fuzztarget sha -> XOR, crates secp256k1

[rust-lightning] / src / util / sha2.rs

diff --git a/src/util/sha2.rs b/src/util/sha2.rs
index 31616f507d66c9fd50d7484e2a5581597129f79a..2c9eab9321c92f7b2c04d1c083bded3b62c78089 100644 (file)
--- a/src/util/sha2.rs
+++ b/src/util/sha2.rs
@@ -4,33 +4,31 @@ pub use crypto::sha2::Sha256;
 #[cfg(feature = "fuzztarget")]
 mod fuzzy_sha {
        use crypto::digest::Digest;
-       use crypto::sha2;
 
-       #[derive(Clone, Copy)]
        pub struct Sha256 {
-               state: sha2::Sha256,
+               state: u8,
        }
 
        impl Sha256 {
                pub fn new() -> Sha256 {
                        Sha256 {
-                               state: sha2::Sha256::new(),
+                               state: 0,
                        }
                }
        }
 
        impl Digest for Sha256 {
                fn result(&mut self, data: &mut [u8]) {
-                       self.state.result(data);
+                       data[0] = self.state;
                        for i in 1..32 {
                                data[i] = 0;
                        }
                }
 
-               fn input(&mut self, data: &[u8]) { self.state.input(data); }
-               fn reset(&mut self) { self.state.reset(); }
-               fn output_bits(&self) -> usize { self.state.output_bits() }
-               fn block_size(&self) -> usize { self.state.block_size() }
+               fn input(&mut self, data: &[u8]) { for i in data { self.state ^= i; } }
+               fn reset(&mut self) { self.state = 0; }
+               fn output_bits(&self) -> usize { 256 }
+               fn block_size(&self) -> usize { 64 }
        }
 }
 #[cfg(feature = "fuzztarget")]