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| import time import re
''' 加入了输入数据判断是否为纯数字 可以自由选择加密或者解密 对文本显示进行了优化 '''
def ext_gcd(a, b): if b == 0: x1 = 1 y1 = 0 x = x1 y = y1 r = a return r, x, y else: r, x1, y1 = ext_gcd(b, a % b) x = y1 y = x1 - a // b * y1 return r, x, y
def exp_mode(base, exp, n): exp_array = bin(exp)[2:][::-1] ll = len(exp_array) result = 1 for i in range(ll): if ('1'==exp_array[i]): result = (result * base) % n base = (base * base) % n return result % n
def gen_key(p, q): n = p * q fy = (p - 1) * (q - 1) e = 65537 a = e b = fy r, x, y = ext_gcd(a, b) if x < 0: x = x + fy d = x return (n, e), (n, d)
def encrypt(m, pubkey): n = pubkey[0] e = pubkey[1] time_start_e = time.time() c = exp_mode(m, e, n) time_end_e = time.time() time_e = time_end_e - time_start_e return c,time_e
def decrypt(c, selfkey): n = selfkey[0] d = selfkey[1] time_start_d = time.time() m = exp_mode(c, d, n) time_end_d = time.time() time_d = time_end_d - time_start_d return m,time_d
def is_str(m): an = re.match('[0-9]+$', m) if an == None: print('密码必须是纯数字!') return False else: return True
if __name__ == "__main__": while True: '''公钥私钥中用到的两个大质数p,q,都是1024位''' p = 106697219132480173106064317148705638676529121742557567770857687729397446898790451577487723991083173010242416863238099716044775658681981821407922722052778958942891831033512463262741053961681512908218003840408526915629689432111480588966800949428079015682624591636010678691927285321708935076221951173426894836169 q = 144819424465842307806353672547344125290716753535239658417883828941232509622838692761917211806963011168822281666033695157426515864265527046213326145174398018859056439431422867957079149967592078894410082695714160599647180947207504108618794637872261572262805565517756922288320779308895819726074229154002310375209 '''生成公钥私钥''' pubkey, selfkey = gen_key(p, q) '''需要被加密的信息转化成数字,长度小于秘钥n的长度,如果信息长度大于n的长度,那么分段进行加密,分段解密即可。''' m = input("请输入你想要处理的数据(必须是纯数字)\n") if is_str(m): m = int(m) print("待处理信息-->",m,"\n") '''信息加密,m被加密的信息,c是加密后的信息''' ask = input("请问是要进行加密(输入1)还是解密(输入2)?\n") if ask == "1": c,tme = encrypt(m, pubkey) print("被加密后的密文-->",c,"\n") print("加密用时",tme,"s\n") '''信息解密''' elif ask == "2": d,tmd = decrypt(m, selfkey) print("被解密后的明文-->",d) print("解密用时",tmd,"s\n") else: print("请输入“1”(加密)或者“2”(解密)!\n")
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v1.5.2