firmware/stub/vboot_api_stub.c

/* Copyright (c) 2013 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.
 *
 * Stub implementations of firmware-provided API functions.
 */

#define _STUB_IMPLEMENTATION_

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#include "vboot_api.h"

/* disable MSVC warnings on unused arguments */
__pragma(warning (disable: 4100))


/* U-Boot's printf uses '%L' for uint64_t. gcc uses '%l'. */
#define MAX_FMT 255
static char fmtbuf[MAX_FMT+1];

static const char *fixfmt(const char *format)
{
	int i;
	for(i=0; i<MAX_FMT && format[i]; i++) {
		fmtbuf[i] = format[i];
		if(format[i] == '%' && format[i+1] == 'L') {
			fmtbuf[i+1] = 'l';
			i++;
		}
	}
	fmtbuf[i] = '\0';
	return fmtbuf;
}

void VbExError(const char *format, ...)
{
	va_list ap;
	va_start(ap, format);
	fprintf(stderr, "ERROR: ");
	vfprintf(stderr, fixfmt(format), ap);
	va_end(ap);
	exit(1);
}

void VbExDebug(const char *format, ...)
{
	va_list ap;
	va_start(ap, format);
	fprintf(stderr, "DEBUG: ");
	vfprintf(stderr, fixfmt(format), ap);
	va_end(ap);
}

void *VbExMalloc(size_t size)
{
	void *p = malloc(size);
	if (!p) {
		/* Fatal Error. We must abort. */
		abort();
	}
	return p;
}

void VbExFree(void *ptr)
{
	free(ptr);
}

uint64_t VbExGetTimer(void)
{
	struct timeval tv;
	gettimeofday(&tv, NULL);
	return (uint64_t)tv.tv_sec * 1000000 + (uint64_t)tv.tv_usec;
}

void VbExSleepMs(uint32_t msec)
{
}

VbError_t VbExBeep(uint32_t msec, uint32_t frequency)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExNvStorageRead(uint8_t *buf)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExNvStorageWrite(const uint8_t *buf)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExHashFirmwareBody(VbCommonParams *cparams,
                               uint32_t firmware_index)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExDisplayInit(uint32_t *width, uint32_t *height)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExDisplayBacklight(uint8_t enable)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExDisplayScreen(uint32_t screen_type)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExDisplayImage(uint32_t x, uint32_t y,
                           void *buffer, uint32_t buffersize)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExDisplayDebugInfo(const char *info_str)
{
	return VBERROR_SUCCESS;
}

uint32_t VbExKeyboardRead(void)
{
	return 0;
}

uint32_t VbExIsShutdownRequested(void)
{
	return 0;
}

VbError_t VbExDecompress(void *inbuf, uint32_t in_size,
                         uint32_t compression_type,
                         void *outbuf, uint32_t *out_size)
{
	return VBERROR_SUCCESS;
}

int VbExTrustEC(void)
{
	return 1;
}

VbError_t VbExEcRunningRW(int *in_rw)
{
	*in_rw = 0;
	return VBERROR_SUCCESS;
}

VbError_t VbExEcJumpToRW(void)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExEcRebootToRO(void)
{
	/* Nothing to reboot, so all we can do is return failure. */
	return VBERROR_UNKNOWN;
}

VbError_t VbExEcStayInRO(void)
{
	return VBERROR_SUCCESS;
}

#define SHA256_HASH_SIZE 32

VbError_t VbExEcHashRW(const uint8_t **hash, int *hash_size)
{
	static const uint8_t fake_hash[32] = {1, 2, 3, 4};

	*hash = fake_hash;
	*hash_size = sizeof(fake_hash);
	return VBERROR_SUCCESS;
}

VbError_t VbExEcGetExpectedRW(enum VbSelectFirmware_t select,
                              const uint8_t **image, int *image_size)
{
	static uint8_t fake_image[64] = {5, 6, 7, 8};
	*image = fake_image;
	*image_size = sizeof(fake_image);
	return VBERROR_SUCCESS;
}

VbError_t VbExEcGetExpectedRWHash(enum VbSelectFirmware_t select,
				  const uint8_t **hash, int *hash_size)
{
	static const uint8_t fake_hash[32] = {1, 2, 3, 4};

	*hash = fake_hash;
	*hash_size = sizeof(fake_hash);
	return VBERROR_SUCCESS;
}

VbError_t VbExEcUpdateRW(const uint8_t *image, int image_size)
{
	return VBERROR_SUCCESS;
}

VbError_t VbExEcProtectRW(void)
{
	return VBERROR_SUCCESS;
}

int VbExLegacy(void)
{
	return 1;
}