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/*
* Copyright (c) 2009-2013, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google, Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/stat.h>
#include <fcntl.h>
#include <inttypes.h>
#include <sys/mman.h>
#include "flash.h"
#include "protocol.h"
#include "debug.h"
#include "utils.h"
#include "commands/partitions.h"
#ifdef FLASH_CERT
#include "secure.h"
#endif
#define ALLOWED_CHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_-."
#define BUFFER_SIZE 1024 * 1024
#define MIN(a, b) (a > b ? b : a)
int flash_find_entry(const char *name, char *out, size_t outlen)
{
//TODO: Assumption: All the partitions has they unique name
const char *path = fastboot_getvar("device-directory");
size_t length;
if (strcmp(path, "") == 0) {
D(ERR, "device-directory: not defined in config file");
return -1;
}
length = strspn(name, ALLOWED_CHARS);
if (length != strlen(name)) {
D(ERR, "Not allowed char in name: %c", name[length]);
return -1;
}
if (snprintf(out, outlen, "%s%s", path, name) >= (int) outlen) {
D(ERR, "Too long path to partition file");
return -1;
}
if (access(out, F_OK ) == -1) {
D(ERR, "could not find partition file %s", name);
return -1;
}
return 0;
}
int flash_erase(int fd)
{
int64_t size;
size = get_block_device_size(fd);
D(DEBUG, "erase %"PRId64" data from %d\n", size, fd);
return wipe_block_device(fd, size);
}
int flash_write(int partition_fd, int data_fd, ssize_t size, ssize_t skip)
{
ssize_t written = 0;
struct GPT_mapping input;
struct GPT_mapping output;
while (written < size) {
int current_size = MIN(size - written, BUFFER_SIZE);
if (gpt_mmap(&input, written + skip, current_size, data_fd)) {
D(ERR, "Error in writing data, unable to map data file %zd at %zd size %d", size, skip, current_size);
return -1;
}
if (gpt_mmap(&output, written, current_size, partition_fd)) {
D(ERR, "Error in writing data, unable to map output partition");
return -1;
}
memcpy(output.ptr, input.ptr, current_size);
gpt_unmap(&input);
gpt_unmap(&output);
written += current_size;
}
return 0;
}
#ifdef FLASH_CERT
int flash_validate_certificate(int signed_fd, int *data_fd) {
int ret = 0;
const char *cert_path;
X509_STORE *store = NULL;
CMS_ContentInfo *content_info;
BIO *content;
cert_path = fastboot_getvar("certificate-path");
if (!strcmp(cert_path, "")) {
D(ERR, "could not find cert-key value in config file");
goto finish;
}
store = cert_store_from_path(cert_path);
if (store == NULL) {
D(ERR, "unable to create certification store");
goto finish;
}
if (cert_read(signed_fd, &content_info, &content)) {
D(ERR, "reading data failed");
goto finish;
}
ret = cert_verify(content, content_info, store, data_fd);
cert_release(content, content_info);
return ret;
finish:
if (store != NULL)
cert_release_store(store);
return ret;
}
#else
int flash_validate_certificate(int signed_fd, int *data_fd) {
return 1;
}
#endif
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