1 // Copyright 2013 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "crypto/hkdf.h"
12 #include "base/check.h"
13 #include "crypto/hmac.h"
14 #include "third_party/boringssl/src/include/openssl/digest.h"
15 #include "third_party/boringssl/src/include/openssl/hkdf.h"
19 std::string HkdfSha256(std::string_view secret,
20 std::string_view salt,
21 std::string_view info,
22 size_t derived_key_size) {
24 key.resize(derived_key_size);
26 reinterpret_cast<uint8_t*>(&key[0]), derived_key_size, EVP_sha256(),
27 reinterpret_cast<const uint8_t*>(secret.data()), secret.size(),
28 reinterpret_cast<const uint8_t*>(salt.data()), salt.size(),
29 reinterpret_cast<const uint8_t*>(info.data()), info.size());
34 std::vector<uint8_t> HkdfSha256(base::span<const uint8_t> secret,
35 base::span<const uint8_t> salt,
36 base::span<const uint8_t> info,
37 size_t derived_key_size) {
38 std::vector<uint8_t> ret;
39 ret.resize(derived_key_size);
41 ::HKDF(ret.data(), derived_key_size, EVP_sha256(), secret.data(),
42 secret.size(), salt.data(), salt.size(), info.data(), info.size());