Merge branch 'fix-concatenation'

1 files changed, 5 insertions, 5 deletions

diff --git a/src/add_python/lilliput/ae_common.py b/src/add_python/lilliput/ae_common.py
index b94be1b..db14ec3 100644
--- a/src/add_python/lilliput/ae_common.py
+++ b/src/add_python/lilliput/ae_common.py
@@ -15,7 +15,7 @@
 """Helper functions used in both Lilliput-I and Lilliput-II."""
 
 
-from .constants import BLOCK_BITS, BLOCK_BYTES
+from .constants import BLOCK_BYTES
 from .helpers import xor
 from . import tbc
 
@@ -48,11 +48,11 @@ def block_matrix_to_bytes(matrix):
 
 def pad10(X):
     zeroes = [0] * (BLOCK_BYTES-len(X)-1)
-    return zeroes + [0b10000000] + X
+    return X + [0b10000000] + zeroes
 
 
 def integer_to_byte_array(i, n):
-    return list(i.to_bytes(n, 'little'))
+    return list(i.to_bytes(n, 'big'))
 
 
 def _tweak_associated_data(t, i, padded):
@@ -61,8 +61,8 @@ def _tweak_associated_data(t, i, padded):
     prefix = 0b0110 if padded else 0b0010
 
     # Clear upper 4 bits and set them to prefix.
-    tweak[-1] &= 0b00001111
-    tweak[-1] = prefix << 4
+    tweak[0] &= 0b00001111
+    tweak[0] |= prefix << 4
 
     return tweak