5f7eb3177b
* Adds a type for cryptographic secrets * default implementations and zeroize documentation * removes whitespace
68 lines
1.9 KiB
Rust
68 lines
1.9 KiB
Rust
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#![cfg_attr(not(feature = "std"), no_std)]
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#![feature(wrapping_int_impl)]
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extern crate alloc;
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pub mod aes256;
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pub mod cbc;
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mod ec;
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pub mod ecdh;
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pub mod ecdsa;
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pub mod hkdf;
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pub mod hmac;
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pub mod sha256;
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pub mod util;
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/// Trait for hash functions that returns a 256-bit hash.
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///
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/// When you implement this trait, make sure to implement `hash_mut` and `hmac_mut` first, because
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/// the default implementations of `hash` and `hmac` rely on it.
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pub trait Hash256: Sized {
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fn new() -> Self;
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fn update(&mut self, contents: &[u8]);
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fn finalize(self, output: &mut [u8; 32]);
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fn hash(contents: &[u8]) -> [u8; 32] {
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let mut output = [0; 32];
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Self::hash_mut(contents, &mut output);
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output
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}
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fn hash_mut(contents: &[u8], output: &mut [u8; 32]) {
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let mut h = Self::new();
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h.update(contents);
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h.finalize(output)
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}
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fn hmac(key: &[u8; 32], contents: &[u8]) -> [u8; 32] {
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let mut output = [0; 32];
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Self::hmac_mut(key, contents, &mut output);
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output
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}
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fn hmac_mut(key: &[u8; 32], contents: &[u8], output: &mut [u8; 32]) {
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hmac::software_hmac_256::<Self>(key, contents, output);
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}
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}
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/// Trait for hash functions that operate on 64-byte input blocks.
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pub trait HashBlockSize64Bytes {
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type State;
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fn hash_block(state: &mut Self::State, block: &[u8; 64]);
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}
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