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trezorlib: mark ed25519 impl as private

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This commit is contained in:
matejcik 2018-05-25 13:07:02 +02:00
parent 9982ef98f9
commit 886e269e2f
2 changed files with 20 additions and 20 deletions
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0
trezorlib/ed25519raw.py → trezorlib/_ed25519.py
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40
trezorlib/cosi.py
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@ -2,40 +2,40 @@ import sys
from functools import reduce from functools import reduce
import binascii import binascii
from trezorlib import ed25519raw from trezorlib import _ed25519
def combine_keys(pks): def combine_keys(pks):
P = [ed25519raw.decodepoint(pk) for pk in pks] P = [_ed25519.decodepoint(pk) for pk in pks]
combine = reduce(ed25519raw.edwards, P) combine = reduce(_ed25519.edwards, P)
return ed25519raw.encodepoint(combine) return _ed25519.encodepoint(combine)
def combine_sig(R, sigs): def combine_sig(R, sigs):
S = [ed25519raw.decodeint(si) for si in sigs] S = [_ed25519.decodeint(si) for si in sigs]
s = sum(S) % ed25519raw.l s = sum(S) % _ed25519.l
sig = R + ed25519raw.encodeint(s) sig = R + _ed25519.encodeint(s)
return sig return sig
def get_nonce(sk, data, ctr): def get_nonce(sk, data, ctr):
h = ed25519raw.H(sk) h = _ed25519.H(sk)
b = ed25519raw.b b = _ed25519.b
r = ed25519raw.Hint(bytes([h[i] for i in range(b >> 3, b >> 2)]) + data + binascii.unhexlify('%08x' % ctr)) r = _ed25519.Hint(bytes([h[i] for i in range(b >> 3, b >> 2)]) + data + binascii.unhexlify('%08x' % ctr))
R = ed25519raw.scalarmult(ed25519raw.B, r) R = _ed25519.scalarmult(_ed25519.B, r)
return r, ed25519raw.encodepoint(R) return r, _ed25519.encodepoint(R)
def verify(signature, digest, pub_key): def verify(signature, digest, pub_key):
ed25519raw.checkvalid(signature, digest, pub_key) _ed25519.checkvalid(signature, digest, pub_key)
def sign_with_privkey(digest, privkey, global_pubkey, nonce, global_commit): def sign_with_privkey(digest, privkey, global_pubkey, nonce, global_commit):
h = ed25519raw.H(privkey) h = _ed25519.H(privkey)
b = ed25519raw.b b = _ed25519.b
a = 2 ** (b - 2) + sum(2 ** i * ed25519raw.bit(h, i) for i in range(3, b - 2)) a = 2 ** (b - 2) + sum(2 ** i * _ed25519.bit(h, i) for i in range(3, b - 2))
S = (nonce + ed25519raw.Hint(global_commit + global_pubkey + digest) * a) % ed25519raw.l S = (nonce + _ed25519.Hint(global_commit + global_pubkey + digest) * a) % _ed25519.l
return ed25519raw.encodeint(S) return _ed25519.encodeint(S)
def self_test(digest): def self_test(digest):
@ -55,14 +55,14 @@ def self_test(digest):
for i in range(0, N): for i in range(0, N):
print('----- Key %d ------' % (i + 1)) print('----- Key %d ------' % (i + 1))
seckey = (chr(0x41 + i) * 32).encode() seckey = (chr(0x41 + i) * 32).encode()
pubkey = ed25519raw.publickey(seckey) pubkey = _ed25519.publickey(seckey)
print('Secret Key: %s' % to_hex(seckey)) print('Secret Key: %s' % to_hex(seckey))
print('Public Key: %s' % to_hex(pubkey)) print('Public Key: %s' % to_hex(pubkey))
sks.append(seckey) sks.append(seckey)
pks.append(pubkey) pks.append(pubkey)
ctr = 0 ctr = 0
r, R = get_nonce(seckey, digest, ctr) r, R = get_nonce(seckey, digest, ctr)
print('Local nonce: %s' % to_hex(ed25519raw.encodeint(r))) print('Local nonce: %s' % to_hex(_ed25519.encodeint(r)))
print('Local commit: %s' % to_hex(R)) print('Local commit: %s' % to_hex(R))
nonces.append(r) nonces.append(r)
commits.append(R) commits.append(R)