typo

draft-irtf-cfrg-vdaf.md

@@ -1691,12 +1691,9 @@ class PrgSha3(Prg):
         # allows stateful handling of the stream.
         # The length of dst, the domain separation string, should be <256 bytes
         # A longer dst will cause an OverflowError
-        dst_length = len(dst).__to_bytes(1) #one byte value
+        dst_length = len(dst).to_bytes(1) #one byte value
         stream = SHAKE128(dst_length + dst + self.x, self.l)
         return stream[-length:]
-
-    def __to_bytes__(self, i):
-        return i.to_bytes(1, byteorder = 'little)
 ~~~
 {: title="Definition of PRG PrgSha3."}
 
@@ -1731,7 +1728,7 @@ class PrgFixedKeyAes128(Prg):
         # evaluations with many different seeds.
         # The length of dst, the domain separation string, should be <256 bytes
         # A longer dst will cause an OverflowError
-        dst_length = len(dst).__to_bytes(1) #one byte value
+        dst_length = len(dst).to_bytes(1) #one byte value
         self.fixed_key = SHAKE128(dst_length + dst + binder, 16)
         self.seed = seed
 

poc/prg.py

@@ -107,7 +107,7 @@ def __init__(self, seed, dst, binder):
         # `dst` is used for domain separation; `seed || binder` is
         # used as the main input string.
         self.shake = SHAKE128.new()
-        dst_length = len(dst).__to_bytes__(1)  # one byte value
+        dst_length = len(dst).to_bytes(1)  # one byte value
         self.shake.update(dst_length)
         self.shake.update(dst)
         self.shake.update(seed)
@@ -140,7 +140,7 @@ def __init__(self, seed, dst, binder):
         # Implementation note: This step can be cached across PRG
         # evaluations with many different seeds.
         shake = SHAKE128.new()
-        dst_length = len(dst).__to_bytes__(1)  # one byte value
+        dst_length = len(dst).to_bytes(1)  # one byte value
         shake.update(dst_length)
         shake.update(dst)
         shake.update(binder)