我正在尝试熟悉pycrypto模块,但缺乏清晰的文档使事情变得困难。
首先,我想了解签名和验证数据。有没有人能举个例子,说明这篇文章是怎么写的?
发布于 2010-11-20 21:14:10
这是example in the old PyCrypto documentation:的一个充实版本
确保您使用的是pycryptodome
而不是pycrypto
(未维护!)
pycryptodome可以与pip install pycryptodome
一起安装
import Crypto.Hash.MD5 as MD5
import Crypto.PublicKey.RSA as RSA
import Crypto.PublicKey.DSA as DSA
import Crypto.PublicKey.ElGamal as ElGamal
import Crypto.Util.number as CUN
import os
plaintext = 'The rain in Spain falls mainly on the Plain'
# Here is a hash of the message
hash = MD5.new(plaintext).digest()
print(repr(hash))
# '\xb1./J\xa883\x974\xa4\xac\x1e\x1b!\xc8\x11'
for alg in (RSA, DSA, ElGamal):
# Generates a fresh public/private key pair
key = alg.generate(384, os.urandom)
if alg == DSA:
K = CUN.getRandomNumber(128, os.urandom)
elif alg == ElGamal:
K = CUN.getPrime(128, os.urandom)
while CUN.GCD(K, key.p - 1) != 1:
print('K not relatively prime with {n}'.format(n=key.p - 1))
K = CUN.getPrime(128, os.urandom)
# print('GCD({K},{n})=1'.format(K=K,n=key.p-1))
else:
K = ''
# You sign the hash
signature = key.sign(hash, K)
print(len(signature), alg.__name__)
# (1, 'Crypto.PublicKey.RSA')
# (2, 'Crypto.PublicKey.DSA')
# (2, 'Crypto.PublicKey.ElGamal')
# You share pubkey with Friend
pubkey = key.publickey()
# You send message (plaintext) and signature to Friend.
# Friend knows how to compute hash.
# Friend verifies the message came from you this way:
assert pubkey.verify(hash, signature)
# A different hash should not pass the test.
assert not pubkey.verify(hash[:-1], signature)
https://stackoverflow.com/questions/4232389
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