net/cert/x509_util.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_X509_UTIL_H_
   6 #define NET_CERT_X509_UTIL_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/time/time.h"
  12 #include "net/base/net_export.h"
  13
  14 namespace crypto {
  15 class ECPrivateKey;
  16 class RSAPrivateKey;
  17 }
  18
  19 namespace net {
  20
  21 class X509Certificate;
  22
  23 namespace x509_util {
  24
  25 // Returns true if the times can be used to create an X.509 certificate.
  26 // Certificates can accept dates from Jan 1st, 1 to Dec 31, 9999.  A bug in NSS
  27 // limited the range to 1950-9999
  28 // (https://bugzilla.mozilla.org/show_bug.cgi?id=786531).  This function will
  29 // return whether it is supported by the currently used crypto library.
  30 NET_EXPORT_PRIVATE bool IsSupportedValidityRange(base::Time not_valid_before,
  31                                                  base::Time not_valid_after);
  32
  33 // Creates a server bound certificate containing the public key in |key|.
  34 // Domain, serial number and validity period are given as
  35 // parameters. The certificate is signed by the private key in |key|.
  36 // The hashing algorithm for the signature is SHA-1.
  37 //
  38 // See Internet Draft draft-balfanz-tls-obc-00 for more details:
  39 // http://tools.ietf.org/html/draft-balfanz-tls-obc-00
  40 NET_EXPORT_PRIVATE bool CreateDomainBoundCertEC(
  41     crypto::ECPrivateKey* key,
  42     const std::string& domain,
  43     uint32 serial_number,
  44     base::Time not_valid_before,
  45     base::Time not_valid_after,
  46     std::string* der_cert);
  47
  48 // Create a self-signed certificate containing the public key in |key|.
  49 // Subject, serial number and validity period are given as parameters.
  50 // The certificate is signed by the private key in |key|. The hashing
  51 // algorithm for the signature is SHA-1.
  52 //
  53 // |subject| is a distinguished name defined in RFC4514.
  54 //
  55 // An example:
  56 // CN=Michael Wong,O=FooBar Corporation,DC=foobar,DC=com
  57 //
  58 // SECURITY WARNING
  59 //
  60 // Using self-signed certificates has the following security risks:
  61 // 1. Encryption without authentication and thus vulnerable to
  62 //    man-in-the-middle attacks.
  63 // 2. Self-signed certificates cannot be revoked.
  64 //
  65 // Use this certificate only after the above risks are acknowledged.
  66 NET_EXPORT bool CreateSelfSignedCert(crypto::RSAPrivateKey* key,
  67                                      const std::string& subject,
  68                                      uint32 serial_number,
  69                                      base::Time not_valid_before,
  70                                      base::Time not_valid_after,
  71                                      std::string* der_cert);
  72
  73 // Comparator for use in STL algorithms that will sort client certificates by
  74 // order of preference.
  75 // Returns true if |a| is more preferable than |b|, allowing it to be used
  76 // with any algorithm that compares according to strict weak ordering.
  77 //
  78 // Criteria include:
  79 // - Prefer certificates that have a longer validity period (later
  80 //   expiration dates)
  81 // - If equal, prefer certificates that were issued more recently
  82 // - If equal, prefer shorter chains (if available)
  83 class NET_EXPORT_PRIVATE ClientCertSorter {
  84  public:
  85   ClientCertSorter();
  86
  87   bool operator()(
  88       const scoped_refptr<X509Certificate>& a,
  89       const scoped_refptr<X509Certificate>& b) const;
  90
  91  private:
  92   base::Time now_;
  93 };
  94
  95 } // namespace x509_util
  96
  97 } // namespace net
  98
  99 #endif  // NET_CERT_X509_UTIL_H_