
RSA 密码加密
在本章中,我们将重点关注 RSA 密码加密的不同实现和涉及的函数。你可以参考或包含此 python 文件来实现 RSA 密码算法的实现。
以下模块用于加密算法:
from Crypto.PublicKey import RSA from Crypto.Cipher import PKCS1_OAEP from Crypto.Signature import PKCS1_v1_5 from Crypto.Hash import SHA512, SHA384, SHA256, SHA, MD5 from Crypto import Random from base64 import b64encode, b64decode hash = "SHA-256"
由于安全性较好,我们将哈希值初始化为 SHA-256。我们将使用下列代码生成新密钥或一对公钥和私钥。
def newkeys(keysize): random_generator = Random.new().read key = RSA.generate(keysize, random_generator) private, public = key, key.publickey() return public, private def importKey(externKey): return RSA.importKey(externKey)
加密时,使用下列函数,其中遵循 RSA 算法:
def encrypt(message, pub_key): cipher = PKCS1_OAEP.new(pub_key) return cipher.encrypt(message)
两个参数是必须的:消息和公钥,公钥指公钥。公钥用于加密,私钥用于解密。
完整加密程序如下:
from Crypto.PublicKey import RSA from Crypto.Cipher import PKCS1_OAEP from Crypto.Signature import PKCS1_v1_5 from Crypto.Hash import SHA512, SHA384, SHA256, SHA, MD5 from Crypto import Random from base64 import b64encode, b64decode hash = "SHA-256" def newkeys(keysize): random_generator = Random.new().read key = RSA.generate(keysize, random_generator) private, public = key, key.publickey() return public, private def importKey(externKey): return RSA.importKey(externKey) def getpublickey(priv_key): return priv_key.publickey() def encrypt(message, pub_key): cipher = PKCS1_OAEP.new(pub_key) return cipher.encrypt(message)
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