目录
- 一:crypto库安装
- 二:python使用crypto
- 1:crypto的加密解密组件des.py编程
- 2:crypto组件使用
- 知识补充
一:crypto库安装
pycrypto,pycryptodome是crypto第三方库,pycrypto已经停止更新三年了,所以不建议安装这个库;pycryptodome是pycrypto的延伸版本,用法和pycrypto 是一模一样的;所以只需要安装pycryptodome就可以了
pip install pycryptodome
二:python使用crypto
1:crypto的加密解密组件des.py
#!/usr/bin/env python # -*- coding: utf-8 -*- php from Crypto.Cipher import DES from binascii import b2a_hex, a2b_hex class MyDESCrypt: #自己php实现的DES加密类 def __init__(self, key = ''): #密钥长度必须为64位,也就是8个字节 if key is not '': self.key = key.encode('utf-8') else: self.key = '12345678'.encode('utf-8') self.mode = DES.MODE_CBC # 加密函数,如果text不足16位就用空格补足为16位, # 如果大于16当时不是16的倍数,那就补足为16的倍数。 def encrypt(selfjavascript,text): try: text = text.encode('utf-8') cryptor = DES.new(self.key, self.mode, self.key) # 这里密钥key 长度必须为16(DES-128), # 24(DES-192),或者32 (DES-256)Bytes 长度 # 目前DES-128 足够目前使用 length = 16 #lenth可以设置为8的倍数 count = len(text) if count < length: add = (length - count) # \0 backspace # text = text + ('\0' * add) text = text + ('\0' * add).encode('utf-8') elif count > length: add = (length - (count % length)) # text = text + ('\0' * add) text = text + ('\0' * add).encode('utf-8') self.ciphertext = cryptor.encrypt(text) # 因为DES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 # 所以这里统一把加密后的字符串转化为16进制字符串 re开发者_JS开发turn b2a_hex(self.ciphertext) except: return "" # 解密后,去掉补足的空格用strip() 去掉 def decrypt(self, text): try: cryptor = DES.new(self.key, self.mode, self.key) plain_text = cryptor.decrypt(a2b_hex(text)) # return plain_text.rstrip('\0') return bytes.decode(plain_text).rstrip('\0') except: return ""
2:crypto组件使用
from . import des msg = "password is 961223" key = "12345678" #key值可传可不传 des1 = des.MyDESCrypt() #加密 cipherTxt = des1.encrypt(msg) #返回值为bytes型 print(cipherTxt) #解密 decTxt = des1.decrypt(cipherTxt); #返回值为str型 print(decTxt)
知识补充
下面是小编为大家整理的一些Python利用pycrypto进行加密解密的示例,希望对大家有所帮助
AES-ECB加解密
下面是采用 ECB
并以pkcs7
填充的加密与解密方法
import base64 from Crypto.Cipher import AES from Crypto.Util.Padding import pad, unpad def aes_encrypt(secret_key, data): """加密数据 :param secret_key: 加密秘钥 :param data: 需要加密数据 """ data = bytes(data, encoding="utf-8") # 填充数据采用pkcs7 data = pad(data, block_size=16, style="pkcs7") # 创建加密器 cipher = AES.new(key=secret_key.encode("utf-8"), mode=AES.MODE_ECB) # 对数据进行加密 encrypted_data = cipher.encrypt(data) # 对数据进行base64编码 encrypted_data = base64.b64encode(encrypted_data) return encrypted_data.decode() def aes_decrypt(secret_key, data): """解密数据 """ data = base64.b64decode(data) cipher = AES.new(key=secret_key.encode("utf-8"), mode=AES.MODE_ECB) decrypt_data = cipher.decrypt(data) decrypt_data = unpad(decrypt_data, 16, style="pkcs7") return decrypt_data.decode("utf-8") if __name__ == '__main__': key = "22a1d4c4263e83d7f8c33a321eb19ae7" data = "asdASD73j8H9k6C1asvhBOK0PXOzJM7dsqXysssW" print("原始数据:%s" % data) r = aes_encrypt(key, data) print("加密数据:%s" % r) r = aes_decrypt("22a1d4c4263e83d7f8c33a321eb19ae7", r) print("解密数据:%s" % r)
执行结果如下
AES-GCM加解密
import base64 import random import string from Crypto.Cipher import AES def encrypt_aes_gcm(key, data, associated_data=None, nonce=None): """ AES-GCM加密 :param key: 密钥。16, 24 or 32字符长度的字符串 :param data: 待加密字符串 :param associated_data: 附加数据,一般为None :param nonce: 随机值,和MD5的“加盐”有些类似,目的是防止同样的明文块,始终加密成同样的密文块 :return: """ key = key.encode('utf-8') data = data.encode('utf-8') # 假如先后端约定随机值为16位长度的字符串 nonce = nonce or "1234567812345678" nonce = nonce.encode("utf-8") # 生成加密器 cipher = AES.new(key, AES.MODE_GCM, nonce=nonce) if associated_data is not None: cipher.update(associated_data.encode()) # 加密数据 cipher_data, auth_tag = cipher.encrypt_and_digest(data) # 拼接数据 join_data = nonce + cipher_data + auth_tag # 拼接数据为:前16位为nonce,后16位为验签值 # 返回base64编码数据 return base64.b64encode(join_data).decode('utf-8') def decrypt_aes_gcm(key, cipher_data, associated_data=None): """ AES-GCM解密 :param cipher_data: encrypt_aes_gcm 方法返回的数据 :return: """ key = key.encode('utf-8') # 进行base64解码 debase64_cipher_data = base64.b64decode(cipher_data) # 分割数据 nonce = debase64_cipher_data[:16] cipher_data = debase64_cipher_data[16:-16] auth_tag = debase64_cipher_data[-16:] cipher = AES.new(key, AES.MODE_GCM, nonce=nonce) if associated_data is not None: cipher.update(associated_data.encode()) # 解密数据 plaintext = cipher.decrypt_and_verify(cipher_data, auth_tag) return plaintext.decode() if __name__ == '__main__': aes_key = 'DnKRYZbvVzdhPlF10rtcxmi5Cj36AbCd' associated_data = "1234567812345678" nonce = ''.join(random.sample(string.ascii_letters + string.digits, 16)) data = '{"lang":"zh-CN","pageNumber":1,"pageSize":10,"cycleId":"1522973936269266945"}' print("原始数据:" + data) cipher_data = encrypt_aes_gcm(aes_key, data, associated_data=associated_data, nonce=nonce编程客栈) print("加密数据:" + cipher_data) de_data = decrypt_aes_gcm(aes_key, cipher_data, associated_data) print("解密数据:" + de_data)
执行结果如下:
使用RAS实现非对称加解密
# -*- coding: utf-8 -*- from Crypto import Random from Crypto.PublicKey import RSA from Crypto.Cipher import PKCS1_v1_5 import base64 def get_key(): """生成公私钥""" # 生成rsa算法实例 rsa = RSA.generate(1024, Random.new().read) # 生成公钥私钥 private_pem = rsa.exportKey() public_pem = rsa.publickey().exportKey() return { "public_key": public_pem.decode(), "private_key": private_pem.decode() } def rsa_encrypt(data, public_key): """公钥加密""" # 加载公钥 rsakey = RSA.importKey(public_key) # 生成密码器 cipher = PKCS1_v1_5.new(rsakey) # 加密数据。注意,在python3中加密的数据必须是bytes类型的数据,不能是str类型的数据 encrypt_data = cipher.encrypt(data.encode(encoding="utf-8")) # # 对数据进行base64编码 encrypt_data = base64.b64encode(encrypt_data) # 公钥每次加密的结果不一样。原因是每次padding的数据不一样 return encrypt_data.decode() def rsa_decrypt(cipher_data, private_key): """私钥解密""" # 加载私钥 rsakey = RSA.importKey(private_key) # 生成密码器 cipher = PKCS1_v1_5.new(rsakey) # 将密文解密成明文,返回的是一个bytes类型数据,需要自己转换成str decrypt_data = cipher.decrypt(base64.b64decode(cipher_data), "解密失败") return decrypt_data.decode() if __name__ == '__main__': # k = get_key() # public_key = k.get("public_key") # private_key = k.get("private_key") # # print(public_key) # print(private_key) public_key = """-----BEGIN PUBLIC KEY----- MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDKF7UTc5K61xMUKrCtld0dYJf/ KjT5P+R3H8n8my8aEYqUaWQjO3CkQGsLN//5Tbs8g5Of4vAkqytoleWxSQxFGO7T YuOQ7UtvRhKqTKvX8PvDnKX7ebKzw3zIXt1QDRbc2bJTqVAbPDdT1DNvyocQdCMC BtPA2algMRs4Zq0qpwIDAQAB -----END PUBLIC KEY----- """ private_key = """-----BEGIN RSA PRIVATE KEY----- MIICWwIBAAKBgQDKF7UTc5K61xMUKrCtld0dYJf/KjT5P+R3H8n8my8aEYqUaWQj O3CkQGsLN//5Tbs8g5Of4vAkqytoleWxSQxFGO7TYuOQ7UtvRhKqTKvX8PvDnKX7 ebKzw3zIXt1QDRbc2bJTqVAbPDdT1DNvyocQdCMCBtPA2algMRs4Zq0qpwIDAQAB AoGAE3LSn0uZDFgUYvV0yU/J1sDr/8dtD6uhbgFmK+Q3VTfo8T1vQKDAx13Xr121 SaW8Zid3DOSdfbnnVIpQb45LGtM5GLLDEslSBVJ/u2pNaUF/JmwK+PZVe02g2zCX rtmceROdOQZo66Iq3jlV3PWcuZdTr1n6XLgbXNyMyeQHf7ECQQDNfJN/ifeXZIk6 ouqWMGdlW6kFTCHXBGeSETqG5otfJWyvGDPOpN+950VXEObcU5y+yyGMX9CEyMNX B65U/nY5AkEA+8WLBoz2orSptQTB8aDsBfy7rzOnqC7cPepSzsu5oIkNxe1ZJC3j p0m/0UYpKOgb6RWGi4MhtdfYubMpRQ2n3wJACPoLO4Qcc9mpgQ1C8EK3EZ96d8fG pq0DlUb5ZpFFv2dUIyYMhVeAirxCtDYBz9g7Pb6D/azl4BchKXklbYMcSQJAViwr xGc090V8nG9vbiNVBUuWdYXpiV/Yk/yCsTL7at3d7/OnwgFO3PAaDifEaLLg8qsi bNfKDvI8xHp00qS04wJAeNJg/6C4Xwo1GYeAg2HIy0yHIQ9gs1hwA5zXdUc/7t+9 UkZj7rd2ySQJmXsO2LU0/SvmLIjiNoG3frjWS+dqLA== -----END RSA PRIVATE KEY----- """ data = "hello python!" cipher_data = rsa_encrypt(data, public_key) print(cipher_data) decrypt_data = rsa_decrypt(cipher_data, private_key) print(decrypt_data)
执行结果如下
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