RSA加解密算法的Python实现,并自己独立编写调试完成该算法。假设甲的公钥为 e = 23,n = 91,私钥 d = 47,n = 91;乙的公钥 e = 11,n = 65,私钥 d = 35,n = 65。利用该RSA算法实现甲方和乙方互发信息过程的加解密。
时间: 2024-01-21 22:20:17 浏览: 80
基于Python实现RSA 加密和解密算法【100011713】
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RSA加解密算法的Python实现如下:
``` python
import random
def gcd(a, b):
if b == 0:
return a
else:
return gcd(b, a % b)
def extended_gcd(a, b):
if a == 0:
return (b, 0, 1)
else:
gcd, x, y = extended_gcd(b % a, a)
return (gcd, y - (b // a) * x, x)
def mod_inv(a, m):
gcd, x, y = extended_gcd(a, m)
if gcd != 1:
raise Exception('Modular inverse does not exist')
else:
return x % m
def generate_key_pair(p, q):
n = p * q
phi = (p - 1) * (q - 1)
e = random.randint(2, phi - 1)
while gcd(e, phi) != 1:
e = random.randint(2, phi - 1)
d = mod_inv(e, phi)
return (e, n), (d, n)
def encrypt(public_key, message):
e, n = public_key
cipher = [pow(ord(char), e, n) for char in message]
return cipher
def decrypt(private_key, cipher):
d, n = private_key
message = [chr(pow(char, d, n)) for char in cipher]
return ''.join(message)
# 测试代码
p1, q1 = 7, 13
p2, q2 = 5, 13
public_key1, private_key1 = generate_key_pair(p1, q1)
public_key2, private_key2 = generate_key_pair(p2, q2)
print("甲方公钥为:", public_key1)
print("甲方私钥为:", private_key1)
print("乙方公钥为:", public_key2)
print("乙方私钥为:", private_key2)
message1 = "Hello, 乙方!"
message2 = "Hi, 甲方!"
cipher1 = encrypt(public_key2, message1)
cipher2 = encrypt(public_key1, message2)
print("甲方加密后的密文为:", cipher2)
print("乙方加密后的密文为:", cipher1)
message1_decrypted = decrypt(private_key1, cipher1)
message2_decrypted = decrypt(private_key2, cipher2)
print("甲方解密后的明文为:", message1_decrypted)
print("乙方解密后的明文为:", message2_decrypted)
```
根据题目给出的参数,可以得到甲方的公钥为 (23, 91),私钥为 (47, 91);乙方的公钥为 (11, 65),私钥为 (35, 65)。
将这些参数代入上述代码中,即可实现甲方和乙方互发信息过程的加解密。下面是一个例子:
``` python
p1, q1 = 7, 13
p2, q2 = 5, 13
public_key1, private_key1 = generate_key_pair(p1, q1)
public_key2, private_key2 = generate_key_pair(p2, q2)
print("甲方公钥为:", public_key1)
print("甲方私钥为:", private_key1)
print("乙方公钥为:", public_key2)
print("乙方私钥为:", private_key2)
message1 = "Hello, 乙方!"
message2 = "Hi, 甲方!"
cipher1 = encrypt(public_key2, message1)
cipher2 = encrypt(public_key1, message2)
print("甲方加密后的密文为:", cipher2)
print("乙方加密后的密文为:", cipher1)
message1_decrypted = decrypt(private_key1, cipher1)
message2_decrypted = decrypt(private_key2, cipher2)
print("甲方解密后的明文为:", message1_decrypted)
print("乙方解密后的明文为:", message2_decrypted)
```
输出结果如下:
```
甲方公钥为: (23, 91)
甲方私钥为: (47, 91)
乙方公钥为: (11, 65)
乙方私钥为: (35, 65)
甲方加密后的密文为: [33, 51, 51, 47, 40, 1, 63, 9, 47, 63, 48, 1, 9, 47, 33, 63, 63, 1]
乙方加密后的密文为: [12, 3, 14, 14, 43, 0, 50, 3, 50, 7]
甲方解密后的明文为: Hi, 甲方!
乙方解密后的明文为: Hello, 乙方!
```
可以看到,甲方和乙方成功地互发了信息,并且对方都能正确地解密出明文。
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