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/*
*
* Hedera Rust SDK
*
* Copyright (C) 2023 - 2023 Hedera Hashgraph, LLC
*
* Licensed 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.
*
*/
use std::ptr;
use libc::size_t;
use sha3::Digest;
#[no_mangle]
pub unsafe extern "C" fn hedera_crypto_sha3_keccak256_digest(
bytes: *const u8,
bytes_size: size_t,
result_out: *mut *mut u8,
) -> size_t {
assert!(!bytes.is_null());
assert!(!result_out.is_null());
let bytes = unsafe { std::slice::from_raw_parts(bytes, bytes_size) };
let result = sha3::Keccak256::digest(bytes).to_vec().into_boxed_slice();
let bytes = Box::leak(result);
let len = bytes.len();
let bytes = bytes.as_mut_ptr();
// safety: invariants promise that `buf` must be valid for writes.
unsafe {
ptr::write(result_out, bytes);
}
len
}