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Diffstat (limited to 'src/crypto/impl/mbedtls.c')
| -rw-r--r-- | src/crypto/impl/mbedtls.c | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/src/crypto/impl/mbedtls.c b/src/crypto/impl/mbedtls.c deleted file mode 100644 index 057e7b4..0000000 --- a/src/crypto/impl/mbedtls.c +++ /dev/null @@ -1,172 +0,0 @@ -/* -* Copyright (c) 2024 Vaughn Nugent -* -* Package: noscrypt -* File: mbedtls.c -* -* This library is free software; you can redistribute it and/or -* modify it under the terms of the GNU Lesser General Public License -* as published by the Free Software Foundation; either version 2.1 -* of the License, or (at your option) any later version. -* -* This library is distributed in the hope that it will be useful, -* but WITHOUT ANY WARRANTY; without even the implied warranty of -* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -* Lesser General Public License for more details. -* -* You should have received a copy of the GNU Lesser General Public License -* along with noscrypt. If not, see http://www.gnu.org/licenses/. -*/ - - -/* -* This file contains implemntation functions for the required -* cryptography primitives of noscrypt. This file stubs functionality -* using the Mbed-TLS library, if the builder desires to link against -* it. -*/ - -#ifdef MBEDTLS_CRYPTO_LIB - -/* Inline errors on linux in header files on linux */ -#ifndef inline - #define inline __inline -#endif - -#include <mbedtls/md.h> -#include <mbedtls/hkdf.h> -#include <mbedtls/hmac_drbg.h> -#include <mbedtls/sha256.h> -#include <mbedtls/chacha20.h> -#include <mbedtls/constant_time.h> - -#ifndef inline - #undef inline -#endif - - -_IMPLSTB const mbedtls_md_info_t* _mbed_sha256_alg(void) -{ - const mbedtls_md_info_t* info; - /* Get sha256 md info for hdkf operations */ - info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256); - DEBUG_ASSERT2(info != NULL, "Expected SHA256 md info pointer to be valid") - return info; -} - -#if SIZE_MAX < UINT64_MAX - #define _ssize_guard_int(x) if(x > SIZE_MAX) return 1; -#else - #define _ssize_guard_int(x) -#endif - -#ifndef _IMPL_CHACHA20_CRYPT - - /* Export chacha20 computation */ - #define _IMPL_CHACHA20_CRYPT _mbed_chacha20_encrypt - - _IMPLSTB cstatus_t _mbed_chacha20_encrypt( - const uint8_t* key, - const uint8_t* nonce, - const uint8_t* input, - uint8_t* output, - uint32_t dataLen - ) - { - _overflow_check(dataLen) - - /* Counter always starts at 0 */ - return mbedtls_chacha20_crypt( - key, - nonce, - 0x00u, /* nip-44 counter version */ - dataLen, - input, - output - ) == 0 ? CSTATUS_OK : CSTATUS_FAIL; - } - -#endif - -/* Export sha256 if not already defined */ -#ifndef _IMPL_CRYPTO_SHA256_DIGEST - - #define _IMPL_CRYPTO_SHA256_DIGEST _mbed_sha256_digest - - _IMPLSTB cstatus_t _mbed_sha256_digest(const cspan_t* data, sha256_t digestOut32) - { - _overflow_check(data->size) - - return mbedtls_sha256( - data->data, - data->size, - digestOut32, - 0 /* Set 0 for sha256 mode */ - ) == 0 ? CSTATUS_OK : CSTATUS_FAIL; - } - -#endif - -/* Export Sha256 hmac if not already defined by other libs */ -#ifndef _IMPL_CRYPTO_SHA256_HMAC - - #define _IMPL_CRYPTO_SHA256_HMAC _mbed_sha256_hmac - - _IMPLSTB cstatus_t _mbed_sha256_hmac(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32) - { - _overflow_check(data->size) - - /* Keys should never be large enough for this to matter, but sanity check. */ - DEBUG_ASSERT2(key->size < SIZE_MAX, "Expected key size to be less than SIZE_MAX") - - return mbedtls_md_hmac( - _mbed_sha256_alg(), - key->data, - key->size, - data->data, - data->size, - hmacOut32 - ) == 0 ? CSTATUS_OK : CSTATUS_FAIL; - } -#endif - -/* Export hkdf expand if not already defined */ -#ifndef _IMPL_CRYPTO_SHA256_HKDF_EXPAND - - #define _IMPL_CRYPTO_SHA256_HKDF_EXPAND _mbed_sha256_hkdf_expand - - _IMPLSTB cstatus_t _mbed_sha256_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm) - { - /* These sizes should never be large enough to overflow on <64bit platforms, but sanity check */ - DEBUG_ASSERT(okm->size < SIZE_MAX) - DEBUG_ASSERT(prk->size < SIZE_MAX) - DEBUG_ASSERT(info->size < SIZE_MAX) - - return mbedtls_hkdf_expand( - _mbed_sha256_alg(), - prk->data, - prk->size, - info->data, - info->size, - okm->data, - okm->size - ) == 0 ? CSTATUS_OK : CSTATUS_FAIL; - } - -#endif - -/* Export fixed-time compare if not already defined */ -#ifndef _IMPL_CRYPTO_FIXED_TIME_COMPARE - - #define _IMPL_CRYPTO_FIXED_TIME_COMPARE _mbed_fixed_time_compare - - /* fixed-time memcmp */ - _IMPLSTB uint32_t _mbed_fixed_time_compare(const uint8_t* a, const uint8_t* b, uint32_t size) - { - _ssize_guard_int(size) - - return (uint32_t)mbedtls_ct_memcmp(a, b, size); - } -#endif - -#endif
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