/* Only does SIGHASH_ALL */
void sign_tx_input(secp256k1_context *secpctx,
struct bitcoin_tx *tx,
unsigned int in,
const u8 *subscript, size_t subscript_len,
const struct privkey *privkey, const struct pubkey *key,
struct signature *sig)
{
struct sha256_double hash;
sha256_tx_one_input(tx, in, subscript, subscript_len, &hash);
dump_tx("Signing", tx, in, subscript, subscript_len, key, &hash);
sign_hash(secpctx, privkey, &hash, sig);
}
void queue_pkt_open_commit_sig(struct peer *peer)
{
OpenCommitSig *s = tal(peer, OpenCommitSig);
open_commit_sig__init(s);
dump_tx("Creating sig for:", peer->them.commit->tx);
dump_key("Using key:", &peer->us.commitkey);
peer->them.commit->sig = tal(peer->them.commit,
struct bitcoin_signature);
peer->them.commit->sig->stype = SIGHASH_ALL;
peer_sign_theircommit(peer, peer->them.commit->tx,
&peer->them.commit->sig->sig);
s->sig = signature_to_proto(s, &peer->them.commit->sig->sig);
queue_pkt(peer, PKT__PKT_OPEN_COMMIT_SIG, s);
}
bool check_tx_sig(secp256k1_context *secpctx,
struct bitcoin_tx *tx, size_t input_num,
const u8 *redeemscript, size_t redeemscript_len,
const struct pubkey *key,
const struct bitcoin_signature *sig)
{
struct sha256_double hash;
bool ret;
assert(input_num < tx->input_count);
sha256_tx_one_input(tx, input_num, redeemscript, redeemscript_len,
&hash);
/* We only use SIGHASH_ALL for the moment. */
if (sig->stype != SIGHASH_ALL)
return false;
ret = check_signed_hash(secpctx, &hash, &sig->sig, key);
if (!ret)
dump_tx("Sig failed", tx, input_num,
redeemscript, redeemscript_len, key, &hash);
return ret;
}
