RSA加密算法

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'''
@Author: MetaNetworks
@Date: 2020-05-23 14:04:58
@LastEditors: MetaNetworks
@LastEditTime: 2020-05-23 15:15:00
@Description: MetaNetworks' Code
'''
#rsa 公钥与私钥示例 
import rsa
import base64
import time

#生成公钥与私钥
t1 = time.time()
(public_key, private_key) = rsa.newkeys(3072)  # RSA加密
print("生成KEY耗费",time.time()-t1)


def rsaEncryption(public_key, cleartext):
	try:
		t1 = time.time()
		result = rsa.encrypt(cleartext.encode(), public_key)
		return base64.encodebytes(result)
	finally:
		t2 = time.time()
		print("加密耗时",t2-t1)
	
# RSA解密
def rsaDecryption(public_key, ciphertext):
	try:
		t1 = time.time()
		result = rsa.decrypt(base64.decodebytes(ciphertext), private_key)
		return result.decode()  #输出公钥、私钥
	finally:
		t2 = time.time()
		print("解密耗时",t2-t1)

print(public_key.save_pkcs1())
print(private_key.save_pkcs1())
cleartext : str
with open("origin_text.txt",'r') as txt:
	cleartext = txt.read()
ciphertext = rsaEncryption(public_key, cleartext) 
print("密文:")
print(ciphertext)
with open("encrypted_text.txt",'w') as txt:
	txt.write(ciphertext.decode("utf-8"))
decipher = rsaDecryption(private_key, ciphertext) 
print("明文:")
print(decipher)

with open("decrypted_text.txt",'w') as txt:
	txt.write(str(decipher))