Hello,

I am trying to implement AES in CTR mode but with the custom IV
increment. CryptoPP implementation increments IV over the whole vector
but I would like to have increment only over the lowest 4 bytes (with
modulo).

E.g. 00 .... AB FF FF FF FE -> 00 .... AB FF FF FF FF -> 00 .... AB 00
00 00 00

Is there any easy way how to do it? Only solution which I currently
found is to increment IV by myself after each block and then call
Resynchronize and then encrypt another block.

Thank you for your help,
Jan

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