[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

ciphers/aes_128.py

@@ -10,28 +10,267 @@
 
 # Precomputed S-Box for byte substitution
 S_BOX = (
-    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,
+    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,
 )
 
 # Round constants used for key expansion
-RCON = (
-    0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36
-)
+RCON = (0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36)
+
 
 def sub_bytes(state: list[int]) -> None:
     """
@@ -40,6 +279,7 @@ def sub_bytes(state: list[int]) -> None:
     for i in range(16):
         state[i] = S_BOX[state[i]]
 
+
 def shift_rows(state: list[int]) -> None:
     """
     Shifts the rows of the 4x4 state matrix.
@@ -52,6 +292,7 @@ def shift_rows(state: list[int]) -> None:
     # Row 3: shifted left by 3
     state[3], state[7], state[11], state[15] = state[15], state[3], state[7], state[11]
 
+
 def galois_multiply(a: int, b: int) -> int:
     """
     Multiplies two numbers in the GF(2^8) Galois field.
@@ -67,6 +308,7 @@ def galois_multiply(a: int, b: int) -> int:
         b >>= 1
     return p % 256
 
+
 def mix_columns(state: list[int]) -> None:
     """
     Mixes the columns of the state matrix to provide diffusion.
@@ -86,13 +328,15 @@ def mix_columns(state: list[int]) -> None:
             galois_multiply(col[0], 3) ^ col[1] ^ col[2] ^ galois_multiply(col[3], 2)
         )
 
+
 def add_round_key(state: list[int], round_key: list[int]) -> None:
     """
     XORs the state matrix with the current round key.
     """
     for i in range(16):
         state[i] ^= round_key[i]
 
+
 def key_expansion(key: bytes) -> list[int]:
     """
     Expands a 16-byte key into 11 round keys (176 bytes total).
@@ -107,23 +351,24 @@ def key_expansion(key: bytes) -> list[int]:
             word = [S_BOX[b] for b in word]
             # XOR RCON
             word[0] ^= RCON[i // 4]
-            
+
         for j in range(4):
             key_schedule.append(key_schedule[(i - 4) * 4 + j] ^ word[j])
-            
+
     return key_schedule
 
+
 def aes_128_encrypt_block(plaintext: bytes, key: bytes) -> bytes:
     """
     Encrypts a single 16-byte block of plaintext using AES-128.
-    
+
     Args:
         plaintext: Exactly 16 bytes of data.
         key: Exactly 16 bytes of encryption key.
-        
+
     Returns:
         16 bytes of encrypted ciphertext.
-        
+
     Raises:
         ValueError: If plaintext or key are not exactly 16 bytes.
 
@@ -137,7 +382,7 @@ def aes_128_encrypt_block(plaintext: bytes, key: bytes) -> bytes:
     """
     if len(plaintext) != 16 or len(key) != 16:
         raise ValueError("Plaintext and Key must be exactly 16 bytes long.")
-        
+
     state = list(plaintext)
     expanded_key = key_expansion(key)
 
@@ -158,7 +403,8 @@ def aes_128_encrypt_block(plaintext: bytes, key: bytes) -> bytes:
 
     return bytes(state)
 
+
 if __name__ == "__main__":
     import doctest
 
-    doctest.testmod()
+    doctest.testmod()