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wininet: Avoid a crash on certain buffer size queries in HTTP_HttpQueryInfoW.

This commit is contained in:
Hans Leidekker 2008-10-06 15:48:28 +02:00 committed by Alexandre Julliard
parent 096fa3b9f5
commit 128b8a5e0c
1 changed files with 47 additions and 48 deletions
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57
dlls/wininet/http.c
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@ -115,9 +115,7 @@ static BOOL HTTP_InsertCustomHeader(LPWININETHTTPREQW lpwhr, LPHTTPHEADERW lpHdr
static INT HTTP_GetCustomHeaderIndex(LPWININETHTTPREQW lpwhr, LPCWSTR lpszField, INT index, BOOL Request);
static BOOL HTTP_DeleteCustomHeader(LPWININETHTTPREQW lpwhr, DWORD index);
static LPWSTR HTTP_build_req( LPCWSTR *list, int len );
static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD
dwInfoLevel, LPVOID lpBuffer, LPDWORD lpdwBufferLength, LPDWORD
lpdwIndex);
static BOOL HTTP_HttpQueryInfoW(LPWININETHTTPREQW, DWORD, LPVOID, LPDWORD, LPDWORD);
static BOOL HTTP_HandleRedirect(LPWININETHTTPREQW lpwhr, LPCWSTR lpszUrl);
static UINT HTTP_DecodeBase64(LPCWSTR base64, LPSTR bin);
static BOOL HTTP_VerifyValidHeader(LPWININETHTTPREQW lpwhr, LPCWSTR field);
@ -2167,7 +2165,7 @@ static const LPCWSTR header_lookup[] = {
/***********************************************************************
* HTTP_HttpQueryInfoW (internal)
*/
static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLevel,
static BOOL HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLevel,
LPVOID lpBuffer, LPDWORD lpdwBufferLength, LPDWORD lpdwIndex)
{
LPHTTPHEADERW lphttpHdr = NULL;
@ -2181,6 +2179,7 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
switch (level)
{
case HTTP_QUERY_CUSTOM:
if (!lpBuffer) return FALSE;
index = HTTP_GetCustomHeaderIndex(lpwhr, lpBuffer, requested_index, request_only);
break;
@ -2226,7 +2225,7 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
{
LPWSTR * ppszRawHeaderLines = HTTP_Tokenize(lpwhr->lpszRawHeaders, szCrLf);
DWORD i, size = 0;
LPWSTR pszString = (WCHAR*)lpBuffer;
LPWSTR pszString = lpBuffer;
for (i = 0; ppszRawHeaderLines[i]; i++)
size += strlenW(ppszRawHeaderLines[i]) + 1;
@ -2238,7 +2237,8 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
INTERNET_SetLastError(ERROR_INSUFFICIENT_BUFFER);
return FALSE;
}
if (pszString)
{
for (i = 0; ppszRawHeaderLines[i]; i++)
{
DWORD len = strlenW(ppszRawHeaderLines[i]);
@ -2246,9 +2246,8 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
pszString += len+1;
}
*pszString = '\0';
TRACE("returning data: %s\n", debugstr_wn((WCHAR*)lpBuffer, size));
TRACE("returning data: %s\n", debugstr_wn(lpBuffer, size));
}
*lpdwBufferLength = size * sizeof(WCHAR);
HTTP_FreeTokens(ppszRawHeaderLines);
@ -2264,11 +2263,12 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
INTERNET_SetLastError(ERROR_INSUFFICIENT_BUFFER);
return FALSE;
}
memcpy(lpBuffer, lpwhr->lpszStatusText, (len+1)*sizeof(WCHAR));
if (lpBuffer)
{
memcpy(lpBuffer, lpwhr->lpszStatusText, (len + 1) * sizeof(WCHAR));
TRACE("returning data: %s\n", debugstr_wn(lpBuffer, len));
}
*lpdwBufferLength = len * sizeof(WCHAR);
TRACE("returning data: %s\n", debugstr_wn((WCHAR*)lpBuffer, len));
return TRUE;
}
break;
@ -2282,11 +2282,12 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
INTERNET_SetLastError(ERROR_INSUFFICIENT_BUFFER);
return FALSE;
}
memcpy(lpBuffer, lpwhr->lpszVersion, (len+1)*sizeof(WCHAR));
if (lpBuffer)
{
memcpy(lpBuffer, lpwhr->lpszVersion, (len + 1) * sizeof(WCHAR));
TRACE("returning data: %s\n", debugstr_wn(lpBuffer, len));
}
*lpdwBufferLength = len * sizeof(WCHAR);
TRACE("returning data: %s\n", debugstr_wn((WCHAR*)lpBuffer, len));
return TRUE;
}
break;
@ -2314,14 +2315,13 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
(*lpdwIndex)++;
/* coalesce value to requested type */
if (dwInfoLevel & HTTP_QUERY_FLAG_NUMBER)
if (dwInfoLevel & HTTP_QUERY_FLAG_NUMBER && lpBuffer)
{
*(int *)lpBuffer = atoiW(lphttpHdr->lpszValue);
TRACE(" returning number: %d\n", *(int *)lpBuffer);
bSuccess = TRUE;
TRACE(" returning number : %d\n", *(int *)lpBuffer);
}
else if (dwInfoLevel & HTTP_QUERY_FLAG_SYSTEMTIME)
else if (dwInfoLevel & HTTP_QUERY_FLAG_SYSTEMTIME && lpBuffer)
{
time_t tmpTime;
struct tm tmpTM;
@ -2330,9 +2330,8 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
tmpTime = ConvertTimeString(lphttpHdr->lpszValue);
tmpTM = *gmtime(&tmpTime);
STHook = (SYSTEMTIME *) lpBuffer;
if(STHook==NULL)
return bSuccess;
STHook = (SYSTEMTIME *)lpBuffer;
if (!STHook) return bSuccess;
STHook->wDay = tmpTM.tm_mday;
STHook->wHour = tmpTM.tm_hour;
@ -2342,10 +2341,9 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
STHook->wMonth = tmpTM.tm_mon + 1;
STHook->wSecond = tmpTM.tm_sec;
STHook->wYear = tmpTM.tm_year;
bSuccess = TRUE;
TRACE(" returning time : %04d/%02d/%02d - %d - %02d:%02d:%02d.%02d\n",
TRACE(" returning time: %04d/%02d/%02d - %d - %02d:%02d:%02d.%02d\n",
STHook->wYear, STHook->wMonth, STHook->wDay, STHook->wDayOfWeek,
STHook->wHour, STHook->wMinute, STHook->wSecond, STHook->wMilliseconds);
}
@ -2359,12 +2357,13 @@ static BOOL WINAPI HTTP_HttpQueryInfoW( LPWININETHTTPREQW lpwhr, DWORD dwInfoLev
INTERNET_SetLastError(ERROR_INSUFFICIENT_BUFFER);
return bSuccess;
}
if (lpBuffer)
{
memcpy(lpBuffer, lphttpHdr->lpszValue, len);
TRACE(" returning string: %s\n", debugstr_w(lpBuffer));
}
*lpdwBufferLength = len - sizeof(WCHAR);
bSuccess = TRUE;
TRACE(" returning string : %s\n", debugstr_w(lpBuffer));
}
return bSuccess;
}