diff options
Diffstat (limited to 'FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/random.c')
| -rw-r--r-- | FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/random.c | 2487 |
1 files changed, 1850 insertions, 637 deletions
diff --git a/FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/random.c b/FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/random.c index 4a1f7ea5b..53041d164 100644 --- a/FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/random.c +++ b/FreeRTOS-Plus/Source/WolfSSL/wolfcrypt/src/random.c @@ -1,8 +1,8 @@ /* random.c * - * Copyright (C) 2006-2015 wolfSSL Inc. + * Copyright (C) 2006-2020 wolfSSL Inc. * - * This file is part of wolfSSL. (formerly known as CyaSSL) + * This file is part of wolfSSL. * * wolfSSL is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -16,135 +16,247 @@ * * 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 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA */ + #ifdef HAVE_CONFIG_H #include <config.h> #endif - + #include <wolfssl/wolfcrypt/settings.h> +#include <wolfssl/wolfcrypt/error-crypt.h> /* on HPUX 11 you may need to install /dev/random see http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=KRNG11I */ +#if defined(HAVE_FIPS) && \ + defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2) + + /* set NO_WRAPPERS before headers, use direct internal f()s not wrappers */ + #define FIPS_NO_WRAPPERS + + #ifdef USE_WINDOWS_API + #pragma code_seg(".fipsA$c") + #pragma const_seg(".fipsB$c") + #endif +#endif + + #include <wolfssl/wolfcrypt/random.h> +#include <wolfssl/wolfcrypt/cpuid.h> + + +/* If building for old FIPS. */ +#if defined(HAVE_FIPS) && \ + (!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2)) -#ifdef HAVE_FIPS int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz) { return GenerateSeed(os, seed, sz); } -#ifdef HAVE_CAVIUM - int wc_InitRngCavium(RNG* rng, int i) - { - return InitRngCavium(rng, i); - } -#endif - +int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId) +{ + (void)heap; + (void)devId; + return InitRng_fips(rng); +} -int wc_InitRng(RNG* rng) +int wc_InitRng(WC_RNG* rng) { return InitRng_fips(rng); } -int wc_RNG_GenerateBlock(RNG* rng, byte* b, word32 sz) +int wc_RNG_GenerateBlock(WC_RNG* rng, byte* b, word32 sz) { return RNG_GenerateBlock_fips(rng, b, sz); } -int wc_RNG_GenerateByte(RNG* rng, byte* b) +int wc_RNG_GenerateByte(WC_RNG* rng, byte* b) { return RNG_GenerateByte(rng, b); } -#if defined(HAVE_HASHDRBG) || defined(NO_RC4) +#ifdef HAVE_HASHDRBG - int wc_FreeRng(RNG* rng) + int wc_FreeRng(WC_RNG* rng) { return FreeRng_fips(rng); } - - int wc_RNG_HealthTest(int reseed, - const byte* entropyA, word32 entropyASz, - const byte* entropyB, word32 entropyBSz, - byte* output, word32 outputSz) + int wc_RNG_HealthTest(int reseed, const byte* seedA, word32 seedASz, + const byte* seedB, word32 seedBSz, + byte* output, word32 outputSz) { - return RNG_HealthTest_fips(reseed, entropyA, entropyASz, - entropyB, entropyBSz, output, outputSz); - } -#endif /* HAVE_HASHDRBG || NO_RC4 */ -#else /* else build without fips */ -#include <wolfssl/wolfcrypt/error-crypt.h> + return RNG_HealthTest_fips(reseed, seedA, seedASz, + seedB, seedBSz, output, outputSz); + } +#endif /* HAVE_HASHDRBG */ -#if defined(HAVE_HASHDRBG) || defined(NO_RC4) +#else /* else build without fips, or for new fips */ - #include <wolfssl/wolfcrypt/sha256.h> +#ifndef WC_NO_RNG /* if not FIPS and RNG is disabled then do not compile */ - #ifdef NO_INLINE - #include <wolfssl/wolfcrypt/misc.h> - #else - #include <wolfcrypt/src/misc.c> - #endif -#endif /* HAVE_HASHDRBG || NO_RC4 */ +#include <wolfssl/wolfcrypt/sha256.h> + +#ifdef WOLF_CRYPTO_CB + #include <wolfssl/wolfcrypt/cryptocb.h> +#endif + +#ifdef NO_INLINE + #include <wolfssl/wolfcrypt/misc.h> +#else + #define WOLFSSL_MISC_INCLUDED + #include <wolfcrypt/src/misc.c> +#endif -#if defined(USE_WINDOWS_API) +#if defined(WOLFSSL_SGX) + #include <sgx_trts.h> +#elif defined(USE_WINDOWS_API) #ifndef _WIN32_WINNT #define _WIN32_WINNT 0x0400 #endif #include <windows.h> #include <wincrypt.h> +#elif defined(HAVE_WNR) + #include <wnr.h> + #include <wolfssl/wolfcrypt/logging.h> + wolfSSL_Mutex wnr_mutex; /* global netRandom mutex */ + int wnr_timeout = 0; /* entropy timeout, mililseconds */ + int wnr_mutex_init = 0; /* flag for mutex init */ + wnr_context* wnr_ctx; /* global netRandom context */ +#elif defined(FREESCALE_KSDK_2_0_TRNG) + #include "fsl_trng.h" +#elif defined(FREESCALE_KSDK_2_0_RNGA) + #include "fsl_rnga.h" +#elif defined(WOLFSSL_WICED) + #include "wiced_crypto.h" +#elif defined(WOLFSSL_NETBURNER) + #include <predef.h> + #include <basictypes.h> + #include <random.h> +#elif defined(NO_DEV_RANDOM) +#elif defined(CUSTOM_RAND_GENERATE) +#elif defined(CUSTOM_RAND_GENERATE_BLOCK) +#elif defined(CUSTOM_RAND_GENERATE_SEED) +#elif defined(WOLFSSL_GENSEED_FORTEST) +#elif defined(WOLFSSL_MDK_ARM) +#elif defined(WOLFSSL_IAR_ARM) +#elif defined(WOLFSSL_ROWLEY_ARM) +#elif defined(WOLFSSL_EMBOS) +#elif defined(WOLFSSL_DEOS) +#elif defined(MICRIUM) +#elif defined(WOLFSSL_NUCLEUS) +#elif defined(WOLFSSL_PB) +#elif defined(WOLFSSL_ZEPHYR) +#elif defined(WOLFSSL_TELIT_M2MB) +#elif defined(WOLFSSL_SCE) && !defined(WOLFSSL_SCE_NO_TRNG) #else - #if !defined(NO_DEV_RANDOM) && !defined(CUSTOM_RAND_GENERATE) && \ - !defined(WOLFSSL_MDK_ARM) && !defined(WOLFSSL_IAR_ARM) - #include <fcntl.h> - #ifndef EBSNET - #include <unistd.h> - #endif - #else - /* include headers that may be needed to get good seed */ + /* include headers that may be needed to get good seed */ + #include <fcntl.h> + #ifndef EBSNET + #include <unistd.h> + #endif +#endif + + +#if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED) + static word32 intel_flags = 0; + static void wc_InitRng_IntelRD(void) + { + intel_flags = cpuid_get_flags(); + } + #ifdef HAVE_INTEL_RDSEED + static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz); #endif + #ifdef HAVE_INTEL_RDRAND + static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz); + #endif + +#ifdef USE_WINDOWS_API + #include <immintrin.h> #endif /* USE_WINDOWS_API */ - -#ifdef HAVE_INTEL_RDGEN - static int wc_InitRng_IntelRD(void) ; - #if defined(HAVE_HASHDRBG) || defined(NO_RC4) - static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz) ; +#endif + +/* Start NIST DRBG code */ +#ifdef HAVE_HASHDRBG + +#define OUTPUT_BLOCK_LEN (WC_SHA256_DIGEST_SIZE) +#define MAX_REQUEST_LEN (0x10000) +#define RESEED_INTERVAL WC_RESEED_INTERVAL + + +/* For FIPS builds, the user should not be adjusting the values. */ +#if defined(HAVE_FIPS) && \ + defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2) + #if defined(RNG_SECURITY_STRENGTH) \ + || defined(ENTROPY_SCALE_FACTOR) \ + || defined(SEED_BLOCK_SZ) + + #error "Do not change the RNG parameters for FIPS builds." + #endif +#endif + + +/* The security strength for the RNG is the target number of bits of + * entropy you are looking for in a seed. */ +#ifndef RNG_SECURITY_STRENGTH + #if defined(HAVE_FIPS) && \ + defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2) + /* SHA-256 requires a minimum of 256-bits of entropy. The goal + * of 1024 will provide 4 times that. */ + #define RNG_SECURITY_STRENGTH (1024) #else - static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz) ; + /* If not using FIPS or using old FIPS, set the number down a bit. + * More is better, but more is also slower. */ + #define RNG_SECURITY_STRENGTH (256) #endif - static word32 cpuid_check = 0 ; - static word32 cpuid_flags = 0 ; - #define CPUID_RDRAND 0x4 - #define CPUID_RDSEED 0x8 - #define IS_INTEL_RDRAND (cpuid_flags&CPUID_RDRAND) - #define IS_INTEL_RDSEED (cpuid_flags&CPUID_RDSEED) #endif -#if defined(HAVE_HASHDRBG) || defined(NO_RC4) +#ifndef ENTROPY_SCALE_FACTOR + /* The entropy scale factor should be the whole number inverse of the + * minimum bits of entropy per bit of NDRNG output. */ + #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND) + /* The value of 2 applies to Intel's RDSEED which provides about + * 0.5 bits minimum of entropy per bit. */ + #define ENTROPY_SCALE_FACTOR 2 + #else + /* Setting the default to 1. */ + #define ENTROPY_SCALE_FACTOR 1 + #endif +#endif -/* Start NIST DRBG code */ +#ifndef SEED_BLOCK_SZ + /* The seed block size, is the size of the output of the underlying NDRNG. + * This value is used for testing the output of the NDRNG. */ + #if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND) + /* RDSEED outputs in blocks of 64-bits. */ + #define SEED_BLOCK_SZ sizeof(word64) + #else + /* Setting the default to 4. */ + #define SEED_BLOCK_SZ 4 + #endif +#endif + +#define SEED_SZ (RNG_SECURITY_STRENGTH*ENTROPY_SCALE_FACTOR/8) + +/* The maximum seed size will be the seed size plus a seed block for the + * test, and an additional half of the seed size. This additional half + * is in case the user does not supply a nonce. A nonce will be obtained + * from the NDRNG. */ +#define MAX_SEED_SZ (SEED_SZ + SEED_SZ/2 + SEED_BLOCK_SZ) -#define OUTPUT_BLOCK_LEN (SHA256_DIGEST_SIZE) -#define MAX_REQUEST_LEN (0x10000) -#define RESEED_INTERVAL (1000000) -#define SECURITY_STRENGTH (256) -#define ENTROPY_SZ (SECURITY_STRENGTH/8) -#define NONCE_SZ (ENTROPY_SZ/2) -#define ENTROPY_NONCE_SZ (ENTROPY_SZ+NONCE_SZ) /* Internal return codes */ #define DRBG_SUCCESS 0 -#define DRBG_ERROR 1 -#define DRBG_FAILURE 2 -#define DRBG_NEED_RESEED 3 -#define DRBG_CONT_FAILURE 4 +#define DRBG_FAILURE 1 +#define DRBG_NEED_RESEED 2 +#define DRBG_CONT_FAILURE 3 /* RNG health states */ #define DRBG_NOT_INIT 0 @@ -152,6 +264,12 @@ int wc_RNG_GenerateByte(RNG* rng, byte* b) #define DRBG_FAILED 2 #define DRBG_CONT_FAILED 3 +#define RNG_HEALTH_TEST_CHECK_SIZE (WC_SHA256_DIGEST_SIZE * 4) + +/* Verify max gen block len */ +#if RNG_MAX_BLOCK_LEN > MAX_REQUEST_LEN + #error RNG_MAX_BLOCK_LEN is larger than NIST DBRG max request length +#endif enum { drbgInitC = 0, @@ -161,13 +279,20 @@ enum { drbgInitV }; - +/* NOTE: if DRBG struct is changed please update random.h drbg_data size */ typedef struct DRBG { word32 reseedCtr; word32 lastBlock; byte V[DRBG_SEED_LEN]; byte C[DRBG_SEED_LEN]; +#if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB) + void* heap; + int devId; +#endif byte matchCount; +#ifdef WOLFSSL_SMALL_STACK_CACHE + wc_Sha256 sha256; +#endif } DRBG; @@ -179,73 +304,104 @@ static int Hash_df(DRBG* drbg, byte* out, word32 outSz, byte type, const byte* inA, word32 inASz, const byte* inB, word32 inBSz) { + int ret = DRBG_FAILURE; byte ctr; int i; int len; word32 bits = (outSz * 8); /* reverse byte order */ - Sha256 sha; - byte digest[SHA256_DIGEST_SIZE]; +#ifdef WOLFSSL_SMALL_STACK_CACHE + wc_Sha256* sha = &drbg->sha256; +#else + wc_Sha256 sha[1]; +#endif +#ifdef WC_ASYNC_ENABLE_SHA256 + DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap); + if (digest == NULL) + return MEMORY_E; +#else + byte digest[WC_SHA256_DIGEST_SIZE]; +#endif (void)drbg; - #ifdef LITTLE_ENDIAN_ORDER - bits = ByteReverseWord32(bits); - #endif +#ifdef WC_ASYNC_ENABLE_SHA256 + if (digest == NULL) + return DRBG_FAILURE; +#endif + +#ifdef LITTLE_ENDIAN_ORDER + bits = ByteReverseWord32(bits); +#endif len = (outSz / OUTPUT_BLOCK_LEN) + ((outSz % OUTPUT_BLOCK_LEN) ? 1 : 0); - for (i = 0, ctr = 1; i < len; i++, ctr++) - { - if (wc_InitSha256(&sha) != 0) - return DRBG_FAILURE; - - if (wc_Sha256Update(&sha, &ctr, sizeof(ctr)) != 0) - return DRBG_FAILURE; - - if (wc_Sha256Update(&sha, (byte*)&bits, sizeof(bits)) != 0) - return DRBG_FAILURE; - - /* churning V is the only string that doesn't have the type added */ - if (type != drbgInitV) - if (wc_Sha256Update(&sha, &type, sizeof(type)) != 0) - return DRBG_FAILURE; - - if (wc_Sha256Update(&sha, inA, inASz) != 0) - return DRBG_FAILURE; - - if (inB != NULL && inBSz > 0) - if (wc_Sha256Update(&sha, inB, inBSz) != 0) - return DRBG_FAILURE; + for (i = 0, ctr = 1; i < len; i++, ctr++) { +#ifndef WOLFSSL_SMALL_STACK_CACHE + #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB) + ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId); + #else + ret = wc_InitSha256(sha); + #endif + if (ret != 0) + break; - if (wc_Sha256Final(&sha, digest) != 0) - return DRBG_FAILURE; + if (ret == 0) +#endif + ret = wc_Sha256Update(sha, &ctr, sizeof(ctr)); + if (ret == 0) + ret = wc_Sha256Update(sha, (byte*)&bits, sizeof(bits)); - if (outSz > OUTPUT_BLOCK_LEN) { - XMEMCPY(out, digest, OUTPUT_BLOCK_LEN); - outSz -= OUTPUT_BLOCK_LEN; - out += OUTPUT_BLOCK_LEN; + if (ret == 0) { + /* churning V is the only string that doesn't have the type added */ + if (type != drbgInitV) + ret = wc_Sha256Update(sha, &type, sizeof(type)); } - else { - XMEMCPY(out, digest, outSz); + if (ret == 0) + ret = wc_Sha256Update(sha, inA, inASz); + if (ret == 0) { + if (inB != NULL && inBSz > 0) + ret = wc_Sha256Update(sha, inB, inBSz); + } + if (ret == 0) + ret = wc_Sha256Final(sha, digest); + +#ifndef WOLFSSL_SMALL_STACK_CACHE + wc_Sha256Free(sha); +#endif + if (ret == 0) { + if (outSz > OUTPUT_BLOCK_LEN) { + XMEMCPY(out, digest, OUTPUT_BLOCK_LEN); + outSz -= OUTPUT_BLOCK_LEN; + out += OUTPUT_BLOCK_LEN; + } + else { + XMEMCPY(out, digest, outSz); + } } } - ForceZero(digest, sizeof(digest)); - return DRBG_SUCCESS; -} + ForceZero(digest, WC_SHA256_DIGEST_SIZE); +#ifdef WC_ASYNC_ENABLE_SHA256 + FREE_VAR(digest, drbg->heap); +#endif + + return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE; +} /* Returns: DRBG_SUCCESS or DRBG_FAILURE */ -static int Hash_DRBG_Reseed(DRBG* drbg, const byte* entropy, word32 entropySz) +static int Hash_DRBG_Reseed(DRBG* drbg, const byte* seed, word32 seedSz) { - byte seed[DRBG_SEED_LEN]; + byte newV[DRBG_SEED_LEN]; - if (Hash_df(drbg, seed, sizeof(seed), drbgReseed, drbg->V, sizeof(drbg->V), - entropy, entropySz) != DRBG_SUCCESS) { + XMEMSET(newV, 0, DRBG_SEED_LEN); + + if (Hash_df(drbg, newV, sizeof(newV), drbgReseed, + drbg->V, sizeof(drbg->V), seed, seedSz) != DRBG_SUCCESS) { return DRBG_FAILURE; } - XMEMCPY(drbg->V, seed, sizeof(drbg->V)); - ForceZero(seed, sizeof(seed)); + XMEMCPY(drbg->V, newV, sizeof(drbg->V)); + ForceZero(newV, sizeof(newV)); if (Hash_df(drbg, drbg->C, sizeof(drbg->C), drbgInitC, drbg->V, sizeof(drbg->V), NULL, 0) != DRBG_SUCCESS) { @@ -258,7 +414,17 @@ static int Hash_DRBG_Reseed(DRBG* drbg, const byte* entropy, word32 entropySz) return DRBG_SUCCESS; } -static INLINE void array_add_one(byte* data, word32 dataSz) +/* Returns: DRBG_SUCCESS and DRBG_FAILURE or BAD_FUNC_ARG on fail */ +int wc_RNG_DRBG_Reseed(WC_RNG* rng, const byte* seed, word32 seedSz) +{ + if (rng == NULL || seed == NULL) { + return BAD_FUNC_ARG; + } + + return Hash_DRBG_Reseed(rng->drbg, seed, seedSz); +} + +static WC_INLINE void array_add_one(byte* data, word32 dataSz) { int i; @@ -269,16 +435,26 @@ static INLINE void array_add_one(byte* data, word32 dataSz) } } - /* Returns: DRBG_SUCCESS or DRBG_FAILURE */ static int Hash_gen(DRBG* drbg, byte* out, word32 outSz, const byte* V) { + int ret = DRBG_FAILURE; byte data[DRBG_SEED_LEN]; int i; int len; word32 checkBlock; - Sha256 sha; - byte digest[SHA256_DIGEST_SIZE]; +#ifdef WOLFSSL_SMALL_STACK_CACHE + wc_Sha256* sha = &drbg->sha256; +#else + wc_Sha256 sha[1]; +#endif +#ifdef WC_ASYNC_ENABLE_SHA256 + DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap); + if (digest == NULL) + return MEMORY_E; +#else + byte digest[WC_SHA256_DIGEST_SIZE]; +#endif /* Special case: outSz is 0 and out is NULL. wc_Generate a block to save for * the continuous test. */ @@ -289,48 +465,63 @@ static int Hash_gen(DRBG* drbg, byte* out, word32 outSz, const byte* V) XMEMCPY(data, V, sizeof(data)); for (i = 0; i < len; i++) { - if (wc_InitSha256(&sha) != 0 || - wc_Sha256Update(&sha, data, sizeof(data)) != 0 || - wc_Sha256Final(&sha, digest) != 0) { - - return DRBG_FAILURE; - } +#ifndef WOLFSSL_SMALL_STACK_CACHE + #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB) + ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId); + #else + ret = wc_InitSha256(sha); + #endif + if (ret == 0) +#endif + ret = wc_Sha256Update(sha, data, sizeof(data)); + if (ret == 0) + ret = wc_Sha256Final(sha, digest); +#ifndef WOLFSSL_SMALL_STACK_CACHE + wc_Sha256Free(sha); +#endif - XMEMCPY(&checkBlock, digest, sizeof(word32)); - if (drbg->reseedCtr > 1 && checkBlock == drbg->lastBlock) { - if (drbg->matchCount == 1) { - return DRBG_CONT_FAILURE; + if (ret == 0) { + XMEMCPY(&checkBlock, digest, sizeof(word32)); + if (drbg->reseedCtr > 1 && checkBlock == drbg->lastBlock) { + if (drbg->matchCount == 1) { + return DRBG_CONT_FAILURE; + } + else { + if (i == len) { + len++; + } + drbg->matchCount = 1; + } } else { - if (i == len) { - len++; - } - drbg->matchCount = 1; + drbg->matchCount = 0; + drbg->lastBlock = checkBlock; } - } - else { - drbg->matchCount = 0; - drbg->lastBlock = checkBlock; - } - if (outSz >= OUTPUT_BLOCK_LEN) { - XMEMCPY(out, digest, OUTPUT_BLOCK_LEN); - outSz -= OUTPUT_BLOCK_LEN; - out += OUTPUT_BLOCK_LEN; - array_add_one(data, DRBG_SEED_LEN); - } - else if (out != NULL && outSz != 0) { - XMEMCPY(out, digest, outSz); - outSz = 0; + if (out != NULL && outSz != 0) { + if (outSz >= OUTPUT_BLOCK_LEN) { + XMEMCPY(out, digest, OUTPUT_BLOCK_LEN); + outSz -= OUTPUT_BLOCK_LEN; + out += OUTPUT_BLOCK_LEN; + array_add_one(data, DRBG_SEED_LEN); + } + else { + XMEMCPY(out, digest, outSz); + outSz = 0; + } + } } } ForceZero(data, sizeof(data)); - return DRBG_SUCCESS; -} +#ifdef WC_ASYNC_ENABLE_SHA256 + FREE_VAR(digest, drbg->heap); +#endif + return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE; +} -static INLINE void array_add(byte* d, word32 dLen, const byte* s, word32 sLen) +static WC_INLINE void array_add(byte* d, word32 dLen, const byte* s, word32 sLen) { word16 carry = 0; @@ -352,53 +543,97 @@ static INLINE void array_add(byte* d, word32 dLen, const byte* s, word32 sLen) } } - /* Returns: DRBG_SUCCESS, DRBG_NEED_RESEED, or DRBG_FAILURE */ static int Hash_DRBG_Generate(DRBG* drbg, byte* out, word32 outSz) { - int ret = DRBG_NEED_RESEED; - Sha256 sha; - byte digest[SHA256_DIGEST_SIZE]; + int ret; +#ifdef WOLFSSL_SMALL_STACK_CACHE + wc_Sha256* sha = &drbg->sha256; +#else + wc_Sha256 sha[1]; +#endif + byte type; + word32 reseedCtr; - if (drbg->reseedCtr != RESEED_INTERVAL) { - byte type = drbgGenerateH; - word32 reseedCtr = drbg->reseedCtr; + if (drbg->reseedCtr == RESEED_INTERVAL) { + return DRBG_NEED_RESEED; + } else { + #ifdef WC_ASYNC_ENABLE_SHA256 + DECLARE_VAR(digest, byte, WC_SHA256_DIGEST_SIZE, drbg->heap); + if (digest == NULL) + return MEMORY_E; + #else + byte digest[WC_SHA256_DIGEST_SIZE]; + #endif + type = drbgGenerateH; + reseedCtr = drbg->reseedCtr; ret = Hash_gen(drbg, out, outSz, drbg->V); if (ret == DRBG_SUCCESS) { - if (wc_InitSha256(&sha) != 0 || - wc_Sha256Update(&sha, &type, sizeof(type)) != 0 || - wc_Sha256Update(&sha, drbg->V, sizeof(drbg->V)) != 0 || - wc_Sha256Final(&sha, digest) != 0) { +#ifndef WOLFSSL_SMALL_STACK_CACHE + #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB) + ret = wc_InitSha256_ex(sha, drbg->heap, drbg->devId); + #else + ret = wc_InitSha256(sha); + #endif + if (ret == 0) +#endif + ret = wc_Sha256Update(sha, &type, sizeof(type)); + if (ret == 0) + ret = wc_Sha256Update(sha, drbg->V, sizeof(drbg->V)); + if (ret == 0) + ret = wc_Sha256Final(sha, digest); + +#ifndef WOLFSSL_SMALL_STACK_CACHE + wc_Sha256Free(sha); +#endif - ret = DRBG_FAILURE; - } - else { - array_add(drbg->V, sizeof(drbg->V), digest, sizeof(digest)); + if (ret == 0) { + array_add(drbg->V, sizeof(drbg->V), digest, WC_SHA256_DIGEST_SIZE); array_add(drbg->V, sizeof(drbg->V), drbg->C, sizeof(drbg->C)); - #ifdef LITTLE_ENDIAN_ORDER - reseedCtr = ByteReverseWord32(reseedCtr); - #endif + #ifdef LITTLE_ENDIAN_ORDER + reseedCtr = ByteReverseWord32(reseedCtr); + #endif array_add(drbg->V, sizeof(drbg->V), (byte*)&reseedCtr, sizeof(reseedCtr)); ret = DRBG_SUCCESS; } drbg->reseedCtr++; } + ForceZero(digest, WC_SHA256_DIGEST_SIZE); + #ifdef WC_ASYNC_ENABLE_SHA256 + FREE_VAR(digest, drbg->heap); + #endif } - ForceZero(digest, sizeof(digest)); - return ret; + return (ret == 0) ? DRBG_SUCCESS : DRBG_FAILURE; } - /* Returns: DRBG_SUCCESS or DRBG_FAILURE */ static int Hash_DRBG_Instantiate(DRBG* drbg, const byte* seed, word32 seedSz, - const byte* nonce, word32 nonceSz) + const byte* nonce, word32 nonceSz, + void* heap, int devId) { - int ret = DRBG_FAILURE; + int ret; XMEMSET(drbg, 0, sizeof(DRBG)); +#if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB) + drbg->heap = heap; + drbg->devId = devId; +#else + (void)heap; + (void)devId; +#endif + +#ifdef WOLFSSL_SMALL_STACK_CACHE + #if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB) + ret = wc_InitSha256_ex(&drbg->sha256, drbg->heap, drbg->devId); + #else + ret = wc_InitSha256(&drbg->sha256); + #endif + if (ret != 0) + return ret; +#endif if (Hash_df(drbg, drbg->V, sizeof(drbg->V), drbgInitV, seed, seedSz, nonce, nonceSz) == DRBG_SUCCESS && @@ -410,11 +645,13 @@ static int Hash_DRBG_Instantiate(DRBG* drbg, const byte* seed, word32 seedSz, drbg->matchCount = 0; ret = DRBG_SUCCESS; } + else { + ret = DRBG_FAILURE; + } return ret; } - /* Returns: DRBG_SUCCESS or DRBG_FAILURE */ static int Hash_DRBG_Uninstantiate(DRBG* drbg) { @@ -422,6 +659,10 @@ static int Hash_DRBG_Uninstantiate(DRBG* drbg) int compareSum = 0; byte* compareDrbg = (byte*)drbg; +#ifdef WOLFSSL_SMALL_STACK_CACHE + wc_Sha256Free(&drbg->sha256); +#endif + ForceZero(drbg, sizeof(DRBG)); for (i = 0; i < sizeof(DRBG); i++) @@ -430,91 +671,293 @@ static int Hash_DRBG_Uninstantiate(DRBG* drbg) return (compareSum == 0) ? DRBG_SUCCESS : DRBG_FAILURE; } + +int wc_RNG_TestSeed(const byte* seed, word32 seedSz) +{ + int ret = DRBG_SUCCESS; + + /* Check the seed for duplicate words. */ + word32 seedIdx = 0; + word32 scratchSz = min(SEED_BLOCK_SZ, seedSz - SEED_BLOCK_SZ); + + while (seedIdx < seedSz - SEED_BLOCK_SZ) { + if (ConstantCompare(seed + seedIdx, + seed + seedIdx + scratchSz, + scratchSz) == 0) { + + ret = DRBG_CONT_FAILURE; + } + seedIdx += SEED_BLOCK_SZ; + scratchSz = min(SEED_BLOCK_SZ, (seedSz - seedIdx)); + } + + return ret; +} +#endif /* HAVE_HASHDRBG */ /* End NIST DRBG Code */ -/* Get seed and key cipher */ -int wc_InitRng(RNG* rng) +static int _InitRng(WC_RNG* rng, byte* nonce, word32 nonceSz, + void* heap, int devId) { - int ret = BAD_FUNC_ARG; + int ret = RNG_FAILURE_E; +#ifdef HAVE_HASHDRBG + word32 seedSz = SEED_SZ + SEED_BLOCK_SZ; +#endif - if (rng != NULL) { - if (wc_RNG_HealthTestLocal(0) == 0) { - byte entropy[ENTROPY_NONCE_SZ]; + (void)nonce; + (void)nonceSz; - rng->drbg = - (struct DRBG*)XMALLOC(sizeof(DRBG), NULL, DYNAMIC_TYPE_RNG); - if (rng->drbg == NULL) { - ret = MEMORY_E; - } - /* This doesn't use a separate nonce. The entropy input will be - * the default size plus the size of the nonce making the seed - * size. */ - else if (wc_GenerateSeed(&rng->seed, - entropy, ENTROPY_NONCE_SZ) == 0 && - Hash_DRBG_Instantiate(rng->drbg, - entropy, ENTROPY_NONCE_SZ, NULL, 0) == DRBG_SUCCESS) { - - ret = Hash_DRBG_Generate(rng->drbg, NULL, 0); - } - else - ret = DRBG_FAILURE; + if (rng == NULL) + return BAD_FUNC_ARG; + if (nonce == NULL && nonceSz != 0) + return BAD_FUNC_ARG; - ForceZero(entropy, ENTROPY_NONCE_SZ); - } - else - ret = DRBG_CONT_FAILURE; +#ifdef WOLFSSL_HEAP_TEST + rng->heap = (void*)WOLFSSL_HEAP_TEST; + (void)heap; +#else + rng->heap = heap; +#endif +#if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB) + rng->devId = devId; + #if defined(WOLF_CRYPTO_CB) + rng->seed.devId = devId; + #endif +#else + (void)devId; +#endif - if (ret == DRBG_SUCCESS) { - rng->status = DRBG_OK; - ret = 0; - } - else if (ret == DRBG_CONT_FAILURE) { - rng->status = DRBG_CONT_FAILED; - ret = DRBG_CONT_FIPS_E; - } - else if (ret == DRBG_FAILURE) { - rng->status = DRBG_FAILED; - ret = RNG_FAILURE_E; +#ifdef HAVE_HASHDRBG + /* init the DBRG to known values */ + rng->drbg = NULL; + rng->status = DRBG_NOT_INIT; +#endif + +#if defined(HAVE_INTEL_RDSEED) || defined(HAVE_INTEL_RDRAND) + /* init the intel RD seed and/or rand */ + wc_InitRng_IntelRD(); +#endif + + /* configure async RNG source if available */ +#ifdef WOLFSSL_ASYNC_CRYPT + ret = wolfAsync_DevCtxInit(&rng->asyncDev, WOLFSSL_ASYNC_MARKER_RNG, + rng->heap, rng->devId); + if (ret != 0) + return ret; +#endif + +#ifdef HAVE_INTEL_RDRAND + /* if CPU supports RDRAND, use it directly and by-pass DRBG init */ + if (IS_INTEL_RDRAND(intel_flags)) + return 0; +#endif + +#ifdef CUSTOM_RAND_GENERATE_BLOCK + ret = 0; /* success */ +#else +#ifdef HAVE_HASHDRBG + if (nonceSz == 0) + seedSz = MAX_SEED_SZ; + + if (wc_RNG_HealthTestLocal(0) == 0) { + #ifdef WC_ASYNC_ENABLE_SHA256 + DECLARE_VAR(seed, byte, MAX_SEED_SZ, rng->heap); + if (seed == NULL) + return MEMORY_E; + #else + byte seed[MAX_SEED_SZ]; + #endif + +#if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY) + rng->drbg = + (struct DRBG*)XMALLOC(sizeof(DRBG), rng->heap, + DYNAMIC_TYPE_RNG); +#else + /* compile-time validation of drbg_data size */ + typedef char drbg_data_test[sizeof(rng->drbg_data) >= + sizeof(struct DRBG) ? 1 : -1]; + (void)sizeof(drbg_data_test); + rng->drbg = (struct DRBG*)rng->drbg_data; +#endif + + if (rng->drbg == NULL) { + ret = MEMORY_E; } else { - rng->status = DRBG_FAILED; + ret = wc_GenerateSeed(&rng->seed, seed, seedSz); + if (ret != 0) + ret = DRBG_FAILURE; + else + ret = wc_RNG_TestSeed(seed, seedSz); + + if (ret == DRBG_SUCCESS) + ret = Hash_DRBG_Instantiate(rng->drbg, + seed + SEED_BLOCK_SZ, seedSz - SEED_BLOCK_SZ, + nonce, nonceSz, rng->heap, devId); + + if (ret != DRBG_SUCCESS) { + #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY) + XFREE(rng->drbg, rng->heap, DYNAMIC_TYPE_RNG); + #endif + rng->drbg = NULL; + } } + + ForceZero(seed, seedSz); + #ifdef WC_ASYNC_ENABLE_SHA256 + FREE_VAR(seed, rng->heap); + #endif + } + else + ret = DRBG_CONT_FAILURE; + + if (ret == DRBG_SUCCESS) { + rng->status = DRBG_OK; + ret = 0; + } + else if (ret == DRBG_CONT_FAILURE) { + rng->status = DRBG_CONT_FAILED; + ret = DRBG_CONT_FIPS_E; + } + else if (ret == DRBG_FAILURE) { + rng->status = DRBG_FAILED; + ret = RNG_FAILURE_E; + } + else { + rng->status = DRBG_FAILED; } +#endif /* HAVE_HASHDRBG */ +#endif /* CUSTOM_RAND_GENERATE_BLOCK */ return ret; } +WOLFSSL_ABI +WC_RNG* wc_rng_new(byte* nonce, word32 nonceSz, void* heap) +{ + WC_RNG* rng; + + rng = (WC_RNG*)XMALLOC(sizeof(WC_RNG), heap, DYNAMIC_TYPE_RNG); + if (rng) { + int error = _InitRng(rng, nonce, nonceSz, heap, INVALID_DEVID) != 0; + if (error) { + XFREE(rng, heap, DYNAMIC_TYPE_RNG); + rng = NULL; + } + } + + return rng; +} + + +WOLFSSL_ABI +void wc_rng_free(WC_RNG* rng) +{ + if (rng) { + void* heap = rng->heap; + + wc_FreeRng(rng); + ForceZero(rng, sizeof(WC_RNG)); + XFREE(rng, heap, DYNAMIC_TYPE_RNG); + (void)heap; + } +} + + +int wc_InitRng(WC_RNG* rng) +{ + return _InitRng(rng, NULL, 0, NULL, INVALID_DEVID); +} + + +int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId) +{ + return _InitRng(rng, NULL, 0, heap, devId); +} + + +int wc_InitRngNonce(WC_RNG* rng, byte* nonce, word32 nonceSz) +{ + return _InitRng(rng, nonce, nonceSz, NULL, INVALID_DEVID); +} + + +int wc_InitRngNonce_ex(WC_RNG* rng, byte* nonce, word32 nonceSz, + void* heap, int devId) +{ + return _InitRng(rng, nonce, nonceSz, heap, devId); +} + + /* place a generated block in output */ -int wc_RNG_GenerateBlock(RNG* rng, byte* output, word32 sz) +WOLFSSL_ABI +int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz) { int ret; - if (rng == NULL || output == NULL || sz > MAX_REQUEST_LEN) + if (rng == NULL || output == NULL) + return BAD_FUNC_ARG; + +#ifdef WOLF_CRYPTO_CB + if (rng->devId != INVALID_DEVID) { + ret = wc_CryptoCb_RandomBlock(rng, output, sz); + if (ret != CRYPTOCB_UNAVAILABLE) + return ret; + /* fall-through when unavailable */ + } +#endif + +#ifdef HAVE_INTEL_RDRAND + if (IS_INTEL_RDRAND(intel_flags)) + return wc_GenerateRand_IntelRD(NULL, output, sz); +#endif + +#if defined(WOLFSSL_ASYNC_CRYPT) + if (rng->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RNG) { + /* these are blocking */ + #ifdef HAVE_CAVIUM + return NitroxRngGenerateBlock(rng, output, sz); + #elif defined(HAVE_INTEL_QA) && defined(QAT_ENABLE_RNG) + return IntelQaDrbg(&rng->asyncDev, output, sz); + #else + /* simulator not supported */ + #endif + } +#endif + +#ifdef CUSTOM_RAND_GENERATE_BLOCK + XMEMSET(output, 0, sz); + ret = CUSTOM_RAND_GENERATE_BLOCK(output, sz); +#else + +#ifdef HAVE_HASHDRBG + if (sz > RNG_MAX_BLOCK_LEN) return BAD_FUNC_ARG; if (rng->status != DRBG_OK) return RNG_FAILURE_E; ret = Hash_DRBG_Generate(rng->drbg, output, sz); - if (ret == DRBG_NEED_RESEED) { if (wc_RNG_HealthTestLocal(1) == 0) { - byte entropy[ENTROPY_SZ]; + byte newSeed[SEED_SZ + SEED_BLOCK_SZ]; - if (wc_GenerateSeed(&rng->seed, entropy, ENTROPY_SZ) == 0 && - Hash_DRBG_Reseed(rng->drbg, entropy, ENTROPY_SZ) - == DRBG_SUCCESS) { - - ret = Hash_DRBG_Generate(rng->drbg, NULL, 0); - if (ret == DRBG_SUCCESS) - ret = Hash_DRBG_Generate(rng->drbg, output, sz); - } - else + ret = wc_GenerateSeed(&rng->seed, newSeed, + SEED_SZ + SEED_BLOCK_SZ); + if (ret != 0) ret = DRBG_FAILURE; + else + ret = wc_RNG_TestSeed(newSeed, SEED_SZ + SEED_BLOCK_SZ); + + if (ret == DRBG_SUCCESS) + ret = Hash_DRBG_Reseed(rng->drbg, newSeed + SEED_BLOCK_SZ, + SEED_SZ); + if (ret == DRBG_SUCCESS) + ret = Hash_DRBG_Generate(rng->drbg, output, sz); - ForceZero(entropy, ENTROPY_SZ); + ForceZero(newSeed, sizeof(newSeed)); } else ret = DRBG_CONT_FAILURE; @@ -531,90 +974,147 @@ int wc_RNG_GenerateBlock(RNG* rng, byte* output, word32 sz) ret = RNG_FAILURE_E; rng->status = DRBG_FAILED; } +#else + + /* if we get here then there is an RNG configuration error */ + ret = RNG_FAILURE_E; + +#endif /* HAVE_HASHDRBG */ +#endif /* CUSTOM_RAND_GENERATE_BLOCK */ return ret; } -int wc_RNG_GenerateByte(RNG* rng, byte* b) +int wc_RNG_GenerateByte(WC_RNG* rng, byte* b) { return wc_RNG_GenerateBlock(rng, b, 1); } -int wc_FreeRng(RNG* rng) +int wc_FreeRng(WC_RNG* rng) { - int ret = BAD_FUNC_ARG; + int ret = 0; - if (rng != NULL) { - if (rng->drbg != NULL) { - if (Hash_DRBG_Uninstantiate(rng->drbg) == DRBG_SUCCESS) - ret = 0; - else - ret = RNG_FAILURE_E; + if (rng == NULL) + return BAD_FUNC_ARG; - XFREE(rng->drbg, NULL, DYNAMIC_TYPE_RNG); - rng->drbg = NULL; - } +#if defined(WOLFSSL_ASYNC_CRYPT) + wolfAsync_DevCtxFree(&rng->asyncDev, WOLFSSL_ASYNC_MARKER_RNG); +#endif - rng->status = DRBG_NOT_INIT; +#ifdef HAVE_HASHDRBG + if (rng->drbg != NULL) { + if (Hash_DRBG_Uninstantiate(rng->drbg) != DRBG_SUCCESS) + ret = RNG_FAILURE_E; + + #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY) + XFREE(rng->drbg, rng->heap, DYNAMIC_TYPE_RNG); + #endif + rng->drbg = NULL; } + rng->status = DRBG_NOT_INIT; +#endif /* HAVE_HASHDRBG */ + return ret; } - -int wc_RNG_HealthTest(int reseed, const byte* entropyA, word32 entropyASz, - const byte* entropyB, word32 entropyBSz, +#ifdef HAVE_HASHDRBG +int wc_RNG_HealthTest(int reseed, const byte* seedA, word32 seedASz, + const byte* seedB, word32 seedBSz, byte* output, word32 outputSz) { - DRBG drbg; + return wc_RNG_HealthTest_ex(reseed, NULL, 0, + seedA, seedASz, seedB, seedBSz, + output, outputSz, + NULL, INVALID_DEVID); +} + + +int wc_RNG_HealthTest_ex(int reseed, const byte* nonce, word32 nonceSz, + const byte* seedA, word32 seedASz, + const byte* seedB, word32 seedBSz, + byte* output, word32 outputSz, + void* heap, int devId) +{ + int ret = -1; + DRBG* drbg; +#ifndef WOLFSSL_SMALL_STACK + DRBG drbg_var; +#endif - if (entropyA == NULL || output == NULL) + if (seedA == NULL || output == NULL) { return BAD_FUNC_ARG; + } - if (reseed != 0 && entropyB == NULL) + if (reseed != 0 && seedB == NULL) { return BAD_FUNC_ARG; + } - if (outputSz != (SHA256_DIGEST_SIZE * 4)) - return -1; + if (outputSz != RNG_HEALTH_TEST_CHECK_SIZE) { + return ret; + } - if (Hash_DRBG_Instantiate(&drbg, entropyA, entropyASz, NULL, 0) != 0) - return -1; +#ifdef WOLFSSL_SMALL_STACK + drbg = (DRBG*)XMALLOC(sizeof(DRBG), NULL, DYNAMIC_TYPE_RNG); + if (drbg == NULL) { + return MEMORY_E; + } +#else + drbg = &drbg_var; +#endif + + if (Hash_DRBG_Instantiate(drbg, seedA, seedASz, nonce, nonceSz, + heap, devId) != 0) { + goto exit_rng_ht; + } if (reseed) { - if (Hash_DRBG_Reseed(&drbg, entropyB, entropyBSz) != 0) { - Hash_DRBG_Uninstantiate(&drbg); - return -1; + if (Hash_DRBG_Reseed(drbg, seedB, seedBSz) != 0) { + goto exit_rng_ht; } } - if (Hash_DRBG_Generate(&drbg, output, outputSz) != 0) { - Hash_DRBG_Uninstantiate(&drbg); - return -1; + /* This call to generate is prescribed by the NIST DRBGVS + * procedure. The results are thrown away. The known + * answer test checks the second block of DRBG out of + * the generator to ensure the internal state is updated + * as expected. */ + if (Hash_DRBG_Generate(drbg, output, outputSz) != 0) { + goto exit_rng_ht; } - if (Hash_DRBG_Generate(&drbg, output, outputSz) != 0) { - Hash_DRBG_Uninstantiate(&drbg); - return -1; + if (Hash_DRBG_Generate(drbg, output, outputSz) != 0) { + goto exit_rng_ht; } - if (Hash_DRBG_Uninstantiate(&drbg) != 0) { - return -1; + /* Mark success */ + ret = 0; + +exit_rng_ht: + + /* This is safe to call even if Hash_DRBG_Instantiate fails */ + if (Hash_DRBG_Uninstantiate(drbg) != 0) { + ret = -1; } - return 0; +#ifdef WOLFSSL_SMALL_STACK + XFREE(drbg, NULL, DYNAMIC_TYPE_RNG); +#endif + + return ret; } -const byte entropyA[] = { +const byte seedA[] = { 0x63, 0x36, 0x33, 0x77, 0xe4, 0x1e, 0x86, 0x46, 0x8d, 0xeb, 0x0a, 0xb4, 0xa8, 0xed, 0x68, 0x3f, 0x6a, 0x13, 0x4e, 0x47, 0xe0, 0x14, 0xc7, 0x00, 0x45, 0x4e, 0x81, 0xe9, 0x53, 0x58, 0xa5, 0x69, 0x80, 0x8a, 0xa3, 0x8f, 0x2a, 0x72, 0xa6, 0x23, 0x59, 0x91, 0x5a, 0x9f, 0x8a, 0x04, 0xca, 0x68 }; -const byte reseedEntropyA[] = { +const byte reseedSeedA[] = { 0xe6, 0x2b, 0x8a, 0x8e, 0xe8, 0xf1, 0x41, 0xb6, 0x98, 0x05, 0x66, 0xe3, 0xbf, 0xe3, 0xc0, 0x49, 0x03, 0xda, 0xd4, 0xac, 0x2c, 0xdf, 0x9f, 0x22, 0x80, 0x01, 0x0a, 0x67, 0x39, 0xbc, 0x83, 0xd3 @@ -634,11 +1134,12 @@ const byte outputA[] = { 0xa1, 0x80, 0x18, 0x3a, 0x07, 0xdf, 0xae, 0x17 }; -const byte entropyB[] = { +const byte seedB[] = { 0xa6, 0x5a, 0xd0, 0xf3, 0x45, 0xdb, 0x4e, 0x0e, 0xff, 0xe8, 0x75, 0xc3, 0xa2, 0xe7, 0x1f, 0x42, 0xc7, 0x12, 0x9d, 0x62, 0x0f, 0xf5, 0xc1, 0x19, - 0xa9, 0xef, 0x55, 0xf0, 0x51, 0x85, 0xe0, 0xfb, 0x85, 0x81, 0xf9, 0x31, - 0x75, 0x17, 0x27, 0x6e, 0x06, 0xe9, 0x60, 0x7d, 0xdb, 0xcb, 0xcc, 0x2e + 0xa9, 0xef, 0x55, 0xf0, 0x51, 0x85, 0xe0, 0xfb, /* nonce next */ + 0x85, 0x81, 0xf9, 0x31, 0x75, 0x17, 0x27, 0x6e, 0x06, 0xe9, 0x60, 0x7d, + 0xdb, 0xcb, 0xcc, 0x2e }; const byte outputB[] = { @@ -659,320 +1160,423 @@ const byte outputB[] = { static int wc_RNG_HealthTestLocal(int reseed) { int ret = 0; - byte check[SHA256_DIGEST_SIZE * 4]; +#ifdef WOLFSSL_SMALL_STACK + byte* check; +#else + byte check[RNG_HEALTH_TEST_CHECK_SIZE]; +#endif + +#ifdef WOLFSSL_SMALL_STACK + check = (byte*)XMALLOC(RNG_HEALTH_TEST_CHECK_SIZE, NULL, + DYNAMIC_TYPE_TMP_BUFFER); + if (check == NULL) { + return MEMORY_E; + } +#endif if (reseed) { - ret = wc_RNG_HealthTest(1, entropyA, sizeof(entropyA), - reseedEntropyA, sizeof(reseedEntropyA), - check, sizeof(check)); + ret = wc_RNG_HealthTest(1, seedA, sizeof(seedA), + reseedSeedA, sizeof(reseedSeedA), + check, RNG_HEALTH_TEST_CHECK_SIZE); if (ret == 0) { - if (ConstantCompare(check, outputA, sizeof(check)) != 0) + if (ConstantCompare(check, outputA, + RNG_HEALTH_TEST_CHECK_SIZE) != 0) ret = -1; } } else { - ret = wc_RNG_HealthTest(0, entropyB, sizeof(entropyB), + ret = wc_RNG_HealthTest(0, seedB, sizeof(seedB), NULL, 0, - check, sizeof(check)); + check, RNG_HEALTH_TEST_CHECK_SIZE); if (ret == 0) { - if (ConstantCompare(check, outputB, sizeof(check)) != 0) + if (ConstantCompare(check, outputB, + RNG_HEALTH_TEST_CHECK_SIZE) != 0) ret = -1; } + + /* The previous test cases use a large seed instead of a seed and nonce. + * seedB is actually from a test case with a seed and nonce, and + * just concatenates them. The pivot point between seed and nonce is + * byte 32, feed them into the health test separately. */ + if (ret == 0) { + ret = wc_RNG_HealthTest_ex(0, + seedB + 32, sizeof(seedB) - 32, + seedB, 32, + NULL, 0, + check, RNG_HEALTH_TEST_CHECK_SIZE, + NULL, INVALID_DEVID); + if (ret == 0) { + if (ConstantCompare(check, outputB, sizeof(outputB)) != 0) + ret = -1; + } + } } +#ifdef WOLFSSL_SMALL_STACK + XFREE(check, NULL, DYNAMIC_TYPE_TMP_BUFFER); +#endif + return ret; } +#endif /* HAVE_HASHDRBG */ -#else /* HAVE_HASHDRBG || NO_RC4 */ -/* Get seed and key cipher */ -int wc_InitRng(RNG* rng) +#ifdef HAVE_WNR + +/* + * Init global Whitewood netRandom context + * Returns 0 on success, negative on error + */ +int wc_InitNetRandom(const char* configFile, wnr_hmac_key hmac_cb, int timeout) { - int ret; -#ifdef WOLFSSL_SMALL_STACK - byte* key; - byte* junk; -#else - byte key[32]; - byte junk[256]; -#endif + if (configFile == NULL || timeout < 0) + return BAD_FUNC_ARG; -#ifdef HAVE_INTEL_RDGEN - wc_InitRng_IntelRD() ; - if(IS_INTEL_RDRAND)return 0 ; -#endif -#ifdef HAVE_CAVIUM - if (rng->magic == WOLFSSL_RNG_CAVIUM_MAGIC) + if (wnr_mutex_init > 0) { + WOLFSSL_MSG("netRandom context already created, skipping"); return 0; -#endif - -#ifdef WOLFSSL_SMALL_STACK - key = (byte*)XMALLOC(32, NULL, DYNAMIC_TYPE_TMP_BUFFER); - if (key == NULL) - return MEMORY_E; + } - junk = (byte*)XMALLOC(256, NULL, DYNAMIC_TYPE_TMP_BUFFER); - if (junk == NULL) { - XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); - return MEMORY_E; + if (wc_InitMutex(&wnr_mutex) != 0) { + WOLFSSL_MSG("Bad Init Mutex wnr_mutex"); + return BAD_MUTEX_E; } -#endif + wnr_mutex_init = 1; - ret = wc_GenerateSeed(&rng->seed, key, 32); + if (wc_LockMutex(&wnr_mutex) != 0) { + WOLFSSL_MSG("Bad Lock Mutex wnr_mutex"); + return BAD_MUTEX_E; + } - if (ret == 0) { - wc_Arc4SetKey(&rng->cipher, key, sizeof(key)); + /* store entropy timeout */ + wnr_timeout = timeout; - ret = wc_RNG_GenerateBlock(rng, junk, 256); /*rid initial state*/ + /* create global wnr_context struct */ + if (wnr_create(&wnr_ctx) != WNR_ERROR_NONE) { + WOLFSSL_MSG("Error creating global netRandom context"); + return RNG_FAILURE_E; } -#ifdef WOLFSSL_SMALL_STACK - XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); - XFREE(junk, NULL, DYNAMIC_TYPE_TMP_BUFFER); -#endif + /* load config file */ + if (wnr_config_loadf(wnr_ctx, (char*)configFile) != WNR_ERROR_NONE) { + WOLFSSL_MSG("Error loading config file into netRandom context"); + wnr_destroy(wnr_ctx); + wnr_ctx = NULL; + return RNG_FAILURE_E; + } - return ret; -} + /* create/init polling mechanism */ + if (wnr_poll_create() != WNR_ERROR_NONE) { + printf("ERROR: wnr_poll_create() failed\n"); + WOLFSSL_MSG("Error initializing netRandom polling mechanism"); + wnr_destroy(wnr_ctx); + wnr_ctx = NULL; + return RNG_FAILURE_E; + } -#ifdef HAVE_CAVIUM - static void CaviumRNG_GenerateBlock(RNG* rng, byte* output, word32 sz); -#endif + /* validate config, set HMAC callback (optional) */ + if (wnr_setup(wnr_ctx, hmac_cb) != WNR_ERROR_NONE) { + WOLFSSL_MSG("Error setting up netRandom context"); + wnr_destroy(wnr_ctx); + wnr_ctx = NULL; + wnr_poll_destroy(); + return RNG_FAILURE_E; + } -/* place a generated block in output */ -int wc_RNG_GenerateBlock(RNG* rng, byte* output, word32 sz) -{ -#ifdef HAVE_INTEL_RDGEN - if(IS_INTEL_RDRAND) - return wc_GenerateRand_IntelRD(NULL, output, sz) ; -#endif -#ifdef HAVE_CAVIUM - if (rng->magic == WOLFSSL_RNG_CAVIUM_MAGIC) - return CaviumRNG_GenerateBlock(rng, output, sz); -#endif - XMEMSET(output, 0, sz); - wc_Arc4Process(&rng->cipher, output, output, sz); + wc_UnLockMutex(&wnr_mutex); return 0; } - -int wc_RNG_GenerateByte(RNG* rng, byte* b) +/* + * Free global Whitewood netRandom context + * Returns 0 on success, negative on error + */ +int wc_FreeNetRandom(void) { - return wc_RNG_GenerateBlock(rng, b, 1); -} + if (wnr_mutex_init > 0) { + if (wc_LockMutex(&wnr_mutex) != 0) { + WOLFSSL_MSG("Bad Lock Mutex wnr_mutex"); + return BAD_MUTEX_E; + } + + if (wnr_ctx != NULL) { + wnr_destroy(wnr_ctx); + wnr_ctx = NULL; + } + wnr_poll_destroy(); + + wc_UnLockMutex(&wnr_mutex); + + wc_FreeMutex(&wnr_mutex); + wnr_mutex_init = 0; + } -int wc_FreeRng(RNG* rng) -{ - (void)rng; return 0; } +#endif /* HAVE_WNR */ -#ifdef HAVE_CAVIUM -#include <wolfssl/ctaocrypt/logging.h> -#include "cavium_common.h" +#if defined(HAVE_INTEL_RDRAND) || defined(HAVE_INTEL_RDSEED) -/* Initiliaze RNG for use with Nitrox device */ -int wc_InitRngCavium(RNG* rng, int devId) -{ - if (rng == NULL) - return -1; - - rng->devId = devId; - rng->magic = WOLFSSL_RNG_CAVIUM_MAGIC; +#ifdef WOLFSSL_ASYNC_CRYPT + /* need more retries if multiple cores */ + #define INTELRD_RETRY (32 * 8) +#else + #define INTELRD_RETRY 32 +#endif - return 0; -} +#ifdef HAVE_INTEL_RDSEED +#ifndef USE_WINDOWS_API -static void CaviumRNG_GenerateBlock(RNG* rng, byte* output, word32 sz) -{ - wolfssl_word offset = 0; - word32 requestId; + /* return 0 on success */ + static WC_INLINE int IntelRDseed64(word64* seed) + { + unsigned char ok; - while (sz > WOLFSSL_MAX_16BIT) { - word16 slen = (word16)WOLFSSL_MAX_16BIT; - if (CspRandom(CAVIUM_BLOCKING, slen, output + offset, &requestId, - rng->devId) != 0) { - WOLFSSL_MSG("Cavium RNG failed"); - } - sz -= WOLFSSL_MAX_16BIT; - offset += WOLFSSL_MAX_16BIT; - } - if (sz) { - word16 slen = (word16)sz; - if (CspRandom(CAVIUM_BLOCKING, slen, output + offset, &requestId, - rng->devId) != 0) { - WOLFSSL_MSG("Cavium RNG failed"); - } + __asm__ volatile("rdseed %0; setc %1":"=r"(*seed), "=qm"(ok)); + return (ok) ? 0 : -1; } -} -#endif /* HAVE_CAVIUM */ +#else /* USE_WINDOWS_API */ + /* The compiler Visual Studio uses does not allow inline assembly. + * It does allow for Intel intrinsic functions. */ -#endif /* HAVE_HASHDRBG || NO_RC4 */ + /* return 0 on success */ + static WC_INLINE int IntelRDseed64(word64* seed) + { + int ok; + ok = _rdseed64_step(seed); + return (ok) ? 0 : -1; + } -#if defined(HAVE_INTEL_RDGEN) +#endif /* USE_WINDOWS_API */ -#ifndef _MSC_VER - #define cpuid(reg, leaf, sub)\ - __asm__ __volatile__ ("cpuid":\ - "=a" (reg[0]), "=b" (reg[1]), "=c" (reg[2]), "=d" (reg[3]) :\ - "a" (leaf), "c"(sub)); +/* return 0 on success */ +static WC_INLINE int IntelRDseed64_r(word64* rnd) +{ + int i; + for (i = 0; i < INTELRD_RETRY; i++) { + if (IntelRDseed64(rnd) == 0) + return 0; + } + return -1; +} - #define XASM_LINK(f) asm(f) -#else +/* return 0 on success */ +static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz) +{ + int ret; + word64 rndTmp; - #include <intrin.h> - #define cpuid(a,b) __cpuid((int*)a,b) + (void)os; - #define XASM_LINK(f) + if (!IS_INTEL_RDSEED(intel_flags)) + return -1; -#endif /* _MSC_VER */ + for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64), + output += sizeof(word64)) { + ret = IntelRDseed64_r((word64*)output); + if (ret != 0) + return ret; + } + if (sz == 0) + return 0; -#define EAX 0 -#define EBX 1 -#define ECX 2 -#define EDX 3 + /* handle unaligned remainder */ + ret = IntelRDseed64_r(&rndTmp); + if (ret != 0) + return ret; -static word32 cpuid_flag(word32 leaf, word32 sub, word32 num, word32 bit) { - int got_intel_cpu=0; - unsigned int reg[5]; - - reg[4] = '\0' ; - cpuid(reg, 0, 0); - if(memcmp((char *)&(reg[EBX]), "Genu", 4) == 0 && - memcmp((char *)&(reg[EDX]), "ineI", 4) == 0 && - memcmp((char *)&(reg[ECX]), "ntel", 4) == 0) { - got_intel_cpu = 1; - } - if (got_intel_cpu) { - cpuid(reg, leaf, sub); - return((reg[num]>>bit)&0x1) ; - } - return 0 ; -} + XMEMCPY(output, &rndTmp, sz); + ForceZero(&rndTmp, sizeof(rndTmp)); -static int wc_InitRng_IntelRD() -{ - if(cpuid_check==0) { - if(cpuid_flag(1, 0, ECX, 30)){ cpuid_flags |= CPUID_RDRAND ;} - if(cpuid_flag(7, 0, EBX, 18)){ cpuid_flags |= CPUID_RDSEED ;} - cpuid_check = 1 ; - } - return 1 ; + return 0; } -#define INTELRD_RETRY 10 +#endif /* HAVE_INTEL_RDSEED */ -#if defined(HAVE_HASHDRBG) || defined(NO_RC4) +#ifdef HAVE_INTEL_RDRAND -/* return 0 on success */ -static inline int IntelRDseed32(unsigned int *seed) -{ - int rdseed; unsigned char ok ; - - __asm__ volatile("rdseed %0; setc %1":"=r"(rdseed), "=qm"(ok)); - if(ok){ - *seed = rdseed ; - return 0 ; - } else - return 1; -} +#ifndef USE_WINDOWS_API /* return 0 on success */ -static inline int IntelRDseed32_r(unsigned int *rnd) -{ - int i ; - for(i=0; i<INTELRD_RETRY;i++) { - if(IntelRDseed32(rnd) == 0) return 0 ; - } - return 1 ; +static WC_INLINE int IntelRDrand64(word64 *rnd) +{ + unsigned char ok; + + __asm__ volatile("rdrand %0; setc %1":"=r"(*rnd), "=qm"(ok)); + + return (ok) ? 0 : -1; } +#else /* USE_WINDOWS_API */ + /* The compiler Visual Studio uses does not allow inline assembly. + * It does allow for Intel intrinsic functions. */ + /* return 0 on success */ -static int wc_GenerateSeed_IntelRD(OS_Seed* os, byte* output, word32 sz) +static WC_INLINE int IntelRDrand64(word64 *rnd) { - (void) os ; - int ret ; - unsigned int rndTmp ; - - for( ; sz/4 > 0; sz-=4, output+=4) { - if(IS_INTEL_RDSEED)ret = IntelRDseed32_r((word32 *)output) ; - else return 1 ; - if(ret) - return 1 ; - } - if(sz == 0)return 0 ; - - if(IS_INTEL_RDSEED)ret = IntelRDseed32_r(&rndTmp) ; - else return 1 ; - if(ret) - return 1 ; - XMEMCPY(output, &rndTmp, sz) ; - return 0; -} + int ok; -#else + ok = _rdrand64_step(rnd); -/* return 0 on success */ -static inline int IntelRDrand32(unsigned int *rnd) -{ - int rdrand; unsigned char ok ; - __asm__ volatile("rdrand %0; setc %1":"=r"(rdrand), "=qm"(ok)); - if(ok){ - *rnd = rdrand; - return 0 ; - } else - return 1; + return (ok) ? 0 : -1; } +#endif /* USE_WINDOWS_API */ + /* return 0 on success */ -static inline int IntelRDrand32_r(unsigned int *rnd) -{ - int i ; - for(i=0; i<INTELRD_RETRY;i++) { - if(IntelRDrand32(rnd) == 0) return 0 ; +static WC_INLINE int IntelRDrand64_r(word64 *rnd) +{ + int i; + for (i = 0; i < INTELRD_RETRY; i++) { + if (IntelRDrand64(rnd) == 0) + return 0; } - return 1 ; + return -1; } /* return 0 on success */ static int wc_GenerateRand_IntelRD(OS_Seed* os, byte* output, word32 sz) { - (void) os ; - int ret ; - unsigned int rndTmp; - - for( ; sz/4 > 0; sz-=4, output+=4) { - if(IS_INTEL_RDRAND)ret = IntelRDrand32_r((word32 *)output); - else return 1 ; - if(ret) - return 1 ; - } - if(sz == 0)return 0 ; - - if(IS_INTEL_RDRAND)ret = IntelRDrand32_r(&rndTmp); - else return 1 ; - if(ret) - return 1 ; - XMEMCPY(output, &rndTmp, sz) ; + int ret; + word64 rndTmp; + + (void)os; + + if (!IS_INTEL_RDRAND(intel_flags)) + return -1; + + for (; (sz / sizeof(word64)) > 0; sz -= sizeof(word64), + output += sizeof(word64)) { + ret = IntelRDrand64_r((word64 *)output); + if (ret != 0) + return ret; + } + if (sz == 0) + return 0; + + /* handle unaligned remainder */ + ret = IntelRDrand64_r(&rndTmp); + if (ret != 0) + return ret; + + XMEMCPY(output, &rndTmp, sz); + return 0; } -#endif /* defined(HAVE_HASHDRBG) || defined(NO_RC4) */ -#endif /* HAVE_INTEL_RDGEN */ +#endif /* HAVE_INTEL_RDRAND */ +#endif /* HAVE_INTEL_RDRAND || HAVE_INTEL_RDSEED */ + + +/* Begin wc_GenerateSeed Implementations */ +#if defined(CUSTOM_RAND_GENERATE_SEED) + + /* Implement your own random generation function + * Return 0 to indicate success + * int rand_gen_seed(byte* output, word32 sz); + * #define CUSTOM_RAND_GENERATE_SEED rand_gen_seed */ + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + (void)os; /* Suppress unused arg warning */ + return CUSTOM_RAND_GENERATE_SEED(output, sz); + } + +#elif defined(CUSTOM_RAND_GENERATE_SEED_OS) + + /* Implement your own random generation function, + * which includes OS_Seed. + * Return 0 to indicate success + * int rand_gen_seed(OS_Seed* os, byte* output, word32 sz); + * #define CUSTOM_RAND_GENERATE_SEED_OS rand_gen_seed */ + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + return CUSTOM_RAND_GENERATE_SEED_OS(os, output, sz); + } + +#elif defined(CUSTOM_RAND_GENERATE) + + /* Implement your own random generation function + * word32 rand_gen(void); + * #define CUSTOM_RAND_GENERATE rand_gen */ + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + word32 i = 0; + + (void)os; + + while (i < sz) + { + /* If not aligned or there is odd/remainder */ + if( (i + sizeof(CUSTOM_RAND_TYPE)) > sz || + ((wolfssl_word)&output[i] % sizeof(CUSTOM_RAND_TYPE)) != 0 + ) { + /* Single byte at a time */ + output[i++] = (byte)CUSTOM_RAND_GENERATE(); + } + else { + /* Use native 8, 16, 32 or 64 copy instruction */ + *((CUSTOM_RAND_TYPE*)&output[i]) = CUSTOM_RAND_GENERATE(); + i += sizeof(CUSTOM_RAND_TYPE); + } + } + return 0; + } + +#elif defined(WOLFSSL_SGX) + +int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) +{ + int ret = !SGX_SUCCESS; + int i, read_max = 10; + + for (i = 0; i < read_max && ret != SGX_SUCCESS; i++) { + ret = sgx_read_rand(output, sz); + } -#if defined(USE_WINDOWS_API) + (void)os; + return (ret == SGX_SUCCESS) ? 0 : 1; +} +#elif defined(USE_WINDOWS_API) int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { +#ifdef WOLF_CRYPTO_CB + int ret; + + if (os != NULL && os->devId != INVALID_DEVID) { + ret = wc_CryptoCb_RandomSeed(os, output, sz); + if (ret != CRYPTOCB_UNAVAILABLE) + return ret; + /* fall-through when unavailable */ + } +#endif + + #ifdef HAVE_INTEL_RDSEED + if (IS_INTEL_RDSEED(intel_flags)) { + if (!wc_GenerateSeed_IntelRD(NULL, output, sz)) { + /* success, we're done */ + return 0; + } + #ifdef FORCE_FAILURE_RDSEED + /* don't fall back to CryptoAPI */ + return READ_RAN_E; + #endif + } + #endif /* HAVE_INTEL_RDSEED */ + if(!CryptAcquireContext(&os->handle, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) return WINCRYPT_E; @@ -991,92 +1595,85 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) #include "rtprand.h" /* rtp_rand () */ #include "rtptime.h" /* rtp_get_system_msec() */ - int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { - int i; - rtp_srand(rtp_get_system_msec()); + word32 i; + rtp_srand(rtp_get_system_msec()); for (i = 0; i < sz; i++ ) { output[i] = rtp_rand() % 256; - if ( (i % 8) == 7) - rtp_srand(rtp_get_system_msec()); } return 0; } -#elif defined(MICRIUM) - -int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) -{ - #if (NET_SECURE_MGR_CFG_EN == DEF_ENABLED) - NetSecure_InitSeed(output, sz); - #endif - return 0; -} - -#elif defined(MBED) - -/* write a real one !!!, just for testing board */ -int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) -{ - int i; - for (i = 0; i < sz; i++ ) - output[i] = i; - - return 0; -} - #elif defined(MICROCHIP_PIC32) -#ifdef MICROCHIP_MPLAB_HARMONY - #define PIC32_SEED_COUNT _CP0_GET_COUNT -#else - #if !defined(WOLFSSL_MICROCHIP_PIC32MZ) - #include <peripheral/timer.h> + #ifdef MICROCHIP_MPLAB_HARMONY + #ifdef MICROCHIP_MPLAB_HARMONY_3 + #include "system/time/sys_time.h" + #define PIC32_SEED_COUNT SYS_TIME_CounterGet + #else + #define PIC32_SEED_COUNT _CP0_GET_COUNT + #endif + #else + #if !defined(WOLFSSL_MICROCHIP_PIC32MZ) + #include <peripheral/timer.h> + #endif + extern word32 ReadCoreTimer(void); + #define PIC32_SEED_COUNT ReadCoreTimer #endif - #define PIC32_SEED_COUNT ReadCoreTimer -#endif - #ifdef WOLFSSL_MIC32MZ_RNG + + #ifdef WOLFSSL_PIC32MZ_RNG #include "xc.h" int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { - int i ; - byte rnd[8] ; - word32 *rnd32 = (word32 *)rnd ; - word32 size = sz ; - byte* op = output ; - - /* This part has to be replaced with better random seed */ - RNGNUMGEN1 = ReadCoreTimer(); - RNGPOLY1 = ReadCoreTimer(); - RNGPOLY2 = ReadCoreTimer(); - RNGNUMGEN2 = ReadCoreTimer(); -#ifdef DEBUG_WOLFSSL - printf("GenerateSeed::Seed=%08x, %08x\n", RNGNUMGEN1, RNGNUMGEN2) ; + int i; + byte rnd[8]; + word32 *rnd32 = (word32 *)rnd; + word32 size = sz; + byte* op = output; + +#if ((__PIC32_FEATURE_SET0 == 'E') && (__PIC32_FEATURE_SET1 == 'C')) + RNGNUMGEN1 = _CP0_GET_COUNT(); + RNGPOLY1 = _CP0_GET_COUNT(); + RNGPOLY2 = _CP0_GET_COUNT(); + RNGNUMGEN2 = _CP0_GET_COUNT(); +#else + // All others can be seeded from the TRNG + RNGCONbits.TRNGMODE = 1; + RNGCONbits.TRNGEN = 1; + while (RNGCNT < 64); + RNGCONbits.LOAD = 1; + while (RNGCONbits.LOAD == 1); + while (RNGCNT < 64); + RNGPOLY2 = RNGSEED2; + RNGPOLY1 = RNGSEED1; #endif + RNGCONbits.PLEN = 0x40; RNGCONbits.PRNGEN = 1; - for(i=0; i<5; i++) { /* wait for RNGNUMGEN ready */ - volatile int x ; - x = RNGNUMGEN1 ; - x = RNGNUMGEN2 ; + for (i=0; i<5; i++) { /* wait for RNGNUMGEN ready */ + volatile int x, y; + x = RNGNUMGEN1; + y = RNGNUMGEN2; + (void)x; + (void)y; } do { rnd32[0] = RNGNUMGEN1; rnd32[1] = RNGNUMGEN2; for(i=0; i<8; i++, op++) { - *op = rnd[i] ; - size -- ; - if(size==0)break ; + *op = rnd[i]; + size --; + if(size==0)break; } - } while(size) ; + } while(size); return 0; } - #else /* WOLFSSL_MIC32MZ_RNG */ + #else /* WOLFSSL_PIC32MZ_RNG */ /* uses the core timer, in nanoseconds to seed srand */ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { @@ -1090,11 +1687,12 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) } return 0; } - #endif /* WOLFSSL_MIC32MZ_RNG */ + #endif /* WOLFSSL_PIC32MZ_RNG */ -#elif defined(FREESCALE_MQX) +#elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) || \ + defined(FREESCALE_KSDK_BM) || defined(FREESCALE_FREE_RTOS) - #ifdef FREESCALE_K70_RNGA + #if defined(FREESCALE_K70_RNGA) || defined(FREESCALE_RNGA) /* * wc_Generates a RNG seed using the Random Number Generator Accelerator * on the Kinetis K70. Documentation located in Chapter 37 of @@ -1102,10 +1700,16 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) */ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { - int i; + word32 i; /* turn on RNGA module */ - SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK; + #if defined(SIM_SCGC3_RNGA_MASK) + SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK; + #endif + #if defined(SIM_SCGC6_RNGA_MASK) + /* additionally needed for at least K64F */ + SIM_SCGC6 |= SIM_SCGC6_RNGA_MASK; + #endif /* set SLP bit to 0 - "RNGA is not in sleep mode" */ RNG_CR &= ~RNG_CR_SLP_MASK; @@ -1128,7 +1732,7 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) return 0; } - #elif defined(FREESCALE_K53_RNGB) + #elif defined(FREESCALE_K53_RNGB) || defined(FREESCALE_RNGB) /* * wc_Generates a RNG seed using the Random Number Generator (RNGB) * on the Kinetis K53. Documentation located in Chapter 33 of @@ -1166,78 +1770,191 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) return 0; } - #else - #warning "write a real random seed!!!!, just for testing now" + #elif defined(FREESCALE_KSDK_2_0_TRNG) int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { - int i; - for (i = 0; i < sz; i++ ) - output[i] = i; + status_t status; + status = TRNG_GetRandomData(TRNG0, output, sz); + if (status == kStatus_Success) + { + return(0); + } + else + { + return RAN_BLOCK_E; + } + } - return 0; + #elif defined(FREESCALE_KSDK_2_0_RNGA) + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + status_t status; + status = RNGA_GetRandomData(RNG, output, sz); + if (status == kStatus_Success) + { + return(0); + } + else + { + return RAN_BLOCK_E; + } } - #endif /* FREESCALE_K70_RNGA */ -#elif defined(WOLFSSL_SAFERTOS) || defined(WOLFSSL_LEANPSK) \ - || defined(WOLFSSL_IAR_ARM) || defined(WOLFSSL_MDK_ARM) \ - || defined(WOLFSSL_uITRON4) || defined(WOLFSSL_uTKERNEL2) -#warning "write a real random seed!!!!, just for testing now" + #elif defined(FREESCALE_RNGA) -int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) -{ - word32 i; - for (i = 0; i < sz; i++ ) - output[i] = i; + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + RNGA_DRV_GetRandomData(RNGA_INSTANCE, output, sz); + return 0; + } - (void)os; + #else + #define USE_TEST_GENSEED + #endif /* FREESCALE_K70_RNGA */ - return 0; -} +#elif defined(STM32_RNG) + /* Generate a RNG seed using the hardware random number generator + * on the STM32F2/F4/F7/L4. */ -#elif defined(STM32F2_RNG) - #undef RNG - #include "stm32f2xx_rng.h" - #include "stm32f2xx_rcc.h" - /* - * wc_Generate a RNG seed using the hardware random number generator - * on the STM32F2. Documentation located in STM32F2xx Standard Peripheral - * Library document (See note in README). - */ + #ifdef WOLFSSL_STM32_CUBEMX int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { - int i; + int ret; + RNG_HandleTypeDef hrng; + word32 i = 0; + (void)os; + + ret = wolfSSL_CryptHwMutexLock(); + if (ret != 0) { + return ret; + } /* enable RNG clock source */ - RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE); + __HAL_RCC_RNG_CLK_ENABLE(); /* enable RNG peripheral */ - RNG_Cmd(ENABLE); + XMEMSET(&hrng, 0, sizeof(hrng)); + hrng.Instance = RNG; + HAL_RNG_Init(&hrng); + + while (i < sz) { + /* If not aligned or there is odd/remainder */ + if( (i + sizeof(word32)) > sz || + ((wolfssl_word)&output[i] % sizeof(word32)) != 0 + ) { + /* Single byte at a time */ + uint32_t tmpRng = 0; + if (HAL_RNG_GenerateRandomNumber(&hrng, &tmpRng) != HAL_OK) { + wolfSSL_CryptHwMutexUnLock(); + return RAN_BLOCK_E; + } + output[i++] = (byte)tmpRng; + } + else { + /* Use native 32 instruction */ + if (HAL_RNG_GenerateRandomNumber(&hrng, (uint32_t*)&output[i]) != HAL_OK) { + wolfSSL_CryptHwMutexUnLock(); + return RAN_BLOCK_E; + } + i += sizeof(word32); + } + } + + wolfSSL_CryptHwMutexUnLock(); + + return 0; + } + #elif defined(WOLFSSL_STM32F427_RNG) || defined(WOLFSSL_STM32_RNG_NOLIB) + + /* Generate a RNG seed using the hardware RNG on the STM32F427 + * directly, following steps outlined in STM32F4 Reference + * Manual (Chapter 24) for STM32F4xx family. */ + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int ret; + word32 i; + (void)os; + + ret = wolfSSL_CryptHwMutexLock(); + if (ret != 0) { + return ret; + } + + /* enable RNG peripheral clock */ + RCC->AHB2ENR |= RCC_AHB2ENR_RNGEN; + + /* enable RNG interrupt, set IE bit in RNG->CR register */ + RNG->CR |= RNG_CR_IE; + + /* enable RNG, set RNGEN bit in RNG->CR. Activates RNG, + * RNG_LFSR, and error detector */ + RNG->CR |= RNG_CR_RNGEN; + + /* verify no errors, make sure SEIS and CEIS bits are 0 + * in RNG->SR register */ + if (RNG->SR & (RNG_SR_SECS | RNG_SR_CECS)) { + wolfSSL_CryptHwMutexUnLock(); + return RNG_FAILURE_E; + } for (i = 0; i < sz; i++) { /* wait until RNG number is ready */ - while(RNG_GetFlagStatus(RNG_FLAG_DRDY)== RESET) { } + while ((RNG->SR & RNG_SR_DRDY) == 0) { } /* get value */ - output[i] = RNG_GetRandomNumber(); + output[i] = RNG->DR; } + wolfSSL_CryptHwMutexUnLock(); + return 0; } -#elif defined(WOLFSSL_LPC43xx) || defined(WOLFSSL_STM32F2xx) - #warning "write a real random seed!!!!, just for testing now" + #else + /* Generate a RNG seed using the STM32 Standard Peripheral Library */ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { - int i; + int ret; + word32 i; + (void)os; - for (i = 0; i < sz; i++ ) - output[i] = i; + ret = wolfSSL_CryptHwMutexLock(); + if (ret != 0) { + return ret; + } + + /* enable RNG clock source */ + RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_RNG, ENABLE); + + /* reset RNG */ + RNG_DeInit(); + + /* enable RNG peripheral */ + RNG_Cmd(ENABLE); + + /* verify no errors with RNG_CLK or Seed */ + if (RNG_GetFlagStatus(RNG_FLAG_SECS | RNG_FLAG_CECS) != RESET) { + wolfSSL_CryptHwMutexUnLock(); + return RNG_FAILURE_E; + } + + for (i = 0; i < sz; i++) { + /* wait until RNG number is ready */ + while (RNG_GetFlagStatus(RNG_FLAG_DRDY) == RESET) { } + + /* get value */ + output[i] = RNG_GetRandomNumber(); + } + + wolfSSL_CryptHwMutexUnLock(); return 0; } + #endif /* WOLFSSL_STM32_CUBEMX */ #elif defined(WOLFSSL_TIRTOS) @@ -1258,82 +1975,578 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) return 0; } -#elif defined(CUSTOM_RAND_GENERATE) - - /* Implement your own random generation function - * word32 rand_gen(void); - * #define CUSTOM_RAND_GENERATE rand_gen */ +#elif defined(WOLFSSL_PB) int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { word32 i; + for (i = 0; i < sz; i++) + output[i] = UTL_Rand(); (void)os; - for (i = 0; i < sz; i++ ) - output[i] = CUSTOM_RAND_GENERATE(); - return 0; } -#elif defined(NO_DEV_RANDOM) - -#error "you need to write an os specific wc_GenerateSeed() here" +#elif defined(WOLFSSL_NUCLEUS) +#include "nucleus.h" +#include "kernel/plus_common.h" -/* +#warning "potential for not enough entropy, currently being used for testing" int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { + int i; + srand(NU_Get_Time_Stamp()); + + for (i = 0; i < sz; i++ ) { + output[i] = rand() % 256; + if ((i % 8) == 7) { + srand(NU_Get_Time_Stamp()); + } + } + return 0; } -*/ +#elif defined(WOLFSSL_DEOS) && !defined(CUSTOM_RAND_GENERATE) + #include "stdlib.h" + #warning "potential for not enough entropy, currently being used for testing Deos" + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int i; + int seed = XTIME(0); + (void)os; -#else /* !USE_WINDOWS_API && !HAVE_RPT_SYS && !MICRIUM && !NO_DEV_RANDOM */ + for (i = 0; i < sz; i++ ) { + output[i] = rand_r(&seed) % 256; + if ((i % 8) == 7) { + seed = XTIME(0); + rand_r(&seed); + } + } -/* may block */ -int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) -{ - int ret = 0; + return 0; + } +#elif defined(WOLFSSL_VXWORKS) + #include <randomNumGen.h> + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) { + STATUS status; + + #ifdef VXWORKS_SIM + /* cannot generate true entropy with VxWorks simulator */ + #warning "not enough entropy, simulator for testing only" + int i = 0; + + for (i = 0; i < 1000; i++) { + randomAddTimeStamp(); + } + #endif + + status = randBytes (output, sz); + if (status == ERROR) { + return RNG_FAILURE_E; + } -#if defined(HAVE_INTEL_RDGEN) && (defined(HAVE_HASHDRBG) || defined(NO_RC4)) - wc_InitRng_IntelRD() ; /* set cpuid_flags if not yet */ - if(IS_INTEL_RDSEED) - return wc_GenerateSeed_IntelRD(NULL, output, sz) ; + return 0; + } + +#elif defined(WOLFSSL_NRF51) + #include "app_error.h" + #include "nrf_drv_rng.h" + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int remaining = sz, length, pos = 0; + uint8_t available; + uint32_t err_code; + + (void)os; + + /* Make sure RNG is running */ + err_code = nrf_drv_rng_init(NULL); + if (err_code != NRF_SUCCESS && err_code != NRF_ERROR_INVALID_STATE) { + return -1; + } + + while (remaining > 0) { + err_code = nrf_drv_rng_bytes_available(&available); + if (err_code == NRF_SUCCESS) { + length = (remaining < available) ? remaining : available; + if (length > 0) { + err_code = nrf_drv_rng_rand(&output[pos], length); + remaining -= length; + pos += length; + } + } + + if (err_code != NRF_SUCCESS) { + break; + } + } + + return (err_code == NRF_SUCCESS) ? 0 : -1; + } + +#elif defined(HAVE_WNR) + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + if (os == NULL || output == NULL || wnr_ctx == NULL || + wnr_timeout < 0) { + return BAD_FUNC_ARG; + } + + if (wnr_mutex_init == 0) { + WOLFSSL_MSG("netRandom context must be created before use"); + return RNG_FAILURE_E; + } + + if (wc_LockMutex(&wnr_mutex) != 0) { + WOLFSSL_MSG("Bad Lock Mutex wnr_mutex\n"); + return BAD_MUTEX_E; + } + + if (wnr_get_entropy(wnr_ctx, wnr_timeout, output, sz, sz) != + WNR_ERROR_NONE) + return RNG_FAILURE_E; + + wc_UnLockMutex(&wnr_mutex); + + return 0; + } + +#elif defined(WOLFSSL_ATMEL) + #include <wolfssl/wolfcrypt/port/atmel/atmel.h> + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int ret = 0; + + (void)os; + if (output == NULL) { + return BUFFER_E; + } + + ret = atmel_get_random_number(sz, output); + + return ret; + } + +#elif defined(INTIME_RTOS) + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int ret = 0; + + (void)os; + + if (output == NULL) { + return BUFFER_E; + } + + /* Note: Investigate better solution */ + /* no return to check */ + arc4random_buf(output, sz); + + return ret; + } + +#elif defined(WOLFSSL_WICED) + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int ret; + (void)os; + + if (output == NULL || UINT16_MAX < sz) { + return BUFFER_E; + } + + if ((ret = wiced_crypto_get_random((void*) output, sz) ) + != WICED_SUCCESS) { + return ret; + } + + return ret; + } + +#elif defined(WOLFSSL_NETBURNER) + #warning using NetBurner pseudo random GetRandomByte for seed + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + word32 i; + (void)os; + + if (output == NULL) { + return BUFFER_E; + } + + for (i = 0; i < sz; i++) { + output[i] = GetRandomByte(); + + /* check if was a valid random number */ + if (!RandomValid()) + return RNG_FAILURE_E; + } + + return 0; + } +#elif defined(IDIRECT_DEV_RANDOM) + + extern int getRandom( int sz, unsigned char *output ); + + int GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int num_bytes_returned = 0; + + num_bytes_returned = getRandom( (int) sz, (unsigned char *) output ); + + return 0; + } + +#elif (defined(WOLFSSL_IMX6_CAAM) || defined(WOLFSSL_IMX6_CAAM_RNG)) + + #include <wolfssl/wolfcrypt/port/caam/wolfcaam.h> + #include <wolfssl/wolfcrypt/port/caam/caam_driver.h> + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + Buffer buf[1]; + int ret = 0; + int times = 1000, i; + + (void)os; + + if (output == NULL) { + return BUFFER_E; + } + + buf[0].BufferType = DataBuffer | LastBuffer; + buf[0].TheAddress = (Address)output; + buf[0].Length = sz; + + /* Check Waiting to make sure entropy is ready */ + for (i = 0; i < times; i++) { + ret = wc_caamAddAndWait(buf, NULL, CAAM_ENTROPY); + if (ret == Success) { + break; + } + + /* driver could be waiting for entropy */ + if (ret != RAN_BLOCK_E) { + return ret; + } + usleep(100); + } + + if (i == times && ret != Success) { + return RNG_FAILURE_E; + } + else { /* Success case */ + ret = 0; + } + + return ret; + } + +#elif defined(WOLFSSL_APACHE_MYNEWT) + + #include <stdlib.h> + #include "os/os_time.h" + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int i; + srand(os_time_get()); + + for (i = 0; i < sz; i++ ) { + output[i] = rand() % 256; + if ((i % 8) == 7) { + srand(os_time_get()); + } + } + + return 0; + } + +#elif defined(WOLFSSL_ESPIDF) + #if defined(WOLFSSL_ESPWROOM32) || defined(WOLFSSL_ESPWROOM32SE) + #include <esp_system.h> + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + word32 rand; + while (sz > 0) { + word32 len = sizeof(rand); + if (sz < len) + len = sz; + /* Get one random 32-bit word from hw RNG */ + rand = esp_random( ); + XMEMCPY(output, &rand, len); + output += len; + sz -= len; + } + + return 0; + } + #endif /* end WOLFSSL_ESPWROOM32 */ + +#elif defined(WOLFSSL_RENESAS_TSIP) +#if defined(WOLFSSL_RENESA_TSIP_IAREWRX) + #include "r_bsp/mcu/all/r_rx_compiler.h" #endif + #include "r_bsp/platform.h" + #include "r_tsip_rx_if.h" + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int ret; + uint32_t buffer[4]; + + while (sz > 0) { + uint32_t len = sizeof(buffer); + + if (sz < len) { + len = sz; + } + /* return 4 words random number*/ + ret = R_TSIP_GenerateRandomNumber(buffer); + if(ret == TSIP_SUCCESS) { + XMEMCPY(output, &buffer, len); + output += len; + sz -= len; + } else + return ret; + } + return ret; + } - os->fd = open("/dev/urandom",O_RDONLY); - if (os->fd == -1) { - /* may still have /dev/random */ - os->fd = open("/dev/random",O_RDONLY); - if (os->fd == -1) - return OPEN_RAN_E; +#elif defined(WOLFSSL_SCE) && !defined(WOLFSSL_SCE_NO_TRNG) + #include "hal_data.h" + + #ifndef WOLFSSL_SCE_TRNG_HANDLE + #define WOLFSSL_SCE_TRNG_HANDLE g_sce_trng + #endif + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + uint32_t ret; + uint32_t blocks; + word32 len = sz; + + ret = WOLFSSL_SCE_TRNG_HANDLE.p_api->open(WOLFSSL_SCE_TRNG_HANDLE.p_ctrl, + WOLFSSL_SCE_TRNG_HANDLE.p_cfg); + if (ret != SSP_SUCCESS && ret != SSP_ERR_CRYPTO_ALREADY_OPEN) { + /* error opening TRNG driver */ + return -1; + } + + blocks = sz / sizeof(uint32_t); + if (blocks > 0) { + ret = WOLFSSL_SCE_TRNG_HANDLE.p_api->read(WOLFSSL_SCE_TRNG_HANDLE.p_ctrl, + (uint32_t*)output, blocks); + if (ret != SSP_SUCCESS) { + return -1; + } + } + + len = len - (blocks * sizeof(uint32_t)); + if (len > 0) { + uint32_t tmp; + + if (len > sizeof(uint32_t)) { + return -1; + } + ret = WOLFSSL_SCE_TRNG_HANDLE.p_api->read(WOLFSSL_SCE_TRNG_HANDLE.p_ctrl, + (uint32_t*)tmp, 1); + if (ret != SSP_SUCCESS) { + return -1; + } + XMEMCPY(output + (blocks * sizeof(uint32_t)), (byte*)&tmp, len); + } + + ret = WOLFSSL_SCE_TRNG_HANDLE.p_api->close(WOLFSSL_SCE_TRNG_HANDLE.p_ctrl); + if (ret != SSP_SUCCESS) { + /* error opening TRNG driver */ + return -1; + } + return 0; } +#elif defined(CUSTOM_RAND_GENERATE_BLOCK) + /* #define CUSTOM_RAND_GENERATE_BLOCK myRngFunc + * extern int myRngFunc(byte* output, word32 sz); + */ - while (sz) { - int len = (int)read(os->fd, output, sz); - if (len == -1) { - ret = READ_RAN_E; - break; +#elif defined(WOLFSSL_SAFERTOS) || defined(WOLFSSL_LEANPSK) || \ + defined(WOLFSSL_IAR_ARM) || defined(WOLFSSL_MDK_ARM) || \ + defined(WOLFSSL_uITRON4) || defined(WOLFSSL_uTKERNEL2) || \ + defined(WOLFSSL_LPC43xx) || defined(WOLFSSL_STM32F2xx) || \ + defined(MBED) || defined(WOLFSSL_EMBOS) || \ + defined(WOLFSSL_GENSEED_FORTEST) || defined(WOLFSSL_CHIBIOS) || \ + defined(WOLFSSL_CONTIKI) || defined(WOLFSSL_AZSPHERE) + + /* these platforms do not have a default random seed and + you'll need to implement your own wc_GenerateSeed or define via + CUSTOM_RAND_GENERATE_BLOCK */ + + #define USE_TEST_GENSEED + +#elif defined(WOLFSSL_ZEPHYR) + + #include <entropy.h> + #ifndef _POSIX_C_SOURCE + #include <posix/time.h> + #else + #include <sys/time.h> + #endif + + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int ret = 0; + word32 rand; + while (sz > 0) { + word32 len = sizeof(rand); + if (sz < len) + len = sz; + rand = sys_rand32_get(); + XMEMCPY(output, &rand, len); + output += len; + sz -= len; + } + + return ret; + } + +#elif defined(WOLFSSL_TELIT_M2MB) + + #include "stdlib.h" + static long get_timestamp(void) { + long myTime = 0; + INT32 fd = m2mb_rtc_open("/dev/rtc0", 0); + if (fd >= 0) { + M2MB_RTC_TIMEVAL_T timeval; + m2mb_rtc_ioctl(fd, M2MB_RTC_IOCTL_GET_TIMEVAL, &timeval); + myTime = timeval.msec; + m2mb_rtc_close(fd); + } + return myTime; + } + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int i; + srand(get_timestamp()); + for (i = 0; i < sz; i++ ) { + output[i] = rand() % 256; + if ((i % 8) == 7) { + srand(get_timestamp()); + } + } + return 0; } - sz -= len; - output += len; +#elif defined(NO_DEV_RANDOM) + + #error "you need to write an os specific wc_GenerateSeed() here" + + /* + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + return 0; + } + */ - if (sz) { -#ifdef BLOCKING - sleep(0); /* context switch */ #else - ret = RAN_BLOCK_E; - break; -#endif + + /* may block */ + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + int ret = 0; + + if (os == NULL) { + return BAD_FUNC_ARG; } + + #ifdef WOLF_CRYPTO_CB + if (os->devId != INVALID_DEVID) { + ret = wc_CryptoCb_RandomSeed(os, output, sz); + if (ret != CRYPTOCB_UNAVAILABLE) + return ret; + /* fall-through when unavailable */ + ret = 0; /* reset error code */ + } + #endif + + #ifdef HAVE_INTEL_RDSEED + if (IS_INTEL_RDSEED(intel_flags)) { + ret = wc_GenerateSeed_IntelRD(NULL, output, sz); + if (ret == 0) { + /* success, we're done */ + return ret; + } + #ifdef FORCE_FAILURE_RDSEED + /* don't fallback to /dev/urandom */ + return ret; + #else + /* reset error and fallback to using /dev/urandom */ + ret = 0; + #endif + } + #endif /* HAVE_INTEL_RDSEED */ + + #ifndef NO_DEV_URANDOM /* way to disable use of /dev/urandom */ + os->fd = open("/dev/urandom", O_RDONLY); + if (os->fd == -1) + #endif + { + /* may still have /dev/random */ + os->fd = open("/dev/random", O_RDONLY); + if (os->fd == -1) + return OPEN_RAN_E; + } + + while (sz) { + int len = (int)read(os->fd, output, sz); + if (len == -1) { + ret = READ_RAN_E; + break; + } + + sz -= len; + output += len; + + if (sz) { + #if defined(BLOCKING) || defined(WC_RNG_BLOCKING) + sleep(0); /* context switch */ + #else + ret = RAN_BLOCK_E; + break; + #endif + } + } + close(os->fd); + + return ret; } - close(os->fd); - return ret; -} +#endif -#endif /* USE_WINDOWS_API */ -#endif /* HAVE_FIPS */ +#ifdef USE_TEST_GENSEED + #ifndef _MSC_VER + #warning "write a real random seed!!!!, just for testing now" + #else + #pragma message("Warning: write a real random seed!!!!, just for testing now") + #endif + int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz) + { + word32 i; + for (i = 0; i < sz; i++ ) + output[i] = i; + + (void)os; + return 0; + } +#endif + + +/* End wc_GenerateSeed */ +#endif /* WC_NO_RNG */ +#endif /* HAVE_FIPS */ |