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- /* Copyright (C) 2014 OSCAR lab, Stony Brook University
- Copyright (C) 2017 Fortanix, Inc.
- This file is part of Graphene Library OS.
- Graphene Library OS is free software: you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- as published by the Free Software Foundation, either version 3 of the
- License, or (at your option) any later version.
- Graphene Library OS 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 General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- /*
- * Cryptographic primitive abstractions. This layer provides a way to
- * change the crypto library without changing the rest of Graphene code
- * by providing a small crypto library adaptor implementing these methods.
- */
- #ifndef PAL_CRYPTO_H
- #define PAL_CRYPTO_H
- /*
- * You can change which crypto library will be used by changing this
- * define. Currently supported options:
- * - wolfSSL
- */
- #define PAL_CRYPTO_PROVIDER PAL_CRYPTO_MBEDTLS
- /* These cryptosystems are still unconditionally provided by WolfSSL. */
- #include "crypto/cmac.h"
- #include "crypto/dh.h"
- #include "crypto/rsa.h"
- #define PAL_CRYPTO_WOLFSSL 1
- #define PAL_CRYPTO_MBEDTLS 2
- #define SHA256_DIGEST_LEN 32
- #if PAL_CRYPTO_PROVIDER == PAL_CRYPTO_WOLFSSL
- #include "crypto/sha256.h"
- typedef SHA256 PAL_SHA256_CONTEXT;
- #elif PAL_CRYPTO_PROVIDER == PAL_CRYPTO_MBEDTLS
- #include "crypto/mbedtls/mbedtls/sha256.h"
- typedef mbedtls_sha256_context PAL_SHA256_CONTEXT;
- #else
- # error "Unknown crypto provider. Set PAL_CRYPTO_PROVIDER in pal_crypto.h"
- #endif
- int DkSHA256Init(PAL_SHA256_CONTEXT *context);
- int DkSHA256Update(PAL_SHA256_CONTEXT *context, const uint8_t *data,
- PAL_NUM len);
- int DkSHA256Final(PAL_SHA256_CONTEXT *context, uint8_t *output);
-
- #endif
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