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// 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/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string_piece.h"
namespace extensions {
namespace api {
namespace cast_crypto {
// Status of a certificate or certificate verification operation.
struct VerificationResult {
// Mapped to extensions::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);
bool Success() const { return error_type == ERROR_NONE; }
bool Failure() const { return error_type != ERROR_NONE; }
ErrorType error_type;
// Human-readable description of the problem if error_type != ERROR_NONE
std::string error_message;
};
// An object of this type is returned by the VerifyDeviceCert 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);
// Sets trusted certificate authorities. Only exposed for tests.
bool SetTrustedCertificateAuthoritiesForTest(const std::string& keys,
const std::string& signature);
} // namespace cast_crypto
} // namespace api
} // namespace extensions
#endif // EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_
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