implementation of md6 in pure rust

md6/src/consts.rs

@@ -10,42 +10,28 @@ pub const MD6_MAX_R: usize = 255;
 /// Large so that MD6 is fully hierarchical
 pub const MD6_DEFAULT_L: usize = 64;
 
-/// Number of bits in a word
-pub const MD6_W: usize = 64;
-/// Size of compression output in words
-pub const MD6_C: usize = 16;
-/// Size of compression input block in words
-pub const MD6_N: usize = 89;
-
-// These five values give lengths of the components of compression
-// input block; they should sum to MD6_N.
-/// Q words in a compression block (>= 0)
-pub const MD6_Q: usize = 15;
-/// Key words per compression block (>= 0)
-pub const MD6_K: usize = 8;
-/// Words for unique node ID (0 or 64/w)
-pub const MD6_U: usize = 64 / MD6_W;
-/// Words for control word (0 or 64/w)
-pub const MD6_V: usize = 64 / MD6_W;
-/// Data words per compression block (> 0)
-pub const MD6_B: usize = 64;
-
 /// Number of bits in a word (64)
-pub const W: usize = MD6_W;
+pub const W: usize = 64;
 /// Size of compression output in words (16)
-pub const C: usize = MD6_C;
+pub const C: usize = 16;
 /// Size of compression input block in words (89)
-pub const N: usize = MD6_N;
+pub const N: usize = 89;
 /// Q words in a compression block (>= 0) (15)
-pub const Q: usize = MD6_Q;
+pub const Q: usize = 15;
 /// Key words per compression block (>= 0) (8)
-pub const K: usize = MD6_K;
+pub const K: usize = 8;
 /// Words for unique node ID (0 or 64/w)
-pub const U: usize = MD6_U;
+pub const U: usize = 1;
 /// Words for control word (0 or 64/w)
-pub const V: usize = MD6_V;
+pub const V: usize = 1;
 /// Data words per compression block (> 0) (64)
-pub const B: usize = MD6_B;
+pub const B: usize = 64;
+
+const _: () = {
+    if Q + K + U + V + B != N {
+        panic!("`Q + K + U + V` must be equal to `N`");
+    }
+};
 
 /// Index for linear feedback
 pub const T0: usize = 17;

md6/src/md6.rs

@@ -359,7 +359,7 @@ impl Md6VarCore {
         p: usize,
         z: usize,
     ) {
-        let mut n = [0; MD6_N];
+        let mut n = [0; N];
         let mut a = [0; 5000];
 
         // check that the input values are sensible