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New API call iso_write_opts_set_scdbackup_tag()

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This commit is contained in:
Thomas Schmitt
2009-08-31 23:09:16 +02:00
parent 9cfa55345e
commit c992687200
6 changed files with 193 additions and 40 deletions
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143
libisofs/md5.c
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@@ -698,6 +698,66 @@ int checksum_writer_create(Ecma119Image *target)
}
static
int iso_md5_write_scdbackup_tag(Ecma119Image *t, char *tag_block, int flag)
{
#ifdef Libisofs_with_checksumS
void *ctx = NULL;
off_t pos = 0, line_start;
int record_len, block_len, res, i;
char postext[20], md5[16], record[160];
line_start = strlen(tag_block);
iso_md5_compute(t->checksum_ctx, tag_block, line_start);
res = iso_md5_clone(t->checksum_ctx, &ctx);
if (res < 0)
goto ex;
res = iso_md5_end(&ctx, md5);
pos = (off_t) t->checksum_tag_pos * (off_t) 2048 + line_start;
if(pos >= 1000000000)
sprintf(postext, "%u%9.9u", (unsigned int) (pos / 1000000000),
(unsigned int) (pos % 1000000000));
else
sprintf(postext, "%u", (unsigned int) pos),
sprintf(record, "%s %s ", t->scdbackup_tag_parm, postext);
record_len = strlen(record);
for (i = 0; i < 16; i++)
sprintf(record + record_len + 2 * i,
"%2.2x", ((unsigned char *) md5)[i]);
record_len+= 32;
res = iso_md5_start(&ctx);
if (res < 0)
goto ex;
iso_md5_compute(ctx, record, record_len);
iso_md5_end(&ctx, md5);
sprintf(tag_block + line_start, "scdbackup_checksum_tag_v0.1 %s %d %s ",
postext, record_len, record);
block_len = strlen(tag_block);
for (i = 0; i < 16; i++)
sprintf(tag_block + block_len + 2 * i,
"%2.2x", ((unsigned char *) md5)[i]);
block_len+= 32;
tag_block[block_len++]= '\n';
res = ISO_SUCCESS;
ex:;
if (ctx != NULL)
iso_md5_end(&ctx, md5);
return res;
#else
return ISO_SUCCESS;
#endif /* Libisofs_with_checksumS */
}
/* Write stream detectable checksum tag to extra block.
* @flag bit0-7= tag type
* 1= session tag (End checksumming.)
@@ -719,11 +779,16 @@ int iso_md5_write_tag(Ecma119Image *t, int flag)
start = t->checksum_range_start;
memset(tag_block, 0, 2048);
mode = flag & 255;
if (mode < 1 || mode > 4)
return ISO_WRONG_ARG_VALUE;
res = iso_md5_clone(t->checksum_ctx, &ctx);
if (res < 0)
return res;
res = iso_md5_end(&ctx, md5);
if (mode == 1) {
res = iso_md5_end(&(t->checksum_ctx), md5);
size = t->checksum_range_size;
pos = t->checksum_tag_pos;
} else if (mode >= 2 && mode <= 4) {
} else {
if (mode == 2) {
pos = t->checksum_sb_tag_pos;
} else if (mode == 3) {
@@ -733,46 +798,51 @@ int iso_md5_write_tag(Ecma119Image *t, int flag)
start = pos - (pos % 32);
}
size = pos - start;
res = iso_md5_clone(t->checksum_ctx, &ctx);
if (res < 0)
return res;
res = iso_md5_end(&ctx, md5);
} else {
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_id, pos, start, size);
if (res < 0)
goto ex;
l = strlen(tag_block);
if (mode == 2) {
sprintf(tag_block + l, " next=%u", t->checksum_tree_tag_pos);
} else if (mode == 3) {
sprintf(tag_block + l, " next=%u", t->checksum_tag_pos);
} else if (mode == 4) {
sprintf(tag_block + l, " session_start=%u", t->ms_block);
}
strcat(tag_block + l, " md5=");
l = strlen(tag_block);
iso_util_tag_magic(mode, &tag_id, &tag_id_len, 0);
sprintf(tag_block, "%s pos=%u range_start=%u range_size=%u",
tag_id, pos, start, size);
l = strlen(tag_block);
if (mode == 2) {
sprintf(tag_block + l, " next=%u", t->checksum_tree_tag_pos);
} else if (mode == 3) {
sprintf(tag_block + l, " next=%u", t->checksum_tag_pos);
} else if (mode == 4) {
sprintf(tag_block + l, " session_start=%u", t->ms_block);
}
strcat(tag_block + l, " md5=");
l = strlen(tag_block);
for (i = 0; i < 16; i++)
sprintf(tag_block + l + 2 * i, "%2.2x",
((unsigned char *) md5)[i]);
l+= 32;
res = iso_md5_start(&ctx);
if (res > 0) {
iso_md5_compute(ctx, tag_block, l);
iso_md5_end(&ctx, md5);
strcpy(tag_block + l, " self=");
l += 6;
for (i = 0; i < 16; i++)
sprintf(tag_block + l + 2 * i, "%2.2x",
((unsigned char *) md5)[i]);
l+= 32;
res = iso_md5_start(&ctx);
if (res > 0) {
iso_md5_compute(ctx, tag_block, l);
iso_md5_end(&ctx, md5);
strcpy(tag_block + l, " self=");
l += 6;
for (i = 0; i < 16; i++)
sprintf(tag_block + l + 2 * i, "%2.2x",
((unsigned char *) md5)[i]);
}
tag_block[l + 32] = '\n';
}
tag_block[l + 32] = '\n';
if (mode == 1 && t->scdbackup_tag_parm[0]) {
if (t->ms_block > 0) {
iso_msg_submit(t->image->id, ISO_SCDBACKUP_TAG_NOT_0, 0, NULL);
} else {
res = iso_md5_write_scdbackup_tag(t, tag_block, 0);
if (res < 0)
goto ex;
}
}
if (mode == 4) {
if (t->opts_overwrite != NULL)
memcpy(t->opts_overwrite + pos * 2048, tag_block, 2048);
@@ -783,6 +853,7 @@ int iso_md5_write_tag(Ecma119Image *t, int flag)
goto ex;
}
}
res = ISO_SUCCESS;
ex:;
if (ctx != NULL)