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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 2common.c
*/
#include "2common.h"
#include "2rsa.h"
#include "2sysincludes.h"
#include "host_common21.h"
#include "host_key21.h"
#include "host_signature21.h"
#include "test_common.h"
static const uint8_t test_data[] = "This is some test data to sign.";
/*
* Test struct packing for vboot_struct.h structs which are passed between
* firmware and OS, or passed between different phases of firmware.
*/
static void test_struct_packing(void)
{
/* Test new struct sizes */
TEST_EQ(EXPECTED_ID_SIZE,
sizeof(struct vb2_id),
"sizeof(vb2_id)");
TEST_EQ(EXPECTED_VB21_STRUCT_COMMON_SIZE,
sizeof(struct vb21_struct_common),
"sizeof(vb21_struct_common)");
TEST_EQ(EXPECTED_VB21_PACKED_KEY_SIZE,
sizeof(struct vb21_packed_key),
"sizeof(vb21_packed_key)");
TEST_EQ(EXPECTED_VB21_SIGNATURE_SIZE,
sizeof(struct vb21_signature),
"sizeof(vb21_signature)");
}
/**
* Common header functions
*/
static void test_common_header_functions(void)
{
uint8_t cbuf[sizeof(struct vb21_struct_common) + 128];
uint8_t cbufgood[sizeof(cbuf)];
struct vb21_struct_common *c = (struct vb21_struct_common *)cbuf;
struct vb21_struct_common *c2;
const char test_desc[32] = "test desc";
uint32_t desc_end, m;
c->total_size = sizeof(cbuf);
c->fixed_size = sizeof(*c);
c->desc_size = sizeof(test_desc);
memcpy(cbuf + c->fixed_size, test_desc, sizeof(test_desc));
desc_end = c->fixed_size + c->desc_size;
c2 = (struct vb21_struct_common *)(cbuf + desc_end);
c2->total_size = c->total_size - desc_end;
c2->fixed_size = sizeof(*c2);
c2->desc_size = 0;
/* Description helper */
TEST_EQ(0, strcmp(vb21_common_desc(c), test_desc), "vb21_common_desc()");
TEST_EQ(0, strcmp(vb21_common_desc(c2), ""), "vb21_common_desc() empty");
TEST_SUCC(vb21_verify_common_header(cbuf, sizeof(cbuf)),
"vb21_verify_common_header() good");
memcpy(cbufgood, cbuf, sizeof(cbufgood));
memcpy(cbuf, cbufgood, sizeof(cbuf));
c->total_size += 4;
TEST_EQ(vb21_verify_common_header(cbuf, sizeof(cbuf)),
VB2_ERROR_COMMON_TOTAL_SIZE,
"vb21_verify_common_header() total size");
memcpy(cbuf, cbufgood, sizeof(cbuf));
c->fixed_size = c->total_size + 4;
TEST_EQ(vb21_verify_common_header(cbuf, sizeof(cbuf)),
VB2_ERROR_COMMON_FIXED_SIZE,
"vb21_verify_common_header() fixed size");
memcpy(cbuf, cbufgood, sizeof(cbuf));
c->desc_size = c->total_size - c->fixed_size + 4;
TEST_EQ(vb21_verify_common_header(cbuf, sizeof(cbuf)),
VB2_ERROR_COMMON_DESC_SIZE,
"vb21_verify_common_header() desc size");
memcpy(cbuf, cbufgood, sizeof(cbuf));
c->total_size--;
TEST_EQ(vb21_verify_common_header(cbuf, sizeof(cbuf)),
VB2_ERROR_COMMON_TOTAL_UNALIGNED,
"vb21_verify_common_header() total unaligned");
memcpy(cbuf, cbufgood, sizeof(cbuf));
c->fixed_size++;
TEST_EQ(vb21_verify_common_header(cbuf, sizeof(cbuf)),
VB2_ERROR_COMMON_FIXED_UNALIGNED,
"vb21_verify_common_header() fixed unaligned");
memcpy(cbuf, cbufgood, sizeof(cbuf));
c->desc_size--;
TEST_EQ(vb21_verify_common_header(cbuf, sizeof(cbuf)),
VB2_ERROR_COMMON_DESC_UNALIGNED,
"vb21_verify_common_header() desc unaligned");
memcpy(cbuf, cbufgood, sizeof(cbuf));
c->desc_size = -4;
TEST_EQ(vb21_verify_common_header(cbuf, sizeof(cbuf)),
VB2_ERROR_COMMON_DESC_WRAPS,
"vb21_verify_common_header() desc wraps");
memcpy(cbuf, cbufgood, sizeof(cbuf));
cbuf[desc_end - 1] = 1;
TEST_EQ(vb21_verify_common_header(cbuf, sizeof(cbuf)),
VB2_ERROR_COMMON_DESC_TERMINATOR,
"vb21_verify_common_header() desc not terminated");
/* Member checking function */
memcpy(cbuf, cbufgood, sizeof(cbuf));
m = 0;
TEST_SUCC(vb21_verify_common_member(cbuf, &m, c->total_size - 8, 4),
"vb21_verify_common_member()");
TEST_EQ(m, c->total_size - 4, " new minimum");
m = desc_end;
TEST_SUCC(vb21_verify_common_member(cbuf, &m, desc_end, 4),
"vb21_verify_common_member() good offset");
TEST_EQ(m, desc_end + 4, " new minimum");
m = 0;
TEST_EQ(vb21_verify_common_member(cbuf, &m, c->total_size - 8, -4),
VB2_ERROR_COMMON_MEMBER_WRAPS,
"vb21_verify_common_member() wraps");
m = 0;
TEST_EQ(vb21_verify_common_member(cbuf, &m, c->total_size - 7, 4),
VB2_ERROR_COMMON_MEMBER_UNALIGNED,
"vb21_verify_common_member() offset unaligned");
m = 0;
TEST_EQ(vb21_verify_common_member(cbuf, &m, c->total_size - 8, 5),
VB2_ERROR_COMMON_MEMBER_UNALIGNED,
"vb21_verify_common_member() size unaligned");
m = 0;
TEST_EQ(vb21_verify_common_member(cbuf, &m, desc_end - 4, 4),
VB2_ERROR_COMMON_MEMBER_OVERLAP,
"vb21_verify_common_member() overlap");
m = desc_end + 4;
TEST_EQ(vb21_verify_common_member(cbuf, &m, desc_end, 4),
VB2_ERROR_COMMON_MEMBER_OVERLAP,
"vb21_verify_common_member() overlap 2");
m = 0;
TEST_EQ(vb21_verify_common_member(cbuf, &m, c->total_size - 4, 8),
VB2_ERROR_COMMON_MEMBER_SIZE,
"vb21_verify_common_member() size");
/* Subobject checking */
m = 0;
TEST_SUCC(vb21_verify_common_subobject(cbuf, &m, desc_end),
"vb21_verify_common_subobject() good offset");
TEST_EQ(m, sizeof(cbuf), " new minimum");
m = desc_end + 4;
TEST_EQ(vb21_verify_common_subobject(cbuf, &m, desc_end),
VB2_ERROR_COMMON_MEMBER_OVERLAP,
"vb21_verify_common_subobject() overlap");
m = 0;
c2->total_size += 4;
TEST_EQ(vb21_verify_common_subobject(cbuf, &m, desc_end),
VB2_ERROR_COMMON_TOTAL_SIZE,
"vb21_verify_common_subobject() size");
}
/**
* Signature size
*/
static void test_sig_size(void)
{
TEST_EQ(vb2_sig_size(VB2_SIG_INVALID, VB2_HASH_SHA256), 0,
"vb2_sig_size() sig invalid");
TEST_EQ(vb2_sig_size(VB2_SIG_RSA2048, VB2_HASH_INVALID), 0,
"vb2_sig_size() hash invalid");
TEST_EQ(vb2_sig_size(VB2_SIG_RSA2048, VB2_HASH_SHA256), 2048 / 8,
"vb2_sig_size() RSA2048");
TEST_EQ(vb2_sig_size(VB2_SIG_RSA4096, VB2_HASH_SHA256), 4096 / 8,
"vb2_sig_size() RSA4096");
TEST_EQ(vb2_sig_size(VB2_SIG_RSA8192, VB2_HASH_SHA512), 8192 / 8,
"vb2_sig_size() RSA8192");
TEST_EQ(vb2_sig_size(VB2_SIG_NONE, VB2_HASH_SHA1),
VB2_SHA1_DIGEST_SIZE, "vb2_sig_size() SHA1");
TEST_EQ(vb2_sig_size(VB2_SIG_NONE, VB2_HASH_SHA256),
VB2_SHA256_DIGEST_SIZE, "vb2_sig_size() SHA256");
TEST_EQ(vb2_sig_size(VB2_SIG_NONE, VB2_HASH_SHA512),
VB2_SHA512_DIGEST_SIZE, "vb2_sig_size() SHA512");
}
/**
* Verify data on bare hash
*/
static void test_verify_hash(void)
{
struct vb21_signature *sig;
const struct vb2_private_key *prik;
struct vb2_public_key pubk;
uint8_t workbuf[VB2_VERIFY_DATA_WORKBUF_BYTES]
__attribute__((aligned(VB2_WORKBUF_ALIGN)));
struct vb2_workbuf wb;
vb2_workbuf_init(&wb, workbuf, sizeof(workbuf));
TEST_SUCC(vb2_private_key_hash(&prik, VB2_HASH_SHA256),
"create private hash key");
TEST_SUCC(vb2_public_key_hash(&pubk, VB2_HASH_SHA256),
"create hash key");
/* Create the signature */
TEST_SUCC(vb21_sign_data(&sig, test_data, sizeof(test_data),
prik, NULL),
"create hash sig");
TEST_SUCC(vb21_verify_data(test_data, sizeof(test_data),
sig, &pubk, &wb),
"vb21_verify_data() hash ok");
*((uint8_t *)sig + sig->sig_offset) ^= 0xab;
TEST_EQ(vb21_verify_data(test_data, sizeof(test_data), sig, &pubk, &wb),
VB2_ERROR_VDATA_VERIFY_DIGEST, "vb21_verify_data() hash bad");
free(sig);
}
int main(int argc, char* argv[])
{
test_struct_packing();
test_common_header_functions();
test_sig_size();
test_verify_hash();
return gTestSuccess ? 0 : 255;
}
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