737 lines
23 KiB
C
737 lines
23 KiB
C
/*
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* Implementation of NIST SP 800-38F key wrapping, supporting KW and KWP modes
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* only
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Definition of Key Wrapping:
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* https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38F.pdf
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* RFC 3394 "Advanced Encryption Standard (AES) Key Wrap Algorithm"
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* RFC 5649 "Advanced Encryption Standard (AES) Key Wrap with Padding Algorithm"
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*
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* Note: RFC 3394 defines different methodology for intermediate operations for
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* the wrapping and unwrapping operation than the definition in NIST SP 800-38F.
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*/
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#include "common.h"
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#if defined(MBEDTLS_NIST_KW_C)
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#include "mbedtls/nist_kw.h"
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#include "mbedtls/platform_util.h"
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#include "mbedtls/error.h"
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#include "mbedtls/constant_time.h"
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#include "constant_time_internal.h"
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#include <stdint.h>
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#include <string.h>
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#include "mbedtls/platform.h"
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#if !defined(MBEDTLS_NIST_KW_ALT)
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#define KW_SEMIBLOCK_LENGTH 8
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#define MIN_SEMIBLOCKS_COUNT 3
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/*! The 64-bit default integrity check value (ICV) for KW mode. */
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static const unsigned char NIST_KW_ICV1[] = { 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6 };
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/*! The 32-bit default integrity check value (ICV) for KWP mode. */
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static const unsigned char NIST_KW_ICV2[] = { 0xA6, 0x59, 0x59, 0xA6 };
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/*
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* Initialize context
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*/
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void mbedtls_nist_kw_init(mbedtls_nist_kw_context *ctx)
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{
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memset(ctx, 0, sizeof(mbedtls_nist_kw_context));
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}
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int mbedtls_nist_kw_setkey(mbedtls_nist_kw_context *ctx,
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mbedtls_cipher_id_t cipher,
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const unsigned char *key,
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unsigned int keybits,
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const int is_wrap)
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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const mbedtls_cipher_info_t *cipher_info;
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cipher_info = mbedtls_cipher_info_from_values(cipher,
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keybits,
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MBEDTLS_MODE_ECB);
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if (cipher_info == NULL) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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if (mbedtls_cipher_info_get_block_size(cipher_info) != 16) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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/*
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* SP 800-38F currently defines AES cipher as the only block cipher allowed:
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* "For KW and KWP, the underlying block cipher shall be approved, and the
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* block size shall be 128 bits. Currently, the AES block cipher, with key
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* lengths of 128, 192, or 256 bits, is the only block cipher that fits
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* this profile."
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* Currently we don't support other 128 bit block ciphers for key wrapping,
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* such as Camellia and Aria.
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*/
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if (cipher != MBEDTLS_CIPHER_ID_AES) {
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return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
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}
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mbedtls_cipher_free(&ctx->cipher_ctx);
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if ((ret = mbedtls_cipher_setup(&ctx->cipher_ctx, cipher_info)) != 0) {
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return ret;
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}
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if ((ret = mbedtls_cipher_setkey(&ctx->cipher_ctx, key, keybits,
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is_wrap ? MBEDTLS_ENCRYPT :
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MBEDTLS_DECRYPT)
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) != 0) {
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return ret;
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}
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return 0;
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}
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/*
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* Free context
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*/
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void mbedtls_nist_kw_free(mbedtls_nist_kw_context *ctx)
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{
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mbedtls_cipher_free(&ctx->cipher_ctx);
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mbedtls_platform_zeroize(ctx, sizeof(mbedtls_nist_kw_context));
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}
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/*
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* Helper function for Xoring the uint64_t "t" with the encrypted A.
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* Defined in NIST SP 800-38F section 6.1
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*/
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static void calc_a_xor_t(unsigned char A[KW_SEMIBLOCK_LENGTH], uint64_t t)
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{
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size_t i = 0;
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for (i = 0; i < sizeof(t); i++) {
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A[i] ^= (t >> ((sizeof(t) - 1 - i) * 8)) & 0xff;
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}
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}
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/*
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* KW-AE as defined in SP 800-38F section 6.2
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* KWP-AE as defined in SP 800-38F section 6.3
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*/
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int mbedtls_nist_kw_wrap(mbedtls_nist_kw_context *ctx,
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mbedtls_nist_kw_mode_t mode,
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const unsigned char *input, size_t in_len,
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unsigned char *output, size_t *out_len, size_t out_size)
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{
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int ret = 0;
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size_t semiblocks = 0;
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size_t s;
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size_t olen, padlen = 0;
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uint64_t t = 0;
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unsigned char outbuff[KW_SEMIBLOCK_LENGTH * 2];
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unsigned char inbuff[KW_SEMIBLOCK_LENGTH * 2];
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*out_len = 0;
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/*
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* Generate the String to work on
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*/
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if (mode == MBEDTLS_KW_MODE_KW) {
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if (out_size < in_len + KW_SEMIBLOCK_LENGTH) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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/*
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* According to SP 800-38F Table 1, the plaintext length for KW
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* must be between 2 to 2^54-1 semiblocks inclusive.
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*/
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if (in_len < 16 ||
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#if SIZE_MAX > 0x1FFFFFFFFFFFFF8
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in_len > 0x1FFFFFFFFFFFFF8 ||
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#endif
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in_len % KW_SEMIBLOCK_LENGTH != 0) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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memcpy(output, NIST_KW_ICV1, KW_SEMIBLOCK_LENGTH);
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memmove(output + KW_SEMIBLOCK_LENGTH, input, in_len);
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} else {
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if (in_len % 8 != 0) {
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padlen = (8 - (in_len % 8));
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}
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if (out_size < in_len + KW_SEMIBLOCK_LENGTH + padlen) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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/*
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* According to SP 800-38F Table 1, the plaintext length for KWP
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* must be between 1 and 2^32-1 octets inclusive.
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*/
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if (in_len < 1
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#if SIZE_MAX > 0xFFFFFFFF
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|| in_len > 0xFFFFFFFF
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#endif
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) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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memcpy(output, NIST_KW_ICV2, KW_SEMIBLOCK_LENGTH / 2);
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MBEDTLS_PUT_UINT32_BE((in_len & 0xffffffff), output,
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KW_SEMIBLOCK_LENGTH / 2);
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memcpy(output + KW_SEMIBLOCK_LENGTH, input, in_len);
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memset(output + KW_SEMIBLOCK_LENGTH + in_len, 0, padlen);
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}
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semiblocks = ((in_len + padlen) / KW_SEMIBLOCK_LENGTH) + 1;
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s = 6 * (semiblocks - 1);
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if (mode == MBEDTLS_KW_MODE_KWP
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&& in_len <= KW_SEMIBLOCK_LENGTH) {
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memcpy(inbuff, output, 16);
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ret = mbedtls_cipher_update(&ctx->cipher_ctx,
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inbuff, 16, output, &olen);
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if (ret != 0) {
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goto cleanup;
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}
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} else {
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unsigned char *R2 = output + KW_SEMIBLOCK_LENGTH;
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unsigned char *A = output;
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/*
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* Do the wrapping function W, as defined in RFC 3394 section 2.2.1
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*/
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if (semiblocks < MIN_SEMIBLOCKS_COUNT) {
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ret = MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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goto cleanup;
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}
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/* Calculate intermediate values */
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for (t = 1; t <= s; t++) {
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memcpy(inbuff, A, KW_SEMIBLOCK_LENGTH);
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memcpy(inbuff + KW_SEMIBLOCK_LENGTH, R2, KW_SEMIBLOCK_LENGTH);
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ret = mbedtls_cipher_update(&ctx->cipher_ctx,
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inbuff, 16, outbuff, &olen);
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if (ret != 0) {
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goto cleanup;
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}
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memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH);
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calc_a_xor_t(A, t);
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memcpy(R2, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH);
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R2 += KW_SEMIBLOCK_LENGTH;
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if (R2 >= output + (semiblocks * KW_SEMIBLOCK_LENGTH)) {
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R2 = output + KW_SEMIBLOCK_LENGTH;
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}
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}
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}
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*out_len = semiblocks * KW_SEMIBLOCK_LENGTH;
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cleanup:
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if (ret != 0) {
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memset(output, 0, semiblocks * KW_SEMIBLOCK_LENGTH);
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}
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mbedtls_platform_zeroize(inbuff, KW_SEMIBLOCK_LENGTH * 2);
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mbedtls_platform_zeroize(outbuff, KW_SEMIBLOCK_LENGTH * 2);
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return ret;
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}
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/*
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* W-1 function as defined in RFC 3394 section 2.2.2
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* This function assumes the following:
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* 1. Output buffer is at least of size ( semiblocks - 1 ) * KW_SEMIBLOCK_LENGTH.
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* 2. The input buffer is of size semiblocks * KW_SEMIBLOCK_LENGTH.
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* 3. Minimal number of semiblocks is 3.
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* 4. A is a buffer to hold the first semiblock of the input buffer.
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*/
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static int unwrap(mbedtls_nist_kw_context *ctx,
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const unsigned char *input, size_t semiblocks,
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unsigned char A[KW_SEMIBLOCK_LENGTH],
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unsigned char *output, size_t *out_len)
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{
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int ret = 0;
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const size_t s = 6 * (semiblocks - 1);
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size_t olen;
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uint64_t t = 0;
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unsigned char outbuff[KW_SEMIBLOCK_LENGTH * 2];
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unsigned char inbuff[KW_SEMIBLOCK_LENGTH * 2];
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unsigned char *R = NULL;
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*out_len = 0;
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if (semiblocks < MIN_SEMIBLOCKS_COUNT) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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memcpy(A, input, KW_SEMIBLOCK_LENGTH);
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memmove(output, input + KW_SEMIBLOCK_LENGTH, (semiblocks - 1) * KW_SEMIBLOCK_LENGTH);
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R = output + (semiblocks - 2) * KW_SEMIBLOCK_LENGTH;
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/* Calculate intermediate values */
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for (t = s; t >= 1; t--) {
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calc_a_xor_t(A, t);
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memcpy(inbuff, A, KW_SEMIBLOCK_LENGTH);
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memcpy(inbuff + KW_SEMIBLOCK_LENGTH, R, KW_SEMIBLOCK_LENGTH);
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ret = mbedtls_cipher_update(&ctx->cipher_ctx,
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inbuff, 16, outbuff, &olen);
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if (ret != 0) {
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goto cleanup;
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}
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memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH);
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/* Set R as LSB64 of outbuff */
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memcpy(R, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH);
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if (R == output) {
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R = output + (semiblocks - 2) * KW_SEMIBLOCK_LENGTH;
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} else {
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R -= KW_SEMIBLOCK_LENGTH;
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}
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}
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*out_len = (semiblocks - 1) * KW_SEMIBLOCK_LENGTH;
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cleanup:
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if (ret != 0) {
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memset(output, 0, (semiblocks - 1) * KW_SEMIBLOCK_LENGTH);
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}
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mbedtls_platform_zeroize(inbuff, sizeof(inbuff));
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mbedtls_platform_zeroize(outbuff, sizeof(outbuff));
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return ret;
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}
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/*
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* KW-AD as defined in SP 800-38F section 6.2
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* KWP-AD as defined in SP 800-38F section 6.3
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*/
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int mbedtls_nist_kw_unwrap(mbedtls_nist_kw_context *ctx,
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mbedtls_nist_kw_mode_t mode,
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const unsigned char *input, size_t in_len,
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unsigned char *output, size_t *out_len, size_t out_size)
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{
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int ret = 0;
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size_t olen;
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unsigned char A[KW_SEMIBLOCK_LENGTH];
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int diff;
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*out_len = 0;
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if (out_size < in_len - KW_SEMIBLOCK_LENGTH) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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if (mode == MBEDTLS_KW_MODE_KW) {
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/*
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* According to SP 800-38F Table 1, the ciphertext length for KW
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* must be between 3 to 2^54 semiblocks inclusive.
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*/
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if (in_len < 24 ||
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#if SIZE_MAX > 0x200000000000000
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in_len > 0x200000000000000 ||
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#endif
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in_len % KW_SEMIBLOCK_LENGTH != 0) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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ret = unwrap(ctx, input, in_len / KW_SEMIBLOCK_LENGTH,
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A, output, out_len);
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if (ret != 0) {
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goto cleanup;
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}
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/* Check ICV in "constant-time" */
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diff = mbedtls_ct_memcmp(NIST_KW_ICV1, A, KW_SEMIBLOCK_LENGTH);
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if (diff != 0) {
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ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
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goto cleanup;
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}
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} else if (mode == MBEDTLS_KW_MODE_KWP) {
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size_t padlen = 0;
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uint32_t Plen;
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/*
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* According to SP 800-38F Table 1, the ciphertext length for KWP
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* must be between 2 to 2^29 semiblocks inclusive.
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*/
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if (in_len < KW_SEMIBLOCK_LENGTH * 2 ||
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#if SIZE_MAX > 0x100000000
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in_len > 0x100000000 ||
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#endif
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in_len % KW_SEMIBLOCK_LENGTH != 0) {
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return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
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}
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if (in_len == KW_SEMIBLOCK_LENGTH * 2) {
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unsigned char outbuff[KW_SEMIBLOCK_LENGTH * 2];
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ret = mbedtls_cipher_update(&ctx->cipher_ctx,
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input, 16, outbuff, &olen);
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if (ret != 0) {
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goto cleanup;
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}
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memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH);
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memcpy(output, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH);
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mbedtls_platform_zeroize(outbuff, sizeof(outbuff));
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*out_len = KW_SEMIBLOCK_LENGTH;
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} else {
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/* in_len >= KW_SEMIBLOCK_LENGTH * 3 */
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ret = unwrap(ctx, input, in_len / KW_SEMIBLOCK_LENGTH,
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A, output, out_len);
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if (ret != 0) {
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goto cleanup;
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}
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}
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/* Check ICV in "constant-time" */
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diff = mbedtls_ct_memcmp(NIST_KW_ICV2, A, KW_SEMIBLOCK_LENGTH / 2);
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if (diff != 0) {
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ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
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}
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Plen = MBEDTLS_GET_UINT32_BE(A, KW_SEMIBLOCK_LENGTH / 2);
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/*
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* Plen is the length of the plaintext, when the input is valid.
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* If Plen is larger than the plaintext and padding, padlen will be
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* larger than 8, because of the type wrap around.
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*/
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padlen = in_len - KW_SEMIBLOCK_LENGTH - Plen;
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ret = mbedtls_ct_error_if(mbedtls_ct_uint_gt(padlen, 7),
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MBEDTLS_ERR_CIPHER_AUTH_FAILED, ret);
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padlen &= 7;
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/* Check padding in "constant-time" */
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const uint8_t zero[KW_SEMIBLOCK_LENGTH] = { 0 };
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diff = mbedtls_ct_memcmp_partial(
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&output[*out_len - KW_SEMIBLOCK_LENGTH], zero,
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KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH - padlen, 0);
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if (diff != 0) {
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ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
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}
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if (ret != 0) {
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goto cleanup;
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}
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memset(output + Plen, 0, padlen);
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*out_len = Plen;
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} else {
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ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
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goto cleanup;
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}
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cleanup:
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if (ret != 0) {
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memset(output, 0, *out_len);
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*out_len = 0;
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}
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mbedtls_platform_zeroize(&diff, sizeof(diff));
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mbedtls_platform_zeroize(A, sizeof(A));
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return ret;
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}
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#endif /* !MBEDTLS_NIST_KW_ALT */
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#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
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/*
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* Test vectors taken from NIST
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* https://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/CAVP-TESTING-BLOCK-CIPHER-MODES#KW
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*/
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static const unsigned int key_len[] = {
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16,
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#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
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24,
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32
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#endif
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};
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static const unsigned char kw_key[][32] = {
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{ 0x75, 0x75, 0xda, 0x3a, 0x93, 0x60, 0x7c, 0xc2,
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0xbf, 0xd8, 0xce, 0xc7, 0xaa, 0xdf, 0xd9, 0xa6 },
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#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
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{ 0x2d, 0x85, 0x26, 0x08, 0x1d, 0x02, 0xfb, 0x5b,
|
|
0x85, 0xf6, 0x9a, 0xc2, 0x86, 0xec, 0xd5, 0x7d,
|
|
0x40, 0xdf, 0x5d, 0xf3, 0x49, 0x47, 0x44, 0xd3 },
|
|
{ 0x11, 0x2a, 0xd4, 0x1b, 0x48, 0x56, 0xc7, 0x25,
|
|
0x4a, 0x98, 0x48, 0xd3, 0x0f, 0xdd, 0x78, 0x33,
|
|
0x5b, 0x03, 0x9a, 0x48, 0xa8, 0x96, 0x2c, 0x4d,
|
|
0x1c, 0xb7, 0x8e, 0xab, 0xd5, 0xda, 0xd7, 0x88 }
|
|
#endif
|
|
};
|
|
|
|
static const unsigned char kw_msg[][40] = {
|
|
{ 0x42, 0x13, 0x6d, 0x3c, 0x38, 0x4a, 0x3e, 0xea,
|
|
0xc9, 0x5a, 0x06, 0x6f, 0xd2, 0x8f, 0xed, 0x3f },
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
{ 0x95, 0xc1, 0x1b, 0xf5, 0x35, 0x3a, 0xfe, 0xdb,
|
|
0x98, 0xfd, 0xd6, 0xc8, 0xca, 0x6f, 0xdb, 0x6d,
|
|
0xa5, 0x4b, 0x74, 0xb4, 0x99, 0x0f, 0xdc, 0x45,
|
|
0xc0, 0x9d, 0x15, 0x8f, 0x51, 0xce, 0x62, 0x9d,
|
|
0xe2, 0xaf, 0x26, 0xe3, 0x25, 0x0e, 0x6b, 0x4c },
|
|
{ 0x1b, 0x20, 0xbf, 0x19, 0x90, 0xb0, 0x65, 0xd7,
|
|
0x98, 0xe1, 0xb3, 0x22, 0x64, 0xad, 0x50, 0xa8,
|
|
0x74, 0x74, 0x92, 0xba, 0x09, 0xa0, 0x4d, 0xd1 }
|
|
#endif
|
|
};
|
|
|
|
static const size_t kw_msg_len[] = {
|
|
16,
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
40,
|
|
24
|
|
#endif
|
|
};
|
|
static const size_t kw_out_len[] = {
|
|
24,
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
48,
|
|
32
|
|
#endif
|
|
};
|
|
static const unsigned char kw_res[][48] = {
|
|
{ 0x03, 0x1f, 0x6b, 0xd7, 0xe6, 0x1e, 0x64, 0x3d,
|
|
0xf6, 0x85, 0x94, 0x81, 0x6f, 0x64, 0xca, 0xa3,
|
|
0xf5, 0x6f, 0xab, 0xea, 0x25, 0x48, 0xf5, 0xfb },
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
{ 0x44, 0x3c, 0x6f, 0x15, 0x09, 0x83, 0x71, 0x91,
|
|
0x3e, 0x5c, 0x81, 0x4c, 0xa1, 0xa0, 0x42, 0xec,
|
|
0x68, 0x2f, 0x7b, 0x13, 0x6d, 0x24, 0x3a, 0x4d,
|
|
0x6c, 0x42, 0x6f, 0xc6, 0x97, 0x15, 0x63, 0xe8,
|
|
0xa1, 0x4a, 0x55, 0x8e, 0x09, 0x64, 0x16, 0x19,
|
|
0xbf, 0x03, 0xfc, 0xaf, 0x90, 0xb1, 0xfc, 0x2d },
|
|
{ 0xba, 0x8a, 0x25, 0x9a, 0x47, 0x1b, 0x78, 0x7d,
|
|
0xd5, 0xd5, 0x40, 0xec, 0x25, 0xd4, 0x3d, 0x87,
|
|
0x20, 0x0f, 0xda, 0xdc, 0x6d, 0x1f, 0x05, 0xd9,
|
|
0x16, 0x58, 0x4f, 0xa9, 0xf6, 0xcb, 0xf5, 0x12 }
|
|
#endif
|
|
};
|
|
|
|
static const unsigned char kwp_key[][32] = {
|
|
{ 0x78, 0x65, 0xe2, 0x0f, 0x3c, 0x21, 0x65, 0x9a,
|
|
0xb4, 0x69, 0x0b, 0x62, 0x9c, 0xdf, 0x3c, 0xc4 },
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
{ 0xf5, 0xf8, 0x96, 0xa3, 0xbd, 0x2f, 0x4a, 0x98,
|
|
0x23, 0xef, 0x16, 0x2b, 0x00, 0xb8, 0x05, 0xd7,
|
|
0xde, 0x1e, 0xa4, 0x66, 0x26, 0x96, 0xa2, 0x58 },
|
|
{ 0x95, 0xda, 0x27, 0x00, 0xca, 0x6f, 0xd9, 0xa5,
|
|
0x25, 0x54, 0xee, 0x2a, 0x8d, 0xf1, 0x38, 0x6f,
|
|
0x5b, 0x94, 0xa1, 0xa6, 0x0e, 0xd8, 0xa4, 0xae,
|
|
0xf6, 0x0a, 0x8d, 0x61, 0xab, 0x5f, 0x22, 0x5a }
|
|
#endif
|
|
};
|
|
|
|
static const unsigned char kwp_msg[][31] = {
|
|
{ 0xbd, 0x68, 0x43, 0xd4, 0x20, 0x37, 0x8d, 0xc8,
|
|
0x96 },
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
{ 0x6c, 0xcd, 0xd5, 0x85, 0x18, 0x40, 0x97, 0xeb,
|
|
0xd5, 0xc3, 0xaf, 0x3e, 0x47, 0xd0, 0x2c, 0x19,
|
|
0x14, 0x7b, 0x4d, 0x99, 0x5f, 0x96, 0x43, 0x66,
|
|
0x91, 0x56, 0x75, 0x8c, 0x13, 0x16, 0x8f },
|
|
{ 0xd1 }
|
|
#endif
|
|
};
|
|
static const size_t kwp_msg_len[] = {
|
|
9,
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
31,
|
|
1
|
|
#endif
|
|
};
|
|
|
|
static const unsigned char kwp_res[][48] = {
|
|
{ 0x41, 0xec, 0xa9, 0x56, 0xd4, 0xaa, 0x04, 0x7e,
|
|
0xb5, 0xcf, 0x4e, 0xfe, 0x65, 0x96, 0x61, 0xe7,
|
|
0x4d, 0xb6, 0xf8, 0xc5, 0x64, 0xe2, 0x35, 0x00 },
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
{ 0x4e, 0x9b, 0xc2, 0xbc, 0xbc, 0x6c, 0x1e, 0x13,
|
|
0xd3, 0x35, 0xbc, 0xc0, 0xf7, 0x73, 0x6a, 0x88,
|
|
0xfa, 0x87, 0x53, 0x66, 0x15, 0xbb, 0x8e, 0x63,
|
|
0x8b, 0xcc, 0x81, 0x66, 0x84, 0x68, 0x17, 0x90,
|
|
0x67, 0xcf, 0xa9, 0x8a, 0x9d, 0x0e, 0x33, 0x26 },
|
|
{ 0x06, 0xba, 0x7a, 0xe6, 0xf3, 0x24, 0x8c, 0xfd,
|
|
0xcf, 0x26, 0x75, 0x07, 0xfa, 0x00, 0x1b, 0xc4 }
|
|
#endif
|
|
};
|
|
static const size_t kwp_out_len[] = {
|
|
24,
|
|
#if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH)
|
|
40,
|
|
16
|
|
#endif
|
|
};
|
|
|
|
int mbedtls_nist_kw_self_test(int verbose)
|
|
{
|
|
mbedtls_nist_kw_context ctx;
|
|
unsigned char out[48];
|
|
size_t olen;
|
|
int i;
|
|
int ret = 0;
|
|
mbedtls_nist_kw_init(&ctx);
|
|
|
|
/*
|
|
* KW mode
|
|
*/
|
|
{
|
|
static const int num_tests = sizeof(kw_key) / sizeof(*kw_key);
|
|
|
|
for (i = 0; i < num_tests; i++) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" KW-AES-%u ", (unsigned int) key_len[i] * 8);
|
|
}
|
|
|
|
ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES,
|
|
kw_key[i], key_len[i] * 8, 1);
|
|
if (ret != 0) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" KW: setup failed ");
|
|
}
|
|
|
|
goto end;
|
|
}
|
|
|
|
ret = mbedtls_nist_kw_wrap(&ctx, MBEDTLS_KW_MODE_KW, kw_msg[i],
|
|
kw_msg_len[i], out, &olen, sizeof(out));
|
|
if (ret != 0 || kw_out_len[i] != olen ||
|
|
memcmp(out, kw_res[i], kw_out_len[i]) != 0) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf("failed. ");
|
|
}
|
|
|
|
ret = 1;
|
|
goto end;
|
|
}
|
|
|
|
if ((ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES,
|
|
kw_key[i], key_len[i] * 8, 0))
|
|
!= 0) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" KW: setup failed ");
|
|
}
|
|
|
|
goto end;
|
|
}
|
|
|
|
ret = mbedtls_nist_kw_unwrap(&ctx, MBEDTLS_KW_MODE_KW,
|
|
out, olen, out, &olen, sizeof(out));
|
|
|
|
if (ret != 0 || olen != kw_msg_len[i] ||
|
|
memcmp(out, kw_msg[i], kw_msg_len[i]) != 0) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf("failed\n");
|
|
}
|
|
|
|
ret = 1;
|
|
goto end;
|
|
}
|
|
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" passed\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* KWP mode
|
|
*/
|
|
{
|
|
static const int num_tests = sizeof(kwp_key) / sizeof(*kwp_key);
|
|
|
|
for (i = 0; i < num_tests; i++) {
|
|
olen = sizeof(out);
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" KWP-AES-%u ", (unsigned int) key_len[i] * 8);
|
|
}
|
|
|
|
ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES, kwp_key[i],
|
|
key_len[i] * 8, 1);
|
|
if (ret != 0) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" KWP: setup failed ");
|
|
}
|
|
|
|
goto end;
|
|
}
|
|
ret = mbedtls_nist_kw_wrap(&ctx, MBEDTLS_KW_MODE_KWP, kwp_msg[i],
|
|
kwp_msg_len[i], out, &olen, sizeof(out));
|
|
|
|
if (ret != 0 || kwp_out_len[i] != olen ||
|
|
memcmp(out, kwp_res[i], kwp_out_len[i]) != 0) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf("failed. ");
|
|
}
|
|
|
|
ret = 1;
|
|
goto end;
|
|
}
|
|
|
|
if ((ret = mbedtls_nist_kw_setkey(&ctx, MBEDTLS_CIPHER_ID_AES,
|
|
kwp_key[i], key_len[i] * 8, 0))
|
|
!= 0) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" KWP: setup failed ");
|
|
}
|
|
|
|
goto end;
|
|
}
|
|
|
|
ret = mbedtls_nist_kw_unwrap(&ctx, MBEDTLS_KW_MODE_KWP, out,
|
|
olen, out, &olen, sizeof(out));
|
|
|
|
if (ret != 0 || olen != kwp_msg_len[i] ||
|
|
memcmp(out, kwp_msg[i], kwp_msg_len[i]) != 0) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf("failed. ");
|
|
}
|
|
|
|
ret = 1;
|
|
goto end;
|
|
}
|
|
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" passed\n");
|
|
}
|
|
}
|
|
}
|
|
end:
|
|
mbedtls_nist_kw_free(&ctx);
|
|
|
|
if (verbose != 0) {
|
|
mbedtls_printf("\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
|
|
|
|
#endif /* MBEDTLS_NIST_KW_C */
|