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Allow an empty nonce to mean "continue using the current cipher state".
GH #864
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Renames a couple of functions for somewhat better name consistency,
eg make_u32bit becomes make_uint32. The old typedefs remain for now
since probably lots of application code uses them.
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See PR #552
- Add Cipher_Mode::reset() which resets just the message specific state and allows encrypting again under the existing key
- In Cipher_Mode::clear() (at some planes) use cipher->clear() instead of resetting the pointer which would make the cipher object unusable
- EAX_Decryption::output_length() bugfix?! Now its possible to decrypt an empty ciphertext (just a tag)
- Bugfix for GCM_Decryption::finish()
- set tag length in GCM_Mode::name()
- Cipher_Mode tests: add tests for reset()and process()
- AEAD_Mode tests: add tests for reset(), clear(), update() and process()
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The Cipher_Mode::update API is more general than needed to just
support ciphers (this is due to it previously being an API of
Transform which before 8b85b780515 was Cipher_Mode's base class)
Define a less general interface `process` which either processes the
blocks in-place, producing exactly as much output as there was input,
or (SIV/CCM case) saves the entire message for processing in `finish`.
These two uses cover all current or anticipated cipher modes.
Leaves `update` for compatability with existing callers; all that is
needed is an inline function forwarding to `process`.
Removes the return type from `start` - in all cipher implementations,
this always returned an empty vector.
Adds BOTAN_ARG_CHECK macro; right now BOTAN_ASSERT is being used
for argument checking in some places, which is not right at all.
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explicit.
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