aboutsummaryrefslogtreecommitdiff
path: root/tftf/tests/runtime_services/standard_service/trng/api_tests/test_trng.c
blob: f2f46570c14b9002a7a4ffbfd9bd0761c6eca039 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/*
 * Copyright (c) 2021, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <arch_helpers.h>
#include <assert.h>
#include <debug.h>
#include <platform.h>
#include <psci.h>
#include <smccc.h>
#include <string.h>
#include <errno.h>
#include <tftf_lib.h>
#include <trng.h>

/*
 * @Test_Aim@ exercise TRNG Version SMC.
 *
 * This test should exercise the trng version call. Versions before 1.0 don't
 * exsit, so should fail. This should also skip if TRNG is not implemented.
 */
test_result_t test_trng_version(void)
{
	int32_t version = tftf_trng_version();

	if (version > 0 && version < TRNG_VERSION(1, 0)) {
		return TEST_RESULT_FAIL;
	}
	if (version < 0 && version == TRNG_E_NOT_SUPPORTED) {
		return TEST_RESULT_SKIPPED;
	}
	return TEST_RESULT_SUCCESS;
}

/*
 * @Test_Aim@ Verify that TRNG reports implemented functions.
 *
 * Check that TRNG Fetures reports that the TRNG extension:
 *  - reports implementing functions that we know for sure exist, such as TRNG
 *    Features itself
 *  - reports not implementing functions that are part of other standards
 */
test_result_t test_trng_features(void)
{
	int32_t version = tftf_trng_version();

	if (version < 0 && version == TRNG_E_NOT_SUPPORTED) {
		return TEST_RESULT_SKIPPED;
	}
	if (!tftf_trng_feature_implemented(SMC_TRNG_FEATURES)) {
		return TEST_RESULT_FAIL;
	}
	if (tftf_trng_feature_implemented(SMC_PSCI_SYSTEM_RESET)) {
		return TEST_RESULT_FAIL;
	}
	return TEST_RESULT_SUCCESS;
}

/*
 * @Test_Aim@ TRNG_RND Meets the Zero-fill requirements of the spec
 */
#ifndef __aarch64__
test_result_t test_trng_rnd(void)
{
	int32_t version = tftf_trng_version();
	smc_ret_values rnd_out;

	if (version < 0 && version == TRNG_E_NOT_SUPPORTED) {
		return TEST_RESULT_SKIPPED;
	}
	if (!tftf_trng_feature_implemented(SMC_TRNG_RND)) {
		return TEST_RESULT_SKIPPED;
	}
	rnd_out = tftf_trng_rnd(U(0));
	if (rnd_out.ret0 != TRNG_E_INVALID_PARAMS) {
		ERROR("RND 0 returned 0x%x\n", (uint32_t) rnd_out.ret0);
		return TEST_RESULT_FAIL;
	}
	rnd_out = tftf_trng_rnd(U(1024));
	if (rnd_out.ret0 != TRNG_E_INVALID_PARAMS) {
		ERROR("RND 1024 returned 0x%x\n", (uint32_t) rnd_out.ret0);
		return TEST_RESULT_FAIL;
	}
	rnd_out = tftf_trng_rnd(U(1));
	if (rnd_out.ret0 == TRNG_E_NO_ENTOPY) {
		WARN("There is not a single bit of entropy\n");
		return TEST_RESULT_SKIPPED;
	}
	if ((rnd_out.ret1 & 0xFFFFFFFF) != 0) {
		ERROR("non-zero w1 value 0x%x\n", (uint32_t) rnd_out.ret1);
		return TEST_RESULT_FAIL;
	}
	if ((rnd_out.ret2 & 0xFFFFFFFF) != 0) {
		ERROR("non-zero w2 value 0x%x\n", (uint32_t) rnd_out.ret2);
		return TEST_RESULT_FAIL;
	}
	if ((rnd_out.ret3 & 0xFFFFFFFE) != 0) {
	/* Note: there's an "E" here ^, because we asked for the least
	 * significant bit to be random by passing a "1" to the RND function
	 */
		ERROR("Unexpected w3 value 0x%x\n", (uint32_t) rnd_out.ret3);
		return TEST_RESULT_FAIL;
	}
	return TEST_RESULT_SUCCESS;
}

#else
test_result_t test_trng_rnd(void)
{
	int32_t version = tftf_trng_version();
	smc_ret_values rnd_out;

	if (version < 0 && version == TRNG_E_NOT_SUPPORTED) {
		return TEST_RESULT_SKIPPED;
	}
	if (!tftf_trng_feature_implemented(SMC_TRNG_RND)) {
		return TEST_RESULT_SKIPPED;
	}
	rnd_out = tftf_trng_rnd(U(0));
	if (rnd_out.ret0 != TRNG_E_INVALID_PARAMS) {
		ERROR("RND 0 returned 0x%lx\n", rnd_out.ret0);
		return TEST_RESULT_FAIL;
	}
	rnd_out = tftf_trng_rnd(U(1024));
	if (rnd_out.ret0 != TRNG_E_INVALID_PARAMS) {
		ERROR("RND 1024 returned 0x%lx\n", rnd_out.ret0);
		return TEST_RESULT_FAIL;
	}
	rnd_out = tftf_trng_rnd(U(1));
	if (rnd_out.ret0 == TRNG_E_NO_ENTOPY) {
		WARN("There is not a single bit of entropy\n");
		return TEST_RESULT_SKIPPED;
	}
	if ((rnd_out.ret1 & 0xFFFFFFFFFFFFFFFF) != 0) {
		ERROR("non-zero x1 value 0x%lx\n", rnd_out.ret1);
		return TEST_RESULT_FAIL;
	}
	if ((rnd_out.ret2 & 0xFFFFFFFFFFFFFFFF) != 0) {
		ERROR("non-zero x2 value 0x%lx\n", rnd_out.ret2);
		return TEST_RESULT_FAIL;
	}
	if ((rnd_out.ret3 & 0xFFFFFFFFFFFFFFFE) != 0) {
		ERROR("Unexpected x3 value 0x%lx\n", rnd_out.ret3);
		return TEST_RESULT_FAIL;
	}
	return TEST_RESULT_SUCCESS;
}
#endif