Cipher4j

Introduction

Pure Implementations for encryption algorithms including DES, RSA, AES

Usage

Take AES Implementation for example

String plaintext = "passwordTextCase", key = "simpleKeyCase123";
CipherService aesService = new AESCipherService();

String encryptedText = aesService.encrypt(plaintext, key);
aesService.decrypt(encryptedText, key);

Output

DES

For tracing the whole process of DES encryption and decryption, encryption output:

#####################  encryption  #####################
plaintext                     01234567                      
keyText                       12345678                      

plaintext bits                00110000 00110001 00110010 00110011 00110100 00110101 00110110 00110111 
key bits                      00110001 00110010 00110011 00110100 00110101 00110110 00110111 00111000 
Permuted Choice 1 C0          00000000 00000000 11111111 1111 
Permuted Choice 1 D0          01100110 01111000 10000000 1111 

Start to generate sub keys......
[1] leftShifting C            00000000 00000001 11111111 1110 
[1] leftShifting D            11001100 11110001 00000001 1110 
[1] concatChars               00000000 00000001 11111111 11101100 11001111 00010000 00011110 
[1] subKey                    01010000 00101100 10101100 01010111 00101010 11000010 

[2] leftShifting C            00000000 00000011 11111111 1100 
[2] leftShifting D            10011001 11100010 00000011 1101 
[2] concatChars               00000000 00000011 11111111 11001001 10011110 00100000 00111101 
[2] subKey                    01010000 10101100 10100100 01010000 10100011 01000111 

[3] leftShifting C            00000000 00001111 11111111 0000 
[3] leftShifting D            01100111 10001000 00001111 0110 
[3] concatChars               00000000 00001111 11111111 00000110 01111000 10000000 11110110 
[3] subKey                    11010000 10101100 00100110 11110110 10000100 10001100 

[4] leftShifting C            00000000 00111111 11111100 0000 
[4] leftShifting D            10011110 00100000 00111101 1001 
[4] concatChars               00000000 00111111 11111100 00001001 11100010 00000011 11011001 
[4] subKey                    11100000 10100110 00100110 01001000 00110111 11001011 

[5] leftShifting C            00000000 11111111 11110000 0000 
[5] leftShifting D            01111000 10000000 11110110 0110 
[5] concatChars               00000000 11111111 11110000 00000111 10001000 00001111 01100110 
[5] subKey                    11100000 10010110 00100110 00111110 11110000 00101001 

[6] leftShifting C            00000011 11111111 11000000 0000 
[6] leftShifting D            11100010 00000011 11011001 1001 
[6] concatChars               00000011 11111111 11000000 00001110 00100000 00111101 10011001 
[6] subKey                    11100000 10010010 01110010 01100010 01011101 01100010 

[7] leftShifting C            00001111 11111111 00000000 0000 
[7] leftShifting D            10001000 00001111 01100110 0111 
[7] concatChars               00001111 11111111 00000000 00001000 10000000 11110110 01100111 
[7] subKey                    10100100 11010010 01110010 10001100 10101001 00111010 

[8] leftShifting C            00111111 11111100 00000000 0000 
[8] leftShifting D            00100000 00111101 10011001 1110 
[8] concatChars               00111111 11111100 00000000 00000010 00000011 11011001 10011110 
[8] subKey                    10100110 01010011 01010010 11100101 01011110 01010000 

[9] leftShifting C            01111111 11111000 00000000 0000 
[9] leftShifting D            01000000 01111011 00110011 1100 
[9] concatChars               01111111 11111000 00000000 00000100 00000111 10110011 00111100 
[9] subKey                    00100110 01010011 01010011 11001011 10011010 01000000 

[10] leftShifting C           11111111 11100000 00000000 0001 
[10] leftShifting D           00000001 11101100 11001111 0001 
[10] concatChars              11111111 11100000 00000000 00010000 00011110 11001100 11110001 
[10] subKey                   00101111 01010001 01010001 11010000 11000111 00111100 

[11] leftShifting C           11111111 10000000 00000000 0111 
[11] leftShifting D           00000111 10110011 00111100 0100 
[11] concatChars              11111111 10000000 00000000 01110000 01111011 00110011 11000100 
[11] subKey                   00001111 01000001 11011001 00011001 00011110 10001100 

[12] leftShifting C           11111110 00000000 00000001 1111 
[12] leftShifting D           00011110 11001100 11110001 0000 
[12] concatChars              11111110 00000000 00000001 11110001 11101100 11001111 00010000 
[12] subKey                   00011111 01000001 10011001 11011000 01110000 10110001 

[13] leftShifting C           11111000 00000000 00000111 1111 
[13] leftShifting D           01111011 00110011 11000100 0000 
[13] concatChars              11111000 00000000 00000111 11110111 10110011 00111100 01000000 
[13] subKey                   00011111 00001001 10001001 00100011 01101010 00101101 

[14] leftShifting C           11100000 00000000 00011111 1111 
[14] leftShifting D           11101100 11001111 00010000 0001 
[14] concatChars              11100000 00000000 00011111 11111110 11001100 11110001 00000001 
[14] subKey                   00011011 00101000 10001101 10110010 00111001 10010010 

[15] leftShifting C           10000000 00000000 01111111 1111 
[15] leftShifting D           10110011 00111100 01000000 0111 
[15] concatChars              10000000 00000000 01111111 11111011 00110011 11000100 00000111 
[15] subKey                   00011001 00101100 10001100 10100101 00000011 00110111 

[16] leftShifting C           00000000 00000000 11111111 1111 
[16] leftShifting D           01100110 01111000 10000000 1111 
[16] concatChars              00000000 00000000 11111111 11110110 01100111 10001000 00001111 
[16] subKey                   01010001 00101100 10001100 10100111 01000011 11000000 

plaintext after ip            00000000 11111111 11110000 10101010 00000000 11111111 00000000 11001100 
L0                            00000000 11111111 11110000 10101010 
R0                            00000000 11111111 00000000 11001100 

[f] 32-bit input              00000000 11111111 00000000 11001100 
[f] Selection                 00000000 00010111 11111110 10000000 00010110 01011000 
[f] subKey                    01010000 00101100 10101100 01010111 00101010 11000010 
[f] xor                       01010000 00111011 01010010 11010111 00111100 10011010 
[F] SBox                      01101101 10000010 00001110 11110000 
[f] P Replacement             00010010 01111000 11000111 00011001 
[1] left                      00000000 11111111 00000000 11001100 
[1] right                     00010010 10000111 00110111 10110011 

[f] 32-bit input              00010010 10000111 00110111 10110011 
[f] Selection                 10001010 01010100 00001110 10011010 11111101 10100110 
[f] subKey                    01010000 10101100 10100100 01010000 10100011 01000111 
[f] xor                       11011010 11111000 10101010 11001010 01011110 11100001 
[F] SBox                      01110010 01101011 10010010 00100010 
[f] P Replacement             11100001 01100011 10000110 01000110 
[2] left                      00010010 10000111 00110111 10110011 
[2] right                     11100001 10011100 10000110 10001010 

[f] 32-bit input              11100001 10011100 10000110 10001010 
[f] Selection                 01110000 00111100 11111001 01000000 11010100 01010101 
[f] subKey                    11010000 10101100 00100110 11110110 10000100 10001100 
[f] xor                       10100000 10010000 11011111 10110110 01010000 11011001 
[F] SBox                      11011111 01111001 00100010 00000000 
[f] P Replacement             11000100 10101001 11000000 11010110 
[3] left                      11100001 10011100 10000110 10001010 
[3] right                     11010110 00101110 11110111 01100101 

[f] 32-bit input              11010110 00101110 11110111 01100101 
[f] Selection                 11101010 11000001 01011101 01111010 11101011 00001011 
[f] subKey                    11100000 10100110 00100110 01001000 00110111 11001011 
[f] xor                       00001010 01100111 01111011 00110010 11011100 11000000 
[F] SBox                      01001011 11110111 10111111 01011101 
[f] P Replacement             11111111 01111001 11111001 10101100 
[4] left                      11010110 00101110 11110111 01100101 
[4] right                     00011110 11100101 01111111 00100110 

[f] 32-bit input              00011110 11100101 01111111 00100110 
[f] Selection                 00001111 11010111 00001010 10111111 11101001 00001100 
[f] subKey                    11100000 10010110 00100110 00111110 11110000 00101001 
[f] xor                       11101111 01000001 00101100 10000001 00011001 00100101 
[F] SBox                      00001100 10010111 01000110 10111110 
[f] P Replacement             10001110 01101110 00010101 00111001 
[5] left                      00011110 11100101 01111111 00100110 
[5] right                     01011000 01000000 11100010 01011100 

[f] 32-bit input              01011000 01000000 11100010 01011100 
[f] Selection                 00101111 00000010 00000001 01110000 01000010 11111000 
[f] subKey                    11100000 10010010 01110010 01100010 01011101 01100010 
[f] xor                       11001111 10010000 01110011 00010010 00011111 10011010 
[F] SBox                      10110000 11010100 01000100 00100000 
[f] P Replacement             00000100 10000101 00010111 00001010 
[6] left                      01011000 01000000 11100010 01011100 
[6] right                     00011010 01100000 01101000 00101100 

[f] 32-bit input              00011010 01100000 01101000 00101100 
[f] Selection                 00001111 01000011 00000000 00110101 00000001 01011000 
[f] subKey                    10100100 11010010 01110010 10001100 10101001 00111010 
[f] xor                       10101011 10010001 01110010 101