Added AES Algorithm

Added AES in the cipher directory.
Current features:
- Full encryption
- Full decryption

Remaining Issues:
- Implement commandline I/O for key, text and mode selection
- Fix bugs in key schedule (generated key set is not the correct)
- Write unittests
This commit is contained in:
Phil-Schmidt 2017-11-19 14:28:06 +01:00
parent 315e74d4c1
commit b74a22ddd7

517
ciphers/AES.java Normal file
View File

@ -0,0 +1,517 @@
package ciphers;
import java.math.BigInteger;
/* This class is build to demonstrate the
* apllication 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' in during the key expansion.
*/
private static 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 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 int[] inverseSBox = { 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 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, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85, 0xbb, 0xb9, 0xbf, 0xbd,
0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5, 0xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1,
0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5, 0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5,
0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5 };
/*
* Precalculated lookup table for galois field multiplication by 3 used in
* the MixColums step during encryption.
*/
private static int[] mult3 = { 0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17,
0x12, 0x11, 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21,
0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71, 0x50, 0x53,
0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41, 0xc0, 0xc3, 0xc6, 0xc5,
0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1, 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff,
0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1, 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9,
0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1, 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b,
0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81, 0x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86,
0x8f, 0x8c, 0x89, 0x8a, 0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc,
0xb9, 0xba, 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea,
0xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda, 0x5b, 0x58,
0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a, 0x6b, 0x68, 0x6d, 0x6e,
0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a, 0x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34,
0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a, 0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02,
0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a };
/*
* Precalculated lookup table for galois field multiplication by 9 used in
* the MixColums step during decryption.
*/
private static int[] mult9 = { 0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65,
0x7e, 0x77, 0x90, 0x99, 0x82, 0x8b, 0xb4, 0xbd, 0xa6, 0xaf, 0xd8, 0xd1, 0xca, 0xc3, 0xfc, 0xf5, 0xee, 0xe7,
0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04, 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c, 0xab, 0xa2,
0xb9, 0xb0, 0x8f, 0x86, 0x9d, 0x94, 0xe3, 0xea, 0xf1, 0xf8, 0xc7, 0xce, 0xd5, 0xdc, 0x76, 0x7f, 0x64, 0x6d,
0x52, 0x5b, 0x40, 0x49, 0x3e, 0x37, 0x2c, 0x25, 0x1a, 0x13, 0x08, 0x01, 0xe6, 0xef, 0xf4, 0xfd, 0xc2, 0xcb,
0xd0, 0xd9, 0xae, 0xa7, 0xbc, 0xb5, 0x8a, 0x83, 0x98, 0x91, 0x4d, 0x44, 0x5f, 0x56, 0x69, 0x60, 0x7b, 0x72,
0x05, 0x0c, 0x17, 0x1e, 0x21, 0x28, 0x33, 0x3a, 0xdd, 0xd4, 0xcf, 0xc6, 0xf9, 0xf0, 0xeb, 0xe2, 0x95, 0x9c,
0x87, 0x8e, 0xb1, 0xb8, 0xa3, 0xaa, 0xec, 0xe5, 0xfe, 0xf7, 0xc8, 0xc1, 0xda, 0xd3, 0xa4, 0xad, 0xb6, 0xbf,
0x80, 0x89, 0x92, 0x9b, 0x7c, 0x75, 0x6e, 0x67, 0x58, 0x51, 0x4a, 0x43, 0x34, 0x3d, 0x26, 0x2f, 0x10, 0x19,
0x02, 0x0b, 0xd7, 0xde, 0xc5, 0xcc, 0xf3, 0xfa, 0xe1, 0xe8, 0x9f, 0x96, 0x8d, 0x84, 0xbb, 0xb2, 0xa9, 0xa0,
0x47, 0x4e, 0x55, 0x5c, 0x63, 0x6a, 0x71, 0x78, 0x0f, 0x06, 0x1d, 0x14, 0x2b, 0x22, 0x39, 0x30, 0x9a, 0x93,
0x88, 0x81, 0xbe, 0xb7, 0xac, 0xa5, 0xd2, 0xdb, 0xc0, 0xc9, 0xf6, 0xff, 0xe4, 0xed, 0x0a, 0x03, 0x18, 0x11,
0x2e, 0x27, 0x3c, 0x35, 0x42, 0x4b, 0x50, 0x59, 0x66, 0x6f, 0x74, 0x7d, 0xa1, 0xa8, 0xb3, 0xba, 0x85, 0x8c,
0x97, 0x9e, 0xe9, 0xe0, 0xfb, 0xf2, 0xcd, 0xc4, 0xdf, 0xd6, 0x31, 0x38, 0x23, 0x2a, 0x15, 0x1c, 0x07, 0x0e,
0x79, 0x70, 0x6b, 0x62, 0x5d, 0x54, 0x4f, 0x46 };
/*
* Precalculated lookup table for galois field multiplication by 11 used in
* the MixColums step during decryption.
*/
private static int[] mult11 = { 0x00, 0x0b, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31, 0x58, 0x53, 0x4e, 0x45, 0x74, 0x7f,
0x62, 0x69, 0xb0, 0xbb, 0xa6, 0xad, 0x9c, 0x97, 0x8a, 0x81, 0xe8, 0xe3, 0xfe, 0xf5, 0xc4, 0xcf, 0xd2, 0xd9,
0x7b, 0x70, 0x6d, 0x66, 0x57, 0x5c, 0x41, 0x4a, 0x23, 0x28, 0x35, 0x3e, 0x0f, 0x04, 0x19, 0x12, 0xcb, 0xc0,
0xdd, 0xd6, 0xe7, 0xec, 0xf1, 0xfa, 0x93, 0x98, 0x85, 0x8e, 0xbf, 0xb4, 0xa9, 0xa2, 0xf6, 0xfd, 0xe0, 0xeb,
0xda, 0xd1, 0xcc, 0xc7, 0xae, 0xa5, 0xb8, 0xb3, 0x82, 0x89, 0x94, 0x9f, 0x46, 0x4d, 0x50, 0x5b, 0x6a, 0x61,
0x7c, 0x77, 0x1e, 0x15, 0x08, 0x03, 0x32, 0x39, 0x24, 0x2f, 0x8d, 0x86, 0x9b, 0x90, 0xa1, 0xaa, 0xb7, 0xbc,
0xd5, 0xde, 0xc3, 0xc8, 0xf9, 0xf2, 0xef, 0xe4, 0x3d, 0x36, 0x2b, 0x20, 0x11, 0x1a, 0x07, 0x0c, 0x65, 0x6e,
0x73, 0x78, 0x49, 0x42, 0x5f, 0x54, 0xf7, 0xfc, 0xe1, 0xea, 0xdb, 0xd0, 0xcd, 0xc6, 0xaf, 0xa4, 0xb9, 0xb2,
0x83, 0x88, 0x95, 0x9e, 0x47, 0x4c, 0x51, 0x5a, 0x6b, 0x60, 0x7d, 0x76, 0x1f, 0x14, 0x09, 0x02, 0x33, 0x38,
0x25, 0x2e, 0x8c, 0x87, 0x9a, 0x91, 0xa0, 0xab, 0xb6, 0xbd, 0xd4, 0xdf, 0xc2, 0xc9, 0xf8, 0xf3, 0xee, 0xe5,
0x3c, 0x37, 0x2a, 0x21, 0x10, 0x1b, 0x06, 0x0d, 0x64, 0x6f, 0x72, 0x79, 0x48, 0x43, 0x5e, 0x55, 0x01, 0x0a,
0x17, 0x1c, 0x2d, 0x26, 0x3b, 0x30, 0x59, 0x52, 0x4f, 0x44, 0x75, 0x7e, 0x63, 0x68, 0xb1, 0xba, 0xa7, 0xac,
0x9d, 0x96, 0x8b, 0x80, 0xe9, 0xe2, 0xff, 0xf4, 0xc5, 0xce, 0xd3, 0xd8, 0x7a, 0x71, 0x6c, 0x67, 0x56, 0x5d,
0x40, 0x4b, 0x22, 0x29, 0x34, 0x3f, 0x0e, 0x05, 0x18, 0x13, 0xca, 0xc1, 0xdc, 0xd7, 0xe6, 0xed, 0xf0, 0xfb,
0x92, 0x99, 0x84, 0x8f, 0xbe, 0xb5, 0xa8, 0xa3 };
/*
* Precalculated lookup table for galois field multiplication by 13 used in
* the MixColums step during decryption.
*/
private static int[] mult13 = { 0x00, 0x0d, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23, 0x68, 0x65, 0x72, 0x7f, 0x5c, 0x51,
0x46, 0x4b, 0xd0, 0xdd, 0xca, 0xc7, 0xe4, 0xe9, 0xfe, 0xf3, 0xb8, 0xb5, 0xa2, 0xaf, 0x8c, 0x81, 0x96, 0x9b,
0xbb, 0xb6, 0xa1, 0xac, 0x8f, 0x82, 0x95, 0x98, 0xd3, 0xde, 0xc9, 0xc4, 0xe7, 0xea, 0xfd, 0xf0, 0x6b, 0x66,
0x71, 0x7c, 0x5f, 0x52, 0x45, 0x48, 0x03, 0x0e, 0x19, 0x14, 0x37, 0x3a, 0x2d, 0x20, 0x6d, 0x60, 0x77, 0x7a,
0x59, 0x54, 0x43, 0x4e, 0x05, 0x08, 0x1f, 0x12, 0x31, 0x3c, 0x2b, 0x26, 0xbd, 0xb0, 0xa7, 0xaa, 0x89, 0x84,
0x93, 0x9e, 0xd5, 0xd8, 0xcf, 0xc2, 0xe1, 0xec, 0xfb, 0xf6, 0xd6, 0xdb, 0xcc, 0xc1, 0xe2, 0xef, 0xf8, 0xf5,
0xbe, 0xb3, 0xa4, 0xa9, 0x8a, 0x87, 0x90, 0x9d, 0x06, 0x0b, 0x1c, 0x11, 0x32, 0x3f, 0x28, 0x25, 0x6e, 0x63,
0x74, 0x79, 0x5a, 0x57, 0x40, 0x4d, 0xda, 0xd7, 0xc0, 0xcd, 0xee, 0xe3, 0xf4, 0xf9, 0xb2, 0xbf, 0xa8, 0xa5,
0x86, 0x8b, 0x9c, 0x91, 0x0a, 0x07, 0x10, 0x1d, 0x3e, 0x33, 0x24, 0x29, 0x62, 0x6f, 0x78, 0x75, 0x56, 0x5b,
0x4c, 0x41, 0x61, 0x6c, 0x7b, 0x76, 0x55, 0x58, 0x4f, 0x42, 0x09, 0x04, 0x13, 0x1e, 0x3d, 0x30, 0x27, 0x2a,
0xb1, 0xbc, 0xab, 0xa6, 0x85, 0x88, 0x9f, 0x92, 0xd9, 0xd4, 0xc3, 0xce, 0xed, 0xe0, 0xf7, 0xfa, 0xb7, 0xba,
0xad, 0xa0, 0x83, 0x8e, 0x99, 0x94, 0xdf, 0xd2, 0xc5, 0xc8, 0xeb, 0xe6, 0xf1, 0xfc, 0x67, 0x6a, 0x7d, 0x70,
0x53, 0x5e, 0x49, 0x44, 0x0f, 0x02, 0x15, 0x18, 0x3b, 0x36, 0x21, 0x2c, 0x0c, 0x01, 0x16, 0x1b, 0x38, 0x35,
0x22, 0x2f, 0x64, 0x69, 0x7e, 0x73, 0x50, 0x5d, 0x4a, 0x47, 0xdc, 0xd1, 0xc6, 0xcb, 0xe8, 0xe5, 0xf2, 0xff,
0xb4, 0xb9, 0xae, 0xa3, 0x80, 0x8d, 0x9a, 0x97 };
/*
* Precalculated lookup table for galois field multiplication by 14 used in
* the MixColums step during decryption.
*/
private static int[] mult14 = { 0x00, 0x0e, 0x1c, 0x12, 0x38, 0x36, 0x24, 0x2a, 0x70, 0x7e, 0x6c, 0x62, 0x48, 0x46,
0x54, 0x5a, 0xe0, 0xee, 0xfc, 0xf2, 0xd8, 0xd6, 0xc4, 0xca, 0x90, 0x9e, 0x8c, 0x82, 0xa8, 0xa6, 0xb4, 0xba,
0xdb, 0xd5, 0xc7, 0xc9, 0xe3, 0xed, 0xff, 0xf1, 0xab, 0xa5, 0xb7, 0xb9, 0x93, 0x9d, 0x8f, 0x81, 0x3b, 0x35,
0x27, 0x29, 0x03, 0x0d, 0x1f, 0x11, 0x4b, 0x45, 0x57, 0x59, 0x73, 0x7d, 0x6f, 0x61, 0xad, 0xa3, 0xb1, 0xbf,
0x95, 0x9b, 0x89, 0x87, 0xdd, 0xd3, 0xc1, 0xcf, 0xe5, 0xeb, 0xf9, 0xf7, 0x4d, 0x43, 0x51, 0x5f, 0x75, 0x7b,
0x69, 0x67, 0x3d, 0x33, 0x21, 0x2f, 0x05, 0x0b, 0x19, 0x17, 0x76, 0x78, 0x6a, 0x64, 0x4e, 0x40, 0x52, 0x5c,
0x06, 0x08, 0x1a, 0x14, 0x3e, 0x30, 0x22, 0x2c, 0x96, 0x98, 0x8a, 0x84, 0xae, 0xa0, 0xb2, 0xbc, 0xe6, 0xe8,
0xfa, 0xf4, 0xde, 0xd0, 0xc2, 0xcc, 0x41, 0x4f, 0x5d, 0x53, 0x79, 0x77, 0x65, 0x6b, 0x31, 0x3f, 0x2d, 0x23,
0x09, 0x07, 0x15, 0x1b, 0xa1, 0xaf, 0xbd, 0xb3, 0x99, 0x97, 0x85, 0x8b, 0xd1, 0xdf, 0xcd, 0xc3, 0xe9, 0xe7,
0xf5, 0xfb, 0x9a, 0x94, 0x86, 0x88, 0xa2, 0xac, 0xbe, 0xb0, 0xea, 0xe4, 0xf6, 0xf8, 0xd2, 0xdc, 0xce, 0xc0,
0x7a, 0x74, 0x66, 0x68, 0x42, 0x4c, 0x5e, 0x50, 0x0a, 0x04, 0x16, 0x18, 0x32, 0x3c, 0x2e, 0x20, 0xec, 0xe2,
0xf0, 0xfe, 0xd4, 0xda, 0xc8, 0xc6, 0x9c, 0x92, 0x80, 0x8e, 0xa4, 0xaa, 0xb8, 0xb6, 0x0c, 0x02, 0x10, 0x1e,
0x34, 0x3a, 0x28, 0x26, 0x7c, 0x72, 0x60, 0x6e, 0x44, 0x4a, 0x58, 0x56, 0x37, 0x39, 0x2b, 0x25, 0x0f, 0x01,
0x13, 0x1d, 0x47, 0x49, 0x5b, 0x55, 0x7f, 0x71, 0x63, 0x6d, 0xd7, 0xd9, 0xcb, 0xc5, 0xef, 0xe1, 0xf3, 0xfd,
0xa7, 0xa9, 0xbb, 0xb5, 0x9f, 0x91, 0x83, 0x8d };
/*
* Subroutine of the Rijndael key expansion.
*/
private static BigInteger scheduleCore(BigInteger t, int rconCounter){
String rBytes = t.toString(16);
// Add zero padding
while(rBytes.length() < 8){
rBytes = "0" + rBytes;
}
// rotate the first 16 bits to the back
String rotatingBytes = rBytes.substring(0, 2);
String fixedBytes = rBytes.substring(2);
rBytes = fixedBytes + rotatingBytes;
// apply S-Box to all 8-Bit Substrings
for(int i = 0;i < 4;i++){
String currentByteBits = rBytes.substring(i*2, (i+1)*2);
int currentByte = Integer.parseInt(currentByteBits, 16);
currentByte = sBox[currentByte];
// add the current rcon value to the first byte
if(i == 0){
currentByte = currentByte ^ rcon[rconCounter];
}
currentByteBits = Integer.toHexString(currentByte);
// Add zero padding
while(currentByteBits.length() < 2){
currentByteBits = "0" + currentByteBits;
}
// replace bytes in original string
rBytes = rBytes.substring(0,i*2)+currentByteBits+rBytes.substring((i+1)*2);
}
t = new BigInteger(rBytes,16);
return t;
}
/*
* Returns an array of 10 + 1 round keys that are calcualted by using
* Rijndael key schedule
*/
private static BigInteger[] keyExpansion(BigInteger initialKey) {
BigInteger[] roundKeys = { initialKey, new BigInteger("0"), new BigInteger("0"), new BigInteger("0"), new BigInteger("0"), new BigInteger("0"), new BigInteger("0"),
new BigInteger("0"), new BigInteger("0"), new BigInteger("0"), new BigInteger("0"), };
for(int i = 1 ; i < 11;i++){
// get the previous 32 bits the key
BigInteger t = roundKeys[i-1].remainder(new BigInteger("100000000",16));
// initialize rcon iteration
int rconCounter = 1;
// schedule core
t = scheduleCore(t,rconCounter);
rconCounter += 1;
BigInteger t1 = t.multiply(new BigInteger("100000000",16));
BigInteger t2 = t.multiply(new BigInteger("10000000000000000",16));
BigInteger t3 = t.multiply(new BigInteger("1000000000000000000000000",16));
t = t.add(t1).add(t2).add(t3);
BigInteger xorMask = roundKeys[i-1].divide(new BigInteger("100000000",16));
xorMask = xorMask.multiply(new BigInteger("100000000",16));
t = t.xor(xorMask);
roundKeys[i] = t;
}
return roundKeys;
}
/*
* Returns a representation of the input 128-bit block as an array of 8-bit
* integers.
*/
private static int[] splitBlockIntoCells(BigInteger block) {
int[] cells = new int[16];
String blockBits = block.toString(2);
// Append leading 0 for full "128-bit" string
while (blockBits.length() < 128) {
blockBits = "0" + blockBits;
}
for (int i = 0; i < 16; i++) {
String cellBits = blockBits.substring(8 * i, 8 * (i + 1));
cells[i] = Integer.parseInt(cellBits, 2);
}
return cells;
}
/*
* Returns the 128-bit BigInteger representation of the input of an array of
* 8-bit integers.
*/
private static BigInteger mergeCellsIntoBlock(int[] cells) {
String blockBits = "";
for (int i = 0; i < 16; i++) {
String cellBits = Integer.toBinaryString(cells[i]);
// Append leading 0 for full "8-bit" strings
while (cellBits.length() < 8) {
cellBits = "0" + cellBits;
}
blockBits += cellBits;
}
return new BigInteger(blockBits, 2);
}
/*
* Returns ciphertext XOR key
*/
private static BigInteger addRoundKey(BigInteger ciphertext, BigInteger key) {
return ciphertext.xor(key);
}
/*
* substitutes 8-Bit long substrings of the input using the S-Box and
* returns the result.
*/
private static BigInteger subBytes(BigInteger ciphertext) {
int[] cells = splitBlockIntoCells(ciphertext);
for (int i = 0; i < 16; i++) {
cells[i] = sBox[cells[i]];
}
return mergeCellsIntoBlock(cells);
}
/*
* substitutes 8-Bit long substrings of the input using
* the inverse S-Box for decryption and returns the result.
*/
private static BigInteger subBytesDec(BigInteger ciphertext) {
int[] cells = splitBlockIntoCells(ciphertext);
for (int i = 0; i < 16; i++) {
cells[i] = inverseSBox[cells[i]];
}
return mergeCellsIntoBlock(cells);
}
/*
* Cell permutation step. Shifts cells within the rows of the input and
* returns the result.
*/
private static BigInteger shiftRows(BigInteger ciphertext) {
int[] cells = splitBlockIntoCells(ciphertext);
int[] output = new int[16];
// do nothing in the first row
output[0] = cells[0];
output[1] = cells[1];
output[2] = cells[2];
output[3] = cells[3];
// shift the second row backwards by one cell
output[4] = cells[5];
output[5] = cells[6];
output[6] = cells[7];
output[7] = cells[4];
// shift the third row backwards by two cell
output[8] = cells[10];
output[9] = cells[11];
output[10] = cells[8];
output[11] = cells[9];
// shift the forth row backwards by tree cell
output[12] = cells[15];
output[13] = cells[12];
output[14] = cells[13];
output[15] = cells[14];
return mergeCellsIntoBlock(output);
}
/*
* Cell permutation step for decryption .
* Shifts cells within the rows of the input and returns the result.
*/
private static BigInteger shiftRowsDec(BigInteger ciphertext) {
int[] cells = splitBlockIntoCells(ciphertext);
int[] output = new int[16];
// do nothing in the first row
output[0] = cells[0];
output[1] = cells[1];
output[2] = cells[2];
output[3] = cells[3];
// shift the second row forwards by one cell
output[4] = cells[7];
output[5] = cells[4];
output[6] = cells[5];
output[7] = cells[6];
// shift the third row forwards by two cell
output[8] = cells[10];
output[9] = cells[11];
output[10] = cells[8];
output[11] = cells[9];
// shift the forth row forwards by tree cell
output[12] = cells[13];
output[13] = cells[14];
output[14] = cells[15];
output[15] = cells[12];
return mergeCellsIntoBlock(output);
}
/*
* Applies the Rijndael MixColumns to the
* input and returns the result.
*/
private static BigInteger mixColumns(BigInteger ciphertext) {
int[] cells = splitBlockIntoCells(ciphertext);
int[] outputCells = new int[16];
for (int i = 0; i < 4; i++) {
int[] row = { cells[i], cells[i + 4], cells[i + 8], cells[i + 12] };
outputCells[i] = mult2[row[0]] ^ mult3[row[1]] ^ row[2] ^ row[3];
outputCells[i + 4] = row[0] ^ mult2[row[1]] ^ mult3[row[2]] ^ row[3];
outputCells[i + 8] = row[0] ^ row[1] ^ mult2[row[2]] ^ mult3[row[3]];
outputCells[i + 12] = mult3[row[0]] ^ row[1] ^ row[2] ^ mult2[row[3]];
}
return mergeCellsIntoBlock(outputCells);
}
/*
* Applies the inverse Rijndael MixColumns
* for decryption to the input and returns the result.
*/
private static BigInteger mixColumnsDec(BigInteger ciphertext) {
int[] cells = splitBlockIntoCells(ciphertext);
int[] outputCells = new int[16];
for (int i = 0; i < 4; i++) {
int[] row = { cells[i], cells[i + 4], cells[i + 8], cells[i + 12] };
outputCells[i] = mult14[row[0]] ^ mult11[row[1]] ^ mult13[row[2]] ^ mult9[row[3]];
outputCells[i + 4] = mult9[row[0]] ^ mult14[row[1]] ^ mult11[row[2]] ^ mult13[row[3]];
outputCells[i + 8] = mult13[row[0]] ^ mult9[row[1]] ^ mult14[row[2]] ^ mult11[row[3]];
outputCells[i + 12] = mult11[row[0]] ^ mult13[row[1]] ^ mult9[row[2]] ^ mult14[row[3]];
}
return mergeCellsIntoBlock(outputCells);
}
public static void main(String[] args) {
boolean encrypt = false;
BigInteger key = new BigInteger("ffffffffffffffffffffffffffffffff",16);
BigInteger[] roundKeys = keyExpansion(key);
System.out.println("");
// Set plain- and ciphertext test values for key = 1465
BigInteger plaintext = new BigInteger("e96681a693e2f3a33dff9f345dcbbf7f",16);
BigInteger ciphertext = new BigInteger("bc2da831201d8565e4f649cc36297a9b",16);
BigInteger output;
if (encrypt) {
// Initial round
plaintext = addRoundKey(plaintext, roundKeys[0]);
// Main rounds
for (int i = 1; i < 10; i++) {
plaintext = subBytes(plaintext);
plaintext = shiftRows(plaintext);
plaintext = mixColumns(plaintext);
plaintext = addRoundKey(plaintext, roundKeys[i]);
}
// Final round
plaintext = subBytes(plaintext);
plaintext = shiftRows(plaintext);
plaintext = addRoundKey(plaintext, roundKeys[10]);
output = plaintext;
} else {
// Invert final round
ciphertext = addRoundKey(ciphertext, roundKeys[10]);
ciphertext = shiftRowsDec(ciphertext);
ciphertext = subBytesDec(ciphertext);
// Invert main rounds
for (int i = 9; i > 0; i--) {
ciphertext = addRoundKey(ciphertext, roundKeys[i]);
ciphertext = mixColumnsDec(ciphertext);
ciphertext = shiftRowsDec(ciphertext);
ciphertext = subBytesDec(ciphertext);
}
// Invert initial round
ciphertext = addRoundKey(ciphertext, roundKeys[0]);
output = ciphertext;
}
System.out.println(output.toString(16));
}
}