Vendor: Microsoft
OS: Microsoft only, Windows 2000, Windows XP, Windows 2003
Execution: CLI
Installation: Not Required.
MS support: Not supported.
Excellent command line tool. Can compute & verify cryptographic hash of files. Generates and verifies MD5 & SHA-1 hashes.
Aspects:
1. Support for MD5 & SHA-1, defaulting to MD5.
2. Output could be redirected to console or to an XML file.
3. Can generate hash values for all files in folders and sub folders.
Usage:
My personal opinion is a hash value should accompany any file being transferred.
Under the Hood #
Name of the file is not computed during generation of the hash value. That translates to the fact that, you can compute hash value and append the value to file name.
POC:
1. Compute hash value of a file.
2. Copy the hash value. “highlight – Right click – select Mark”.
3. Append the hash value to the filename.
4. Compute again the hash value for the file with changed name.
5. Right click and select find, paste the first generated in the “find dialog box”.
6. Search will affirm both hashes to be the same.
ILLUSTRATION
Workbook and technical article would soon follow to learn and use this tool.
Warning #
Use this utility at your own risk Not supported by Microsoft The above illustration can be used for lab environment Above document and suggestions are for students. Do not use it in production environment. Author is not liable for any loss pertaining to the suggestion or recommendation in the article. Use it “information/product” at your own risk.
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