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oleaut32: Fix CLSIDToString behaviour when passed an invalid CLSID-string. 

In some cases, Excel 2007 apparently relies on CLSIDToString properly
parsing an "invalid" CLSID string where extra bytes are appended.
This commit is contained in:
David Hedberg 2011-04-28 15:11:03 +02:00 committed by Alexandre Julliard
parent d3e91603ce
commit ea14a6b2e7
2 changed files with 104 additions and 31 deletions
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78
dlls/ole32/compobj.c
View File

@ -1490,6 +1490,15 @@ HRESULT WINAPI CoCreateGuid(GUID *pguid)
return HRESULT_FROM_WIN32( status );
}
static inline BOOL is_valid_hex(WCHAR c)
{
if (!(((c >= '0') && (c <= '9')) ||
((c >= 'a') && (c <= 'f')) ||
((c >= 'A') && (c <= 'F'))))
return FALSE;
return TRUE;
}
/******************************************************************************
* CLSIDFromString [OLE32.@]
* IIDFromString [OLE32.@]
@ -1513,24 +1522,10 @@ static HRESULT __CLSIDFromString(LPCWSTR s, LPCLSID id)
int i;
BYTE table[256];
if (!s) {
if (!s || s[0]!='{') {
memset( id, 0, sizeof (CLSID) );
return S_OK;
}
/* validate the CLSID string */
if (strlenW(s) != 38)
if(!s) return S_OK;
return CO_E_CLASSSTRING;
if ((s[0]!='{') || (s[9]!='-') || (s[14]!='-') || (s[19]!='-') || (s[24]!='-') || (s[37]!='}'))
return CO_E_CLASSSTRING;
for (i=1; i<37; i++) {
if ((i == 9)||(i == 14)||(i == 19)||(i == 24)) continue;
if (!(((s[i] >= '0') && (s[i] <= '9')) ||
((s[i] >= 'a') && (s[i] <= 'f')) ||
((s[i] >= 'A') && (s[i] <= 'F'))))
return CO_E_CLASSSTRING;
}
TRACE("%s -> %p\n", debugstr_w(s), id);
@ -1548,22 +1543,40 @@ static HRESULT __CLSIDFromString(LPCWSTR s, LPCLSID id)
/* in form {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX} */
id->Data1 = (table[s[1]] << 28 | table[s[2]] << 24 | table[s[3]] << 20 | table[s[4]] << 16 |
table[s[5]] << 12 | table[s[6]] << 8 | table[s[7]] << 4 | table[s[8]]);
id->Data2 = table[s[10]] << 12 | table[s[11]] << 8 | table[s[12]] << 4 | table[s[13]];
id->Data3 = table[s[15]] << 12 | table[s[16]] << 8 | table[s[17]] << 4 | table[s[18]];
id->Data1 = 0;
for (i = 1; i < 9; i++) {
if (!is_valid_hex(s[i])) return CO_E_CLASSSTRING;
id->Data1 = (id->Data1 << 4) | table[s[i]];
}
if (s[9]!='-') return CO_E_CLASSSTRING;
/* these are just sequential bytes */
id->Data4[0] = table[s[20]] << 4 | table[s[21]];
id->Data4[1] = table[s[22]] << 4 | table[s[23]];
id->Data4[2] = table[s[25]] << 4 | table[s[26]];
id->Data4[3] = table[s[27]] << 4 | table[s[28]];
id->Data4[4] = table[s[29]] << 4 | table[s[30]];
id->Data4[5] = table[s[31]] << 4 | table[s[32]];
id->Data4[6] = table[s[33]] << 4 | table[s[34]];
id->Data4[7] = table[s[35]] << 4 | table[s[36]];
id->Data2 = 0;
for (i = 10; i < 14; i++) {
if (!is_valid_hex(s[i])) return CO_E_CLASSSTRING;
id->Data2 = (id->Data2 << 4) | table[s[i]];
}
if (s[14]!='-') return CO_E_CLASSSTRING;
return S_OK;
id->Data3 = 0;
for (i = 15; i < 19; i++) {
if (!is_valid_hex(s[i])) return CO_E_CLASSSTRING;
id->Data3 = (id->Data3 << 4) | table[s[i]];
}
if (s[19]!='-') return CO_E_CLASSSTRING;
for (i = 20; i < 37; i+=2) {
if (i == 24) {
if (s[i]!='-') return CO_E_CLASSSTRING;
i++;
}
if (!is_valid_hex(s[i]) || !is_valid_hex(s[i+1])) return CO_E_CLASSSTRING;
id->Data4[(i-20)/2] = table[s[i]] << 4 | table[s[i+1]];
}
if (s[37] == '}' && s[38] == '\0')
return S_OK;
return CO_E_CLASSSTRING;
}
/*****************************************************************************/
@ -1577,7 +1590,10 @@ HRESULT WINAPI CLSIDFromString(LPCOLESTR idstr, LPCLSID id )
ret = __CLSIDFromString(idstr, id);
if(ret != S_OK) { /* It appears a ProgID is also valid */
ret = CLSIDFromProgID(idstr, id);
CLSID tmp_id;
ret = CLSIDFromProgID(idstr, &tmp_id);
if(SUCCEEDED(ret))
*id = tmp_id;
}
return ret;
}

57
dlls/ole32/tests/compobj.c
View File

@ -190,6 +190,9 @@ static void test_CLSIDFromProgID(void)
static void test_CLSIDFromString(void)
{
CLSID clsid;
WCHAR wszCLSID_Broken[50];
UINT i;
HRESULT hr = CLSIDFromString(wszCLSID_StdFont, &clsid);
ok_ole_success(hr, "CLSIDFromString");
ok(IsEqualCLSID(&clsid, &CLSID_StdFont), "clsid wasn't equal to CLSID_StdFont\n");
@ -197,6 +200,60 @@ static void test_CLSIDFromString(void)
hr = CLSIDFromString(NULL, &clsid);
ok_ole_success(hr, "CLSIDFromString");
ok(IsEqualCLSID(&clsid, &CLSID_NULL), "clsid wasn't equal to CLSID_NULL\n");
lstrcpyW(wszCLSID_Broken, wszCLSID_StdFont);
for(i = lstrlenW(wszCLSID_StdFont); i < 49; i++)
wszCLSID_Broken[i] = 'A';
wszCLSID_Broken[i] = '\0';
memset(&clsid, 0, sizeof(CLSID));
hr = CLSIDFromString(wszCLSID_Broken, &clsid);
ok(hr == CO_E_CLASSSTRING, "Got %08x\n", hr);
ok(IsEqualCLSID(&clsid, &CLSID_StdFont), "clsid wasn't equal to CLSID_StdFont\n");
wszCLSID_Broken[lstrlenW(wszCLSID_StdFont)-1] = 'A';
memset(&clsid, 0, sizeof(CLSID));
hr = CLSIDFromString(wszCLSID_Broken, &clsid);
ok(hr == CO_E_CLASSSTRING, "Got %08x\n", hr);
ok(IsEqualCLSID(&clsid, &CLSID_StdFont), "clsid wasn't equal to CLSID_StdFont\n");
wszCLSID_Broken[lstrlenW(wszCLSID_StdFont)] = '\0';
memset(&clsid, 0, sizeof(CLSID));
hr = CLSIDFromString(wszCLSID_Broken, &clsid);
ok(hr == CO_E_CLASSSTRING, "Got %08x\n", hr);
ok(IsEqualCLSID(&clsid, &CLSID_StdFont), "clsid wasn't equal to CLSID_StdFont\n");
wszCLSID_Broken[lstrlenW(wszCLSID_StdFont)-1] = '\0';
memset(&clsid, 0, sizeof(CLSID));
hr = CLSIDFromString(wszCLSID_Broken, &clsid);
ok(hr == CO_E_CLASSSTRING, "Got %08x\n", hr);
ok(IsEqualCLSID(&clsid, &CLSID_StdFont), "clsid wasn't equal to CLSID_StdFont\n");
memset(&clsid, 0xcc, sizeof(CLSID));
hr = CLSIDFromString(wszCLSID_Broken+1, &clsid);
ok(hr == CO_E_CLASSSTRING, "Got %08x\n", hr);
ok(IsEqualCLSID(&clsid, &CLSID_NULL), "clsid wasn't equal to CLSID_NULL\n");
wszCLSID_Broken[9] = '*';
memset(&clsid, 0xcc, sizeof(CLSID));
hr = CLSIDFromString(wszCLSID_Broken, &clsid);
ok(hr == CO_E_CLASSSTRING, "Got %08x\n", hr);
ok(clsid.Data1 == CLSID_StdFont.Data1, "Got %08x\n", clsid.Data1);
ok(clsid.Data2 == 0xcccc, "Got %04x\n", clsid.Data2);
wszCLSID_Broken[3] = '*';
memset(&clsid, 0xcc, sizeof(CLSID));
hr = CLSIDFromString(wszCLSID_Broken, &clsid);
ok(hr == CO_E_CLASSSTRING, "Got %08x\n", hr);
ok(clsid.Data1 == 0xb, "Got %08x\n", clsid.Data1);
ok(clsid.Data2 == 0xcccc, "Got %04x\n", clsid.Data2);
wszCLSID_Broken[3] = '\0';
memset(&clsid, 0xcc, sizeof(CLSID));
hr = CLSIDFromString(wszCLSID_Broken, &clsid);
ok(hr == CO_E_CLASSSTRING, "Got %08x\n", hr);
ok(clsid.Data1 == 0xb, "Got %08x\n", clsid.Data1);
ok(clsid.Data2 == 0xcccc, "Got %04x\n", clsid.Data2);
}
static void test_StringFromGUID2(void)