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　晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 . Prv8 Shell

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Current File : //usr/share/doc/python3-cryptography/docs/development/custom-vectors/secp256k1/verify_secp256k1.py

from __future__ import absolute_import, print_function

import os

from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric import ec
from cryptography.hazmat.primitives.asymmetric.utils import (
    encode_dss_signature,
)

from tests.utils import load_fips_ecdsa_signing_vectors, load_vectors_from_file

CRYPTOGRAPHY_HASH_TYPES = {
    "SHA-1": hashes.SHA1,
    "SHA-224": hashes.SHA224,
    "SHA-256": hashes.SHA256,
    "SHA-384": hashes.SHA384,
    "SHA-512": hashes.SHA512,
}


def verify_one_vector(vector):
    digest_algorithm = vector["digest_algorithm"]
    message = vector["message"]
    x = vector["x"]
    y = vector["y"]
    signature = encode_dss_signature(vector["r"], vector["s"])

    numbers = ec.EllipticCurvePublicNumbers(x, y, ec.SECP256K1())

    key = numbers.public_key(default_backend())

    verifier = key.verifier(
        signature, ec.ECDSA(CRYPTOGRAPHY_HASH_TYPES[digest_algorithm]())
    )
    verifier.update(message)
    verifier.verify()


def verify_vectors(vectors):
    for vector in vectors:
        verify_one_vector(vector)


vector_path = os.path.join("asymmetric", "ECDSA", "SECP256K1", "SigGen.txt")

secp256k1_vectors = load_vectors_from_file(
    vector_path, load_fips_ecdsa_signing_vectors
)

verify_vectors(secp256k1_vectors)

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