[UNSTABLE] Key/Addy gen now uses kerl.

Unit tests have NOT been updated yet.  Here we go....

Author: todofixthis

iota/crypto/addresses.py

@@ -5,7 +5,7 @@
 from typing import Generator, Iterable, List, MutableSequence
 
 from iota import Address, TRITS_PER_TRYTE, TrytesCompatible
-from iota.crypto import Curl
+from iota.crypto.kerl import Kerl
 from iota.crypto.signing import KeyGenerator, KeyIterator
 from iota.crypto.types import Digest, PrivateKey, Seed
 from iota.exceptions import with_context
@@ -157,7 +157,7 @@ def address_from_digest(digest):
     """
     address_trits = [0] * (Address.LEN * TRITS_PER_TRYTE) # type: MutableSequence[int]
 
-    sponge = Curl()
+    sponge = Kerl()
     sponge.absorb(digest.as_trits())
     sponge.squeeze(address_trits)
 

iota/crypto/signing.py

@@ -6,8 +6,9 @@
 
 from six import PY2
 
-from iota import TRITS_PER_TRYTE, TryteString, TrytesCompatible, Hash
-from iota.crypto import Curl, FRAGMENT_LENGTH, HASH_LENGTH
+from iota import Hash, TRITS_PER_TRYTE, TryteString, TrytesCompatible
+from iota.crypto import FRAGMENT_LENGTH, HASH_LENGTH
+from iota.crypto.kerl import Kerl
 from iota.crypto.types import PrivateKey, Seed
 from iota.exceptions import with_context
 
@@ -293,7 +294,7 @@ def advance(self):
     self.current += self.step
 
   def _create_sponge(self, index):
-    # type: (int) -> Curl
+    # type: (int) -> Kerl
     """
     Prepares the Curl sponge for the generator.
     """
@@ -311,7 +312,7 @@ def _create_sponge(self, index):
         else:
           break
 
-    sponge = Curl()
+    sponge = Kerl()
     sponge.absorb(seed)
 
     # Squeeze all of the trits out of the sponge and re-absorb them.
@@ -338,7 +339,7 @@ def __init__(self, private_key, hash_):
     self._key_chunks      = private_key.iter_chunks(FRAGMENT_LENGTH)
     self._iteration       = -1
     self._normalized_hash = normalize(hash_)
-    self._sponge          = Curl()
+    self._sponge          = Kerl()
 
   def __iter__(self):
     # type: () -> SignatureFragmentGenerator
@@ -409,7 +410,7 @@ def validate_signature_fragments(fragments, hash_, public_key):
   normalized_hash = normalize(hash_)
 
   for (i, fragment) in enumerate(fragments): # type: Tuple[int, TryteString]
-    outer_sponge = Curl()
+    outer_sponge = Kerl()
 
     # If there are more than 3 iterations, loop back around to the
     # start.
@@ -418,7 +419,7 @@ def validate_signature_fragments(fragments, hash_, public_key):
     buffer = []
     for (j, hash_trytes) in enumerate(fragment.iter_chunks(Hash.LEN)): # type: Tuple[int, TryteString]
       buffer        = hash_trytes.as_trits() # type: MutableSequence[int]
-      inner_sponge  = Curl()
+      inner_sponge  = Kerl()
 
       # Note the sign flip compared to ``SignatureFragmentGenerator``.
       for _ in range(13 + normalized_chunk[j]):
@@ -432,7 +433,7 @@ def validate_signature_fragments(fragments, hash_, public_key):
     checksum[i*HASH_LENGTH:(i+1)*HASH_LENGTH] = buffer
 
   actual_public_key = [0] * HASH_LENGTH # type: MutableSequence[int]
-  addy_sponge = Curl()
+  addy_sponge = Kerl()
   addy_sponge.absorb(checksum)
   addy_sponge.squeeze(actual_public_key)
 

iota/crypto/types.py

@@ -4,7 +4,8 @@
 
 from typing import MutableSequence, Optional, Tuple
 
-from iota.crypto import Curl, FRAGMENT_LENGTH, HASH_LENGTH
+from iota.crypto import FRAGMENT_LENGTH, HASH_LENGTH
+from iota.crypto.kerl import Kerl
 from iota.exceptions import with_context
 from iota.transaction.base import Bundle
 from iota.types import Hash, TryteString, TrytesCompatible
@@ -157,7 +158,7 @@ def get_digest(self):
         hash_trits  = fragment_trits[hash_start:hash_end] # type: MutableSequence[int]
 
         for k in range(26):
-          sponge = Curl()
+          sponge = Kerl()
           sponge.absorb(hash_trits)
           sponge.squeeze(hash_trits)
 
@@ -170,7 +171,7 @@ def get_digest(self):
       # Note that we will do this once per fragment in the key, so the
       # longer the key is, the longer the digest will be.
       #
-      sponge = Curl()
+      sponge = Kerl()
       sponge.absorb(key_fragment)
       sponge.squeeze(hash_trits)