1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

// Copyright 2023 RISC Zero, Inc.
//
// 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.

//! SHA-256 hashing services

pub use risc0_zkp::core::sha::{Digest, Sha, DIGEST_WORDS, DIGEST_WORD_SIZE, SHA256_INIT};

pub fn sha() -> &'static impl Sha {
    cfg_if::cfg_if! {
        if #[cfg(target_os = "zkvm")] {
            use crate::guest::sha::Impl;
        } else {
            use risc0_zkp::core::sha_cpu::Impl;
        }
    }
    static IMPL: Impl = Impl {};
    &IMPL
}