Calculating hash value


certutil command is available for calculating hash value on windows.

certutil -hashfile file hashalgorithm

Here, I can specify MD5, SHA1, SHA256, SHA512 as hashalgorithm.


shasum command is available for calculating SHA hash value on macOS.

shasum -a sha_algorithm file

Here, I can speciry 1(SHA1), 256(SHA256), 512(SHA512) as sha_algorithm.
In case MD5, md5 command is available for calclating MD5 hash value.

md5 file

Note that 128 bit hash like MD5 and SHA1 are no longer secure. These should not be used as reliable digest. There was a question requires different 2 files where hashes conflict in CTF.
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