diff options
Diffstat (limited to 'library/nist_kw.c')
| -rw-r--r-- | library/nist_kw.c | 706 |
1 files changed, 706 insertions, 0 deletions
diff --git a/library/nist_kw.c b/library/nist_kw.c new file mode 100644 index 000000000..495c23d06 --- /dev/null +++ b/library/nist_kw.c @@ -0,0 +1,706 @@ +/* + * 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 + * + * 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. + */ +/* + * 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 <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( cipher_info->block_size != 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 i, olen; + unsigned char A[KW_SEMIBLOCK_LENGTH]; + unsigned char diff, bad_padding = 0; + + *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; + if ( padlen > 7 ) + { + padlen &= 7; + ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED; + } + + /* Check padding in "constant-time" */ + for( diff = 0, i = 0; i < KW_SEMIBLOCK_LENGTH; i++ ) + { + if( i >= KW_SEMIBLOCK_LENGTH - padlen ) + diff |= output[*out_len - KW_SEMIBLOCK_LENGTH + i]; + else + bad_padding |= output[*out_len - KW_SEMIBLOCK_LENGTH + i]; + } + + 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( &bad_padding, sizeof( bad_padding) ); + 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) + +#define KW_TESTS 3 + +/* + * 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[KW_TESTS] = { 16, 24, 32 }; + +static const unsigned char kw_key[KW_TESTS][32] = { + { 0x75, 0x75, 0xda, 0x3a, 0x93, 0x60, 0x7c, 0xc2, + 0xbf, 0xd8, 0xce, 0xc7, 0xaa, 0xdf, 0xd9, 0xa6 }, + { 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 } +}; + +static const unsigned char kw_msg[KW_TESTS][40] = { + { 0x42, 0x13, 0x6d, 0x3c, 0x38, 0x4a, 0x3e, 0xea, + 0xc9, 0x5a, 0x06, 0x6f, 0xd2, 0x8f, 0xed, 0x3f }, + { 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 } +}; + +static const size_t kw_msg_len[KW_TESTS] = { 16, 40, 24 }; +static const size_t kw_out_len[KW_TESTS] = { 24, 48, 32 }; +static const unsigned char kw_res[KW_TESTS][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 }, + { 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 } +}; + +static const unsigned char kwp_key[KW_TESTS][32] = { + { 0x78, 0x65, 0xe2, 0x0f, 0x3c, 0x21, 0x65, 0x9a, + 0xb4, 0x69, 0x0b, 0x62, 0x9c, 0xdf, 0x3c, 0xc4 }, + { 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 } +}; + +static const unsigned char kwp_msg[KW_TESTS][31] = { + { 0xbd, 0x68, 0x43, 0xd4, 0x20, 0x37, 0x8d, 0xc8, + 0x96 }, + { 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 } +}; +static const size_t kwp_msg_len[KW_TESTS] = { 9, 31, 1 }; + +static const unsigned char kwp_res[KW_TESTS][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 }, + { 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 } +}; +static const size_t kwp_out_len[KW_TESTS] = { 24, 40, 16 }; + +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 ); + + for( i = 0; i < KW_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" ); + } + + for( i = 0; i < KW_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 */ |