security/ct/CTUtils.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef CTUtils_h
   8 #define CTUtils_h
   9
  10 #include <memory>
  11
  12 #include "cryptohi.h"
  13 #include "keyhi.h"
  14 #include "keythi.h"
  15 #include "pk11pub.h"
  16 #include "mozpkix/Input.h"
  17 #include "mozpkix/Result.h"
  18
  19 #define MOZILLA_CT_ARRAY_LENGTH(x) (sizeof(x) / sizeof((x)[0]))
  20
  21 struct DeleteHelper {
  22   void operator()(CERTSubjectPublicKeyInfo* value) {
  23     SECKEY_DestroySubjectPublicKeyInfo(value);
  24   }
  25   void operator()(PK11Context* value) { PK11_DestroyContext(value, true); }
  26   void operator()(PK11SlotInfo* value) { PK11_FreeSlot(value); }
  27   void operator()(SECKEYPublicKey* value) { SECKEY_DestroyPublicKey(value); }
  28   void operator()(SECItem* value) { SECITEM_FreeItem(value, true); }
  29 };
  30
  31 template <class T>
  32 struct MaybeDeleteHelper {
  33   void operator()(T* ptr) {
  34     if (ptr) {
  35       DeleteHelper del;
  36       del(ptr);
  37     }
  38   }
  39 };
  40
  41 typedef std::unique_ptr<CERTSubjectPublicKeyInfo,
  42                         MaybeDeleteHelper<CERTSubjectPublicKeyInfo>>
  43     UniqueCERTSubjectPublicKeyInfo;
  44 typedef std::unique_ptr<PK11Context, MaybeDeleteHelper<PK11Context>>
  45     UniquePK11Context;
  46 typedef std::unique_ptr<PK11SlotInfo, MaybeDeleteHelper<PK11SlotInfo>>
  47     UniquePK11SlotInfo;
  48 typedef std::unique_ptr<SECKEYPublicKey, MaybeDeleteHelper<SECKEYPublicKey>>
  49     UniqueSECKEYPublicKey;
  50 typedef std::unique_ptr<SECItem, MaybeDeleteHelper<SECItem>> UniqueSECItem;
  51
  52 namespace mozilla {
  53 namespace ct {
  54
  55 // Reads a TLS-encoded variable length unsigned integer from |in|.
  56 // The integer is expected to be in big-endian order, which is used by TLS.
  57 // Note: checks if the output parameter overflows while reading.
  58 // |length| indicates the size (in bytes) of the serialized integer.
  59 template <size_t length, typename T>
  60 mozilla::pkix::Result ReadUint(mozilla::pkix::Reader& in, T& out);
  61
  62 // Reads a length-prefixed variable amount of bytes from |in|, updating |out|
  63 // on success. |prefixLength| indicates the number of bytes needed to represent
  64 // the length.
  65 template <size_t prefixLength>
  66 mozilla::pkix::Result ReadVariableBytes(mozilla::pkix::Reader& in,
  67                                         mozilla::pkix::Input& out);
  68
  69 }  // namespace ct
  70 }  // namespace mozilla
  71
  72 #endif  // CTUtils_h