c2pa 0.82.1

Rust SDK for C2PA (Coalition for Content Provenance and Authenticity) implementors
Documentation 
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// Copyright 2022 Adobe. All rights reserved.
// This file is licensed to you under the Apache License,
// Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
// or the MIT license (http://opensource.org/licenses/MIT),
// at your option.

// Unless required by applicable law or agreed to in writing,
// this software is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR REPRESENTATIONS OF ANY KIND, either express or
// implied. See the LICENSE-MIT and LICENSE-APACHE files for the
// specific language governing permissions and limitations under
// each license.

//! Hash convenience functions.

/// Given a byte slice, return the SHA-1 hash of that content.
#[allow(dead_code)] // not used on all platforms
pub(crate) fn sha1(data: &[u8]) -> Vec<u8> {
    use sha1::{Digest, Sha1};

    let mut hasher = Sha1::default();
    hasher.update(data);
    hasher.finalize().to_vec()
}

/// Given a byte slice, return the SHA-256 hash of that content.
pub fn sha256(data: &[u8]) -> Vec<u8> {
    use sha2::{Digest, Sha256};

    let mut hasher = Sha256::new();
    hasher.update(data);
    hasher.finalize().to_vec()
}

#[cfg(test)]
mod tests {
    #![allow(clippy::expect_used)]
    #![allow(clippy::panic)]
    #![allow(clippy::unwrap_used)]

    #[cfg(all(target_arch = "wasm32", not(target_os = "wasi")))]
    use wasm_bindgen_test::wasm_bindgen_test;

    use crate::crypto::hash::{sha1, sha256};

    #[test]
    #[cfg_attr(
        all(target_arch = "wasm32", not(target_os = "wasi")),
        wasm_bindgen_test
    )]
    fn test_sha1() {
        let hash = sha1(b"test message");
        assert_eq!(
            hash,
            [
                53, 238, 131, 134, 65, 13, 65, 209, 75, 63, 119, 159, 201, 95, 70, 149, 244, 133,
                22, 130
            ]
        );
    }

    #[test]
    #[cfg_attr(
        all(target_arch = "wasm32", not(target_os = "wasi")),
        wasm_bindgen_test
    )]
    fn test_sha256() {
        let hash = sha256(b"test message");
        assert_eq!(
            hash,
            [
                63, 10, 55, 123, 160, 164, 164, 96, 236, 182, 22, 246, 80, 124, 224, 216, 207, 163,
                231, 4, 2, 93, 79, 218, 62, 208, 197, 202, 5, 70, 135, 40
            ]
        );
    }
}