| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "peridot/bin/ledger/encryption/primitives/kdf.h" |
| |
| #include <lib/fxl/logging.h> |
| #include <openssl/digest.h> |
| #include <openssl/hkdf.h> |
| |
| namespace encryption { |
| |
| std::string HMAC256KDF(fxl::StringView data, size_t length) { |
| std::string output; |
| output.resize(length); |
| int result = HKDF(reinterpret_cast<uint8_t*>(&output[0]), output.size(), |
| EVP_sha256(), reinterpret_cast<const uint8_t*>(data.data()), |
| data.size(), nullptr, 0u, nullptr, 0u); |
| FXL_CHECK(result == 1); |
| return output; |
| } |
| |
| } // namespace encryption |