net/cert/sha256_legacy_support_win.h

   1 // Copyright 2014 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_SHA256_LEGACY_SUPPORT_WIN_H_
   6 #define NET_CERT_SHA256_LEGACY_SUPPORT_WIN_H_
   7
   8 #include <windows.h>
   9
  10 #include "base/strings/string_piece.h"
  11 #include "crypto/wincrypt_shim.h"
  12 #include "net/base/net_export.h"
  13
  14 namespace net {
  15
  16 namespace sha256_interception {
  17
  18 typedef BOOL (WINAPI* CryptVerifyCertificateSignatureExFunc)(
  19     HCRYPTPROV_LEGACY provider,
  20     DWORD encoding_type,
  21     DWORD subject_type,
  22     void* subject_data,
  23     DWORD issuer_type,
  24     void* issuer_data,
  25     DWORD flags,
  26     void* extra);
  27
  28 // Interception function meant to be called whenever
  29 // CryptVerifyCertificateSignatureEx is called. Note that the calling
  30 // conventions do not match, as the caller is expected to ensure that their
  31 // interposed function handles the calling conventions and provides a pointer
  32 // to the original CryptVerifyCertificateSignatureEx (e.g. to handle parameters
  33 // and keys that are not supported).
  34 NET_EXPORT BOOL CryptVerifyCertificateSignatureExHook(
  35     CryptVerifyCertificateSignatureExFunc original_func,
  36     HCRYPTPROV_LEGACY provider,
  37     DWORD encoding_type,
  38     DWORD subject_type,
  39     void* subject_data,
  40     DWORD issuer_type,
  41     void* issuer_data,
  42     DWORD flags,
  43     void* extra);
  44
  45 // Returns true if |subject_type| a supported subject type for interception.
  46 bool IsSupportedSubjectType(DWORD subject_type);
  47
  48 // Returns true if |issuer_type| is a supported issuer type for interception.
  49 bool IsSupportedIssuerType(DWORD issuer_type);
  50
  51 // Returns the encoded form of |subject_data| or an empty StringPiece if not
  52 // supported.
  53 base::StringPiece GetSubjectSignature(DWORD subject_type,
  54                                       void* subject_data);
  55
  56 // Returns the public key of |issuer_data| or NULL if not supported.
  57 PCERT_PUBLIC_KEY_INFO GetIssuerPublicKey(DWORD issuer_type,
  58                                          void* issuer_data);
  59
  60 }  // namespace sha256_interception
  61
  62 }  // namespace net
  63
  64 #endif  // NET_CERT_SHA256_LEGACY_SUPPORT_WIN_H_