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No need to calculate the hash value of file_contexts

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The file_contexts' hash value is no longer used. So remove it.

Test: compile
Change-Id: I6f2c59a712377bef698fd87ebf38cc4dfbf9ee0c
Signed-off-by: liwugang <liwugang@xiaomi.com>
This commit is contained in:
liwugang 2019-04-23 14:13:32 +08:00
parent 8c158034dd
commit 84cf5d7a34
1 changed files with 0 additions and 74 deletions
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74
libselinux/src/android/android_platform.c
View file

@ -72,76 +72,6 @@ static char const * const seapp_contexts_odm[] = {
"/odm_seapp_contexts"
};
uint8_t fc_digest[FC_DIGEST_SIZE];
static bool compute_file_contexts_hash(uint8_t c_digest[], const struct selinux_opt *opts, unsigned nopts)
{
int fd = -1;
void *map = MAP_FAILED;
bool ret = false;
uint8_t *fc_data = NULL;
size_t total_size = 0;
struct stat sb;
size_t i;
for (i = 0; i < nopts; i++) {
fd = open(opts[i].value, O_CLOEXEC | O_RDONLY);
if (fd < 0) {
selinux_log(SELINUX_ERROR, "SELinux: Could not open %s: %s\n",
opts[i].value, strerror(errno));
goto cleanup;
}
if (fstat(fd, &sb) < 0) {
selinux_log(SELINUX_ERROR, "SELinux: Could not stat %s: %s\n",
opts[i].value, strerror(errno));
goto cleanup;
}
if (sb.st_size == 0) {
selinux_log(SELINUX_WARNING, "SELinux: Skipping %s: empty file\n",
opts[i].value);
goto nextfile;
}
map = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (map == MAP_FAILED) {
selinux_log(SELINUX_ERROR, "SELinux: Could not map %s: %s\n",
opts[i].value, strerror(errno));
goto cleanup;
}
fc_data = realloc(fc_data, total_size + sb.st_size);
if (!fc_data) {
selinux_log(SELINUX_ERROR, "SELinux: Count not re-alloc for %s: %s\n",
opts[i].value, strerror(errno));
goto cleanup;
}
memcpy(fc_data + total_size, map, sb.st_size);
total_size += sb.st_size;
/* reset everything for next file */
munmap(map, sb.st_size);
nextfile:
close(fd);
map = MAP_FAILED;
fd = -1;
}
SHA1(fc_data, total_size, c_digest);
ret = true;
cleanup:
if (map != MAP_FAILED)
munmap(map, sb.st_size);
if (fd >= 0)
close(fd);
free(fc_data);
return ret;
}
static struct selabel_handle* selinux_android_file_context(const struct selinux_opt *opts,
unsigned nopts)
{
@ -158,10 +88,6 @@ static struct selabel_handle* selinux_android_file_context(const struct selinux_
__FUNCTION__, strerror(errno));
return NULL;
}
if (!compute_file_contexts_hash(fc_digest, opts, nopts)) {
selabel_close(sehandle);
return NULL;
}
selinux_log(SELINUX_INFO, "SELinux: Loaded file_contexts\n");