| /* |
| * Copyright (c) 2021, The OpenThread Authors. |
| * 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 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 the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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. |
| */ |
| |
| /** |
| * @file |
| * This file implements the Crypto platform callbacks into OpenThread and default/weak Crypto platform APIs. |
| */ |
| |
| #include "openthread-core-config.h" |
| |
| #include <string.h> |
| |
| #include <mbedtls/aes.h> |
| #include <mbedtls/cmac.h> |
| #include <mbedtls/ctr_drbg.h> |
| #include <mbedtls/ecdsa.h> |
| #include <mbedtls/entropy.h> |
| #include <mbedtls/md.h> |
| #include <mbedtls/pk.h> |
| #include <mbedtls/sha256.h> |
| #include <mbedtls/version.h> |
| |
| #include <openthread/instance.h> |
| #include <openthread/platform/crypto.h> |
| #include <openthread/platform/entropy.h> |
| #include <openthread/platform/time.h> |
| |
| #include "common/code_utils.hpp" |
| #include "common/debug.hpp" |
| #include "common/instance.hpp" |
| #include "common/new.hpp" |
| #include "config/crypto.h" |
| #include "crypto/ecdsa.hpp" |
| #include "crypto/hmac_sha256.hpp" |
| #include "crypto/storage.hpp" |
| |
| using namespace ot; |
| using namespace Crypto; |
| |
| #if OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_MBEDTLS |
| |
| //--------------------------------------------------------------------------------------------------------------------- |
| // Default/weak implementation of crypto platform APIs |
| |
| #if (!defined(MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES) && \ |
| (!defined(MBEDTLS_NO_PLATFORM_ENTROPY) || defined(MBEDTLS_HAVEGE_C) || defined(MBEDTLS_ENTROPY_HARDWARE_ALT))) |
| #define OT_MBEDTLS_STRONG_DEFAULT_ENTROPY_PRESENT |
| #endif |
| |
| #if !OPENTHREAD_RADIO |
| static mbedtls_ctr_drbg_context sCtrDrbgContext; |
| static mbedtls_entropy_context sEntropyContext; |
| #ifndef OT_MBEDTLS_STRONG_DEFAULT_ENTROPY_PRESENT |
| static constexpr uint16_t kEntropyMinThreshold = 16; |
| #endif |
| #endif |
| |
| OT_TOOL_WEAK void otPlatCryptoInit(void) |
| { |
| // Intentionally empty. |
| } |
| |
| // AES Implementation |
| OT_TOOL_WEAK otError otPlatCryptoAesInit(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| mbedtls_aes_context *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_aes_context), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_aes_context *>(aContext->mContext); |
| mbedtls_aes_init(context); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoAesSetKey(otCryptoContext *aContext, const otCryptoKey *aKey) |
| { |
| Error error = kErrorNone; |
| mbedtls_aes_context *context; |
| const LiteralKey key(*static_cast<const Key *>(aKey)); |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_aes_context), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_aes_context *>(aContext->mContext); |
| VerifyOrExit((mbedtls_aes_setkey_enc(context, key.GetBytes(), (key.GetLength() * CHAR_BIT)) == 0), |
| error = kErrorFailed); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoAesEncrypt(otCryptoContext *aContext, const uint8_t *aInput, uint8_t *aOutput) |
| { |
| Error error = kErrorNone; |
| mbedtls_aes_context *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_aes_context), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_aes_context *>(aContext->mContext); |
| VerifyOrExit((mbedtls_aes_crypt_ecb(context, MBEDTLS_AES_ENCRYPT, aInput, aOutput) == 0), error = kErrorFailed); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoAesFree(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| mbedtls_aes_context *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_aes_context), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_aes_context *>(aContext->mContext); |
| mbedtls_aes_free(context); |
| |
| exit: |
| return error; |
| } |
| |
| #if !OPENTHREAD_RADIO |
| |
| // HMAC implementations |
| OT_TOOL_WEAK otError otPlatCryptoHmacSha256Init(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| const mbedtls_md_info_t *mdInfo = nullptr; |
| mbedtls_md_context_t *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_md_context_t), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_md_context_t *>(aContext->mContext); |
| mbedtls_md_init(context); |
| mdInfo = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256); |
| VerifyOrExit((mbedtls_md_setup(context, mdInfo, 1) == 0), error = kErrorFailed); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoHmacSha256Deinit(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| mbedtls_md_context_t *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_md_context_t), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_md_context_t *>(aContext->mContext); |
| mbedtls_md_free(context); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoHmacSha256Start(otCryptoContext *aContext, const otCryptoKey *aKey) |
| { |
| Error error = kErrorNone; |
| const LiteralKey key(*static_cast<const Key *>(aKey)); |
| mbedtls_md_context_t *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_md_context_t), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_md_context_t *>(aContext->mContext); |
| VerifyOrExit((mbedtls_md_hmac_starts(context, key.GetBytes(), key.GetLength()) == 0), error = kErrorFailed); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoHmacSha256Update(otCryptoContext *aContext, const void *aBuf, uint16_t aBufLength) |
| { |
| Error error = kErrorNone; |
| mbedtls_md_context_t *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_md_context_t), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_md_context_t *>(aContext->mContext); |
| VerifyOrExit((mbedtls_md_hmac_update(context, reinterpret_cast<const uint8_t *>(aBuf), aBufLength) == 0), |
| error = kErrorFailed); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoHmacSha256Finish(otCryptoContext *aContext, uint8_t *aBuf, size_t aBufLength) |
| { |
| OT_UNUSED_VARIABLE(aBufLength); |
| |
| Error error = kErrorNone; |
| mbedtls_md_context_t *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_md_context_t), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_md_context_t *>(aContext->mContext); |
| VerifyOrExit((mbedtls_md_hmac_finish(context, aBuf) == 0), error = kErrorFailed); |
| |
| exit: |
| return error; |
| } |
| |
| otError otPlatCryptoHkdfInit(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(HmacSha256::Hash), error = kErrorFailed); |
| |
| new (aContext->mContext) HmacSha256::Hash(); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoHkdfExpand(otCryptoContext *aContext, |
| const uint8_t *aInfo, |
| uint16_t aInfoLength, |
| uint8_t *aOutputKey, |
| uint16_t aOutputKeyLength) |
| { |
| Error error = kErrorNone; |
| HmacSha256 hmac; |
| HmacSha256::Hash hash; |
| uint8_t iter = 0; |
| uint16_t copyLength; |
| HmacSha256::Hash *prk; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(HmacSha256::Hash), error = kErrorFailed); |
| |
| prk = static_cast<HmacSha256::Hash *>(aContext->mContext); |
| |
| // The aOutputKey is calculated as follows [RFC5889]: |
| // |
| // N = ceil( aOutputKeyLength / HashSize) |
| // T = T(1) | T(2) | T(3) | ... | T(N) |
| // aOutputKey is first aOutputKeyLength of T |
| // |
| // Where: |
| // T(0) = empty string (zero length) |
| // T(1) = HMAC-Hash(PRK, T(0) | info | 0x01) |
| // T(2) = HMAC-Hash(PRK, T(1) | info | 0x02) |
| // T(3) = HMAC-Hash(PRK, T(2) | info | 0x03) |
| // ... |
| |
| while (aOutputKeyLength > 0) |
| { |
| Key cryptoKey; |
| |
| cryptoKey.Set(prk->GetBytes(), sizeof(HmacSha256::Hash)); |
| hmac.Start(cryptoKey); |
| |
| if (iter != 0) |
| { |
| hmac.Update(hash); |
| } |
| |
| hmac.Update(aInfo, aInfoLength); |
| |
| iter++; |
| hmac.Update(iter); |
| hmac.Finish(hash); |
| |
| copyLength = Min(aOutputKeyLength, static_cast<uint16_t>(sizeof(hash))); |
| |
| memcpy(aOutputKey, hash.GetBytes(), copyLength); |
| aOutputKey += copyLength; |
| aOutputKeyLength -= copyLength; |
| } |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoHkdfExtract(otCryptoContext *aContext, |
| const uint8_t *aSalt, |
| uint16_t aSaltLength, |
| const otCryptoKey *aInputKey) |
| { |
| Error error = kErrorNone; |
| HmacSha256 hmac; |
| Key cryptoKey; |
| HmacSha256::Hash *prk; |
| const LiteralKey inputKey(*static_cast<const Key *>(aInputKey)); |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(HmacSha256::Hash), error = kErrorFailed); |
| |
| prk = static_cast<HmacSha256::Hash *>(aContext->mContext); |
| |
| cryptoKey.Set(aSalt, aSaltLength); |
| // PRK is calculated as HMAC-Hash(aSalt, aInputKey) |
| hmac.Start(cryptoKey); |
| hmac.Update(inputKey.GetBytes(), inputKey.GetLength()); |
| hmac.Finish(*prk); |
| |
| exit: |
| return error; |
| } |
| |
| otError otPlatCryptoHkdfDeinit(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| HmacSha256::Hash *prk; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(HmacSha256::Hash), error = kErrorFailed); |
| |
| prk = static_cast<HmacSha256::Hash *>(aContext->mContext); |
| prk->~Hash(); |
| aContext->mContext = nullptr; |
| aContext->mContextSize = 0; |
| |
| exit: |
| return error; |
| } |
| |
| // SHA256 platform implementations |
| OT_TOOL_WEAK otError otPlatCryptoSha256Init(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| mbedtls_sha256_context *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| |
| context = static_cast<mbedtls_sha256_context *>(aContext->mContext); |
| mbedtls_sha256_init(context); |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoSha256Deinit(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| mbedtls_sha256_context *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_sha256_context), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_sha256_context *>(aContext->mContext); |
| mbedtls_sha256_free(context); |
| aContext->mContext = nullptr; |
| aContext->mContextSize = 0; |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoSha256Start(otCryptoContext *aContext) |
| { |
| Error error = kErrorNone; |
| mbedtls_sha256_context *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_sha256_context), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_sha256_context *>(aContext->mContext); |
| |
| #if (MBEDTLS_VERSION_NUMBER >= 0x03000000) |
| VerifyOrExit((mbedtls_sha256_starts(context, 0) == 0), error = kErrorFailed); |
| #else |
| VerifyOrExit((mbedtls_sha256_starts_ret(context, 0) == 0), error = kErrorFailed); |
| #endif |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoSha256Update(otCryptoContext *aContext, const void *aBuf, uint16_t aBufLength) |
| { |
| Error error = kErrorNone; |
| mbedtls_sha256_context *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_sha256_context), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_sha256_context *>(aContext->mContext); |
| |
| #if (MBEDTLS_VERSION_NUMBER >= 0x03000000) |
| VerifyOrExit((mbedtls_sha256_update(context, reinterpret_cast<const uint8_t *>(aBuf), aBufLength) == 0), |
| error = kErrorFailed); |
| #else |
| VerifyOrExit((mbedtls_sha256_update_ret(context, reinterpret_cast<const uint8_t *>(aBuf), aBufLength) == 0), |
| error = kErrorFailed); |
| #endif |
| |
| exit: |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoSha256Finish(otCryptoContext *aContext, uint8_t *aHash, uint16_t aHashSize) |
| { |
| OT_UNUSED_VARIABLE(aHashSize); |
| |
| Error error = kErrorNone; |
| mbedtls_sha256_context *context; |
| |
| VerifyOrExit(aContext != nullptr, error = kErrorInvalidArgs); |
| VerifyOrExit(aContext->mContextSize >= sizeof(mbedtls_sha256_context), error = kErrorFailed); |
| |
| context = static_cast<mbedtls_sha256_context *>(aContext->mContext); |
| |
| #if (MBEDTLS_VERSION_NUMBER >= 0x03000000) |
| VerifyOrExit((mbedtls_sha256_finish(context, aHash) == 0), error = kErrorFailed); |
| #else |
| VerifyOrExit((mbedtls_sha256_finish_ret(context, aHash) == 0), error = kErrorFailed); |
| #endif |
| |
| exit: |
| return error; |
| } |
| |
| #ifndef OT_MBEDTLS_STRONG_DEFAULT_ENTROPY_PRESENT |
| |
| static int handleMbedtlsEntropyPoll(void *aData, unsigned char *aOutput, size_t aInLen, size_t *aOutLen) |
| { |
| int rval = MBEDTLS_ERR_ENTROPY_SOURCE_FAILED; |
| |
| SuccessOrExit(otPlatEntropyGet(reinterpret_cast<uint8_t *>(aOutput), static_cast<uint16_t>(aInLen))); |
| rval = 0; |
| |
| VerifyOrExit(aOutLen != nullptr); |
| *aOutLen = aInLen; |
| |
| exit: |
| OT_UNUSED_VARIABLE(aData); |
| return rval; |
| } |
| |
| #endif // OT_MBEDTLS_STRONG_DEFAULT_ENTROPY_PRESENT |
| |
| OT_TOOL_WEAK void otPlatCryptoRandomInit(void) |
| { |
| mbedtls_entropy_init(&sEntropyContext); |
| |
| #ifndef OT_MBEDTLS_STRONG_DEFAULT_ENTROPY_PRESENT |
| mbedtls_entropy_add_source(&sEntropyContext, handleMbedtlsEntropyPoll, nullptr, kEntropyMinThreshold, |
| MBEDTLS_ENTROPY_SOURCE_STRONG); |
| #endif |
| |
| mbedtls_ctr_drbg_init(&sCtrDrbgContext); |
| |
| int rval = mbedtls_ctr_drbg_seed(&sCtrDrbgContext, mbedtls_entropy_func, &sEntropyContext, nullptr, 0); |
| OT_ASSERT(rval == 0); |
| OT_UNUSED_VARIABLE(rval); |
| } |
| |
| OT_TOOL_WEAK void otPlatCryptoRandomDeinit(void) |
| { |
| mbedtls_entropy_free(&sEntropyContext); |
| mbedtls_ctr_drbg_free(&sCtrDrbgContext); |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoRandomGet(uint8_t *aBuffer, uint16_t aSize) |
| { |
| return ot::Crypto::MbedTls::MapError( |
| mbedtls_ctr_drbg_random(&sCtrDrbgContext, static_cast<unsigned char *>(aBuffer), static_cast<size_t>(aSize))); |
| } |
| |
| #if OPENTHREAD_CONFIG_ECDSA_ENABLE |
| |
| OT_TOOL_WEAK otError otPlatCryptoEcdsaGenerateKey(otPlatCryptoEcdsaKeyPair *aKeyPair) |
| { |
| mbedtls_pk_context pk; |
| int ret; |
| |
| mbedtls_pk_init(&pk); |
| |
| ret = mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)); |
| VerifyOrExit(ret == 0); |
| |
| ret = mbedtls_ecp_gen_key(MBEDTLS_ECP_DP_SECP256R1, mbedtls_pk_ec(pk), MbedTls::CryptoSecurePrng, nullptr); |
| VerifyOrExit(ret == 0); |
| |
| ret = mbedtls_pk_write_key_der(&pk, aKeyPair->mDerBytes, OT_CRYPTO_ECDSA_MAX_DER_SIZE); |
| VerifyOrExit(ret > 0); |
| |
| aKeyPair->mDerLength = static_cast<uint8_t>(ret); |
| |
| memmove(aKeyPair->mDerBytes, aKeyPair->mDerBytes + OT_CRYPTO_ECDSA_MAX_DER_SIZE - aKeyPair->mDerLength, |
| aKeyPair->mDerLength); |
| |
| exit: |
| mbedtls_pk_free(&pk); |
| |
| return (ret >= 0) ? kErrorNone : MbedTls::MapError(ret); |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoEcdsaGetPublicKey(const otPlatCryptoEcdsaKeyPair *aKeyPair, |
| otPlatCryptoEcdsaPublicKey *aPublicKey) |
| { |
| Error error = kErrorNone; |
| mbedtls_pk_context pk; |
| mbedtls_ecp_keypair *keyPair; |
| int ret; |
| |
| mbedtls_pk_init(&pk); |
| |
| VerifyOrExit(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)) == 0, error = kErrorFailed); |
| |
| #if (MBEDTLS_VERSION_NUMBER >= 0x03000000) |
| VerifyOrExit(mbedtls_pk_parse_key(&pk, aKeyPair->mDerBytes, aKeyPair->mDerLength, nullptr, 0, |
| MbedTls::CryptoSecurePrng, nullptr) == 0, |
| error = kErrorParse); |
| #else |
| VerifyOrExit(mbedtls_pk_parse_key(&pk, aKeyPair->mDerBytes, aKeyPair->mDerLength, nullptr, 0) == 0, |
| error = kErrorParse); |
| #endif |
| |
| keyPair = mbedtls_pk_ec(pk); |
| |
| ret = mbedtls_mpi_write_binary(&keyPair->MBEDTLS_PRIVATE(Q).MBEDTLS_PRIVATE(X), aPublicKey->m8, |
| Ecdsa::P256::kMpiSize); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| ret = mbedtls_mpi_write_binary(&keyPair->MBEDTLS_PRIVATE(Q).MBEDTLS_PRIVATE(Y), |
| aPublicKey->m8 + Ecdsa::P256::kMpiSize, Ecdsa::P256::kMpiSize); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| exit: |
| mbedtls_pk_free(&pk); |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoEcdsaSign(const otPlatCryptoEcdsaKeyPair *aKeyPair, |
| const otPlatCryptoSha256Hash *aHash, |
| otPlatCryptoEcdsaSignature *aSignature) |
| { |
| Error error = kErrorNone; |
| mbedtls_pk_context pk; |
| mbedtls_ecp_keypair *keypair; |
| mbedtls_ecdsa_context ecdsa; |
| mbedtls_mpi r; |
| mbedtls_mpi s; |
| int ret; |
| |
| mbedtls_pk_init(&pk); |
| mbedtls_ecdsa_init(&ecdsa); |
| mbedtls_mpi_init(&r); |
| mbedtls_mpi_init(&s); |
| |
| VerifyOrExit(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)) == 0, error = kErrorFailed); |
| |
| #if (MBEDTLS_VERSION_NUMBER >= 0x03000000) |
| VerifyOrExit(mbedtls_pk_parse_key(&pk, aKeyPair->mDerBytes, aKeyPair->mDerLength, nullptr, 0, |
| MbedTls::CryptoSecurePrng, nullptr) == 0, |
| error = kErrorParse); |
| #else |
| VerifyOrExit(mbedtls_pk_parse_key(&pk, aKeyPair->mDerBytes, aKeyPair->mDerLength, nullptr, 0) == 0, |
| error = kErrorParse); |
| #endif |
| |
| keypair = mbedtls_pk_ec(pk); |
| |
| ret = mbedtls_ecdsa_from_keypair(&ecdsa, keypair); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| #if (MBEDTLS_VERSION_NUMBER >= 0x02130000) |
| ret = mbedtls_ecdsa_sign_det_ext(&ecdsa.MBEDTLS_PRIVATE(grp), &r, &s, &ecdsa.MBEDTLS_PRIVATE(d), aHash->m8, |
| Sha256::Hash::kSize, MBEDTLS_MD_SHA256, MbedTls::CryptoSecurePrng, nullptr); |
| #else |
| ret = mbedtls_ecdsa_sign_det(&ecdsa.MBEDTLS_PRIVATE(grp), &r, &s, &ecdsa.MBEDTLS_PRIVATE(d), aHash->m8, |
| Sha256::Hash::kSize, MBEDTLS_MD_SHA256); |
| #endif |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| OT_ASSERT(mbedtls_mpi_size(&r) <= Ecdsa::P256::kMpiSize); |
| |
| ret = mbedtls_mpi_write_binary(&r, aSignature->m8, Ecdsa::P256::kMpiSize); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| ret = mbedtls_mpi_write_binary(&s, aSignature->m8 + Ecdsa::P256::kMpiSize, Ecdsa::P256::kMpiSize); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| exit: |
| mbedtls_pk_free(&pk); |
| mbedtls_mpi_free(&s); |
| mbedtls_mpi_free(&r); |
| mbedtls_ecdsa_free(&ecdsa); |
| |
| return error; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoEcdsaVerify(const otPlatCryptoEcdsaPublicKey *aPublicKey, |
| const otPlatCryptoSha256Hash *aHash, |
| const otPlatCryptoEcdsaSignature *aSignature) |
| { |
| Error error = kErrorNone; |
| mbedtls_ecdsa_context ecdsa; |
| mbedtls_mpi r; |
| mbedtls_mpi s; |
| int ret; |
| |
| mbedtls_ecdsa_init(&ecdsa); |
| mbedtls_mpi_init(&r); |
| mbedtls_mpi_init(&s); |
| |
| ret = mbedtls_ecp_group_load(&ecdsa.MBEDTLS_PRIVATE(grp), MBEDTLS_ECP_DP_SECP256R1); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| ret = mbedtls_mpi_read_binary(&ecdsa.MBEDTLS_PRIVATE(Q).MBEDTLS_PRIVATE(X), aPublicKey->m8, Ecdsa::P256::kMpiSize); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| ret = mbedtls_mpi_read_binary(&ecdsa.MBEDTLS_PRIVATE(Q).MBEDTLS_PRIVATE(Y), aPublicKey->m8 + Ecdsa::P256::kMpiSize, |
| Ecdsa::P256::kMpiSize); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| ret = mbedtls_mpi_lset(&ecdsa.MBEDTLS_PRIVATE(Q).MBEDTLS_PRIVATE(Z), 1); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| ret = mbedtls_mpi_read_binary(&r, aSignature->m8, Ecdsa::P256::kMpiSize); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| ret = mbedtls_mpi_read_binary(&s, aSignature->m8 + Ecdsa::P256::kMpiSize, Ecdsa::P256::kMpiSize); |
| VerifyOrExit(ret == 0, error = MbedTls::MapError(ret)); |
| |
| ret = mbedtls_ecdsa_verify(&ecdsa.MBEDTLS_PRIVATE(grp), aHash->m8, Sha256::Hash::kSize, &ecdsa.MBEDTLS_PRIVATE(Q), |
| &r, &s); |
| VerifyOrExit(ret == 0, error = kErrorSecurity); |
| |
| exit: |
| mbedtls_mpi_free(&s); |
| mbedtls_mpi_free(&r); |
| mbedtls_ecdsa_free(&ecdsa); |
| |
| return error; |
| } |
| |
| #endif // #if OPENTHREAD_CONFIG_ECDSA_ENABLE |
| |
| #endif // #if !OPENTHREAD_RADIO |
| |
| #elif OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_PSA |
| |
| #if !OPENTHREAD_RADIO |
| #if OPENTHREAD_CONFIG_ECDSA_ENABLE |
| |
| OT_TOOL_WEAK otError otPlatCryptoEcdsaGenerateKey(otPlatCryptoEcdsaKeyPair *aKeyPair) |
| { |
| OT_UNUSED_VARIABLE(aKeyPair); |
| |
| return OT_ERROR_NOT_CAPABLE; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoEcdsaGetPublicKey(const otPlatCryptoEcdsaKeyPair *aKeyPair, |
| otPlatCryptoEcdsaPublicKey *aPublicKey) |
| { |
| OT_UNUSED_VARIABLE(aKeyPair); |
| OT_UNUSED_VARIABLE(aPublicKey); |
| |
| return OT_ERROR_NOT_CAPABLE; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoEcdsaSign(const otPlatCryptoEcdsaKeyPair *aKeyPair, |
| const otPlatCryptoSha256Hash *aHash, |
| otPlatCryptoEcdsaSignature *aSignature) |
| { |
| OT_UNUSED_VARIABLE(aKeyPair); |
| OT_UNUSED_VARIABLE(aHash); |
| OT_UNUSED_VARIABLE(aSignature); |
| |
| return OT_ERROR_NOT_CAPABLE; |
| } |
| |
| OT_TOOL_WEAK otError otPlatCryptoEcdsaVerify(const otPlatCryptoEcdsaPublicKey *aPublicKey, |
| const otPlatCryptoSha256Hash *aHash, |
| const otPlatCryptoEcdsaSignature *aSignature) |
| |
| { |
| OT_UNUSED_VARIABLE(aPublicKey); |
| OT_UNUSED_VARIABLE(aHash); |
| OT_UNUSED_VARIABLE(aSignature); |
| |
| return OT_ERROR_NOT_CAPABLE; |
| } |
| #endif // #if OPENTHREAD_CONFIG_ECDSA_ENABLE |
| |
| #endif // #if !OPENTHREAD_RADIO |
| |
| #endif // #if OPENTHREAD_CONFIG_CRYPTO_LIB == OPENTHREAD_CONFIG_CRYPTO_LIB_MBEDTLS |
| |
| //--------------------------------------------------------------------------------------------------------------------- |
| // APIs to be used in "hybrid" mode by every OPENTHREAD_CONFIG_CRYPTO_LIB variant until full PSA support is ready |
| |
| #if OPENTHREAD_FTD |
| |
| OT_TOOL_WEAK void otPlatCryptoPbkdf2GenerateKey(const uint8_t *aPassword, |
| uint16_t aPasswordLen, |
| const uint8_t *aSalt, |
| uint16_t aSaltLen, |
| uint32_t aIterationCounter, |
| uint16_t aKeyLen, |
| uint8_t *aKey) |
| { |
| #if (MBEDTLS_VERSION_NUMBER >= 0x03050000) |
| const size_t kBlockSize = MBEDTLS_CMAC_MAX_BLOCK_SIZE; |
| #else |
| const size_t kBlockSize = MBEDTLS_CIPHER_BLKSIZE_MAX; |
| #endif |
| uint8_t prfInput[OT_CRYPTO_PBDKF2_MAX_SALT_SIZE + 4]; // Salt || INT(), for U1 calculation |
| long prfOne[kBlockSize / sizeof(long)]; |
| long prfTwo[kBlockSize / sizeof(long)]; |
| long keyBlock[kBlockSize / sizeof(long)]; |
| uint32_t blockCounter = 0; |
| uint8_t *key = aKey; |
| uint16_t keyLen = aKeyLen; |
| uint16_t useLen = 0; |
| |
| OT_ASSERT(aSaltLen <= sizeof(prfInput)); |
| memcpy(prfInput, aSalt, aSaltLen); |
| OT_ASSERT(aIterationCounter % 2 == 0); |
| aIterationCounter /= 2; |
| |
| #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
| // limit iterations to avoid OSS-Fuzz timeouts |
| aIterationCounter = 2; |
| #endif |
| |
| while (keyLen) |
| { |
| ++blockCounter; |
| prfInput[aSaltLen + 0] = static_cast<uint8_t>(blockCounter >> 24); |
| prfInput[aSaltLen + 1] = static_cast<uint8_t>(blockCounter >> 16); |
| prfInput[aSaltLen + 2] = static_cast<uint8_t>(blockCounter >> 8); |
| prfInput[aSaltLen + 3] = static_cast<uint8_t>(blockCounter); |
| |
| // Calculate U_1 |
| mbedtls_aes_cmac_prf_128(aPassword, aPasswordLen, prfInput, aSaltLen + 4, |
| reinterpret_cast<uint8_t *>(keyBlock)); |
| |
| // Calculate U_2 |
| mbedtls_aes_cmac_prf_128(aPassword, aPasswordLen, reinterpret_cast<const uint8_t *>(keyBlock), kBlockSize, |
| reinterpret_cast<uint8_t *>(prfOne)); |
| |
| for (uint32_t j = 0; j < kBlockSize / sizeof(long); ++j) |
| { |
| keyBlock[j] ^= prfOne[j]; |
| } |
| |
| for (uint32_t i = 1; i < aIterationCounter; ++i) |
| { |
| // Calculate U_{2 * i - 1} |
| mbedtls_aes_cmac_prf_128(aPassword, aPasswordLen, reinterpret_cast<const uint8_t *>(prfOne), kBlockSize, |
| reinterpret_cast<uint8_t *>(prfTwo)); |
| // Calculate U_{2 * i} |
| mbedtls_aes_cmac_prf_128(aPassword, aPasswordLen, reinterpret_cast<const uint8_t *>(prfTwo), kBlockSize, |
| reinterpret_cast<uint8_t *>(prfOne)); |
| |
| for (uint32_t j = 0; j < kBlockSize / sizeof(long); ++j) |
| { |
| keyBlock[j] ^= prfOne[j] ^ prfTwo[j]; |
| } |
| } |
| |
| useLen = Min(keyLen, static_cast<uint16_t>(kBlockSize)); |
| memcpy(key, keyBlock, useLen); |
| key += useLen; |
| keyLen -= useLen; |
| } |
| } |
| |
| #endif // #if OPENTHREAD_FTD |
