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Framework adapted from Dinu Gherman's MD5 implementation by
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of blocksize.
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Update the md5 object with the string arg. Repeated calls
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to m.update(a+b).
The hash is immediately calculated for all full blocks. The final
calculation is made in digest(). It will calculate 1-2 blocks,
depending on how much padding we have to add. This allows us to
keep an intermediate value for the hash, so that we only need to
make minimal recalculation if we call update() to add more data
to the hashed string.
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Return the digest of the strings passed to the update()
method so far. This is a 16-byte string which may contain
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Like digest() except the digest is returned as a string of
length 32, containing only hexadecimal digits. This may be
used to exchange the value safely in email or other non-
binary environments.
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Return a copy ('clone') of the md5 object. This can be used
to efficiently compute the digests of strings that share
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If arg is present, the method call update(arg) is made.
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