mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 09:54:16 +01:00
1d82bf51fc
The even-S check was based on https://github.com/sipa/bitcoin/commit/a81cd9680 which was replaced by a low-S check in commit e0e14e43d9586409e42919f6cb955540134cda2a Abstract out and fix the check. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
#ifndef LIGHTNING_BITCOIN_SIGNATURE_H
|
|
#define LIGHTNING_BITCOIN_SIGNATURE_H
|
|
#include <ccan/short_types/short_types.h>
|
|
#include <ccan/tal/tal.h>
|
|
|
|
enum sighash_type {
|
|
SIGHASH_ALL = 1,
|
|
SIGHASH_NONE = 2,
|
|
SIGHASH_SINGLE = 3,
|
|
SIGHASH_ANYONECANPAY = 0x80
|
|
};
|
|
|
|
/* ECDSA of double SHA256. */
|
|
struct signature {
|
|
u8 r[32];
|
|
u8 s[32];
|
|
};
|
|
|
|
struct sha256_double;
|
|
struct bitcoin_tx;
|
|
struct pubkey;
|
|
struct privkey;
|
|
struct bitcoin_tx_output;
|
|
struct bitcoin_signature;
|
|
|
|
bool sign_hash(const tal_t *ctx, const struct privkey *p,
|
|
const struct sha256_double *h,
|
|
struct signature *s);
|
|
|
|
/* All tx input scripts must be set to 0 len. */
|
|
bool sign_tx_input(const tal_t *ctx, struct bitcoin_tx *tx,
|
|
unsigned int in,
|
|
const u8 *subscript, size_t subscript_len,
|
|
const struct privkey *privkey, const struct pubkey *pubkey,
|
|
struct signature *sig);
|
|
|
|
/* Does this sig sign the tx with this input for this pubkey. */
|
|
bool check_tx_sig(struct bitcoin_tx *tx, size_t input_num,
|
|
const u8 *redeemscript, size_t redeemscript_len,
|
|
const struct pubkey *key,
|
|
const struct bitcoin_signature *sig);
|
|
|
|
bool check_2of2_sig(struct bitcoin_tx *tx, size_t input_num,
|
|
const u8 *redeemscript, size_t redeemscript_len,
|
|
const struct pubkey *key1, const struct pubkey *key2,
|
|
const struct bitcoin_signature *sig1,
|
|
const struct bitcoin_signature *sig2);
|
|
|
|
/* Signature must have low S value. */
|
|
bool sig_valid(const struct signature *s);
|
|
|
|
/* Give DER encoding of signature: returns length used (<= 72). */
|
|
size_t signature_to_der(u8 der[72], const struct signature *s);
|
|
|
|
#endif /* LIGHTNING_BITCOIN_SIGNATURE_H */
|