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https://github.com/kidfromjupiter/nearby.git
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hai007
05ae5583f8
them with chromium ::crypto symbols of the same names. PiperOrigin-RevId: 684566882
66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <openssl/hkdf.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <memory>
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#include <string>
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#include <vector>
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#ifdef NEARBY_CHROMIUM
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#include "base/check.h"
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#elif defined(NEARBY_SWIFTPM)
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#include "internal/platform/logging.h"
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#else
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#include "absl/log/check.h" // nogncheck
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#endif
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#include "absl/strings/string_view.h"
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#include "internal/crypto_cros/hkdf.h"
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#include "internal/crypto_cros/hmac.h"
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#include <openssl/digest.h>
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namespace nearby::crypto {
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std::string HkdfSha256(absl::string_view secret, absl::string_view salt,
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absl::string_view info, size_t derived_key_size) {
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std::string key;
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key.resize(derived_key_size);
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int result = ::HKDF(
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reinterpret_cast<uint8_t*>(&key[0]), derived_key_size, EVP_sha256(),
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reinterpret_cast<const uint8_t*>(secret.data()), secret.size(),
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reinterpret_cast<const uint8_t*>(salt.data()), salt.size(),
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reinterpret_cast<const uint8_t*>(info.data()), info.size());
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DCHECK(result);
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return key;
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}
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std::vector<uint8_t> HkdfSha256(absl::Span<const uint8_t> secret,
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absl::Span<const uint8_t> salt,
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absl::Span<const uint8_t> info,
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size_t derived_key_size) {
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std::vector<uint8_t> ret;
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ret.resize(derived_key_size);
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int result =
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::HKDF(ret.data(), derived_key_size, EVP_sha256(), secret.data(),
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secret.size(), salt.data(), salt.size(), info.data(), info.size());
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DCHECK(result);
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return ret;
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}
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} // namespace nearby::crypto
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