python rsa和Crypto.PublicKey.RSA 模块详解

Crypto.PublicKey.RSA

生成公私钥

private.pem

public.pem

读取公私钥

验证

使用公私钥加解密

SHA256签名

rsa

生成公私钥

private.pem

public.pem

读取公私钥

验证

使用公私钥加解密

SHA256签名

rsa基础 https://www.jb51.net/article/245430.htm

Crypto.PublicKey.RSA 生成公私钥

import Crypto.PublicKey.RSA
x = Crypto.PublicKey.RSA.generate(1024)
private = x.exportKey("PEM")  # 生成私钥
public = x.publickey().exportKey()   # 生成公钥
with open("private.pem", "wb") as x:
    x.write(private)
with open("public.pem", "wb") as x:
    x.write(public)

生成的密钥结果

private.pem

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

public.pem

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCcIy+CGb9lIkimJEwKXtRqAjCI
AngiXZchKlnIAQBnAbI6VKQzJtkrak2MQXVy9eN7tj97fTHCjRCxdRNP1VaROGjn
VPkOEbGHhvNc/BjW0x017B4p93ncw8mbSM3f/+lzIVkdr9EA6iEOajh+hjehc6NM
5Al6HESniQ0gnhroSQIDAQAB
-----END PUBLIC KEY-----

读取公私钥

公钥（n，e) 私钥（n，d)

import Crypto.PublicKey.RSA
with open("public.pem", 'rb') as x:
    public_key = Crypto.PublicKey.RSA.importKey(x.read())
    print(public_key.n)
    print(public_key.e)
with open("private.pem", 'rb') as x:
    private_key = Crypto.PublicKey.RSA.importKey(x.read())
    print(private_key.n)
    print(private_key.d)

验证

from Crypto.Util.number import bytes_to_long, long_to_bytes
c = bytes_to_long(b'xiaoxiaoran')  # 145568744200917766156476782
e = 65537
n = 109643441631386007615207297424331621014870648392454190718008050275074314522481791638636510984908444997607601077178481245842175926260005040415391800640503546886684365699706581166859202247619266556089792006189825410067873631530196098659194702332240479537964725096088707413180064673445928734211470673853181257801
d = 50615797257072614971608239314043075331406747818629252377709912828588977962378890781255295811418169113327115473541607959661444856509045615381349027762609120393751592942681652318623050975912426954942311074907668935122731656262294557574124857501289932634444295689852337987042610580415469287093874225498684658587
m = 4760371267684579630308571621455961776995122884329127227626895682331686504102393602160541535737343533151346614474308194637699485212151592440962407908438970696018720824027009690388552784020837086483711342994294618339728483898311036392512162634521480659231411043537783938261406684265246639310985133668266244632
m = pow(c, d, n)  # m = c^d mod n
c = pow(m, e, n)  # c = m^e mod n
# print(m)  # 密文
print(long_to_bytes(c))

使用公私钥加解密

import Crypto.PublicKey.RSA
import Crypto.Cipher.PKCS1_v1_5
import Crypto.Random
str = b"xiaoxiaoran"
with open("./public.pem", "rb") as x:
    cipher_public = Crypto.Cipher.PKCS1_v1_5.new(Crypto.PublicKey.RSA.importKey(x.read()))
    cipher_text = cipher_public.encrypt(str)  # 使用公钥进行加密
with open("./private.pem", "rb") as x:
    cipher_private = Crypto.Cipher.PKCS1_v1_5.new(Crypto.PublicKey.RSA.importKey(x.read()))
    text = cipher_private.decrypt(cipher_text, Crypto.Random.new().read)    # 使用私钥进行解密
print(text)

SHA256签名

import Crypto.Hash
import Crypto.Signature.PKCS1_v1_5
import Crypto.PublicKey.RSA
str = b"xiaoxiaoran"
with open("./private.pem", "rb") as x:
    c_rsa = Crypto.PublicKey.RSA.importKey(x.read())
    signer = Crypto.Signature.PKCS1_v1_5.new(c_rsa)
    msg_hash = Crypto.Hash.SHA256.new()
    msg_hash.update(str)
    sign = signer.sign(msg_hash)    # 使用私钥进行'sha256'签名
    # print(sign)
with open("./public.pem", "rb") as x:
    d_rsa = Crypto.PublicKey.RSA.importKey(x.read())
    verifer = Crypto.Signature.PKCS1_v1_5.new(d_rsa)
    verify = verifer.verify(msg_hash, sign)  # 使用公钥验证签名
    print(verify)

rsa 生成公私钥

import rsa
public, private = rsa.newkeys(1024)    # 生成公钥、私钥
with open("./private.pem", "wb") as x:  # 保存私钥
    x.write(private.save_pkcs1())
with open("./public.pem", "wb") as x:  # 保存公钥
    x.write(public.save_pkcs1())