streebog 0.11.0

Streebog (GOST R 34.11-2012) hash function
Documentation 
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//! Constants defined in the Streebog specification
//!
//! In the code for optimization purposes `table::SHUFFLED_LIN_TABLE` is used
//! instead of `A` and `P`

pub(crate) const BLOCK_SIZE: usize = 64;

/// Linear transformation matrix
pub(crate) const A: [u64; BLOCK_SIZE] = [
    0x641c314b2b8ee083,
    0xc83862965601dd1b,
    0x8d70c431ac02a736,
    0x07e095624504536c,
    0x0edd37c48a08a6d8,
    0x1ca76e95091051ad,
    0x3853dc371220a247,
    0x70a6a56e2440598e,
    0xa48b474f9ef5dc18,
    0x550b8e9e21f7a530,
    0xaa16012142f35760,
    0x492c024284fbaec0,
    0x9258048415eb419d,
    0x39b008152acb8227,
    0x727d102a548b194e,
    0xe4fa2054a80b329c,
    0xf97d86d98a327728,
    0xeffa11af0964ee50,
    0xc3e9224312c8c1a0,
    0x9bcf4486248d9f5d,
    0x2b838811480723ba,
    0x561b0d22900e4669,
    0xac361a443d1c8cd2,
    0x456c34887a3805b9,
    0x5b068c651810a89e,
    0xb60c05ca30204d21,
    0x71180a8960409a42,
    0xe230140fc0802984,
    0xd960281e9d1d5215,
    0xafc0503c273aa42a,
    0x439da0784e745554,
    0x86275df09ce8aaa8,
    0x0321658cba93c138,
    0x0642ca05693b9f70,
    0x0c84890ad27623e0,
    0x18150f14b9ec46dd,
    0x302a1e286fc58ca7,
    0x60543c50de970553,
    0xc0a878a0a1330aa6,
    0x9d4df05d5f661451,
    0xaccc9ca9328a8950,
    0x4585254f64090fa0,
    0x8a174a9ec8121e5d,
    0x092e94218d243cba,
    0x125c354207487869,
    0x24b86a840e90f0d2,
    0x486dd4151c3dfdb9,
    0x90dab52a387ae76f,
    0x46b60f011a83988e,
    0x8c711e02341b2d01,
    0x05e23c0468365a02,
    0x0ad97808d06cb404,
    0x14aff010bdd87508,
    0x2843fd2067adea10,
    0x5086e740ce47c920,
    0xa011d380818e8f40,
    0x83478b07b2468764,
    0x1b8e0b0e798c13c8,
    0x3601161cf205268d,
    0x6c022c38f90a4c07,
    0xd8045870ef14980e,
    0xad08b0e0c3282d1c,
    0x47107ddd9b505a38,
    0x8e20faa72ba0b470,
];

/// Substitution table
pub(crate) const P: [u8; 256] = [
    252, 238, 221, 17, 207, 110, 49, 22, 251, 196, 250, 218, 35, 197, 4, 77, 233, 119, 240, 219,
    147, 46, 153, 186, 23, 54, 241, 187, 20, 205, 95, 193, 249, 24, 101, 90, 226, 92, 239, 33, 129,
    28, 60, 66, 139, 1, 142, 79, 5, 132, 2, 174, 227, 106, 143, 160, 6, 11, 237, 152, 127, 212,
    211, 31, 235, 52, 44, 81, 234, 200, 72, 171, 242, 42, 104, 162, 253, 58, 206, 204, 181, 112,
    14, 86, 8, 12, 118, 18, 191, 114, 19, 71, 156, 183, 93, 135, 21, 161, 150, 41, 16, 123, 154,
    199, 243, 145, 120, 111, 157, 158, 178, 177, 50, 117, 25, 61, 255, 53, 138, 126, 109, 84, 198,
    128, 195, 189, 13, 87, 223, 245, 36, 169, 62, 168, 67, 201, 215, 121, 214, 246, 124, 34, 185,
    3, 224, 15, 236, 222, 122, 148, 176, 188, 220, 232, 40, 80, 78, 51, 10, 74, 167, 151, 96, 115,
    30, 0, 98, 68, 26, 184, 56, 130, 100, 159, 38, 65, 173, 69, 70, 146, 39, 94, 85, 47, 140, 163,
    165, 125, 105, 213, 149, 59, 7, 88, 179, 64, 134, 172, 29, 247, 48, 55, 107, 228, 136, 217,
    231, 137, 225, 27, 131, 73, 76, 63, 248, 254, 141, 83, 170, 144, 202, 216, 133, 97, 32, 113,
    103, 164, 45, 43, 9, 91, 203, 155, 37, 208, 190, 229, 108, 82, 89, 166, 116, 210, 230, 244,
    180, 192, 209, 102, 175, 194, 57, 75, 99, 182,
];

/// Iteration constants
pub(crate) const C: [[u8; BLOCK_SIZE]; 12] = [
    [
        0x07, 0x45, 0xa6, 0xf2, 0x59, 0x65, 0x80, 0xdd, 0x23, 0x4d, 0x74, 0xcc, 0x36, 0x74, 0x76,
        0x05, 0x15, 0xd3, 0x60, 0xa4, 0x08, 0x2a, 0x42, 0xa2, 0x01, 0x69, 0x67, 0x92, 0x91, 0xe0,
        0x7c, 0x4b, 0xfc, 0xc4, 0x85, 0x75, 0x8d, 0xb8, 0x4e, 0x71, 0x16, 0xd0, 0x45, 0x2e, 0x43,
        0x76, 0x6a, 0x2f, 0x1f, 0x7c, 0x65, 0xc0, 0x81, 0x2f, 0xcb, 0xeb, 0xe9, 0xda, 0xca, 0x1e,
        0xda, 0x5b, 0x08, 0xb1,
    ],
    [
        0xb7, 0x9b, 0xb1, 0x21, 0x70, 0x04, 0x79, 0xe6, 0x56, 0xcd, 0xcb, 0xd7, 0x1b, 0xa2, 0xdd,
        0x55, 0xca, 0xa7, 0x0a, 0xdb, 0xc2, 0x61, 0xb5, 0x5c, 0x58, 0x99, 0xd6, 0x12, 0x6b, 0x17,
        0xb5, 0x9a, 0x31, 0x01, 0xb5, 0x16, 0x0f, 0x5e, 0xd5, 0x61, 0x98, 0x2b, 0x23, 0x0a, 0x72,
        0xea, 0xfe, 0xf3, 0xd7, 0xb5, 0x70, 0x0f, 0x46, 0x9d, 0xe3, 0x4f, 0x1a, 0x2f, 0x9d, 0xa9,
        0x8a, 0xb5, 0xa3, 0x6f,
    ],
    [
        0xb2, 0x0a, 0xba, 0x0a, 0xf5, 0x96, 0x1e, 0x99, 0x31, 0xdb, 0x7a, 0x86, 0x43, 0xf4, 0xb6,
        0xc2, 0x09, 0xdb, 0x62, 0x60, 0x37, 0x3a, 0xc9, 0xc1, 0xb1, 0x9e, 0x35, 0x90, 0xe4, 0x0f,
        0xe2, 0xd3, 0x7b, 0x7b, 0x29, 0xb1, 0x14, 0x75, 0xea, 0xf2, 0x8b, 0x1f, 0x9c, 0x52, 0x5f,
        0x5e, 0xf1, 0x06, 0x35, 0x84, 0x3d, 0x6a, 0x28, 0xfc, 0x39, 0x0a, 0xc7, 0x2f, 0xce, 0x2b,
        0xac, 0xdc, 0x74, 0xf5,
    ],
    [
        0x2e, 0xd1, 0xe3, 0x84, 0xbc, 0xbe, 0x0c, 0x22, 0xf1, 0x37, 0xe8, 0x93, 0xa1, 0xea, 0x53,
        0x34, 0xbe, 0x03, 0x52, 0x93, 0x33, 0x13, 0xb7, 0xd8, 0x75, 0xd6, 0x03, 0xed, 0x82, 0x2c,
        0xd7, 0xa9, 0x3f, 0x35, 0x5e, 0x68, 0xad, 0x1c, 0x72, 0x9d, 0x7d, 0x3c, 0x5c, 0x33, 0x7e,
        0x85, 0x8e, 0x48, 0xdd, 0xe4, 0x71, 0x5d, 0xa0, 0xe1, 0x48, 0xf9, 0xd2, 0x66, 0x15, 0xe8,
        0xb3, 0xdf, 0x1f, 0xef,
    ],
    [
        0x57, 0xfe, 0x6c, 0x7c, 0xfd, 0x58, 0x17, 0x60, 0xf5, 0x63, 0xea, 0xa9, 0x7e, 0xa2, 0x56,
        0x7a, 0x16, 0x1a, 0x27, 0x23, 0xb7, 0x00, 0xff, 0xdf, 0xa3, 0xf5, 0x3a, 0x25, 0x47, 0x17,
        0xcd, 0xbf, 0xbd, 0xff, 0x0f, 0x80, 0xd7, 0x35, 0x9e, 0x35, 0x4a, 0x10, 0x86, 0x16, 0x1f,
        0x1c, 0x15, 0x7f, 0x63, 0x23, 0xa9, 0x6c, 0x0c, 0x41, 0x3f, 0x9a, 0x99, 0x47, 0x47, 0xad,
        0xac, 0x6b, 0xea, 0x4b,
    ],
    [
        0x6e, 0x7d, 0x64, 0x46, 0x7a, 0x40, 0x68, 0xfa, 0x35, 0x4f, 0x90, 0x36, 0x72, 0xc5, 0x71,
        0xbf, 0xb6, 0xc6, 0xbe, 0xc2, 0x66, 0x1f, 0xf2, 0x0a, 0xb4, 0xb7, 0x9a, 0x1c, 0xb7, 0xa6,
        0xfa, 0xcf, 0xc6, 0x8e, 0xf0, 0x9a, 0xb4, 0x9a, 0x7f, 0x18, 0x6c, 0xa4, 0x42, 0x51, 0xf9,
        0xc4, 0x66, 0x2d, 0xc0, 0x39, 0x30, 0x7a, 0x3b, 0xc3, 0xa4, 0x6f, 0xd9, 0xd3, 0x3a, 0x1d,
        0xae, 0xae, 0x4f, 0xae,
    ],
    [
        0x93, 0xd4, 0x14, 0x3a, 0x4d, 0x56, 0x86, 0x88, 0xf3, 0x4a, 0x3c, 0xa2, 0x4c, 0x45, 0x17,
        0x35, 0x04, 0x05, 0x4a, 0x28, 0x83, 0x69, 0x47, 0x06, 0x37, 0x2c, 0x82, 0x2d, 0xc5, 0xab,
        0x92, 0x09, 0xc9, 0x93, 0x7a, 0x19, 0x33, 0x3e, 0x47, 0xd3, 0xc9, 0x87, 0xbf, 0xe6, 0xc7,
        0xc6, 0x9e, 0x39, 0x54, 0x09, 0x24, 0xbf, 0xfe, 0x86, 0xac, 0x51, 0xec, 0xc5, 0xaa, 0xee,
        0x16, 0x0e, 0xc7, 0xf4,
    ],
    [
        0x1e, 0xe7, 0x02, 0xbf, 0xd4, 0x0d, 0x7f, 0xa4, 0xd9, 0xa8, 0x51, 0x59, 0x35, 0xc2, 0xac,
        0x36, 0x2f, 0xc4, 0xa5, 0xd1, 0x2b, 0x8d, 0xd1, 0x69, 0x90, 0x06, 0x9b, 0x92, 0xcb, 0x2b,
        0x89, 0xf4, 0x9a, 0xc4, 0xdb, 0x4d, 0x3b, 0x44, 0xb4, 0x89, 0x1e, 0xde, 0x36, 0x9c, 0x71,
        0xf8, 0xb7, 0x4e, 0x41, 0x41, 0x6e, 0x0c, 0x02, 0xaa, 0xe7, 0x03, 0xa7, 0xc9, 0x93, 0x4d,
        0x42, 0x5b, 0x1f, 0x9b,
    ],
    [
        0xdb, 0x5a, 0x23, 0x83, 0x51, 0x44, 0x61, 0x72, 0x60, 0x2a, 0x1f, 0xcb, 0x92, 0xdc, 0x38,
        0x0e, 0x54, 0x9c, 0x07, 0xa6, 0x9a, 0x8a, 0x2b, 0x7b, 0xb1, 0xce, 0xb2, 0xdb, 0x0b, 0x44,
        0x0a, 0x80, 0x84, 0x09, 0x0d, 0xe0, 0xb7, 0x55, 0xd9, 0x3c, 0x24, 0x42, 0x89, 0x25, 0x1b,
        0x3a, 0x7d, 0x3a, 0xde, 0x5f, 0x16, 0xec, 0xd8, 0x9a, 0x4c, 0x94, 0x9b, 0x22, 0x31, 0x16,
        0x54, 0x5a, 0x8f, 0x37,
    ],
    [
        0xed, 0x9c, 0x45, 0x98, 0xfb, 0xc7, 0xb4, 0x74, 0xc3, 0xb6, 0x3b, 0x15, 0xd1, 0xfa, 0x98,
        0x36, 0xf4, 0x52, 0x76, 0x3b, 0x30, 0x6c, 0x1e, 0x7a, 0x4b, 0x33, 0x69, 0xaf, 0x02, 0x67,
        0xe7, 0x9f, 0x03, 0x61, 0x33, 0x1b, 0x8a, 0xe1, 0xff, 0x1f, 0xdb, 0x78, 0x8a, 0xff, 0x1c,
        0xe7, 0x41, 0x89, 0xf3, 0xf3, 0xe4, 0xb2, 0x48, 0xe5, 0x2a, 0x38, 0x52, 0x6f, 0x05, 0x80,
        0xa6, 0xde, 0xbe, 0xab,
    ],
    [
        0x1b, 0x2d, 0xf3, 0x81, 0xcd, 0xa4, 0xca, 0x6b, 0x5d, 0xd8, 0x6f, 0xc0, 0x4a, 0x59, 0xa2,
        0xde, 0x98, 0x6e, 0x47, 0x7d, 0x1d, 0xcd, 0xba, 0xef, 0xca, 0xb9, 0x48, 0xea, 0xef, 0x71,
        0x1d, 0x8a, 0x79, 0x66, 0x84, 0x14, 0x21, 0x80, 0x01, 0x20, 0x61, 0x07, 0xab, 0xeb, 0xbb,
        0x6b, 0xfa, 0xd8, 0x94, 0xfe, 0x5a, 0x63, 0xcd, 0xc6, 0x02, 0x30, 0xfb, 0x89, 0xc8, 0xef,
        0xd0, 0x9e, 0xcd, 0x7b,
    ],
    [
        0x20, 0xd7, 0x1b, 0xf1, 0x4a, 0x92, 0xbc, 0x48, 0x99, 0x1b, 0xb2, 0xd9, 0xd5, 0x17, 0xf4,
        0xfa, 0x52, 0x28, 0xe1, 0x88, 0xaa, 0xa4, 0x1d, 0xe7, 0x86, 0xcc, 0x91, 0x18, 0x9d, 0xef,
        0x80, 0x5d, 0x9b, 0x9f, 0x21, 0x30, 0xd4, 0x12, 0x20, 0xf8, 0x77, 0x1d, 0xdf, 0xbc, 0x32,
        0x3c, 0xa4, 0xcd, 0x7a, 0xb1, 0x49, 0x04, 0xb0, 0x80, 0x13, 0xd2, 0xba, 0x31, 0x16, 0xf1,
        0x67, 0xe7, 0x8e, 0x37,
    ],
];

/// Iteration constants represented as `[u64; 8]`
pub(crate) const C64: [[u64; 8]; 12] = {
    let mut res = [[0u64; 8]; 12];
    let mut i = 0;
    let mut buf = [0u8; 8];
    while i < 12 {
        let mut j = 0;
        while j < 8 {
            let mut k = 0;
            while k < 8 {
                buf[k] = C[i][8 * j + k];
                k += 1;
            }
            res[i][j] = u64::from_le_bytes(buf);
            j += 1;
        }
        i += 1;
    }
    res
};

/// Precomputed, pre-shuffled table for linear transformation using matrix
/// `const::A` and shuffled using `const::P`
pub(crate) const SHUFFLED_LIN_TABLE: [[u64; 256]; 8] = {
    let mut table = [[0u64; 256]; 8];
    let mut i = 0;
    while i < 8 {
        let mut j = 0;
        while j < 256 {
            let mut accum = 0u64;
            let mut k = 0;
            while k < 8 {
                if P[j] & (1u8 << k) != 0 {
                    accum ^= A[8 * i + k];
                }
                k += 1;
            }
            table[i][j] = accum;
            j += 1;
        }
        i += 1;
    }
    table
};