| /* |
| * Implementation of NIST SP 800-38F key wrapping, supporting KW and KWP modes |
| * only |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later |
| */ |
| /* |
| * Definition of Key Wrapping: |
| * https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38F.pdf |
| * RFC 3394 "Advanced Encryption Standard (AES) Key Wrap Algorithm" |
| * RFC 5649 "Advanced Encryption Standard (AES) Key Wrap with Padding Algorithm" |
| * |
| * Note: RFC 3394 defines different methodology for intermediate operations for |
| * the wrapping and unwrapping operation than the definition in NIST SP 800-38F. |
| */ |
| |
| #include "common.h" |
| |
| #if defined(MBEDTLS_NIST_KW_C) |
| |
| #include "mbedtls/nist_kw.h" |
| #include "mbedtls/platform_util.h" |
| #include "mbedtls/error.h" |
| #include "mbedtls/constant_time.h" |
| #include "constant_time_internal.h" |
| |
| #include <stdint.h> |
| #include <string.h> |
| |
| #include "mbedtls/platform.h" |
| |
| #if !defined(MBEDTLS_NIST_KW_ALT) |
| |
| #define KW_SEMIBLOCK_LENGTH 8 |
| #define MIN_SEMIBLOCKS_COUNT 3 |
| |
| /*! The 64-bit default integrity check value (ICV) for KW mode. */ |
| static const unsigned char NIST_KW_ICV1[] = { 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6 }; |
| /*! The 32-bit default integrity check value (ICV) for KWP mode. */ |
| static const unsigned char NIST_KW_ICV2[] = { 0xA6, 0x59, 0x59, 0xA6 }; |
| |
| /* |
| * Initialize context |
| */ |
| void mbedtls_nist_kw_init(mbedtls_nist_kw_context *ctx) |
| { |
| memset(ctx, 0, sizeof(mbedtls_nist_kw_context)); |
| } |
| |
| int mbedtls_nist_kw_setkey(mbedtls_nist_kw_context *ctx, |
| mbedtls_cipher_id_t cipher, |
| const unsigned char *key, |
| unsigned int keybits, |
| const int is_wrap) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| const mbedtls_cipher_info_t *cipher_info; |
| |
| cipher_info = mbedtls_cipher_info_from_values(cipher, |
| keybits, |
| MBEDTLS_MODE_ECB); |
| if (cipher_info == NULL) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| if (mbedtls_cipher_info_get_block_size(cipher_info) != 16) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| /* |
| * SP 800-38F currently defines AES cipher as the only block cipher allowed: |
| * "For KW and KWP, the underlying block cipher shall be approved, and the |
| * block size shall be 128 bits. Currently, the AES block cipher, with key |
| * lengths of 128, 192, or 256 bits, is the only block cipher that fits |
| * this profile." |
| * Currently we don't support other 128 bit block ciphers for key wrapping, |
| * such as Camellia and Aria. |
| */ |
| if (cipher != MBEDTLS_CIPHER_ID_AES) { |
| return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE; |
| } |
| |
| mbedtls_cipher_free(&ctx->cipher_ctx); |
| |
| if ((ret = mbedtls_cipher_setup(&ctx->cipher_ctx, cipher_info)) != 0) { |
| return ret; |
| } |
| |
| if ((ret = mbedtls_cipher_setkey(&ctx->cipher_ctx, key, keybits, |
| is_wrap ? MBEDTLS_ENCRYPT : |
| MBEDTLS_DECRYPT) |
| ) != 0) { |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Free context |
| */ |
| void mbedtls_nist_kw_free(mbedtls_nist_kw_context *ctx) |
| { |
| mbedtls_cipher_free(&ctx->cipher_ctx); |
| mbedtls_platform_zeroize(ctx, sizeof(mbedtls_nist_kw_context)); |
| } |
| |
| /* |
| * Helper function for Xoring the uint64_t "t" with the encrypted A. |
| * Defined in NIST SP 800-38F section 6.1 |
| */ |
| static void calc_a_xor_t(unsigned char A[KW_SEMIBLOCK_LENGTH], uint64_t t) |
| { |
| size_t i = 0; |
| for (i = 0; i < sizeof(t); i++) { |
| A[i] ^= (t >> ((sizeof(t) - 1 - i) * 8)) & 0xff; |
| } |
| } |
| |
| /* |
| * KW-AE as defined in SP 800-38F section 6.2 |
| * KWP-AE as defined in SP 800-38F section 6.3 |
| */ |
| int mbedtls_nist_kw_wrap(mbedtls_nist_kw_context *ctx, |
| mbedtls_nist_kw_mode_t mode, |
| const unsigned char *input, size_t in_len, |
| unsigned char *output, size_t *out_len, size_t out_size) |
| { |
| int ret = 0; |
| size_t semiblocks = 0; |
| size_t s; |
| size_t olen, padlen = 0; |
| uint64_t t = 0; |
| unsigned char outbuff[KW_SEMIBLOCK_LENGTH * 2]; |
| unsigned char inbuff[KW_SEMIBLOCK_LENGTH * 2]; |
| |
| *out_len = 0; |
| /* |
| * Generate the String to work on |
| */ |
| if (mode == MBEDTLS_KW_MODE_KW) { |
| if (out_size < in_len + KW_SEMIBLOCK_LENGTH) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| /* |
| * According to SP 800-38F Table 1, the plaintext length for KW |
| * must be between 2 to 2^54-1 semiblocks inclusive. |
| */ |
| if (in_len < 16 || |
| #if SIZE_MAX > 0x1FFFFFFFFFFFFF8 |
| in_len > 0x1FFFFFFFFFFFFF8 || |
| #endif |
| in_len % KW_SEMIBLOCK_LENGTH != 0) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| memcpy(output, NIST_KW_ICV1, KW_SEMIBLOCK_LENGTH); |
| memmove(output + KW_SEMIBLOCK_LENGTH, input, in_len); |
| } else { |
| if (in_len % 8 != 0) { |
| padlen = (8 - (in_len % 8)); |
| } |
| |
| if (out_size < in_len + KW_SEMIBLOCK_LENGTH + padlen) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| /* |
| * According to SP 800-38F Table 1, the plaintext length for KWP |
| * must be between 1 and 2^32-1 octets inclusive. |
| */ |
| if (in_len < 1 |
| #if SIZE_MAX > 0xFFFFFFFF |
| || in_len > 0xFFFFFFFF |
| #endif |
| ) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| memcpy(output, NIST_KW_ICV2, KW_SEMIBLOCK_LENGTH / 2); |
| MBEDTLS_PUT_UINT32_BE((in_len & 0xffffffff), output, |
| KW_SEMIBLOCK_LENGTH / 2); |
| |
| memcpy(output + KW_SEMIBLOCK_LENGTH, input, in_len); |
| memset(output + KW_SEMIBLOCK_LENGTH + in_len, 0, padlen); |
| } |
| semiblocks = ((in_len + padlen) / KW_SEMIBLOCK_LENGTH) + 1; |
| |
| s = 6 * (semiblocks - 1); |
| |
| if (mode == MBEDTLS_KW_MODE_KWP |
| && in_len <= KW_SEMIBLOCK_LENGTH) { |
| memcpy(inbuff, output, 16); |
| ret = mbedtls_cipher_update(&ctx->cipher_ctx, |
| inbuff, 16, output, &olen); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| } else { |
| unsigned char *R2 = output + KW_SEMIBLOCK_LENGTH; |
| unsigned char *A = output; |
| |
| /* |
| * Do the wrapping function W, as defined in RFC 3394 section 2.2.1 |
| */ |
| if (semiblocks < MIN_SEMIBLOCKS_COUNT) { |
| ret = MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| goto cleanup; |
| } |
| |
| /* Calculate intermediate values */ |
| for (t = 1; t <= s; t++) { |
| memcpy(inbuff, A, KW_SEMIBLOCK_LENGTH); |
| memcpy(inbuff + KW_SEMIBLOCK_LENGTH, R2, KW_SEMIBLOCK_LENGTH); |
| |
| ret = mbedtls_cipher_update(&ctx->cipher_ctx, |
| inbuff, 16, outbuff, &olen); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| |
| memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH); |
| calc_a_xor_t(A, t); |
| |
| memcpy(R2, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH); |
| R2 += KW_SEMIBLOCK_LENGTH; |
| if (R2 >= output + (semiblocks * KW_SEMIBLOCK_LENGTH)) { |
| R2 = output + KW_SEMIBLOCK_LENGTH; |
| } |
| } |
| } |
| |
| *out_len = semiblocks * KW_SEMIBLOCK_LENGTH; |
| |
| cleanup: |
| |
| if (ret != 0) { |
| memset(output, 0, semiblocks * KW_SEMIBLOCK_LENGTH); |
| } |
| mbedtls_platform_zeroize(inbuff, KW_SEMIBLOCK_LENGTH * 2); |
| mbedtls_platform_zeroize(outbuff, KW_SEMIBLOCK_LENGTH * 2); |
| |
| return ret; |
| } |
| |
| /* |
| * W-1 function as defined in RFC 3394 section 2.2.2 |
| * This function assumes the following: |
| * 1. Output buffer is at least of size ( semiblocks - 1 ) * KW_SEMIBLOCK_LENGTH. |
| * 2. The input buffer is of size semiblocks * KW_SEMIBLOCK_LENGTH. |
| * 3. Minimal number of semiblocks is 3. |
| * 4. A is a buffer to hold the first semiblock of the input buffer. |
| */ |
| static int unwrap(mbedtls_nist_kw_context *ctx, |
| const unsigned char *input, size_t semiblocks, |
| unsigned char A[KW_SEMIBLOCK_LENGTH], |
| unsigned char *output, size_t *out_len) |
| { |
| int ret = 0; |
| const size_t s = 6 * (semiblocks - 1); |
| size_t olen; |
| uint64_t t = 0; |
| unsigned char outbuff[KW_SEMIBLOCK_LENGTH * 2]; |
| unsigned char inbuff[KW_SEMIBLOCK_LENGTH * 2]; |
| unsigned char *R = NULL; |
| *out_len = 0; |
| |
| if (semiblocks < MIN_SEMIBLOCKS_COUNT) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| memcpy(A, input, KW_SEMIBLOCK_LENGTH); |
| memmove(output, input + KW_SEMIBLOCK_LENGTH, (semiblocks - 1) * KW_SEMIBLOCK_LENGTH); |
| R = output + (semiblocks - 2) * KW_SEMIBLOCK_LENGTH; |
| |
| /* Calculate intermediate values */ |
| for (t = s; t >= 1; t--) { |
| calc_a_xor_t(A, t); |
| |
| memcpy(inbuff, A, KW_SEMIBLOCK_LENGTH); |
| memcpy(inbuff + KW_SEMIBLOCK_LENGTH, R, KW_SEMIBLOCK_LENGTH); |
| |
| ret = mbedtls_cipher_update(&ctx->cipher_ctx, |
| inbuff, 16, outbuff, &olen); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| |
| memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH); |
| |
| /* Set R as LSB64 of outbuff */ |
| memcpy(R, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH); |
| |
| if (R == output) { |
| R = output + (semiblocks - 2) * KW_SEMIBLOCK_LENGTH; |
| } else { |
| R -= KW_SEMIBLOCK_LENGTH; |
| } |
| } |
| |
| *out_len = (semiblocks - 1) * KW_SEMIBLOCK_LENGTH; |
| |
| cleanup: |
| if (ret != 0) { |
| memset(output, 0, (semiblocks - 1) * KW_SEMIBLOCK_LENGTH); |
| } |
| mbedtls_platform_zeroize(inbuff, sizeof(inbuff)); |
| mbedtls_platform_zeroize(outbuff, sizeof(outbuff)); |
| |
| return ret; |
| } |
| |
| /* |
| * KW-AD as defined in SP 800-38F section 6.2 |
| * KWP-AD as defined in SP 800-38F section 6.3 |
| */ |
| int mbedtls_nist_kw_unwrap(mbedtls_nist_kw_context *ctx, |
| mbedtls_nist_kw_mode_t mode, |
| const unsigned char *input, size_t in_len, |
| unsigned char *output, size_t *out_len, size_t out_size) |
| { |
| int ret = 0; |
| size_t olen; |
| unsigned char A[KW_SEMIBLOCK_LENGTH]; |
| int diff; |
| |
| *out_len = 0; |
| if (out_size < in_len - KW_SEMIBLOCK_LENGTH) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| if (mode == MBEDTLS_KW_MODE_KW) { |
| /* |
| * According to SP 800-38F Table 1, the ciphertext length for KW |
| * must be between 3 to 2^54 semiblocks inclusive. |
| */ |
| if (in_len < 24 || |
| #if SIZE_MAX > 0x200000000000000 |
| in_len > 0x200000000000000 || |
| #endif |
| in_len % KW_SEMIBLOCK_LENGTH != 0) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| ret = unwrap(ctx, input, in_len / KW_SEMIBLOCK_LENGTH, |
| A, output, out_len); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| |
| /* Check ICV in "constant-time" */ |
| diff = mbedtls_ct_memcmp(NIST_KW_ICV1, A, KW_SEMIBLOCK_LENGTH); |
| |
| if (diff != 0) { |
| ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED; |
| goto cleanup; |
| } |
| |
| } else if (mode == MBEDTLS_KW_MODE_KWP) { |
| size_t padlen = 0; |
| uint32_t Plen; |
| /* |
| * According to SP 800-38F Table 1, the ciphertext length for KWP |
| * must be between 2 to 2^29 semiblocks inclusive. |
| */ |
| if (in_len < KW_SEMIBLOCK_LENGTH * 2 || |
| #if SIZE_MAX > 0x100000000 |
| in_len > 0x100000000 || |
| #endif |
| in_len % KW_SEMIBLOCK_LENGTH != 0) { |
| return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; |
| } |
| |
| if (in_len == KW_SEMIBLOCK_LENGTH * 2) { |
| unsigned char outbuff[KW_SEMIBLOCK_LENGTH * 2]; |
| ret = mbedtls_cipher_update(&ctx->cipher_ctx, |
| input, 16, outbuff, &olen); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| |
| memcpy(A, outbuff, KW_SEMIBLOCK_LENGTH); |
| memcpy(output, outbuff + KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH); |
| mbedtls_platform_zeroize(outbuff, sizeof(outbuff)); |
| *out_len = KW_SEMIBLOCK_LENGTH; |
| } else { |
| /* in_len >= KW_SEMIBLOCK_LENGTH * 3 */ |
| ret = unwrap(ctx, input, in_len / KW_SEMIBLOCK_LENGTH, |
| A, output, out_len); |
| if (ret != 0) { |
| goto cleanup; |
| } |
| } |
| |
| /* Check ICV in "constant-time" */ |
| diff = mbedtls_ct_memcmp(NIST_KW_ICV2, A, KW_SEMIBLOCK_LENGTH / 2); |
| |
| if (diff != 0) { |
| ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED; |
| } |
| |
| Plen = MBEDTLS_GET_UINT32_BE(A, KW_SEMIBLOCK_LENGTH / 2); |
| |
| /* |
| * Plen is the length of the plaintext, when the input is valid. |
| * If Plen is larger than the plaintext and padding, padlen will be |
| * larger than 8, because of the type wrap around. |
| */ |
| padlen = in_len - KW_SEMIBLOCK_LENGTH - Plen; |
| ret = mbedtls_ct_error_if(mbedtls_ct_uint_gt(padlen, 7), |
| MBEDTLS_ERR_CIPHER_AUTH_FAILED, ret); |
| padlen &= 7; |
| |
| /* Check padding in "constant-time" */ |
| const uint8_t zero[KW_SEMIBLOCK_LENGTH] = { 0 }; |
| diff = mbedtls_ct_memcmp_partial( |
| &output[*out_len - KW_SEMIBLOCK_LENGTH], zero, |
| KW_SEMIBLOCK_LENGTH, KW_SEMIBLOCK_LENGTH - padlen, 0); |
| |
| if (diff != 0) { |
| ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED; |
| } |
| |
| if (ret != 0) { |
| goto cleanup; |
| } |
| memset(output + Plen, 0, padlen); |
| *out_len = Plen; |
| } else { |
| ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE; |
| goto cleanup; |
| } |
| |
| cleanup: |
| if (ret != 0) { |
| memset(output, 0, *out_len); |
| *out_len = 0; |
| } |
| |
| mbedtls_platform_zeroize(&diff, sizeof(diff)); |
| mbedtls_platform_zeroize(A, sizeof(A)); |
| |
| return ret; |
| } |
| |
| #endif /* !MBEDTLS_NIST_KW_ALT */ |
| |
| #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C) |
| |
| /* |
| * Test vectors taken from NIST |
| * https://csrc.nist.gov/Projects/Cryptographic-Algorithm-Validation-Program/CAVP-TESTING-BLOCK-CIPHER-MODES#KW |
| */ |
| static const unsigned int key_len[] = { |
| 16, |
| #if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH) |
| 24, |
| 32 |
| #endif |
| }; |
| |
| static const unsigned char kw_key[][32] = { |
| { 0x75, 0x75, 0xda, 0x3a, 0x93, 0x60, 0x7c, 0xc2, |
| 0xbf, 0xd8, 0xce, 0xc7, 0xaa, 0xdf, 0xd9, 0xa6 }, |
| #if !defined(MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH) |
| { 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 */ |
