diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/oberon/oberon_backend_ecc.c')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/oberon/oberon_backend_ecc.c | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/oberon/oberon_backend_ecc.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/oberon/oberon_backend_ecc.c new file mode 100644 index 0000000..ed8f510 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/crypto/backend/oberon/oberon_backend_ecc.c @@ -0,0 +1,458 @@ +/** + * 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_config.h" +#include "nordic_common.h" + +#if NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON) + +#include <stdbool.h> +#include <string.h> +#include <stddef.h> + +#include "app_util.h" +#include "nrf_crypto_ecc.h" +#include "nrf_crypto_mem.h" +#include "nrf_crypto_rng.h" +#include "nrf_crypto_shared.h" +#include "oberon_backend_ecc.h" + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1) +#include "occ_ecdh_p256.h" +#endif +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519) +#include "occ_curve25519.h" +#endif +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_ED25519) +#include "occ_ed25519.h" +#endif + + +/** @internal @brief Structure holding private key common to all curves implemented by the Oberon. + */ +typedef struct +{ + nrf_crypto_internal_ecc_key_header_t header; /**< @internal @brief Common ECC key header. */ + uint8_t key[32]; /**< @internal @brief Raw key. */ +} nrf_crypto_backend_oberon_private_key_t; + + +/** @internal @brief Structure holding public key common to all curves implemented by the Oberon. + */ +typedef struct +{ + nrf_crypto_internal_ecc_key_header_t header; /**< @internal @brief Common ECC key header. */ + uint8_t key[64]; /**< @internal @brief Raw key. */ +} nrf_crypto_backend_oberon_public_key_t; + + +/** @internal @brief Function to hold copy function (can be simple mem copy or copy with endian swap). + */ +typedef void (*copy_fn_t)(void * p_dest, void const * p_src, size_t size); + + +ret_code_t nrf_crypto_backend_oberon_private_key_to_raw( + void const * p_private_key, + uint8_t * p_raw_data) +{ + nrf_crypto_backend_oberon_private_key_t const * p_prv = + (nrf_crypto_backend_oberon_private_key_t const *)p_private_key; + + //lint -save -e611 (Suspicious cast) + copy_fn_t copy_fn = (copy_fn_t)p_prv->header.p_info->p_backend_data; + //lint -restore + + copy_fn(p_raw_data, p_prv->key, p_prv->header.p_info->raw_private_key_size); + + return NRF_SUCCESS; +} + + +ret_code_t nrf_crypto_backend_oberon_public_key_from_raw( + void * p_public_key, + uint8_t const * p_raw_data) +{ + nrf_crypto_backend_oberon_public_key_t * p_pub = + (nrf_crypto_backend_oberon_public_key_t *)p_public_key; + + //lint -save -e611 (Suspicious cast) + copy_fn_t copy_fn = (copy_fn_t)p_pub->header.p_info->p_backend_data; + //lint -restore + + copy_fn(p_pub->key, p_raw_data, p_pub->header.p_info->raw_public_key_size); + + return NRF_SUCCESS; +} + + +ret_code_t nrf_crypto_backend_oberon_public_key_to_raw( + void const * p_public_key, + uint8_t * p_raw_data) +{ + nrf_crypto_backend_oberon_public_key_t const * p_pub = + (nrf_crypto_backend_oberon_public_key_t const *)p_public_key; + + //lint -save -e611 (Suspicious cast) + copy_fn_t copy_fn = (copy_fn_t)p_pub->header.p_info->p_backend_data; + //lint -restore + + copy_fn(p_raw_data, p_pub->key, p_pub->header.p_info->raw_public_key_size); + + return NRF_SUCCESS; +} + + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1) \ + || NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519) + + +ret_code_t nrf_crypto_backend_oberon_private_key_from_raw( + void * p_private_key, + uint8_t const * p_raw_data) +{ + nrf_crypto_backend_oberon_private_key_t * p_prv = + (nrf_crypto_backend_oberon_private_key_t *)p_private_key; + + //lint -save -e611 (Suspicious cast) + copy_fn_t copy_fn = (copy_fn_t)p_prv->header.p_info->p_backend_data; + //lint -restore + + copy_fn(p_prv->key, p_raw_data, p_prv->header.p_info->raw_private_key_size); + + return NRF_SUCCESS; +} + + +#endif //NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1) || NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519) + + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519) \ + || NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_ED25519) + + +static ret_code_t oberon_vector_generate(uint8_t * p_data, size_t size) +{ +#if defined(NRF_CRYPTO_RNG_ENABLED) && (NRF_CRYPTO_RNG_ENABLED == 1) + + return nrf_crypto_rng_vector_generate(p_data, size); + +#elif defined(NRF_CRYPTO_RNG_ENABLED) && (NRF_CRYPTO_RNG_ENABLED == 0) + + return NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE; + +#else + + #warning NRF_CRYPTO_RNG_ENABLED define not found in sdk_config.h (Is the sdk_config.h valid?). + +#endif +} + + +#endif //NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519) || NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_ED25519) + + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1) + + +// Make sure that common key structure match secp256r1 key structure to safely cast types. +STATIC_ASSERT(offsetof(nrf_crypto_backend_oberon_private_key_t, key) == + offsetof(nrf_crypto_backend_secp256r1_private_key_t, key), + "Common Oberon private key structure does not match secp256r1 one."); +STATIC_ASSERT(offsetof(nrf_crypto_backend_oberon_public_key_t, key) == + offsetof(nrf_crypto_backend_secp256r1_public_key_t, key), + "Common Oberon public key structure does not match secp256r1 one."); + + +ret_code_t nrf_crypto_backend_oberon_ecc_secp256r1_rng(uint8_t data[32]) +{ +#if NRF_MODULE_ENABLED(NRF_CRYPTO_RNG) + + static const uint8_t min_value[32] = + { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, + }; + static const uint8_t max_value[32] = + { + 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84, 0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x50, + }; + return nrf_crypto_rng_vector_generate_in_range(data, min_value, max_value, 32); + +#else + return NRF_ERROR_CRYPTO_FEATURE_UNAVAILABLE; +#endif +} + + +ret_code_t nrf_crypto_backend_secp256r1_key_pair_generate( + void * p_context, + void * p_private_key, + void * p_public_key) +{ + int result; + + nrf_crypto_backend_secp256r1_private_key_t * p_prv = + (nrf_crypto_backend_secp256r1_private_key_t *)p_private_key; + + nrf_crypto_backend_secp256r1_public_key_t * p_pub = + (nrf_crypto_backend_secp256r1_public_key_t *)p_public_key; + + result = nrf_crypto_backend_oberon_ecc_secp256r1_rng(p_prv->key); + + if (result != NRF_SUCCESS) + { + return result; + } + + result = occ_ecdh_p256_public_key(p_pub->key, p_prv->key); + + if (result != 0) + { + return NRF_ERROR_CRYPTO_INTERNAL; + } + return NRF_SUCCESS; +} + + +ret_code_t nrf_crypto_backend_secp256r1_public_key_calculate( + void * p_context, + void const * p_private_key, + void * p_public_key) +{ + int result; + + nrf_crypto_backend_secp256r1_private_key_t const * p_prv = + (nrf_crypto_backend_secp256r1_private_key_t const *)p_private_key; + + nrf_crypto_backend_secp256r1_public_key_t * p_pub = + (nrf_crypto_backend_secp256r1_public_key_t *)p_public_key; + + result = occ_ecdh_p256_public_key(p_pub->key, p_prv->key); + + if (result != 0) + { + return NRF_ERROR_CRYPTO_INTERNAL; + } + return NRF_SUCCESS; +} + + +const nrf_crypto_ecc_curve_info_t g_nrf_crypto_ecc_secp256r1_curve_info = +{ + .public_key_size = sizeof(nrf_crypto_backend_secp256r1_public_key_t), + .private_key_size = sizeof(nrf_crypto_backend_secp256r1_private_key_t), + .curve_type = NRF_CRYPTO_ECC_SECP256R1_CURVE_TYPE, + .raw_private_key_size = NRF_CRYPTO_ECC_SECP256R1_RAW_PRIVATE_KEY_SIZE, + .raw_public_key_size = NRF_CRYPTO_ECC_SECP256R1_RAW_PUBLIC_KEY_SIZE, + //lint -save -e611 -e546 (Suspicious cast, Suspicious use of &) + .p_backend_data = (void *)&memcpy, + //lint -restore +}; + + +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_SECP256R1) + + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519) + + +// Make sure that common key structure match Curve25519 key structure to safely cast types. +STATIC_ASSERT(offsetof(nrf_crypto_backend_oberon_private_key_t, key) == + offsetof(nrf_crypto_backend_curve25519_private_key_t, key), + "Common Oberon private key structure does not match Curve25519 one."); +STATIC_ASSERT(offsetof(nrf_crypto_backend_oberon_public_key_t, key) == + offsetof(nrf_crypto_backend_curve25519_public_key_t, key), + "Common Oberon public key structure does not match Curve25519 one."); + + +ret_code_t nrf_crypto_backend_curve25519_key_pair_generate( + void * p_context, + void * p_private_key, + void * p_public_key) +{ + ret_code_t result; + + nrf_crypto_backend_curve25519_private_key_t * p_prv = + (nrf_crypto_backend_curve25519_private_key_t *)p_private_key; + + nrf_crypto_backend_curve25519_public_key_t * p_pub = + (nrf_crypto_backend_curve25519_public_key_t *)p_public_key; + + result = oberon_vector_generate(p_prv->key, sizeof(p_prv->key)); + + if (result != NRF_SUCCESS) + { + return result; + } + + p_prv->key[0] &= 0xF8; // Private key is multiply of 8 (by definition), so lower 3 bits are 0. + p_prv->key[31] &= 0x7F; // Highest bit has to be 0, because private key is 255-bit long. + p_prv->key[31] |= 0x40; // Bit 254 has to be 1 (by definition) + + occ_curve25519_scalarmult_base(p_pub->key, p_prv->key); + + return NRF_SUCCESS; +} + + +ret_code_t nrf_crypto_backend_curve25519_public_key_calculate( + void * p_context, + void const * p_private_key, + void * p_public_key) +{ + nrf_crypto_backend_curve25519_private_key_t * p_prv = + (nrf_crypto_backend_curve25519_private_key_t *)p_private_key; + + nrf_crypto_backend_curve25519_public_key_t * p_pub = + (nrf_crypto_backend_curve25519_public_key_t *)p_public_key; + + // Private key bit fixing is done inside Oberon library. + occ_curve25519_scalarmult_base(p_pub->key, p_prv->key); + + return NRF_SUCCESS; +} + + +const nrf_crypto_ecc_curve_info_t g_nrf_crypto_ecc_curve25519_curve_info = +{ + .public_key_size = sizeof(nrf_crypto_backend_curve25519_public_key_t), + .private_key_size = sizeof(nrf_crypto_backend_curve25519_private_key_t), + .curve_type = NRF_CRYPTO_ECC_CURVE25519_CURVE_TYPE, + .raw_private_key_size = NRF_CRYPTO_ECC_CURVE25519_RAW_PRIVATE_KEY_SIZE, + .raw_public_key_size = NRF_CRYPTO_ECC_CURVE25519_RAW_PUBLIC_KEY_SIZE, + //lint -save -e611 -e546 (Suspicious cast, Suspicious use of &) + .p_backend_data = (void *)&nrf_crypto_internal_swap_endian, + //lint -restore +}; + + +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_CURVE25519) + + +#if NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_ED25519) + + +// Make sure that common key structure match Ed25519 key structure to safely cast types. +STATIC_ASSERT(offsetof(nrf_crypto_backend_oberon_private_key_t, key) == + offsetof(nrf_crypto_backend_ed25519_private_key_t, private_part), + "Common Oberon private key structure does not match Ed25519 one."); +STATIC_ASSERT(offsetof(nrf_crypto_backend_oberon_public_key_t, key) == + offsetof(nrf_crypto_backend_ed25519_public_key_t, key), + "Common Oberon public key structure does not match Ed25519 one."); + + +ret_code_t nrf_crypto_backend_ed25519_private_key_from_raw( + void * p_private_key, + uint8_t const * p_raw_data) +{ + nrf_crypto_backend_ed25519_private_key_t * p_prv = + (nrf_crypto_backend_ed25519_private_key_t *)p_private_key; + + memcpy(p_prv->private_part, p_raw_data, sizeof(p_prv->private_part)); + + occ_ed25519_public_key(p_prv->public_part, p_prv->private_part); + + return NRF_SUCCESS; +} + + +ret_code_t nrf_crypto_backend_ed25519_key_pair_generate( + void * p_context, + void * p_private_key, + void * p_public_key) +{ + ret_code_t result; + + nrf_crypto_backend_ed25519_private_key_t * p_prv = + (nrf_crypto_backend_ed25519_private_key_t *)p_private_key; + + nrf_crypto_backend_ed25519_public_key_t * p_pub = + (nrf_crypto_backend_ed25519_public_key_t *)p_public_key; + + result = oberon_vector_generate(p_prv->private_part, sizeof(p_prv->private_part)); + + if (result != NRF_SUCCESS) + { + return result; + } + + occ_ed25519_public_key(p_prv->public_part, p_prv->private_part); + + memcpy(p_pub->key, p_prv->public_part, sizeof(p_pub->key)); + + return NRF_SUCCESS; +} + + +ret_code_t nrf_crypto_backend_ed25519_public_key_calculate( + void * p_context, + void const * p_private_key, + void * p_public_key) +{ + nrf_crypto_backend_ed25519_private_key_t * p_prv = + (nrf_crypto_backend_ed25519_private_key_t *)p_private_key; + + nrf_crypto_backend_ed25519_public_key_t * p_pub = + (nrf_crypto_backend_ed25519_public_key_t *)p_public_key; + + memcpy(p_pub->key, p_prv->public_part, sizeof(p_pub->key)); + + return NRF_SUCCESS; +} + + +const nrf_crypto_ecc_curve_info_t g_nrf_crypto_ecc_ed25519_curve_info = +{ + .public_key_size = sizeof(nrf_crypto_backend_ed25519_public_key_t), + .private_key_size = sizeof(nrf_crypto_backend_ed25519_private_key_t), + .curve_type = NRF_CRYPTO_ECC_ED25519_CURVE_TYPE, + .raw_private_key_size = NRF_CRYPTO_ECC_ED25519_RAW_PRIVATE_KEY_SIZE, + .raw_public_key_size = NRF_CRYPTO_ECC_ED25519_RAW_PUBLIC_KEY_SIZE, + //lint -save -e611 -e546 (Suspicious cast, Suspicious use of &) + .p_backend_data = (void *)&memcpy, + //lint -restore +}; + + +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON_ECC_ED25519) + + +#endif // NRF_MODULE_ENABLED(NRF_CRYPTO) && NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_OBERON) |