crypto.h

// SPDX-FileCopyrightText: AC SOFTWARE SP. Z O.O.
// SPDX-License-Identifier: GPL-2.0-or-later
 
#ifndef SRC_SUPLA_CRYPTO_H_
#define SRC_SUPLA_CRYPTO_H_
 
/*
 * Simple wrapper for cryptographic functions.
 */
 
#include <stdint.h>
#include <stddef.h>
 
namespace Supla {
 
namespace Crypto {
 
// Compares all size bytes without stopping at the first difference.
// Both buffers must contain at least size bytes; NULL is rejected.
// Timing may depend on size, which must not depend on secret contents.
bool constantTimeEqual(const void *left, const void *right, size_t size);
 
bool pbkdf2Sha256(const char *password,
                   const uint8_t *salt, size_t saltLen, uint32_t iterations,
                   uint8_t *derivedKey, size_t derivedKeyLen);
 
bool hmacSha256Hex(const char *key, size_t keyLen,
                const char *data, size_t dataLen,
                char *output, size_t outputLen);
 
};  // namespace Crypto
};  // namespace Supla
 
 
 
#endif  // SRC_SUPLA_CRYPTO_H_