Make //crypto factories return std::unique_ptr<>s

crypto/ec_private_key.h

 // Copyright (c) 2012 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.
 
 #ifndef CRYPTO_EC_PRIVATE_KEY_H_
 #define CRYPTO_EC_PRIVATE_KEY_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 12 matching lines @@
 
 // Encapsulates an elliptic curve (EC) private key. Can be used to generate new
 // keys, export keys to other formats, or to extract a public key.
 // TODO(mattm): make this and RSAPrivateKey implement some PrivateKey interface.
 // (The difference in types of key() and public_key() make this a little
 // tricky.)
 class CRYPTO_EXPORT ECPrivateKey {
  public:
   ~ECPrivateKey();
 
-  // Creates a new random instance. Can return NULL if initialization fails.
+  // Creates a new random instance. Can return nullptr if initialization fails.
   // The created key will use the NIST P-256 curve.
   // TODO(mattm): Add a curve parameter.
-  static ECPrivateKey* Create();
+  static std::unique_ptr<ECPrivateKey> Create();
 
   // Create a new instance by importing an existing private key. The format is
   // an ASN.1-encoded PrivateKeyInfo block from PKCS #8. This can return
   // nullptr if initialization fails.
   static std::unique_ptr<ECPrivateKey> CreateFromPrivateKeyInfo(
       const std::vector<uint8_t>& input);
 
   // Creates a new instance by importing an existing key pair.
   // The key pair is given as an ASN.1-encoded PKCS #8 EncryptedPrivateKeyInfo
   // block and an X.509 SubjectPublicKeyInfo block.
-  // Returns NULL if initialization fails.
+  // Returns nullptr if initialization fails.
   //
   // This function is deprecated. Use CreateFromPrivateKeyInfo for new code.
   // See https://crbug.com/603319.
-  static ECPrivateKey* CreateFromEncryptedPrivateKeyInfo(
+  static std::unique_ptr<ECPrivateKey> CreateFromEncryptedPrivateKeyInfo(
       const std::string& password,
       const std::vector<uint8_t>& encrypted_private_key_info,
       const std::vector<uint8_t>& subject_public_key_info);
 
   // Returns a copy of the object.
-  ECPrivateKey* Copy() const;
+  std::unique_ptr<ECPrivateKey> Copy() const;
 
   EVP_PKEY* key() { return key_; }
 
   // Exports the private key to a PKCS #8 PrivateKeyInfo block.
   bool ExportPrivateKey(std::vector<uint8_t>* output) const;
 
   // Exports the private key as an ASN.1-encoded PKCS #8 EncryptedPrivateKeyInfo
   // block and the public key as an X.509 SubjectPublicKeyInfo block.
   // The |password| and |iterations| are used as inputs to the key derivation
   // function for generating the encryption key.  PKCS #5 recommends a minimum
@@ skipping 17 matching lines @@
 
   EVP_PKEY* key_;
 
   DISALLOW_COPY_AND_ASSIGN(ECPrivateKey);
 };
 
 
 }  // namespace crypto
 
 #endif  // CRYPTO_EC_PRIVATE_KEY_H_