bool bp_txout_match(const struct bp_txout *txout,
const struct bp_keyset *ks)
{
if (!txout || !txout->scriptPubKey || !ks)
return false;
bool rc = false;
struct bscript_addr addrs;
if (!bsp_addr_parse(&addrs, txout->scriptPubKey->str,
txout->scriptPubKey->len))
return false;
struct const_buffer *buf;
clist *tmp = addrs.pub;
while (tmp) {
buf = tmp->data;
tmp = tmp->next;
if (bpks_lookup(ks, buf->p, buf->len, false)) {
rc = true;
goto out;
}
}
tmp = addrs.pubhash;
while (tmp) {
buf = tmp->data;
tmp = tmp->next;
if (bpks_lookup(ks, buf->p, buf->len, true)) {
rc = true;
goto out;
}
}
out:
clist_free_ext(addrs.pub, buffer_free);
clist_free_ext(addrs.pubhash, buffer_free);
return rc;
}
bool bp_script_sign(struct bp_keystore *ks, const cstring *fromPubKey,
const struct bp_tx *txTo, unsigned int nIn,
int nHashType)
{
if (!txTo || !txTo->vin || nIn >= txTo->vin->len)
return false;
struct bp_txin *txin = parr_idx(txTo->vin, nIn);
/* get signature hash */
bu256_t hash;
bp_tx_sighash(&hash, fromPubKey, txTo, nIn, nHashType);
/* match fromPubKey against templates, to find what pubkey[hashes]
* are required for signing
*/
struct bscript_addr addrs;
if (!bsp_addr_parse(&addrs, fromPubKey->str, fromPubKey->len))
return false;
cstring *scriptSig = cstr_new_sz(64);
bool rc = false;
bu160_t key_id;
struct buffer *kbuf;
/* sign, based on script template matched above */
switch (addrs.txtype) {
case TX_PUBKEY:
kbuf = addrs.pub->data;
bu_Hash160((unsigned char *)&key_id, kbuf->p, kbuf->len);
if (!sign1(&key_id, ks, &hash, nHashType, scriptSig))
goto out;
break;
case TX_PUBKEYHASH:
kbuf = addrs.pubhash->data;
memcpy(&key_id, kbuf->p, kbuf->len);
if (!sign1(&key_id, ks, &hash, nHashType, scriptSig))
goto out;
if (!bkeys_pubkey_append(ks, &key_id, scriptSig))
goto out;
break;
case TX_SCRIPTHASH: /* TODO; not supported yet */
case TX_MULTISIG:
goto out;
case TX_NONSTANDARD: /* unknown script type, cannot sign */
goto out;
}
if (txin->scriptSig)
cstr_free(txin->scriptSig, true);
txin->scriptSig = scriptSig;
scriptSig = NULL;
rc = true;
out:
if (scriptSig)
cstr_free(scriptSig, true);
bsp_addr_free(&addrs);
return rc;
}
