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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Tests for firmware image library.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "2rsa.h"
#include "2sysincludes.h"
#include "file_keys.h"
#include "host_common.h"
#include "host_key2.h"
#include "test_common.h"
#include "vb2_common.h"
static const uint8_t test_data[] = "This is some test data to sign.";
static const uint32_t test_size = sizeof(test_data);
static void test_unpack_key(const struct vb2_packed_key *key1)
{
struct vb2_public_key pubk;
/*
* Key data follows the header for a newly allocated key, so we can
* calculate the buffer size by looking at how far the key data goes.
*/
uint32_t size = key1->key_offset + key1->key_size;
uint8_t *buf = malloc(size);
struct vb2_packed_key *key = (struct vb2_packed_key *)buf;
memcpy(key, key1, size);
TEST_SUCC(vb2_unpack_key_buffer(&pubk, buf, size),
"vb2_unpack_key_buffer() ok");
TEST_EQ(pubk.sig_alg, vb2_crypto_to_signature(key->algorithm),
"vb2_unpack_key_buffer() sig_alg");
TEST_EQ(pubk.hash_alg, vb2_crypto_to_hash(key->algorithm),
"vb2_unpack_key_buffer() hash_alg");
memcpy(key, key1, size);
key->algorithm = VB2_ALG_COUNT;
TEST_EQ(vb2_unpack_key_buffer(&pubk, buf, size),
VB2_ERROR_UNPACK_KEY_SIG_ALGORITHM,
"vb2_unpack_key_buffer() invalid algorithm");
memcpy(key, key1, size);
key->key_size--;
TEST_EQ(vb2_unpack_key_buffer(&pubk, buf, size),
VB2_ERROR_UNPACK_KEY_SIZE,
"vb2_unpack_key_buffer() invalid size");
memcpy(key, key1, size);
key->key_offset++;
TEST_EQ(vb2_unpack_key_buffer(&pubk, buf, size + 1),
VB2_ERROR_UNPACK_KEY_ALIGN,
"vb2_unpack_key_buffer() unaligned data");
memcpy(key, key1, size);
*(uint32_t *)(buf + key->key_offset) /= 2;
TEST_EQ(vb2_unpack_key_buffer(&pubk, buf, size),
VB2_ERROR_UNPACK_KEY_ARRAY_SIZE,
"vb2_unpack_key_buffer() invalid key array size");
memcpy(key, key1, size);
TEST_EQ(vb2_unpack_key_buffer(&pubk, buf, size - 1),
VB2_ERROR_INSIDE_DATA_OUTSIDE,
"vb2_unpack_key_buffer() buffer too small");
free(key);
TEST_EQ(vb2_unpack_key(&pubk, NULL),
VB2_ERROR_UNPACK_KEY_BUFFER,
"vb2_unpack_key_() buffer NULL");
}
static void test_verify_data(const struct vb2_packed_key *key1,
const struct vb2_signature *sig)
{
uint8_t workbuf[VB2_VERIFY_DATA_WORKBUF_BYTES]
__attribute__((aligned(VB2_WORKBUF_ALIGN)));
struct vb2_workbuf wb;
struct vb2_public_key pubk, pubk_orig;
uint32_t sig_total_size = sig->sig_offset + sig->sig_size;
struct vb2_signature *sig2;
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
/* Allocate signature copy for tests */
sig2 = (struct vb2_signature *)malloc(sig_total_size);
TEST_SUCC(vb2_unpack_key(&pubk, key1), "vb2_verify_data() unpack key");
pubk_orig = pubk;
memcpy(sig2, sig, sig_total_size);
pubk.sig_alg = VB2_SIG_INVALID;
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
0, "vb2_verify_data() bad sig alg");
pubk.sig_alg = pubk_orig.sig_alg;
memcpy(sig2, sig, sig_total_size);
pubk.hash_alg = VB2_HASH_INVALID;
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
0, "vb2_verify_data() bad hash alg");
pubk.hash_alg = pubk_orig.hash_alg;
vb2_workbuf_init(&wb, workbuf, 4);
memcpy(sig2, sig, sig_total_size);
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
0, "vb2_verify_data() workbuf too small");
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
memcpy(sig2, sig, sig_total_size);
TEST_EQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
0, "vb2_verify_data() ok");
memcpy(sig2, sig, sig_total_size);
sig2->sig_size -= 16;
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
0, "vb2_verify_data() wrong sig size");
memcpy(sig2, sig, sig_total_size);
TEST_NEQ(vb2_verify_data(test_data, test_size - 1, sig2, &pubk, &wb),
0, "vb2_verify_data() input buffer too small");
memcpy(sig2, sig, sig_total_size);
vb2_signature_data_mutable(sig2)[0] ^= 0x5A;
TEST_NEQ(vb2_verify_data(test_data, test_size, sig2, &pubk, &wb),
0, "vb2_verify_data() wrong sig");
free(sig2);
}
static int test_algorithm(int key_algorithm, const char *keys_dir)
{
char filename[1024];
struct vb2_private_key *private_key = NULL;
struct vb2_signature *sig = NULL;
struct vb2_packed_key *key1 = NULL;
int retval = 1;
printf("***Testing algorithm: %s\n",
vb2_get_crypto_algorithm_name(key_algorithm));
snprintf(filename, sizeof(filename), "%s/key_%s.pem",
keys_dir,
vb2_get_crypto_algorithm_file(key_algorithm));
private_key = vb2_read_private_key_pem(filename, key_algorithm);
if (!private_key) {
fprintf(stderr, "Error reading private_key: %s\n", filename);
goto cleanup_algorithm;
}
snprintf(filename, sizeof(filename), "%s/key_%s.keyb",
keys_dir,
vb2_get_crypto_algorithm_file(key_algorithm));
key1 = vb2_read_packed_keyb(filename, key_algorithm, 1);
if (!key1) {
fprintf(stderr, "Error reading public_key: %s\n", filename);
goto cleanup_algorithm;
}
/* Calculate good signatures */
sig = vb2_calculate_signature(test_data, sizeof(test_data),
private_key);
TEST_PTR_NEQ(sig, 0, "Calculate signature");
if (!sig)
goto cleanup_algorithm;
test_unpack_key(key1);
test_verify_data(key1, sig);
retval = 0;
cleanup_algorithm:
if (key1)
free(key1);
if (private_key)
free(private_key);
if (sig)
free(sig);
return retval;
}
/* Test only the algorithms we use */
const int key_algs[] = {
VB2_ALG_RSA2048_SHA256,
VB2_ALG_RSA4096_SHA256,
VB2_ALG_RSA8192_SHA512,
};
int main(int argc, char *argv[]) {
if (argc == 2) {
int i;
for (i = 0; i < ARRAY_SIZE(key_algs); i++) {
if (test_algorithm(key_algs[i], argv[1]))
return 1;
}
} else if (argc == 3 && !strcasecmp(argv[2], "--all")) {
/* Test all the algorithms */
int alg;
for (alg = 0; alg < VB2_ALG_COUNT; alg++) {
if (test_algorithm(alg, argv[1]))
return 1;
}
} else {
fprintf(stderr, "Usage: %s <keys_dir> [--all]", argv[0]);
return -1;
}
return gTestSuccess ? 0 : 255;
}
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