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annotate libtomcrypt/tests/pkcs_1_test.c @ 1606:98d2b125eb89

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kexhashbuf was much to small in kex fuzzers
author Matt Johnston <matt@ucc.asn.au>
date Thu, 08 Mar 2018 23:23:19 +0800
parents 6dba84798cd5
children
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1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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_PKCS_1
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12
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13 #ifdef LTC_TEST_REAL_RAND
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14 #define LTC_TEST_RAND_SEED time(NULL)
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15 #else
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16 #define LTC_TEST_RAND_SEED 23
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17 #endif
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18
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19 int pkcs_1_test(void)
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20 {
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21 unsigned char buf[3][128];
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22 int res1, res2, res3, prng_idx, hash_idx;
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23 unsigned long x, y, l1, l2, l3, i1, i2, lparamlen, saltlen, modlen;
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24 static const unsigned char lparam[] = { 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 };
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25
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26 /* get hash/prng */
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27 hash_idx = find_hash("sha1");
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28 prng_idx = find_prng("yarrow");
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29
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30 if (hash_idx == -1 || prng_idx == -1) {
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31 fprintf(stderr, "pkcs_1 tests require sha1/yarrow");
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32 return 1;
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33 }
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34
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35 srand(LTC_TEST_RAND_SEED);
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36 /* do many tests */
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37 for (x = 0; x < 100; x++) {
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38 zeromem(buf, sizeof(buf));
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39
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40 /* make a dummy message (of random length) */
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41 l3 = (rand() & 31) + 8;
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42 for (y = 0; y < l3; y++) buf[0][y] = rand() & 255;
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43
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44 /* pick a random lparam len [0..16] */
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45 lparamlen = abs(rand()) % 17;
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46
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47 /* pick a random saltlen 0..16 */
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48 saltlen = abs(rand()) % 17;
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49
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50 /* PKCS #1 v2.0 supports modlens not multiple of 8 */
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51 modlen = 800 + (abs(rand()) % 224);
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52
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53 /* encode it */
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54 l1 = sizeof(buf[1]);
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55 DO(pkcs_1_oaep_encode(buf[0], l3, lparam, lparamlen, modlen, &yarrow_prng, prng_idx, hash_idx, buf[1], &l1));
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56
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57 /* decode it */
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58 l2 = sizeof(buf[2]);
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59 DO(pkcs_1_oaep_decode(buf[1], l1, lparam, lparamlen, modlen, hash_idx, buf[2], &l2, &res1));
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60
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61 if (res1 != 1 || l2 != l3 || memcmp(buf[2], buf[0], l3) != 0) {
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62 fprintf(stderr, "Outsize == %lu, should have been %lu, res1 = %d, lparamlen = %lu, msg contents follow.\n", l2, l3, res1, lparamlen);
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63 fprintf(stderr, "ORIGINAL:\n");
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64 for (x = 0; x < l3; x++) {
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65 fprintf(stderr, "%02x ", buf[0][x]);
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66 }
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67 fprintf(stderr, "\nRESULT:\n");
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68 for (x = 0; x < l2; x++) {
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69 fprintf(stderr, "%02x ", buf[2][x]);
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70 }
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71 fprintf(stderr, "\n\n");
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72 return 1;
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73 }
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74
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75 /* test PSS */
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76 l1 = sizeof(buf[1]);
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77 DO(pkcs_1_pss_encode(buf[0], l3, saltlen, &yarrow_prng, prng_idx, hash_idx, modlen, buf[1], &l1));
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78 DO(pkcs_1_pss_decode(buf[0], l3, buf[1], l1, saltlen, hash_idx, modlen, &res1));
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79
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80 buf[0][i1 = abs(rand()) % l3] ^= 1;
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81 DO(pkcs_1_pss_decode(buf[0], l3, buf[1], l1, saltlen, hash_idx, modlen, &res2));
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82
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83 buf[0][i1] ^= 1;
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84 buf[1][i2 = abs(rand()) % (l1 - 1)] ^= 1;
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85 pkcs_1_pss_decode(buf[0], l3, buf[1], l1, saltlen, hash_idx, modlen, &res3);
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86 if (!(res1 == 1 && res2 == 0 && res3 == 0)) {
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87 fprintf(stderr, "PSS failed: %d, %d, %d, %lu, %lu\n", res1, res2, res3, l3, saltlen);
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88 return 1;
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89 }
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90 }
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91 return 0;
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92 }
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93
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94 #else
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95
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96 int pkcs_1_test(void)
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97 {
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98 return CRYPT_NOP;
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99 }
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100
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101 #endif
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102
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103
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104 /* ref: $Format:%D$ */
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105 /* git commit: $Format:%H$ */
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106 /* commit time: $Format:%ai$ */