Fix: Add check for invalid input argument

code/AssetLib/MD5/MD5Parser.cpp

@@ -3,7 +3,7 @@
 Open Asset Import Library (assimp)
 ---------------------------------------------------------------------------
 
-Copyright (c) 2006-2022, assimp team
+Copyright (c) 2006-2023, assimp team
 
 All rights reserved.
 
@@ -87,7 +87,7 @@ MD5Parser::MD5Parser(char *_buffer, unsigned int _fileSize) : buffer(_buffer), b
 
 // ------------------------------------------------------------------------------------------------
 // Report error to the log stream
-/*static*/ AI_WONT_RETURN void MD5Parser::ReportError(const char *error, unsigned int line) {
+AI_WONT_RETURN void MD5Parser::ReportError(const char *error, unsigned int line) {
     char szBuffer[1024];
     ::ai_snprintf(szBuffer, 1024, "[MD5] Line %u: %s", line, error);
     throw DeadlyImportError(szBuffer);
@@ -95,7 +95,7 @@ MD5Parser::MD5Parser(char *_buffer, unsigned int _fileSize) : buffer(_buffer), b
 
 // ------------------------------------------------------------------------------------------------
 // Report warning to the log stream
-/*static*/ void MD5Parser::ReportWarning(const char *warn, unsigned int line) {
+void MD5Parser::ReportWarning(const char *warn, unsigned int line) {
     char szBuffer[1024];
     ::snprintf(szBuffer, sizeof(szBuffer), "[MD5] Line %u: %s", line, warn);
     ASSIMP_LOG_WARN(szBuffer);
@@ -122,8 +122,8 @@ void MD5Parser::ParseHeader() {
     // print the command line options to the console
     // FIX: can break the log length limit, so we need to be careful
     char *sz = buffer;
-    while (!IsLineEnd(*buffer++))
-        ;
+    while (!IsLineEnd(*buffer++));
+    
     ASSIMP_LOG_INFO(std::string(sz, std::min((uintptr_t)MAX_LOG_MESSAGE_LENGTH, (uintptr_t)(buffer - sz))));
     SkipSpacesAndLineEnd();
 }

code/AssetLib/MD5/MD5Parser.h

@@ -2,8 +2,7 @@
 Open Asset Import Library (assimp)
 ----------------------------------------------------------------------
 
-Copyright (c) 2006-2022, assimp team
-
+Copyright (c) 2006-2023, assimp team
 
 All rights reserved.
 
@@ -93,7 +92,7 @@ struct Section {
     std::string mName;
 
     //! For global elements: the value of the element as string
-    //! Iif !length() the section is not a global element
+    //! if !length() the section is not a global element
     std::string mGlobalValue;
 };
 
@@ -349,7 +348,6 @@ public:
      */
     MD5Parser(char* buffer, unsigned int fileSize);
 
-
     // -------------------------------------------------------------------
     /** Report a specific error message and throw an exception
      *  @param error Error message to be reported
@@ -364,47 +362,47 @@ public:
      */
     static void ReportWarning(const char* warn, unsigned int line);
 
-
+    // -------------------------------------------------------------------
+    /** Report a specific error
+     *  @param error Error message to be reported
+     */
     AI_WONT_RETURN void ReportError (const char* error) AI_WONT_RETURN_SUFFIX;
 
-    void ReportWarning (const char* warn) {
-        return ReportWarning(warn, lineNumber);
-    }
+    // -------------------------------------------------------------------
+    /** Report a specific warning
+     *  @param error Warn message to be reported
+     */
+    void ReportWarning (const char* warn);
 
     //! List of all sections which have been read
     SectionList mSections;
 
 private:
-    // -------------------------------------------------------------------
-    /** Parses a file section. The current file pointer must be outside
-     *  of a section.
-     *  @param out Receives the section data
-     *  @return true if the end of the file has been reached
-     *  @throws ImportErrorException if an error occurs
-     */
     bool ParseSection(Section& out);
-
-    // -------------------------------------------------------------------
-    /** Parses the file header
-     *  @throws ImportErrorException if an error occurs
-     */
     void ParseHeader();
-
     bool SkipLine(const char* in, const char** out);
     bool SkipLine( );
     bool SkipSpacesAndLineEnd( const char* in, const char** out);
     bool SkipSpacesAndLineEnd();
     bool SkipSpaces();
 
+private:
     char* buffer;
     char* bufferEnd;
     unsigned int fileSize;
     unsigned int lineNumber;
 };
 
+// -------------------------------------------------------------------
+inline void MD5Parser::ReportWarning (const char* warn) {
+    return ReportWarning(warn, lineNumber);
+}
+
+// -------------------------------------------------------------------
 inline void MD5Parser::ReportError(const char* error) {
     ReportError(error, lineNumber);
 }
+
 // -------------------------------------------------------------------
 inline bool MD5Parser::SkipLine(const char* in, const char** out) {
     ++lineNumber;
@@ -418,8 +416,12 @@ inline bool MD5Parser::SkipLine( ) {
 
 // -------------------------------------------------------------------
 inline bool MD5Parser::SkipSpacesAndLineEnd( const char* in, const char** out) {
-    bool bHad = false;
-    bool running = true;
+    if (in == bufferEnd) {
+        *out = in;
+        return false;
+    }
+    
+    bool bHad = false, running = true;
     while (running) {
         if( *in == '\r' || *in == '\n') {
             // we open files in binary mode, so there could be \r\n sequences ...
@@ -427,9 +429,11 @@ inline bool MD5Parser::SkipSpacesAndLineEnd( const char* in, const char** out) {
                 bHad = true;
                 ++lineNumber;
             }
+        } else if (*in == '\t' || *in == ' ') {
+            bHad = false;
+        } else {
+            break;
         }
-        else if (*in == '\t' || *in == ' ')bHad = false;
-        else break;
         ++in;
         if (in == bufferEnd) {
             break;