python 中的pycrypto 算法加密

pip install pycryto

from Crypto.Cipher import AES
# 加密
aes = AES.new('this is a key 11', AES.MODE_CBC, 'this is a iv 222')
string = 'autofelix is god'
# encrypt()方法要求被加密的字符串必须也是16、24或32位的长度；所以一般要对被加密串进行处理
result = aes.encrypt(string)
# 解密
aes.decrypt(result)

from Crypto.Hash import SHA256
hash = SHA256.new()
hash.update('Hello, World!')
# 使用digest()方法加密
digest = hash.digest()
# 使用hexdigest（）方法加密，该方法加密后是16进制的
hexdigest = hash.hexdigest()
print(digest, hexdigest)

from Crypto import Random
from Crypto.PublicKey import RSA
# 获取一个伪随机数生成器
random_generator = Random.new().read
# 获取一个rsa算法对应的密钥对生成器实例
rsa = RSA.generate(1024, random_generator)
# 生成私钥并保存
private_pem = rsa.exportKey()
with open('rsa.key', 'w') as f:
f.write(private_pem)
# 生成公钥并保存
public_pem = rsa.publickey().exportKey()
with open('rsa.pub', 'w') as f:
f.write(public_pem)
# 私钥 rsa.key 结果大概如下
# -----BEGIN RSA PRIVATE KEY-----
# MIICXQIBAAKBgQDR4Wq9l44lw/thTPyFmSi2hII92EPh90yGXQNL5e7zJPD16j6Q
# # tr+tIPNSQaVrnmNwrtqyEC2x4Meyp3tdCWPYUF11r2GgDgxKfUByetNG4XqJeUKk
# kJ6D6C706mTf/2zsm8KFoNYCYPX1GhvpiTOikHcNlHLCnOD7jbMAovJg/QIDAQAB
# AoGBAIz8V6+0NxC3bg4WoSs9j1PL/5F7zV3lucoogSZi9vjuP89x40Vi/a9XCxye
# bHi2lSYEz3P92jQ7QuqIBx6gSCi3p2HLjD5LyQeSSMbPe8KSlf52dBUaPthbBceA
# IJSBDrE8MKGpulTQKAJ7K3zQUOP2ZZgcKxq2jcQgS6iTENIBAkEA5r7emvwuL0Ob
# Maav4o1Ovb5c6OL7bSm1tuLPSKl05WuNYfE6LkqiwOOn5lPvsqhwyI1dJeywVeQz
# E+PvcTUR7QJBAOjZ8PxnP5T14fuhbfko4d24Ev+iiTBdq3pMXWvobEFL1ljV6aYE
# 2JAiMjO/Fzd1WgZhWPa3P+diyTs9mART6VECQQC0LeEXdsn9oDYEbFu1dZBB++8C
# 75NTJ5m8iJlB7QjZyMUq8Ln0wdUa9+n4ohxvDraa9EADSDJdr4bvBjLH3J/1AkBr
# 9QfO7kvDU5DXqoujVnoJ4xsj3IbAnt0vEZLKwfLW/0M84si2SU7i3IfsB+/KraT0
# ilPF50ZAkEN+LNt7PjBRAkAHBBPME7IbFqxi5Cc/6R12DOMiJbOLDTS12b1J1cwG
# p8WMIERsvwWdJw+4NdqjbJcjzeGrXhDBi//JU902TAwy
# -----END RSA PRIVATE KEY-----
# 公钥 rsa.pub 结果大概如下
# -----BEGIN PUBLIC KEY-----
# # MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDR4Wq9l44lw/thTPyFmSi2hII9
# 2EPh90yGXQNL5e7zJPD16j6Qtr+tIPNSQaVrnmNwrtqyEC2x4Meyp3tdCWPYUF11
# r2GgDgxKfUByetNG4XqJeUKkkJ6D6C706mTf/2zsm8KFoNYCYPX1GhvpiTOikHcN
# lHLCnOD7jbMAovJg/QIDAQAB
# -----END PUBLIC KEY-----

import cgi, base64
from Crypto.PublicKey import RSA
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
import hashlib
# 要加密的字符串
message = 'autofelix is god'
# 使用公钥对内容进行 rsa 加密
with open('rsa.pub') as f:
key = f.read()
rsakey = RSA.importKey(key)
cipher = Cipher_pkcs1_v1_5.new(rsakey)
cipher_text = base64.b64encode(cipher.encrypt(message))
print(cipher_text)
# 使用私钥对内容进行 rsa 解密
with open('rsa.key') as f:
key = f.read()
rsakey = RSA.importKey(key)
cipher = Cipher_pkcs1_v1_5.new(rsakey)
text = cipher.decrypt(base64.b64decode(encrypt_text), random_generator)
print(text)

import datetime, random
import requests
import hashlib
import json, base64
from Crypto.PublicKey import RSA
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
from Crypto.Cipher import AES
# 加签
def sign(signflag,keypath,baseRequest):
# http请求body
print(baseRequest)
# 加签标志
if not signflag:
return baseRequest
else:
# 取请求体中的业务数据
businessdata = json.dumps(baseRequest["data"])
# 读取私钥（.key格式，可使用openssl或java.keytools产生）
with open(keypath,'r') as rsaKeyFile:
rsaKey = rsaKeyFile.read().replace("\n",'')
print(rsaKey)
rsaKeyBytes = base64.b64decode(rsaKey)
print(rsaKeyBytes)
# SHA256摘要，RSA加密
priKey = RSA.importKey(rsaKeyBytes)
signer = PKCS1_v1_5.new(priKey)
hash_obj = SHA256.new(business_data.encode('utf-8'))
signature = base64.b64encode(signer.sign(hash_obj))
print(signature)
# 把签名加进请求体并返回
baseRequest['sign'] = signature.decode()
print(baseRequest)
return baseRequest
# 验签
def validata(signflag,cerpath,res):
if not signflag:
return res
else:
# 取业务数据和签名
data = res['data']
sign = res['sign']
# 此处cer已转换成pem格式，使用openssl工具
# openssl x509 -inform der -pubkey -noout -in xxxxx.cer>xxxxx.pem
cert = open(cerpath).read().replace("-----BEGIN PUBLIC KEY-----\n","").replace("-----END PUBLIC KEY-----\n","").replace("\n","")
print(cert)
# 验签逻辑同加签
pubBytes = base64.b64decode(cert)
pubKey = RSA.importKey(pubBytes)
signer = SHA256.new(json.dumps(data).encode("utf-8"))
verifier = PKCS1_v1_5.new(pubKey)
return verifier.verify(signer,base64.b64decode(sign))