wip

crypto/_benches/bench.ts

@@ -1,9 +1,6 @@
 #!/usr/bin/env -S deno bench
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-import {
-  crypto as stdCrypto,
-  DIGEST_ALGORITHM_NAMES,
-} from "https://deno.land/std@$STD_VERSION/crypto/mod.ts";
+import { crypto as stdCrypto, DIGEST_ALGORITHM_NAMES } from "../mod.ts";
 
 import { crypto as oldCrypto } from "https://deno.land/[email protected]/crypto/mod.ts";
 

crypto/_fnv/fnv32.ts

@@ -0,0 +1,32 @@
+// Ported from Go:
+// https://github.com/golang/go/tree/go1.13.10/src/hash/fnv/fnv.go
+// Copyright 2011 The Go Authors. All rights reserved. BSD license.
+// https://github.com/golang/go/blob/master/LICENSE
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+// This module is browser compatible.
+
+import { mul32, swap32 } from "./util.ts";
+
+const prime32 = 16777619;
+
+export const fnv32 = (data: Uint8Array): ArrayBuffer => {
+  let hash = 2166136261;
+
+  data.forEach((c) => {
+    hash = mul32(hash, prime32);
+    hash ^= c;
+  });
+
+  return Uint32Array.from([swap32(hash)]).buffer;
+};
+
+export const fnv32a = (data: Uint8Array): ArrayBuffer => {
+  let hash = 2166136261;
+
+  data.forEach((c) => {
+    hash ^= c;
+    hash = mul32(hash, prime32);
+  });
+
+  return Uint32Array.from([swap32(hash)]).buffer;
+};

crypto/_fnv/fnv64.ts

@@ -0,0 +1,35 @@
+// Ported from Go:
+// https://github.com/golang/go/tree/go1.13.10/src/hash/fnv/fnv.go
+// Copyright 2011 The Go Authors. All rights reserved. BSD license.
+// https://github.com/golang/go/blob/master/LICENSE
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+// This module is browser compatible.
+
+import { mul64, swap32 } from "./util.ts";
+
+const prime64Lo = 435;
+const prime64Hi = 256;
+
+export const fnv64 = (data: Uint8Array): ArrayBuffer => {
+  let hashLo = 2216829733;
+  let hashHi = 3421674724;
+
+  data.forEach((c) => {
+    [hashHi, hashLo] = mul64([hashHi, hashLo], [prime64Hi, prime64Lo]);
+    hashLo ^= c;
+  });
+
+  return new Uint32Array([swap32(hashHi >>> 0), swap32(hashLo >>> 0)]).buffer;
+};
+
+export const fnv64a = (data: Uint8Array): ArrayBuffer => {
+  let hashLo = 2216829733;
+  let hashHi = 3421674724;
+
+  data.forEach((c) => {
+    hashLo ^= c;
+    [hashHi, hashLo] = mul64([hashHi, hashLo], [prime64Hi, prime64Lo]);
+  });
+
+  return new Uint32Array([swap32(hashHi >>> 0), swap32(hashLo >>> 0)]).buffer;
+};

crypto/_fnv/mod.ts

@@ -0,0 +1,24 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+// This module is browser compatible.
+
+import { fnv32, fnv32a } from "./fnv32.ts";
+import { fnv64, fnv64a } from "./fnv64.ts";
+
+export function fnv(name: string, buf?: Uint8Array): ArrayBuffer {
+  if (!buf) {
+    throw new TypeError("no data provided for hashing");
+  }
+
+  switch (name) {
+    case "FNV32":
+      return fnv32(buf);
+    case "FNV64":
+      return fnv64(buf);
+    case "FNV32A":
+      return fnv32a(buf);
+    case "FNV64A":
+      return fnv64a(buf);
+    default:
+      throw new TypeError(`unsupported fnv digest: ${name}`);
+  }
+}

crypto/_fnv/util.ts

@@ -0,0 +1,62 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+// This module is browser compatible.
+
+export function swap32(val: number): number {
+  return (
+    ((val & 0xff) << 24) |
+    ((val & 0xff00) << 8) |
+    ((val >> 8) & 0xff00) |
+    ((val >> 24) & 0xff)
+  );
+}
+
+function n16(n: number): number {
+  return n & 0xffff;
+}
+
+function n32(n: number): number {
+  return n >>> 0;
+}
+
+function add32WithCarry(a: number, b: number): [number, number] {
+  const added = n32(a) + n32(b);
+  return [n32(added), added > 0xffffffff ? 1 : 0];
+}
+
+function mul32WithCarry(a: number, b: number): [number, number] {
+  const al = n16(a);
+  const ah = n16(a >>> 16);
+  const bl = n16(b);
+  const bh = n16(b >>> 16);
+
+  const [t, tc] = add32WithCarry(al * bh, ah * bl);
+  const [n, nc] = add32WithCarry(al * bl, n32(t << 16));
+  const carry = nc + (tc << 16) + n16(t >>> 16) + ah * bh;
+
+  return [n, carry];
+}
+
+/**
+ * mul32 performs 32-bit multiplication, a * b
+ * @param a
+ * @param b
+ */
+export function mul32(a: number, b: number): number {
+  // https://stackoverflow.com/a/28151933
+  const al = n16(a);
+  const ah = a - al;
+  return n32(n32(ah * b) + al * b);
+}
+
+/**
+ * mul64 performs 64-bit multiplication with two 32-bit words
+ * @param [ah, al]
+ * @param [bh, bl]
+ */
+export function mul64(
+  [ah, al]: [number, number],
+  [bh, bl]: [number, number],
+): [number, number] {
+  const [n, c] = mul32WithCarry(al, bl);
+  return [n32(mul32(al, bh) + mul32(ah, bl) + c), n];
+}

crypto/_fnv/util_test.ts

@@ -0,0 +1,69 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import { assertEquals } from "../../assert/mod.ts";
+import { mul32, mul64 } from "./util.ts";
+
+Deno.test("mul32()", () => {
+  assertEquals(mul32(0xffffffff, 0xffffffff), 1);
+  assertEquals(mul32(0x12345678, 0xdeadbeef), 0x5621ca08);
+  assertEquals(mul32(0xf626f430, 0xff7469f1), 0x2a939130);
+  assertEquals(mul32(0x543f9412, 0x8a4aa84f), 0x39fe818e);
+  assertEquals(mul32(0x8ee170d1, 0x2fbbb9ec), 0x6a0609ac);
+  assertEquals(mul32(0xea3b3a14, 0xa397bd0a), 0xddfd08c8);
+  assertEquals(mul32(0x93f8536b, 0xa79e3c04), 0xcc7861ac);
+  assertEquals(mul32(0xf97dab98, 0xed526241), 0x2348c198);
+  assertEquals(mul32(0x35500191, 0xd5012447), 0xaff9d337);
+  assertEquals(mul32(0x471dde47, 0xaaa4950c), 0x4341be54);
+  assertEquals(mul32(0xd633970d, 0xa9bc2bcd), 0xb43b2469);
+  assertEquals(mul32(0xc60898cc, 0xbfe7dcc4), 0x15f84c30);
+});
+
+Deno.test("mul64()", () => {
+  assertEquals(mul64([0xffffffff, 0xffffffff], [0xffffffff, 0xffffffff]), [
+    0,
+    1,
+  ]);
+  assertEquals(mul64([0x12345678, 0xdeadbeef], [0xcafebabe, 0xbaadf00d]), [
+    0xc801c86b,
+    0xdf55c223,
+  ]);
+  assertEquals(mul64([0xdc479aed, 0x24bc71a3], [0x543717c1, 0x4b6056b9]), [
+    0x56c7ec8f,
+    0x387ae0cb,
+  ]);
+  assertEquals(mul64([0xb84936ae, 0xb84becd2], [0x2864edd1, 0x14ee13cc]), [
+    0xd87e9171,
+    0x12504d58,
+  ]);
+  assertEquals(mul64([0xb0b73e95, 0x3f5cc701], [0x6c7b30b8, 0xcd7f0f9e]), [
+    0x570551ee,
+    0x116ae19e,
+  ]);
+  assertEquals(mul64([0xc237b433, 0x160b50bf], [0x3f937c23, 0xf26175f7]), [
+    0x48a1d118,
+    0x97313349,
+  ]);
+  assertEquals(mul64([0x386242fd, 0x6baa0fc0], [0xf81f7e23, 0xbe172381]), [
+    0x4799f2a3,
+    0x6b192fc0,
+  ]);
+  assertEquals(mul64([0x5afc8714, 0x902180d1], [0xa7068c96, 0xb859bb4d]), [
+    0xb4589d29,
+    0xd3d569dd,
+  ]);
+  assertEquals(mul64([0xb4e86a68, 0x619bee92], [0xd67560fa, 0x736982a7]), [
+    0x72c73b5d,
+    0x4bc0c53e,
+  ]);
+  assertEquals(mul64([0xfc8b5561, 0xbf91d6d5], [0x2bcb029a, 0xa144ead3]), [
+    0x2da439a7,
+    0x3926c38f,
+  ]);
+  assertEquals(mul64([0x47b62fae, 0xffe8cb4c], [0xbda77111, 0x6cad4968]), [
+    0x9d9b7832,
+    0xcae742e0,
+  ]);
+  assertEquals(mul64([0xc9160fc1, 0xd96e085b], [0x3adfd031, 0x3f75e557]), [
+    0xe4d0bf23,
+    0x88753ded,
+  ]);
+});