1 files changed, 57 insertions, 3 deletions
diff --git a/hypervideo_dl/aes.py b/hypervideo_dl/aes.py
index 60cdeb7..b37f0dd 100644
--- a/hypervideo_dl/aes.py
+++ b/hypervideo_dl/aes.py
@@ -2,8 +2,15 @@ from __future__ import unicode_literals
 
 from math import ceil
 
-from .compat import compat_b64decode, compat_pycrypto_AES
-from .utils import bytes_to_intlist, intlist_to_bytes
+from .compat import (
+    compat_b64decode,
+    compat_ord,
+    compat_pycrypto_AES,
+)
+from .utils import (
+    bytes_to_intlist,
+    intlist_to_bytes,
+)
 
 
 if compat_pycrypto_AES:
@@ -25,9 +32,55 @@ else:
         return intlist_to_bytes(aes_gcm_decrypt_and_verify(*map(bytes_to_intlist, (data, key, tag, nonce))))
 
 
+def unpad_pkcs7(data):
+    return data[:-compat_ord(data[-1])]
+
+
 BLOCK_SIZE_BYTES = 16
 
 
+def aes_ecb_encrypt(data, key, iv=None):
+    """
+    Encrypt with aes in ECB mode
+
+    @param {int[]} data        cleartext
+    @param {int[]} key         16/24/32-Byte cipher key
+    @param {int[]} iv          Unused for this mode
+    @returns {int[]}           encrypted data
+    """
+    expanded_key = key_expansion(key)
+    block_count = int(ceil(float(len(data)) / BLOCK_SIZE_BYTES))
+
+    encrypted_data = []
+    for i in range(block_count):
+        block = data[i * BLOCK_SIZE_BYTES: (i + 1) * BLOCK_SIZE_BYTES]
+        encrypted_data += aes_encrypt(block, expanded_key)
+    encrypted_data = encrypted_data[:len(data)]
+
+    return encrypted_data
+
+
+def aes_ecb_decrypt(data, key, iv=None):
+    """
+    Decrypt with aes in ECB mode
+
+    @param {int[]} data        cleartext
+    @param {int[]} key         16/24/32-Byte cipher key
+    @param {int[]} iv          Unused for this mode
+    @returns {int[]}           decrypted data
+    """
+    expanded_key = key_expansion(key)
+    block_count = int(ceil(float(len(data)) / BLOCK_SIZE_BYTES))
+
+    encrypted_data = []
+    for i in range(block_count):
+        block = data[i * BLOCK_SIZE_BYTES: (i + 1) * BLOCK_SIZE_BYTES]
+        encrypted_data += aes_decrypt(block, expanded_key)
+    encrypted_data = encrypted_data[:len(data)]
+
+    return encrypted_data
+
+
 def aes_ctr_decrypt(data, key, iv):
     """
     Decrypt with aes in counter mode
@@ -464,5 +517,6 @@ __all__ = [
     'aes_encrypt',
     'aes_gcm_decrypt_and_verify',
     'aes_gcm_decrypt_and_verify_bytes',
-    'key_expansion'
+    'key_expansion',
+    'unpad_pkcs7',
 ]