// Copyright 2023 Cryspen Sarl // // 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
//! This module contains the traits and related errors for hashers that take array references as //! arguments and write the outputs to mutable array references. //!
#[derive(Debug, PartialEq)] /// Error indicating that hashing failed. pubenum HashError { /// The length of the provided payload is invalid.
InvalidPayloadLength,
}
impl core::fmt::Display for HashError { fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { let text = matchself {
HashError::InvalidPayloadLength => "the length of the provided payload is invalid",
};
f.write_str(text)
}
}
#[cfg(feature = "error-in-core")] mod error_in_core {
impl core::error::Error forsuper::HashError {}
}
/// A trait for incremental hashing, where the output is written into a provided buffer. pubtrait DigestIncremental<const OUTPUT_LEN: usize>: super::DigestIncrementalBase { /// Writes the digest into `digest`. /// /// Note that the digest state can be continued to be used, to extend the digest. fn finish(state: &mutSelf::IncrementalState, digest: &e='color:red'>mut [u8; OUTPUT_LEN]);
}
/// A trait for oneshot hashing, where the output is written into a provided buffer. pubtrait Hash<const OUTPUT_LEN: usize> { /// Writes the digest for the given input byte slice, into `digest` in immediate mode. fn hash(digest: &mut [u8; OUTPUT_LEN], payload: &[u8]) -> Result<(), HashError>;
}
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