release/src/router/nettle/testsuite/rsa-encrypt-test.c

   1 #include "testutils.h"
   2
   3 #include "rsa.h"
   4 #include "knuth-lfib.h"
   5
   6 void
   7 test_main(void)
   8 {
   9   struct rsa_public_key pub;
  10   struct rsa_private_key key;
  11   struct knuth_lfib_ctx lfib;
  12
  13   /* FIXME: How is this spelled? */
  14   const uint8_t *msg = "Squemish ossifrage";
  15   unsigned msg_length;
  16
  17   uint8_t *decrypted;
  18   unsigned decrypted_length;
  19   uint8_t after;
  20
  21   mpz_t gibberish;
  22
  23   rsa_private_key_init(&key);
  24   rsa_public_key_init(&pub);
  25   mpz_init(gibberish);
  26
  27   knuth_lfib_init(&lfib, 17);
  28
  29   test_rsa_set_key_1(&pub, &key);
  30   msg_length = strlen(msg);
  31
  32   if (verbose)
  33     fprintf(stderr, "msg: `%s', length = %d\n", msg, msg_length);
  34
  35   ASSERT(rsa_encrypt(&pub,
  36                      &lfib, (nettle_random_func *) knuth_lfib_random,
  37                      msg_length, msg,
  38                      gibberish));
  39
  40   if (verbose)
  41     {
  42       /* In which GMP version was gmp_fprintf introduced? */
  43       fprintf(stderr, "encrypted: ");
  44       mpz_out_str(stderr, 10, gibberish);
  45     }
  46
  47   decrypted = xalloc(msg_length + 1);
  48
  49   knuth_lfib_random (&lfib, msg_length + 1, decrypted);
  50   after = decrypted[msg_length];
  51
  52   decrypted_length = msg_length - 1;
  53   ASSERT(!rsa_decrypt(&key, &decrypted_length, decrypted, gibberish));
  54
  55   decrypted_length = msg_length;
  56   ASSERT(rsa_decrypt(&key, &decrypted_length, decrypted, gibberish));
  57   ASSERT(decrypted_length == msg_length);
  58   ASSERT(MEMEQ(msg_length, msg, decrypted));
  59   ASSERT(decrypted[msg_length] == after);
  60
  61   knuth_lfib_random (&lfib, msg_length + 1, decrypted);
  62   after = decrypted[msg_length];
  63
  64   decrypted_length = key.size;
  65   ASSERT(rsa_decrypt(&key, &decrypted_length, decrypted, gibberish));
  66   ASSERT(decrypted_length == msg_length);
  67   ASSERT(MEMEQ(msg_length, msg, decrypted));
  68   ASSERT(decrypted[msg_length] == after);
  69
  70   knuth_lfib_random (&lfib, msg_length + 1, decrypted);
  71   after = decrypted[msg_length];
  72
  73   decrypted_length = msg_length;
  74   ASSERT(rsa_decrypt_tr(&pub, &key,
  75                         &lfib, (nettle_random_func *) knuth_lfib_random,
  76                         &decrypted_length, decrypted, gibberish));
  77   ASSERT(decrypted_length == msg_length);
  78   ASSERT(MEMEQ(msg_length, msg, decrypted));
  79   ASSERT(decrypted[msg_length] == after);
  80
  81   rsa_private_key_clear(&key);
  82   rsa_public_key_clear(&pub);
  83   mpz_clear(gibberish);
  84   free(decrypted);
  85 }
  86