Message Digests

A message digest is the output of a cryptographic hash function containing a string of bytes created by a one-way formula using the original message as input.

Message digests are designed to protect the integrity of a piece of data or media to detect changes and alterations to any part of a message.

Hashing Classes

Interface

All Hashing Functions available in this module implements the following interface:

SHA-1

Attention

NIST has deprecated SHA-1 in favor of the SHA-2 variants. New applications are strongly suggested to use SHA-2 over SHA-1.

SHA-2 family

Example

>>> from wolfcrypt.hashes import Sha256
>>>
>>> s = Sha256()
>>> s.update(b'wolf')
>>> s.update(b'crypt')
>>> s.digest()
b'\x96\xe0.{\x1c\xbc\xd6\xf1\x04\xfe\x1f\xdbFR\x02zU\x05\xb6\x86R\xb7\x00\x95\xc61\x8f\x9d\xce\r\x18D'
>>> s.hexdigest()
b'96e02e7b1cbcd6f104fe1fdb4652027a5505b68652b70095c6318f9dce0d1844'
>>>
>>> s.update(b'rocks')
>>> s.hexdigest()
b'e1a50df419d65715c48316bdc6a6f7f0485f4b26c1b107228faf17988b61c83f'
>>>
>>> Sha256(b'wolfcryptrocks').hexdigest()
b'e1a50df419d65715c48316bdc6a6f7f0485f4b26c1b107228faf17988b61c83f'
>>>
>>> Sha256.new(b'wolfcryptrocks').hexdigest()
b'e1a50df419d65715c48316bdc6a6f7f0485f4b26c1b107228faf17988b61c83f'