AES加解密

AES 只是个基本算法，实现 AES 有几种模式，主要有 ECB、CBC、CFB 和 OFB CTR，直接上代码，此处为AES加密中的CBC模式，EBC模式与CBC模式相比，不需要iv。

import base64from Crypto.Cipher import AESfrom binascii import b2a_hex, a2b_hexunpad = lambda s: s[:-ord(s[len(s) - 1:])]class AES3: def __init__(self, key): self.key = key self.mode = AES.MODE_CBC self.iv = self.key def _pad(self, text): key_len = len(self.key) pad = text + (key_len - len(text) % key_len) * chr(key_len - len(text) % key_len) return pad def _unpad(self, text): pad = ord(text[-1:]) return text[0:-pad] # 加密函数 def encrypt(self, text): length = 16 count = len(text) if count % length != 0: add = length - (count % length) else: add = 0 text = text + ('\0' * add) cryptor = AES.new(self.key.encode("utf8"), self.mode, self.iv.encode("utf8")) self.ciphertext = cryptor.encrypt(bytes(text, encoding="utf8")) # AES加密时候得到的字符串不一定是ascii字符集的，输出到终端或者保存时候可能存在问题，使用base64编码 return base64.b64encode(b2a_hex(self.ciphertext)).decode('utf-8') # 解密函数 def decrypt(self, text): decode = base64.b64decode(text) cryptor = AES.new(self.key.encode("utf8"), self.mode, self.iv.encode("utf8")) plain_text = unpad(cryptor.decrypt(decode)) return a2b_hex(plain_text) .decode('utf8')

RSA公钥加密，私钥解密

from Crypto.PublicKey import RSAfrom Crypto.Cipher import PKCS1_v1_5 as Cipher_pkcs1_v1_5from Crypto.Signature import PKCS1_v1_5 as Signature_pkcs1_v1_5import base64# 私钥private_key = '''-----BEGIN RSA PRIVATE KEY-----5353dfggd-----END RSA PRIVATE KEY-----'''# 公钥public_key = '''-----BEGIN PUBLIC KEY-----hfgghftetet-----END PUBLIC KEY-----'''def rsa_encrypt(message): """校验RSA加密 使用公钥进行加密""" cipher = Cipher_pkcs1_v1_5.new(RSA.importKey(public_key)) cipher_text = base64.b64encode(cipher.encrypt(message.encode())).decode() return cipher_textdef rsa_decrypt(text): """校验RSA加密 使用私钥进行解密""" cipher = Cipher_pkcs1_v1_5.new(RSA.importKey(private_key)) retval = cipher.decrypt(base64.b64decode(text), 'ERROR').decode('utf-8') return retval

DES加解密

from pyDes import *import base64class Des3(object): def __init__(self, key, iv): # 这里密钥key长度必须为16/24, ,偏移量ivs self.key = key self.mode = CBC self.iv = iv # 加密函数，如果text不是16的倍数【加密文本text必须为16的倍数！】，那就补足为16的倍数 def encrypt(self, text): des3 = triple_des(self.key, self.mode, self.iv, pad=None, padmode=PAD_PKCS5) data = des3.encrypt(text) data = base64.b64encode(data) return data.decode('utf-8') # 解密后，去掉补足的空格用strip() 去掉 def decrypt(self, data): des3 = triple_des(self.key, self.mode, self.iv, pad=None, padmode=PAD_PKCS5) data = base64.b64decode(data) text = des3.decrypt(data) return text.decode('hex')

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