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ed25519.py: whitespace fixes

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The MMGen Project 2022-01-15 14:00:11 +00:00
commit 2807c628ee
Signed by: mmgen
GPG key ID: 3F8B1861E32B7DA2
1 changed files with 12 additions and 6 deletions
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18
mmgen/ed25519.py
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@ -7,9 +7,11 @@ q = 2**255 - 19
l = 2**252 + 27742317777372353535851937790883648493
def expmod(b, e, m):
if e == 0: return 1
if e == 0:
return 1
t = expmod(b, e//2, m)**2 % m
if e & 1: t = (t*b) % m
if e & 1:
t = (t*b) % m
return t
def inv(x):
@ -21,8 +23,10 @@ I = expmod(2, (q-1)//4, q)
def xrecover(y):
xx = (y*y-1) * inv(d*y*y+1)
x = expmod(xx, (q+3)//8, q)
if (x*x - xx) % q != 0: x = (x*I) % q
if x % 2 != 0: x = q-x
if (x*x - xx) % q != 0:
x = (x*I) % q
if x % 2 != 0:
x = q-x
return x
By = 4 * inv(5)
@ -39,10 +43,12 @@ def edwards(P, Q):
return [x3%q, y3%q]
def scalarmult(P, e):
if e == 0: return [0, 1]
if e == 0:
return [0, 1]
Q = scalarmult(P, e//2)
Q = edwards(Q, Q)
if e & 1: Q = edwards(Q, P)
if e & 1:
Q = edwards(Q, P)
return Q
def encodepoint(P):