import { Hmac, createHmac, createSecretKey } from "crypto";
import { test, expect, describe } from "bun:test";

function testHmac(algo, key, data, expected) {
  if (!Array.isArray(data)) data = [data];
  // If the key is a Buffer, test Hmac with a key object as well.
  const keyWrappers = [key => key, ...(typeof key === "string" ? [] : [createSecretKey])];
  const wrapperName = ["default", "KeyObject"];

  for (const i in keyWrappers) {
    const keyWrapper = keyWrappers[i];
    test(`Hmac ${algo} with ${wrapperName[i]} key`, async () => {
      const hmac = createHmac(algo, keyWrapper(key));
      for (const chunk of data) hmac.update(chunk);
      const actual = hmac.digest("hex");
      expect(actual).toEqual(expected);
    });
  }
}

describe("crypto.Hmac", () => {
  test.todo("Hmac is expected to return a new instance", async () => {
    const instance = Hmac("sha256", "Node");
    expect(instance instanceof Hmac).toBe(true);
  });

  test("createHmac should throw when using invalid options", async () => {
    expect(() => createHmac(null)).toThrow("null is not an object");
    expect(() => createHmac("sha1", null)).toThrow("null is not an object");
  });

  describe("test HMAC with multiple updates.", async () => {
    testHmac("sha1", "Node", ["some data", "to hmac"], "19fd6e1ba73d9ed2224dd5094a71babe85d9a892");
  });

  describe("test HMAC with Wikipidia test cases", async () => {
    const wikipedia = [
      {
        key: "key",
        data: "The quick brown fox jumps over the lazy dog",
        hmac: {
          // HMACs lifted from Wikipedia.
          md5: "80070713463e7749b90c2dc24911e275",
          sha1: "de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9",
          sha256: "f7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc" + "2d1a3cd8",
        },
      },
      {
        key: "key",
        data: "",
        hmac: {
          // Intermediate test to help debugging.
          md5: "63530468a04e386459855da0063b6596",
          sha1: "f42bb0eeb018ebbd4597ae7213711ec60760843f",
          sha256: "5d5d139563c95b5967b9bd9a8c9b233a9dedb45072794cd232dc1b74" + "832607d0",
        },
      },
      {
        key: "",
        data: "The quick brown fox jumps over the lazy dog",
        hmac: {
          // Intermediate test to help debugging.
          md5: "ad262969c53bc16032f160081c4a07a0",
          sha1: "2ba7f707ad5f187c412de3106583c3111d668de8",
          sha256: "fb011e6154a19b9a4c767373c305275a5a69e8b68b0b4c9200c383dc" + "ed19a416",
        },
      },
      {
        key: "",
        data: "",
        hmac: {
          // HMACs lifted from Wikipedia.
          md5: "74e6f7298a9c2d168935f58c001bad88",
          sha1: "fbdb1d1b18aa6c08324b7d64b71fb76370690e1d",
          sha256: "b613679a0814d9ec772f95d778c35fc5ff1697c493715653c6c71214" + "4292c5ad",
        },
      },
    ];

    for (const { key, data, hmac } of wikipedia) {
      for (const hash in hmac) testHmac(hash, key, data, hmac[hash]);
    }
  });

  describe("HMAC-SHA-* (rfc 4231 Test Cases)", async () => {
    const rfc4231 = [
      {
        key: Buffer.from("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b", "hex"),
        data: Buffer.from("4869205468657265", "hex"), // 'Hi There'
        hmac: {
          sha224: "896fb1128abbdf196832107cd49df33f47b4b1169912ba4f53684b22",
          sha256: "b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c" + "2e32cff7",
          sha384:
            "afd03944d84895626b0825f4ab46907f15f9dadbe4101ec682aa034c" + "7cebc59cfaea9ea9076ede7f4af152e8b2fa9cb6",
          sha512:
            "87aa7cdea5ef619d4ff0b4241a1d6cb02379f4e2ce4ec2787ad0b305" +
            "45e17cdedaa833b7d6b8a702038b274eaea3f4e4be9d914eeb61f170" +
            "2e696c203a126854",
        },
      },
      {
        key: Buffer.from("4a656665", "hex"), // 'Jefe'
        data: Buffer.from("7768617420646f2079612077616e7420666f72206e6f74686" + "96e673f", "hex"), // 'what do ya want for nothing?'
        hmac: {
          sha224: "a30e01098bc6dbbf45690f3a7e9e6d0f8bbea2a39e6148008fd05e44",
          sha256: "5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b9" + "64ec3843",
          sha384:
            "af45d2e376484031617f78d2b58a6b1b9c7ef464f5a01b47e42ec373" + "6322445e8e2240ca5e69e2c78b3239ecfab21649",
          sha512:
            "164b7a7bfcf819e2e395fbe73b56e0a387bd64222e831fd610270cd7" +
            "ea2505549758bf75c05a994a6d034f65f8f0e6fdcaeab1a34d4a6b4b" +
            "636e070a38bce737",
        },
      },
      {
        key: Buffer.from("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "hex"),
        data: Buffer.from(
          "ddddddddddddddddddddddddddddddddddddddddddddddddd" + "ddddddddddddddddddddddddddddddddddddddddddddddddddd",
          "hex",
        ),
        hmac: {
          sha224: "7fb3cb3588c6c1f6ffa9694d7d6ad2649365b0c1f65d69d1ec8333ea",
          sha256: "773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514" + "ced565fe",
          sha384:
            "88062608d3e6ad8a0aa2ace014c8a86f0aa635d947ac9febe83ef4e5" + "5966144b2a5ab39dc13814b94e3ab6e101a34f27",
          sha512:
            "fa73b0089d56a284efb0f0756c890be9b1b5dbdd8ee81a3655f83e33" +
            "b2279d39bf3e848279a722c806b485a47e67c807b946a337bee89426" +
            "74278859e13292fb",
        },
      },
      {
        key: Buffer.from("0102030405060708090a0b0c0d0e0f10111213141516171819", "hex"),
        data: Buffer.from(
          "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc" + "dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd",
          "hex",
        ),
        hmac: {
          sha224: "6c11506874013cac6a2abc1bb382627cec6a90d86efc012de7afec5a",
          sha256: "82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff4" + "6729665b",
          sha384:
            "3e8a69b7783c25851933ab6290af6ca77a9981480850009cc5577c6e" + "1f573b4e6801dd23c4a7d679ccf8a386c674cffb",
          sha512:
            "b0ba465637458c6990e5a8c5f61d4af7e576d97ff94b872de76f8050" +
            "361ee3dba91ca5c11aa25eb4d679275cc5788063a5f19741120c4f2d" +
            "e2adebeb10a298dd",
        },
      },

      {
        key: Buffer.from("0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c", "hex"),
        // 'Test With Truncation'
        data: Buffer.from("546573742057697468205472756e636174696f6e", "hex"),
        hmac: {
          sha224: "0e2aea68a90c8d37c988bcdb9fca6fa8",
          sha256: "a3b6167473100ee06e0c796c2955552b",
          sha384: "3abf34c3503b2a23a46efc619baef897",
          sha512: "415fad6271580a531d4179bc891d87a6",
        },
        truncate: true,
      },
      {
        key: Buffer.from(
          "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaa",
          "hex",
        ),
        // 'Test Using Larger Than Block-Size Key - Hash Key First'
        data: Buffer.from(
          "54657374205573696e67204c6172676572205468616e20426" +
            "c6f636b2d53697a65204b6579202d2048617368204b657920" +
            "4669727374",
          "hex",
        ),
        hmac: {
          sha224: "95e9a0db962095adaebe9b2d6f0dbce2d499f112f2d2b7273fa6870e",
          sha256: "60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f" + "0ee37f54",
          sha384:
            "4ece084485813e9088d2c63a041bc5b44f9ef1012a2b588f3cd11f05" + "033ac4c60c2ef6ab4030fe8296248df163f44952",
          sha512:
            "80b24263c7c1a3ebb71493c1dd7be8b49b46d1f41b4aeec1121b0137" +
            "83f8f3526b56d037e05f2598bd0fd2215d6a1e5295e64f73f63f0aec" +
            "8b915a985d786598",
        },
      },
      {
        key: Buffer.from(
          "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaa",
          "hex",
        ),
        // '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.'
        data: Buffer.from(
          "5468697320697320612074657374207573696e672061206c6" +
            "172676572207468616e20626c6f636b2d73697a65206b6579" +
            "20616e642061206c6172676572207468616e20626c6f636b2" +
            "d73697a6520646174612e20546865206b6579206e65656473" +
            "20746f20626520686173686564206265666f7265206265696" +
            "e6720757365642062792074686520484d414320616c676f72" +
            "6974686d2e",
          "hex",
        ),
        hmac: {
          sha224: "3a854166ac5d9f023f54d517d0b39dbd946770db9c2b95c9f6f565d1",
          sha256: "9b09ffa71b942fcb27635fbcd5b0e944bfdc63644f0713938a7f5153" + "5c3a35e2",
          sha384:
            "6617178e941f020d351e2f254e8fd32c602420feb0b8fb9adccebb82" + "461e99c5a678cc31e799176d3860e6110c46523e",
          sha512:
            "e37b6a775dc87dbaa4dfa9f96e5e3ffddebd71f8867289865df5a32d" +
            "20cdc944b6022cac3c4982b10d5eeb55c3e4de15134676fb6de04460" +
            "65c97440fa8c6a58",
        },
      },
    ];

    for (let i = 0, l = rfc4231.length; i < l; i++) {
      for (const hash in rfc4231[i].hmac) {
        test(`Test HMAC-${hash} rfc 4231 case ${i + 1}`, async () => {
          const str = createHmac(hash, rfc4231[i].key);
          str.end(rfc4231[i].data);
          let strRes = str.read().toString("hex");
          let actual = createHmac(hash, rfc4231[i].key).update(rfc4231[i].data).digest("hex");
          if (rfc4231[i].truncate) {
            actual = actual.substr(0, 32); // first 128 bits == 32 hex chars
            strRes = strRes.substr(0, 32);
          }
          const expected = rfc4231[i].hmac[hash];
          // `Test HMAC-${hash} rfc 4231 case ${i + 1}: ${actual} must be ${expected}`);
          expect(actual).toEqual(expected);
          expect(actual).toEqual(strRes);
        });
      }
    }
  });

  describe("HMAC-MD5/SHA1 (rfc 2202 Test Cases)", async () => {
    const rfc2202_md5 = [
      {
        key: Buffer.from("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b", "hex"),
        data: "Hi There",
        hmac: "9294727a3638bb1c13f48ef8158bfc9d",
      },
      {
        key: "Jefe",
        data: "what do ya want for nothing?",
        hmac: "750c783e6ab0b503eaa86e310a5db738",
      },
      {
        key: Buffer.from("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "hex"),
        data: Buffer.from(
          "ddddddddddddddddddddddddddddddddddddddddddddddddd" + "ddddddddddddddddddddddddddddddddddddddddddddddddddd",
          "hex",
        ),
        hmac: "56be34521d144c88dbb8c733f0e8b3f6",
      },
      {
        key: Buffer.from("0102030405060708090a0b0c0d0e0f10111213141516171819", "hex"),
        data: Buffer.from(
          "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc" +
            "dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd" +
            "cdcdcdcdcd",
          "hex",
        ),
        hmac: "697eaf0aca3a3aea3a75164746ffaa79",
      },
      {
        key: Buffer.from("0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c", "hex"),
        data: "Test With Truncation",
        hmac: "56461ef2342edc00f9bab995690efd4c",
      },
      {
        key: Buffer.from(
          "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaa",
          "hex",
        ),
        data: "Test Using Larger Than Block-Size Key - Hash Key First",
        hmac: "6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd",
      },
      {
        key: Buffer.from(
          "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaa",
          "hex",
        ),
        data: "Test Using Larger Than Block-Size Key and Larger Than One " + "Block-Size Data",
        hmac: "6f630fad67cda0ee1fb1f562db3aa53e",
      },
    ];

    for (const { key, data, hmac } of rfc2202_md5) {
      describe(`rfc 2202 md5 case ${hmac}`, async () => {
        testHmac("md5", key, data, hmac);
      });
    }

    const rfc2202_sha1 = [
      {
        key: Buffer.from("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b", "hex"),
        data: "Hi There",
        hmac: "b617318655057264e28bc0b6fb378c8ef146be00",
      },
      {
        key: "Jefe",
        data: "what do ya want for nothing?",
        hmac: "effcdf6ae5eb2fa2d27416d5f184df9c259a7c79",
      },
      {
        key: Buffer.from("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "hex"),
        data: Buffer.from(
          "ddddddddddddddddddddddddddddddddddddddddddddd" +
            "ddddddddddddddddddddddddddddddddddddddddddddd" +
            "dddddddddd",
          "hex",
        ),
        hmac: "125d7342b9ac11cd91a39af48aa17b4f63f175d3",
      },
      {
        key: Buffer.from("0102030405060708090a0b0c0d0e0f10111213141516171819", "hex"),
        data: Buffer.from(
          "cdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdc" +
            "dcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcdcd" +
            "cdcdcdcdcd",
          "hex",
        ),
        hmac: "4c9007f4026250c6bc8414f9bf50c86c2d7235da",
      },
      {
        key: Buffer.from("0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c", "hex"),
        data: "Test With Truncation",
        hmac: "4c1a03424b55e07fe7f27be1d58bb9324a9a5a04",
      },
      {
        key: Buffer.from(
          "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaa",
          "hex",
        ),
        data: "Test Using Larger Than Block-Size Key - Hash Key First",
        hmac: "aa4ae5e15272d00e95705637ce8a3b55ed402112",
      },
      {
        key: Buffer.from(
          "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" +
            "aaaaaaaaaaaaaaaaaaaaaa",
          "hex",
        ),
        data: "Test Using Larger Than Block-Size Key and Larger Than One " + "Block-Size Data",
        hmac: "e8e99d0f45237d786d6bbaa7965c7808bbff1a91",
      },
    ];

    for (const { key, data, hmac } of rfc2202_sha1) {
      describe(`rfc 2202 sha1 case ${hmac}`, async () => {
        testHmac("sha1", key, data, hmac);
      });
    }
  });

  test("sha256 w00t ucs2", async () => {
    expect(createHmac("sha256", "w00t").digest("ucs2")).toEqual(createHmac("sha256", "w00t").digest().toString("ucs2"));
  });

  test("Check initialized -> uninitialized state transition after calling digest().", async () => {
    {
      const expected =
        "\u0010\u0041\u0052\u00c5\u00bf\u00dc\u00a0\u007b\u00c6\u0033" +
        "\u00ee\u00bd\u0046\u0019\u009f\u0002\u0055\u00c9\u00f4\u009d";

      {
        const h = createHmac("sha1", "key").update("data");
        expect(h.digest("latin1")).toBe(expected);
        expect(h.digest("latin1")).toBe("");
      }
      {
        const h = createHmac("sha1", "key").update("data");
        expect(h.digest("buffer")).toEqual(Buffer.from(expected, "latin1"));
        expect(h.digest("buffer")).toEqual(Buffer.from(""));
      }
    }
    {
      const expected =
        "\u00f4\u002b\u00b0\u00ee\u00b0\u0018\u00eb\u00bd\u0045\u0097" +
        "\u00ae\u0072\u0013\u0071\u001e\u00c6\u0007\u0060\u0084\u003f";
      {
        const h = createHmac("sha1", "key");
        expect(h.digest("latin1")).toBe(expected);
        expect(h.digest("latin1")).toBe("");
      }
      {
        const h = createHmac("sha1", "key");
        expect(h.digest("buffer")).toEqual(Buffer.from(expected, "latin1"));
        expect(h.digest("buffer")).toEqual(Buffer.from(""));
      }
    }
  });
  test("Invalid digest", async () => {
    expect(() => createHmac("sha7", "key")).toThrow(/sha7 is not supported/);
  });

  test("secret digest", async () => {
    const buf = Buffer.alloc(0);
    const keyObject = createSecretKey(Buffer.alloc(0));
    expect(createHmac("sha256", buf).update("foo").digest()).toEqual(
      createHmac("sha256", keyObject).update("foo").digest(),
    );
  });
});