Repository: bozhu/AES-Python
Branch: master
Commit: c9c19a71f576
Files: 3
Total size: 11.0 KB
Directory structure:
gitextract_rxkbg_5w/
├── README.md
├── aes.py
└── test.py
================================================
FILE CONTENTS
================================================
================================================
FILE: README.md
================================================
A pure Python implementation of [AES](http://en.wikipedia.org/wiki/Advanced_Encryption_Standard)
### TODO
* Add 192 and 256 bit versions
### License
Copyright (C) 2012 Bo Zhu http://about.bozhu.me
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
================================================
FILE: aes.py
================================================
#!/usr/bin/env python
"""
Copyright (C) 2012 Bo Zhu http://about.bozhu.me
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
"""
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,
)
InvSbox = (
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,
)
# learnt from http://cs.ucsb.edu/~koc/cs178/projects/JT/aes.c
xtime = lambda a: (((a << 1) ^ 0x1B) & 0xFF) if (a & 0x80) else (a << 1)
Rcon = (
0x00, 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,
)
def text2matrix(text):
matrix = []
for i in range(16):
byte = (text >> (8 * (15 - i))) & 0xFF
if i % 4 == 0:
matrix.append([byte])
else:
matrix[i / 4].append(byte)
return matrix
def matrix2text(matrix):
text = 0
for i in range(4):
for j in range(4):
text |= (matrix[i][j] << (120 - 8 * (4 * i + j)))
return text
class AES:
def __init__(self, master_key):
self.change_key(master_key)
def change_key(self, master_key):
self.round_keys = text2matrix(master_key)
# print self.round_keys
for i in range(4, 4 * 11):
self.round_keys.append([])
if i % 4 == 0:
byte = self.round_keys[i - 4][0] \
^ Sbox[self.round_keys[i - 1][1]] \
^ Rcon[i / 4]
self.round_keys[i].append(byte)
for j in range(1, 4):
byte = self.round_keys[i - 4][j] \
^ Sbox[self.round_keys[i - 1][(j + 1) % 4]]
self.round_keys[i].append(byte)
else:
for j in range(4):
byte = self.round_keys[i - 4][j] \
^ self.round_keys[i - 1][j]
self.round_keys[i].append(byte)
# print self.round_keys
def encrypt(self, plaintext):
self.plain_state = text2matrix(plaintext)
self.__add_round_key(self.plain_state, self.round_keys[:4])
for i in range(1, 10):
self.__round_encrypt(self.plain_state, self.round_keys[4 * i : 4 * (i + 1)])
self.__sub_bytes(self.plain_state)
self.__shift_rows(self.plain_state)
self.__add_round_key(self.plain_state, self.round_keys[40:])
return matrix2text(self.plain_state)
def decrypt(self, ciphertext):
self.cipher_state = text2matrix(ciphertext)
self.__add_round_key(self.cipher_state, self.round_keys[40:])
self.__inv_shift_rows(self.cipher_state)
self.__inv_sub_bytes(self.cipher_state)
for i in range(9, 0, -1):
self.__round_decrypt(self.cipher_state, self.round_keys[4 * i : 4 * (i + 1)])
self.__add_round_key(self.cipher_state, self.round_keys[:4])
return matrix2text(self.cipher_state)
def __add_round_key(self, s, k):
for i in range(4):
for j in range(4):
s[i][j] ^= k[i][j]
def __round_encrypt(self, state_matrix, key_matrix):
self.__sub_bytes(state_matrix)
self.__shift_rows(state_matrix)
self.__mix_columns(state_matrix)
self.__add_round_key(state_matrix, key_matrix)
def __round_decrypt(self, state_matrix, key_matrix):
self.__add_round_key(state_matrix, key_matrix)
self.__inv_mix_columns(state_matrix)
self.__inv_shift_rows(state_matrix)
self.__inv_sub_bytes(state_matrix)
def __sub_bytes(self, s):
for i in range(4):
for j in range(4):
s[i][j] = Sbox[s[i][j]]
def __inv_sub_bytes(self, s):
for i in range(4):
for j in range(4):
s[i][j] = InvSbox[s[i][j]]
def __shift_rows(self, s):
s[0][1], s[1][1], s[2][1], s[3][1] = s[1][1], s[2][1], s[3][1], s[0][1]
s[0][2], s[1][2], s[2][2], s[3][2] = s[2][2], s[3][2], s[0][2], s[1][2]
s[0][3], s[1][3], s[2][3], s[3][3] = s[3][3], s[0][3], s[1][3], s[2][3]
def __inv_shift_rows(self, s):
s[0][1], s[1][1], s[2][1], s[3][1] = s[3][1], s[0][1], s[1][1], s[2][1]
s[0][2], s[1][2], s[2][2], s[3][2] = s[2][2], s[3][2], s[0][2], s[1][2]
s[0][3], s[1][3], s[2][3], s[3][3] = s[1][3], s[2][3], s[3][3], s[0][3]
def __mix_single_column(self, a):
# please see Sec 4.1.2 in The Design of Rijndael
t = a[0] ^ a[1] ^ a[2] ^ a[3]
u = a[0]
a[0] ^= t ^ xtime(a[0] ^ a[1])
a[1] ^= t ^ xtime(a[1] ^ a[2])
a[2] ^= t ^ xtime(a[2] ^ a[3])
a[3] ^= t ^ xtime(a[3] ^ u)
def __mix_columns(self, s):
for i in range(4):
self.__mix_single_column(s[i])
def __inv_mix_columns(self, s):
# see Sec 4.1.3 in The Design of Rijndael
for i in range(4):
u = xtime(xtime(s[i][0] ^ s[i][2]))
v = xtime(xtime(s[i][1] ^ s[i][3]))
s[i][0] ^= u
s[i][1] ^= v
s[i][2] ^= u
s[i][3] ^= v
self.__mix_columns(s)
================================================
FILE: test.py
================================================
__author__ = 'yousefhamza'
import unittest
from aes import AES
class AES_TEST(unittest.TestCase):
def setUp(self):
master_key = 0x2b7e151628aed2a6abf7158809cf4f3c
self.AES = AES(master_key)
def test_encryption(self):
plaintext = 0x3243f6a8885a308d313198a2e0370734
encrypted = self.AES.encrypt(plaintext)
self.assertEqual(encrypted, 0x3925841d02dc09fbdc118597196a0b32)
def test_decryption(self):
ciphertext = 0x3925841d02dc09fbdc118597196a0b32
decrypted = self.AES.decrypt(ciphertext)
self.assertEqual(decrypted, 0x3243f6a8885a308d313198a2e0370734)
if __name__ == '__main__':
unittest.main()
gitextract_rxkbg_5w/ ├── README.md ├── aes.py └── test.py
SYMBOL INDEX (21 symbols across 2 files)
FILE: aes.py
function text2matrix (line 77) | def text2matrix(text):
function matrix2text (line 88) | def matrix2text(matrix):
class AES (line 96) | class AES:
method __init__ (line 97) | def __init__(self, master_key):
method change_key (line 100) | def change_key(self, master_key):
method encrypt (line 124) | def encrypt(self, plaintext):
method decrypt (line 138) | def decrypt(self, ciphertext):
method __add_round_key (line 152) | def __add_round_key(self, s, k):
method __round_encrypt (line 158) | def __round_encrypt(self, state_matrix, key_matrix):
method __round_decrypt (line 165) | def __round_decrypt(self, state_matrix, key_matrix):
method __sub_bytes (line 171) | def __sub_bytes(self, s):
method __inv_sub_bytes (line 177) | def __inv_sub_bytes(self, s):
method __shift_rows (line 183) | def __shift_rows(self, s):
method __inv_shift_rows (line 189) | def __inv_shift_rows(self, s):
method __mix_single_column (line 194) | def __mix_single_column(self, a):
method __mix_columns (line 204) | def __mix_columns(self, s):
method __inv_mix_columns (line 209) | def __inv_mix_columns(self, s):
FILE: test.py
class AES_TEST (line 6) | class AES_TEST(unittest.TestCase):
method setUp (line 7) | def setUp(self):
method test_encryption (line 11) | def test_encryption(self):
method test_decryption (line 17) | def test_decryption(self):
Condensed preview — 3 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (12K chars).
[
{
"path": "README.md",
"chars": 1289,
"preview": "A pure Python implementation of [AES](http://en.wikipedia.org/wiki/Advanced_Encryption_Standard)\n\n### TODO\n\n* Add 192 an"
},
{
"path": "aes.py",
"chars": 9287,
"preview": "#!/usr/bin/env python\n\n\n\"\"\"\n Copyright (C) 2012 Bo Zhu http://about.bozhu.me\n\n Permission is hereby granted, free "
},
{
"path": "test.py",
"chars": 677,
"preview": "__author__ = 'yousefhamza'\n\nimport unittest\nfrom aes import AES\n\nclass AES_TEST(unittest.TestCase):\n def setUp(self):"
}
]
About this extraction
This page contains the full source code of the bozhu/AES-Python GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 3 files (11.0 KB), approximately 5.3k tokens, and a symbol index with 21 extracted functions, classes, methods, constants, and types. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.
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