Vendor dependencies

notes-service/vendor/sha2-0.10.9/src/sha256/soft_compact.rs

@@ -0,0 +1,66 @@
+use crate::consts::K32;
+
+fn to_u32s(block: &[u8; 64]) -> [u32; 16] {
+    use core::convert::TryInto;
+    let mut res = [0u32; 16];
+    for i in 0..16 {
+        let chunk = block[4 * i..][..4].try_into().unwrap();
+        res[i] = u32::from_be_bytes(chunk);
+    }
+    res
+}
+
+fn compress_u32(state: &mut [u32; 8], block: [u32; 16]) {
+    let [mut a, mut b, mut c, mut d, mut e, mut f, mut g, mut h] = *state;
+
+    let mut w = [0; 64];
+    w[..16].copy_from_slice(&block);
+
+    for i in 16..64 {
+        let w15 = w[i - 15];
+        let s0 = (w15.rotate_right(7)) ^ (w15.rotate_right(18)) ^ (w15 >> 3);
+        let w2 = w[i - 2];
+        let s1 = (w2.rotate_right(17)) ^ (w2.rotate_right(19)) ^ (w2 >> 10);
+        w[i] = w[i - 16]
+            .wrapping_add(s0)
+            .wrapping_add(w[i - 7])
+            .wrapping_add(s1);
+    }
+
+    for i in 0..64 {
+        let s1 = e.rotate_right(6) ^ e.rotate_right(11) ^ e.rotate_right(25);
+        let ch = (e & f) ^ ((!e) & g);
+        let t1 = s1
+            .wrapping_add(ch)
+            .wrapping_add(K32[i])
+            .wrapping_add(w[i])
+            .wrapping_add(h);
+        let s0 = a.rotate_right(2) ^ a.rotate_right(13) ^ a.rotate_right(22);
+        let maj = (a & b) ^ (a & c) ^ (b & c);
+        let t2 = s0.wrapping_add(maj);
+
+        h = g;
+        g = f;
+        f = e;
+        e = d.wrapping_add(t1);
+        d = c;
+        c = b;
+        b = a;
+        a = t1.wrapping_add(t2);
+    }
+
+    state[0] = state[0].wrapping_add(a);
+    state[1] = state[1].wrapping_add(b);
+    state[2] = state[2].wrapping_add(c);
+    state[3] = state[3].wrapping_add(d);
+    state[4] = state[4].wrapping_add(e);
+    state[5] = state[5].wrapping_add(f);
+    state[6] = state[6].wrapping_add(g);
+    state[7] = state[7].wrapping_add(h);
+}
+
+pub fn compress(state: &mut [u32; 8], blocks: &[[u8; 64]]) {
+    for block in blocks.iter() {
+        compress_u32(state, to_u32s(block));
+    }
+}