mirror of
https://github.com/wolfSSL/wolfssl.git
synced 2026-07-08 03:10:48 +02:00
Josh Holtrop
100 lines
2.9 KiB
Rust
100 lines
2.9 KiB
Rust
/*
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* Copyright (C) 2006-2026 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/*!
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RustCrypto `digest::Mac` trait implementations for the wolfCrypt CMAC types.
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This module provides typed AES-CMAC wrappers with implementations of the
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traits from the `digest` crate (`MacMarker`, `KeyInit`, `Update`,
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`FixedOutput`) for each AES key size (128, 192, 256). With these
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implementations the `digest::Mac` trait becomes available via its blanket
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implementation, allowing these CMAC types to be used anywhere a RustCrypto
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`Mac` is accepted.
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Any failure returned by the underlying wolfCrypt call in a trait method will
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result in a panic, matching the infallible signatures required by the
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RustCrypto traits.
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*/
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use digest::consts::{U16, U24, U32};
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macro_rules! impl_cmac_mac {
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(
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$(#[$attr:meta])*
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$name:ident, key = $key_size:ty
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) => {
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$(#[$attr])*
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pub struct $name {
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cmac: crate::cmac::CMAC,
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}
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$(#[$attr])*
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impl digest::MacMarker for $name {}
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$(#[$attr])*
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impl digest::OutputSizeUser for $name {
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type OutputSize = U16;
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}
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$(#[$attr])*
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impl digest::common::KeySizeUser for $name {
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type KeySize = $key_size;
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}
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$(#[$attr])*
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impl digest::KeyInit for $name {
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fn new(key: &digest::Key<Self>) -> Self {
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Self {
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cmac: crate::cmac::CMAC::new(key.as_slice())
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.expect("wolfCrypt CMAC init failed"),
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}
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}
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}
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$(#[$attr])*
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impl digest::Update for $name {
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fn update(&mut self, data: &[u8]) {
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crate::cmac::CMAC::update(&mut self.cmac, data)
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.expect("wolfCrypt CMAC update failed");
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}
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}
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$(#[$attr])*
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impl digest::FixedOutput for $name {
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fn finalize_into(self, out: &mut digest::Output<Self>) {
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self.cmac.finalize(out.as_mut_slice())
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.expect("wolfCrypt CMAC finalize failed");
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}
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}
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};
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}
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impl_cmac_mac! {
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CmacAes128, key = U16
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}
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impl_cmac_mac! {
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CmacAes192, key = U24
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}
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impl_cmac_mac! {
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CmacAes256, key = U32
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}
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