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     return CryptSIPAddProvider(&prov) ? S_OK : S_FALSE;
  85 }
  86
  87 /***********************************************************************
  88  *              DllUnregisterServer (MSISIP.@)
  89  */
  90 HRESULT WINAPI DllUnregisterServer(void)
  91 {
  92     CryptSIPRemoveProvider(&mySubject);
  93     return S_OK;
  94 }
  95
  96 /***********************************************************************
  97  *              MsiSIPGetSignedDataMsg  (MSISIP.@)
  98  */
  99 BOOL WINAPI MsiSIPGetSignedDataMsg(SIP_SUBJECTINFO *pSubjectInfo,
 100  DWORD *pdwEncodingType, DWORD dwIndex, DWORD *pcbSignedDataMsg,
 101  BYTE *pbSignedDataMsg)
 102 {
 103     static const WCHAR digitalSig[] = { 5,'D','i','g','i','t','a','l',
 104      'S','i','g','n','a','t','u','r','e',0 };
 105     BOOL ret = FALSE;
 106     IStorage *stg = NULL;
 107     HRESULT r;
 108     IStream *stm = NULL;
 109     BYTE hdr[2], len[sizeof(DWORD)];
 110     DWORD count, lenBytes, dataBytes;
 111
 112     TRACE("(%p %p %d %p %p)\n", pSubjectInfo, pdwEncodingType, dwIndex,
 113           pcbSignedDataMsg, pbSignedDataMsg);
 114
 115     r = StgOpenStorage(pSubjectInfo->pwsFileName, NULL,
 116      STGM_DIRECT|STGM_READ|STGM_SHARE_DENY_WRITE, NULL, 0, &stg);
 117     if (FAILED(r))
 118     {
 119         TRACE("couldn't open %s\n", debugstr_w(pSubjectInfo->pwsFileName));
 120         goto end;
 121     }
 122
 123     r = IStorage_OpenStream(stg, digitalSig, 0,
 124      STGM_READ|STGM_SHARE_EXCLUSIVE, 0, &stm);
 125     if (FAILED(r))
 126     {
 127         TRACE("couldn't find digital signature stream\n");
 128         goto freestorage;
 129     }
 130
 131     r = IStream_Read(stm, hdr, sizeof(hdr), &count);
 132     if (FAILED(r) || count != sizeof(hdr))
 133         goto freestream;
 134     if (hdr[0] != 0x30)
 135     {
 136         WARN("unexpected data in digital sig: 0x%02x%02x\n", hdr[0], hdr[1]);
 137         goto freestream;
 138     }
 139
 140     /* Read the asn.1 length from the stream.  Only supports definite-length
 141      * values, which DER-encoded signatures should be.
 142      */
 143     if (hdr[1] == 0x80)
 144     {
 145         WARN("indefinite-length encoding not supported!\n");
 146         goto freestream;
 147     }
 148     else if (hdr[1] & 0x80)
 149     {
 150         DWORD temp;
 151         LPBYTE ptr;
 152
 153         lenBytes = hdr[1] & 0x7f;
 154         if (lenBytes > sizeof(DWORD))
 155         {
 156             WARN("asn.1 length too long (%d)\n", lenBytes);
 157             goto freestream;
 158         }
 159         r = IStream_Read(stm, len, lenBytes, &count);
 160         if (FAILED(r) || count != lenBytes)
 161             goto freestream;
 162         dataBytes = 0;
 163         temp = lenBytes;
 164         ptr = len;
 165         while (temp--)
 166         {
 167             dataBytes <<= 8;
 168             dataBytes |= *ptr++;
 169         }
 170     }
 171     else
 172     {
 173         lenBytes = 0;
 174         dataBytes = hdr[1];
 175     }
 176
 177     if (!pbSignedDataMsg)
 178     {
 179         *pcbSignedDataMsg = 2 + lenBytes + dataBytes;
 180         ret = TRUE;
 181     }
 182     else if (*pcbSignedDataMsg < 2 + lenBytes + dataBytes)
 183     {
 184         SetLastError(ERROR_INSUFFICIENT_BUFFER);
 185         *pcbSignedDataMsg = 2 + lenBytes + dataBytes;
 186     }
 187     else
 188     {
 189         LPBYTE ptr = pbSignedDataMsg;
 190
 191         memcpy(ptr, hdr, sizeof(hdr));
 192         ptr += sizeof(hdr);
 193         if (lenBytes)
 194         {
 195             memcpy(ptr, len, lenBytes);
 196             ptr += lenBytes;
 197         }
 198         r = IStream_Read(stm, ptr, dataBytes, &count);
 199         if (SUCCEEDED(r) && count == dataBytes)
 200         {
 201             *pdwEncodingType = X509_ASN_ENCODING | PKCS_7_ASN_ENCODING;
 202             *pcbSignedDataMsg = 2 + lenBytes + dataBytes;
 203             ret = TRUE;
 204         }
 205     }
 206
 207 freestream:
 208     IStream_Release(stm);
 209 freestorage:
 210     IStorage_Release(stg);
 211 end:
 212
 213     TRACE("returning %d\n", ret);
 214     return ret;
 215 }
 216
 217 DEFINE_GUID(CLSID_MsiTransform, 0x000c1082,0x0000,0x0000,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46);
 218 DEFINE_GUID(CLSID_MsiDatabase,  0x000c1084,0x0000,0x0000,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46);
 219 DEFINE_GUID(CLSID_MsiPatch,     0x000c1086,0x0000,0x0000,0xc0,0x00,0x00,0x00,0x00,0x00,0x00,0x46);
 220
 221 /***********************************************************************
 222  *              MsiSIPIsMyTypeOfFile (MSISIP.@)
 223  */
 224 BOOL WINAPI MsiSIPIsMyTypeOfFile(WCHAR *name, GUID *subject)
 225 {
 226     BOOL ret = FALSE;
 227     IStorage *stg = NULL;
 228     HRESULT r;
 229
 230     TRACE("(%s, %p)\n", debugstr_w(name), subject);
 231
 232     r = StgOpenStorage(name, NULL, STGM_DIRECT|STGM_READ|STGM_SHARE_DENY_WRITE,
 233      NULL, 0, &stg);
 234     if (SUCCEEDED(r))
 235     {
 236         STATSTG stat;
 237
 238         r = IStorage_Stat(stg, &stat, STATFLAG_NONAME);
 239         if (SUCCEEDED(r))
 240         {
 241             if (IsEqualGUID(&stat.clsid, &CLSID_MsiDatabase) ||
 242              IsEqualGUID(&stat.clsid, &CLSID_MsiPatch) ||
 243              IsEqualGUID(&stat.clsid, &CLSID_MsiTransform))
 244             {
 245                 ret = TRUE;
 246                 *subject = mySubject;
 247             }
 248         }
 249         IStorage_Release(stg);
 250     }
 251     return ret;
 252 }