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BaseTools/GenVtf: Add/refine boundary checks for strcpy/strcat calls 

Add checks to ensure when the destination string buffer is of fixed
size, the strcpy/strcat functions calls will not access beyond the
boundary.

Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
This commit is contained in:
Hao Wu 2017-12-18 09:19:23 +08:00
parent fc42d0e890
commit 1c47ab0404
1 changed files with 37 additions and 6 deletions
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43
BaseTools/Source/C/GenVtf/GenVtf.c
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@ -362,10 +362,20 @@ Returns:
}
} else if (strnicmp (*TokenStr, "COMP_BIN", 8) == 0) {
TokenStr++;
strcpy (VtfInfo->CompBinName, *TokenStr);
if (strlen (*TokenStr) >= FILE_NAME_SIZE) {
Error (NULL, 0, 3000, "Invalid", "The 'COMP_BIN' name is too long.");
return ;
}
strncpy (VtfInfo->CompBinName, *TokenStr, FILE_NAME_SIZE - 1);
VtfInfo->CompBinName[FILE_NAME_SIZE - 1] = 0;
} else if (strnicmp (*TokenStr, "COMP_SYM", 8) == 0) {
TokenStr++;
strcpy (VtfInfo->CompSymName, *TokenStr);
if (strlen (*TokenStr) >= FILE_NAME_SIZE) {
Error (NULL, 0, 3000, "Invalid", "The 'COMP_SYM' name is too long.");
return ;
}
strncpy (VtfInfo->CompSymName, *TokenStr, FILE_NAME_SIZE - 1);
VtfInfo->CompSymName[FILE_NAME_SIZE - 1] = 0;
} else if (strnicmp (*TokenStr, "COMP_SIZE", 9) == 0) {
TokenStr++;
if (strnicmp (*TokenStr, "-", 1) == 0) {
@ -444,14 +454,24 @@ Returns:
if (SectionOptionFlag) {
if (stricmp (*TokenStr, "IA32_RST_BIN") == 0) {
TokenStr++;
strcpy (IA32BinFile, *TokenStr);
if (strlen (*TokenStr) >= FILE_NAME_SIZE) {
Error (NULL, 0, 3000, "Invalid", "The 'IA32_RST_BIN' name is too long.");
break;
}
strncpy (IA32BinFile, *TokenStr, FILE_NAME_SIZE - 1);
IA32BinFile[FILE_NAME_SIZE - 1] = 0;
}
}
if (SectionCompFlag) {
if (stricmp (*TokenStr, "COMP_NAME") == 0) {
TokenStr++;
strcpy (FileListPtr->CompName, *TokenStr);
if (strlen (*TokenStr) >= COMPONENT_NAME_SIZE) {
Error (NULL, 0, 3000, "Invalid", "The 'COMP_NAME' name is too long.");
break;
}
strncpy (FileListPtr->CompName, *TokenStr, COMPONENT_NAME_SIZE - 1);
FileListPtr->CompName[COMPONENT_NAME_SIZE - 1] = 0;
TokenStr++;
ParseAndUpdateComponents (FileListPtr);
}
@ -2240,9 +2260,20 @@ Returns:
//
// Use the file name minus extension as the base for tokens
//
strcpy (BaseToken, SourceFileName);
if (strlen (SourceFileName) >= MAX_LONG_FILE_PATH) {
fclose (SourceFile);
Error (NULL, 0, 2000, "Invalid parameter", "The source file name is too long.");
return EFI_ABORTED;
}
strncpy (BaseToken, SourceFileName, MAX_LONG_FILE_PATH - 1);
BaseToken[MAX_LONG_FILE_PATH - 1] = 0;
strtok (BaseToken, ". \t\n");
strcat (BaseToken, "__");
if (strlen (BaseToken) + strlen ("__") >= MAX_LONG_FILE_PATH) {
fclose (SourceFile);
Error (NULL, 0, 2000, "Invalid parameter", "The source file name is too long.");
return EFI_ABORTED;
}
strncat (BaseToken, "__", MAX_LONG_FILE_PATH - strlen (BaseToken) - 1);
//
// Open the destination file