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。 .
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Current File : //usr/share/doc/python3-cryptography/docs/development/custom-vectors/seed/generate_seed.py
import binascii

from cryptography.hazmat.backends.openssl.backend import backend
from cryptography.hazmat.primitives.ciphers import algorithms, base, modes


def encrypt(mode, key, iv, plaintext):
    cipher = base.Cipher(
        algorithms.SEED(binascii.unhexlify(key)),
        mode(binascii.unhexlify(iv)),
        backend,
    )
    encryptor = cipher.encryptor()
    ct = encryptor.update(binascii.unhexlify(plaintext))
    ct += encryptor.finalize()
    return binascii.hexlify(ct)


def build_vectors(mode, filename):
    with open(filename, "r") as f:
        vector_file = f.read().splitlines()

    count = 0
    output = []
    key = None
    iv = None
    plaintext = None
    for line in vector_file:
        line = line.strip()
        if line.startswith("KEY"):
            if count != 0:
                output.append(
                    "CIPHERTEXT = {0}".format(
                        encrypt(mode, key, iv, plaintext)
                    )
                )
            output.append("\nCOUNT = {0}".format(count))
            count += 1
            name, key = line.split(" = ")
            output.append("KEY = {0}".format(key))
        elif line.startswith("IV"):
            name, iv = line.split(" = ")
            output.append("IV = {0}".format(iv))
        elif line.startswith("PLAINTEXT"):
            name, plaintext = line.split(" = ")
            output.append("PLAINTEXT = {0}".format(plaintext))

    output.append("CIPHERTEXT = {0}".format(encrypt(mode, key, iv, plaintext)))
    return "\n".join(output)


def write_file(data, filename):
    with open(filename, "w") as f:
        f.write(data)


OFB_PATH = "vectors/cryptography_vectors/ciphers/AES/OFB/OFBMMT128.rsp"
write_file(build_vectors(modes.OFB, OFB_PATH), "seed-ofb.txt")
CFB_PATH = "vectors/cryptography_vectors/ciphers/AES/CFB/CFB128MMT128.rsp"
write_file(build_vectors(modes.CFB, CFB_PATH), "seed-cfb.txt")

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