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annotate libtomcrypt/tests/prng_test.c @ 1620:572a7aefa188 bugfix

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author Matt Johnston <matt@ucc.asn.au>
date Fri, 07 Sep 2018 23:02:20 +0800
parents 6dba84798cd5
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1471
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9 #include <tomcrypt_test.h>
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10
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11 #ifdef LTC_PRNG_ENABLE_LTC_RNG
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12
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13 static unsigned long my_test_rng_read;
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14
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15 static unsigned long my_test_rng(unsigned char *buf, unsigned long len,
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16 void (*callback)(void))
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17 {
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18 unsigned long n;
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19 LTC_UNUSED_PARAM(callback);
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20 for (n = 0; n < len; ++n) {
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21 buf[n] = 4;
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22 }
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23 my_test_rng_read += n;
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24 return n;
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25 }
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26
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27 #endif
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28
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29 int prng_test(void)
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30 {
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31 int err = CRYPT_NOP;
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32 int x;
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33 unsigned char buf[4096] = { 0 };
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34 unsigned long n, one;
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35 prng_state nprng;
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36
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37 #ifdef LTC_PRNG_ENABLE_LTC_RNG
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38 unsigned long before;
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39
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40 unsigned long (*previous)(unsigned char *, unsigned long , void (*)(void)) = ltc_rng;
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41 ltc_rng = my_test_rng;
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42
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43 before = my_test_rng_read;
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44
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45 if ((err = rng_make_prng(128, find_prng("yarrow"), &yarrow_prng, NULL)) != CRYPT_OK) {
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46 fprintf(stderr, "rng_make_prng with 'my_test_rng' failed: %s\n", error_to_string(err));
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47 exit(EXIT_FAILURE);
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48 }
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49
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50 if (before == my_test_rng_read) {
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51 fprintf(stderr, "somehow there was no read from the ltc_rng! %lu == %lu\n", before, my_test_rng_read);
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52 exit(EXIT_FAILURE);
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53 }
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54
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55 ltc_rng = previous;
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56 #endif
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57
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58 /* test prngs (test, import/export) */
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59 for (x = 0; prng_descriptor[x].name != NULL; x++) {
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60 if(strstr(prng_descriptor[x].name, "no_prng") == prng_descriptor[x].name) continue;
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61 err = CRYPT_OK;
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62 DOX(prng_descriptor[x].test(), prng_descriptor[x].name);
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63 DOX(prng_descriptor[x].start(&nprng), prng_descriptor[x].name);
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64 DOX(prng_descriptor[x].add_entropy((unsigned char *)"helloworld12", 12, &nprng), prng_descriptor[x].name);
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65 DOX(prng_descriptor[x].ready(&nprng), prng_descriptor[x].name);
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66 n = sizeof(buf);
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67 if (strcmp(prng_descriptor[x].name, "sprng")) {
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68 one = 1;
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69 if (prng_descriptor[x].pexport(buf, &one, &nprng) != CRYPT_BUFFER_OVERFLOW) {
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70 fprintf(stderr, "Error testing pexport with a short buffer (%s)\n", prng_descriptor[x].name);
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71 return CRYPT_ERROR;
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72 }
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73 }
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74 DOX(prng_descriptor[x].pexport(buf, &n, &nprng), prng_descriptor[x].name);
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75 prng_descriptor[x].done(&nprng);
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76 DOX(prng_descriptor[x].pimport(buf, n, &nprng), prng_descriptor[x].name);
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77 DOX(prng_descriptor[x].pimport(buf, 4096, &nprng), prng_descriptor[x].name); /* try to import larger data */
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78 DOX(prng_descriptor[x].ready(&nprng), prng_descriptor[x].name);
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79 if (prng_descriptor[x].read(buf, 100, &nprng) != 100) {
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80 fprintf(stderr, "Error reading from imported PRNG (%s)!\n", prng_descriptor[x].name);
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81 return CRYPT_ERROR;
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82 }
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83 prng_descriptor[x].done(&nprng);
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84 }
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85 return err;
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86 }
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87
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88 /* ref: $Format:%D$ */
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89 /* git commit: $Format:%H$ */
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90 /* commit time: $Format:%ai$ */