net/mptcp/crypto_test.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <kunit/test.h>
   3
   4 #include "protocol.h"
   5
   6 struct test_case {
   7         char *key;
   8         char *msg;
   9         char *result;
  10 };
  11
  12 /* we can't reuse RFC 4231 test vectors, as we have constraint on the
  13  * input and key size.
  14  */
  15 static struct test_case tests[] = {
  16         {
  17                 .key = "0b0b0b0b0b0b0b0b",
  18                 .msg = "48692054",
  19                 .result = "8385e24fb4235ac37556b6b886db106284a1da671699f46db1f235ec622dcafa",
  20         },
  21         {
  22                 .key = "aaaaaaaaaaaaaaaa",
  23                 .msg = "dddddddd",
  24                 .result = "2c5e219164ff1dca1c4a92318d847bb6b9d44492984e1eb71aff9022f71046e9",
  25         },
  26         {
  27                 .key = "0102030405060708",
  28                 .msg = "cdcdcdcd",
  29                 .result = "e73b9ba9969969cefb04aa0d6df18ec2fcc075b6f23b4d8c4da736a5dbbc6e7d",
  30         },
  31 };
  32
  33 static void mptcp_crypto_test_basic(struct kunit *test)
  34 {
  35         char hmac[32], hmac_hex[65];
  36         u32 nonce1, nonce2;
  37         u64 key1, key2;
  38         u8 msg[8];
  39         int i, j;
  40
  41         for (i = 0; i < ARRAY_SIZE(tests); ++i) {
  42                 /* mptcp hmap will convert to be before computing the hmac */
  43                 key1 = be64_to_cpu(*((__be64 *)&tests[i].key[0]));
  44                 key2 = be64_to_cpu(*((__be64 *)&tests[i].key[8]));
  45                 nonce1 = be32_to_cpu(*((__be32 *)&tests[i].msg[0]));
  46                 nonce2 = be32_to_cpu(*((__be32 *)&tests[i].msg[4]));
  47
  48                 put_unaligned_be32(nonce1, &msg[0]);
  49                 put_unaligned_be32(nonce2, &msg[4]);
  50
  51                 mptcp_crypto_hmac_sha(key1, key2, msg, 8, hmac);
  52                 for (j = 0; j < 32; ++j)
  53                         sprintf(&hmac_hex[j << 1], "%02x", hmac[j] & 0xff);
  54                 hmac_hex[64] = 0;
  55
  56                 KUNIT_EXPECT_STREQ(test, &hmac_hex[0], tests[i].result);
  57         }
  58 }
  59
  60 static struct kunit_case mptcp_crypto_test_cases[] = {
  61         KUNIT_CASE(mptcp_crypto_test_basic),
  62         {}
  63 };
  64
  65 static struct kunit_suite mptcp_crypto_suite = {
  66         .name = "mptcp-crypto",
  67         .test_cases = mptcp_crypto_test_cases,
  68 };
  69
  70 kunit_test_suite(mptcp_crypto_suite);
  71
  72 MODULE_LICENSE("GPL");