| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License.. |
| |
| #![crate_name = "helloworldsampleenclave"] |
| #![crate_type = "staticlib"] |
| |
| #![cfg_attr(not(target_env = "sgx"), no_std)] |
| #![cfg_attr(target_env = "sgx", feature(rustc_private))] |
| |
| extern crate sgx_types; |
| #[cfg(not(target_env = "sgx"))] |
| #[macro_use] |
| extern crate sgx_tstd as std; |
| |
| use sgx_types::*; |
| use std::string::String; |
| use std::vec::Vec; |
| use std::io::{self, Write}; |
| use std::slice; |
| |
| #[no_mangle] |
| pub extern "C" fn say_something(some_string: *const u8, some_len: usize) -> sgx_status_t { |
| |
| let str_slice = unsafe { slice::from_raw_parts(some_string, some_len) }; |
| let _ = io::stdout().write(str_slice); |
| |
| // A sample &'static string |
| let rust_raw_string = "This is a in-Enclave "; |
| // An array |
| let word:[u8;4] = [82, 117, 115, 116]; |
| // An vector |
| let word_vec:Vec<u8> = vec![32, 115, 116, 114, 105, 110, 103, 33]; |
| |
| // Construct a string from &'static string |
| let mut hello_string = String::from(rust_raw_string); |
| |
| // Iterate on word array |
| for c in word.iter() { |
| hello_string.push(*c as char); |
| } |
| |
| // Rust style convertion |
| hello_string += String::from_utf8(word_vec).expect("Invalid UTF-8") |
| .as_str(); |
| |
| // Ocall to normal world for output |
| println!("{}", &hello_string); |
| |
| let a = 2; |
| let b = dbg!(a * 2) + 1; |
| // ^-- prints: [src/main.rs:2] a * 2 = 4 |
| assert_eq!(b, 5); |
| |
| sgx_status_t::SGX_SUCCESS |
| } |