Add optional CTR_SEEK mode functions #218
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- Extends upon the CTR mode by allowing for the user to provide an index of a block they want to encrypt/decrypt. - Add function AES_CTR_xcrypt_block_at_position(). - Add function AES_CTR_xcrypt_block_at_position_extended(). - Should produce exactly the same output as CTR mode when used sequentially.
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I've been using
AES_CTR_xcrypt_bufferto encrypt a stream and needed to decrypt blocks out of order so I added aAES_CTR_xcrypt_block_at_positionfunction so a block offset into the stream can be provided. I understand that this might be out of the scope of the library but I thought I'd request to merge it because I found the function helpful.Changes made: