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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef NET_CERT_MULTI_LOG_CT_VERIFIER_H_
      6 #define NET_CERT_MULTI_LOG_CT_VERIFIER_H_
      7 
      8 #include <map>
      9 #include <string>
     10 
     11 #include "base/memory/linked_ptr.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "net/base/net_export.h"
     14 #include "net/cert/ct_verifier.h"
     15 #include "net/cert/signed_certificate_timestamp.h"
     16 
     17 namespace net {
     18 
     19 namespace ct {
     20 struct LogEntry;
     21 }  // namespace ct
     22 
     23 class CTLogVerifier;
     24 
     25 // A Certificate Transparency verifier that can verify Signed Certificate
     26 // Timestamps from multiple logs.
     27 // There should be a global instance of this class and for all known logs,
     28 // AddLog should be called with a CTLogVerifier (which is created from the
     29 // log's public key).
     30 class NET_EXPORT MultiLogCTVerifier : public CTVerifier {
     31  public:
     32   MultiLogCTVerifier();
     33   virtual ~MultiLogCTVerifier();
     34 
     35   void AddLog(scoped_ptr<CTLogVerifier> log_verifier);
     36 
     37   // CTVerifier implementation:
     38   virtual int Verify(X509Certificate* cert,
     39                      const std::string& stapled_ocsp_response,
     40                      const std::string& sct_list_from_tls_extension,
     41                      ct::CTVerifyResult* result,
     42                      const BoundNetLog& net_log) OVERRIDE;
     43 
     44  private:
     45   // Mapping from a log's ID to the verifier for this log.
     46   // A log's ID is the SHA-256 of the log's key, as defined in section 3.2.
     47   // of RFC6962.
     48   typedef std::map<std::string, linked_ptr<CTLogVerifier> > IDToLogMap;
     49 
     50   // Verify a list of SCTs from |encoded_sct_list| over |expected_entry|,
     51   // placing the verification results in |result|. The SCTs in the list
     52   // come from |origin| (as will be indicated in the origin field of each SCT).
     53   bool VerifySCTs(const std::string& encoded_sct_list,
     54                   const ct::LogEntry& expected_entry,
     55                   ct::SignedCertificateTimestamp::Origin origin,
     56                   ct::CTVerifyResult* result);
     57 
     58   // Verifies a single, parsed SCT against all logs.
     59   bool VerifySingleSCT(
     60       scoped_refptr<ct::SignedCertificateTimestamp> sct,
     61       const ct::LogEntry& expected_entry,
     62       ct::CTVerifyResult* result);
     63 
     64   IDToLogMap logs_;
     65 
     66   DISALLOW_COPY_AND_ASSIGN(MultiLogCTVerifier);
     67 };
     68 
     69 }  // namespace net
     70 
     71 #endif  // NET_CERT_MULTI_LOG_CT_VERIFIER_H_
     72