From ef99b3faf2b819881f5677453e22161c1ae3cc00 Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Tue, 24 Aug 2021 17:56:19 +0300
Subject: [PATCH] =?utf8?q?DJB=20=D1=82=D0=BE=20=D0=BD=D0=B5=20=D1=81=D0=B2?=
 =?utf8?q?=D1=8F=D1=82=D0=BE=D0=B9,=20=D0=BA=D0=BE=D1=81=D1=8F=D1=87=D0=B8?=
 =?utf8?q?=D1=82=20=D0=B2=20=D1=81=D0=B2=D0=BE=D1=91=D0=BC=20Python=20?=
 =?utf8?q?=D0=BA=D0=BE=D0=B4=D0=B5?=
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http://ed25519.cr.yp.to/python/sign.py
Ð Ð½ÑÐ¼ ÐµÑÑÑ Ð²Ð¾Ñ ÑÐ°ÐºÐ°Ñ ÑÑÑÐ¾ÑÐºÐ°, ÐºÐ¾ÑÐ¾ÑÐ°Ñ Ð´Ð¾Ð»Ð¶Ð½Ð° ÑÑÑÑ-ÑÑÑÑ Ð¸Ð·Ð¼ÐµÐ½Ð¸ÑÑ Ð¸Ð·Ð¼ÐµÐ½Ð¸ÑÑ
ÑÐ¾Ð¾Ð±ÑÐµÐ½Ð¸Ðµ Ð¸ ÑÐ±ÐµÐ´Ð¸ÑÑÑÑ ÑÑÐ¾ ÑÑÐ½ÐºÑÐ¸Ñ Ð¿ÑÐ¾Ð²ÐµÑÐºÐ¸ ÑÐ¿Ð°Ð´ÑÑ:

    try:
        forgedm = ''.join([chr(ord(m[i])+(i==forgedmlen-1)) for i in range(len(m))])
        ed25519.checkvalid(s,forgedm,pk)
        forgedsuccess = 1
    except:
        pass
    assert not forgedsuccess

Ð²Ð¾Ñ ÑÐ¾Ð»ÑÐºÐ¾ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ð° Ð² ÑÐ¾Ð¼, ÑÑÐ¾ ÐµÑÐ»Ð¸ Ð·Ð½Ð°ÑÐµÐ½Ð¸Ðµ Ð¿Ð¾ÑÐ»ÐµÐ´Ð½ÐµÐ³Ð¾ Ð±Ð°Ð¹ÑÐ° Ð±ÑÐ´ÐµÑ
0xFF, ÑÐ¾... Ð¿ÑÐ¸ Ð¿ÐµÑÐµÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ð¸ Python Ð±ÑÐ´ÐµÑ ÑÑÐ³Ð°ÑÑÑÑ Ð½Ð° range(256). ÐÑÐ¸
ÑÑÐ¾Ð¼ Ð²Ð¾Ð·Ð½Ð¸ÐºÐ½ÐµÑ exception Ð¸ ÑÐµÑÑ Ð¿Ð¾ÑÑÐ¸ÑÐ°ÐµÑ ÑÑÐ¾ Ð¼Ñ ÑÑÐ°ÑÐ½Ð¾ ÑÐ¿Ð°Ð»Ð¸, ÐºÐ°Ðº Ð¸
Ð¾Ð¶Ð¸Ð´Ð°Ð»Ð¸. ÐÐ¾Ñ Ð½Ðµ Ð½Ð°Ð´Ð¾ Ð´ÐµÐ»Ð°ÑÑ checkvalid Ð²ÑÐ±ÑÐ°ÑÑÐ²Ð°ÑÑÐ¸Ð¼ Ð¸ÑÐºÐ»ÑÑÐµÐ½Ð¸Ñ, Ð½Ñ Ð²Ð¾Ñ
Ð·Ð°ÑÐµÐ¼, DJB, ÑÑ ÑÑÐ¾ ÑÐ´ÐµÐ»Ð°Ð»?
-- 
2.50.0