/**
* Copyright (c) 2018 Cornell University.
*
* Author: Ted Yin <[email protected]>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _SALTICIDAE_CRYPTO_H
#define _SALTICIDAE_CRYPTO_H
#include "salticidae/type.h"
#include <openssl/sha.h>
namespace salticidae {
class SHA256 {
SHA256_CTX *ctx;
public:
SHA256(): ctx(new SHA256_CTX()) { reset(); }
~SHA256() { delete ctx; }
void reset() {
if (!SHA256_Init(ctx))
throw std::runtime_error("openssl SHA256 init error");
}
template<typename T>
void update(const T &data) {
update(reinterpret_cast<const uint8_t *>(&*data.begin()), data.size());
}
void update(const bytearray_t::const_iterator &it, size_t length) {
update(&*it, length);
}
void update(const uint8_t *ptr, size_t length) {
if (!SHA256_Update(ctx, ptr, length))
throw std::runtime_error("openssl SHA256 update error");
}
void _digest(bytearray_t &md) {
if (!SHA256_Final(&*md.begin(), ctx))
throw std::runtime_error("openssl SHA256 error");
}
void digest(bytearray_t &md) {
md.resize(32);
_digest(md);
}
bytearray_t digest() {
bytearray_t md(32);
_digest(md);
return std::move(md);
}
};
}
#endif