(j); |
| } |
| } |
| } |
| |
| ret = 0; |
| |
| exit: |
| mbedtls_platform_zeroize(salt_block, sizeof(salt_block)); |
| mbedtls_platform_zeroize(pwd_block, sizeof(pwd_block)); |
| mbedtls_platform_zeroize(hash_block, sizeof(hash_block)); |
| mbedtls_platform_zeroize(hash_output, sizeof(hash_output)); |
| |
| return ret; |
| } |
| |
| #endif /* MBEDTLS_PKCS12_C */ |