运行环境
python 3.4
pycryptodome 3.6.6
代码
#!/usr/bin/env python
# -*- coding=utf-8 -*-
"""
RSA加密
Key长度2048
"""
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5
import base64
def handle_pub_key(key):
"""
处理公钥
公钥格式pem，处理成以-----BEGIN PUBLIC KEY-----开头，-----END PUBLIC KEY-----结尾的格式
:param key:pem格式的公钥，无-----BEGIN PUBLIC KEY-----开头，-----END PUBLIC KEY-----结尾
:return:
"""
start = '-----BEGIN PUBLIC KEY-----\n'
end = '-----END PUBLIC KEY-----'
result = ''
# 分割key，每64位长度换一行
divide = int(len(key) / 64)
divide = divide if (divide > 0) else divide+1
line = divide if (len(key) % 64 == 0) else divide+1
for i in range(line):
result += key[i*64:(i+1)*64] + '\n'
result = start + result + end
return result
def encrypt(key, content):
"""
ras 加密[公钥加密]
:param key: 无BEGIN PUBLIC KEY头END PUBLIC KEY尾的pem格式key
:param content:待加密内容
:return:
"""
pub_key = handle_pub_key(key)
pub = RSA.import_key(pub_key)
cipher = PKCS1_v1_5.new(pub)
encrypt_bytes = cipher.encrypt(content.encode(encoding='utf-8'))
result = base64.b64encode(encrypt_bytes)
result = str(result, encoding='utf-8')
return result
