hashlib-prelude 0.1.0

An abstraction layer for wrapping implementations of various hash algorithms.
Documentation 
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// Copyright (C) 2018 Boyu Yang
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use super::{HashAlgo, HashAlgoKernel, Hashable};

macro_rules! impl_hashable_for {
    (&($type:ty)[..]) => {
        impl<Algo> Hashable<Algo> for $type
        where
            Algo: HashAlgo,
        {
            fn hash(
                &self,
            ) -> Result<
                <<Algo as HashAlgo>::Kernel as HashAlgoKernel>::Output,
                <<Algo as HashAlgo>::Kernel as HashAlgoKernel>::Error,
            > {
                Algo::hash(&self[..])
            }
        }
    };
    ($type:ty) => {
        impl<Algo> Hashable<Algo> for $type
        where
            Algo: HashAlgo,
        {
            fn hash(
                &self,
            ) -> Result<
                <<Algo as HashAlgo>::Kernel as HashAlgoKernel>::Output,
                <<Algo as HashAlgo>::Kernel as HashAlgoKernel>::Error,
            > {
                Algo::hash(self)
            }
        }
    };
}

macro_rules! impl_hashable_for_fixed_size_u8_array {
    [ $( [ $( $size:expr ),* ] ),* ] => {
        $( $( impl_hashable_for_fixed_size_u8_array![$size]; )* )*
    };
    ($size:expr) => {
        impl_hashable_for!(&([u8; $size])[..]);
    };
}

impl_hashable_for!(&[u8]);
impl_hashable_for!(&(Vec<u8>)[..]);
impl_hashable_for_fixed_size_u8_array![
    [0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07],
    [0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f],
    [0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17],
    [0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f],
    [0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27],
    [0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f],
    [0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37],
    [0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f],
    [0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47],
    [0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f],
    [0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57],
    [0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f],
    [0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67],
    [0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f],
    [0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77],
    [0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f],
    [0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87],
    [0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f],
    [0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97],
    [0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f],
    [0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7],
    [0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf],
    [0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7],
    [0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf],
    [0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7],
    [0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf],
    [0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7],
    [0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf],
    [0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7],
    [0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef],
    [0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7],
    [0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff],
    [0x100, 0x180, 0x200, 0x400, 0x800],
    [0x1000, 0x2000]
];