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annotate libtomcrypt/tests/pkcs_1_test.c @ 1861:2b3a8026a6ce

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Add re-exec for server This allows ASLR to re-randomize the address space for every connection, preventing some vulnerabilities from being exploitable by repeated probing. Overhead (memory and time) is yet to be confirmed. At present this is only enabled on Linux. Other BSD platforms with fexecve() would probably also work though have not been tested.
author Matt Johnston <matt@ucc.asn.au>
date Sun, 30 Jan 2022 10:14:56 +0800
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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_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: $Format:%ai$ */