diff options
Diffstat (limited to 'src/lib/tlslite/utils/Python_AES.py')
-rwxr-xr-x | src/lib/tlslite/utils/Python_AES.py | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/src/lib/tlslite/utils/Python_AES.py b/src/lib/tlslite/utils/Python_AES.py deleted file mode 100755 index 657152f89..000000000 --- a/src/lib/tlslite/utils/Python_AES.py +++ /dev/null @@ -1,68 +0,0 @@ -"""Pure-Python AES implementation.""" - -from cryptomath import * - -from AES import * -from rijndael import rijndael - -def new(key, mode, IV): - return Python_AES(key, mode, IV) - -class Python_AES(AES): - def __init__(self, key, mode, IV): - AES.__init__(self, key, mode, IV, "python") - self.rijndael = rijndael(key, 16) - self.IV = IV - - def encrypt(self, plaintext): - AES.encrypt(self, plaintext) - - plaintextBytes = stringToBytes(plaintext) - chainBytes = stringToBytes(self.IV) - - #CBC Mode: For each block... - for x in range(len(plaintextBytes)/16): - - #XOR with the chaining block - blockBytes = plaintextBytes[x*16 : (x*16)+16] - for y in range(16): - blockBytes[y] ^= chainBytes[y] - blockString = bytesToString(blockBytes) - - #Encrypt it - encryptedBytes = stringToBytes(self.rijndael.encrypt(blockString)) - - #Overwrite the input with the output - for y in range(16): - plaintextBytes[(x*16)+y] = encryptedBytes[y] - - #Set the next chaining block - chainBytes = encryptedBytes - - self.IV = bytesToString(chainBytes) - return bytesToString(plaintextBytes) - - def decrypt(self, ciphertext): - AES.decrypt(self, ciphertext) - - ciphertextBytes = stringToBytes(ciphertext) - chainBytes = stringToBytes(self.IV) - - #CBC Mode: For each block... - for x in range(len(ciphertextBytes)/16): - - #Decrypt it - blockBytes = ciphertextBytes[x*16 : (x*16)+16] - blockString = bytesToString(blockBytes) - decryptedBytes = stringToBytes(self.rijndael.decrypt(blockString)) - - #XOR with the chaining block and overwrite the input with output - for y in range(16): - decryptedBytes[y] ^= chainBytes[y] - ciphertextBytes[(x*16)+y] = decryptedBytes[y] - - #Set the next chaining block - chainBytes = blockBytes - - self.IV = bytesToString(chainBytes) - return bytesToString(ciphertextBytes) |