net/cert/cert_verify_proc.h

   1 // Copyright (c) 2012 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_CERT_VERIFY_PROC_H_
   6 #define NET_CERT_CERT_VERIFY_PROC_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/gtest_prod_util.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "net/base/net_export.h"
  14 #include "net/cert/x509_cert_types.h"
  15
  16 namespace net {
  17
  18 class CertVerifyResult;
  19 class CRLSet;
  20 class X509Certificate;
  21 typedef std::vector<scoped_refptr<X509Certificate> > CertificateList;
  22
  23 // Class to perform certificate path building and verification for various
  24 // certificate uses. All methods of this class must be thread-safe, as they
  25 // may be called from various non-joinable worker threads.
  26 class NET_EXPORT CertVerifyProc
  27     : public base::RefCountedThreadSafe<CertVerifyProc> {
  28  public:
  29   // Creates and returns the default CertVerifyProc.
  30   static CertVerifyProc* CreateDefault();
  31
  32   // Verifies the certificate against the given hostname as an SSL server
  33   // certificate. Returns OK if successful or an error code upon failure.
  34   //
  35   // The |*verify_result| structure, including the |verify_result->cert_status|
  36   // bitmask, is always filled out regardless of the return value. If the
  37   // certificate has multiple errors, the corresponding status flags are set in
  38   // |verify_result->cert_status|, and the error code for the most serious
  39   // error is returned.
  40   //
  41   // |flags| is bitwise OR'd of VerifyFlags:
  42   //
  43   // If VERIFY_REV_CHECKING_ENABLED is set in |flags|, online certificate
  44   // revocation checking is performed (i.e. OCSP and downloading CRLs). CRLSet
  45   // based revocation checking is always enabled, regardless of this flag, if
  46   // |crl_set| is given.
  47   //
  48   // If VERIFY_EV_CERT is set in |flags| too, EV certificate verification is
  49   // performed.
  50   //
  51   // |crl_set| points to an optional CRLSet structure which can be used to
  52   // avoid revocation checks over the network.
  53   //
  54   // |additional_trust_anchors| lists certificates that can be trusted when
  55   // building a certificate chain, in addition to the anchors known to the
  56   // implementation.
  57   int Verify(X509Certificate* cert,
  58              const std::string& hostname,
  59              int flags,
  60              CRLSet* crl_set,
  61              const CertificateList& additional_trust_anchors,
  62              CertVerifyResult* verify_result);
  63
  64   // Returns true if the implementation supports passing additional trust
  65   // anchors to the Verify() call. The |additional_trust_anchors| parameter
  66   // passed to Verify() is ignored when this returns false.
  67   virtual bool SupportsAdditionalTrustAnchors() const = 0;
  68
  69  protected:
  70   CertVerifyProc();
  71   virtual ~CertVerifyProc();
  72
  73  private:
  74   friend class base::RefCountedThreadSafe<CertVerifyProc>;
  75   FRIEND_TEST_ALL_PREFIXES(CertVerifyProcTest, DigiNotarCerts);
  76   FRIEND_TEST_ALL_PREFIXES(CertVerifyProcTest, TestHasTooLongValidity);
  77
  78   // Performs the actual verification using the desired underlying
  79   // cryptographic library.
  80   virtual int VerifyInternal(X509Certificate* cert,
  81                              const std::string& hostname,
  82                              int flags,
  83                              CRLSet* crl_set,
  84                              const CertificateList& additional_trust_anchors,
  85                              CertVerifyResult* verify_result) = 0;
  86
  87   // Returns true if |cert| is explicitly blacklisted.
  88   static bool IsBlacklisted(X509Certificate* cert);
  89
  90   // IsPublicKeyBlacklisted returns true iff one of |public_key_hashes| (which
  91   // are hashes of SubjectPublicKeyInfo structures) is explicitly blocked.
  92   static bool IsPublicKeyBlacklisted(const HashValueVector& public_key_hashes);
  93
  94   // HasNameConstraintsViolation returns true iff one of |public_key_hashes|
  95   // (which are hashes of SubjectPublicKeyInfo structures) has name constraints
  96   // imposed on it and the names in |dns_names| are not permitted.
  97   static bool HasNameConstraintsViolation(
  98       const HashValueVector& public_key_hashes,
  99       const std::string& common_name,
 100       const std::vector<std::string>& dns_names,
 101       const std::vector<std::string>& ip_addrs);
 102
 103   // The CA/Browser Forum's Baseline Requirements specify maximum validity
 104   // periods (https://cabforum.org/Baseline_Requirements_V1.pdf):
 105   //
 106   // For certificates issued after 1 July 2012: 60 months.
 107   // For certificates issued after 1 April 2015: 39 months.
 108   //
 109   // For certificates issued before the BRs took effect, there were no
 110   // guidelines, but clamp them at a maximum of 10 year validity, with the
 111   // requirement they expire within 7 years after the effective date of the BRs
 112   // (i.e. by 1 July 2019).
 113   static bool HasTooLongValidity(const X509Certificate& cert);
 114
 115   DISALLOW_COPY_AND_ASSIGN(CertVerifyProc);
 116 };
 117
 118 }  // namespace net
 119
 120 #endif  // NET_CERT_CERT_VERIFY_PROC_H_