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- // Copyright 2015 The Chromium 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 "components/webcrypto/blink_key_handle.h"
- #include <utility>
- #include "base/check_op.h"
- #include "third_party/boringssl/src/include/openssl/evp.h"
- namespace webcrypto {
- namespace {
- class SymKey;
- class AsymKey;
- // Base class for wrapping OpenSSL keys in a type that can be passed to
- // Blink (blink::WebCryptoKeyHandle).
- class Key : public blink::WebCryptoKeyHandle {
- public:
- // Helpers to add some safety to casting.
- virtual SymKey* AsSymKey() { return nullptr; }
- virtual AsymKey* AsAsymKey() { return nullptr; }
- };
- class SymKey : public Key {
- public:
- explicit SymKey(base::span<const uint8_t> raw_key_data)
- : raw_key_data_(raw_key_data.begin(), raw_key_data.end()) {}
- SymKey(const SymKey&) = delete;
- SymKey& operator=(const SymKey&) = delete;
- SymKey* AsSymKey() override { return this; }
- const std::vector<uint8_t>& raw_key_data() const { return raw_key_data_; }
- private:
- std::vector<uint8_t> raw_key_data_;
- };
- class AsymKey : public Key {
- public:
- // After construction the |pkey| should NOT be mutated.
- explicit AsymKey(bssl::UniquePtr<EVP_PKEY> pkey) : pkey_(std::move(pkey)) {}
- AsymKey(const AsymKey&) = delete;
- AsymKey& operator=(const AsymKey&) = delete;
- AsymKey* AsAsymKey() override { return this; }
- // The caller should NOT mutate this EVP_PKEY.
- EVP_PKEY* pkey() { return pkey_.get(); }
- private:
- bssl::UniquePtr<EVP_PKEY> pkey_;
- };
- Key* GetKey(const blink::WebCryptoKey& key) {
- return static_cast<Key*>(key.Handle());
- }
- } // namespace
- const std::vector<uint8_t>& GetSymmetricKeyData(
- const blink::WebCryptoKey& key) {
- DCHECK_EQ(blink::kWebCryptoKeyTypeSecret, key.GetType());
- return GetKey(key)->AsSymKey()->raw_key_data();
- }
- EVP_PKEY* GetEVP_PKEY(const blink::WebCryptoKey& key) {
- DCHECK_NE(blink::kWebCryptoKeyTypeSecret, key.GetType());
- return GetKey(key)->AsAsymKey()->pkey();
- }
- blink::WebCryptoKeyHandle* CreateSymmetricKeyHandle(
- base::span<const uint8_t> key_bytes) {
- return new SymKey(key_bytes);
- }
- blink::WebCryptoKeyHandle* CreateAsymmetricKeyHandle(
- bssl::UniquePtr<EVP_PKEY> pkey) {
- return new AsymKey(std::move(pkey));
- }
- } // namespace webcrypto
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