script_webcrypto/subtlecrypto/
sha_operation.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use script_bindings::error::Error;
6use sha1::{Digest, Sha1};
7use sha2::{Sha256, Sha384, Sha512};
8
9use crate::subtlecrypto::{Algorithm, CryptoAlgorithm};
10
11/// <https://w3c.github.io/webcrypto/#sha-operations-digest>
12pub(crate) fn digest(nomrmalized_algorithm: &Algorithm, message: &[u8]) -> Result<Vec<u8>, Error> {
13    // Step 1.
14    // If the name member of normalizedAlgorithm is a cases-sensitive string match for "SHA-1":
15    //     Let result be the result of performing the SHA-1 hash function defined in Section 6.1 of
16    //     [FIPS-180-4] using message as the input message, M.
17    // If the name member of normalizedAlgorithm is a cases-sensitive string match for "SHA-256":
18    //     Let result be the result of performing the SHA-256 hash function defined in Section 6.2
19    //     of [FIPS-180-4] using message as the input message, M.
20    // If the name member of normalizedAlgorithm is a cases-sensitive string match for "SHA-384":
21    //     Let result be the result of performing the SHA-384 hash function defined in Section 6.5
22    //     of [FIPS-180-4] using message as the input message, M.
23    // If the name member of normalizedAlgorithm is a cases-sensitive string match for "SHA-512":
24    //     Let result be the result of performing the SHA-512 hash function defined in Section 6.4
25    //     of [FIPS-180-4] using message as the input message, M.
26    // Step 2. If performing the operation results in an error, then throw an OperationError.
27    let result = match nomrmalized_algorithm.name {
28        CryptoAlgorithm::Sha1 => Sha1::digest(message).to_vec(),
29        CryptoAlgorithm::Sha256 => Sha256::digest(message).to_vec(),
30        CryptoAlgorithm::Sha384 => Sha384::digest(message).to_vec(),
31        CryptoAlgorithm::Sha512 => Sha512::digest(message).to_vec(),
32        _ => {
33            return Err(Error::NotSupported(Some("Algorithm not supported".into())));
34        },
35    };
36
37    // Step 3. Return result.
38    Ok(result)
39}
script_webcrypto/subtlecrypto/sha_operation.rs

script_webcrypto/subtlecrypto/
sha_operation.rs
