Python - Elliptic Curve Cryptography - Public Key Cryptography、Programming Signature Verification

Programming Bitcoin
Learn How to Program Bitcoin from Scratch
楽天ブックス(Kobo) 紀伊國屋書店(Kinoppy)

開発環境

• macOS Mojave - Apple (OS)
• Emacs (Text Editor)
• Windows 10 Pro (OS)
• Visual Studio Code (Text Editor)
• Python 3.7 (プログラミング言語)

Programming Bitcoin: Learn How to Program Bitcoin from Scratch (Jimmy Song(著)、O'Reilly Media)のChapter 3(Elliptic Curve Cryptography)、Public Key Cryptography、Programming Signature Verification、Exercises 7(69)の解答を求めてみる。

コード

Python 3

#!/usr/bin/env python3
from ecc import S256Point, G, N
from helper import hash256

e = 12345
z = int.from_bytes(hash256(b'Programming Bitcoin!'), 'big')
k = 1234567890
r = (k * G).x.num
k_inv = pow(k, N - 2, N)
s = (z + r * e) * k_inv % N
point = e * G

for o in [point] + [hex(t) for t in [z, r, s]]:
    print(o)

入出力結果(cmd(コマンドプロンプト)、Terminal、Jupyter(IPython))

C:\Users\...>py sample7.py
S256Point(f01d6b9018ab421dd410404cb869072065522bf85734008f105cf385a023a80f, 0eba29d0f0c5408ed681984dc525982abefccd9f7ff01dd26da4999cf3f6a295)
0x969f6056aa26f7d2795fd013fe88868d09c9f6aed96965016e1936ae47060d48
0x2b698a0f0a4041b77e63488ad48c23e8e8838dd1fb7520408b121697b782ef22
0x1dbc63bfef4416705e602a7b564161167076d8b20990a0f26f316cff2cb0bc1a

C:\Users\...>