def encrypt():
print("--------------------加密过程开始--------------------")
print("--------------------MD5加密开始--------------------")
mess=input("请输入想加密的消息(默认为hello):") or "hello"
origin=mess
md5Tmp=md5.md5hash(mess)
print(f"明文长度为: {origin.__len__()}\n输入的明文的MD5值为: {md5Tmp}")
print("--------------------MD5加密结束--------------------\n")
print("--------------------RSA加密开始--------------------")
p = int(input("输入RSA密码算法的p值(必须为素数,默认值为47):") or "47")
q = int(input("输入RSA密码算法的q值(必须为素数且不能与上面的值相同，默认值为463):") or "463")
ListOut = RSA.generate_key_pair(p,q)
encrypted = RSA.encrypt(ListOut[0],ListOut[1], md5Tmp)
encrypted_msg=' '.join(map(lambda x: str(x), encrypted))
print(f"RSA公钥为: ({ListOut[0]},{ListOut[1]})\nRSA私钥的key值为: {ListOut[2]}\nRSA私钥的n值为: {ListOut[1]}\nRSA密文为:\n{encrypted_msg}\n")
print("--------------------RSA加密结束--------------------\n")
print("--------------------DES加密开始--------------------")
combine=origin+encrypted_msg
noPairKey=input("输入您的DES密钥(默认值为hello123，必须为8个):") or "hello123"
desObject=DES.des()
finalOut=desObject.encrypt(noPairKey,combine,padding=True)
f=open("encrypted.txt","wb")
f.write(bytes(finalOut,'utf-8'))
f.close()
print(f"DES明文为:\n{combine}\nDES密文为:\n{finalOut}\n密文已编码后写入encrypted.txt文件中")
print("--------------------DES加密结束--------------------")
print("--------------------加密过程结束--------------------\n")
def encryptData(text, private_key, peer_public):
# des encrypt message
key = DES.generatekey()
text = DES.modifytext(text)
d = DES.des()
desEndata = d.encrypt(key, text)
print desEndata
desEndata = "".join(str(e) for e in desEndata)
# hash message and signiture
hashAndSign = RSA.encrypt(md5(text), private_key)
# encrypted des key and signed message with the other client public_key
middleData = key + '/' + hashAndSign
data2 = RSA.encrypt(middleData, peer_public)
#combine data2 and desEndata
data = desEndata + '/' + data2
return data
def decrypt():
print("--------------------解密过程开始--------------------")
print("--------------------DES解密开始--------------------")
desObject2=DES.des()
print("正在从encrypted.txt中获取密文.....")
f=open("encrypted.txt","rb")
encrypted=(f.read()).decode("utf-8")
f.close()
noPairKey2=input("输入您的DES密钥(默认为hello123):") or "hello123"
unSymm=desObject2.decrypt(noPairKey2,encrypted)
length=int(input("请输入源数据长度(默认为hello的5):") or "5")
plainText=unSymm[0:length]
print(f"源数据明文为为:{plainText}")
md5A=md5.md5hash(plainText)
print(f"源数据明文计算出的MD5值为:\n{md5A}")
decryptMes=unSymm[length:]
decryptMes2=decryptMes.split(' ')
for i in range(0,(len(decryptMes2))-1):
decryptMes2[i]=int(decryptMes2[i])
decryptMes2[len(decryptMes2)-1]=int(re.search(r'\d+', decryptMes2[len(decryptMes2)-1]).group())
print("--------------------DES解密结束--------------------\n")
print("--------------------RSA解密开始--------------------")
print(f"获得RSA密文为:")
for p in range(0,(len(decryptMes2)-1)):
print(f"{decryptMes2[p]} ",end='')
print()
key=int(input("请输入您的私钥的key:"))
n=int(input("请输入您的私钥的n:"))
md5B=RSA.decrypt(key,n,decryptMes2)
print(f"RSA解密所得的MD5值为:\n{md5B}")
print("--------------------RSA解密结束--------------------\n")
print("--------------------MD5比对开始--------------------")
print(f"明文的文本计算出的MD5值为: {md5A}")
print(f"经过RSA解密所得的MD5值为: {md5B}")
print()
if(md5A==md5B):
print("结论: 比对结果相同，没有错误")
else:
print("结论: 比对结果不同，出现了错误")
print("--------------------MD5比对结束--------------------\n")
print("--------------------解密过程结束--------------------")
def decryptData(cipher, private_key, peer_public):
cipher = cipher.split('/')
try:
#get des key and hashed message
middleData = RSA.decrypt(cipher[1], private_key)
key = middleData.split('/')[0]
hashAndSign = middleData.split('/')[1]
#decrypt signed message to get hash
hashData = RSA.decrypt(hashAndSign, peer_public)
except:
return 'you are not a trusted user, you are prohibited see the message'
#des decrypt
d = DES.des()
descipher = list(cipher[0])
descipher = bit_array_to_string(descipher)
desDedata = d.decrypt(key, descipher)
desDedata = bit_array_to_string(desDedata)
#hash
#md5(desDedata)
if hashData == md5(desDedata):
return desDedata.rstrip('#')
else:
return 'failed on decipher, your system is under an attack'
def __init__(self):
self.des = DES.des()
self.ddes = DES.des()
start = time.clock()
s = pbe.encrypt(msg, passwd)
end = time.clock()
print(s)
print(pbe.decrypt(s, passwd))
print('--------------------------PBE end--------------------------\n')
print('Cost ' + str(end - start) + 's\n')
costdic[choose] = end - start
elif choose == 5:
print('--------------------------DES--------------------------\n')
key = raw_input('What is your encryption key?\n')
text = raw_input('What would you like to encrypt?\n')
#
start = time.clock()
d = DES.des()
r = d.encrypt(key, text)
end = time.clock()
r2 = d.decrypt(key, r)
print("Cipher: %r" % r)
print("Deciphered: ", str(r2))
print('--------------------------DES end--------------------------\n')
print('Cost ' + str(end - start) + 's\n')
costdic[choose] = end - start
elif choose == 6:
print('--------------------------MD5--------------------------\n')
mess = raw_input("What would you like to hash?\n")
start = time.clock()
md5.init_mess(mess)
