Allow a crypto::RSAPrivateKey object to be wrapped round a pre-existing

crypto/rsa_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_RSA_PRIVATE_KEY_H_
 #define CRYPTO_RSA_PRIVATE_KEY_H_
 
 #include "build/build_config.h"
 
 #include <list>
@@ skipping 198 matching lines @@
 
   // Import an existing public key, and then search for the private
   // half in the slot specified by |slot|. The format of the public
   // key blob is is an X509 SubjectPublicKeyInfo block. This can return
   // NULL if initialization fails or the private key cannot be found.
   // The caller takes ownership of the returned object, but nothing new
   // is created in the slot.
   static RSAPrivateKey* FindFromPublicKeyInfoInSlot(
       const std::vector<uint8>& input,
       PK11SlotInfo* slot);
+#elif defined(USE_OPENSSL)
+  // Create a new instance by referencing an existing private key
+  // structure.  Does not import the key.

[davidben, 2014/09/09 18:28:57]

Nit: What does "Does not import the key" mean in this context? I'm guessing this
is from the NSS one? I would maybe replace that with:

// Create a new instance from an existing EVP_PKEY, taking a
// reference to it. |key| must be an RSA key. Returns NULL on
// failure.

[dougsteed, 2014/09/09 21:05:47]

Done.

+  static RSAPrivateKey* CreateFromKey(EVP_PKEY* key);
+
 #endif
 
 #if defined(USE_OPENSSL)
   EVP_PKEY* key() { return key_; }
 #else
   SECKEYPrivateKey* key() { return key_; }
   SECKEYPublicKey* public_key() { return public_key_; }
 #endif
 
   // Creates a copy of the object.
@@ skipping 49 matching lines @@
   SECKEYPrivateKey* key_;
   SECKEYPublicKey* public_key_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(RSAPrivateKey);
 };
 
 }  // namespace crypto
 
 #endif  // CRYPTO_RSA_PRIVATE_KEY_H_