# rsa 加密 def rsa_encrypt_bytes(bytes_str, n, e): if not isinstance(bytes_str, bytes): return None # 导入rsa库 import rsa.common pubkey = rsa.PublicKey(n, e) key_length = rsa.common.byte_size(n) max_msg_length = key_length - 11 count = len(bytes_str) // max_msg_length if len(bytes_str) % max_msg_length > 0: count = count + 1 cry_bytes = b'' # rsa加密要以max_msg_length分组, 每组分别加密(加密的数据长度为key_length, 解密时每key_length长度解密然后相加) for i in range(count): start = max_msg_length * i size = max_msg_length content = bytes_str[start: start + size] # rsa 分组 加密 crypto = rsa.encrypt(content, pubkey) cry_bytes = cry_bytes + crypto return cry_bytes # rsa 解密, bytes_string是rsa_encrypt_hex, rsa_encrypt_bytes的返回值 def rsa_decrypt(bytes_string, n, e, d, p, q): # 导入rsa库 import rsa.common pri_key = rsa.PrivateKey(n, e, d, p, q) key_length = rsa.common.byte_size(n) if len(bytes_string) % key_length != 0: # 如果数据长度不是key_length的整数倍, 则数据是无效的 return None count = len(bytes_string) // key_length d_cty_bytes = b'' # 分组解密 for i in range(count): start = key_length * i size = key_length content = bytes_string[start: start + size] # rsa 分组 解密 d_crypto = rsa.decrypt(content, pri_key) d_cty_bytes = d_cty_bytes + d_crypto return d_cty_bytes # rsa 加密, 注意: 这里是传递的是16进制字符串 def rsa_encrypt_hex(hex_string, n, e): return rsa_encrypt_bytes(bytes.fromhex(hex_string), n, e) # rsa 库的测试 def test_encrypt_decrypt(): import rsa # 产生公钥私钥 (pub, pri) = rsa.newkeys(256) # 构建新的公钥私钥 pubkey = rsa.PublicKey(pri.n, pri.e) pri_key = rsa.PrivateKey(pri.n, pri.e, pri.d, pri.p, pri.q) message = b'\x00\x00\x00\x00\x01' # 加密 message crypto = rsa.encrypt(message, pubkey) # 解密 d_crypto = rsa.decrypt(crypto, pri_key) print(d_crypto) if __name__ == '__main__': import rsa keys = rsa.newkeys(256) bts_str = 'hello world 中文'.encode() crypto_bytes = rsa_encrypt_bytes(bts_str, keys[1].n, keys[1].e) d_crypto_bytes = rsa_decrypt(crypto_bytes, keys[1].n, keys[1].e, keys[1].d, keys[1].p, keys[1].q) print(d_crypto_bytes.decode()) hex_str = '001122334455AAff' crypto_bytes = rsa_encrypt_hex(hex_str, keys[1].n, keys[1].e) d_crypto_bytes = rsa_decrypt(crypto_bytes, keys[1].n, keys[1].e, keys[1].d, keys[1].p, keys[1].q) print(d_crypto_bytes.hex())