diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cc310/cc310_backend_rng.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cc310/cc310_backend_rng.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cc310/cc310_backend_rng.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cc310/cc310_backend_rng.c new file mode 100644 index 0000000..25fd96e --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/cc310/cc310_backend_rng.c @@ -0,0 +1,272 @@ +/** + * Copyright (c) 2018 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "sdk_common.h" + +#if NRF_MODULE_ENABLED(NRF_CRYPTO) +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310) +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_RNG) + +#include "nrf_crypto_error.h" +#include "nrf_log.h" +#include "cc310_backend_mutex.h" +#include "cc310_backend_rng.h" +#include "crys_rnd.h" +#include "crys_rnd_error.h" +#include "cc310_backend_shared.h" + +static ret_code_t result_get(CRYSError_t err_code) +{ + ret_code_t ret_val; + + switch (err_code) + { + case CRYS_OK: + ret_val = NRF_SUCCESS; + break; + + case CRYS_RND_ILLEGAL_PARAMETER_ERROR: + ret_val = NRF_ERROR_CRYPTO_INVALID_PARAM; + break; + + case CRYS_RND_INIT_FAILED: + case CRYS_RND_STARTUP_FAILED: + case CRYS_RND_INSTANTIATION_ERROR: + ret_val = NRF_ERROR_CRYPTO_RNG_INIT_FAILED; + break; + + case CRYS_RND_IS_NOT_SUPPORTED: + case CRYS_RND_CAN_NOT_GENERATE_RAND_IN_RANGE: + case CRYS_RND_TRNG_KAT_NOT_SUPPORTED_ERROR: + case CRYS_RND_SRAM_NOT_SUPPORTED_ERROR: + case CRYS_RND_OPERATION_IS_NOT_SUPPORTED_ERROR: + ret_val = NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE; + break; + + case CRYS_RND_DATA_OUT_POINTER_INVALID_ERROR: + case CRYS_RND_VECTOR_OUT_PTR_ERROR: + ret_val = NRF_ERROR_CRYPTO_OUTPUT_NULL; + break; + + case CRYS_RND_ADDITIONAL_INPUT_BUFFER_NULL: + case CRYS_RND_WORK_BUFFER_PTR_INVALID_ERROR: + case CRYS_RND_ILLEGAL_DATA_PTR_ERROR: + ret_val = NRF_ERROR_CRYPTO_INPUT_NULL; + break; + + case CRYS_RND_DATA_SIZE_OVERFLOW_ERROR: + case CRYS_RND_ADDITIONAL_INPUT_SIZE_ERROR: + case CRYS_RND_ILLEGAL_DATA_SIZE_ERROR: + case CRYS_RND_MAX_VECTOR_IS_TOO_SMALL_ERROR: + ret_val = NRF_ERROR_CRYPTO_INPUT_LENGTH; + break; + + case CRYS_RND_ILLEGAL_AES_KEY_SIZE_ERROR: + case CRYS_RND_VECTOR_OUT_SIZE_ERROR: + case CRYS_RND_VECTOR_SIZE_ERROR: + ret_val = NRF_ERROR_CRYPTO_OUTPUT_LENGTH; + break; + + case CRYS_RND_CONTEXT_PTR_INVALID_ERROR: + case CRYS_RND_STATE_PTR_INVALID_ERROR: + ret_val = NRF_ERROR_CRYPTO_CONTEXT_NULL; + break; + + case CRYS_RND_INSTANTIATION_NOT_DONE_ERROR: + ret_val = NRF_ERROR_CRYPTO_CONTEXT_NOT_INITIALIZED; + break; + + case CRYS_RND_RESEED_COUNTER_OVERFLOW_ERROR: + ret_val = NRF_ERROR_CRYPTO_RNG_RESEED_REQUIRED; + break; + + case CRYS_RND_CPRNG_TEST_FAIL_ERROR: + case CRYS_RND_TRNG_LOSS_SAMPLES_ERROR: + case CRYS_RND_TRNG_TIME_EXCEED_ERROR: + case CRYS_RND_TRNG_LOSS_SAMPLES_AND_TIME_EXCEED_ERROR: + case CRYS_RND_IS_KAT_MODE_ERROR: + case CRYS_RND_STATE_VALIDATION_TAG_ERROR: + case CRYS_RND_GEN_VECTOR_FUNC_ERROR: + case CRYS_RND_TRNG_ERRORS_ERROR: + case CRYS_RND_KAT_DATA_PARAMS_ERROR: + case CRYS_RND_AES_ERROR: + default: + ret_val = NRF_ERROR_CRYPTO_INTERNAL; + break; + } + return ret_val; +} + + +ret_code_t nrf_crypto_rng_backend_init(void * const p_context, + void * const p_temp_buffer) +{ + bool mutex_locked; + CRYSError_t err_code; + ret_code_t ret_val; + CRYS_RND_WorkBuff_t * p_work_buffer = (CRYS_RND_WorkBuff_t *)p_temp_buffer; + nrf_crypto_backend_rng_context_t * p_ctx = (nrf_crypto_backend_rng_context_t *)p_context; + + // Save time by not reinitializing an already valid CC310 RNG context. + // (Useful for example in case the context was stored in retained memory during system OFF.) + if (p_ctx->header.init_value == NRF_CRYPTO_RNG_CONTEXT_INIT_MAGIC_VALUE) + { + return NRF_SUCCESS; + } + + mutex_locked = cc310_backend_mutex_trylock(); + VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY); + + cc310_backend_enable(); + + err_code = CRYS_RndInit(&p_ctx->crys_rnd_state, p_work_buffer); + ret_val = result_get(err_code); + + cc310_backend_disable(); + + cc310_backend_mutex_unlock(); + + return ret_val; +} + + +ret_code_t nrf_crypto_rng_backend_uninit(void * const p_context) +{ + bool mutex_locked; + CRYSError_t err_code; + ret_code_t ret_val; + CRYS_RND_State_t * p_crys_rnd_state = + &((nrf_crypto_backend_rng_context_t *)p_context)->crys_rnd_state; + + + mutex_locked = cc310_backend_mutex_trylock(); + VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY); + + cc310_backend_enable(); + + err_code = CRYS_RND_UnInstantiation(p_crys_rnd_state); + + cc310_backend_disable(); + + ret_val = result_get(err_code); + + cc310_backend_mutex_unlock(); + + return ret_val; +} + + +ret_code_t nrf_crypto_rng_backend_vector_generate(void * const p_context, + uint8_t * const p_target, + size_t size, + bool use_mutex) +{ + bool mutex_locked; + CRYSError_t err_code; + ret_code_t ret_val; + CRYS_RND_State_t * p_crys_rnd_state = + &((nrf_crypto_backend_rng_context_t *)p_context)->crys_rnd_state; + + if (use_mutex) + { + mutex_locked = cc310_backend_mutex_trylock(); + VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY); + } + + cc310_backend_enable(); + + err_code = CRYS_RND_GenerateVector(p_crys_rnd_state, size, p_target); + + cc310_backend_disable(); + + ret_val = result_get(err_code); + + if (use_mutex) + { + cc310_backend_mutex_unlock(); + } + + return ret_val; +} + + +ret_code_t nrf_crypto_rng_backend_reseed(void * const p_context, + void * p_temp_buffer, + uint8_t * p_input_data, + size_t size) +{ + bool mutex_locked; + CRYSError_t err_code; + ret_code_t ret_val = NRF_SUCCESS; + CRYS_RND_WorkBuff_t * p_work_buffer = (CRYS_RND_WorkBuff_t *)p_temp_buffer; + CRYS_RND_State_t * p_crys_rnd_state = + &((nrf_crypto_backend_rng_context_t *)p_context)->crys_rnd_state; + + VERIFY_TRUE(size <= CRYS_RND_ADDITINAL_INPUT_MAX_SIZE_WORDS, NRF_ERROR_CRYPTO_INPUT_LENGTH); + VERIFY_TRUE((size & 0x3) == 0, NRF_ERROR_CRYPTO_INTERNAL); + + mutex_locked = cc310_backend_mutex_trylock(); + VERIFY_TRUE(mutex_locked, NRF_ERROR_CRYPTO_BUSY); + + cc310_backend_enable(); + + if (size > 0) + { + err_code = CRYS_RND_AddAdditionalInput(p_crys_rnd_state, p_input_data, size); + ret_val = result_get(err_code); + if (ret_val != NRF_SUCCESS) + { + goto exit; + } + } + + err_code = CRYS_RND_Reseeding(p_crys_rnd_state, p_work_buffer); + ret_val = result_get(err_code); + +exit: + cc310_backend_disable(); + cc310_backend_mutex_unlock(); + return ret_val; +} + + +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310_RNG) +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_CC310) +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) |