1 /* test_hmac_prng.c - TinyCrypt implementation of some HMAC-PRNG tests */
2
3 /*
4 * Copyright (C) 2017 by Intel Corporation, All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of Intel Corporation nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 DESCRIPTION
35 This module tests the following PRNG routines:
36
37 Scenarios tested include:
38 - HMAC-PRNG init
39 - HMAC-PRNG reseed
40 - HMAC-PRNG generate)
41 */
42
43 #include <tinycrypt/hmac_prng.h>
44 #include <tinycrypt/constants.h>
45 #include <test_utils.h>
46
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50
51 #define TC_DEBUG_MODE 0
52
53 #ifdef TC_DEBUG_MODE
show(const char * label,const uint8_t * s,size_t len)54 void show(const char *label, const uint8_t *s, size_t len)
55 {
56 unsigned int i;
57 printf ("%s = ", label);
58 for (i = 0; i < (unsigned int) len; ++i) {
59 printf ("%02x", s[i]);
60 }
61 printf ("\n");
62 }
63
printBinaryFile(const uint8_t * s,unsigned int slen)64 void printBinaryFile(const uint8_t *s, unsigned int slen)
65 {
66 FILE *write_ptr;
67 write_ptr = fopen("pseudo-random-data.bin","wb");
68 fwrite(s, slen, 1, write_ptr);
69 }
70 #endif
71
72 /*
73 * Main task to test AES
74 */
main(void)75 int main(void)
76 {
77 uint8_t seed[128];
78 struct tc_hmac_prng_struct h;
79 unsigned int size = (1 << 19);
80 uint8_t random[size];
81 unsigned int i;
82 unsigned int result = TC_PASS;
83
84 TC_START("Performing HMAC-PRNG tests:");
85 TC_PRINT("HMAC-PRNG test#1 (init, reseed, generate):\n");
86
87 /* Fake seed (replace by a a truly random seed): */
88 for (i = 0; i < (unsigned int) sizeof(seed); ++i) {
89 seed[i] = i;
90 }
91
92 /* Fake personalization and additional_input (replace by appropriate
93 * values): *
94 * e.g.: hostname+timestamp */
95 uint8_t *personalization = (uint8_t *) "HOSTNAME";
96 uint8_t *additional_input = (uint8_t *) "additional input";
97
98 TC_PRINT("HMAC-PRNG test#1 (init):\n");
99 if (tc_hmac_prng_init(&h, personalization,
100 sizeof(personalization)) == 0) {
101 TC_ERROR("HMAC-PRNG initialization failed.\n");
102 result = TC_FAIL;
103 goto exitTest;
104 }
105 TC_END_RESULT(result);
106
107 TC_PRINT("HMAC-PRNG test#1 (reseed):\n");
108 if (tc_hmac_prng_reseed(&h, seed, sizeof(seed), additional_input,
109 sizeof(additional_input)) == 0) {
110 TC_ERROR("HMAC-PRNG reseed failed.\n");
111 result = TC_FAIL;
112 goto exitTest;
113 }
114
115 TC_END_RESULT(result);
116
117 TC_PRINT("HMAC-PRNG test#1 (generate):\n");
118 if (tc_hmac_prng_generate(random, size, &h) < 1) {
119 TC_ERROR("HMAC-PRNG generate failed.\n");
120 result = TC_FAIL;
121 goto exitTest;
122 }
123 TC_END_RESULT(result);
124
125 #ifdef TC_DEBUG_MODE
126 printBinaryFile(random, size);
127 show ("Pseudo-random data", random, size);
128 #endif
129
130 TC_PRINT("All HMAC tests succeeded!\n");
131
132 exitTest:
133 TC_END_RESULT(result);
134 TC_END_REPORT(result);
135 }
136
