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/*
* Copyright 2015 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef RTC_BASE_RTC_CERTIFICATE_H_
#define RTC_BASE_RTC_CERTIFICATE_H_
#include <stdint.h>
#include <memory>
#include <string>
#include "absl/base/attributes.h"
#include "absl/strings/string_view.h"
#include "api/ref_counted_base.h"
#include "api/scoped_refptr.h"
#include "rtc_base/system/rtc_export.h"
namespace rtc {
class SSLCertChain;
class SSLCertificate;
class SSLIdentity;
// This class contains PEM strings of an RTCCertificate's private key and
// certificate and acts as a text representation of RTCCertificate. Certificates
// can be serialized and deserialized to and from this format, which allows for
// cloning and storing of certificates to disk. The PEM format is that of
// `SSLIdentity::PrivateKeyToPEMString` and `SSLCertificate::ToPEMString`, e.g.
// the string representations used by OpenSSL.
class RTCCertificatePEM {
public:
RTCCertificatePEM(absl::string_view private_key,
absl::string_view certificate)
: private_key_(private_key), certificate_(certificate) {}
const std::string& private_key() const { return private_key_; }
const std::string& certificate() const { return certificate_; }
private:
std::string private_key_;
std::string certificate_;
};
// A thin abstraction layer between "lower level crypto stuff" like
// SSLCertificate and WebRTC usage. Takes ownership of some lower level objects,
// reference counting protects these from premature destruction.
class RTC_EXPORT RTCCertificate final
: public RefCountedNonVirtual<RTCCertificate> {
public:
// Takes ownership of `identity`.
static scoped_refptr<RTCCertificate> Create(
std::unique_ptr<SSLIdentity> identity);
// Returns the expiration time in ms relative to epoch, 1970-01-01T00:00:00Z.
uint64_t Expires() const;
// Checks if the certificate has expired, where `now` is expressed in ms
// relative to epoch, 1970-01-01T00:00:00Z.
bool HasExpired(uint64_t now) const;
const SSLCertificate& GetSSLCertificate() const;
const SSLCertChain& GetSSLCertificateChain() const;
// TODO(hbos): If possible, remove once RTCCertificate and its
// GetSSLCertificate() is used in all relevant places. Should not pass around
// raw SSLIdentity* for the sake of accessing SSLIdentity::certificate().
// However, some places might need SSLIdentity* for its public/private key...
SSLIdentity* identity() const { return identity_.get(); }
// To/from PEM, a text representation of the RTCCertificate.
RTCCertificatePEM ToPEM() const;
// Can return nullptr if the certificate is invalid.
static scoped_refptr<RTCCertificate> FromPEM(const RTCCertificatePEM& pem);
bool operator==(const RTCCertificate& certificate) const;
bool operator!=(const RTCCertificate& certificate) const;
protected:
explicit RTCCertificate(SSLIdentity* identity);
friend class RefCountedNonVirtual<RTCCertificate>;
~RTCCertificate();
private:
// The SSLIdentity is the owner of the SSLCertificate. To protect our
// GetSSLCertificate() we take ownership of `identity_`.
const std::unique_ptr<SSLIdentity> identity_;
};
} // namespace rtc
#endif // RTC_BASE_RTC_CERTIFICATE_H_
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