diff options
Diffstat (limited to 'thirdparty/mbedtls/library/ctr_drbg.c')
| -rw-r--r-- | thirdparty/mbedtls/library/ctr_drbg.c | 738 |
1 files changed, 376 insertions, 362 deletions
diff --git a/thirdparty/mbedtls/library/ctr_drbg.c b/thirdparty/mbedtls/library/ctr_drbg.c index ed31576a7b..652c5cbc28 100644 --- a/thirdparty/mbedtls/library/ctr_drbg.c +++ b/thirdparty/mbedtls/library/ctr_drbg.c @@ -41,9 +41,9 @@ /* * CTR_DRBG context initialization */ -void mbedtls_ctr_drbg_init( mbedtls_ctr_drbg_context *ctx ) +void mbedtls_ctr_drbg_init(mbedtls_ctr_drbg_context *ctx) { - memset( ctx, 0, sizeof( mbedtls_ctr_drbg_context ) ); + 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; @@ -55,50 +55,55 @@ void mbedtls_ctr_drbg_init( mbedtls_ctr_drbg_context *ctx ) * This function resets CTR_DRBG context to the state immediately * after initial call of mbedtls_ctr_drbg_init(). */ -void mbedtls_ctr_drbg_free( mbedtls_ctr_drbg_context *ctx ) +void mbedtls_ctr_drbg_free(mbedtls_ctr_drbg_context *ctx) { - if( ctx == NULL ) + if (ctx == NULL) { return; + } #if defined(MBEDTLS_THREADING_C) /* The mutex is initialized iff f_entropy is set. */ - if( ctx->f_entropy != NULL ) - mbedtls_mutex_free( &ctx->mutex ); + if (ctx->f_entropy != NULL) { + mbedtls_mutex_free(&ctx->mutex); + } #endif - mbedtls_aes_free( &ctx->aes_ctx ); - mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ctr_drbg_context ) ); + 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; } -int mbedtls_ctr_drbg_set_nonce_len( mbedtls_ctr_drbg_context *ctx, - size_t len ) +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 (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 (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 ); + if (len > INT_MAX) { + return MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG; + } #endif /* For backward compatibility with Mbed TLS <= 2.19, store the @@ -106,17 +111,17 @@ int mbedtls_ctr_drbg_set_nonce_len( mbedtls_ctr_drbg_context *ctx, * 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 ); + return 0; } -void mbedtls_ctr_drbg_set_reseed_interval( mbedtls_ctr_drbg_context *ctx, - int interval ) +void mbedtls_ctr_drbg_set_reseed_interval(mbedtls_ctr_drbg_context *ctx, + int interval) { ctx->reseed_interval = interval; } -static int block_cipher_df( unsigned char *output, - const unsigned char *data, size_t data_len ) +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]; @@ -130,12 +135,13 @@ static int block_cipher_df( unsigned char *output, int i, j; size_t buf_len, use_len; - if( data_len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT ) - return( MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG ); + 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 ); - mbedtls_aes_init( &aes_ctx ); + memset(buf, 0, MBEDTLS_CTR_DRBG_MAX_SEED_INPUT + + MBEDTLS_CTR_DRBG_BLOCKSIZE + 16); + mbedtls_aes_init(&aes_ctx); /* * Construct IV (16 bytes) and S in buffer @@ -145,48 +151,46 @@ 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; - MBEDTLS_PUT_UINT32_BE( data_len, p, 0); + MBEDTLS_PUT_UINT32_BE(data_len, p, 0); p += 4 + 3; *p++ = MBEDTLS_CTR_DRBG_SEEDLEN; - memcpy( p, data, data_len ); + memcpy(p, data, data_len); p[data_len] = 0x80; buf_len = MBEDTLS_CTR_DRBG_BLOCKSIZE + 8 + data_len + 1; - for( i = 0; i < MBEDTLS_CTR_DRBG_KEYSIZE; i++ ) + 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; } /* * Reduce data to MBEDTLS_CTR_DRBG_SEEDLEN bytes of data */ - for( j = 0; j < MBEDTLS_CTR_DRBG_SEEDLEN; j += MBEDTLS_CTR_DRBG_BLOCKSIZE ) - { + for (j = 0; j < MBEDTLS_CTR_DRBG_SEEDLEN; j += MBEDTLS_CTR_DRBG_BLOCKSIZE) { p = buf; - memset( chain, 0, MBEDTLS_CTR_DRBG_BLOCKSIZE ); + memset(chain, 0, MBEDTLS_CTR_DRBG_BLOCKSIZE); use_len = buf_len; - while( use_len > 0 ) - { - for( i = 0; i < MBEDTLS_CTR_DRBG_BLOCKSIZE; i++ ) + while (use_len > 0) { + for (i = 0; i < MBEDTLS_CTR_DRBG_BLOCKSIZE; i++) { chain[i] ^= p[i]; + } p += MBEDTLS_CTR_DRBG_BLOCKSIZE; - use_len -= ( use_len >= MBEDTLS_CTR_DRBG_BLOCKSIZE ) ? + 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; } } - memcpy( tmp + j, chain, MBEDTLS_CTR_DRBG_BLOCKSIZE ); + memcpy(tmp + j, chain, MBEDTLS_CTR_DRBG_BLOCKSIZE); /* * Update IV @@ -197,42 +201,38 @@ 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; } iv = tmp + MBEDTLS_CTR_DRBG_KEYSIZE; p = 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 ) - { + 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) { goto exit; } - memcpy( p, iv, MBEDTLS_CTR_DRBG_BLOCKSIZE ); + memcpy(p, iv, MBEDTLS_CTR_DRBG_BLOCKSIZE); p += MBEDTLS_CTR_DRBG_BLOCKSIZE; } exit: - mbedtls_aes_free( &aes_ctx ); + mbedtls_aes_free(&aes_ctx); /* - * tidy up the stack - */ - mbedtls_platform_zeroize( buf, sizeof( buf ) ); - mbedtls_platform_zeroize( tmp, sizeof( tmp ) ); - mbedtls_platform_zeroize( key, sizeof( key ) ); - mbedtls_platform_zeroize( chain, sizeof( chain ) ); - if( 0 != ret ) - { + * tidy up the stack + */ + mbedtls_platform_zeroize(buf, sizeof(buf)); + mbedtls_platform_zeroize(tmp, sizeof(tmp)); + mbedtls_platform_zeroize(key, sizeof(key)); + mbedtls_platform_zeroize(chain, sizeof(chain)); + if (0 != ret) { /* - * wipe partial seed from memory - */ - mbedtls_platform_zeroize( output, MBEDTLS_CTR_DRBG_SEEDLEN ); + * wipe partial seed from memory + */ + mbedtls_platform_zeroize(output, MBEDTLS_CTR_DRBG_SEEDLEN); } - return( ret ); + return ret; } /* CTR_DRBG_Update (SP 800-90A §10.2.1.2) @@ -243,54 +243,54 @@ exit: * ctx->aes_ctx = Key * ctx->counter = V */ -static int ctr_drbg_update_internal( mbedtls_ctr_drbg_context *ctx, - const unsigned char data[MBEDTLS_CTR_DRBG_SEEDLEN] ) +static int ctr_drbg_update_internal(mbedtls_ctr_drbg_context *ctx, + const unsigned char data[MBEDTLS_CTR_DRBG_SEEDLEN]) { unsigned char tmp[MBEDTLS_CTR_DRBG_SEEDLEN]; unsigned char *p = tmp; int i, j; int ret = 0; - memset( tmp, 0, MBEDTLS_CTR_DRBG_SEEDLEN ); + memset(tmp, 0, MBEDTLS_CTR_DRBG_SEEDLEN); - for( j = 0; j < MBEDTLS_CTR_DRBG_SEEDLEN; j += MBEDTLS_CTR_DRBG_BLOCKSIZE ) - { + for (j = 0; j < MBEDTLS_CTR_DRBG_SEEDLEN; j += MBEDTLS_CTR_DRBG_BLOCKSIZE) { /* * Increase counter */ - for( i = MBEDTLS_CTR_DRBG_BLOCKSIZE; i > 0; i-- ) - if( ++ctx->counter[i - 1] != 0 ) + for (i = MBEDTLS_CTR_DRBG_BLOCKSIZE; i > 0; i--) { + if (++ctx->counter[i - 1] != 0) { break; + } + } /* * 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; } - for( i = 0; i < MBEDTLS_CTR_DRBG_SEEDLEN; i++ ) + for (i = 0; i < MBEDTLS_CTR_DRBG_SEEDLEN; i++) { tmp[i] ^= data[i]; + } /* * 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 ) ); - return( ret ); + mbedtls_platform_zeroize(tmp, sizeof(tmp)); + return ret; } /* CTR_DRBG_Instantiate with derivation function (SP 800-90A §10.2.1.3.2) @@ -305,36 +305,40 @@ exit: * and with outputs * ctx = initial_working_state */ -int mbedtls_ctr_drbg_update_ret( mbedtls_ctr_drbg_context *ctx, - const unsigned char *additional, - size_t add_len ) +int mbedtls_ctr_drbg_update_ret(mbedtls_ctr_drbg_context *ctx, + const unsigned char *additional, + size_t add_len) { unsigned char add_input[MBEDTLS_CTR_DRBG_SEEDLEN]; int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - if( add_len == 0 ) - return( 0 ); + if (add_len == 0) { + return 0; + } - if( ( ret = block_cipher_df( add_input, additional, add_len ) ) != 0 ) + if ((ret = block_cipher_df(add_input, additional, add_len)) != 0) { goto exit; - if( ( ret = ctr_drbg_update_internal( ctx, add_input ) ) != 0 ) + } + if ((ret = ctr_drbg_update_internal(ctx, add_input)) != 0) { goto exit; + } exit: - mbedtls_platform_zeroize( add_input, sizeof( add_input ) ); - return( ret ); + mbedtls_platform_zeroize(add_input, sizeof(add_input)); + return ret; } #if !defined(MBEDTLS_DEPRECATED_REMOVED) -void mbedtls_ctr_drbg_update( mbedtls_ctr_drbg_context *ctx, - const unsigned char *additional, - size_t add_len ) +void mbedtls_ctr_drbg_update(mbedtls_ctr_drbg_context *ctx, + const unsigned char *additional, + size_t add_len) { /* MAX_INPUT would be more logical here, but we have to match * block_cipher_df()'s limits since we can't propagate errors */ - if( add_len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT ) + if (add_len > MBEDTLS_CTR_DRBG_MAX_SEED_INPUT) { add_len = MBEDTLS_CTR_DRBG_MAX_SEED_INPUT; - (void) mbedtls_ctr_drbg_update_ret( ctx, additional, add_len ); + } + (void) mbedtls_ctr_drbg_update_ret(ctx, additional, add_len); } #endif /* MBEDTLS_DEPRECATED_REMOVED */ @@ -351,66 +355,67 @@ void mbedtls_ctr_drbg_update( mbedtls_ctr_drbg_context *ctx, * and with output * ctx contains new_working_state */ -static int mbedtls_ctr_drbg_reseed_internal( mbedtls_ctr_drbg_context *ctx, - const unsigned char *additional, - size_t len, - size_t nonce_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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - 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 ); + 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 ); + 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 ) ) - { - return( MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED ); + if (0 != ctx->f_entropy(ctx->p_entropy, seed, ctx->entropy_len)) { + return MBEDTLS_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED; } seedlen += ctx->entropy_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 ); + 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 ); + if (additional != NULL && len != 0) { + memcpy(seed + seedlen, additional, len); seedlen += len; } /* Reduce to 384 bits. */ - if( ( ret = block_cipher_df( seed, seed, seedlen ) ) != 0 ) + if ((ret = block_cipher_df(seed, seed, seedlen)) != 0) { goto exit; + } /* Update state. */ - if( ( ret = ctr_drbg_update_internal( ctx, seed ) ) != 0 ) + if ((ret = ctr_drbg_update_internal(ctx, seed)) != 0) { goto exit; + } ctx->reseed_counter = 1; exit: - mbedtls_platform_zeroize( seed, sizeof( seed ) ); - return( ret ); + mbedtls_platform_zeroize(seed, sizeof(seed)); + return ret; } -int mbedtls_ctr_drbg_reseed( mbedtls_ctr_drbg_context *ctx, - const unsigned char *additional, size_t len ) +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 mbedtls_ctr_drbg_reseed_internal(ctx, additional, len, 0); } /* Return a "good" nonce length for CTR_DRBG. The chosen nonce length @@ -418,12 +423,13 @@ int mbedtls_ctr_drbg_reseed( mbedtls_ctr_drbg_context *ctx, * 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 ) +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 ); + 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) @@ -437,52 +443,51 @@ static size_t good_nonce_len( size_t entropy_len ) * and with outputs * ctx = initial_working_state */ -int mbedtls_ctr_drbg_seed( mbedtls_ctr_drbg_context *ctx, - int (*f_entropy)(void *, unsigned char *, size_t), - void *p_entropy, - const unsigned char *custom, - size_t len ) +int mbedtls_ctr_drbg_seed(mbedtls_ctr_drbg_context *ctx, + int (*f_entropy)(void *, unsigned char *, size_t), + void *p_entropy, + const unsigned char *custom, + size_t len) { 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 ); + memset(key, 0, MBEDTLS_CTR_DRBG_KEYSIZE); /* The mutex is initialized iff f_entropy is set. */ #if defined(MBEDTLS_THREADING_C) - mbedtls_mutex_init( &ctx->mutex ); + mbedtls_mutex_init(&ctx->mutex); #endif - mbedtls_aes_init( &ctx->aes_ctx ); + mbedtls_aes_init(&ctx->aes_ctx); ctx->f_entropy = f_entropy; ctx->p_entropy = p_entropy; - if( ctx->entropy_len == 0 ) + if (ctx->entropy_len == 0) { ctx->entropy_len = MBEDTLS_CTR_DRBG_ENTROPY_LEN; + } /* 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 ) ); + 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_aes_setkey_enc(&ctx->aes_ctx, key, + MBEDTLS_CTR_DRBG_KEYBITS)) != 0) { + return ret; } /* Do the initial seeding. */ - if( ( ret = mbedtls_ctr_drbg_reseed_internal( ctx, custom, len, - nonce_len ) ) != 0 ) - { - return( ret ); + if ((ret = mbedtls_ctr_drbg_reseed_internal(ctx, custom, len, + nonce_len)) != 0) { + return ret; } - return( 0 ); + return 0; } /* CTR_DRBG_Generate with derivation function (SP 800-90A §10.2.1.5.2) @@ -504,9 +509,9 @@ int mbedtls_ctr_drbg_seed( mbedtls_ctr_drbg_context *ctx, * returned_bits = output[:output_len] * ctx contains new_working_state */ -int mbedtls_ctr_drbg_random_with_add( void *p_rng, - unsigned char *output, size_t output_len, - const unsigned char *additional, size_t add_len ) +int mbedtls_ctr_drbg_random_with_add(void *p_rng, + unsigned char *output, size_t output_len, + const unsigned char *additional, size_t add_len) { int ret = 0; mbedtls_ctr_drbg_context *ctx = (mbedtls_ctr_drbg_context *) p_rng; @@ -516,159 +521,163 @@ int mbedtls_ctr_drbg_random_with_add( void *p_rng, int i; size_t use_len; - if( output_len > MBEDTLS_CTR_DRBG_MAX_REQUEST ) - return( MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG ); + if (output_len > MBEDTLS_CTR_DRBG_MAX_REQUEST) { + return MBEDTLS_ERR_CTR_DRBG_REQUEST_TOO_BIG; + } - if( add_len > MBEDTLS_CTR_DRBG_MAX_INPUT ) - return( MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG ); + if (add_len > MBEDTLS_CTR_DRBG_MAX_INPUT) { + return MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG; + } - memset( add_input, 0, MBEDTLS_CTR_DRBG_SEEDLEN ); + memset(add_input, 0, MBEDTLS_CTR_DRBG_SEEDLEN); - if( ctx->reseed_counter > ctx->reseed_interval || - ctx->prediction_resistance ) - { - if( ( ret = mbedtls_ctr_drbg_reseed( ctx, additional, add_len ) ) != 0 ) - { - return( ret ); + if (ctx->reseed_counter > ctx->reseed_interval || + ctx->prediction_resistance) { + if ((ret = mbedtls_ctr_drbg_reseed(ctx, additional, add_len)) != 0) { + return ret; } add_len = 0; } - if( add_len > 0 ) - { - if( ( ret = block_cipher_df( add_input, additional, add_len ) ) != 0 ) + if (add_len > 0) { + if ((ret = block_cipher_df(add_input, additional, add_len)) != 0) { goto exit; - if( ( ret = ctr_drbg_update_internal( ctx, add_input ) ) != 0 ) + } + if ((ret = ctr_drbg_update_internal(ctx, add_input)) != 0) { goto exit; + } } - while( output_len > 0 ) - { + while (output_len > 0) { /* * Increase counter */ - for( i = MBEDTLS_CTR_DRBG_BLOCKSIZE; i > 0; i-- ) - if( ++ctx->counter[i - 1] != 0 ) + for (i = MBEDTLS_CTR_DRBG_BLOCKSIZE; i > 0; i--) { + if (++ctx->counter[i - 1] != 0) { break; + } + } /* * 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 ) + use_len = (output_len > MBEDTLS_CTR_DRBG_BLOCKSIZE) ? MBEDTLS_CTR_DRBG_BLOCKSIZE : output_len; /* * Copy random block to destination */ - memcpy( p, tmp, use_len ); + memcpy(p, tmp, use_len); p += use_len; output_len -= use_len; } - if( ( ret = ctr_drbg_update_internal( ctx, add_input ) ) != 0 ) + if ((ret = ctr_drbg_update_internal(ctx, add_input)) != 0) { goto exit; + } ctx->reseed_counter++; exit: - mbedtls_platform_zeroize( add_input, sizeof( add_input ) ); - mbedtls_platform_zeroize( tmp, sizeof( tmp ) ); - return( ret ); + mbedtls_platform_zeroize(add_input, sizeof(add_input)); + mbedtls_platform_zeroize(tmp, sizeof(tmp)); + 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; mbedtls_ctr_drbg_context *ctx = (mbedtls_ctr_drbg_context *) p_rng; #if defined(MBEDTLS_THREADING_C) - if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 ) - return( ret ); + if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) { + return ret; + } #endif - ret = mbedtls_ctr_drbg_random_with_add( ctx, output, output_len, NULL, 0 ); + ret = mbedtls_ctr_drbg_random_with_add(ctx, output, output_len, NULL, 0); #if defined(MBEDTLS_THREADING_C) - if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 ) - return( MBEDTLS_ERR_THREADING_MUTEX_ERROR ); + if (mbedtls_mutex_unlock(&ctx->mutex) != 0) { + return MBEDTLS_ERR_THREADING_MUTEX_ERROR; + } #endif - return( ret ); + return ret; } #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; - unsigned char buf[ MBEDTLS_CTR_DRBG_MAX_INPUT ]; + unsigned char buf[MBEDTLS_CTR_DRBG_MAX_INPUT]; - if( ( f = fopen( path, "wb" ) ) == NULL ) - return( MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR ); + 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 - { + } else { ret = 0; } exit: - mbedtls_platform_zeroize( buf, sizeof( buf ) ); + mbedtls_platform_zeroize(buf, sizeof(buf)); - fclose( f ); - return( ret ); + fclose(f); + 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; size_t n; - unsigned char buf[ MBEDTLS_CTR_DRBG_MAX_INPUT ]; + unsigned char buf[MBEDTLS_CTR_DRBG_MAX_INPUT]; unsigned char c; - if( ( f = fopen( path, "rb" ) ) == NULL ) - return( MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR ); + if ((f = fopen(path, "rb")) == NULL) { + return MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR; + } - n = fread( buf, 1, sizeof( buf ), f ); - if( fread( &c, 1, 1, f ) != 0 ) - { + n = fread(buf, 1, sizeof(buf), f); + if (fread(&c, 1, 1, f) != 0) { ret = MBEDTLS_ERR_CTR_DRBG_INPUT_TOO_BIG; goto exit; } - if( n == 0 || ferror( f ) ) - { + if (n == 0 || ferror(f)) { ret = MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR; goto exit; } - fclose( f ); + fclose(f); f = NULL; - ret = mbedtls_ctr_drbg_update_ret( ctx, buf, n ); + ret = mbedtls_ctr_drbg_update_ret(ctx, buf, n); exit: - mbedtls_platform_zeroize( buf, sizeof( buf ) ); - if( f != NULL ) - fclose( f ); - if( ret != 0 ) - return( ret ); - return( mbedtls_ctr_drbg_write_seed_file( ctx, path ) ); + mbedtls_platform_zeroize(buf, sizeof(buf)); + if (f != NULL) { + fclose(f); + } + if (ret != 0) { + return ret; + } + return mbedtls_ctr_drbg_write_seed_file(ctx, path); } #endif /* MBEDTLS_FS_IO */ @@ -699,192 +708,197 @@ exit: #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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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 }; +{ 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, - size_t len ) +static int ctr_drbg_self_test_entropy(void *data, unsigned char *buf, + size_t len) { const unsigned char *p = data; - memcpy( buf, p + test_offset, len ); + memcpy(buf, p + test_offset, len); test_offset += len; - return( 0 ); + return 0; } -#define CHK( c ) if( (c) != 0 ) \ - { \ - if( verbose != 0 ) \ - mbedtls_printf( "failed\n" ); \ - return( 1 ); \ - } +#define CHK(c) if ((c) != 0) \ + { \ + if (verbose != 0) \ + mbedtls_printf("failed\n"); \ + return 1; \ + } #define SELF_TEST_OUTPUT_DISCARD_LENGTH 64 /* * Checkup routine */ -int mbedtls_ctr_drbg_self_test( int verbose ) +int mbedtls_ctr_drbg_self_test(int verbose) { mbedtls_ctr_drbg_context ctx; - unsigned char buf[ sizeof( result_pr ) ]; + unsigned char buf[sizeof(result_pr)]; - mbedtls_ctr_drbg_init( &ctx ); + mbedtls_ctr_drbg_init(&ctx); /* * Based on a NIST CTR_DRBG test vector (PR = True) */ - if( verbose != 0 ) - mbedtls_printf( " CTR_DRBG (PR = TRUE) : " ); + if (verbose != 0) { + mbedtls_printf(" CTR_DRBG (PR = TRUE) : "); + } test_offset = 0; - 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, - 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, SELF_TEST_OUTPUT_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 ); - - if( verbose != 0 ) - mbedtls_printf( "passed\n" ); + 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, + 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, SELF_TEST_OUTPUT_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); + + if (verbose != 0) { + mbedtls_printf("passed\n"); + } /* * Based on a NIST CTR_DRBG test vector (PR = FALSE) */ - if( verbose != 0 ) - mbedtls_printf( " CTR_DRBG (PR = FALSE): " ); + if (verbose != 0) { + mbedtls_printf(" CTR_DRBG (PR = FALSE): "); + } - mbedtls_ctr_drbg_init( &ctx ); + mbedtls_ctr_drbg_init(&ctx); test_offset = 0; - 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, - pers_nopr, MBEDTLS_CTR_DRBG_KEYSIZE ) ); - CHK( mbedtls_ctr_drbg_reseed( &ctx, NULL, 0 ) ); - CHK( mbedtls_ctr_drbg_random( &ctx, buf, SELF_TEST_OUTPUT_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 ); - - if( verbose != 0 ) - mbedtls_printf( "passed\n" ); - - if( verbose != 0 ) - mbedtls_printf( "\n" ); - - return( 0 ); + 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, + pers_nopr, MBEDTLS_CTR_DRBG_KEYSIZE)); + CHK(mbedtls_ctr_drbg_reseed(&ctx, NULL, 0)); + CHK(mbedtls_ctr_drbg_random(&ctx, buf, SELF_TEST_OUTPUT_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); + + if (verbose != 0) { + mbedtls_printf("passed\n"); + } + + if (verbose != 0) { + mbedtls_printf("\n"); + } + + return 0; } #endif /* MBEDTLS_SELF_TEST */ |