dlls/msisip/main.c

   1 /*
   2  * Copyright 2008 Juan Lang
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20 #include <stdarg.h>
  21 #include "windef.h"
  22 #include "winbase.h"
  23 #include "wincrypt.h"
  24 #include "mssip.h"
  25 #define COBJMACROS
  26 #include "objbase.h"
  27 #include "initguid.h"
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(msisip);
  31
  32 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
  33 {
  34     TRACE("(0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
  35
  36     switch (fdwReason)
  37     {
  38         case DLL_WINE_PREATTACH:
  39             return FALSE;    /* prefer native version */
  40         case DLL_PROCESS_ATTACH:
  41             DisableThreadLibraryCalls(hinstDLL);
  42             break;
  43     }
  44
  45     return TRUE;
  46 }
  47
  48 static GUID mySubject = { 0x000c10f1, 0x0000, 0x0000,
  49  { 0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46 }};
  50
  51 /***********************************************************************
  52  *              DllRegisterServer (MSISIP.@)
  53  */
  54 HRESULT WINAPI DllRegisterServer(void)
  55 {
  56     static WCHAR msisip[] = { 'M','S','I','S','I','P','.','D','L','L',0 };
  57     static WCHAR getSignedDataMsg[] = { 'M','s','i','S','I','P','G','e','t',
  58      'S','i','g','n','e','d','D','a','t','a','M','s','g',0 };
  59     static WCHAR putSignedDataMsg[] = { 'M','s','i','S','I','P','P','u','t',
  60      'S','i','g','n','e','d','D','a','t','a','M','s','g',0 };
  61     static WCHAR createIndirectData[] = { 'M','s','i','S','I','P',
  62      'C','r','e','a','t','e','I','n','d','i','r','e','c','t','D','a','t','a',
  63      0 };
  64     static WCHAR verifyIndirectData[] = { 'M','s','i','S','I','P',
  65      'V','e','r','i','f','y','I','n','d','i','r','e','c','t','D','a','t','a',
  66      0 };
  67     static WCHAR removeSignedDataMsg[] = { 'M','s','i','S','I','P','R','e','m',
  68      'o','v','e','S','i','g','n','e','d','D','a','t','a','M','s','g', 0 };
  69     static WCHAR isMyTypeOfFile[] = { 'M','s','i','S','I','P',
  70      'I','s','M','y','T','y','p','e','O','f','F','i','l','e',0 };
  71
  72     SIP_ADD_NEWPROVIDER prov;
  73
  74     memset(&prov, 0, sizeof(prov));
  75     prov.cbStruct = sizeof(prov);
  76     prov.pwszDLLFileName = msisip;
  77     prov.pgSubject = &mySubject;
  78     prov.pwszGetFuncName = getSignedDataMsg;
  79     prov.pwszPutFuncName = putSignedDataMsg;
  80     prov.pwszCreateFuncName = createIndirectData;
  81     prov.pwszVerifyFuncName = verifyIndirectData;
  82     prov.pwszRemoveFuncName = removeSignedDataMsg;
  83     prov.pwszIsFunctionNameFmt2 = isMyTypeOfFile;
  84     prov.pwszGetCapFuncName = NULL;
  85     return CryptSIPAddProvider(&prov) ? S_OK : S_FALSE;
  86 }
  87
  88 /***********************************************************************
  89  *              DllUnregisterServer (MSISIP.@)
  90  */
  91 HRESULT WINAPI DllUnregisterServer(void)
  92 {
  93     CryptSIPRemoveProvider(&mySubject);
  94     return S_OK;
  95 }
  96
  97 /***********************************************************************
  98  *              MsiSIPGetSignedDataMsg  (MSISIP.@)
  99  */
 100 BOOL WINAPI MsiSIPGetSignedDataMsg(SIP_SUBJECTINFO *pSubjectInfo,
 101  DWORD *pdwEncodingType, DWORD dwIndex, DWORD *pcbSignedDataMsg,
 102  BYTE *pbSignedDataMsg)
 103 {
 104     static const WCHAR digitalSig[] = { 5,'D','i','g','i','t','a','l',
 105      'S','i','g','n','a','t','u','r','e',0 };
 106     BOOL ret = FALSE;
 107     IStorage *stg = NULL;
 108     HRESULT r;
 109     IStream *stm = NULL;
 110     BYTE hdr[2], len[sizeof(DWORD)];
 111     DWORD count, lenBytes, dataBytes;
 112
 113     TRACE("(%p %p %d %p %p)\n", pSubjectInfo, pdwEncodingType, dwIndex,
 114           pcbSignedDataMsg, pbSignedDataMsg);
 115
 116     r = StgOpenStorage(pSubjectInfo->pwsFileName, NULL,
 117      STGM_DIRECT|STGM_READ|STGM_SHARE_DENY_WRITE, NULL, 0, &stg);
 118     if (FAILED(r))
 119     {
 120         TRACE("couldn't open %s\n", debugstr_w(pSubjectInfo->pwsFileName));
 121         goto end;
 122     }
 123
 124     r = IStorage_OpenStream(stg, digitalSig, 0,
 125      STGM_READ|STGM_SHARE_EXCLUSIVE, 0, &stm);
 126     if (FAILED(r))
 127     {
 128         TRACE("couldn't find digital signature stream\n");
 129         goto freestorage;
 130     }
 131
 132     r = IStream_Read(stm, hdr, sizeof(hdr), &count);
 133     if (FAILED(r) || count != sizeof(hdr))
 134         goto freestream;
 135     if (hdr[0] != 0x30)
 136     {
 137         WARN("unexpected data in digital sig: 0x%02x%02x\n", hdr[0], hdr[1]);
 138         goto freestream;
 139     }
 140
 141     /* Read the asn.1 length from the stream.  Only supports definite-length
 142      * values, which DER-encoded signatures should be.
 143      */
 144     if (hdr[1] == 0x80)
 145     {
 146         WARN("indefinite-length encoding not supported!\n");
 147         goto freestream;
 148     }
 149     else if (hdr[1] & 0x80)
 150     {
 151         DWORD temp;
 152         LPBYTE ptr;
 153
 154         lenBytes = hdr[1] & 0x7f;
 155         if (lenBytes > sizeof(DWORD))
 156         {
 157             WARN("asn.1 length too long (%d)\n", lenBytes);
 158             goto freestream;
 159         }
 160         r = IStream_Read(stm, len, lenBytes, &count);
 161         if (FAILED(r) || count != lenBytes)
 162             goto freestream;
 163         dataBytes = 0;
 164         temp = lenBytes;
 165         ptr = len;
 166         while (temp--)
 167         {
 168             dataBytes <<= 8;
 169             dataBytes |= *ptr++;
 170         }
 171     }
 172     else
 173     {
 174         lenBytes = 0;
 175         dataBytes = hdr[1];
 176     }
 177
 178     if (!pbSignedDataMsg)
 179     {
 180         *pcbSignedDataMsg = 2 + lenBytes + dataBytes;
 181         ret = TRUE;
 182     }
 183     else if (*pcbSignedDataMsg < 2 + lenBytes + dataBytes)
 184     {
 185         SetLastError(ERROR_INSUFFICIENT_BUFFER);
 186         *pcbSignedDataMsg = 2 + lenBytes + dataBytes;
 187     }
 188     else
 189     {
 190         LPBYTE ptr = pbSignedDataMsg;
 191
 192         memcpy(ptr, hdr, sizeof(hdr));
 193         ptr += sizeof(hdr);
 194         if (lenBytes)
 195         {
 196             memcpy(ptr, len, lenBytes);
 197             ptr += lenBytes;
 198         }
 199         r = IStream_Read(stm, ptr, dataBytes, &count);
 200         if (SUCCEEDED(r) && count == dataBytes)
 201         {
 202             *pdwEncodingType = X509_ASN_ENCODING | PKCS_7_ASN_ENCODING;
 203             *pcbSignedDataMsg = 2 + lenBytes + dataBytes;
 204             ret = TRUE;
 205         }
 206     }
 207
 208 freestream:
 209     IStream_Release(stm);
 210 freestorage:
 211     IStorage_Release(stg);
 212 end:
 213
 214     TRACE("returning %d\n", ret);
 215     return ret;
 216 }
 217
 218 DEFINE_GUID(CLSID_MsiTransform, 0x000c1082,0x0000,0x0000,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46);
 219 DEFINE_GUID(CLSID_MsiDatabase,  0x000c1084,0x0000,0x0000,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46);
 220 DEFINE_GUID(CLSID_MsiPatch,     0x000c1086,0x0000,0x0000,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46);
 221
 222 /***********************************************************************
 223  *              MsiSIPIsMyTypeOfFile (MSISIP.@)
 224  */
 225 BOOL WINAPI MsiSIPIsMyTypeOfFile(WCHAR *name, GUID *subject)
 226 {
 227     BOOL ret = FALSE;
 228     IStorage *stg = NULL;
 229     HRESULT r;
 230
 231     TRACE("(%s, %p)\n", debugstr_w(name), subject);
 232
 233     r = StgOpenStorage(name, NULL, STGM_DIRECT|STGM_READ|STGM_SHARE_DENY_WRITE,
 234      NULL, 0, &stg);
 235     if (SUCCEEDED(r))
 236     {
 237         STATSTG stat;
 238
 239         r = IStorage_Stat(stg, &stat, STATFLAG_NONAME);
 240         if (SUCCEEDED(r))
 241         {
 242             if (IsEqualGUID(&stat.clsid, &CLSID_MsiDatabase) ||
 243              IsEqualGUID(&stat.clsid, &CLSID_MsiPatch) ||
 244              IsEqualGUID(&stat.clsid, &CLSID_MsiTransform))
 245             {
 246                 ret = TRUE;
 247                 *subject = mySubject;
 248             }
 249         }
 250         IStorage_Release(stg);
 251     }
 252     return ret;
 253 }