python中的RSA加密与解密实例解析

pip install pycrypto

from Crypto import Random
from Crypto.Hash import SHA
from Crypto.Cipher import PKCS1_v1_5 as Cipher_pkcs1_v1_5
from Crypto.Signature import PKCS1_v1_5 as Signature_pkcs1_v1_5
from Crypto.PublicKey import RSA
 
# 伪随机数生成器
random_generator = Random.new().read
# rsa算法生成实例
rsa = RSA.generate(1024, random_generator)
 
# Server的秘钥对的生成
private_pem = rsa.exportKey()
with open("server-private.pem", "w") as f:
 f.write(private_pem)
 
public_pem = rsa.publickey().exportKey()
with open("server-public.pem", "w") as f:
 f.write(public_pem)
 
# Client的秘钥对的生成
private_pem = rsa.exportKey()
with open("client-private.pem", "w") as f:
 f.write(private_pem)
 
public_pem = rsa.publickey().exportKey()
with open("client-public.pem", "w") as f:
 f.write(public_pem)

-----BEGIN RSA PRIVATE KEY-----
MIICXQIBAAKBgQC26X6A0WCWiVxdxq3jtm42yDdGbf+99v2zyi0UMVGZfowlnkcW
eMvpz8NBm2UVlrjZpnFr8wFkdHyjFFkq/ilclH3AN4+Xw8Ap7CGJ2jVMyS5h9RRB
Uyf3F4D5Og8789Ywh9HXYyvD/6J62EtbbkhGPxg3aa8n2kfKZ9N6Q7DqrwIDAQAB
AoGBAJn5qu1D1FxE24Vxl7ZGPzdMigN227+NaPptak9CSR++gLm2KL+JBpcXt5XF
+20WCRvnWjl2QijPSpB5s6pWdHezEa1cl6WrqB1jDJd1U99WNCL5+nfEVD9IF+uE
ig0pnj+wAT5fu78Z0UjxD9307f9S7BLC8ou3dWVkIqob6W95AkEAuPGTNlTkquu/
wBJTb4/+/2ZCf7Ci9qvsN3+RcrzFkKa3uTtBOa6Xk2R61zBkucUgY6cQHPbxhFLN
TVmXdbwxTQJBAP0wGenVOq4dCPdz3NhyghkKT6SL2w/SgbrROiJ1mG9MoBq58/0g
k85I91R7nuvOYTKTUkhWdPYITpDarmPJzesCQGRBmOMgHCHH0NfHV3Gn5rz+61eb
IoyD4Hapceh4CsWCiyAfzhj9229sTecvdbr68Lb0zphVCdIIrQCca63IShUCQGYI
e3jzmHlQdCudArQruWgz8pKiVf7TW7qY1O/MKkk4PRFoPP6WoVoxp5LhWtM20Y7b
Nf628N2xzU+tAThvvE8CQQCI1C7GO3I5EMfqPbTSq2oZq8thvGlyFyI7SNNuvAHj
hj2+0217B9CcTZqloYln01CNDVuaoUgEvFSw1OdRB1tC
-----END RSA PRIVATE KEY-----
 
-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC26X6A0WCWiVxdxq3jtm42yDdG
bf+99v2zyi0UMVGZfowlnkcWeMvpz8NBm2UVlrjZpnFr8wFkdHyjFFkq/ilclH3A
N4+Xw8Ap7CGJ2jVMyS5h9RRBUyf3F4D5Og8789Ywh9HXYyvD/6J62EtbbkhGPxg3
aa8n2kfKZ9N6Q7DqrwIDAQAB
-----END PUBLIC KEY-----

# Server使用Client的公钥对内容进行rsa 加密
 
message = "hello client, this is a message"
with open("client-public.pem") as f:
  key = f.read()
  rsakey = RSA.importKey(key)
  cipher = Cipher_pkcs1_v1_5.new(rsakey)
  cipher_text = base64.b64encode(cipher.encrypt(message.encode('utf-8')))
  print(cipher_text.decode('utf-8'))
 
#加密结果：
HYQPGB+axWCbPp7PPGNTJEAhVPW0TX5ftvUN2v40ChBLB1pS+PVM3YGT5vfcsvmPZhW8NKVSBp8FwjLUnMn6yXP1O36NaunUzyHwI+cpjlkTwZs3DfCY/32EzeuKuJABin1FHBYUMTOKtHy+eEDOuaJTnZTC7ZBkdha+J88HXSc=

# Client使用自己的私钥对内容进行rsa 解密
 
with open("client-private.pem") as f:
  key = f.read()
  rsakey = RSA.importKey(key)
  cipher = Cipher_pkcs1_v1_5.new(rsakey)
  text = cipher.decrypt(base64.b64decode(encrypt_text), random_generator)
  print(text.decode('utf-8'))
 
#解密结果：
hello client, this is a message

# Server使用自己的私钥对内容进行签名
 with open("server-private.pem") as f:
  key = f.read()
  rsakey = RSA.importKey(key)
  signer = Signature_pkcs1_v1_5.new(rsakey)
  digest = SHA.new()
  digest.update(message)
  sign = signer.sign(digest)
  signature = base64.b64encode(sign)
  print signature
 
#签名结果：
jVUcAYfgF5Pwlpgrct3IlCX7KezWqNI5tD5OIFTrfCOQgfyCrOkN+/gRLsMiSDOHhFPj2LnfY4Cr5u4eG2IiH8+uSF5z4gUX48AqCQlqiOTLk2EGvyp+w+iYo2Bso1MUi424Ebkx7SnuJwLiPqNzIBLfEZLA3ov69aDArh6hQiw=

#Client使用Server的公钥对内容进行验签
 
with open("server-public.pem") as f:
  key = f.read()
  rsakey = RSA.importKey(key)
  verifier = Signature_pkcs1_v1_5.new(rsakey)
  digest = SHA.new()
  # Assumes the data is base64 encoded to begin with
  digest.update(message)
  is_verify = signer.verify(digest, base64.b64decode(signature))
  print is_verify
#验签结果：
True