aes256XtsDecrypt - 2023.2 English

#include "xf_security/xts.hpp"

static void aes256XtsDecrypt (
    hls::stream <ap_uint <128>>& ciphertextStrm,
    hls::stream <bool>& endCiphertextStrm,
    hls::stream <ap_uint <64>>& lenStrm,
    hls::stream <ap_uint <256>>& cipherkeyStrm,
    hls::stream <ap_uint <128>>& IVStrm,
    hls::stream <ap_uint <128>>& plaintextStrm,
    hls::stream <bool>& endPlaintextStrm
    )

aes256XtsDecrypt is XTS decryption mode with AES-256 single block cipher.

The algorithm reference is : “IEEE Standard for Cryptographic Protection of Data on Block-Oriented Storage Devices” The implementation is optimized for better performance in FPGA.

Parameters:

ciphertextStrm	Input block stream text to be decrypted, each block is 128 bits.
endCiphertextStrm	End flag of block stream ciphertext, 1 bit.
lenStrm	Total length of plaintext in bit, 64 bits.
cipherkeyStrm	Input two cipher key used in decryption, 256 bits.
IVStrm	Initialization vector for the fisrt iteration of AES encrypition, 128 bits.
plaintextStrm	Output decrypted block stream text, each block is 128 bits.
endPlaintextStrm	End flag of block stream plaintext, 1 bit.

#include "aes.hpp"

template <>
class aesEnc <128>: public xf::security::aesTable

// fields

ap_uint <128> key_list[11]