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2825 lines (2752 loc) · 47.6 KB
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package com.thealgorithms.ciphers;
import java.math.BigInteger;
import java.util.Scanner;
/**
* This class is build to demonstrate the application of the AES-algorithm on a
* single 128-Bit block of data.
*/
public class AES {
/**
* Precalculated values for x to the power of 2 in Rijndaels galois field.
* Used as 'RCON' during the key expansion.
*/
private static final int[] RCON = {
0x8d,
0x01,
0x02,
0x04,
0x08,
0x10,
0x20,
0x40,
0x80,
0x1b,
0x36,
0x6c,
0xd8,
0xab,
0x4d,
0x9a,
0x2f,
0x5e,
0xbc,
0x63,
0xc6,
0x97,
0x35,
0x6a,
0xd4,
0xb3,
0x7d,
0xfa,
0xef,
0xc5,
0x91,
0x39,
0x72,
0xe4,
0xd3,
0xbd,
0x61,
0xc2,
0x9f,
0x25,
0x4a,
0x94,
0x33,
0x66,
0xcc,
0x83,
0x1d,
0x3a,
0x74,
0xe8,
0xcb,
0x8d,
0x01,
0x02,
0x04,
0x08,
0x10,
0x20,
0x40,
0x80,
0x1b,
0x36,
0x6c,
0xd8,
0xab,
0x4d,
0x9a,
0x2f,
0x5e,
0xbc,
0x63,
0xc6,
0x97,
0x35,
0x6a,
0xd4,
0xb3,
0x7d,
0xfa,
0xef,
0xc5,
0x91,
0x39,
0x72,
0xe4,
0xd3,
0xbd,
0x61,
0xc2,
0x9f,
0x25,
0x4a,
0x94,
0x33,
0x66,
0xcc,
0x83,
0x1d,
0x3a,
0x74,
0xe8,
0xcb,
0x8d,
0x01,
0x02,
0x04,
0x08,
0x10,
0x20,
0x40,
0x80,
0x1b,
0x36,
0x6c,
0xd8,
0xab,
0x4d,
0x9a,
0x2f,
0x5e,
0xbc,
0x63,
0xc6,
0x97,
0x35,
0x6a,
0xd4,
0xb3,
0x7d,
0xfa,
0xef,
0xc5,
0x91,
0x39,
0x72,
0xe4,
0xd3,
0xbd,
0x61,
0xc2,
0x9f,
0x25,
0x4a,
0x94,
0x33,
0x66,
0xcc,
0x83,
0x1d,
0x3a,
0x74,
0xe8,
0xcb,
0x8d,
0x01,
0x02,
0x04,
0x08,
0x10,
0x20,
0x40,
0x80,
0x1b,
0x36,
0x6c,
0xd8,
0xab,
0x4d,
0x9a,
0x2f,
0x5e,
0xbc,
0x63,
0xc6,
0x97,
0x35,
0x6a,
0xd4,
0xb3,
0x7d,
0xfa,
0xef,
0xc5,
0x91,
0x39,
0x72,
0xe4,
0xd3,
0xbd,
0x61,
0xc2,
0x9f,
0x25,
0x4a,
0x94,
0x33,
0x66,
0xcc,
0x83,
0x1d,
0x3a,
0x74,
0xe8,
0xcb,
0x8d,
0x01,
0x02,
0x04,
0x08,
0x10,
0x20,
0x40,
0x80,
0x1b,
0x36,
0x6c,
0xd8,
0xab,
0x4d,
0x9a,
0x2f,
0x5e,
0xbc,
0x63,
0xc6,
0x97,
0x35,
0x6a,
0xd4,
0xb3,
0x7d,
0xfa,
0xef,
0xc5,
0x91,
0x39,
0x72,
0xe4,
0xd3,
0xbd,
0x61,
0xc2,
0x9f,
0x25,
0x4a,
0x94,
0x33,
0x66,
0xcc,
0x83,
0x1d,
0x3a,
0x74,
0xe8,
0xcb,
0x8d,
};
/**
* Rijndael S-box Substitution table used for encryption in the subBytes
* step, as well as the key expansion.
*/
private static final int[] SBOX = {
0x63,
0x7C,
0x77,
0x7B,
0xF2,
0x6B,
0x6F,
0xC5,
0x30,
0x01,
0x67,
0x2B,
0xFE,
0xD7,
0xAB,
0x76,
0xCA,
0x82,
0xC9,
0x7D,
0xFA,
0x59,
0x47,
0xF0,
0xAD,
0xD4,
0xA2,
0xAF,
0x9C,
0xA4,
0x72,
0xC0,
0xB7,
0xFD,
0x93,
0x26,
0x36,
0x3F,
0xF7,
0xCC,
0x34,
0xA5,
0xE5,
0xF1,
0x71,
0xD8,
0x31,
0x15,
0x04,
0xC7,
0x23,
0xC3,
0x18,
0x96,
0x05,
0x9A,
0x07,
0x12,
0x80,
0xE2,
0xEB,
0x27,
0xB2,
0x75,
0x09,
0x83,
0x2C,
0x1A,
0x1B,
0x6E,
0x5A,
0xA0,
0x52,
0x3B,
0xD6,
0xB3,
0x29,
0xE3,
0x2F,
0x84,
0x53,
0xD1,
0x00,
0xED,
0x20,
0xFC,
0xB1,
0x5B,
0x6A,
0xCB,
0xBE,
0x39,
0x4A,
0x4C,
0x58,
0xCF,
0xD0,
0xEF,
0xAA,
0xFB,
0x43,
0x4D,
0x33,
0x85,
0x45,
0xF9,
0x02,
0x7F,
0x50,
0x3C,
0x9F,
0xA8,
0x51,
0xA3,
0x40,
0x8F,
0x92,
0x9D,
0x38,
0xF5,
0xBC,
0xB6,
0xDA,
0x21,
0x10,
0xFF,
0xF3,
0xD2,
0xCD,
0x0C,
0x13,
0xEC,
0x5F,
0x97,
0x44,
0x17,
0xC4,
0xA7,
0x7E,
0x3D,
0x64,
0x5D,
0x19,
0x73,
0x60,
0x81,
0x4F,
0xDC,
0x22,
0x2A,
0x90,
0x88,
0x46,
0xEE,
0xB8,
0x14,
0xDE,
0x5E,
0x0B,
0xDB,
0xE0,
0x32,
0x3A,
0x0A,
0x49,
0x06,
0x24,
0x5C,
0xC2,
0xD3,
0xAC,
0x62,
0x91,
0x95,
0xE4,
0x79,
0xE7,
0xC8,
0x37,
0x6D,
0x8D,
0xD5,
0x4E,
0xA9,
0x6C,
0x56,
0xF4,
0xEA,
0x65,
0x7A,
0xAE,
0x08,
0xBA,
0x78,
0x25,
0x2E,
0x1C,
0xA6,
0xB4,
0xC6,
0xE8,
0xDD,
0x74,
0x1F,
0x4B,
0xBD,
0x8B,
0x8A,
0x70,
0x3E,
0xB5,
0x66,
0x48,
0x03,
0xF6,
0x0E,
0x61,
0x35,
0x57,
0xB9,
0x86,
0xC1,
0x1D,
0x9E,
0xE1,
0xF8,
0x98,
0x11,
0x69,
0xD9,
0x8E,
0x94,
0x9B,
0x1E,
0x87,
0xE9,
0xCE,
0x55,
0x28,
0xDF,
0x8C,
0xA1,
0x89,
0x0D,
0xBF,
0xE6,
0x42,
0x68,
0x41,
0x99,
0x2D,
0x0F,
0xB0,
0x54,
0xBB,
0x16,
};
/**
* Inverse Rijndael S-box Substitution table used for decryption in the
* subBytesDec step.
*/
private static final int[] INVERSE_SBOX = {
0x52,
0x09,
0x6A,
0xD5,
0x30,
0x36,
0xA5,
0x38,
0xBF,
0x40,
0xA3,
0x9E,
0x81,
0xF3,
0xD7,
0xFB,
0x7C,
0xE3,
0x39,
0x82,
0x9B,
0x2F,
0xFF,
0x87,
0x34,
0x8E,
0x43,
0x44,
0xC4,
0xDE,
0xE9,
0xCB,
0x54,
0x7B,
0x94,
0x32,
0xA6,
0xC2,
0x23,
0x3D,
0xEE,
0x4C,
0x95,
0x0B,
0x42,
0xFA,
0xC3,
0x4E,
0x08,
0x2E,
0xA1,
0x66,
0x28,
0xD9,
0x24,
0xB2,
0x76,
0x5B,
0xA2,
0x49,
0x6D,
0x8B,
0xD1,
0x25,
0x72,
0xF8,
0xF6,
0x64,
0x86,
0x68,
0x98,
0x16,
0xD4,
0xA4,
0x5C,
0xCC,
0x5D,
0x65,
0xB6,
0x92,
0x6C,
0x70,
0x48,
0x50,
0xFD,
0xED,
0xB9,
0xDA,
0x5E,
0x15,
0x46,
0x57,
0xA7,
0x8D,
0x9D,
0x84,
0x90,
0xD8,
0xAB,
0x00,
0x8C,
0xBC,
0xD3,
0x0A,
0xF7,
0xE4,
0x58,
0x05,
0xB8,
0xB3,
0x45,
0x06,
0xD0,
0x2C,
0x1E,
0x8F,
0xCA,
0x3F,
0x0F,
0x02,
0xC1,
0xAF,
0xBD,
0x03,
0x01,
0x13,
0x8A,
0x6B,
0x3A,
0x91,
0x11,
0x41,
0x4F,
0x67,
0xDC,
0xEA,
0x97,
0xF2,
0xCF,
0xCE,
0xF0,
0xB4,
0xE6,
0x73,
0x96,
0xAC,
0x74,
0x22,
0xE7,
0xAD,
0x35,
0x85,
0xE2,
0xF9,
0x37,
0xE8,
0x1C,
0x75,
0xDF,
0x6E,
0x47,
0xF1,
0x1A,
0x71,
0x1D,
0x29,
0xC5,
0x89,
0x6F,
0xB7,
0x62,
0x0E,
0xAA,
0x18,
0xBE,
0x1B,
0xFC,
0x56,
0x3E,
0x4B,
0xC6,
0xD2,
0x79,
0x20,
0x9A,
0xDB,
0xC0,
0xFE,
0x78,
0xCD,
0x5A,
0xF4,
0x1F,
0xDD,
0xA8,
0x33,
0x88,
0x07,
0xC7,
0x31,
0xB1,
0x12,
0x10,
0x59,
0x27,
0x80,
0xEC,
0x5F,
0x60,
0x51,
0x7F,
0xA9,
0x19,
0xB5,
0x4A,
0x0D,
0x2D,
0xE5,
0x7A,
0x9F,
0x93,
0xC9,
0x9C,
0xEF,
0xA0,
0xE0,
0x3B,
0x4D,
0xAE,
0x2A,
0xF5,
0xB0,
0xC8,
0xEB,
0xBB,
0x3C,
0x83,
0x53,
0x99,
0x61,
0x17,
0x2B,
0x04,
0x7E,
0xBA,
0x77,
0xD6,
0x26,
0xE1,
0x69,
0x14,
0x63,
0x55,
0x21,
0x0C,
0x7D,
};
/**
* Precalculated lookup table for galois field multiplication by 2 used in
* the MixColums step during encryption.
*/
private static final int[] MULT2 = {
0x00,
0x02,
0x04,
0x06,
0x08,
0x0a,
0x0c,
0x0e,
0x10,
0x12,
0x14,
0x16,
0x18,
0x1a,
0x1c,
0x1e,
0x20,
0x22,
0x24,
0x26,
0x28,
0x2a,
0x2c,
0x2e,
0x30,
0x32,
0x34,
0x36,
0x38,
0x3a,
0x3c,
0x3e,
0x40,
0x42,
0x44,
0x46,
0x48,
0x4a,
0x4c,
0x4e,
0x50,
0x52,
0x54,
0x56,
0x58,
0x5a,
0x5c,
0x5e,
0x60,
0x62,
0x64,
0x66,
0x68,
0x6a,
0x6c,
0x6e,
0x70,
0x72,
0x74,
0x76,
0x78,
0x7a,
0x7c,
0x7e,
0x80,
0x82,
0x84,
0x86,
0x88,
0x8a,
0x8c,
0x8e,
0x90,
0x92,
0x94,
0x96,
0x98,
0x9a,
0x9c,
0x9e,
0xa0,
0xa2,
0xa4,
0xa6,
0xa8,
0xaa,
0xac,
0xae,
0xb0,
0xb2,
0xb4,
0xb6,
0xb8,
0xba,
0xbc,
0xbe,
0xc0,
0xc2,
0xc4,
0xc6,
0xc8,
0xca,
0xcc,
0xce,
0xd0,
0xd2,
0xd4,
0xd6,
0xd8,
0xda,
0xdc,
0xde,
0xe0,
0xe2,
0xe4,
0xe6,
0xe8,
0xea,
0xec,
0xee,
0xf0,
0xf2,
0xf4,
0xf6,
0xf8,
0xfa,
0xfc,
0xfe,
0x1b,
0x19,
0x1f,
0x1d,
0x13,
0x11,
0x17,
0x15,
0x0b,
0x09,
0x0f,
0x0d,
0x03,
0x01,
0x07,
0x05,
0x3b,
0x39,
0x3f,
0x3d,
0x33,
0x31,
0x37,
0x35,
0x2b,
0x29,
0x2f,
0x2d,
0x23,
0x21,
0x27,
0x25,
0x5b,
0x59,
0x5f,
0x5d,
0x53,
0x51,
0x57,
0x55,
0x4b,
0x49,
0x4f,
0x4d,
0x43,
0x41,
0x47,
0x45,
0x7b,
0x79,
0x7f,
0x7d,
0x73,
0x71,
0x77,
0x75,
0x6b,
0x69,
0x6f,
0x6d,
0x63,
0x61,
0x67,
0x65,
0x9b,
0x99,
0x9f,