static rs_result rs_loadsig_s_magic(rs_job_t *job)
{
int l;
rs_result result;
if ((result = rs_suck_n4(job, &l)) != RS_DONE) {
return result;
} else if (l != RS_SIG_MAGIC) {
rs_error("wrong magic number %#10x for signature", l);
return RS_BAD_MAGIC;
} else {
rs_trace("got signature magic %#10x", l);
}
job->statefn = rs_loadsig_s_blocklen;
return RS_RUNNING;
}
static rs_result rs_loadsig_s_weak(rs_job_t *job)
{
int l;
rs_result result;
result = rs_suck_n4(job, &l);
if (result == RS_DONE)
;
else if (result == RS_INPUT_ENDED) /* ending here is OK */
return RS_DONE;
else
return result;
job->weak_sig = l;
job->statefn = rs_loadsig_s_strong;
return RS_RUNNING;
}
static rs_result rs_loadsig_s_blocklen(rs_job_t *job)
{
int l;
rs_result result;
if ((result = rs_suck_n4(job, &l)) != RS_DONE)
return result;
job->block_len = l;
if (job->block_len < 1) {
rs_error("block length of %d is bogus", (int) job->block_len);
return RS_CORRUPT;
}
job->statefn = rs_loadsig_s_stronglen;
job->stats.block_len = job->block_len;
return RS_RUNNING;
}
/**
* Called while we're trying to read the header of the patch.
*/
static rs_result rs_patch_s_header(rs_job_t *job)
{
int v;
rs_result result;
if ((result = rs_suck_n4(job, &v)) != RS_DONE)
return result;
if (v != RS_DELTA_MAGIC) {
rs_log(RS_LOG_ERR,
"got magic number %#x rather than expected value %#x",
v, RS_DELTA_MAGIC);
return RS_BAD_MAGIC;
} else
rs_trace("got patch magic %#x", v);
job->statefn = rs_patch_s_cmdbyte;
return RS_RUNNING;
}
static rs_result rs_loadsig_s_magic(rs_job_t *job)
{
int l;
rs_result result;
if ((result = rs_suck_n4(job, &l)) != RS_DONE) {
return result;
}
switch(l) {
case RS_MD4_SIG_MAGIC:
case RS_BLAKE2_SIG_MAGIC:
job->magic = job->signature->magic = l;
rs_trace("got signature magic %#10x", l);
break;
default:
rs_error("wrong magic number %#10x for signature", l);
return RS_BAD_MAGIC;
}
job->statefn = rs_loadsig_s_blocklen;
return RS_RUNNING;
}
static rs_result rs_loadsig_s_stronglen(rs_job_t *job)
{
int l;
rs_result result;
if ((result = rs_suck_n4(job, &l)) != RS_DONE)
return result;
job->strong_sum_len = l;
if (l < 0 || l > RS_MAX_STRONG_SUM_LENGTH) {
rs_error("strong sum length %d is implausible", l);
return RS_CORRUPT;
}
job->signature->block_len = job->block_len;
job->signature->strong_sum_len = job->strong_sum_len;
rs_trace("allocated sigset_t (strong_sum_len=%d, block_len=%d)",
(int) job->strong_sum_len, (int) job->block_len);
job->statefn = rs_loadsig_s_weak;
return RS_RUNNING;
}
