Module keccak
Keccak family of cryptographic hash algorithms.
Keccak is the winning algorithm of the SHA-3 competition organized by NIST.
What eventually became SHA-3 is a variant incompatible to Keccak,
even though the security principles and margins remain the same.
If you are interested in writing SHA-3 compliant code, you must use
the modules SHA3_224, SHA3_256, SHA3_384 or SHA3_512.
This module implements the Keccak hash functions for the 64 bit word
length (b=1600) and the fixed digest sizes of 224, 256, 384 and 512 bits.
>>> from Cryptodome.Hash import keccak
>>>
>>> keccak_hash = keccak.new(digest_bits=512)
>>> keccak_hash.update(b'Some data')
>>> print keccak_hash.hexdigest()
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new(**kwargs)
Return a fresh instance of the hash object. |
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__package__ = ' Cryptodome.Hash '
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Return a fresh instance of the hash object.
- Parameters:
data (byte string) - Optional. The very first chunk of the message to hash.
It is equivalent to an early call to update().
digest_bytes (integer) - The size of the digest, in bytes (28, 32, 48, 64).
digest_bits (integer) - The size of the digest, in bits (224, 256, 384, 512).
update_after_digest (boolean) - Optional. By default, a hash object cannot be updated anymore after
the digest is computed. When this flag is True, such check
is no longer enforced.
- Returns:
- A Keccak_Hash object
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