Separate CryptoVerifyImpl into its own file.

chrome/common/extensions/api/networking_private/networking_private_crypto.h

 // Copyright 2014 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 CHROME_COMMON_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_CRYPTO_H_
 #define CHROME_COMMON_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_CRYPTO_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 
-// Implementation of Crypto support for networking private API.
-// Based on chromeos_public//src/platform/shill/shims/crypto_util.cc
-class NetworkingPrivateCrypto {
- public:
-  NetworkingPrivateCrypto();
-  ~NetworkingPrivateCrypto();
+namespace networking_private_crypto {
 
-  // Verify that credentials described by |certificate| and |signed_data| are
-  // valid.
-  //
-  // 1) The MAC address listed in the certificate matches |connected_mac|.
-  // 2) The certificate is a valid PEM encoded certificate signed by trusted CA.
-  // 3) |signature| is a valid signature for |data|, using the public key in
-  // |certificate|
-  bool VerifyCredentials(const std::string& certificate,
-                         const std::string& signature,
-                         const std::string& data,
-                         const std::string& connected_mac);
+// Verify that the credentials described by |certificate| and |signed_data|
+// are valid as follows:
+// 1) The MAC address listed in the certificate matches |connected_mac|.
+// 2) The certificate is a valid PEM encoded certificate signed by trusted CA.
+// 3) |signature| is a valid signature for |data|, using the public key in
+// |certificate|
+bool VerifyCredentials(const std::string& certificate,
+                       const std::string& signature,
+                       const std::string& data,
+                       const std::string& connected_mac);
 
-  // Encrypt |data| with |public_key|. |public_key| is a DER-encoded
-  // RSAPublicKey. |data| is some string of bytes that is smaller than the
-  // maximum length permissible for PKCS#1 v1.5 with a key of |public_key| size.
-  //
-  // Returns true on success, storing the encrypted result in
-  // |encrypted_output|.
-  bool EncryptByteString(const std::vector<uint8_t>& public_key,
-                         const std::string& data,
-                         std::vector<uint8_t>* encrypted_output);
+// Encrypt |data| with |public_key|. |public_key| is a DER-encoded
+// RSAPublicKey. |data| is some string of bytes that is smaller than the
+// maximum length permissible for PKCS#1 v1.5 with a key of |public_key| size.
+//
+// Returns true on success, storing the encrypted result in
+// |encrypted_output|.
+bool EncryptByteString(const std::vector<uint8_t>& public_key,
+                       const std::string& data,
+                       std::vector<uint8_t>* encrypted_output);
 
- private:
-  friend class NetworkingPrivateCryptoTest;
+// Decrypt |encrypted_data| with |private_key_pem|. |private_key_pem| is the
+// PKCS8 PEM-encoded private key. |encrypted_data| is data encrypted with
+// EncryptByteString. Used in NetworkingPrivateCryptoTest::EncryptString test.
+// Returns true on success, storing the decrypted result in
+// |decrypted_output|.
+bool DecryptByteString(const std::string& private_key_pem,
+                       const std::vector<uint8_t>& encrypted_data,
+                       std::string* decrypted_output);
 
-  // Decrypt |encrypted_data| with |private_key_pem|. |private_key_pem| is the
-  // PKCS8 PEM-encoded private key. |encrypted_data| is data encrypted with
-  // EncryptByteString. Used in NetworkingPrivateCryptoTest::EncryptString test.
-  //
-  // Returns true on success, storing the decrypted result in
-  // |decrypted_output|.
-  bool DecryptByteString(const std::string& private_key_pem,
-                         const std::vector<uint8_t>& encrypted_data,
-                         std::string* decrypted_output);
+// The trusted public key as a DER-encoded PKCS#1 RSAPublicKey

[pneubeck (no reviews), 2014/08/06 16:01:38]

nit: fits on one line?

What means "The" here? What is this specific public key used for / what's its
purpose?
I know you didn't change this part, but if you happen to know, please make this
comment a bit more verbose.

[stevenjb, 2014/08/06 16:52:14]

Made one line. I don't know how to clarify this comment.

+// structure.
+extern const uint8_t kTrustedCAPublicKeyDER[];
 
-  // The trusted public key as a DER-encoded PKCS#1 RSAPublicKey
-  // structure.
-  static const uint8_t kTrustedCAPublicKeyDER[];
+// The length of |kTrustedCAPublicKeyDER| in bytes.
+extern const size_t kTrustedCAPublicKeyDERLength;
 
-  // The length of |kTrustedCAPublicKeyDER| in bytes.
-  static const size_t kTrustedCAPublicKeyDERLength;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkingPrivateCrypto);
-};
+}  // namespace networking_private_crypto
 
 #endif  // CHROME_COMMON_EXTENSIONS_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_CRYPTO_H_