diff options
Diffstat (limited to 'src/crypto/impl')
| -rw-r--r-- | src/crypto/impl/bcrypt.c | 263 | ||||
| -rw-r--r-- | src/crypto/impl/mbedtls.c | 172 | ||||
| -rw-r--r-- | src/crypto/impl/monocypher.c | 80 | ||||
| -rw-r--r-- | src/crypto/impl/openssl.c | 180 |
4 files changed, 0 insertions, 695 deletions
diff --git a/src/crypto/impl/bcrypt.c b/src/crypto/impl/bcrypt.c deleted file mode 100644 index 9b01cac..0000000 --- a/src/crypto/impl/bcrypt.c +++ /dev/null @@ -1,263 +0,0 @@ -/* -* Copyright (c) 2024 Vaughn Nugent -* -* Package: noscrypt -* File: impl/bcrypt.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 provides as many fallback implementations on Windows plaforms -* as possible using the bcrypt library. This file should be included behind -* other libarry implementations, as it is a fallback. -*/ - -#ifdef _NC_IS_WINDOWS - -#define WIN32_LEAN_AND_MEAN -#include <Windows.h> -#include <bcrypt.h> - -#include "nc-util.h" -#include "hkdf.h" - -#define IF_BC_FAIL(x) if(!BCRYPT_SUCCESS(x)) -#define BC_FAIL(x) if(!BCRYPT_SUCCESS(x)) return CSTATUS_FAIL; - -struct _bcrypt_ctx -{ - BCRYPT_ALG_HANDLE hAlg; - BCRYPT_HASH_HANDLE hHash; -}; - -_IMPLSTB NTSTATUS _bcInitSha256(struct _bcrypt_ctx* ctx, DWORD flags) -{ - NTSTATUS result; - - result = BCryptOpenAlgorithmProvider( - &ctx->hAlg, - BCRYPT_SHA256_ALGORITHM, - NULL, - flags - ); - - /* - * If operation failed, ensure the algorithm handle is null - * to make free code easier to cleanup - */ - if (!BCRYPT_SUCCESS(result)) - { - ctx->hAlg = NULL; - } - - return result; -} - -_IMPLSTB NTSTATUS _bcCreateHmac(struct _bcrypt_ctx* ctx, const cspan_t* key) -{ - /* - * NOTE: - * I am not explicitly managing the update object buffer. By setting - * the update object to NULL, and length to 0, the buffer will be - * managed by the bcrypt library. - * - * See: https://learn.microsoft.com/en-us/windows/win32/api/bcrypt/nf-bcrypt-bcryptcreatehash - */ - - return BCryptCreateHash( - ctx->hAlg, - &ctx->hHash, - NULL, - 0, - (uint8_t*)key->data, - key->size, - BCRYPT_HASH_REUSABLE_FLAG /* Enable reusable for expand function */ - ); -} - -_IMPLSTB NTSTATUS _bcCreate(struct _bcrypt_ctx* ctx) -{ - cspan_t key; - - /* Zero out key span for 0 size and NULL data ptr */ - SecureZeroMemory(&key, sizeof(cspan_t)); - - return _bcCreateHmac(ctx, &key); -} - -_IMPLSTB NTSTATUS _bcHashDataRaw(const struct _bcrypt_ctx* ctx, const uint8_t* data, uint32_t len) -{ - return BCryptHashData(ctx->hHash, (uint8_t*)data, len, 0); -} - -_IMPLSTB NTSTATUS _bcHashData(const struct _bcrypt_ctx* ctx, const cspan_t* data) -{ - return _bcHashDataRaw(ctx, data->data, data->size); -} - -_IMPLSTB NTSTATUS _bcFinishHash(const struct _bcrypt_ctx* ctx, sha256_t digestOut32) -{ - return BCryptFinishHash(ctx->hHash, digestOut32, sizeof(sha256_t), 0); -} - -_IMPLSTB void _bcDestroyCtx(struct _bcrypt_ctx* ctx) -{ - /* Free the update memory if it was allocated */ - if(ctx->hHash) BCryptDestroyHash(ctx->hHash); - - /* Close the algorithm provider */ - if (ctx->hAlg) BCryptCloseAlgorithmProvider(ctx->hAlg, 0); - - ctx->hAlg = NULL; - ctx->hHash = NULL; -} - -#ifndef _IMPL_SECURE_ZERO_MEMSET - /* - * On Windows, we can use SecureZeroMemory - * as platform zeroing function. - * - * NOTE: - * SecureZeroMemory2 uses volitle function argument - * pointers, which is a contested mehtod of compiler - * optimization prevention. GNU seems to oppose this method - * - * https://learn.microsoft.com/en-us/windows/win32/memory/winbase-securezeromemory2 - */ - #define _IMPL_SECURE_ZERO_MEMSET SecureZeroMemory -#endif /* !_IMPL_SECURE_ZERO_MEMSET */ - -/* -* Provide win32 fallback for sha256 digest if needed -*/ - -#ifndef _IMPL_CRYPTO_SHA256_DIGEST - - /* Export function fallack */ - #define _IMPL_CRYPTO_SHA256_DIGEST _bcrypt_sha256_digest - - _IMPLSTB cstatus_t _bcrypt_sha256_digest(const cspan_t* data, sha256_t digestOut32) - { - cstatus_t result; - struct _bcrypt_ctx ctx; - - result = CSTATUS_FAIL; /* Start in fail state */ - - IF_BC_FAIL(_bcInitSha256(&ctx, 0)) goto Exit; - - IF_BC_FAIL(_bcCreate(&ctx)) goto Exit; - - IF_BC_FAIL(_bcHashData(&ctx, data)) goto Exit; - - IF_BC_FAIL(_bcFinishHash(&ctx, digestOut32)) goto Exit; - - result = CSTATUS_OK; /* Hash operation completed, so set success */ - - Exit: - - _bcDestroyCtx(&ctx); - - return result; - } - -#endif /* !_IMPL_CRYPTO_SHA256_DIGEST */ - -#ifndef _IMPL_CRYPTO_SHA256_HMAC - - /* Export function */ - #define _IMPL_CRYPTO_SHA256_HMAC _bcrypt_hmac_sha256 - - _IMPLSTB cstatus_t _bcrypt_hmac_sha256(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32) - { - cstatus_t result; - struct _bcrypt_ctx ctx; - - result = CSTATUS_FAIL; /* Start in fail state */ - - /* Init context with hmac flag set */ - IF_BC_FAIL(_bcInitSha256(&ctx, BCRYPT_ALG_HANDLE_HMAC_FLAG)) goto Exit; - - IF_BC_FAIL(_bcCreateHmac(&ctx, key)) goto Exit; - - IF_BC_FAIL(_bcHashData(&ctx, data)) goto Exit; - - IF_BC_FAIL(_bcFinishHash(&ctx, hmacOut32)) goto Exit; - - result = CSTATUS_OK; /* HMAC operation completed, so set success */ - - Exit: - - _bcDestroyCtx(&ctx); - - return result; - } - -#endif /* !_IMPL_CRYPTO_SHA256_HMAC */ - -/* -* Provide a fallback HKDF expand function using the -* HMAC function as a base. -*/ - -#ifndef _IMPL_CRYPTO_SHA256_HKDF_EXPAND - - #define _IMPL_CRYPTO_SHA256_HKDF_EXPAND _bcrypt_fallback_hkdf_expand - - cstatus_t _bcrypt_hkdf_update(void* ctx, const cspan_t* data) - { - DEBUG_ASSERT(ctx != NULL) - - BC_FAIL(_bcHashData((struct _bcrypt_ctx*)ctx, data)) - return CSTATUS_OK; - } - - cstatus_t _bcrypt_hkdf_finish(void* ctx, sha256_t hmacOut32) - { - DEBUG_ASSERT(ctx != NULL) - - BC_FAIL(_bcFinishHash((struct _bcrypt_ctx*)ctx, hmacOut32)) - return CSTATUS_OK; - } - - _IMPLSTB cstatus_t _bcrypt_fallback_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm) - { - cstatus_t result; - struct _bcrypt_ctx ctx; - struct nc_hkdf_fn_cb_struct handler; - - handler.update = _bcrypt_hkdf_update; - handler.finish = _bcrypt_hkdf_finish; - - /* Init bcrypt */ - BC_FAIL(_bcInitSha256(&ctx, BCRYPT_ALG_HANDLE_HMAC_FLAG)) - - BC_FAIL(_bcCreateHmac(&ctx, prk)) - - /* - * NOTE! Hmac reusable flag must be set to allow for multiple - * calls to the finish function without losing the context. - */ - - result = hkdfExpandProcess(&handler, &ctx, info, okm); - - _bcDestroyCtx(&ctx); - - return result; - } - -#endif /* !_IMPL_CRYPTO_SHA256_HKDF_EXPAND */ - -#endif /* _NC_IS_WINDOWS */
\ No newline at end of file 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
\ No newline at end of file diff --git a/src/crypto/impl/monocypher.c b/src/crypto/impl/monocypher.c deleted file mode 100644 index 7c9faea..0000000 --- a/src/crypto/impl/monocypher.c +++ /dev/null @@ -1,80 +0,0 @@ -/* -* Copyright (c) 2024 Vaughn Nugent -* -* Package: noscrypt -* File: impl/monocypher.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 handles some fallbacks that may not be available on -* some platforms. More specifically: -* - Secure memset 0 -* - Chacha20 cipher -* -*/ - -#ifdef NC_ENABLE_MONOCYPHER - -#include <monocypher.h> - -#include "nc-util.h" - -/* Export secure memse0 */ -#ifndef _IMPL_SECURE_ZERO_MEMSET - - /* export cytpo wipe function as is */ - #define _IMPL_SECURE_ZERO_MEMSET crypto_wipe -#endif - -/* Export Chacha20 */ -#ifndef _IMPL_CHACHA20_CRYPT - - #define _IMPL_CHACHA20_CRYPT _mc_chacha20_crypt - - _IMPLSTB cstatus_t _mc_chacha20_crypt( - const uint8_t* key, - const uint8_t* nonce, - const uint8_t* input, - uint8_t* output, - uint32_t dataLen - ) - { - _overflow_check(dataLen) - - /* - * Function returns the next counter value which is not - * needed for noscrypt as encryptions are one-shot, and - * require a new nonce for each encryption. - * - * ITEF function uses a 12byte nonce which is required for - * nip-44 compliant encryption. - */ - crypto_chacha20_ietf( - output, - input, - (size_t)dataLen, - key, - nonce, - 0x00 /* Counter always starts at 0 */ - ); - - return CSTATUS_OK; - } - -#endif - -#endif /* !NC_ENABLE_MONOCYPHER */
\ No newline at end of file diff --git a/src/crypto/impl/openssl.c b/src/crypto/impl/openssl.c deleted file mode 100644 index fd3b4e6..0000000 --- a/src/crypto/impl/openssl.c +++ /dev/null @@ -1,180 +0,0 @@ -/* -* Copyright (c) 2024 Vaughn Nugent -* -* Package: noscrypt -* File: impl/openssl.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/. -*/ - - -/* Setup openssl */ -#ifdef OPENSSL_CRYPTO_LIB - -#include "nc-util.h" -#include <openssl/crypto.h> - -#define _OSSL_FAIL(x) if(!(x)) return CSTATUS_FAIL; - -#ifndef _IMPL_SECURE_ZERO_MEMSET - - #define _IMPL_SECURE_ZERO_MEMSET _ossl_secure_zero_memset - - _IMPLSTB void _ossl_secure_zero_memset(void* ptr, size_t size) - { - _overflow_check(size) - - OPENSSL_cleanse(ptr, size); - } -#endif - -#ifndef _IMPL_CRYPTO_FIXED_TIME_COMPARE - - #define _IMPL_CRYPTO_FIXED_TIME_COMPARE _ossl_fixed_time_compare - - _IMPLSTB uint32_t _ossl_fixed_time_compare(const uint8_t* a, const uint8_t* b, uint32_t size) - { - int result; - - /* Size checks are required for platforms that have integer sizes under 32bit */ - _overflow_check(size) - - result = CRYPTO_memcmp(a, b, size); - - return (uint32_t)result; - } - -#endif /* _IMPL_CRYPTO_FIXED_TIME_COMPARE */ - - -#ifndef _IMPL_CRYPTO_SHA256_DIGEST - - #include <openssl/sha.h> - - #define _IMPL_CRYPTO_SHA256_DIGEST _ossl_sha256_digest - - _IMPLSTB cstatus_t _ossl_sha256_digest(const cspan_t* data, sha256_t digestOut32) - { - _overflow_check(data->size) - - _OSSL_FAIL(SHA256(data->data, data->size, digestOut32)) - - return CSTATUS_OK; - } - -#endif - -#ifndef _IMPL_CRYPTO_SHA256_HMAC - - #include <openssl/hmac.h> - - /* Export function */ - #define _IMPL_CRYPTO_SHA256_HMAC _ossl_hmac_sha256 - - _IMPLSTB cstatus_t _ossl_hmac_sha256(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32) - { - unsigned int hmacLen; - - _overflow_check(key->size) - _overflow_check(data->size) - - hmacLen = sizeof(sha256_t); - - _OSSL_FAIL( - HMAC( - EVP_sha256(), - key->data, - key->size, - data->data, - data->size, - hmacOut32, - &hmacLen - ) - ) - - /* digest length should match the actual digest size */ - DEBUG_ASSERT(hmacLen == sizeof(sha256_t)) - - return CSTATUS_OK; - } - -#endif /* !_IMPL_CRYPTO_SHA256_HMAC */ - -#ifndef _IMPL_CRYPTO_SHA256_HKDF_EXPAND - - #include <openssl/hmac.h> - #include "hkdf.h" - - #define _IMPL_CRYPTO_SHA256_HKDF_EXPAND _ossl_sha256_hkdf_expand - - cstatus_t _ossl_hkdf_update(void* ctx, const cspan_t* data) - { - DEBUG_ASSERT(ctx != NULL) - - _overflow_check(data->size) - - _OSSL_FAIL(EVP_DigestUpdate((EVP_MD_CTX*)ctx, data->data, data->size)) - - return CSTATUS_OK; - } - - cstatus_t _ossl_hkdf_finish(void* ctx, sha256_t hmacOut32) - { - unsigned int hmacSize; - - DEBUG_ASSERT(ctx != NULL) - - hmacSize = sizeof(sha256_t); - - _OSSL_FAIL(EVP_DigestFinal_ex((EVP_MD_CTX*)ctx, hmacOut32, &hmacSize)) - - /* When configured for sha256, should always be the same size in/out */ - DEBUG_ASSERT(hmacSize == sizeof(sha256_t)) - - return CSTATUS_OK; - } - - _IMPLSTB cstatus_t _ossl_sha256_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm) - { - EVP_MD_CTX* ctx; - cstatus_t result; - struct nc_hkdf_fn_cb_struct handler; - - /* - * NOTE! Hmac reusable flag must be set to allow for multiple - * calls to the finish function without losing the context. - */ - - if ((ctx = EVP_MD_CTX_create()) == NULL) - { - return CSTATUS_FAIL; - } - - _OSSL_FAIL(EVP_DigestInit_ex2(ctx, EVP_sha256(), NULL)) - - _OSSL_FAIL(EVP_DigestUpdate(ctx, prk->data, prk->size)); - - handler.update = _ossl_hkdf_update; - handler.finish = _ossl_hkdf_finish; - - result = hkdfExpandProcess(&handler, ctx, info, okm); - - EVP_MD_CTX_destroy(ctx); - - return result; - } - -#endif /* !_IMPL_CRYPTO_SHA256_HKDF_EXPAND */ - -#endif /*!OPENSSL_CRYPTO_LIB */
\ No newline at end of file |