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Verifying checksum tags of superblock and tree if available and enabled.

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New API call iso_md5_match().
This commit is contained in:
Thomas Schmitt
2009-08-18 17:03:33 +02:00
parent 868005ed0e
commit 8b800094af
6 changed files with 249 additions and 25 deletions
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25
libisofs/md5.c
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@@ -16,6 +16,7 @@
#include "messages.h"
#include "ecma119.h"
#include "image.h"
#include "util.h"
#include "md5.h"
@@ -386,6 +387,18 @@ int iso_md5_end(void **md5_context, char result[16])
}
/* API */
int iso_md5_match(char first_md5[16], char second_md5[16])
{
int i;
for (i= 0; i < 16; i++)
if (first_md5[i] != second_md5[i])
return 0;
return 1;
}
/* ----------------------------------------------------------------------- */
@@ -667,15 +680,10 @@ int iso_md5_write_tag(Ecma119Image *t, int flag)
#ifdef Libisofs_with_checksumS
int res, mode, l, i, wres;
int res, mode, l, i, wres, tag_id_len;
void *ctx = NULL;
char md5[16], tag_block[2048];
char md5[16], tag_block[2048], *tag_id;
uint32_t size = 0, pos = 0, start;
static char *tag_ids[] = {"",
"libisofs_checksum_tag_v1",
"libisofs_sb_checksum_tag_v1",
"libisofs_tree_checksum_tag_v1",
"libisofs_rlsb32_checksum_tag_v1"};
start = t->checksum_range_start;
memset(tag_block, 0, 2048);
@@ -702,9 +710,10 @@ int iso_md5_write_tag(Ecma119Image *t, int flag)
return ISO_WRONG_ARG_VALUE;
}
if (res > 0) {
iso_util_tag_magic(mode, &tag_id, &tag_id_len, 0);
sprintf(tag_block,
"%s pos=%u range_start=%u range_size=%u",
tag_ids[mode], pos, start, size);
tag_id, pos, start, size);
l = strlen(tag_block);
if (mode == 2) {