2005.05.31 23:46 "Re: [Tiff] hot to detect corrupt tif file", by Bruno Ledoux
Not sure exactly what you mean by "corrupt tiff file".
If you want to check that the CONTENT of a TIFF file hasn't been altered, you will have to use an external CRC method like MD5 as there is no such thing as a checksum in the TIFF format.
If you want to determine the file format, you can use TIFFOpen("file_to_check","r"). If it returns NULL it means the file is NOT a TIFF file. If you want to perform more detailed checks it going to be more complex considering the number of different tag formats.