threefish 0.0.1

Threefish block cipher
Documentation 
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// Magic constant for key schedule
pub const C240: u64 = 0x1BD11BDAA9FC1A22;

// Rotation constants for the different key lengths
pub const R_256: [[u32; 2]; 8] = [
    [14, 16], [52, 57], [23, 40], [ 5, 37],
    [25, 33], [46, 12], [58, 22], [32, 32]
];

pub const R_512: [[u32; 4]; 8] = [
    [46, 36, 19, 37],
    [33, 27, 14, 42],
    [17, 49, 36, 39],
    [ 44, 9, 54, 56],
    [39, 30, 34, 24],
    [13, 50, 10, 17],
    [25, 29, 39, 43],
    [ 8, 35, 56, 22],
];

pub const R_1024: [[u32; 8]; 8] = [
    [24, 13,  8, 47,  8, 17, 22, 37],
    [38, 19, 10, 55, 49, 18, 23, 52],
    [33,  4, 51, 13, 34, 41, 59, 17],
    [ 5, 20, 48, 41, 47, 28, 16, 25],
    [41,  9, 37, 31, 12, 47, 44, 30],
    [16, 34, 56, 51,  4, 53, 42, 41],
    [31, 44, 47, 46, 19, 42, 44, 25],
    [ 9, 48, 35, 52, 23, 31, 37, 20]
];

// Permutation tables for the different key lengths
pub const P_256: [usize; 4] = [0, 3, 2, 1];
pub const P_512: [usize; 8] = [6, 1, 0, 7, 2, 5, 4, 3];
pub const P_1024: [usize; 16] = [
    0, 15, 2, 11,  6, 13,  4, 9,
    14,  1, 8,  5, 10,  3, 12, 7,
];