HMAC-SHA256 Tests

Here is our tests with RFC4231 test vectors:

import { describe, expect, it } from "vitest";
import { Bytes } from "o1js";
import { HMAC_SHA256 } from "./hmac-sha256";

describe("HMAC-SHA256 RFC 4231 Test Vectors", () => {
  // Test Case 1 - Basic test case with key length < block size
  it("should pass RFC 4231 Test Case 1", () => {
    const key = Bytes.fromHex("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b");
    const data = Bytes.fromString("Hi There");

    const ourHmac = HMAC_SHA256.compute(key, data);
    const expectedHmac =
      "b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7";

    expect(ourHmac.toHex()).toBe(expectedHmac);
  });

  // Test Case 2 - Test with key and data that is the ASCII string "what do ya want for nothing?"
  it("should pass RFC 4231 Test Case 2", () => {
    const key = Bytes.fromString("Jefe");
    const data = Bytes.fromString("what do ya want for nothing?");

    const ourHmac = HMAC_SHA256.compute(key, data);
    const expectedHmac =
      "5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843";

    expect(ourHmac.toHex()).toBe(expectedHmac);
  });

  // Test Case 3 - Test with key and data that are long hex strings
  it("should pass RFC 4231 Test Case 3", () => {
    const key = Bytes.fromHex("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
    const data = Bytes.fromHex(
      "dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd"
    );

    const ourHmac = HMAC_SHA256.compute(key, data);
    const expectedHmac =
      "773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514ced565fe";

    expect(ourHmac.toHex()).toBe(expectedHmac);
  });

  // Test Case 4 - Test with key and data that are long hex strings
  it("should pass RFC 4231 Test Case 4", () => {
    const key = Bytes.fromHex(
      "0102030405060708090a0b0c0d0e0f10111213141516171819"
    );
    const data = Bytes.fromHex(
      "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd"
    );

    const ourHmac = HMAC_SHA256.compute(key, data);
    const expectedHmac =
      "82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff46729665b";

    expect(ourHmac.toHex()).toBe(expectedHmac);
  });

  // Test Case 5 - Test with truncation to 128 bits
  it("should pass RFC 4231 Test Case 5 (without truncation)", () => {
    const key = Bytes.fromHex("0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c");
    const data = Bytes.fromString("Test With Truncation");

    const ourHmac = HMAC_SHA256.compute(key, data);
    const expectedHmac =
      "a3b6167473100ee06e0c796c2955552bfa6f7c0a6a8aef8b93f860aab0cd20c5";

    expect(ourHmac.toHex()).toBe(expectedHmac);
  });

  // Test Case 6 - Test with key larger than block size
  it("should pass RFC 4231 Test Case 6", () => {
    const key = Bytes.fromHex(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
    );
    const data = Bytes.fromString(
      "Test Using Larger Than Block-Size Key - Hash Key First"
    );

    const ourHmac = HMAC_SHA256.compute(key, data);
    const expectedHmac =
      "60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f0ee37f54";

    expect(ourHmac.toHex()).toBe(expectedHmac);
  });

  // Test Case 7 - Test with key and data larger than block size
  it("should pass RFC 4231 Test Case 7", () => {
    const key = Bytes.fromHex(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
    );
    const data = Bytes.fromString(
      "This is a test using a larger than block-size key and a larger than block-size data. The key needs to be hashed before being used by the HMAC algorithm."
    );

    const ourHmac = HMAC_SHA256.compute(key, data);
    const expectedHmac =
      "9b09ffa71b942fcb27635fbcd5b0e944bfdc63644f0713938a7f51535c3a35e2";

    expect(ourHmac.toHex()).toBe(expectedHmac);
  });
});