The Tor Browser: services/crypto/tests/unit/test_utils

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* Any copyright is dedicated to the Public Domain.

     2  * http://creativecommons.org/publicdomain/zero/1.0/ */

     4 Cu.import("resource://services-common/utils.js");

     5 Cu.import("resource://services-crypto/utils.js");

     7 // Test vectors from RFC 5869

     9 // Test case 1

    11 let tc1 = {

    12    IKM:  "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b",

    13    salt: "000102030405060708090a0b0c",

    14    info: "f0f1f2f3f4f5f6f7f8f9",

    15    L:    42,

    16    PRK:  "077709362c2e32df0ddc3f0dc47bba63" +

    17          "90b6c73bb50f9c3122ec844ad7c2b3e5",

    18    OKM:  "3cb25f25faacd57a90434f64d0362f2a" +

    19          "2d2d0a90cf1a5a4c5db02d56ecc4c5bf" +

    20          "34007208d5b887185865"

    21 };

    23 // Test case 2

    25 let tc2 = {

    26    IKM:  "000102030405060708090a0b0c0d0e0f" +

    27          "101112131415161718191a1b1c1d1e1f" +

    28          "202122232425262728292a2b2c2d2e2f" +

    29          "303132333435363738393a3b3c3d3e3f" +

    30          "404142434445464748494a4b4c4d4e4f",

    31    salt: "606162636465666768696a6b6c6d6e6f" +

    32          "707172737475767778797a7b7c7d7e7f" +

    33          "808182838485868788898a8b8c8d8e8f" +

    34          "909192939495969798999a9b9c9d9e9f" +

    35          "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf",

    36    info: "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf" +

    37          "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf" +

    38          "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf" +

    39          "e0e1e2e3e4e5e6e7e8e9eaebecedeeef" +

    40          "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff",

    41    L:    82,

    42    PRK:  "06a6b88c5853361a06104c9ceb35b45c" +

    43          "ef760014904671014a193f40c15fc244",

    44    OKM:  "b11e398dc80327a1c8e7f78c596a4934" +

    45          "4f012eda2d4efad8a050cc4c19afa97c" +

    46          "59045a99cac7827271cb41c65e590e09" +

    47          "da3275600c2f09b8367793a9aca3db71" +

    48          "cc30c58179ec3e87c14c01d5c1f3434f" +

    49          "1d87"

    50 };

    52 // Test case 3

    54 let tc3 = {

    55    IKM:  "0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b",

    56    salt: "",

    57    info: "",

    58    L:    42,

    59    PRK:  "19ef24a32c717b167f33a91d6f648bdf" +

    60          "96596776afdb6377ac434c1c293ccb04",

    61    OKM:  "8da4e775a563c18f715f802a063c5a31" +

    62          "b8a11f5c5ee1879ec3454e5f3c738d2d" +

    63          "9d201395faa4b61a96c8"

    64 };

    66 function sha256HMAC(message, key) {

    67   let h = CryptoUtils.makeHMACHasher(Ci.nsICryptoHMAC.SHA256, key);

    68   return CryptoUtils.digestBytes(message, h);

    69 }

    71 function _hexToString(hex) {

    72   let ret = "";

    73   if (hex.length % 2 != 0) {

    74     return false;

    75   }

    77   for (let i = 0; i < hex.length; i += 2) {

    78     let cur = hex[i] + hex[i + 1];

    79     ret += String.fromCharCode(parseInt(cur, 16));

    80   }

    81   return ret;

    82 }

    84 function extract_hex(salt, ikm) {

    85   salt = _hexToString(salt);

    86   ikm = _hexToString(ikm);

    87   return CommonUtils.bytesAsHex(sha256HMAC(ikm, CryptoUtils.makeHMACKey(salt)));

    88 }

    90 function expand_hex(prk, info, len) {

    91   prk = _hexToString(prk);

    92   info = _hexToString(info);

    93   return CommonUtils.bytesAsHex(CryptoUtils.hkdfExpand(prk, info, len));

    94 }

    96 function hkdf_hex(ikm, salt, info, len) {

    97   ikm = _hexToString(ikm);

    98   if (salt)

    99     salt = _hexToString(salt);

   100   info = _hexToString(info);

   101   return CommonUtils.bytesAsHex(CryptoUtils.hkdf(ikm, salt, info, len));

   102 }

   104 function run_test() {

   105   _("Verifying Test Case 1");

   106   do_check_eq(extract_hex(tc1.salt, tc1.IKM), tc1.PRK);

   107   do_check_eq(expand_hex(tc1.PRK, tc1.info, tc1.L), tc1.OKM);

   108   do_check_eq(hkdf_hex(tc1.IKM, tc1.salt, tc1.info, tc1.L), tc1.OKM);

   110   _("Verifying Test Case 2");

   111   do_check_eq(extract_hex(tc2.salt, tc2.IKM), tc2.PRK);

   112   do_check_eq(expand_hex(tc2.PRK, tc2.info, tc2.L), tc2.OKM);

   113   do_check_eq(hkdf_hex(tc2.IKM, tc2.salt, tc2.info, tc2.L), tc2.OKM);

   115   _("Verifying Test Case 3");

   116   do_check_eq(extract_hex(tc3.salt, tc3.IKM), tc3.PRK);

   117   do_check_eq(expand_hex(tc3.PRK, tc3.info, tc3.L), tc3.OKM);

   118   do_check_eq(hkdf_hex(tc3.IKM, tc3.salt, tc3.info, tc3.L), tc3.OKM);

   119   do_check_eq(hkdf_hex(tc3.IKM, undefined, tc3.info, tc3.L), tc3.OKM);

   120 }

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