/* | |
* Implementation of NIST SP 800-38F key wrapping, supporting KW and KWP modes | |
* only | |
* | |
* Copyright (C) 2018, Arm Limited (or its affiliates), All Rights Reserved | |
* 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. | |
* | |
* This file is part of Mbed TLS (https://tls.mbed.org) | |
*/ | |
/* | |
* 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. | |
*/ | |
#if !defined(MBEDTLS_CONFIG_FILE) | |
#include "mbedtls/config.h" | |
#else | |
#include MBEDTLS_CONFIG_FILE | |
#endif | |
#if defined(MBEDTLS_NIST_KW_C) | |
#include "mbedtls/nist_kw.h" | |
#include "mbedtls/platform_util.h" | |
#include <stdint.h> | |
#include <string.h> | |
#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C) | |
#if defined(MBEDTLS_PLATFORM_C) | |
#include "mbedtls/platform.h" | |
#else | |
#include <stdio.h> | |
#define mbedtls_printf printf | |
#endif /* MBEDTLS_PLATFORM_C */ | |
#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */ | |
#if !defined(MBEDTLS_NIST_KW_ALT) | |
#define KW_SEMIBLOCK_LENGTH 8 | |
#define MIN_SEMIBLOCKS_COUNT 3 | |
/* constant-time buffer comparison */ | |
static inline unsigned char mbedtls_nist_kw_safer_memcmp( const void *a, const void *b, size_t n ) | |
{ | |
size_t i; | |
volatile const unsigned char *A = (volatile const unsigned char *) a; | |
volatile const unsigned char *B = (volatile const unsigned char *) b; | |
volatile unsigned char diff = 0; | |
for( i = 0; i < n; i++ ) | |
{ | |
/* Read volatile data in order before computing diff. | |
* This avoids IAR compiler warning: | |
* 'the order of volatile accesses is undefined ..' */ | |
unsigned char x = A[i], y = B[i]; | |
diff |= x ^ y; | |
} | |
return( diff ); | |
} | |
/*! 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}; | |
#ifndef GET_UINT32_BE | |
#define GET_UINT32_BE(n,b,i) \ | |
do { \ | |
(n) = ( (uint32_t) (b)[(i) ] << 24 ) \ | |
| ( (uint32_t) (b)[(i) + 1] << 16 ) \ | |
| ( (uint32_t) (b)[(i) + 2] << 8 ) \ | |
| ( (uint32_t) (b)[(i) + 3] ); \ | |
} while( 0 ) | |
#endif | |
#ifndef PUT_UINT32_BE | |
#define PUT_UINT32_BE(n,b,i) \ | |
do { \ | |
(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \ | |
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \ | |
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \ | |
(b)[(i) + 3] = (unsigned char) ( (n) ); \ | |
} while( 0 ) | |
#endif | |
/* | |
* 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; | |
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]; | |
unsigned char *R2 = output + KW_SEMIBLOCK_LENGTH; | |
unsigned char *A = output; | |
*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 ); | |
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 | |
{ | |
/* | |
* 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 = output + ( semiblocks - 2 ) * KW_SEMIBLOCK_LENGTH; | |
*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 ); | |
/* 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_nist_kw_safer_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_nist_kw_safer_memcmp( NIST_KW_ICV2, A, KW_SEMIBLOCK_LENGTH / 2 ); | |
if( diff != 0 ) | |
{ | |
ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED; | |
} | |
GET_UINT32_BE( Plen, 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 */ |