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/* Copyright (c) 2011 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 EC firmware vboot stuff.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cryptolib.h"
#include "file_keys.h"
#include "host_common.h"
#include "test_common.h"
#include "vboot_common.h"
static void ReSignECPreamble(VbECPreambleHeader* h,
const VbPrivateKey* key) {
VbSignature *sig = CalculateSignature((const uint8_t*)h,
h->preamble_signature.data_size, key);
SignatureCopy(&h->preamble_signature, sig);
free(sig);
}
static void VerifyECPreambleTest(const VbPublicKey* public_key,
const VbPrivateKey* private_key) {
VbECPreambleHeader* hdr;
VbECPreambleHeader* h;
RSAPublicKey* rsa;
unsigned hsize;
/* Create a dummy signature */
VbSignature* body_sig = SignatureAlloc(56, 78);
rsa = PublicKeyToRSA(public_key);
hdr = CreateECPreamble(0x1234, body_sig, private_key,
0x5678, "Foo bar");
TEST_NEQ(hdr && rsa, 0, "VerifyECPreamble() prerequisites");
if (!hdr)
return;
hsize = (unsigned) hdr->preamble_size;
h = (VbECPreambleHeader*)malloc(hsize + 16384);
TEST_EQ(VerifyECPreamble(hdr, hsize, rsa), 0,
"VerifyECPreamble() ok using key");
TEST_NEQ(VerifyECPreamble(hdr, hsize - 1, rsa), 0,
"VerifyECPreamble() size--");
TEST_EQ(VerifyECPreamble(hdr, hsize + 1, rsa), 0,
"VerifyECPreamble() size++");
TEST_EQ(hdr->firmware_version, 0x1234,
"VerifyECPreamble() firmware version");
TEST_EQ(hdr->flags, 0x5678,
"VerifyECPreamble() flags");
TEST_EQ(strncmp(hdr->name, "Foo bar", sizeof(hdr->name)), 0,
"VerifyECPreamble() name");
/* Care about major version but not minor */
Memcpy(h, hdr, hsize);
h->header_version_major++;
ReSignECPreamble(h, private_key);
TEST_NEQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() major++");
Memcpy(h, hdr, hsize);
h->header_version_major--;
ReSignECPreamble(h, private_key);
TEST_NEQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() major--");
Memcpy(h, hdr, hsize);
h->header_version_minor++;
ReSignECPreamble(h, private_key);
TEST_EQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() minor++");
Memcpy(h, hdr, hsize);
h->header_version_minor--;
ReSignECPreamble(h, private_key);
TEST_EQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() minor--");
/* Check signature */
Memcpy(h, hdr, hsize);
h->preamble_signature.sig_offset = hsize;
ReSignECPreamble(h, private_key);
TEST_NEQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() sig off end");
Memcpy(h, hdr, hsize);
h->preamble_signature.sig_size--;
ReSignECPreamble(h, private_key);
TEST_NEQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() sig too small");
Memcpy(h, hdr, hsize);
GetSignatureData(&h->body_digest)[0] ^= 0x34;
TEST_NEQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() sig mismatch");
/* Check that we signed header and body sig */
Memcpy(h, hdr, hsize);
h->preamble_signature.data_size = 4;
h->body_digest.sig_offset = 0;
h->body_digest.sig_size = 0;
ReSignECPreamble(h, private_key);
TEST_NEQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() didn't sign header");
Memcpy(h, hdr, hsize);
h->body_digest.sig_offset = hsize;
ReSignECPreamble(h, private_key);
TEST_NEQ(VerifyECPreamble(h, hsize, rsa), 0,
"VerifyECPreamble() body sig off end");
/* TODO: verify with extra padding at end of header. */
free(h);
RSAPublicKeyFree(rsa);
free(hdr);
}
int main(int argc, char* argv[]) {
VbPrivateKey* signing_private_key = NULL;
VbPublicKey* signing_public_key = NULL;
int error_code = 0;
if(argc != 3) {
fprintf(stderr, "Usage: %s <signing privkey> <signing pubkey>", argv[0]);
return -1;
}
signing_private_key = PrivateKeyRead(argv[1]);
if (!signing_private_key) {
fprintf(stderr, "Error reading signing_private_key\n");
return 1;
}
signing_public_key = PublicKeyRead(argv[2]);
if (!signing_public_key) {
fprintf(stderr, "Error reading signing_public_key\n");
return 1;
}
VerifyECPreambleTest(signing_public_key, signing_private_key);
if (signing_public_key)
free(signing_public_key);
if (signing_private_key)
free(signing_private_key);
return error_code;
}
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