faest 0.2.2

use sha3::{
    Shake128, Shake128Reader, Shake256, Shake256Reader,
    digest::{ExtendableOutput, Update, XofReader},
};

use crate::utils::Reader;

pub(crate) trait RandomOracle {
    type Hasher<const SEP: u8>: Hasher + Default + Clone;

    /// Create hasher for `H0`
    fn h0_init() -> Self::Hasher<0> {
        Self::Hasher::default()
    }

    /// Create hasher for `H1`
    fn h1_init() -> Self::Hasher<1> {
        Self::Hasher::default()
    }

    /// Create hasher for `H2^0`
    fn h2_0_init() -> Self::Hasher<8> {
        Self::Hasher::default()
    }

    /// Create hasher for `H2^1`
    fn h2_1_init() -> Self::Hasher<9> {
        Self::Hasher::default()
    }

    /// Create hasher for `H2^2`
    fn h2_2_init() -> Self::Hasher<10> {
        Self::Hasher::default()
    }

    /// Create hasher for `H2^3`
    fn h2_3_init() -> Self::Hasher<11> {
        Self::Hasher::default()
    }

    /// Create hasher for `H3`
    fn h3_init() -> Self::Hasher<3> {
        Self::Hasher::default()
    }

    /// Create hasher for `H4`
    fn h4_init() -> Self::Hasher<4> {
        Self::Hasher::default()
    }
}

/// Interface for hashers associated ot the random oracles
pub(crate) trait Hasher {
    /// Digest reader
    type Reader: Reader;

    /// Hash additional bytes
    fn update(&mut self, data: &[u8]);

    /// Finish hashing
    fn finish(self) -> Self::Reader;
}

pub(crate) struct RandomOracleShake128 {}

/// Hasher based on `SHAKE128`
#[derive(Debug, Default, Clone)]
pub(crate) struct Hasher128<const SEP: u8> {
    hasher: Shake128,
}

pub(crate) struct Hasher128Reader(Shake128Reader);

impl Reader for Hasher128Reader {
    fn read(&mut self, dst: &mut [u8]) {
        self.0.read(dst);
    }
}

impl RandomOracle for RandomOracleShake128 {
    type Hasher<const SEP: u8> = Hasher128<SEP>;
}

impl<const SEP: u8> Hasher for Hasher128<SEP> {
    type Reader = Hasher128Reader;

    fn update(&mut self, data: &[u8]) {
        self.hasher.update(data);
    }

    fn finish(mut self) -> Self::Reader {
        self.hasher.update(&[SEP]);
        Hasher128Reader(self.hasher.finalize_xof())
    }
}

impl<const SEP: u8> Hasher for Hasher256<SEP> {
    type Reader = Hasher256Reader;

    fn update(&mut self, data: &[u8]) {
        self.hasher.update(data);
    }

    fn finish(mut self) -> Self::Reader {
        self.hasher.update(&[SEP]);
        Hasher256Reader(self.hasher.finalize_xof())
    }
}

pub(crate) struct RandomOracleShake256 {}

/// Hasher based on SHAKE256
#[derive(Debug, Default, Clone)]
pub(crate) struct Hasher256<const SEP: u8> {
    hasher: Shake256,
}

pub(crate) struct Hasher256Reader(Shake256Reader);

impl Reader for Hasher256Reader {
    fn read(&mut self, dst: &mut [u8]) {
        self.0.read(dst);
    }
}

impl RandomOracle for RandomOracleShake256 {
    type Hasher<const SEP: u8> = Hasher256<SEP>;
}

#[cfg(test)]
mod test {
    use super::*;

    #[cfg(not(feature = "std"))]
    use alloc::vec;

    fn verify(mut hasher: impl Hasher, input: &[u8], output: &[u8]) {
        hasher.update(input);
        let mut reader = hasher.finish();
        let mut res = vec![0; output.len()];
        reader.read(&mut res);
        assert_eq!(res, output);
    }

    #[test]
    fn test_h0_128() {
        let input = [
            0xe1, 0x52, 0x3a, 0x89, 0x80, 0xc1, 0x62, 0x83, 0xcb, 0xc8, 0x5e, 0x71, 0x70, 0x3a,
            0x04, 0xd1,
        ];
        let output = [
            0xcb, 0xbf, 0x57, 0xa9, 0x0b, 0x61, 0x87, 0x53, 0xc6, 0x97, 0x04, 0x23, 0xe7, 0x0c,
            0x5f, 0x23, 0x06, 0x07, 0xfe, 0x36, 0x71, 0x99, 0xe5, 0x2a, 0x87, 0x5d, 0x50, 0x69,
            0x74, 0xb3, 0x2b, 0xda, 0x4b, 0xca, 0x01, 0xfc, 0x29, 0x60, 0x18, 0xd6, 0xf1, 0x14,
            0x6d, 0x59, 0x47, 0x4b, 0x79, 0x43,
        ];

        let hasher = RandomOracleShake128::h0_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h0_256() {
        let input = [
            0xd7, 0xfc, 0xc8, 0xac, 0x79, 0x23, 0xae, 0x97, 0x1b, 0x08, 0xc7, 0xa2, 0xfc, 0x1f,
            0x0a, 0x81,
        ];
        let output = [
            0xaa, 0x9d, 0x0a, 0xb0, 0x35, 0x9d, 0x51, 0xd9, 0xea, 0x43, 0x03, 0xe8, 0x49, 0xf5,
            0xa3, 0xb7, 0x63, 0xb0, 0xb7, 0xe5, 0xf4, 0xf4, 0x70, 0x06, 0xa8, 0x6b, 0x93, 0x76,
            0xa0, 0x5b, 0x82, 0xda, 0x65, 0x1e, 0xb2, 0x5a, 0xa7, 0xd9, 0x3a, 0x12, 0x44, 0x58,
            0x69, 0x94, 0x9c, 0xd4, 0x42, 0x81, 0x38, 0xa2, 0x18, 0x99, 0xc0, 0x59, 0xc2, 0x0b,
            0x4d, 0x35, 0x6e, 0x38, 0xae, 0x83, 0x48, 0x40, 0xfe, 0x47, 0x00, 0x2f, 0x91, 0xf3,
            0x44, 0x2f, 0x5a, 0x32, 0x9a, 0x26, 0x2e, 0x5b, 0x50, 0xab, 0x97, 0xfe, 0xd4, 0x57,
            0x8c, 0x00, 0xed, 0x7f, 0x3b, 0xe7, 0xfb, 0xb9, 0x10, 0xde, 0x8f, 0x0c,
        ];

        let hasher = RandomOracleShake256::h0_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h1_128() {
        let input = [
            0xd2, 0x33, 0x1c, 0x8b, 0xd9, 0x1b, 0x1e, 0x01, 0x56, 0x59, 0x09, 0x44, 0x47, 0x2d,
            0x2d, 0xd3,
        ];
        let output = [
            0x93, 0xe3, 0x5f, 0xee, 0x73, 0x82, 0xc6, 0xce, 0x22, 0xe9, 0x34, 0x49, 0x4a, 0xbf,
            0x2c, 0x90, 0x1c, 0x58, 0xb5, 0x1a, 0xa3, 0x40, 0x24, 0x24, 0xd2, 0x7d, 0xa5, 0x8e,
            0x5c, 0x4f, 0xdd, 0xd9,
        ];

        let hasher = RandomOracleShake128::h1_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h1_256() {
        let input = [
            0xd5, 0xb2, 0x51, 0x15, 0xaa, 0x4c, 0x5b, 0x3c, 0x1a, 0x96, 0x20, 0x95, 0xcd, 0xdb,
            0x31, 0xba,
        ];
        let output = [
            0x89, 0x7e, 0x86, 0xb9, 0x69, 0x7f, 0x4c, 0x2d, 0x6b, 0x26, 0x76, 0x71, 0xf2, 0x43,
            0x19, 0x57, 0x01, 0x27, 0x16, 0x2b, 0x3b, 0xd5, 0xf5, 0x6d, 0x30, 0x49, 0xc4, 0x5c,
            0x02, 0x42, 0x0b, 0xd0, 0x56, 0xbe, 0x22, 0xf4, 0xa0, 0x56, 0xd4, 0xa5, 0x1f, 0xb1,
            0xe8, 0x25, 0x53, 0x43, 0x13, 0x7e, 0xe4, 0x5f, 0x12, 0xc7, 0x34, 0x77, 0x4a, 0x4c,
            0xbc, 0xe7, 0x35, 0xd0, 0xb6, 0x74, 0x6d, 0x01,
        ];

        let hasher = RandomOracleShake256::h1_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h2_0_128() {
        let input = [
            0x46, 0x2c, 0x15, 0x0b, 0x96, 0xcb, 0x0e, 0xc4, 0x07, 0x1a, 0x05, 0x46, 0x74, 0xcd,
            0x35, 0x2e, 0xd4, 0xda, 0x35, 0x33, 0x8b, 0xea, 0x59, 0xad, 0x66, 0x06, 0x08, 0xc1,
            0x2f, 0x86, 0xe8, 0xeb, 0x59, 0x47, 0x75, 0xa7, 0x31, 0xdf, 0x92, 0x8c, 0x81, 0x9b,
            0x2d, 0x2a, 0xe2, 0xd8, 0x95, 0x9c,
        ];
        let output = [
            0x8a, 0xf9, 0x90, 0xd0, 0x3e, 0xcd, 0xc1, 0x0e, 0xbf, 0x71, 0x16, 0x9f, 0x2e, 0x2d,
            0x1d, 0xa7, 0xcb, 0x66, 0x1a, 0x44, 0xc9, 0x38, 0xc7, 0xcd, 0x01, 0x1a, 0x2a, 0x21,
            0x3f, 0xb6, 0xbd, 0x52,
        ];

        let hasher = RandomOracleShake128::h2_0_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h2_0_256() {
        let input = [
            0xc0, 0x84, 0xc7, 0xfd, 0xf5, 0x98, 0x10, 0x76, 0xac, 0x49, 0xfa, 0x76, 0xb1, 0xb6,
            0x28, 0x15, 0xb9, 0xce, 0xb2, 0xc6, 0xd8, 0x54, 0x6a, 0xcf, 0x26, 0x75, 0x79, 0x7e,
            0xdb, 0xc7, 0xc2, 0x57, 0xe5, 0xca, 0xea, 0x36, 0x99, 0xe1, 0xe7, 0x98, 0xbf, 0x7d,
            0xc8, 0x1c, 0x1d, 0x89, 0x10, 0x29, 0xe6, 0x28, 0xe7, 0x77, 0x13, 0xa1, 0xd3, 0xe9,
            0xa9, 0xad, 0x82, 0x6c, 0xff, 0x77, 0x21, 0x2b, 0xb2, 0x7b, 0x5a, 0xf4, 0x89, 0x36,
            0x8f, 0x32, 0xf5, 0x7a, 0xe9, 0xd1, 0x0c, 0xfc, 0x2d, 0xec, 0x7b, 0x97, 0x0e, 0x06,
            0x3f, 0x85, 0xdd, 0x46, 0x66, 0x39, 0xfc, 0x80, 0x07, 0x4c, 0x19, 0x4b,
        ];
        let output = [
            0xa2, 0xe0, 0x31, 0xd8, 0xc4, 0xe6, 0xc6, 0x4b, 0xff, 0x74, 0xa7, 0x37, 0xe3, 0x3b,
            0x82, 0xdf, 0xf2, 0x06, 0xce, 0x82, 0x59, 0xda, 0xd2, 0x0b, 0xda, 0x68, 0xbb, 0xe1,
            0xb0, 0x59, 0xc2, 0x69, 0x82, 0xa9, 0xfe, 0xa8, 0x84, 0xb0, 0x0d, 0x0e, 0x34, 0xe9,
            0xaa, 0xa1, 0xcc, 0x20, 0x85, 0x6d, 0x70, 0xfa, 0x60, 0xc8, 0x3a, 0x25, 0x87, 0xcc,
            0x68, 0x94, 0xf0, 0x18, 0x94, 0x50, 0xec, 0xa5,
        ];

        let hasher = RandomOracleShake256::h2_0_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h2_1_128() {
        let input = [
            0x2a, 0x52, 0xca, 0x6f, 0x92, 0xb7, 0xb1, 0x8e, 0x4c, 0x58, 0x01, 0xda, 0x83, 0xd0,
            0x6d, 0x44, 0x1a, 0x84, 0x89, 0xec, 0xb9, 0xb9, 0xe0, 0xb0, 0xd2, 0xe1, 0x15, 0x79,
            0x77, 0x10, 0x74, 0xf1, 0xab, 0x33, 0x81, 0x46, 0x57, 0xc2, 0xb4, 0x39, 0x53, 0x43,
            0xf1, 0x42, 0x9a, 0xe5, 0xf2, 0x87, 0x70, 0x99, 0x40, 0xc3, 0x2d, 0x74, 0x72, 0x49,
            0x8d, 0x3e, 0x71, 0xc7, 0xa6, 0x5b, 0x6d, 0x52, 0xff, 0x54, 0x3c, 0xf8, 0xe5, 0x33,
            0x41, 0xe5, 0x59, 0x06, 0xea, 0x2c, 0xcd, 0x96, 0x08, 0x2f, 0x54, 0x2f, 0xe8, 0xb2,
            0x31, 0x46, 0x4d, 0x83, 0xb8, 0x86, 0xa2, 0xf1, 0x6d, 0xa8, 0xce, 0xe0,
        ];
        let output = [
            0xf1, 0xd0, 0x11, 0x0e, 0xfc, 0x8e, 0x48, 0x32, 0x31, 0xd2, 0xb2, 0x82, 0x73, 0x1f,
            0xee, 0x4e, 0x36, 0xa7, 0x69, 0xbd, 0x5b, 0x41, 0x43, 0xdc, 0xce, 0x73, 0x0d, 0xfc,
            0xa4, 0x38, 0x63, 0x25, 0xc9, 0x1a, 0x82, 0x71, 0x9d, 0x1b, 0x2c, 0xb0, 0x11, 0xb8,
            0x93, 0xab, 0xa9, 0x44, 0x8b, 0x1d, 0xd7, 0x91, 0x48, 0xba, 0xfd, 0xcf, 0xc6, 0x9d,
            0x26, 0x94, 0x33, 0x8b, 0xd2, 0x2a, 0xd1, 0x16, 0xc4, 0xe2, 0x46, 0x99, 0x4b, 0x2d,
            0xde, 0x0b, 0x5f, 0x57, 0x24, 0xf8, 0x79, 0x6b, 0xf1, 0x50, 0x8b, 0x03, 0x8f, 0x37,
            0x67, 0xc4, 0x71, 0x51,
        ];

        let hasher = RandomOracleShake128::h2_1_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h2_1_256() {
        let input = [
            0xbf, 0xbb, 0x6c, 0x34, 0xe9, 0xc8, 0xd6, 0xa4, 0xa9, 0xc9, 0x06, 0x4e, 0x9f, 0x17,
            0xa0, 0x1a, 0xdb, 0xbc, 0x39, 0xc1, 0xa5, 0xee, 0xd8, 0x83, 0xb1, 0x93, 0x2d, 0xe2,
            0xa9, 0xfe, 0xec, 0x28, 0xf6, 0x73, 0x7b, 0x30, 0x90, 0xce, 0x01, 0x20, 0x46, 0xb4,
            0x8e, 0xe9, 0xe0, 0x77, 0xe8, 0xe7, 0xa7, 0xf1, 0x94, 0x92, 0x81, 0x7a, 0xe7, 0x80,
            0x3a, 0x40, 0x1e, 0x6d, 0x0a, 0x20, 0xcd, 0xac, 0x44, 0x3f, 0xb1, 0xea, 0x2e, 0x3e,
            0x6d, 0xce, 0xd3, 0xf8, 0xbf, 0x28, 0x60, 0x25, 0xd7, 0xe5, 0xa5, 0xcb, 0x28, 0x5e,
            0x2f, 0x91, 0x32, 0xa8, 0x5e, 0x33, 0x07, 0x13, 0x0f, 0x26, 0x23, 0x63, 0xdb, 0xd5,
            0xfd, 0xc2, 0x58, 0xd8, 0x6d, 0x9a, 0x8e, 0x4f, 0xcc, 0x70, 0x7c, 0x91, 0xc9, 0x49,
            0xf7, 0xad, 0x9c, 0xd8, 0x52, 0xfe, 0x68, 0xc9, 0xc0, 0xe7, 0xb4, 0x41, 0x80, 0x60,
            0xe0, 0x54, 0x2d, 0x2e, 0xb2, 0x6b, 0x72, 0x3d, 0x5a, 0x3d, 0x2a, 0xb6, 0xd2, 0xa1,
            0xaf, 0xff, 0x06, 0xc6, 0x09, 0x87, 0xe4, 0x3c, 0x43, 0x0c, 0x61, 0xf0, 0xbb, 0x24,
            0x1e, 0x6f, 0x22, 0x32, 0xed, 0x61, 0x1f, 0xee, 0x05, 0x1b, 0xad, 0xfc, 0x5e, 0xec,
            0x14, 0x26, 0xdd, 0x72, 0x99, 0x7a, 0x59, 0xeb,
        ];
        let output = [
            0x60, 0x7e, 0x4e, 0x0e, 0x32, 0x3a, 0x4f, 0xc2, 0x3a, 0xd9, 0x23, 0xab, 0x6c, 0x80,
            0xc0, 0xb0, 0x6e, 0x53, 0xeb, 0x70, 0x46, 0x64, 0x8c, 0xc0, 0xe9, 0x44, 0x4c, 0x84,
            0x3e, 0x7e, 0x8a, 0x94, 0x84, 0x31, 0x6f, 0xa9, 0xcd, 0x89, 0xb2, 0x98, 0x25, 0xf0,
            0x71, 0x78, 0x18, 0xe5, 0x93, 0x44, 0x74, 0x3f, 0x3c, 0xdc, 0x8a, 0xab, 0xfa, 0x12,
            0x92, 0x60, 0x0f, 0xa9, 0x0c, 0x8d, 0x39, 0x38, 0x53, 0x26, 0xd7, 0x6e, 0x9c, 0x41,
            0x97, 0x89, 0x33, 0x73, 0x34, 0x47, 0xf6, 0xb9, 0x51, 0xb7, 0x7d, 0xd8, 0x89, 0x9f,
            0x91, 0x3e, 0x63, 0x41, 0x84, 0x95, 0xe2, 0x01, 0xd5, 0x81, 0xd9, 0xe8, 0x99, 0x7b,
            0xc4, 0x70, 0xf5, 0xc3, 0x7e, 0x33, 0x11, 0xb3, 0x61, 0x42, 0xe6, 0x13, 0x72, 0x21,
            0x8f, 0x52, 0xe6, 0x20, 0xb0, 0xd9, 0x90, 0x30, 0x5f, 0x6f, 0xba, 0x9d, 0x71, 0xe5,
            0x6d, 0x3b, 0xca, 0x67, 0x8f, 0xdf, 0x9d, 0xfd, 0x2e, 0xf9, 0x38, 0x35, 0x9e, 0x4a,
            0xe9, 0x3c, 0x4d, 0x07, 0xf7, 0x94, 0x3c, 0xda, 0x18, 0x7f, 0xb9, 0x0b, 0x91, 0xb4,
            0xb9, 0x81, 0x4a, 0x53, 0xef, 0x80, 0xc2, 0x55, 0x19, 0xc7, 0x03, 0x06, 0x37, 0x70,
        ];

        let hasher = RandomOracleShake256::h2_1_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h2_2_128() {
        let input = [
            0x61, 0xcf, 0xa6, 0x5d, 0x01, 0x6d, 0xa4, 0x5b, 0x95, 0xba, 0x06, 0x97, 0xf0, 0xa1,
            0xb7, 0x36, 0x09, 0x9a, 0x50, 0xb6, 0xf2, 0x19, 0xab, 0xab, 0xdc, 0x45, 0x3c, 0x2e,
            0x2a, 0xae, 0xd1, 0xe1, 0x02, 0xdd, 0xa9, 0x72, 0xbe, 0xbc, 0x85, 0xed, 0x38, 0xe8,
            0x9b, 0x68, 0x7c, 0x74, 0x50, 0x5e, 0x15, 0x83, 0x3a, 0x73, 0x12, 0x07, 0x9f, 0x77,
            0xb1, 0x77, 0x06, 0x1e, 0x0c, 0x9b, 0x54, 0x6a, 0x10, 0xd3, 0x3e, 0xb0, 0x9a, 0xbc,
            0x41, 0x8a, 0x73, 0x79, 0x87, 0x40, 0x42, 0x84, 0xea, 0x0d, 0x08, 0x0b, 0x79, 0x40,
            0xd9, 0x13, 0x91, 0x3b, 0x1d, 0x59, 0xf3, 0x66, 0x1e, 0xe3, 0xbe, 0x75, 0xe5, 0xfb,
            0x28, 0xec, 0x8f, 0x59, 0x44, 0x26, 0x74, 0x47, 0xc3, 0xa4, 0x3d, 0xf5, 0x2b, 0xa3,
            0x47, 0x42, 0x72, 0x18, 0x7b, 0x21, 0x7d, 0xfd, 0x68, 0xda, 0x72, 0x44, 0xd0, 0x29,
            0x06, 0xd0,
        ];
        let output = [
            0x24, 0x1e, 0x1e, 0x89, 0x24, 0xa9, 0x69, 0xc6, 0xa5, 0x05, 0x01, 0x25, 0x32, 0xe1,
            0xce, 0xeb, 0xc6, 0x56, 0x61, 0x8b, 0x8d, 0x41, 0x7d, 0xa2, 0x09, 0xc2, 0x20, 0xfc,
            0x6c, 0x75, 0xac, 0xaf, 0x06, 0x66, 0x71, 0xe3, 0xd9, 0xd3, 0xbc, 0xed, 0xef, 0x45,
            0x9e, 0x23, 0x44, 0x15, 0x64, 0xa2, 0x4e, 0xb7, 0x39, 0xa6, 0xe0, 0x49, 0xda, 0x6b,
        ];

        let hasher = RandomOracleShake128::h2_2_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h2_2_256() {
        let input = [
            0x52, 0x20, 0x08, 0x66, 0xe1, 0x1b, 0x7a, 0xe3, 0x0d, 0xc8, 0xa1, 0xf2, 0x86, 0xbf,
            0x94, 0xa5, 0x77, 0x3f, 0xce, 0xff, 0x71, 0x78, 0xcd, 0x66, 0x1d, 0x95, 0x75, 0x1f,
            0xaa, 0x07, 0x3b, 0x30, 0x75, 0x4d, 0xdb, 0xc4, 0x8d, 0x9e, 0xbe, 0xc4, 0xca, 0xd2,
            0xed, 0x91, 0xa9, 0xff, 0x60, 0x65, 0x2d, 0x2d, 0x08, 0x02, 0x74, 0xf9, 0xd7, 0xd7,
            0xfd, 0xa8, 0x5f, 0x81, 0xbb, 0x4f, 0xd3, 0x8a, 0x4f, 0xbf, 0x32, 0x9b, 0x95, 0x21,
            0xeb, 0x0c, 0x02, 0xe3, 0x84, 0xe1, 0x7b, 0x2f, 0x8d, 0x40, 0x48, 0xe4, 0xea, 0x12,
            0x1c, 0x62, 0x6b, 0x1c, 0x86, 0x08, 0x2f, 0x36, 0x81, 0x81, 0x06, 0xc5, 0x3e, 0x0b,
            0x76, 0xab, 0x08, 0x45, 0x47, 0xf1, 0xe9, 0xf7, 0xa4, 0x48, 0xd5, 0xda, 0xff, 0x21,
            0xea, 0x6c, 0x18, 0x4e, 0x86, 0xe3, 0x35, 0x85, 0x2e, 0x62, 0xd6, 0xb9, 0x15, 0x82,
            0xd3, 0xf3, 0x0a, 0x38, 0xe2, 0x63, 0x35, 0x81, 0xc0, 0x11, 0x94, 0x20, 0x2f, 0x73,
            0xe6, 0x20, 0xbf, 0x32, 0xd4, 0x03, 0x93, 0xe7, 0xbc, 0xa7, 0x54, 0xa1, 0x9a, 0x5e,
            0x10, 0x24, 0x32, 0xc7, 0x76, 0xd6, 0x89, 0xad, 0x93, 0x96, 0xc8, 0xc1, 0xe4, 0x91,
            0x0b, 0x15, 0xf6, 0x63, 0x6a, 0x24, 0xf4, 0xbd, 0x56, 0xa3, 0x70, 0xf3, 0x06, 0xcc,
            0xe7, 0xf4, 0x24, 0xdd, 0xa1, 0x6b, 0xa6, 0x0a, 0x84, 0x0b, 0x9a, 0xf9, 0xaa, 0xf8,
            0xb7, 0xf6, 0xd0, 0x59, 0xc9, 0x87, 0x61, 0x75, 0x45, 0xae, 0x61, 0x63, 0x39, 0x23,
            0xfe, 0x86, 0xa4, 0x02, 0xf6, 0x64, 0x2b, 0xb1, 0xf9, 0x7c, 0x5f, 0x97, 0x9a, 0x72,
            0xb1, 0xee, 0x39, 0xbe, 0x4e, 0x78, 0x22, 0xee, 0x4a, 0x21, 0x0f, 0xff, 0x59, 0x26,
            0xe7, 0x61, 0x17, 0x4f, 0x21, 0x09, 0xfe, 0x97, 0xfa, 0x45, 0x25, 0xac, 0xfc, 0x64,
            0xf1, 0x6a, 0xe6, 0xbf,
        ];
        let output = [
            0x0f, 0x03, 0xc0, 0xe7, 0x61, 0x79, 0x3e, 0xf2, 0x5c, 0x6b, 0x33, 0xbe, 0x8d, 0x42,
            0x47, 0x70, 0x80, 0xac, 0x0d, 0x50, 0x55, 0xc6, 0x70, 0xd6, 0xb7, 0x8e, 0x81, 0x85,
            0x10, 0xb6, 0xa2, 0x00, 0xb5, 0x6c, 0x02, 0x67, 0x3f, 0x8a, 0xb7, 0x29, 0x62, 0x95,
            0xa1, 0xb7, 0xc0, 0xd0, 0x29, 0x6e, 0x41, 0x16, 0x47, 0xf7, 0x70, 0xbc, 0x32, 0xa7,
            0xce, 0xbb, 0x7f, 0x6f, 0xad, 0x2c, 0x92, 0x07, 0x4c, 0x32, 0xf8, 0x65, 0x57, 0x52,
            0x5a, 0x31, 0x9f, 0x32, 0xf6, 0x38, 0x58, 0x6a, 0x6c, 0x94, 0x8c, 0xa8, 0xf6, 0xa0,
            0x2f, 0x9e, 0x8e, 0xd5, 0x1b, 0x17, 0x1c, 0x22, 0x8d, 0x49, 0x8f, 0x8f, 0x46, 0xab,
            0xb0, 0x24, 0xc5, 0xb5, 0xa6, 0xb8,
        ];

        let hasher = RandomOracleShake256::h2_2_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h2_3_128() {
        let input = [
            0x10, 0xf0, 0xca, 0x30, 0xbe, 0x9c, 0x04, 0xa8, 0x7d, 0xb4, 0xd9, 0xe8, 0xab, 0xac,
            0xa2, 0xa3, 0x9c, 0x66, 0xe3, 0xf8, 0x77, 0x45, 0x51, 0x50, 0xc7, 0xb7, 0xc3, 0x39,
            0x06, 0x6c, 0xf7, 0xf9, 0x08, 0x7d, 0xf2, 0x95, 0xb2, 0x0c, 0x14, 0xb0, 0x50, 0x7b,
            0x07, 0xc9, 0xba, 0x32, 0xb9, 0xc1, 0xe0, 0xd3, 0x95, 0x67, 0xc3, 0xb1, 0xde, 0x56,
            0xa0, 0x1d, 0x1e, 0xb8, 0x39, 0xc4, 0xfa, 0x16, 0xef, 0x16, 0xc8, 0x72, 0x89, 0xc7,
            0xdd, 0x28, 0x00, 0x62, 0x1f, 0x3d, 0x4c, 0x4a, 0x3a, 0x54, 0x22, 0xe1, 0xc1, 0x9e,
            0xb6, 0xec, 0xa3, 0xb8, 0xc8, 0x9d, 0x42, 0x93, 0x0f, 0x67, 0x09, 0x38, 0xeb, 0x5d,
            0x6a, 0xa9, 0x44, 0x64, 0xe4, 0x50, 0xb7, 0x71, 0x7c, 0xa0,
        ];
        let output = [
            0x37, 0xfd, 0x54, 0xb1, 0x3b, 0x2b, 0xe1, 0xaf, 0xe1, 0x31, 0x42, 0x0e, 0x0c, 0x07,
            0xd8, 0xad,
        ];

        let hasher = RandomOracleShake128::h2_3_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h2_3_256() {
        let input = [
            0x0a, 0xe0, 0xd7, 0xbe, 0xd3, 0xb7, 0x5d, 0x3d, 0xc4, 0xcd, 0xad, 0xb5, 0xdb, 0xaf,
            0x4f, 0x13, 0x2d, 0xd8, 0x20, 0x1d, 0xd7, 0xe7, 0xce, 0x69, 0x0d, 0x25, 0xf8, 0x12,
            0x43, 0xfa, 0x74, 0x27, 0xbd, 0x3f, 0x55, 0x91, 0xe3, 0xeb, 0x9f, 0x21, 0xc6, 0xbe,
            0xbe, 0x09, 0x91, 0x03, 0x75, 0xf4, 0x42, 0x63, 0xfe, 0x0a, 0xa8, 0x57, 0xe1, 0x61,
            0xdd, 0xb7, 0x1d, 0x38, 0xcc, 0x9e, 0x5a, 0xef, 0x2e, 0x95, 0xff, 0x93, 0x8e, 0x72,
            0x26, 0x7f, 0x85, 0x1f, 0x24, 0x2a, 0xbc, 0x1a, 0x43, 0xc6, 0x3d, 0x1d, 0x3e, 0xc9,
            0xf0, 0x8c, 0xad, 0xb2, 0x7d, 0x7d, 0x8c, 0x33, 0x2d, 0x3d, 0xe4, 0xed, 0xaf, 0x48,
            0x62, 0x0f, 0x7e, 0xd5, 0x29, 0x6b, 0x67, 0x2d, 0xa1, 0x8d, 0x10, 0x3a, 0x81, 0xf2,
            0xc4, 0xb5, 0x0b, 0x0f, 0xa8, 0xa9, 0x0d, 0xa1, 0x48, 0x3c, 0x67, 0xc0, 0x4c, 0x9d,
            0x1f, 0xfa, 0x39, 0x1c, 0x48, 0xba, 0xe3, 0xa5, 0x34, 0xf9, 0x89, 0xe0, 0x72, 0x33,
            0x67, 0x99, 0x6d, 0x3a, 0x76, 0xe5, 0xaf, 0xc5, 0xa2, 0x35, 0x1e, 0xcb, 0x5c, 0x47,
            0xc8, 0x7a, 0x2f, 0x33, 0x4b, 0x2c, 0x91, 0x36, 0x3d, 0xfb, 0xb1, 0x7f, 0xf9, 0xe4,
            0x12, 0x2f, 0x02, 0xb8, 0x3f, 0xb9, 0xe6, 0x69, 0xc6, 0xa4, 0xcd, 0x2e, 0xca, 0x29,
            0x99, 0xcd, 0x17, 0xff, 0xbb, 0xdc, 0x7d, 0x53, 0x4b, 0xf9, 0x56, 0xc6, 0xa7, 0x1d,
            0x90, 0xdd, 0xa9, 0xf2, 0xda, 0x98, 0xf6, 0xac,
        ];
        let output = [
            0x76, 0x38, 0x46, 0x6e, 0xb5, 0xad, 0xf5, 0xf2, 0xed, 0x55, 0x67, 0x09, 0xa7, 0xa2,
            0x7c, 0x22, 0xcb, 0xe6, 0x92, 0x61, 0x8c, 0x47, 0x43, 0x9f, 0x62, 0x9a, 0x75, 0xcc,
            0x3d, 0x07, 0xe2, 0x18,
        ];

        let hasher = RandomOracleShake256::h2_3_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h3_128() {
        let input = [
            0x56, 0xb7, 0xfc, 0xbb, 0x3f, 0xa1, 0x2b, 0xc2, 0x67, 0xec, 0x1d, 0x42, 0x9a, 0xf8,
            0x2d, 0xdf, 0xf0, 0x94, 0x74, 0xb7, 0x06, 0x57, 0xcf, 0x61, 0xcb, 0x68, 0xec, 0x70,
            0x13, 0xf0, 0x52, 0x00, 0x7f, 0xb9, 0xeb, 0xd7, 0x24, 0xd1, 0xc6, 0xc9, 0x88, 0x6a,
            0x8e, 0xed, 0x45, 0xcd, 0x66, 0x7e, 0xb5, 0x9b, 0xa4, 0xac, 0x91, 0xb9, 0x89, 0x78,
            0xf7, 0xab, 0x54, 0x13, 0x30, 0xe6, 0x3d, 0x47,
        ];
        let output = [
            0xfb, 0xf3, 0xbe, 0xc0, 0x9d, 0x99, 0x68, 0x17, 0x4c, 0x85, 0x92, 0x47, 0xbe, 0x3f,
            0x60, 0xb9, 0x97, 0x1e, 0xa8, 0x29, 0x32, 0xea, 0xae, 0x36, 0x2e, 0xb6, 0xe9, 0x7d,
            0xb6, 0xbd, 0x5d, 0x3a,
        ];

        let hasher = RandomOracleShake128::h3_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h3_256() {
        let input = [
            0x6f, 0x35, 0xd9, 0x66, 0xa9, 0x79, 0x23, 0x24, 0xc7, 0xfb, 0x72, 0xc8, 0x9a, 0x11,
            0x78, 0x02, 0x67, 0xf6, 0xb1, 0x3c, 0xca, 0x50, 0x11, 0x54, 0xc1, 0xb7, 0x37, 0x6f,
            0x2f, 0x83, 0x32, 0x53, 0xd6, 0xfc, 0x05, 0x28, 0xdc, 0x10, 0x4a, 0x11, 0x21, 0xca,
            0xf3, 0xd2, 0xe6, 0x40, 0x1b, 0x0c, 0x0f, 0x49, 0x21, 0x63, 0xe9, 0x9e, 0xef, 0x40,
            0xe7, 0x2c, 0x18, 0x1c, 0xc8, 0x65, 0x10, 0x40, 0xcc, 0xdc, 0xb6, 0xb4, 0x48, 0xaa,
            0xb4, 0xe6, 0x40, 0x82, 0xe5, 0x2f, 0x75, 0xf6, 0xed, 0x10, 0x96, 0x6a, 0x21, 0x56,
            0x1c, 0x5e, 0x64, 0x2a, 0x1b, 0x55, 0x68, 0xc0, 0x2c, 0xc6, 0xde, 0x59, 0x09, 0x5c,
            0xa4, 0x54, 0x67, 0x8c, 0x4c, 0x7d, 0x44, 0x36, 0x41, 0x46, 0xa1, 0xa0, 0x4d, 0x91,
            0x2d, 0xf9, 0x1e, 0xd2, 0xb5, 0xbd, 0x9e, 0x8a, 0x3a, 0x69, 0x5c, 0x44, 0x8d, 0xfe,
            0xad, 0x5d,
        ];
        let output = [
            0x73, 0xe9, 0xb5, 0x90, 0x33, 0x13, 0x07, 0x21, 0x43, 0xec, 0xb7, 0x63, 0x52, 0x69,
            0x0e, 0x33, 0x14, 0xa7, 0xf8, 0xca, 0x84, 0x85, 0x76, 0x7b, 0xae, 0x11, 0xdc, 0x24,
            0x4d, 0x2d, 0x7d, 0x6b, 0x84, 0x2e, 0xa9, 0xef, 0xcd, 0x65, 0x60, 0xc3, 0x1c, 0x0f,
            0x10, 0x05, 0x99, 0xb7, 0x04, 0x09,
        ];

        let hasher = RandomOracleShake256::h3_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h4_128() {
        let input = [
            0x51, 0xa0, 0x92, 0xff, 0xdc, 0x6a, 0xb1, 0x00, 0x4d, 0xc0, 0xe4, 0xa1, 0x14, 0x7f,
            0x47, 0x6a,
        ];
        let output = [
            0xe4, 0x4e, 0x9d, 0xb8, 0xaa, 0x34, 0xfe, 0xc3, 0x1b, 0x39, 0xe1, 0xae, 0x22, 0x29,
            0x75, 0x70,
        ];

        let hasher = RandomOracleShake128::h4_init();
        verify(hasher, &input, &output);
    }

    #[test]
    fn test_h4_256() {
        let input = [
            0xb2, 0xe7, 0x47, 0x98, 0x5d, 0x6e, 0x18, 0x40, 0x49, 0xc1, 0xc3, 0xad, 0x4a, 0xa0,
            0x5e, 0x8b,
        ];
        let output = [
            0x68, 0x82, 0xf5, 0x3c, 0xab, 0x68, 0x8e, 0xb6, 0x12, 0xa6, 0xa8, 0x94, 0xe9, 0x12,
            0x61, 0x4d,
        ];

        let hasher = RandomOracleShake256::h4_init();
        verify(hasher, &input, &output);
    }
}