72 lines
1.6 KiB
ReStructuredText
72 lines
1.6 KiB
ReStructuredText
Message Digests
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===============
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.. module:: wolfcrypt.hashes
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A **message digest** is the output of a **cryptographic hash function**
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containing a string of bytes created by a **one-way formula** using the
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original message as input.
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Message digests are designed to protect the integrity of a piece of data or
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media to detect changes and alterations to any part of a message.
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Hashing Classes
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---------------
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Interface
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~~~~~~~~~
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All Hashing Functions available in this module implements the following
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interface:
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.. autoclass:: _Hash
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:members:
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SHA-1
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~~~~~
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.. attention::
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NIST has deprecated SHA-1 in favor of the SHA-2 variants. New applications
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are strongly suggested to use SHA-2 over SHA-1.
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.. autoclass:: Sha
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SHA-2 family
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~~~~~~~~~~~~
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.. autoclass:: Sha256
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.. autoclass:: Sha384
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.. autoclass:: Sha512
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Example
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-------
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.. doctest::
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>>> from wolfcrypt.hashes import Sha256
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>>>
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>>> s = Sha256()
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>>> s.update(b'wolf')
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>>> s.update(b'crypt')
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>>> s.digest()
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b'\x96\xe0.{\x1c\xbc\xd6\xf1\x04\xfe\x1f\xdbFR\x02zU\x05\xb6\x86R\xb7\x00\x95\xc61\x8f\x9d\xce\r\x18D'
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>>> s.hexdigest()
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b'96e02e7b1cbcd6f104fe1fdb4652027a5505b68652b70095c6318f9dce0d1844'
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>>>
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>>> s.update(b'rocks')
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>>> s.hexdigest()
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b'e1a50df419d65715c48316bdc6a6f7f0485f4b26c1b107228faf17988b61c83f'
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>>>
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>>> Sha256(b'wolfcryptrocks').hexdigest()
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b'e1a50df419d65715c48316bdc6a6f7f0485f4b26c1b107228faf17988b61c83f'
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>>>
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>>> Sha256.new(b'wolfcryptrocks').hexdigest()
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b'e1a50df419d65715c48316bdc6a6f7f0485f4b26c1b107228faf17988b61c83f'
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