int WPACKET_init_len(WPACKET *pkt, BUF_MEM *buf, size_t lenbytes)
{
unsigned char *lenchars;
/* Internal API, so should not fail */
assert(buf != NULL);
if (buf == NULL)
return 0;
pkt->buf = buf;
pkt->curr = 0;
pkt->written = 0;
pkt->maxsize = maxmaxsize(lenbytes);
pkt->subs = OPENSSL_zalloc(sizeof(*pkt->subs));
if (pkt->subs == NULL)
return 0;
if (lenbytes == 0)
return 1;
pkt->subs->pwritten = lenbytes;
pkt->subs->lenbytes = lenbytes;
if (!WPACKET_allocate_bytes(pkt, lenbytes, &lenchars)) {
OPENSSL_free(pkt->subs);
pkt->subs = NULL;
return 0;
}
pkt->subs->packet_len = lenchars - (unsigned char *)pkt->buf->data;
return 1;
}
int WPACKET_set_max_size(WPACKET *pkt, size_t maxsize)
{
WPACKET_SUB *sub;
size_t lenbytes;
/* Internal API, so should not fail */
assert(pkt->subs != NULL);
if (pkt->subs == NULL)
return 0;
/* Find the WPACKET_SUB for the top level */
for (sub = pkt->subs; sub->parent != NULL; sub = sub->parent)
continue;
lenbytes = sub->lenbytes;
if (lenbytes == 0)
lenbytes = sizeof(pkt->maxsize);
if (maxmaxsize(lenbytes) < maxsize || maxsize < pkt->written)
return 0;
pkt->maxsize = maxsize;
return 1;
}
int WPACKET_init_len(WPACKET *pkt, BUF_MEM *buf, size_t lenbytes)
{
/* Internal API, so should not fail */
if (!ossl_assert(buf != NULL))
return 0;
pkt->staticbuf = NULL;
pkt->buf = buf;
pkt->maxsize = maxmaxsize(lenbytes);
return wpacket_intern_init_len(pkt, lenbytes);
}
int WPACKET_init_static_len(WPACKET *pkt, unsigned char *buf, size_t len,
size_t lenbytes)
{
size_t max = maxmaxsize(lenbytes);
/* Internal API, so should not fail */
if (!ossl_assert(buf != NULL && len > 0))
return 0;
pkt->staticbuf = buf;
pkt->buf = NULL;
pkt->maxsize = (max < len) ? max : len;
return wpacket_intern_init_len(pkt, lenbytes);
}
