blocks.present.py
Description
The PRESENT block cipher [BKL2007] has reference configurations suitable for essential one text size. Based on that, two key sizes are possible.
PRESENT
Implementation [BKL2007]
- class urca.cpu.blocks.present.Present(text_size: int = 64, key_size: int = 80)
Bases:
Block- decrypt(texts: ndarray, keys: ndarray, current_round: int, n_rounds: int) None
Dencrypt in-place.
- Parameters:
texts (np.ndarray) – ciphertexts
keys (np.ndarray) – keys
current_round (int) – current round
n_rounds (int) – number of decryption rounds
- encrypt(texts: ndarray, keys: ndarray, current_round: int, n_rounds: int) None
Encrypt in-place.
- Parameters:
texts (np.ndarray) – plaintexts
keys (np.ndarray) – keys
current_round (int) – current round
n_rounds (int) – number of encryption rounds
- keysize_to_counterlow = {80: 60, 128: 61}
- keysize_to_keybitsinsbox = {80: 4, 128: 8}
- reversed_sbox = array([ 85, 94, 95, 88, 92, 81, 82, 93, 91, 84, 86, 83, 80, 87, 89, 90, 229, 238, 239, 232, 236, 225, 226, 237, 235, 228, 230, 227, 224, 231, 233, 234, 245, 254, 255, 248, 252, 241, 242, 253, 251, 244, 246, 243, 240, 247, 249, 250, 133, 142, 143, 136, 140, 129, 130, 141, 139, 132, 134, 131, 128, 135, 137, 138, 197, 206, 207, 200, 204, 193, 194, 205, 203, 196, 198, 195, 192, 199, 201, 202, 21, 30, 31, 24, 28, 17, 18, 29, 27, 20, 22, 19, 16, 23, 25, 26, 37, 46, 47, 40, 44, 33, 34, 45, 43, 36, 38, 35, 32, 39, 41, 42, 213, 222, 223, 216, 220, 209, 210, 221, 219, 212, 214, 211, 208, 215, 217, 218, 181, 190, 191, 184, 188, 177, 178, 189, 187, 180, 182, 179, 176, 183, 185, 186, 69, 78, 79, 72, 76, 65, 66, 77, 75, 68, 70, 67, 64, 71, 73, 74, 101, 110, 111, 104, 108, 97, 98, 109, 107, 100, 102, 99, 96, 103, 105, 106, 53, 62, 63, 56, 60, 49, 50, 61, 59, 52, 54, 51, 48, 55, 57, 58, 5, 14, 15, 8, 12, 1, 2, 13, 11, 4, 6, 3, 0, 7, 9, 10, 117, 126, 127, 120, 124, 113, 114, 125, 123, 116, 118, 115, 112, 119, 121, 122, 149, 158, 159, 152, 156, 145, 146, 157, 155, 148, 150, 147, 144, 151, 153, 154, 165, 174, 175, 168, 172, 161, 162, 173, 171, 164, 166, 163, 160, 167, 169, 170], dtype=uint8)
- revert_keys(keys: ndarray, round_number: int) None
Revert the keys in-place.
- Parameters:
keys (np.ndarray) – keys
round_number (int) – current round
- rotation_amount
The amount of the rotation in the key schedule.
- sbox = array([204, 197, 198, 203, 201, 192, 202, 205, 195, 206, 207, 200, 196, 199, 193, 194, 92, 85, 86, 91, 89, 80, 90, 93, 83, 94, 95, 88, 84, 87, 81, 82, 108, 101, 102, 107, 105, 96, 106, 109, 99, 110, 111, 104, 100, 103, 97, 98, 188, 181, 182, 187, 185, 176, 186, 189, 179, 190, 191, 184, 180, 183, 177, 178, 156, 149, 150, 155, 153, 144, 154, 157, 147, 158, 159, 152, 148, 151, 145, 146, 12, 5, 6, 11, 9, 0, 10, 13, 3, 14, 15, 8, 4, 7, 1, 2, 172, 165, 166, 171, 169, 160, 170, 173, 163, 174, 175, 168, 164, 167, 161, 162, 220, 213, 214, 219, 217, 208, 218, 221, 211, 222, 223, 216, 212, 215, 209, 210, 60, 53, 54, 59, 57, 48, 58, 61, 51, 62, 63, 56, 52, 55, 49, 50, 236, 229, 230, 235, 233, 224, 234, 237, 227, 238, 239, 232, 228, 231, 225, 226, 252, 245, 246, 251, 249, 240, 250, 253, 243, 254, 255, 248, 244, 247, 241, 242, 140, 133, 134, 139, 137, 128, 138, 141, 131, 142, 143, 136, 132, 135, 129, 130, 76, 69, 70, 75, 73, 64, 74, 77, 67, 78, 79, 72, 68, 71, 65, 66, 124, 117, 118, 123, 121, 112, 122, 125, 115, 126, 127, 120, 116, 119, 113, 114, 28, 21, 22, 27, 25, 16, 26, 29, 19, 30, 31, 24, 20, 23, 17, 18, 44, 37, 38, 43, 41, 32, 42, 45, 35, 46, 47, 40, 36, 39, 33, 34], dtype=uint8)
- update_keys(keys: ndarray, round_number: int) None
Update the keys in-place.
- Parameters:
keys (np.ndarray) – keys
round_number (int) – current round