HBRSAHandler* handler = [HBRSAHandler new];        //加密    NSString *PublicFilePath = [[NSBundle mainBundle] pathForResource:@"serverPubKey.pem" ofType:nil];    [handler importKeyWithType:KeyTypePublic andPath:PublicFilePath];//加载公钥    NSString *test = @"需要加密的数据";    test = [handler encryptWithPublicKey:test];    NSLog(@"加密结果 =%@",test);        //签名    NSString *privateKeyFilePath = [[NSBundle mainBundle] pathForResource:@"clientPriKey.pem" ofType:nil];    [handler importKeyWithType:KeyTypePrivate andPath:privateKeyFilePath];//加载私钥    NSString *xml = @"this is test message!";    xml = [handler signString:xml];    NSLog(@"签名结果：%@",xml);