GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: crypto/crypto_keys.h Lines: 42 77 54.5 %
Date: 2021-10-01 04:12:33 Branches: 10 30 33.3 %

Line Branch Exec Source
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#ifndef SRC_CRYPTO_CRYPTO_KEYS_H_
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#define SRC_CRYPTO_CRYPTO_KEYS_H_
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#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#include "crypto/crypto_util.h"
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#include "base_object.h"
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#include "env.h"
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#include "memory_tracker.h"
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#include "node_buffer.h"
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#include "node_worker.h"
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#include "v8.h"
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#include <openssl/evp.h>
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#include <memory>
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#include <string>
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namespace node {
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namespace crypto {
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enum PKEncodingType {
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  // RSAPublicKey / RSAPrivateKey according to PKCS#1.
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  kKeyEncodingPKCS1,
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  // PrivateKeyInfo or EncryptedPrivateKeyInfo according to PKCS#8.
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  kKeyEncodingPKCS8,
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  // SubjectPublicKeyInfo according to X.509.
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  kKeyEncodingSPKI,
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  // ECPrivateKey according to SEC1.
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  kKeyEncodingSEC1
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};
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enum PKFormatType {
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  kKeyFormatDER,
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  kKeyFormatPEM,
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  kKeyFormatJWK
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};
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enum KeyType {
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  kKeyTypeSecret,
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  kKeyTypePublic,
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  kKeyTypePrivate
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};
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enum KeyEncodingContext {
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  kKeyContextInput,
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  kKeyContextExport,
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  kKeyContextGenerate
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};
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enum class ParseKeyResult {
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  kParseKeyOk,
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  kParseKeyNotRecognized,
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  kParseKeyNeedPassphrase,
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  kParseKeyFailed
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};
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struct AsymmetricKeyEncodingConfig {
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  bool output_key_object_ = false;
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  PKFormatType format_ = kKeyFormatDER;
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  v8::Maybe<PKEncodingType> type_ = v8::Nothing<PKEncodingType>();
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};
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using PublicKeyEncodingConfig = AsymmetricKeyEncodingConfig;
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struct PrivateKeyEncodingConfig : public AsymmetricKeyEncodingConfig {
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  const EVP_CIPHER* cipher_;
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  // The ByteSource alone is not enough to distinguish between "no passphrase"
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  // and a zero-length passphrase (which can be a null pointer), therefore, we
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  // use a NonCopyableMaybe.
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  NonCopyableMaybe<ByteSource> passphrase_;
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};
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// This uses the built-in reference counter of OpenSSL to manage an EVP_PKEY
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// which is slightly more efficient than using a shared pointer and easier to
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// use.
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class ManagedEVPPKey : public MemoryRetainer {
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 public:
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  ManagedEVPPKey() : mutex_(std::make_shared<Mutex>()) {}
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  explicit ManagedEVPPKey(EVPKeyPointer&& pkey);
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  ManagedEVPPKey(const ManagedEVPPKey& that);
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  ManagedEVPPKey& operator=(const ManagedEVPPKey& that);
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  operator bool() const;
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  EVP_PKEY* get() const;
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  Mutex* mutex() const;
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  void MemoryInfo(MemoryTracker* tracker) const override;
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  SET_MEMORY_INFO_NAME(ManagedEVPPKey)
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  SET_SELF_SIZE(ManagedEVPPKey)
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  static PublicKeyEncodingConfig GetPublicKeyEncodingFromJs(
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      const v8::FunctionCallbackInfo<v8::Value>& args,
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      unsigned int* offset,
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      KeyEncodingContext context);
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  static NonCopyableMaybe<PrivateKeyEncodingConfig> GetPrivateKeyEncodingFromJs(
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      const v8::FunctionCallbackInfo<v8::Value>& args,
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      unsigned int* offset,
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      KeyEncodingContext context);
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  static ManagedEVPPKey GetParsedKey(Environment* env,
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                                     EVPKeyPointer&& pkey,
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                                     ParseKeyResult ret,
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                                     const char* default_msg);
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  static ManagedEVPPKey GetPublicOrPrivateKeyFromJs(
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    const v8::FunctionCallbackInfo<v8::Value>& args,
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    unsigned int* offset);
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  static ManagedEVPPKey GetPrivateKeyFromJs(
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      const v8::FunctionCallbackInfo<v8::Value>& args,
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      unsigned int* offset,
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      bool allow_key_object);
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  static v8::Maybe<bool> ToEncodedPublicKey(
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      Environment* env,
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      ManagedEVPPKey key,
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      const PublicKeyEncodingConfig& config,
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      v8::Local<v8::Value>* out);
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  static v8::Maybe<bool> ToEncodedPrivateKey(
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      Environment* env,
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      ManagedEVPPKey key,
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      const PrivateKeyEncodingConfig& config,
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      v8::Local<v8::Value>* out);
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 private:
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  size_t size_of_private_key() const;
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  size_t size_of_public_key() const;
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  EVPKeyPointer pkey_;
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  std::shared_ptr<Mutex> mutex_;
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};
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// Objects of this class can safely be shared among threads.
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class KeyObjectData : public MemoryRetainer {
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 public:
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  static std::shared_ptr<KeyObjectData> CreateSecret(ByteSource key);
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  static std::shared_ptr<KeyObjectData> CreateAsymmetric(
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      KeyType type,
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      const ManagedEVPPKey& pkey);
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  KeyType GetKeyType() const;
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  // These functions allow unprotected access to the raw key material and should
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  // only be used to implement cryptographic operations requiring the key.
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  ManagedEVPPKey GetAsymmetricKey() const;
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  const char* GetSymmetricKey() const;
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  size_t GetSymmetricKeySize() const;
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  void MemoryInfo(MemoryTracker* tracker) const override;
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  SET_MEMORY_INFO_NAME(KeyObjectData)
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  SET_SELF_SIZE(KeyObjectData)
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 private:
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  explicit KeyObjectData(ByteSource symmetric_key);
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  KeyObjectData(
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      KeyType type,
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      const ManagedEVPPKey& pkey);
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  const KeyType key_type_;
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  const ByteSource symmetric_key_;
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  const unsigned int symmetric_key_len_;
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  const ManagedEVPPKey asymmetric_key_;
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};
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class KeyObjectHandle : public BaseObject {
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 public:
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  static v8::Local<v8::Function> Initialize(Environment* env);
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  static v8::MaybeLocal<v8::Object> Create(Environment* env,
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                                           std::shared_ptr<KeyObjectData> data);
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  // TODO(tniessen): track the memory used by OpenSSL types
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  SET_NO_MEMORY_INFO()
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  SET_MEMORY_INFO_NAME(KeyObjectHandle)
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  SET_SELF_SIZE(KeyObjectHandle)
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  const std::shared_ptr<KeyObjectData>& Data();
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 protected:
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  static void New(const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void Init(const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void InitECRaw(const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void InitEDRaw(const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void InitJWK(const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void GetKeyDetail(const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void ExportJWK(const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void GetAsymmetricKeyType(
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      const v8::FunctionCallbackInfo<v8::Value>& args);
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  v8::Local<v8::Value> GetAsymmetricKeyType() const;
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  static void GetSymmetricKeySize(
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      const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void Export(const v8::FunctionCallbackInfo<v8::Value>& args);
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  v8::MaybeLocal<v8::Value> ExportSecretKey() const;
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  v8::MaybeLocal<v8::Value> ExportPublicKey(
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      const PublicKeyEncodingConfig& config) const;
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  v8::MaybeLocal<v8::Value> ExportPrivateKey(
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      const PrivateKeyEncodingConfig& config) const;
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  KeyObjectHandle(Environment* env,
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                  v8::Local<v8::Object> wrap);
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 private:
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  std::shared_ptr<KeyObjectData> data_;
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};
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class NativeKeyObject : public BaseObject {
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 public:
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  static void Initialize(Environment* env, v8::Local<v8::Object> target);
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  static void New(const v8::FunctionCallbackInfo<v8::Value>& args);
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  static void CreateNativeKeyObjectClass(
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      const v8::FunctionCallbackInfo<v8::Value>& args);
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  SET_NO_MEMORY_INFO()
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  SET_MEMORY_INFO_NAME(NativeKeyObject)
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  SET_SELF_SIZE(NativeKeyObject)
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  class KeyObjectTransferData : public worker::TransferData {
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   public:
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    explicit KeyObjectTransferData(const std::shared_ptr<KeyObjectData>& data)
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        : data_(data) {}
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    BaseObjectPtr<BaseObject> Deserialize(
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        Environment* env,
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        v8::Local<v8::Context> context,
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        std::unique_ptr<worker::TransferData> self) override;
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    SET_MEMORY_INFO_NAME(KeyObjectTransferData)
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    SET_SELF_SIZE(KeyObjectTransferData)
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    SET_NO_MEMORY_INFO()
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   private:
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    std::shared_ptr<KeyObjectData> data_;
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  };
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  BaseObject::TransferMode GetTransferMode() const override;
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  std::unique_ptr<worker::TransferData> CloneForMessaging() const override;
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 private:
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  NativeKeyObject(Environment* env,
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                  v8::Local<v8::Object> wrap,
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                  const std::shared_ptr<KeyObjectData>& handle_data)
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    : BaseObject(env, wrap),
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      handle_data_(handle_data) {
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    MakeWeak();
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  }
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  std::shared_ptr<KeyObjectData> handle_data_;
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};
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enum WebCryptoKeyFormat {
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  kWebCryptoKeyFormatRaw,
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  kWebCryptoKeyFormatPKCS8,
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  kWebCryptoKeyFormatSPKI,
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  kWebCryptoKeyFormatJWK
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};
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enum class WebCryptoKeyExportStatus {
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  OK,
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  INVALID_KEY_TYPE,
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  FAILED
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};
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template <typename KeyExportTraits>
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class KeyExportJob final : public CryptoJob<KeyExportTraits> {
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 public:
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  using AdditionalParams = typename KeyExportTraits::AdditionalParameters;
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  static void New(const v8::FunctionCallbackInfo<v8::Value>& args) {
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    Environment* env = Environment::GetCurrent(args);
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    CHECK(args.IsConstructCall());
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    CryptoJobMode mode = GetCryptoJobMode(args[0]);
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    CHECK(args[1]->IsUint32());  // Export Type
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    CHECK(args[2]->IsObject());  // KeyObject
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    WebCryptoKeyFormat format =
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        static_cast<WebCryptoKeyFormat>(args[1].As<v8::Uint32>()->Value());
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    KeyObjectHandle* key;
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    ASSIGN_OR_RETURN_UNWRAP(&key, args[2]);
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    CHECK_NOT_NULL(key);
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    AdditionalParams params;
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    if (KeyExportTraits::AdditionalConfig(args, 3, &params).IsNothing()) {
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      // The KeyExportTraits::AdditionalConfig is responsible for
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      // calling an appropriate THROW_CRYPTO_* variant reporting
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      // whatever error caused initialization to fail.
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      return;
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    }
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    new KeyExportJob<KeyExportTraits>(
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        env,
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        args.This(),
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        mode,
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        key->Data(),
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        format,
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        std::move(params));
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  }
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  static void Initialize(
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      Environment* env,
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      v8::Local<v8::Object> target) {
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    CryptoJob<KeyExportTraits>::Initialize(New, env, target);
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  }
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  KeyExportJob(
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      Environment* env,
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      v8::Local<v8::Object> object,
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      CryptoJobMode mode,
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      std::shared_ptr<KeyObjectData> key,
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      WebCryptoKeyFormat format,
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      AdditionalParams&& params)
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      : CryptoJob<KeyExportTraits>(
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            env,
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            object,
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            AsyncWrap::PROVIDER_KEYEXPORTREQUEST,
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            mode,
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            std::move(params)),
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        key_(key),
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        format_(format) {}
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  WebCryptoKeyFormat format() const { return format_; }
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  void DoThreadPoolWork() override {
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    const WebCryptoKeyExportStatus status =
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        KeyExportTraits::DoExport(
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            key_,
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            format_,
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            *CryptoJob<KeyExportTraits>::params(),
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            &out_);
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    if (status == WebCryptoKeyExportStatus::OK) {
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      // Success!
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      return;
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    }
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    CryptoErrorStore* errors = CryptoJob<KeyExportTraits>::errors();
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    errors->Capture();
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    if (errors->Empty()) {
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      switch (status) {
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        case WebCryptoKeyExportStatus::OK:
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          UNREACHABLE();
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          break;
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        case WebCryptoKeyExportStatus::INVALID_KEY_TYPE:
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          errors->Insert(NodeCryptoError::INVALID_KEY_TYPE);
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          break;
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        case WebCryptoKeyExportStatus::FAILED:
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          errors->Insert(NodeCryptoError::CIPHER_JOB_FAILED);
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          break;
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      }
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    }
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  }
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  v8::Maybe<bool> ToResult(
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      v8::Local<v8::Value>* err,
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      v8::Local<v8::Value>* result) override {
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    Environment* env = AsyncWrap::env();
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    CryptoErrorStore* errors = CryptoJob<KeyExportTraits>::errors();
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    if (out_.size() > 0) {
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      CHECK(errors->Empty());
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      *err = v8::Undefined(env->isolate());
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      *result = out_.ToArrayBuffer(env);
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      return v8::Just(!result->IsEmpty());
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    }
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    if (errors->Empty())
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      errors->Capture();
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    CHECK(!errors->Empty());
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    *result = v8::Undefined(env->isolate());
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    return v8::Just(errors->ToException(env).ToLocal(err));
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  }
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  SET_SELF_SIZE(KeyExportJob)
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  void MemoryInfo(MemoryTracker* tracker) const override {
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    tracker->TrackFieldWithSize("out", out_.size());
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    CryptoJob<KeyExportTraits>::MemoryInfo(tracker);
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  }
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 private:
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  std::shared_ptr<KeyObjectData> key_;
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  WebCryptoKeyFormat format_;
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  ByteSource out_;
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};
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WebCryptoKeyExportStatus PKEY_SPKI_Export(
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    KeyObjectData* key_data,
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    ByteSource* out);
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WebCryptoKeyExportStatus PKEY_PKCS8_Export(
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    KeyObjectData* key_data,
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    ByteSource* out);
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namespace Keys {
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void Initialize(Environment* env, v8::Local<v8::Object> target);
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}  // namespace Keys
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}  // namespace crypto
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}  // namespace node
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#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#endif  // SRC_CRYPTO_CRYPTO_KEYS_H_