diff options
Diffstat (limited to 'thirdparty/mbedtls/library/ctr_drbg.c')
| -rw-r--r-- | thirdparty/mbedtls/library/ctr_drbg.c | 444 |
1 files changed, 293 insertions, 151 deletions
diff --git a/thirdparty/mbedtls/library/ctr_drbg.c b/thirdparty/mbedtls/library/ctr_drbg.c index 90264e844a..a604ec0761 100644 --- a/thirdparty/mbedtls/library/ctr_drbg.c +++ b/thirdparty/mbedtls/library/ctr_drbg.c @@ -2,13 +2,7 @@ * CTR_DRBG implementation based on AES-256 (NIST SP 800-90) * * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later - * - * This file is provided under the Apache License 2.0, or the - * GNU General Public License v2.0 or later. - * - * ********** - * Apache License 2.0: + * 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. @@ -21,27 +15,6 @@ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. - * - * ********** - * - * ********** - * GNU General Public License v2.0 or later: - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - * ********** */ /* * The NIST SP 800-90 DRBGs are described in the following publication. @@ -49,16 +22,13 @@ * http://csrc.nist.gov/publications/nistpubs/800-90/SP800-90revised_March2007.pdf */ -#if !defined(MBEDTLS_CONFIG_FILE) -#include "mbedtls/config.h" -#else -#include MBEDTLS_CONFIG_FILE -#endif +#include "common.h" #if defined(MBEDTLS_CTR_DRBG_C) #include "mbedtls/ctr_drbg.h" #include "mbedtls/platform_util.h" +#include "mbedtls/error.h" #include <string.h> @@ -81,6 +51,9 @@ void mbedtls_ctr_drbg_init( mbedtls_ctr_drbg_context *ctx ) { memset( ctx, 0, sizeof( mbedtls_ctr_drbg_context ) ); + /* Indicate that the entropy nonce length is not set explicitly. + * See mbedtls_ctr_drbg_set_nonce_len(). */ + ctx->reseed_counter = -1; ctx->reseed_interval = MBEDTLS_CTR_DRBG_RESEED_INTERVAL; } @@ -102,19 +75,49 @@ void mbedtls_ctr_drbg_free( mbedtls_ctr_drbg_context *ctx ) mbedtls_aes_free( &ctx->aes_ctx ); mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ctr_drbg_context ) ); ctx->reseed_interval = MBEDTLS_CTR_DRBG_RESEED_INTERVAL; + ctx->reseed_counter = -1; } -void mbedtls_ctr_drbg_set_prediction_resistance( mbedtls_ctr_drbg_context *ctx, int resistance ) +void mbedtls_ctr_drbg_set_prediction_resistance( mbedtls_ctr_drbg_context *ctx, + int resistance ) { ctx->prediction_resistance = resistance; } -void mbedtls_ctr_drbg_set_entropy_len( mbedtls_ctr_drbg_context *ctx, size_t len ) +void mbedtls_ctr_drbg_set_entropy_len( mbedtls_ctr_drbg_context *ctx, + size_t len ) { ctx->entropy_len = len; } -void mbedtls_ctr_drbg_set_reseed_interval( mbedtls_ctr_drbg_context *ctx, int interval ) +int mbedtls_ctr_drbg_set_nonce_len( mbedtls_ctr_drbg_context *ctx, + size_t len ) +{ + /* If mbedtls_ctr_drbg_seed() has already been called, it's + * too late. Return the error code that's closest to making sense. */ + if( ctx->f_entropy != NULL ) + return( MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED ); + + if( len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT ) + return( MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG ); +#if SIZE_MAX > INT_MAX + /* This shouldn't be an issue because + * MBEDTLS_CTR_DRBG_MAX_SEED_INPUT < INT_MAX in any sensible + * configuration, but make sure anyway. */ + if( len > INT_MAX ) + return( MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG ); +#endif + + /* For backward compatibility with Mbed TLS <= 2.19, store the + * entropy nonce length in a field that already exists, but isn't + * used until after the initial seeding. */ + /* Due to the capping of len above, the value fits in an int. */ + ctx->reseed_counter = (int) len; + return( 0 ); +} + +void mbedtls_ctr_drbg_set_reseed_interval( mbedtls_ctr_drbg_context *ctx, + int interval ) { ctx->reseed_interval = interval; } @@ -122,7 +125,8 @@ void mbedtls_ctr_drbg_set_reseed_interval( mbedtls_ctr_drbg_context *ctx, int in static int block_cipher_df( unsigned char *output, const unsigned char *data, size_t data_len ) { - unsigned char buf[MBEDTLS_CTR_DRBG_MAX_SEED_INPUT + MBEDTLS_CTR_DRBG_BLOCKSIZE + 16]; + unsigned char buf[MBEDTLS_CTR_DRBG_MAX_SEED_INPUT + + MBEDTLS_CTR_DRBG_BLOCKSIZE + 16]; unsigned char tmp[MBEDTLS_CTR_DRBG_SEEDLEN]; unsigned char key[MBEDTLS_CTR_DRBG_KEYSIZE]; unsigned char chain[MBEDTLS_CTR_DRBG_BLOCKSIZE]; @@ -136,7 +140,8 @@ static int block_cipher_df( unsigned char *output, if( data_len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT ) return( MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG ); - memset( buf, 0, MBEDTLS_CTR_DRBG_MAX_SEED_INPUT + MBEDTLS_CTR_DRBG_BLOCKSIZE + 16 ); + memset( buf, 0, MBEDTLS_CTR_DRBG_MAX_SEED_INPUT + + MBEDTLS_CTR_DRBG_BLOCKSIZE + 16 ); mbedtls_aes_init( &aes_ctx ); /* @@ -147,11 +152,8 @@ static int block_cipher_df( unsigned char *output, * (Total is padded to a multiple of 16-bytes with zeroes) */ p = buf + MBEDTLS_CTR_DRBG_BLOCKSIZE; - *p++ = ( data_len >> 24 ) & 0xff; - *p++ = ( data_len >> 16 ) & 0xff; - *p++ = ( data_len >> 8 ) & 0xff; - *p++ = ( data_len ) & 0xff; - p += 3; + MBEDTLS_PUT_UINT32_BE( data_len, p, 0); + p += 4 + 3; *p++ = MBEDTLS_CTR_DRBG_SEEDLEN; memcpy( p, data, data_len ); p[data_len] = 0x80; @@ -161,7 +163,8 @@ static int block_cipher_df( unsigned char *output, for( i = 0; i < MBEDTLS_CTR_DRBG_KEYSIZE; i++ ) key[i] = i; - if( ( ret = mbedtls_aes_setkey_enc( &aes_ctx, key, MBEDTLS_CTR_DRBG_KEYBITS ) ) != 0 ) + if( ( ret = mbedtls_aes_setkey_enc( &aes_ctx, key, + MBEDTLS_CTR_DRBG_KEYBITS ) ) != 0 ) { goto exit; } @@ -183,7 +186,8 @@ static int block_cipher_df( unsigned char *output, use_len -= ( use_len >= MBEDTLS_CTR_DRBG_BLOCKSIZE ) ? MBEDTLS_CTR_DRBG_BLOCKSIZE : use_len; - if( ( ret = mbedtls_aes_crypt_ecb( &aes_ctx, MBEDTLS_AES_ENCRYPT, chain, chain ) ) != 0 ) + if( ( ret = mbedtls_aes_crypt_ecb( &aes_ctx, MBEDTLS_AES_ENCRYPT, + chain, chain ) ) != 0 ) { goto exit; } @@ -200,7 +204,8 @@ static int block_cipher_df( unsigned char *output, /* * Do final encryption with reduced data */ - if( ( ret = mbedtls_aes_setkey_enc( &aes_ctx, tmp, MBEDTLS_CTR_DRBG_KEYBITS ) ) != 0 ) + if( ( ret = mbedtls_aes_setkey_enc( &aes_ctx, tmp, + MBEDTLS_CTR_DRBG_KEYBITS ) ) != 0 ) { goto exit; } @@ -209,7 +214,8 @@ static int block_cipher_df( unsigned char *output, for( j = 0; j < MBEDTLS_CTR_DRBG_SEEDLEN; j += MBEDTLS_CTR_DRBG_BLOCKSIZE ) { - if( ( ret = mbedtls_aes_crypt_ecb( &aes_ctx, MBEDTLS_AES_ENCRYPT, iv, iv ) ) != 0 ) + if( ( ret = mbedtls_aes_crypt_ecb( &aes_ctx, MBEDTLS_AES_ENCRYPT, + iv, iv ) ) != 0 ) { goto exit; } @@ -245,7 +251,7 @@ exit: * ctx->counter = V */ static int ctr_drbg_update_internal( mbedtls_ctr_drbg_context *ctx, - const unsigned char data[MBEDTLS_CTR_DRBG_SEEDLEN] ) + const unsigned char data[MBEDTLS_CTR_DRBG_SEEDLEN] ) { unsigned char tmp[MBEDTLS_CTR_DRBG_SEEDLEN]; unsigned char *p = tmp; @@ -266,8 +272,11 @@ static int ctr_drbg_update_internal( mbedtls_ctr_drbg_context *ctx, /* * Crypt counter block */ - if( ( ret = mbedtls_aes_crypt_ecb( &ctx->aes_ctx, MBEDTLS_AES_ENCRYPT, ctx->counter, p ) ) != 0 ) + if( ( ret = mbedtls_aes_crypt_ecb( &ctx->aes_ctx, MBEDTLS_AES_ENCRYPT, + ctx->counter, p ) ) != 0 ) + { goto exit; + } p += MBEDTLS_CTR_DRBG_BLOCKSIZE; } @@ -278,9 +287,13 @@ static int ctr_drbg_update_internal( mbedtls_ctr_drbg_context *ctx, /* * Update key and counter */ - if( ( ret = mbedtls_aes_setkey_enc( &ctx->aes_ctx, tmp, MBEDTLS_CTR_DRBG_KEYBITS ) ) != 0 ) + if( ( ret = mbedtls_aes_setkey_enc( &ctx->aes_ctx, tmp, + MBEDTLS_CTR_DRBG_KEYBITS ) ) != 0 ) + { goto exit; - memcpy( ctx->counter, tmp + MBEDTLS_CTR_DRBG_KEYSIZE, MBEDTLS_CTR_DRBG_BLOCKSIZE ); + } + memcpy( ctx->counter, tmp + MBEDTLS_CTR_DRBG_KEYSIZE, + MBEDTLS_CTR_DRBG_BLOCKSIZE ); exit: mbedtls_platform_zeroize( tmp, sizeof( tmp ) ); @@ -304,7 +317,7 @@ int mbedtls_ctr_drbg_update_ret( mbedtls_ctr_drbg_context *ctx, size_t add_len ) { unsigned char add_input[MBEDTLS_CTR_DRBG_SEEDLEN]; - int ret; + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; if( add_len == 0 ) return( 0 ); @@ -333,7 +346,7 @@ void mbedtls_ctr_drbg_update( mbedtls_ctr_drbg_context *ctx, #endif /* MBEDTLS_DEPRECATED_REMOVED */ /* CTR_DRBG_Reseed with derivation function (SP 800-90A §10.2.1.4.2) - * mbedtls_ctr_drbg_reseed(ctx, additional, len) + * mbedtls_ctr_drbg_reseed(ctx, additional, len, nonce_len) * implements * CTR_DRBG_Reseed(working_state, entropy_input, additional_input) * -> new_working_state @@ -341,51 +354,57 @@ void mbedtls_ctr_drbg_update( mbedtls_ctr_drbg_context *ctx, * ctx contains working_state * additional[:len] = additional_input * and entropy_input comes from calling ctx->f_entropy + * for (ctx->entropy_len + nonce_len) bytes * and with output * ctx contains new_working_state */ -int mbedtls_ctr_drbg_reseed( mbedtls_ctr_drbg_context *ctx, - const unsigned char *additional, size_t len ) +static int mbedtls_ctr_drbg_reseed_internal( mbedtls_ctr_drbg_context *ctx, + const unsigned char *additional, + size_t len, + size_t nonce_len ) { unsigned char seed[MBEDTLS_CTR_DRBG_MAX_SEED_INPUT]; size_t seedlen = 0; - int ret; + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - if( ctx->entropy_len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT || - len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT - ctx->entropy_len ) + if( ctx->entropy_len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT ) + return( MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG ); + if( nonce_len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT - ctx->entropy_len ) + return( MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG ); + if( len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT - ctx->entropy_len - nonce_len ) return( MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG ); memset( seed, 0, MBEDTLS_CTR_DRBG_MAX_SEED_INPUT ); - /* - * Gather entropy_len bytes of entropy to seed state - */ - if( 0 != ctx->f_entropy( ctx->p_entropy, seed, - ctx->entropy_len ) ) + /* Gather entropy_len bytes of entropy to seed state. */ + if( 0 != ctx->f_entropy( ctx->p_entropy, seed, ctx->entropy_len ) ) { return( MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED ); } - seedlen += ctx->entropy_len; - /* - * Add additional data - */ - if( additional && len ) + /* Gather entropy for a nonce if requested. */ + if( nonce_len != 0 ) + { + if( 0 != ctx->f_entropy( ctx->p_entropy, seed + seedlen, nonce_len ) ) + { + return( MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED ); + } + seedlen += nonce_len; + } + + /* Add additional data if provided. */ + if( additional != NULL && len != 0 ) { memcpy( seed + seedlen, additional, len ); seedlen += len; } - /* - * Reduce to 384 bits - */ + /* Reduce to 384 bits. */ if( ( ret = block_cipher_df( seed, seed, seedlen ) ) != 0 ) goto exit; - /* - * Update state - */ + /* Update state. */ if( ( ret = ctr_drbg_update_internal( ctx, seed ) ) != 0 ) goto exit; ctx->reseed_counter = 1; @@ -395,6 +414,25 @@ exit: return( ret ); } +int mbedtls_ctr_drbg_reseed( mbedtls_ctr_drbg_context *ctx, + const unsigned char *additional, size_t len ) +{ + return( mbedtls_ctr_drbg_reseed_internal( ctx, additional, len, 0 ) ); +} + +/* Return a "good" nonce length for CTR_DRBG. The chosen nonce length + * is sufficient to achieve the maximum security strength given the key + * size and entropy length. If there is enough entropy in the initial + * call to the entropy function to serve as both the entropy input and + * the nonce, don't make a second call to get a nonce. */ +static size_t good_nonce_len( size_t entropy_len ) +{ + if( entropy_len >= MBEDTLS_CTR_DRBG_KEYSIZE * 3 / 2 ) + return( 0 ); + else + return( ( entropy_len + 1 ) / 2 ); +} + /* CTR_DRBG_Instantiate with derivation function (SP 800-90A §10.2.1.3.2) * mbedtls_ctr_drbg_seed(ctx, f_entropy, p_entropy, custom, len) * implements @@ -412,8 +450,9 @@ int mbedtls_ctr_drbg_seed( mbedtls_ctr_drbg_context *ctx, const unsigned char *custom, size_t len ) { - int ret; + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; unsigned char key[MBEDTLS_CTR_DRBG_KEYSIZE]; + size_t nonce_len; memset( key, 0, MBEDTLS_CTR_DRBG_KEYSIZE ); @@ -429,33 +468,30 @@ int mbedtls_ctr_drbg_seed( mbedtls_ctr_drbg_context *ctx, if( ctx->entropy_len == 0 ) ctx->entropy_len = MBEDTLS_CTR_DRBG_ENTROPY_LEN; - - /* - * Initialize with an empty key - */ - if( ( ret = mbedtls_aes_setkey_enc( &ctx->aes_ctx, key, MBEDTLS_CTR_DRBG_KEYBITS ) ) != 0 ) + /* ctx->reseed_counter contains the desired amount of entropy to + * grab for a nonce (see mbedtls_ctr_drbg_set_nonce_len()). + * If it's -1, indicating that the entropy nonce length was not set + * explicitly, use a sufficiently large nonce for security. */ + nonce_len = ( ctx->reseed_counter >= 0 ? + (size_t) ctx->reseed_counter : + good_nonce_len( ctx->entropy_len ) ); + + /* Initialize with an empty key. */ + if( ( ret = mbedtls_aes_setkey_enc( &ctx->aes_ctx, key, + MBEDTLS_CTR_DRBG_KEYBITS ) ) != 0 ) { return( ret ); } - if( ( ret = mbedtls_ctr_drbg_reseed( ctx, custom, len ) ) != 0 ) + /* Do the initial seeding. */ + if( ( ret = mbedtls_ctr_drbg_reseed_internal( ctx, custom, len, + nonce_len ) ) != 0 ) { return( ret ); } return( 0 ); } -/* Backward compatibility wrapper */ -int mbedtls_ctr_drbg_seed_entropy_len( - mbedtls_ctr_drbg_context *ctx, - int (*f_entropy)(void *, unsigned char *, size_t), void *p_entropy, - const unsigned char *custom, size_t len, - size_t entropy_len ) -{ - mbedtls_ctr_drbg_set_entropy_len( ctx, entropy_len ); - return( mbedtls_ctr_drbg_seed( ctx, f_entropy, p_entropy, custom, len ) ); -} - /* CTR_DRBG_Generate with derivation function (SP 800-90A §10.2.1.5.2) * mbedtls_ctr_drbg_random_with_add(ctx, output, output_len, additional, add_len) * implements @@ -525,11 +561,14 @@ int mbedtls_ctr_drbg_random_with_add( void *p_rng, /* * Crypt counter block */ - if( ( ret = mbedtls_aes_crypt_ecb( &ctx->aes_ctx, MBEDTLS_AES_ENCRYPT, ctx->counter, tmp ) ) != 0 ) + if( ( ret = mbedtls_aes_crypt_ecb( &ctx->aes_ctx, MBEDTLS_AES_ENCRYPT, + ctx->counter, tmp ) ) != 0 ) + { goto exit; + } - use_len = ( output_len > MBEDTLS_CTR_DRBG_BLOCKSIZE ) ? MBEDTLS_CTR_DRBG_BLOCKSIZE : - output_len; + use_len = ( output_len > MBEDTLS_CTR_DRBG_BLOCKSIZE ) + ? MBEDTLS_CTR_DRBG_BLOCKSIZE : output_len; /* * Copy random block to destination */ @@ -549,9 +588,10 @@ exit: return( ret ); } -int mbedtls_ctr_drbg_random( void *p_rng, unsigned char *output, size_t output_len ) +int mbedtls_ctr_drbg_random( void *p_rng, unsigned char *output, + size_t output_len ) { - int ret; + int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; mbedtls_ctr_drbg_context *ctx = (mbedtls_ctr_drbg_context *) p_rng; #if defined(MBEDTLS_THREADING_C) @@ -570,7 +610,8 @@ int mbedtls_ctr_drbg_random( void *p_rng, unsigned char *output, size_t output_l } #if defined(MBEDTLS_FS_IO) -int mbedtls_ctr_drbg_write_seed_file( mbedtls_ctr_drbg_context *ctx, const char *path ) +int mbedtls_ctr_drbg_write_seed_file( mbedtls_ctr_drbg_context *ctx, + const char *path ) { int ret = MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR; FILE *f; @@ -579,13 +620,19 @@ int mbedtls_ctr_drbg_write_seed_file( mbedtls_ctr_drbg_context *ctx, const char if( ( f = fopen( path, "wb" ) ) == NULL ) return( MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR ); - if( ( ret = mbedtls_ctr_drbg_random( ctx, buf, MBEDTLS_CTR_DRBG_MAX_INPUT ) ) != 0 ) + if( ( ret = mbedtls_ctr_drbg_random( ctx, buf, + MBEDTLS_CTR_DRBG_MAX_INPUT ) ) != 0 ) goto exit; - if( fwrite( buf, 1, MBEDTLS_CTR_DRBG_MAX_INPUT, f ) != MBEDTLS_CTR_DRBG_MAX_INPUT ) + if( fwrite( buf, 1, MBEDTLS_CTR_DRBG_MAX_INPUT, f ) != + MBEDTLS_CTR_DRBG_MAX_INPUT ) + { ret = MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR; + } else + { ret = 0; + } exit: mbedtls_platform_zeroize( buf, sizeof( buf ) ); @@ -594,7 +641,8 @@ exit: return( ret ); } -int mbedtls_ctr_drbg_update_seed_file( mbedtls_ctr_drbg_context *ctx, const char *path ) +int mbedtls_ctr_drbg_update_seed_file( mbedtls_ctr_drbg_context *ctx, + const char *path ) { int ret = 0; FILE *f = NULL; @@ -633,45 +681,135 @@ exit: #if defined(MBEDTLS_SELF_TEST) -static const unsigned char entropy_source_pr[96] = - { 0xc1, 0x80, 0x81, 0xa6, 0x5d, 0x44, 0x02, 0x16, - 0x19, 0xb3, 0xf1, 0x80, 0xb1, 0xc9, 0x20, 0x02, - 0x6a, 0x54, 0x6f, 0x0c, 0x70, 0x81, 0x49, 0x8b, - 0x6e, 0xa6, 0x62, 0x52, 0x6d, 0x51, 0xb1, 0xcb, - 0x58, 0x3b, 0xfa, 0xd5, 0x37, 0x5f, 0xfb, 0xc9, - 0xff, 0x46, 0xd2, 0x19, 0xc7, 0x22, 0x3e, 0x95, - 0x45, 0x9d, 0x82, 0xe1, 0xe7, 0x22, 0x9f, 0x63, - 0x31, 0x69, 0xd2, 0x6b, 0x57, 0x47, 0x4f, 0xa3, - 0x37, 0xc9, 0x98, 0x1c, 0x0b, 0xfb, 0x91, 0x31, - 0x4d, 0x55, 0xb9, 0xe9, 0x1c, 0x5a, 0x5e, 0xe4, - 0x93, 0x92, 0xcf, 0xc5, 0x23, 0x12, 0xd5, 0x56, - 0x2c, 0x4a, 0x6e, 0xff, 0xdc, 0x10, 0xd0, 0x68 }; - -static const unsigned char entropy_source_nopr[64] = - { 0x5a, 0x19, 0x4d, 0x5e, 0x2b, 0x31, 0x58, 0x14, - 0x54, 0xde, 0xf6, 0x75, 0xfb, 0x79, 0x58, 0xfe, - 0xc7, 0xdb, 0x87, 0x3e, 0x56, 0x89, 0xfc, 0x9d, - 0x03, 0x21, 0x7c, 0x68, 0xd8, 0x03, 0x38, 0x20, - 0xf9, 0xe6, 0x5e, 0x04, 0xd8, 0x56, 0xf3, 0xa9, - 0xc4, 0x4a, 0x4c, 0xbd, 0xc1, 0xd0, 0x08, 0x46, - 0xf5, 0x98, 0x3d, 0x77, 0x1c, 0x1b, 0x13, 0x7e, - 0x4e, 0x0f, 0x9d, 0x8e, 0xf4, 0x09, 0xf9, 0x2e }; - -static const unsigned char nonce_pers_pr[16] = - { 0xd2, 0x54, 0xfc, 0xff, 0x02, 0x1e, 0x69, 0xd2, - 0x29, 0xc9, 0xcf, 0xad, 0x85, 0xfa, 0x48, 0x6c }; - -static const unsigned char nonce_pers_nopr[16] = - { 0x1b, 0x54, 0xb8, 0xff, 0x06, 0x42, 0xbf, 0xf5, - 0x21, 0xf1, 0x5c, 0x1c, 0x0b, 0x66, 0x5f, 0x3f }; - -static const unsigned char result_pr[16] = - { 0x34, 0x01, 0x16, 0x56, 0xb4, 0x29, 0x00, 0x8f, - 0x35, 0x63, 0xec, 0xb5, 0xf2, 0x59, 0x07, 0x23 }; - -static const unsigned char result_nopr[16] = - { 0xa0, 0x54, 0x30, 0x3d, 0x8a, 0x7e, 0xa9, 0x88, - 0x9d, 0x90, 0x3e, 0x07, 0x7c, 0x6f, 0x21, 0x8f }; +/* The CTR_DRBG NIST test vectors used here are available at + * https://csrc.nist.gov/CSRC/media/Projects/Cryptographic-Algorithm-Validation-Program/documents/drbg/drbgtestvectors.zip + * + * The parameters used to derive the test data are: + * + * [AES-128 use df] + * [PredictionResistance = True/False] + * [EntropyInputLen = 128] + * [NonceLen = 64] + * [PersonalizationStringLen = 128] + * [AdditionalInputLen = 0] + * [ReturnedBitsLen = 512] + * + * [AES-256 use df] + * [PredictionResistance = True/False] + * [EntropyInputLen = 256] + * [NonceLen = 128] + * [PersonalizationStringLen = 256] + * [AdditionalInputLen = 0] + * [ReturnedBitsLen = 512] + * + */ + +#if defined(MBEDTLS_CTR_DRBG_USE_128_BIT_KEY) +static const unsigned char entropy_source_pr[] = + { 0x04, 0xd9, 0x49, 0xa6, 0xdc, 0xe8, 0x6e, 0xbb, + 0xf1, 0x08, 0x77, 0x2b, 0x9e, 0x08, 0xca, 0x92, + 0x65, 0x16, 0xda, 0x99, 0xa2, 0x59, 0xf3, 0xe8, + 0x38, 0x7e, 0x3f, 0x6b, 0x51, 0x70, 0x7b, 0x20, + 0xec, 0x53, 0xd0, 0x66, 0xc3, 0x0f, 0xe3, 0xb0, + 0xe0, 0x86, 0xa6, 0xaa, 0x5f, 0x72, 0x2f, 0xad, + 0xf7, 0xef, 0x06, 0xb8, 0xd6, 0x9c, 0x9d, 0xe8 }; + +static const unsigned char entropy_source_nopr[] = + { 0x07, 0x0d, 0x59, 0x63, 0x98, 0x73, 0xa5, 0x45, + 0x27, 0x38, 0x22, 0x7b, 0x76, 0x85, 0xd1, 0xa9, + 0x74, 0x18, 0x1f, 0x3c, 0x22, 0xf6, 0x49, 0x20, + 0x4a, 0x47, 0xc2, 0xf3, 0x85, 0x16, 0xb4, 0x6f, + 0x00, 0x2e, 0x71, 0xda, 0xed, 0x16, 0x9b, 0x5c }; + +static const unsigned char pers_pr[] = + { 0xbf, 0xa4, 0x9a, 0x8f, 0x7b, 0xd8, 0xb1, 0x7a, + 0x9d, 0xfa, 0x45, 0xed, 0x21, 0x52, 0xb3, 0xad }; + +static const unsigned char pers_nopr[] = + { 0x4e, 0x61, 0x79, 0xd4, 0xc2, 0x72, 0xa1, 0x4c, + 0xf1, 0x3d, 0xf6, 0x5e, 0xa3, 0xa6, 0xe5, 0x0f }; + +static const unsigned char result_pr[] = + { 0xc9, 0x0a, 0xaf, 0x85, 0x89, 0x71, 0x44, 0x66, + 0x4f, 0x25, 0x0b, 0x2b, 0xde, 0xd8, 0xfa, 0xff, + 0x52, 0x5a, 0x1b, 0x32, 0x5e, 0x41, 0x7a, 0x10, + 0x1f, 0xef, 0x1e, 0x62, 0x23, 0xe9, 0x20, 0x30, + 0xc9, 0x0d, 0xad, 0x69, 0xb4, 0x9c, 0x5b, 0xf4, + 0x87, 0x42, 0xd5, 0xae, 0x5e, 0x5e, 0x43, 0xcc, + 0xd9, 0xfd, 0x0b, 0x93, 0x4a, 0xe3, 0xd4, 0x06, + 0x37, 0x36, 0x0f, 0x3f, 0x72, 0x82, 0x0c, 0xcf }; + +static const unsigned char result_nopr[] = + { 0x31, 0xc9, 0x91, 0x09, 0xf8, 0xc5, 0x10, 0x13, + 0x3c, 0xd3, 0x96, 0xf9, 0xbc, 0x2c, 0x12, 0xc0, + 0x7c, 0xc1, 0x61, 0x5f, 0xa3, 0x09, 0x99, 0xaf, + 0xd7, 0xf2, 0x36, 0xfd, 0x40, 0x1a, 0x8b, 0xf2, + 0x33, 0x38, 0xee, 0x1d, 0x03, 0x5f, 0x83, 0xb7, + 0xa2, 0x53, 0xdc, 0xee, 0x18, 0xfc, 0xa7, 0xf2, + 0xee, 0x96, 0xc6, 0xc2, 0xcd, 0x0c, 0xff, 0x02, + 0x76, 0x70, 0x69, 0xaa, 0x69, 0xd1, 0x3b, 0xe8 }; +#else /* MBEDTLS_CTR_DRBG_USE_128_BIT_KEY */ + +static const unsigned char entropy_source_pr[] = + { 0xca, 0x58, 0xfd, 0xf2, 0xb9, 0x77, 0xcb, 0x49, + 0xd4, 0xe0, 0x5b, 0xe2, 0x39, 0x50, 0xd9, 0x8a, + 0x6a, 0xb3, 0xc5, 0x2f, 0xdf, 0x74, 0xd5, 0x85, + 0x8f, 0xd1, 0xba, 0x64, 0x54, 0x7b, 0xdb, 0x1e, + 0xc5, 0xea, 0x24, 0xc0, 0xfa, 0x0c, 0x90, 0x15, + 0x09, 0x20, 0x92, 0x42, 0x32, 0x36, 0x45, 0x45, + 0x7d, 0x20, 0x76, 0x6b, 0xcf, 0xa2, 0x15, 0xc8, + 0x2f, 0x9f, 0xbc, 0x88, 0x3f, 0x80, 0xd1, 0x2c, + 0xb7, 0x16, 0xd1, 0x80, 0x9e, 0xe1, 0xc9, 0xb3, + 0x88, 0x1b, 0x21, 0x45, 0xef, 0xa1, 0x7f, 0xce, + 0xc8, 0x92, 0x35, 0x55, 0x2a, 0xd9, 0x1d, 0x8e, + 0x12, 0x38, 0xac, 0x01, 0x4e, 0x38, 0x18, 0x76, + 0x9c, 0xf2, 0xb6, 0xd4, 0x13, 0xb6, 0x2c, 0x77, + 0xc0, 0xe7, 0xe6, 0x0c, 0x47, 0x44, 0x95, 0xbe }; + +static const unsigned char entropy_source_nopr[] = + { 0x4c, 0xfb, 0x21, 0x86, 0x73, 0x34, 0x6d, 0x9d, + 0x50, 0xc9, 0x22, 0xe4, 0x9b, 0x0d, 0xfc, 0xd0, + 0x90, 0xad, 0xf0, 0x4f, 0x5c, 0x3b, 0xa4, 0x73, + 0x27, 0xdf, 0xcd, 0x6f, 0xa6, 0x3a, 0x78, 0x5c, + 0x01, 0x69, 0x62, 0xa7, 0xfd, 0x27, 0x87, 0xa2, + 0x4b, 0xf6, 0xbe, 0x47, 0xef, 0x37, 0x83, 0xf1, + 0xb7, 0xec, 0x46, 0x07, 0x23, 0x63, 0x83, 0x4a, + 0x1b, 0x01, 0x33, 0xf2, 0xc2, 0x38, 0x91, 0xdb, + 0x4f, 0x11, 0xa6, 0x86, 0x51, 0xf2, 0x3e, 0x3a, + 0x8b, 0x1f, 0xdc, 0x03, 0xb1, 0x92, 0xc7, 0xe7 }; + +static const unsigned char pers_pr[] = + { 0x5a, 0x70, 0x95, 0xe9, 0x81, 0x40, 0x52, 0x33, + 0x91, 0x53, 0x7e, 0x75, 0xd6, 0x19, 0x9d, 0x1e, + 0xad, 0x0d, 0xc6, 0xa7, 0xde, 0x6c, 0x1f, 0xe0, + 0xea, 0x18, 0x33, 0xa8, 0x7e, 0x06, 0x20, 0xe9 }; + +static const unsigned char pers_nopr[] = + { 0x88, 0xee, 0xb8, 0xe0, 0xe8, 0x3b, 0xf3, 0x29, + 0x4b, 0xda, 0xcd, 0x60, 0x99, 0xeb, 0xe4, 0xbf, + 0x55, 0xec, 0xd9, 0x11, 0x3f, 0x71, 0xe5, 0xeb, + 0xcb, 0x45, 0x75, 0xf3, 0xd6, 0xa6, 0x8a, 0x6b }; + +static const unsigned char result_pr[] = + { 0xce, 0x2f, 0xdb, 0xb6, 0xd9, 0xb7, 0x39, 0x85, + 0x04, 0xc5, 0xc0, 0x42, 0xc2, 0x31, 0xc6, 0x1d, + 0x9b, 0x5a, 0x59, 0xf8, 0x7e, 0x0d, 0xcc, 0x62, + 0x7b, 0x65, 0x11, 0x55, 0x10, 0xeb, 0x9e, 0x3d, + 0xa4, 0xfb, 0x1c, 0x6a, 0x18, 0xc0, 0x74, 0xdb, + 0xdd, 0xe7, 0x02, 0x23, 0x63, 0x21, 0xd0, 0x39, + 0xf9, 0xa7, 0xc4, 0x52, 0x84, 0x3b, 0x49, 0x40, + 0x72, 0x2b, 0xb0, 0x6c, 0x9c, 0xdb, 0xc3, 0x43 }; + +static const unsigned char result_nopr[] = + { 0xa5, 0x51, 0x80, 0xa1, 0x90, 0xbe, 0xf3, 0xad, + 0xaf, 0x28, 0xf6, 0xb7, 0x95, 0xe9, 0xf1, 0xf3, + 0xd6, 0xdf, 0xa1, 0xb2, 0x7d, 0xd0, 0x46, 0x7b, + 0x0c, 0x75, 0xf5, 0xfa, 0x93, 0x1e, 0x97, 0x14, + 0x75, 0xb2, 0x7c, 0xae, 0x03, 0xa2, 0x96, 0x54, + 0xe2, 0xf4, 0x09, 0x66, 0xea, 0x33, 0x64, 0x30, + 0x40, 0xd1, 0x40, 0x0f, 0xe6, 0x77, 0x87, 0x3a, + 0xf8, 0x09, 0x7c, 0x1f, 0xe9, 0xf0, 0x02, 0x98 }; +#endif /* MBEDTLS_CTR_DRBG_USE_128_BIT_KEY */ static size_t test_offset; static int ctr_drbg_self_test_entropy( void *data, unsigned char *buf, @@ -690,13 +828,15 @@ static int ctr_drbg_self_test_entropy( void *data, unsigned char *buf, return( 1 ); \ } +#define SELF_TEST_OUPUT_DISCARD_LENGTH 64 + /* * Checkup routine */ int mbedtls_ctr_drbg_self_test( int verbose ) { mbedtls_ctr_drbg_context ctx; - unsigned char buf[16]; + unsigned char buf[ sizeof( result_pr ) ]; mbedtls_ctr_drbg_init( &ctx ); @@ -707,15 +847,16 @@ int mbedtls_ctr_drbg_self_test( int verbose ) mbedtls_printf( " CTR_DRBG (PR = TRUE) : " ); test_offset = 0; - mbedtls_ctr_drbg_set_entropy_len( &ctx, 32 ); + mbedtls_ctr_drbg_set_entropy_len( &ctx, MBEDTLS_CTR_DRBG_KEYSIZE ); + mbedtls_ctr_drbg_set_nonce_len( &ctx, MBEDTLS_CTR_DRBG_KEYSIZE / 2 ); CHK( mbedtls_ctr_drbg_seed( &ctx, ctr_drbg_self_test_entropy, (void *) entropy_source_pr, - nonce_pers_pr, 16 ) ); + pers_pr, MBEDTLS_CTR_DRBG_KEYSIZE ) ); mbedtls_ctr_drbg_set_prediction_resistance( &ctx, MBEDTLS_CTR_DRBG_PR_ON ); - CHK( mbedtls_ctr_drbg_random( &ctx, buf, MBEDTLS_CTR_DRBG_BLOCKSIZE ) ); - CHK( mbedtls_ctr_drbg_random( &ctx, buf, MBEDTLS_CTR_DRBG_BLOCKSIZE ) ); - CHK( memcmp( buf, result_pr, MBEDTLS_CTR_DRBG_BLOCKSIZE ) ); + CHK( mbedtls_ctr_drbg_random( &ctx, buf, SELF_TEST_OUPUT_DISCARD_LENGTH ) ); + CHK( mbedtls_ctr_drbg_random( &ctx, buf, sizeof( result_pr ) ) ); + CHK( memcmp( buf, result_pr, sizeof( result_pr ) ) ); mbedtls_ctr_drbg_free( &ctx ); @@ -731,15 +872,16 @@ int mbedtls_ctr_drbg_self_test( int verbose ) mbedtls_ctr_drbg_init( &ctx ); test_offset = 0; - mbedtls_ctr_drbg_set_entropy_len( &ctx, 32 ); + mbedtls_ctr_drbg_set_entropy_len( &ctx, MBEDTLS_CTR_DRBG_KEYSIZE); + mbedtls_ctr_drbg_set_nonce_len( &ctx, MBEDTLS_CTR_DRBG_KEYSIZE / 2 ); CHK( mbedtls_ctr_drbg_seed( &ctx, ctr_drbg_self_test_entropy, (void *) entropy_source_nopr, - nonce_pers_nopr, 16 ) ); - CHK( mbedtls_ctr_drbg_random( &ctx, buf, 16 ) ); + pers_nopr, MBEDTLS_CTR_DRBG_KEYSIZE ) ); CHK( mbedtls_ctr_drbg_reseed( &ctx, NULL, 0 ) ); - CHK( mbedtls_ctr_drbg_random( &ctx, buf, 16 ) ); - CHK( memcmp( buf, result_nopr, 16 ) ); + CHK( mbedtls_ctr_drbg_random( &ctx, buf, SELF_TEST_OUPUT_DISCARD_LENGTH ) ); + CHK( mbedtls_ctr_drbg_random( &ctx, buf, sizeof( result_nopr ) ) ); + CHK( memcmp( buf, result_nopr, sizeof( result_nopr ) ) ); mbedtls_ctr_drbg_free( &ctx ); |