multiple xts_encrypt() cannot be performed because the tweak is not updated. That means that xts_encrypt(buffer1, tweak) xts_encrypt(buffer2, tweak) is not the same as xts_encrypt(concat(buffer1, buffer2), tweak) Current patch enables such functionalities by updating the tweak as output of the encryption. Note that the tweak is no more constant. The very same modification is performed on xts_decrypt() Signed-off-by: Pascal Brand <pascal.brand@st.com>
libtomcrypt
See doc/crypt.pdf for a detailed documentation
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