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// Copyright 2015 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 COMPONENTS_GCM_DRIVER_CRYPTO_ENCRYPTION_HEADER_PARSERS_H_
#define COMPONENTS_GCM_DRIVER_CRYPTO_ENCRYPTION_HEADER_PARSERS_H_
#include <stdint.h>
#include <string>
#include <vector>
#include "base/strings/string_piece.h"
#include "net/http/http_util.h"
namespace gcm {
// Iterates over a header that follows the syntax of the Encryption HTTP header
// per the Encrypted Content-Encoding for HTTP draft. This header follows the
// #list syntax from the extended ABNF syntax defined in section 1.2 of RFC7230.
//
// https://tools.ietf.org/html/draft-thomson-http-encryption#section-3
// https://tools.ietf.org/html/rfc7230#section-1.2
class EncryptionHeaderIterator {
public:
EncryptionHeaderIterator(std::string::const_iterator header_begin,
std::string::const_iterator header_end);
~EncryptionHeaderIterator();
// Advances the iterator to the next header value, if any. Returns true if
// there is a next value. Use the keyid(), salt() and rs() methods to access
// the key-value pairs included in the header value.
bool GetNext();
const std::string& keyid() const {
return keyid_;
}
const std::string& salt() const {
return salt_;
}
uint64_t rs() const {
return rs_;
}
private:
net::HttpUtil::ValuesIterator iterator_;
std::string keyid_;
std::string salt_;
uint64_t rs_;
};
// Iterates over a header that follows the syntax of the Crypto-Key HTTP header
// per the Encrypted Content-Encoding for HTTP draft. This header follows the
// #list syntax from the extended ABNF syntax defined in section 1.2 of RFC7230.
//
// https://tools.ietf.org/html/draft-thomson-http-encryption#section-4
// https://tools.ietf.org/html/rfc7230#section-1.2
class CryptoKeyHeaderIterator {
public:
CryptoKeyHeaderIterator(std::string::const_iterator header_begin,
std::string::const_iterator header_end);
~CryptoKeyHeaderIterator();
// Advances the iterator to the next header value, if any. Returns true if
// there is a next value. Use the keyid(), aesgcm128() and dh() methods to
// access the key-value pairs included in the header value.
bool GetNext();
const std::string& keyid() const {
return keyid_;
}
const std::string& aesgcm128() const {
return aesgcm128_;
}
const std::string& dh() const {
return dh_;
}
private:
net::HttpUtil::ValuesIterator iterator_;
std::string keyid_;
std::string aesgcm128_;
std::string dh_;
};
} // namespace gcm
#endif // COMPONENTS_GCM_DRIVER_CRYPTO_ENCRYPTION_HEADER_PARSERS_H_
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