Revert of Refactoring of Cast-related crypto code

extensions/common/cast/cast_cert_validator.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 EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_
-#define EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_
-
-#include <string>
-#include <vector>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/strings/string_piece.h"
-
-namespace extensions {
-namespace core_api {
-namespace cast_crypto {
-
-// Status of a certificate or certificate verification operation.
-struct VerificationResult {
-  // Mapped to extensions::core_api::cast_channel::AuthResult::ErrorType in
-  // cast_auto_util.cc. Update the mapping code when modifying this enum.
-  enum ErrorType {
-    // Verification has succeeded.
-    ERROR_NONE = 0,
-    // There was a problem with the certificate, such as invalid or corrupt
-    // certificate data or invalid issuing certificate signature.
-    ERROR_CERT_INVALID,
-    // Certificate may be valid, but not trusted in this context.
-    ERROR_CERT_UNTRUSTED,
-    // Signature verification failed
-    ERROR_SIGNATURE_INVALID,
-    // Catch-all for internal errors that are not covered by the other error
-    // types.
-    ERROR_INTERNAL
-  };
-
-  // Constructs a VerificationResult that corresponds to success.
-  VerificationResult();
-
-  // Construct error-related objects
-  VerificationResult(const std::string& error_message, ErrorType error_type);
-  VerificationResult(const std::string& error_message,
-                     ErrorType error_type,
-                     int error_code);
-
-  bool Success() const { return error_type == ERROR_NONE; }
-  bool Failure() const { return error_type != ERROR_NONE; }
-
-  // Generates a string representation of this object for logging.
-  std::string GetLogString() const;
-
-  ErrorType error_type;
-  // Human-readable description of the problem if error_type != ERROR_NONE
-  std::string error_message;
-  // May contain the underlying crypto library error code.
-  int library_error_code;
-};
-
-// An object of this type is returned by the VerifyCert function, and can be
-// used for additional certificate-related operations, using the verified
-// certificate.
-class CertVerificationContext {
- public:
-  CertVerificationContext() {}
-  virtual ~CertVerificationContext() {}
-
-  // Use the public key from the verified certificate to verify a
-  // sha1WithRSAEncryption |signature| over arbitrary |data|. Both |signature|
-  // and |data| hold raw binary data.
-  virtual VerificationResult VerifySignatureOverData(
-      const base::StringPiece& signature,
-      const base::StringPiece& data) const = 0;
-
-  // Retrieve the Common Name attribute of the subject's distinguished name from
-  // the verified certificate, if present.  Returns an empty string if no Common
-  // Name is found.
-  virtual std::string GetCommonName() const = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CertVerificationContext);
-};
-
-// Verify a cast device certificate, using optional intermediate certificate
-// authority certificates. |context| will be populated with an instance of
-// CertVerificationContext, which allows to perform additional verification
-// steps as required.
-VerificationResult VerifyDeviceCert(
-    const base::StringPiece& device_cert,
-    const std::vector<std::string>& ica_certs,
-    scoped_ptr<CertVerificationContext>* context);
-
-}  // namespace cast_crypto
-}  // namespace core_api
-}  // namespace extensions
-
-#endif  // EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_