From: Chris Duncan <chris@zoso.dev>
Date: Sat, 23 Nov 2024 08:50:30 +0000 (-0800)
Subject: Replace hash function in 25519 implemention
X-Git-Url: https://zoso.dev/?a=commitdiff_plain;h=7a8c4d465e11136a123a27d5b9e3e36741657e92;p=libnemo.git

Replace hash function in 25519 implemention
---

diff --git a/src/lib/workers/nano25519.ts b/src/lib/workers/nano25519.ts
index dcf6560..d194a28 100644
--- a/src/lib/workers/nano25519.ts
+++ b/src/lib/workers/nano25519.ts
@@ -1820,43 +1820,15 @@ import blake2b from 'blake2b'
 	}
 	
 	function crypto_hash(out, m, n) {
-		var hh = new Int32Array(8),
-				hl = new Int32Array(8),
-				x = new Uint8Array(256),
-				i, b = n;
-	
-		hh[0] = 0x6a09e667;
-		hh[1] = 0xbb67ae85;
-		hh[2] = 0x3c6ef372;
-		hh[3] = 0xa54ff53a;
-		hh[4] = 0x510e527f;
-		hh[5] = 0x9b05688c;
-		hh[6] = 0x1f83d9ab;
-		hh[7] = 0x5be0cd19;
-	
-		hl[0] = 0xf3bcc908;
-		hl[1] = 0x84caa73b;
-		hl[2] = 0xfe94f82b;
-		hl[3] = 0x5f1d36f1;
-		hl[4] = 0xade682d1;
-		hl[5] = 0x2b3e6c1f;
-		hl[6] = 0xfb41bd6b;
-		hl[7] = 0x137e2179;
-	
-		crypto_hashblocks_hl(hh, hl, m, n);
-		n %= 128;
-	
-		for (i = 0; i < n; i++) x[i] = m[b-n+i];
-		x[n] = 128;
-	
-		n = 256-128*(n<112?1:0);
-		x[n-9] = 0;
-		ts64(x, n-8,  (b / 0x20000000) | 0, b << 3);
-		crypto_hashblocks_hl(hh, hl, x, n);
-	
-		for (i = 0; i < 8; i++) ts64(out, 8*i, hh[i], hl[i]);
-	
-		return 0;
+		const input = new Uint8Array(n)
+		for (let i = 0; i < n; ++i) {
+			input[i] = m[i]
+		}
+		const hash = blake2b(64).update(input).digest()
+		for (let i = 0; i < 64; ++i) {
+			out[i] = hash[i]
+		}
+		return 0
 	}
 	
 	function add(p, q) {