diff options
Diffstat (limited to 'src/add_python/lilliput/helpers.py')
| -rw-r--r-- | src/add_python/lilliput/helpers.py | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/src/add_python/lilliput/helpers.py b/src/add_python/lilliput/helpers.py index 8677f06..65989d0 100644 --- a/src/add_python/lilliput/helpers.py +++ b/src/add_python/lilliput/helpers.py @@ -2,7 +2,7 @@ from .constants import BLOCK_BITS, BLOCK_BYTES from . import tbc -def ArrayToBlockbytesMatrix(array): +def bytes_to_block_matrix(array): vector = list(array) blocks_nb = len(vector)//BLOCK_BYTES @@ -24,20 +24,20 @@ def ArrayToBlockbytesMatrix(array): return matrix -def BlockbytesMatrixToBytes(matrix): +def block_matrix_to_bytes(matrix): return bytes(byte for block in matrix for byte in block) -def XorState(state1, state2): +def xor_state(state1, state2): return [s1^s2 for (s1, s2) in zip(state1, state2)] -def Padding10LSB(X): +def pad10(X): zeroes = [0] * (BLOCK_BYTES-len(X)-1) return zeroes + [0b10000000] + X -def _tweakAssociatedData(t, i, padded): +def _tweak_associated_data(t, i, padded): t_bytes = t//8 tweak = [0]*(t_bytes) @@ -56,25 +56,25 @@ def _tweakAssociatedData(t, i, padded): return tweak -def BuildAuth(t, A, key): +def build_auth(t, A, key): Auth = [0 for byte in range(0, BLOCK_BYTES)] l_a = len(A)//BLOCK_BYTES need_padding = len(A)%BLOCK_BYTES > 0 - A = ArrayToBlockbytesMatrix(A) + A = bytes_to_block_matrix(A) for i in range(0, l_a): - tweak = _tweakAssociatedData(t, i, padded=False) + tweak = _tweak_associated_data(t, i, padded=False) enc = tbc.encrypt(tweak, key, A[i]) - Auth = XorState(Auth, enc) + Auth = xor_state(Auth, enc) if not need_padding: return Auth - tweak = _tweakAssociatedData(t, l_a, padded=True) - ad_padded = Padding10LSB(A[l_a]) + tweak = _tweak_associated_data(t, l_a, padded=True) + ad_padded = pad10(A[l_a]) enc = tbc.encrypt(tweak, key, ad_padded) - Auth = XorState(Auth, enc) + Auth = xor_state(Auth, enc) return Auth |