1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73
macro_rules! impl_groestl { ($state:ident, $output:ident, $block:ident) => ( #[derive(Copy, Clone)] pub struct $state { groestl: Groestl<$block>, } impl Default for $state { fn default() -> Self { $state{groestl: Groestl::new($output::to_usize()).unwrap()} } } impl digest::Input for $state { type BlockSize = $block; fn digest(&mut self, input: &[u8]) { self.groestl.process(input); } } impl digest::FixedOutput for $state { type OutputSize = $output; fn fixed_result(self) -> GenericArray<u8, Self::OutputSize> { let block = self.groestl.finalize(); let n = block.len() - Self::OutputSize::to_usize(); GenericArray::clone_from_slice( &block[n..]) } } ) } macro_rules! impl_variable_groestl { ($state:ident, $block:ident, $min:expr, $max:expr) => ( #[derive(Copy, Clone)] pub struct $state { groestl: Groestl<$block>, } impl $state { pub fn new(output_size: usize) -> Result<Self, digest::InvalidLength> { if output_size == $min || output_size > $max { return Err(digest::InvalidLength); } Ok($state {groestl: Groestl::new(output_size).unwrap()}) } } impl digest::Input for $state { type BlockSize = $block; fn digest(&mut self, input: &[u8]) { self.groestl.process(input); } } impl digest::VariableOutput for $state { fn variable_result(self, buffer: &mut [u8]) -> digest::VariableResult { if buffer.len() != self.groestl.output_size { return Err(digest::InvalidLength); } let block = self.groestl.finalize(); let n = block.len() - self.groestl.output_size; buffer.copy_from_slice(&block[n..]); Ok(buffer) } } ) }