X-Git-Url: http://www.git.cypherpunks.ru/?p=pygost.git;a=blobdiff_plain;f=pygost%2Fgost28147.py;h=74f5e877add7e7945d824d73e2cf237d09a54bb1;hp=b7fc0f46634d5589cb41b3bdef10feff8d2e4c84;hb=31b08d5a78505f0ae1a144e58d023d84eda2cc6e;hpb=82af8726ef5d5e2752089a45750e56c9910398c7

diff --git a/pygost/gost28147.py b/pygost/gost28147.py
index b7fc0f4..74f5e87 100644
--- a/pygost/gost28147.py
+++ b/pygost/gost28147.py
@@ -13,7 +13,7 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-""" GOST 28147-89 block cipher
+"""GOST 28147-89 block cipher
 
 This is implementation of :rfc:`5830` ECB, CNT, CFB and :rfc:`4357`
 CBC modes of operation. N1, N2, K names are taken according to
@@ -148,7 +148,7 @@ SBOXES["AppliedCryptography"] = SBOXES["id-GostR3411-94-TestParamSet"]
 
 
 def _K(s, _in):
-    """ S-box substitution
+    """S-box substitution
 
     :param s: S-box
     :param _in: 32-bit word
@@ -167,7 +167,7 @@ def _K(s, _in):
 
 
 def block2ns(data):
-    """ Convert block to N1 and N2 integers
+    """Convert block to N1 and N2 integers
     """
     data = bytearray(data)
     return (
@@ -177,7 +177,7 @@ def block2ns(data):
 
 
 def ns2block(ns):
-    """ Convert N1 and N2 integers to 8-byte block
+    """Convert N1 and N2 integers to 8-byte block
     """
     n1, n2 = ns
     return bytes(bytearray((
@@ -187,7 +187,7 @@ def ns2block(ns):
 
 
 def _shift11(x):
-    """ 11-bit cyclic shift
+    """11-bit cyclic shift
     """
     return ((x << 11) & (2 ** 32 - 1)) | ((x >> (32 - 11)) & (2 ** 32 - 1))
 
@@ -208,7 +208,7 @@ def validate_sbox(sbox):
 
 
 def xcrypt(seq, sbox, key, ns):
-    """ Perform full-round single-block operation
+    """Perform full-round single-block operation
 
     :param seq: sequence of K_i S-box applying (either encrypt or decrypt)
     :param sbox: S-box parameters to use
@@ -234,19 +234,19 @@ def xcrypt(seq, sbox, key, ns):
 
 
 def encrypt(sbox, key, ns):
-    """ Encrypt single block
+    """Encrypt single block
     """
     return xcrypt(SEQ_ENCRYPT, sbox, key, ns)
 
 
 def decrypt(sbox, key, ns):
-    """ Decrypt single block
+    """Decrypt single block
     """
     return xcrypt(SEQ_DECRYPT, sbox, key, ns)
 
 
 def ecb(key, data, action, sbox=DEFAULT_SBOX):
-    """ ECB mode of operation
+    """ECB mode of operation
 
     :param bytes key: encryption key
     :param data: plaintext
@@ -274,7 +274,7 @@ ecb_decrypt = partial(ecb, action=decrypt)
 
 
 def cbc_encrypt(key, data, iv=8 * b"\x00", pad=True, sbox=DEFAULT_SBOX, mesh=False):
-    """ CBC encryption mode of operation
+    """CBC encryption mode of operation
 
     :param bytes key: encryption key
     :param bytes data: plaintext
@@ -309,7 +309,7 @@ def cbc_encrypt(key, data, iv=8 * b"\x00", pad=True, sbox=DEFAULT_SBOX, mesh=Fal
 
 
 def cbc_decrypt(key, data, pad=True, sbox=DEFAULT_SBOX, mesh=False):
-    """ CBC decryption mode of operation
+    """CBC decryption mode of operation
 
     :param bytes key: encryption key
     :param bytes data: ciphertext
@@ -345,7 +345,7 @@ def cbc_decrypt(key, data, pad=True, sbox=DEFAULT_SBOX, mesh=False):
 
 
 def cnt(key, data, iv=8 * b"\x00", sbox=DEFAULT_SBOX):
-    """ Counter mode of operation
+    """Counter mode of operation
 
     :param bytes key: encryption key
     :param bytes data: plaintext
@@ -385,7 +385,7 @@ def meshing(key, iv, sbox=DEFAULT_SBOX):
 
 
 def cfb_encrypt(key, data, iv=8 * b"\x00", sbox=DEFAULT_SBOX, mesh=False):
-    """ CFB encryption mode of operation
+    """CFB encryption mode of operation
 
     :param bytes key: encryption key
     :param bytes data: plaintext
@@ -419,7 +419,7 @@ def cfb_encrypt(key, data, iv=8 * b"\x00", sbox=DEFAULT_SBOX, mesh=False):
 
 
 def cfb_decrypt(key, data, iv=8 * b"\x00", sbox=DEFAULT_SBOX, mesh=False):
-    """ CFB decryption mode of operation
+    """CFB decryption mode of operation
 
     :param bytes key: encryption key
     :param bytes data: plaintext