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common/shutdown_scriptpubkey: extract shutdown scriptpubkey test.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2021-02-19 14:52:01 +10:30
parent ebb1b19c65
commit 66dda32da2
5 changed files with 35 additions and 15 deletions
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1
common/Makefile
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@ -71,6 +71,7 @@ COMMON_SRC_NOGEN := \
common/read_peer_msg.c \
common/route.c \
common/setup.c \
common/shutdown_scriptpubkey.c \
common/socket_close.c \
common/sphinx.c \
common/status.c \

10
common/shutdown_scriptpubkey.c Normal file
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@ -0,0 +1,10 @@
#include <bitcoin/script.h>
#include <common/shutdown_scriptpubkey.h>
bool valid_shutdown_scriptpubkey(const u8 *scriptpubkey)
{
return is_p2pkh(scriptpubkey, NULL)
|| is_p2sh(scriptpubkey, NULL)
|| is_p2wpkh(scriptpubkey, NULL)
|| is_p2wsh(scriptpubkey, NULL);
}

21
common/shutdown_scriptpubkey.h Normal file
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@ -0,0 +1,21 @@
#ifndef LIGHTNING_COMMON_SHUTDOWN_SCRIPTPUBKEY_H
#define LIGHTNING_COMMON_SHUTDOWN_SCRIPTPUBKEY_H
#include "config.h"
#include <ccan/short_types/short_types.h>
/* BOLT #2:
*
* 1. `OP_DUP` `OP_HASH160` `20` 20-bytes `OP_EQUALVERIFY` `OP_CHECKSIG`
* (pay to pubkey hash), OR
* 2. `OP_HASH160` `20` 20-bytes `OP_EQUAL` (pay to script hash), OR
* 3. `OP_0` `20` 20-bytes (version 0 pay to witness pubkey), OR
* 4. `OP_0` `32` 32-bytes (version 0 pay to witness script hash)
*
* A receiving node:
*...
* - if the `scriptpubkey` is not in one of the above forms:
* - SHOULD fail the connection.
*/
bool valid_shutdown_scriptpubkey(const u8 *scriptpubkey);
#endif /* LIGHTNING_COMMON_SHUTDOWN_SCRIPTPUBKEY_H */

1
lightningd/Makefile
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@ -120,6 +120,7 @@ LIGHTNINGD_COMMON_OBJS := \
common/pseudorand.o \
common/random_select.o \
common/setup.o \
common/shutdown_scriptpubkey.o \
common/sphinx.o \
common/status_wire.o \
common/timeout.o \

17
lightningd/channel_control.c
View File

@ -12,6 +12,7 @@
#include <common/memleak.h>
#include <common/per_peer_state.h>
#include <common/psbt_open.h>
#include <common/shutdown_scriptpubkey.h>
#include <common/timeout.h>
#include <common/tx_roles.h>
#include <common/utils.h>
@ -237,21 +238,7 @@ static void peer_got_shutdown(struct channel *channel, const u8 *msg)
tal_free(channel->shutdown_scriptpubkey[REMOTE]);
channel->shutdown_scriptpubkey[REMOTE] = scriptpubkey;
/* BOLT #2:
*
* 1. `OP_DUP` `OP_HASH160` `20` 20-bytes `OP_EQUALVERIFY` `OP_CHECKSIG`
* (pay to pubkey hash), OR
* 2. `OP_HASH160` `20` 20-bytes `OP_EQUAL` (pay to script hash), OR
* 3. `OP_0` `20` 20-bytes (version 0 pay to witness pubkey), OR
* 4. `OP_0` `32` 32-bytes (version 0 pay to witness script hash)
*
* A receiving node:
*...
* - if the `scriptpubkey` is not in one of the above forms:
* - SHOULD fail the connection.
*/
if (!is_p2pkh(scriptpubkey, NULL) && !is_p2sh(scriptpubkey, NULL)
&& !is_p2wpkh(scriptpubkey, NULL) && !is_p2wsh(scriptpubkey, NULL)) {
if (!valid_shutdown_scriptpubkey(scriptpubkey)) {
channel_fail_permanent(channel,
REASON_PROTOCOL,
"Bad shutdown scriptpubkey %s",