M2Crypto RSA加密、解密的实例介绍

# 环境centos7.0，提前装好openssl（自行百度安装），windows装不上，暂不考虑了

[root@localhost ~]# pip install m2crypto

# 验证

>>> import M2Crypto

>>>

# centos系统上执行以下命令生成公钥和私钥

[root@localhost ~]# openssl genrsa -out key.pem 1024

[root@localhost ~]# openssl rsa -in key.pem -pubout -out pubkey.pem

import M2Crypto

import json

# 私钥加密

def pri_encrypt(msg, file_name):

    rsa_pri = M2Crypto.RSA.load_key(file_name)          # 导入秘钥 <M2Crypto.RSA.RSA instance at 0x24da8c0>

    ctxt_pri = rsa_pri.private_encrypt(msg, M2Crypto.RSA.pkcs1_padding)   # 这里的方法选择加密填充方式，所以在解密的时候 要对应。

    print(ctxt_pri,type(ctxt_pri))

    ctxt64_pri = ctxt_pri.encode('base64')  # 密文是base64 只能写base64  方便保存 encode成str

    print ('密文:%s'% ctxt64_pri,type(ctxt64_pri))

    return ctxt64_pri

prikey_file = 'key.pem'

data = {'name':'Jefrey'}

message = json.dumps(data)

pri_encrypt(message,prikey_file)

# 打印

# ("\x8e\xc8 \x98\xea\xd5%&\xe3\xfa\xa5\xbbu];zZ\xf0\xc1\xdd\xf3\x8f\xaa\xdc\xfa\xbc\xacg\xfd\x0b3\xbba\x94K\x91ta\xda

# \xdf\xd05\xecV\xb1\xff\xf0\xc4\x07\xbf\x1c\xe0\xfc\x84&\xfcp\xf5\\\xab\xd8\xf2#\xfc\xce:]\xbae]W47\xf7\xc9\x9aXt\xff\

# xe9\xda\x19\x82\xecDP\xb2\xcb\xd3\x8d@\x81F'\x9f}\xfb\x8b\xb1o>\x91\xf0G\xc36\x19Q\xf8\x7f\xaf\xbe\xa2\xee\xf0V\x88\

# xbd[\x1e3\xaf\xf0\xd3\xebu\xa9", <type 'str'>)

# ('\xe5\xaf\x86\xe6\x96\x87:jsggmOrVJSbj+qW7dV07elrwwd3zj6rc+rysZ/0LM7thlEuRdGHaIN/QNexWsf/wxAe/HOD8hCb8\ncPVcq9jyI/zO

# Ol26ZV1XNDf3yZpYdP/p2hmC7ERQssvTjUCBRiefffuLsW8+kfBHwzYZUfh/r76i\n7vBWiL1bHjOv8NPrdak=\n', <type 'str'>)

import M2Crypto

import json

# 私钥加密

def pri_encrypt(msg, file_name):

    rsa_pri = M2Crypto.RSA.load_key(file_name)          # 导入秘钥

    ctxt_pri = rsa_pri.private_encrypt(msg, M2Crypto.RSA.pkcs1_padding)   # 进行加密 pkcs1_padding加密填充方式，解密的时候要对应。

    ctxt64_pri = ctxt_pri.encode('base64')        # 密文是base64 只能写base64  方便保存 encode成str

    print ('密文:%s'% ctxt64_pri,type(ctxt64_pri))

    return ctxt64_pri

# 公钥解密传入文件路径

def pub_decrypt(msg, file_name):

    rsa_pub = M2Crypto.RSA.load_pub_key(file_name)

    ctxt_pri = msg.decode("base64")     # 先将str转成base64

    maxlength = 128                      # 128位

    output = ''

    while ctxt_pri:

        input = ctxt_pri[:128]

        ctxt_pri = ctxt_pri[128:]

        out = rsa_pub.public_decrypt(input, M2Crypto.RSA.pkcs1_padding) #解密

        output = output + out

    print('明文:%s'% output,type(output))

    print('Json:%s'% json.loads(output),type(json.loads(output)))

prikey_file = 'key.pem'

pubkey_file = 'pubkey.pem'

data = {'name':'Jefrey'}

message = json.dumps(data)

primsg = pri_encrypt(message,prikey_file)

pub_decrypt(primsg,pubkey_file)

# 打印

# ('\xe6\x98\x8e\xe6\x96\x87:{"name": "Jefrey"}', <type 'str'>)

# ("Json:{u'name': u'Jefrey'}", <type 'dict'>)

import M2Crypto

import json

# 私钥加密

def pri_encrypt(msg, file_name):

    rsa_pri = M2Crypto.RSA.load_key(file_name)          # 导入秘钥

    ctxt_pri = rsa_pri.private_encrypt(msg, M2Crypto.RSA.pkcs1_padding)   # 进行加密 pkcs1_padding加密填充方式，解密的时候要对应。

    ctxt64_pri = ctxt_pri.encode('base64')        # 密文是base64 只能写base64  方便保存 encode成str

    # print ('密文:%s'% ctxt64_pri,type(ctxt64_pri))

    return ctxt64_pri

# 公钥解密传入字符串

def pub_decrypt(msg, pub_key):

    bio = M2Crypto.BIO.MemoryBuffer(pub_key)

    rsa_pub = M2Crypto.RSA.load_pub_key_bio(bio)

    ctxt_pri = msg.decode("base64")     # 先将str转成base64

    output = rsa_pub.public_decrypt(ctxt_pri, M2Crypto.RSA.pkcs1_padding) #解密

    print('明文:%s'% output,type(output))

    print('Json:%s'% json.loads(output),type(json.loads(output)))

prikey_file = 'key.pem'

pubkey_file = 'pubkey.pem'

data = {'name':'Jefrey'}

message = json.dumps(data)

primsg = pri_encrypt(message,prikey_file)

with open(pubkey_file,'r+') as f:

    pub_key = f.read()

pub_decrypt(primsg,pub_key)

# 打印

# ('\xe6\x98\x8e\xe6\x96\x87:{"name": "Jefrey"}', <type 'str'>)

# ("Json:{u'name': u'Jefrey'}", <type 'dict'>)