diff options
Diffstat (limited to 'thirdparty/mbedtls/library/entropy.c')
| -rw-r--r-- | thirdparty/mbedtls/library/entropy.c | 504 |
1 files changed, 269 insertions, 235 deletions
diff --git a/thirdparty/mbedtls/library/entropy.c b/thirdparty/mbedtls/library/entropy.c index e3b337ff35..af78acc1bf 100644 --- a/thirdparty/mbedtls/library/entropy.c +++ b/thirdparty/mbedtls/library/entropy.c @@ -48,103 +48,104 @@ #define ENTROPY_MAX_LOOP 256 /**< Maximum amount to loop before error */ -void mbedtls_entropy_init( mbedtls_entropy_context *ctx ) +void mbedtls_entropy_init(mbedtls_entropy_context *ctx) { ctx->source_count = 0; - memset( ctx->source, 0, sizeof( ctx->source ) ); + memset(ctx->source, 0, sizeof(ctx->source)); #if defined(MBEDTLS_THREADING_C) - mbedtls_mutex_init( &ctx->mutex ); + mbedtls_mutex_init(&ctx->mutex); #endif ctx->accumulator_started = 0; #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR) - mbedtls_sha512_init( &ctx->accumulator ); + mbedtls_sha512_init(&ctx->accumulator); #else - mbedtls_sha256_init( &ctx->accumulator ); + mbedtls_sha256_init(&ctx->accumulator); #endif #if defined(MBEDTLS_HAVEGE_C) - mbedtls_havege_init( &ctx->havege_data ); + mbedtls_havege_init(&ctx->havege_data); #endif /* Reminder: Update ENTROPY_HAVE_STRONG in the test files * when adding more strong entropy sources here. */ #if defined(MBEDTLS_TEST_NULL_ENTROPY) - mbedtls_entropy_add_source( ctx, mbedtls_null_entropy_poll, NULL, - 1, MBEDTLS_ENTROPY_SOURCE_STRONG ); + mbedtls_entropy_add_source(ctx, mbedtls_null_entropy_poll, NULL, + 1, MBEDTLS_ENTROPY_SOURCE_STRONG); #endif #if !defined(MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES) #if !defined(MBEDTLS_NO_PLATFORM_ENTROPY) - mbedtls_entropy_add_source( ctx, mbedtls_platform_entropy_poll, NULL, - MBEDTLS_ENTROPY_MIN_PLATFORM, - MBEDTLS_ENTROPY_SOURCE_STRONG ); + mbedtls_entropy_add_source(ctx, mbedtls_platform_entropy_poll, NULL, + MBEDTLS_ENTROPY_MIN_PLATFORM, + MBEDTLS_ENTROPY_SOURCE_STRONG); #endif #if defined(MBEDTLS_TIMING_C) - mbedtls_entropy_add_source( ctx, mbedtls_hardclock_poll, NULL, - MBEDTLS_ENTROPY_MIN_HARDCLOCK, - MBEDTLS_ENTROPY_SOURCE_WEAK ); + mbedtls_entropy_add_source(ctx, mbedtls_hardclock_poll, NULL, + MBEDTLS_ENTROPY_MIN_HARDCLOCK, + MBEDTLS_ENTROPY_SOURCE_WEAK); #endif #if defined(MBEDTLS_HAVEGE_C) - mbedtls_entropy_add_source( ctx, mbedtls_havege_poll, &ctx->havege_data, - MBEDTLS_ENTROPY_MIN_HAVEGE, - MBEDTLS_ENTROPY_SOURCE_STRONG ); + mbedtls_entropy_add_source(ctx, mbedtls_havege_poll, &ctx->havege_data, + MBEDTLS_ENTROPY_MIN_HAVEGE, + MBEDTLS_ENTROPY_SOURCE_STRONG); #endif #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT) - mbedtls_entropy_add_source( ctx, mbedtls_hardware_poll, NULL, - MBEDTLS_ENTROPY_MIN_HARDWARE, - MBEDTLS_ENTROPY_SOURCE_STRONG ); + mbedtls_entropy_add_source(ctx, mbedtls_hardware_poll, NULL, + MBEDTLS_ENTROPY_MIN_HARDWARE, + MBEDTLS_ENTROPY_SOURCE_STRONG); #endif #if defined(MBEDTLS_ENTROPY_NV_SEED) - mbedtls_entropy_add_source( ctx, mbedtls_nv_seed_poll, NULL, - MBEDTLS_ENTROPY_BLOCK_SIZE, - MBEDTLS_ENTROPY_SOURCE_STRONG ); + mbedtls_entropy_add_source(ctx, mbedtls_nv_seed_poll, NULL, + MBEDTLS_ENTROPY_BLOCK_SIZE, + MBEDTLS_ENTROPY_SOURCE_STRONG); ctx->initial_entropy_run = 0; #endif #endif /* MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES */ } -void mbedtls_entropy_free( mbedtls_entropy_context *ctx ) +void mbedtls_entropy_free(mbedtls_entropy_context *ctx) { /* If the context was already free, don't call free() again. * This is important for mutexes which don't allow double-free. */ - if( ctx->accumulator_started == -1 ) + if (ctx->accumulator_started == -1) { return; + } #if defined(MBEDTLS_HAVEGE_C) - mbedtls_havege_free( &ctx->havege_data ); + mbedtls_havege_free(&ctx->havege_data); #endif #if defined(MBEDTLS_THREADING_C) - mbedtls_mutex_free( &ctx->mutex ); + mbedtls_mutex_free(&ctx->mutex); #endif #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR) - mbedtls_sha512_free( &ctx->accumulator ); + mbedtls_sha512_free(&ctx->accumulator); #else - mbedtls_sha256_free( &ctx->accumulator ); + mbedtls_sha256_free(&ctx->accumulator); #endif #if defined(MBEDTLS_ENTROPY_NV_SEED) ctx->initial_entropy_run = 0; #endif ctx->source_count = 0; - mbedtls_platform_zeroize( ctx->source, sizeof( ctx->source ) ); + mbedtls_platform_zeroize(ctx->source, sizeof(ctx->source)); ctx->accumulator_started = -1; } -int mbedtls_entropy_add_source( mbedtls_entropy_context *ctx, - mbedtls_entropy_f_source_ptr f_source, void *p_source, - size_t threshold, int strong ) +int mbedtls_entropy_add_source(mbedtls_entropy_context *ctx, + mbedtls_entropy_f_source_ptr f_source, void *p_source, + size_t threshold, int strong) { int idx, ret = 0; #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 idx = ctx->source_count; - if( idx >= MBEDTLS_ENTROPY_MAX_SOURCES ) - { + if (idx >= MBEDTLS_ENTROPY_MAX_SOURCES) { ret = MBEDTLS_ERR_ENTROPY_MAX_SOURCES; goto exit; } @@ -158,18 +159,19 @@ int mbedtls_entropy_add_source( mbedtls_entropy_context *ctx, exit: #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; } /* * Entropy accumulator update */ -static int entropy_update( mbedtls_entropy_context *ctx, unsigned char source_id, - const unsigned char *data, size_t len ) +static int entropy_update(mbedtls_entropy_context *ctx, unsigned char source_id, + const unsigned char *data, size_t len) { unsigned char header[2]; unsigned char tmp[MBEDTLS_ENTROPY_BLOCK_SIZE]; @@ -177,14 +179,15 @@ static int entropy_update( mbedtls_entropy_context *ctx, unsigned char source_id const unsigned char *p = data; int ret = 0; - if( use_len > MBEDTLS_ENTROPY_BLOCK_SIZE ) - { + if (use_len > MBEDTLS_ENTROPY_BLOCK_SIZE) { #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR) - if( ( ret = mbedtls_sha512_ret( data, len, tmp, 0 ) ) != 0 ) + if ((ret = mbedtls_sha512_ret(data, len, tmp, 0)) != 0) { goto cleanup; + } #else - if( ( ret = mbedtls_sha256_ret( data, len, tmp, 0 ) ) != 0 ) + if ((ret = mbedtls_sha256_ret(data, len, tmp, 0)) != 0) { goto cleanup; + } #endif p = tmp; use_len = MBEDTLS_ENTROPY_BLOCK_SIZE; @@ -199,55 +202,61 @@ static int entropy_update( mbedtls_entropy_context *ctx, unsigned char source_id * gather entropy eventually execute this code. */ #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR) - if( ctx->accumulator_started == 0 && - ( ret = mbedtls_sha512_starts_ret( &ctx->accumulator, 0 ) ) != 0 ) + if (ctx->accumulator_started == 0 && + (ret = mbedtls_sha512_starts_ret(&ctx->accumulator, 0)) != 0) { goto cleanup; - else + } else { ctx->accumulator_started = 1; - if( ( ret = mbedtls_sha512_update_ret( &ctx->accumulator, header, 2 ) ) != 0 ) + } + if ((ret = mbedtls_sha512_update_ret(&ctx->accumulator, header, 2)) != 0) { goto cleanup; - ret = mbedtls_sha512_update_ret( &ctx->accumulator, p, use_len ); + } + ret = mbedtls_sha512_update_ret(&ctx->accumulator, p, use_len); #else - if( ctx->accumulator_started == 0 && - ( ret = mbedtls_sha256_starts_ret( &ctx->accumulator, 0 ) ) != 0 ) + if (ctx->accumulator_started == 0 && + (ret = mbedtls_sha256_starts_ret(&ctx->accumulator, 0)) != 0) { goto cleanup; - else + } else { ctx->accumulator_started = 1; - if( ( ret = mbedtls_sha256_update_ret( &ctx->accumulator, header, 2 ) ) != 0 ) + } + if ((ret = mbedtls_sha256_update_ret(&ctx->accumulator, header, 2)) != 0) { goto cleanup; - ret = mbedtls_sha256_update_ret( &ctx->accumulator, p, use_len ); + } + ret = mbedtls_sha256_update_ret(&ctx->accumulator, p, use_len); #endif cleanup: - mbedtls_platform_zeroize( tmp, sizeof( tmp ) ); + mbedtls_platform_zeroize(tmp, sizeof(tmp)); - return( ret ); + return ret; } -int mbedtls_entropy_update_manual( mbedtls_entropy_context *ctx, - const unsigned char *data, size_t len ) +int mbedtls_entropy_update_manual(mbedtls_entropy_context *ctx, + const unsigned char *data, size_t len) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; #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 = entropy_update( ctx, MBEDTLS_ENTROPY_SOURCE_MANUAL, data, len ); + ret = entropy_update(ctx, MBEDTLS_ENTROPY_SOURCE_MANUAL, data, len); #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; } /* * Run through the different sources to add entropy to our accumulator */ -static int entropy_gather_internal( mbedtls_entropy_context *ctx ) +static int entropy_gather_internal(mbedtls_entropy_context *ctx) { int ret = MBEDTLS_ERR_ENTROPY_SOURCE_FAILED; int i; @@ -255,121 +264,125 @@ static int entropy_gather_internal( mbedtls_entropy_context *ctx ) unsigned char buf[MBEDTLS_ENTROPY_MAX_GATHER]; size_t olen; - if( ctx->source_count == 0 ) - return( MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED ); + if (ctx->source_count == 0) { + return MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED; + } /* * Run through our entropy sources */ - for( i = 0; i < ctx->source_count; i++ ) - { - if( ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG ) + for (i = 0; i < ctx->source_count; i++) { + if (ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG) { have_one_strong = 1; + } olen = 0; - if( ( ret = ctx->source[i].f_source( ctx->source[i].p_source, - buf, MBEDTLS_ENTROPY_MAX_GATHER, &olen ) ) != 0 ) - { + if ((ret = ctx->source[i].f_source(ctx->source[i].p_source, + buf, MBEDTLS_ENTROPY_MAX_GATHER, &olen)) != 0) { goto cleanup; } /* * Add if we actually gathered something */ - if( olen > 0 ) - { - if( ( ret = entropy_update( ctx, (unsigned char) i, - buf, olen ) ) != 0 ) - return( ret ); + if (olen > 0) { + if ((ret = entropy_update(ctx, (unsigned char) i, + buf, olen)) != 0) { + return ret; + } ctx->source[i].size += olen; } } - if( have_one_strong == 0 ) + if (have_one_strong == 0) { ret = MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE; + } cleanup: - mbedtls_platform_zeroize( buf, sizeof( buf ) ); + mbedtls_platform_zeroize(buf, sizeof(buf)); - return( ret ); + return ret; } /* * Thread-safe wrapper for entropy_gather_internal() */ -int mbedtls_entropy_gather( mbedtls_entropy_context *ctx ) +int mbedtls_entropy_gather(mbedtls_entropy_context *ctx) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; #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 = entropy_gather_internal( ctx ); + ret = entropy_gather_internal(ctx); #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; } -int mbedtls_entropy_func( void *data, unsigned char *output, size_t len ) +int mbedtls_entropy_func(void *data, unsigned char *output, size_t len) { int ret, count = 0, i, thresholds_reached; size_t strong_size; mbedtls_entropy_context *ctx = (mbedtls_entropy_context *) data; unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE]; - if( len > MBEDTLS_ENTROPY_BLOCK_SIZE ) - return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED ); + if (len > MBEDTLS_ENTROPY_BLOCK_SIZE) { + return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED; + } #if defined(MBEDTLS_ENTROPY_NV_SEED) /* Update the NV entropy seed before generating any entropy for outside * use. */ - if( ctx->initial_entropy_run == 0 ) - { + if (ctx->initial_entropy_run == 0) { ctx->initial_entropy_run = 1; - if( ( ret = mbedtls_entropy_update_nv_seed( ctx ) ) != 0 ) - return( ret ); + if ((ret = mbedtls_entropy_update_nv_seed(ctx)) != 0) { + return ret; + } } #endif #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 /* * Always gather extra entropy before a call */ - do - { - if( count++ > ENTROPY_MAX_LOOP ) - { + do { + if (count++ > ENTROPY_MAX_LOOP) { ret = MBEDTLS_ERR_ENTROPY_SOURCE_FAILED; goto exit; } - if( ( ret = entropy_gather_internal( ctx ) ) != 0 ) + if ((ret = entropy_gather_internal(ctx)) != 0) { goto exit; + } thresholds_reached = 1; strong_size = 0; - for( i = 0; i < ctx->source_count; i++ ) - { - if( ctx->source[i].size < ctx->source[i].threshold ) + for (i = 0; i < ctx->source_count; i++) { + if (ctx->source[i].size < ctx->source[i].threshold) { thresholds_reached = 0; - if( ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG ) + } + if (ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG) { strong_size += ctx->source[i].size; + } } - } - while( ! thresholds_reached || strong_size < MBEDTLS_ENTROPY_BLOCK_SIZE ); + } while (!thresholds_reached || strong_size < MBEDTLS_ENTROPY_BLOCK_SIZE); - memset( buf, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); + memset(buf, 0, MBEDTLS_ENTROPY_BLOCK_SIZE); #if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR) /* @@ -377,109 +390,118 @@ int mbedtls_entropy_func( void *data, unsigned char *output, size_t len ) * in a previous call to entropy_update(). If this is not guaranteed, the * code below will fail. */ - if( ( ret = mbedtls_sha512_finish_ret( &ctx->accumulator, buf ) ) != 0 ) + if ((ret = mbedtls_sha512_finish_ret(&ctx->accumulator, buf)) != 0) { goto exit; + } /* * Reset accumulator and counters and recycle existing entropy */ - mbedtls_sha512_free( &ctx->accumulator ); - mbedtls_sha512_init( &ctx->accumulator ); - if( ( ret = mbedtls_sha512_starts_ret( &ctx->accumulator, 0 ) ) != 0 ) + mbedtls_sha512_free(&ctx->accumulator); + mbedtls_sha512_init(&ctx->accumulator); + if ((ret = mbedtls_sha512_starts_ret(&ctx->accumulator, 0)) != 0) { goto exit; - if( ( ret = mbedtls_sha512_update_ret( &ctx->accumulator, buf, - MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 ) + } + if ((ret = mbedtls_sha512_update_ret(&ctx->accumulator, buf, + MBEDTLS_ENTROPY_BLOCK_SIZE)) != 0) { goto exit; + } /* * Perform second SHA-512 on entropy */ - if( ( ret = mbedtls_sha512_ret( buf, MBEDTLS_ENTROPY_BLOCK_SIZE, - buf, 0 ) ) != 0 ) + if ((ret = mbedtls_sha512_ret(buf, MBEDTLS_ENTROPY_BLOCK_SIZE, + buf, 0)) != 0) { goto exit; + } #else /* MBEDTLS_ENTROPY_SHA512_ACCUMULATOR */ - if( ( ret = mbedtls_sha256_finish_ret( &ctx->accumulator, buf ) ) != 0 ) + if ((ret = mbedtls_sha256_finish_ret(&ctx->accumulator, buf)) != 0) { goto exit; + } /* * Reset accumulator and counters and recycle existing entropy */ - mbedtls_sha256_free( &ctx->accumulator ); - mbedtls_sha256_init( &ctx->accumulator ); - if( ( ret = mbedtls_sha256_starts_ret( &ctx->accumulator, 0 ) ) != 0 ) + mbedtls_sha256_free(&ctx->accumulator); + mbedtls_sha256_init(&ctx->accumulator); + if ((ret = mbedtls_sha256_starts_ret(&ctx->accumulator, 0)) != 0) { goto exit; - if( ( ret = mbedtls_sha256_update_ret( &ctx->accumulator, buf, - MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 ) + } + if ((ret = mbedtls_sha256_update_ret(&ctx->accumulator, buf, + MBEDTLS_ENTROPY_BLOCK_SIZE)) != 0) { goto exit; + } /* * Perform second SHA-256 on entropy */ - if( ( ret = mbedtls_sha256_ret( buf, MBEDTLS_ENTROPY_BLOCK_SIZE, - buf, 0 ) ) != 0 ) + if ((ret = mbedtls_sha256_ret(buf, MBEDTLS_ENTROPY_BLOCK_SIZE, + buf, 0)) != 0) { goto exit; + } #endif /* MBEDTLS_ENTROPY_SHA512_ACCUMULATOR */ - for( i = 0; i < ctx->source_count; i++ ) + for (i = 0; i < ctx->source_count; i++) { ctx->source[i].size = 0; + } - memcpy( output, buf, len ); + memcpy(output, buf, len); ret = 0; exit: - mbedtls_platform_zeroize( buf, sizeof( buf ) ); + mbedtls_platform_zeroize(buf, sizeof(buf)); #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_ENTROPY_NV_SEED) -int mbedtls_entropy_update_nv_seed( mbedtls_entropy_context *ctx ) +int mbedtls_entropy_update_nv_seed(mbedtls_entropy_context *ctx) { int ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR; unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE]; /* Read new seed and write it to NV */ - if( ( ret = mbedtls_entropy_func( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 ) - return( ret ); + if ((ret = mbedtls_entropy_func(ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE)) != 0) { + return ret; + } - if( mbedtls_nv_seed_write( buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) < 0 ) - return( MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR ); + if (mbedtls_nv_seed_write(buf, MBEDTLS_ENTROPY_BLOCK_SIZE) < 0) { + return MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR; + } /* Manually update the remaining stream with a separator value to diverge */ - memset( buf, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); - ret = mbedtls_entropy_update_manual( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ); + memset(buf, 0, MBEDTLS_ENTROPY_BLOCK_SIZE); + ret = mbedtls_entropy_update_manual(ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE); - return( ret ); + return ret; } #endif /* MBEDTLS_ENTROPY_NV_SEED */ #if defined(MBEDTLS_FS_IO) -int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *path ) +int mbedtls_entropy_write_seed_file(mbedtls_entropy_context *ctx, const char *path) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; FILE *f = NULL; unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE]; - if( ( ret = mbedtls_entropy_func( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 ) - { + if ((ret = mbedtls_entropy_func(ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE)) != 0) { ret = MBEDTLS_ERR_ENTROPY_SOURCE_FAILED; goto exit; } - if( ( f = fopen( path, "wb" ) ) == NULL ) - { + if ((f = fopen(path, "wb")) == NULL) { ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR; goto exit; } - if( fwrite( buf, 1, MBEDTLS_ENTROPY_BLOCK_SIZE, f ) != MBEDTLS_ENTROPY_BLOCK_SIZE ) - { + if (fwrite(buf, 1, MBEDTLS_ENTROPY_BLOCK_SIZE, f) != MBEDTLS_ENTROPY_BLOCK_SIZE) { ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR; goto exit; } @@ -487,44 +509,49 @@ int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *p ret = 0; exit: - mbedtls_platform_zeroize( buf, sizeof( buf ) ); + mbedtls_platform_zeroize(buf, sizeof(buf)); - if( f != NULL ) - fclose( f ); + if (f != NULL) { + fclose(f); + } - return( ret ); + return ret; } -int mbedtls_entropy_update_seed_file( mbedtls_entropy_context *ctx, const char *path ) +int mbedtls_entropy_update_seed_file(mbedtls_entropy_context *ctx, const char *path) { int ret = 0; FILE *f; size_t n; - unsigned char buf[ MBEDTLS_ENTROPY_MAX_SEED_SIZE ]; + unsigned char buf[MBEDTLS_ENTROPY_MAX_SEED_SIZE]; - if( ( f = fopen( path, "rb" ) ) == NULL ) - return( MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR ); + if ((f = fopen(path, "rb")) == NULL) { + return MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR; + } - fseek( f, 0, SEEK_END ); - n = (size_t) ftell( f ); - fseek( f, 0, SEEK_SET ); + fseek(f, 0, SEEK_END); + n = (size_t) ftell(f); + fseek(f, 0, SEEK_SET); - if( n > MBEDTLS_ENTROPY_MAX_SEED_SIZE ) + if (n > MBEDTLS_ENTROPY_MAX_SEED_SIZE) { n = MBEDTLS_ENTROPY_MAX_SEED_SIZE; + } - if( fread( buf, 1, n, f ) != n ) + if (fread(buf, 1, n, f) != n) { ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR; - else - ret = mbedtls_entropy_update_manual( ctx, buf, n ); + } else { + ret = mbedtls_entropy_update_manual(ctx, buf, n); + } - fclose( f ); + fclose(f); - mbedtls_platform_zeroize( buf, sizeof( buf ) ); + mbedtls_platform_zeroize(buf, sizeof(buf)); - if( ret != 0 ) - return( ret ); + if (ret != 0) { + return ret; + } - return( mbedtls_entropy_write_seed_file( ctx, path ) ); + return mbedtls_entropy_write_seed_file(ctx, path); } #endif /* MBEDTLS_FS_IO */ @@ -533,64 +560,62 @@ int mbedtls_entropy_update_seed_file( mbedtls_entropy_context *ctx, const char * /* * Dummy source function */ -static int entropy_dummy_source( void *data, unsigned char *output, - size_t len, size_t *olen ) +static int entropy_dummy_source(void *data, unsigned char *output, + size_t len, size_t *olen) { ((void) data); - memset( output, 0x2a, len ); + memset(output, 0x2a, len); *olen = len; - return( 0 ); + return 0; } #endif /* !MBEDTLS_TEST_NULL_ENTROPY */ #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT) -static int mbedtls_entropy_source_self_test_gather( unsigned char *buf, size_t buf_len ) +static int mbedtls_entropy_source_self_test_gather(unsigned char *buf, size_t buf_len) { int ret = 0; size_t entropy_len = 0; size_t olen = 0; size_t attempts = buf_len; - while( attempts > 0 && entropy_len < buf_len ) - { - if( ( ret = mbedtls_hardware_poll( NULL, buf + entropy_len, - buf_len - entropy_len, &olen ) ) != 0 ) - return( ret ); + while (attempts > 0 && entropy_len < buf_len) { + if ((ret = mbedtls_hardware_poll(NULL, buf + entropy_len, + buf_len - entropy_len, &olen)) != 0) { + return ret; + } entropy_len += olen; attempts--; } - if( entropy_len < buf_len ) - { + if (entropy_len < buf_len) { ret = 1; } - return( ret ); + return ret; } -static int mbedtls_entropy_source_self_test_check_bits( const unsigned char *buf, - size_t buf_len ) +static int mbedtls_entropy_source_self_test_check_bits(const unsigned char *buf, + size_t buf_len) { - unsigned char set= 0xFF; + unsigned char set = 0xFF; unsigned char unset = 0x00; size_t i; - for( i = 0; i < buf_len; i++ ) - { + for (i = 0; i < buf_len; i++) { set &= buf[i]; unset |= buf[i]; } - return( set == 0xFF || unset == 0x00 ); + return set == 0xFF || unset == 0x00; } /* - * A test to ensure hat the entropy sources are functioning correctly + * A test to ensure that the entropy sources are functioning correctly * and there is no obvious failure. The test performs the following checks: * - The entropy source is not providing only 0s (all bits unset) or 1s (all * bits set). @@ -600,45 +625,50 @@ static int mbedtls_entropy_source_self_test_check_bits( const unsigned char *buf * are not equal. * - The error code returned by the entropy source is not an error. */ -int mbedtls_entropy_source_self_test( int verbose ) +int mbedtls_entropy_source_self_test(int verbose) { int ret = 0; - unsigned char buf0[2 * sizeof( unsigned long long int )]; - unsigned char buf1[2 * sizeof( unsigned long long int )]; + unsigned char buf0[2 * sizeof(unsigned long long int)]; + unsigned char buf1[2 * sizeof(unsigned long long int)]; - if( verbose != 0 ) - mbedtls_printf( " ENTROPY_BIAS test: " ); + if (verbose != 0) { + mbedtls_printf(" ENTROPY_BIAS test: "); + } - memset( buf0, 0x00, sizeof( buf0 ) ); - memset( buf1, 0x00, sizeof( buf1 ) ); + memset(buf0, 0x00, sizeof(buf0)); + memset(buf1, 0x00, sizeof(buf1)); - if( ( ret = mbedtls_entropy_source_self_test_gather( buf0, sizeof( buf0 ) ) ) != 0 ) + if ((ret = mbedtls_entropy_source_self_test_gather(buf0, sizeof(buf0))) != 0) { goto cleanup; - if( ( ret = mbedtls_entropy_source_self_test_gather( buf1, sizeof( buf1 ) ) ) != 0 ) + } + if ((ret = mbedtls_entropy_source_self_test_gather(buf1, sizeof(buf1))) != 0) { goto cleanup; + } /* Make sure that the returned values are not all 0 or 1 */ - if( ( ret = mbedtls_entropy_source_self_test_check_bits( buf0, sizeof( buf0 ) ) ) != 0 ) + if ((ret = mbedtls_entropy_source_self_test_check_bits(buf0, sizeof(buf0))) != 0) { goto cleanup; - if( ( ret = mbedtls_entropy_source_self_test_check_bits( buf1, sizeof( buf1 ) ) ) != 0 ) + } + if ((ret = mbedtls_entropy_source_self_test_check_bits(buf1, sizeof(buf1))) != 0) { goto cleanup; + } /* Make sure that the entropy source is not returning values in a * pattern */ - ret = memcmp( buf0, buf1, sizeof( buf0 ) ) == 0; + ret = memcmp(buf0, buf1, sizeof(buf0)) == 0; cleanup: - if( verbose != 0 ) - { - if( ret != 0 ) - mbedtls_printf( "failed\n" ); - else - mbedtls_printf( "passed\n" ); + if (verbose != 0) { + if (ret != 0) { + mbedtls_printf("failed\n"); + } else { + mbedtls_printf("passed\n"); + } - mbedtls_printf( "\n" ); + mbedtls_printf("\n"); } - return( ret != 0 ); + return ret != 0; } #endif /* MBEDTLS_ENTROPY_HARDWARE_ALT */ @@ -648,7 +678,7 @@ cleanup: * test that the functions don't cause errors and write the correct * amount of data to buffers. */ -int mbedtls_entropy_self_test( int verbose ) +int mbedtls_entropy_self_test(int verbose) { int ret = 1; #if !defined(MBEDTLS_TEST_NULL_ENTROPY) @@ -658,23 +688,27 @@ int mbedtls_entropy_self_test( int verbose ) size_t i, j; #endif /* !MBEDTLS_TEST_NULL_ENTROPY */ - if( verbose != 0 ) - mbedtls_printf( " ENTROPY test: " ); + if (verbose != 0) { + mbedtls_printf(" ENTROPY test: "); + } #if !defined(MBEDTLS_TEST_NULL_ENTROPY) - mbedtls_entropy_init( &ctx ); + mbedtls_entropy_init(&ctx); /* First do a gather to make sure we have default sources */ - if( ( ret = mbedtls_entropy_gather( &ctx ) ) != 0 ) + if ((ret = mbedtls_entropy_gather(&ctx)) != 0) { goto cleanup; + } - ret = mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL, 16, - MBEDTLS_ENTROPY_SOURCE_WEAK ); - if( ret != 0 ) + ret = mbedtls_entropy_add_source(&ctx, entropy_dummy_source, NULL, 16, + MBEDTLS_ENTROPY_SOURCE_WEAK); + if (ret != 0) { goto cleanup; + } - if( ( ret = mbedtls_entropy_update_manual( &ctx, buf, sizeof buf ) ) != 0 ) + if ((ret = mbedtls_entropy_update_manual(&ctx, buf, sizeof(buf))) != 0) { goto cleanup; + } /* * To test that mbedtls_entropy_func writes correct number of bytes: @@ -684,44 +718,44 @@ int mbedtls_entropy_self_test( int verbose ) * each of the 32 or 64 bytes to be non-zero has a false failure rate * of at most 2^(-58) which is acceptable. */ - for( i = 0; i < 8; i++ ) - { - if( ( ret = mbedtls_entropy_func( &ctx, buf, sizeof( buf ) ) ) != 0 ) + for (i = 0; i < 8; i++) { + if ((ret = mbedtls_entropy_func(&ctx, buf, sizeof(buf))) != 0) { goto cleanup; + } - for( j = 0; j < sizeof( buf ); j++ ) + for (j = 0; j < sizeof(buf); j++) { acc[j] |= buf[j]; + } } - for( j = 0; j < sizeof( buf ); j++ ) - { - if( acc[j] == 0 ) - { + for (j = 0; j < sizeof(buf); j++) { + if (acc[j] == 0) { ret = 1; goto cleanup; } } #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT) - if( ( ret = mbedtls_entropy_source_self_test( 0 ) ) != 0 ) + if ((ret = mbedtls_entropy_source_self_test(0)) != 0) { goto cleanup; + } #endif cleanup: - mbedtls_entropy_free( &ctx ); + mbedtls_entropy_free(&ctx); #endif /* !MBEDTLS_TEST_NULL_ENTROPY */ - if( verbose != 0 ) - { - if( ret != 0 ) - mbedtls_printf( "failed\n" ); - else - mbedtls_printf( "passed\n" ); + if (verbose != 0) { + if (ret != 0) { + mbedtls_printf("failed\n"); + } else { + mbedtls_printf("passed\n"); + } - mbedtls_printf( "\n" ); + mbedtls_printf("\n"); } - return( ret != 0 ); + return ret != 0; } #endif /* MBEDTLS_SELF_TEST */ |