imagehlp: Implement ImageRemoveCertificate.

dlls/imagehlp/integrity.c

@@ -564,7 +564,81 @@ BOOL WINAPI ImageGetDigestStream(
  */
 BOOL WINAPI ImageRemoveCertificate(HANDLE FileHandle, DWORD Index)
 {
-  FIXME("(%p, %d): stub\n", FileHandle, Index);
-  SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
-  return FALSE;
+    DWORD size = 0, count = 0, sd_VirtualAddr = 0, offset = 0;
+    DWORD data_size = 0, cert_size = 0, cert_size_padded = 0, ret = 0;
+    LPVOID cert_data;
+    BOOL r;
+
+    TRACE("(%p, %d)\n", FileHandle, Index);
+
+    r = ImageEnumerateCertificates(FileHandle, CERT_SECTION_TYPE_ANY, &count, NULL, 0);
+
+    if ((!r) || (count == 0))
+        return FALSE;
+
+    if ((!IMAGEHLP_GetSecurityDirOffset(FileHandle, &sd_VirtualAddr, &size)) ||
+        (!IMAGEHLP_GetCertificateOffset(FileHandle, Index, &offset, &cert_size)))
+        return FALSE;
+
+    /* Ignore any padding we have, too */
+    if (cert_size % 8)
+        cert_size_padded = cert_size + (8 - (cert_size % 8));
+    else
+        cert_size_padded = cert_size;
+
+    data_size = size - (offset - sd_VirtualAddr) - cert_size_padded;
+
+    if (data_size == 0)
+    {
+        ret = SetFilePointer(FileHandle, sd_VirtualAddr, NULL, FILE_BEGIN);
+
+        if (ret == INVALID_SET_FILE_POINTER)
+            return FALSE;
+    }
+    else
+    {
+        cert_data = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, data_size);
+
+        if (!cert_data)
+            return FALSE;
+
+        ret = SetFilePointer(FileHandle, offset + cert_size_padded, NULL, FILE_BEGIN);
+
+        if (ret == INVALID_SET_FILE_POINTER)
+            goto error;
+
+        /* Read any subsequent certificates */
+        r = ReadFile(FileHandle, cert_data, data_size, &count, NULL);
+
+        if ((!r) || (count != data_size))
+            goto error;
+
+        SetFilePointer(FileHandle, offset, NULL, FILE_BEGIN);
+
+        /* Write them one index back */
+        r = WriteFile(FileHandle, cert_data, data_size, &count, NULL);
+
+        if ((!r) || (count != data_size))
+            goto error;
+
+        HeapFree(GetProcessHeap(), 0, cert_data);
+    }
+
+    /* If security directory is at end of file, trim the file */
+    if (GetFileSize(FileHandle, NULL) == sd_VirtualAddr + size)
+        SetEndOfFile(FileHandle);
+
+    if (count == 1)
+        r = IMAGEHLP_SetSecurityDirOffset(FileHandle, 0, 0);
+    else
+        r = IMAGEHLP_SetSecurityDirOffset(FileHandle, sd_VirtualAddr, size - cert_size_padded);
+
+    if (!r)
+        return FALSE;
+
+    return TRUE;
+
+error:
+    HeapFree(GetProcessHeap(), 0, cert_data);
+    return FALSE;
 }

dlls/imagehlp/tests/integrity.c

@@ -201,10 +201,10 @@ static void test_remove_certificate(void)
         return;
     }
 
-    todo_wine ok (pImageRemoveCertificate(hFile, 0), "Unable to remove certificate from file; err=%x\n", GetLastError());
+    ok (pImageRemoveCertificate(hFile, 0), "Unable to remove certificate from file; err=%x\n", GetLastError());
 
     /* Test to see if the certificate has actually been removed */
-    todo_wine ok(pImageGetCertificateHeader(hFile, 0, &cert) == FALSE, "Certificate header retrieval succeeded when it should have failed\n");
+    ok(pImageGetCertificateHeader(hFile, 0, &cert) == FALSE, "Certificate header retrieval succeeded when it should have failed\n");
 
     CloseHandle(hFile);
 }