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/*
* Copyright 2017 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "wabt/sha256.h"
#if HAVE_OPENSSL_SHA_H
#include <openssl/sha.h>
#else
#include "picosha2.h"
#endif
namespace wabt {
/**
* SHA-256 the "input" sv into the output "digest".
*
* Uses OpenSSL's libcrypto or vendored PicoSHA2.
*/
void sha256(std::string_view input, std::string& digest) {
digest.clear();
#if HAVE_OPENSSL_SHA_H
digest.resize(SHA256_DIGEST_LENGTH);
if (!SHA256(reinterpret_cast<const uint8_t*>(input.data()), input.size(),
reinterpret_cast<uint8_t*>(digest.data()))) {
// should not be possible to fail here, but check (and abort) just in case
abort();
}
#else
digest.resize(picosha2::k_digest_size);
picosha2::hash256(input, digest);
#endif
}
} // namespace wabt
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