import rsa# RSA 算法規定：
# 待加密的字節數不能超過密鑰的長度值除以 8 再減去 11NBIT = 4096
CAN_ENCODE_LEN = NBIT // 8 - 11
PER_ENCODE_LEN = CAN_ENCODE_LEN - (CAN_ENCODE_LEN % 2)
PER_DECODE_LEN = CAN_ENCODE_LEN + 11PUBKEY_STR = """"""PRIKEY_STR = """"""def gen_pem_file():(public_key, private_key) = rsa.newkeys(NBIT)  # rsa-4096 加密得到公鑰和私鑰# 將公鑰保存到文件with open('public.pem', 'wb') as file_pub:file_pub.write(public_key.save_pkcs1())# 將私鑰保存到文件with open('private.pem', 'wb') as file_pri:file_pri.write(private_key.save_pkcs1())if not PUBKEY_STR:# 取出公鑰try:with open('public.pem', 'rb') as __file_pub:PUBKEY_STR = __file_pub.read()except FileNotFoundError:gen_pem_file()with open('public.pem', 'rb') as __file_pub:PUBKEY_STR = __file_pub.read()if not PRIKEY_STR:# 取出私鑰try:with open('private.pem', 'rb') as __file_pri:PRIKEY_STR = __file_pri.read()except FileNotFoundError:gen_pem_file()with open('public.pem', 'rb') as __file_pub:PUBKEY_STR = __file_pub.read()with open('private.pem', 'rb') as __file_pri:PRIKEY_STR = __file_pri.read()PUBKEY = rsa.PublicKey.load_pkcs1(PUBKEY_STR)
PRIKEY = rsa.PrivateKey.load_pkcs1(PRIKEY_STR)# 加密字符串string
def rsa_str_encode(s):s = s.encode('utf-16')len_s = len(s)res = b''res_len=0while len_s - res_len > PER_ENCODE_LEN:res += rsa.encrypt(s[res_len:res_len+PER_ENCODE_LEN], PUBKEY)  # 使用公鑰去加密字符串res_len+=PER_ENCODE_LENprint('RSA加密 %d ... %.2f%%' % (res_len, 100* res_len/len_s))res += rsa.encrypt(s[res_len:], PUBKEY)  # 使用公鑰去加密字符串return res# 解密字符串string
def rsa_str_decode(s):len_s = len(s)res = b''res_len=0while len_s - res_len > PER_DECODE_LEN:res += rsa.decrypt(s[res_len:res_len+PER_DECODE_LEN], PRIKEY)  # 用私鑰去解密res_len+=PER_DECODE_LENprint('RSA解密 %d ... %.2f%%' % (res_len, 100 * res_len / len_s))res += rsa.decrypt(s[res_len:], PRIKEY)return res.decode('utf-16')# 加密字符串string list
def rsa_strs_encode(s):s = s.encode('utf-16')len_s = len(s)res_len=0while len_s - res_len > PER_ENCODE_LEN:yield rsa.encrypt(s[res_len:res_len+PER_ENCODE_LEN], PUBKEY)  # 使用公鑰去加密字符串res_len+=PER_ENCODE_LENyield rsa.encrypt(s[res_len:], PUBKEY)  # 使用公鑰去加密字符串# 解密字符串string list
def rsa_strs_decode(ss):for i, line in enumerate(ss):res = rsa.decrypt(line, PRIKEY)try:yield res.decode('utf-16')except UnicodeDecodeError:import tracebackprint(traceback.format_exc())if __name__ == '__main__':en_str = rsa_str_encode('dsde軍鱷科！@#￥cvr$#2#@1~~!@!#,.,2p4pfvwdwefv1234678435092430r098ygoiufvre2vdvwdvwfvw,.efkiv3evclkvs你'*12)de_crypt = rsa_str_decode(en_str)  # 用私鑰去解密print(de_crypt)en_strs = rsa_strs_encode('dsde軍鱷科！@#￥cvr$#2#@1~~!@!#,.,2p4pfvwdwefv1234678435092430r098ygoiufvre2vdvwdvwfvw,.efkiv3evclkvs你' * 122)de_crypts = rsa_strs_decode(en_strs)  # 用私鑰去解密# print(''.join(de_crypt))for _ in de_crypts:print(_)