mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 09:54:16 +01:00
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
#include <ccan/opt/opt.h>
|
|
#include <ccan/read_write_all/read_write_all.h>
|
|
#include <ccan/short_types/short_types.h>
|
|
#include <ccan/str/hex/hex.h>
|
|
#include <common/sphinx.h>
|
|
#include <common/utils.h>
|
|
#include <err.h>
|
|
#include <secp256k1.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
static void do_generate(int argc, char **argv)
|
|
{
|
|
const tal_t *ctx = talz(NULL, tal_t);
|
|
int num_hops = argc - 1;
|
|
struct pubkey *path = tal_arr(ctx, struct pubkey, num_hops);
|
|
u8 privkeys[argc - 1][32];
|
|
u8 sessionkey[32];
|
|
struct hop_data hops_data[num_hops];
|
|
struct secret *shared_secrets;
|
|
u8 assocdata[32];
|
|
|
|
memset(&sessionkey, 'A', sizeof(sessionkey));
|
|
memset(&assocdata, 'B', sizeof(assocdata));
|
|
|
|
for (int i = 0; i < num_hops; i++) {
|
|
if (!hex_decode(argv[1 + i], 66, privkeys[i], 33)) {
|
|
errx(1, "Invalid private key hex '%s'", argv[1 + i]);
|
|
}
|
|
if (secp256k1_ec_pubkey_create(secp256k1_ctx, &path[i].pubkey,
|
|
privkeys[i]) != 1)
|
|
errx(1, "Could not decode pubkey");
|
|
fprintf(stderr, "Node %d pubkey %s\n", i, secp256k1_pubkey_to_hexstr(ctx, &path[i].pubkey));
|
|
}
|
|
|
|
for (int i = 0; i < num_hops; i++) {
|
|
memset(&hops_data[i], 0, sizeof(hops_data[i]));
|
|
hops_data[i].realm = i;
|
|
memset(&hops_data[i].channel_id, i,
|
|
sizeof(hops_data[i].channel_id));
|
|
hops_data[i].amt_forward = i;
|
|
hops_data[i].outgoing_cltv = i;
|
|
fprintf(stderr, "Hopdata %d: %s\n", i, tal_hexstr(NULL, &hops_data[i], sizeof(hops_data[i])));
|
|
}
|
|
|
|
struct onionpacket *res =
|
|
create_onionpacket(ctx, path, hops_data, sessionkey, assocdata,
|
|
sizeof(assocdata), &shared_secrets);
|
|
|
|
u8 *serialized = serialize_onionpacket(ctx, res);
|
|
if (!serialized)
|
|
errx(1, "Error serializing message.");
|
|
else
|
|
printf("%s\n", tal_hex(ctx, serialized));
|
|
tal_free(ctx);
|
|
}
|
|
|
|
static void do_decode(int argc, char **argv)
|
|
{
|
|
struct route_step *step;
|
|
struct onionpacket *msg;
|
|
struct privkey seckey;
|
|
const tal_t *ctx = talz(NULL, tal_t);
|
|
u8 serialized[TOTAL_PACKET_SIZE];
|
|
char hextemp[2 * sizeof(serialized) + 1];
|
|
memset(hextemp, 0, sizeof(hextemp));
|
|
u8 shared_secret[32];
|
|
u8 assocdata[32];
|
|
|
|
memset(&assocdata, 'B', sizeof(assocdata));
|
|
|
|
if (argc != 2)
|
|
opt_usage_exit_fail("Expect a privkey with --decode");
|
|
|
|
if (!hex_decode(argv[1], strlen(argv[1]), &seckey, sizeof(seckey)))
|
|
errx(1, "Invalid private key hex '%s'", argv[1]);
|
|
|
|
if (!read_all(STDIN_FILENO, hextemp, sizeof(hextemp)))
|
|
errx(1, "Reading in onion");
|
|
|
|
if (!hex_decode(hextemp, sizeof(hextemp), serialized, sizeof(serialized))) {
|
|
errx(1, "Invalid onion hex '%s'", hextemp);
|
|
}
|
|
|
|
msg = parse_onionpacket(ctx, serialized, sizeof(serialized));
|
|
|
|
if (!msg)
|
|
errx(1, "Error parsing message.");
|
|
|
|
if (!onion_shared_secret(shared_secret, msg, &seckey))
|
|
errx(1, "Error creating shared secret.");
|
|
|
|
step = process_onionpacket(ctx, msg, shared_secret, assocdata,
|
|
sizeof(assocdata));
|
|
|
|
if (!step || !step->next)
|
|
errx(1, "Error processing message.");
|
|
|
|
u8 *ser = serialize_onionpacket(ctx, step->next);
|
|
if (!ser)
|
|
errx(1, "Error serializing message.");
|
|
|
|
printf("%s\n", tal_hex(ctx, ser));
|
|
tal_free(ctx);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
setup_locale();
|
|
|
|
bool generate = false, decode = false;
|
|
secp256k1_ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY |
|
|
SECP256K1_CONTEXT_SIGN);
|
|
|
|
opt_register_noarg("--help|-h", opt_usage_and_exit,
|
|
"--generate <pubkey1> <pubkey2>... OR\n"
|
|
"--decode <privkey>\n"
|
|
"Either create an onion message, or decode one step",
|
|
"Print this message.");
|
|
opt_register_noarg("--generate", opt_set_bool, &generate,
|
|
"Generate onion through the given hex pubkeys");
|
|
opt_register_noarg("--decode", opt_set_bool, &decode,
|
|
"Decode onion from stdin given the private key");
|
|
|
|
opt_parse(&argc, argv, opt_log_stderr_exit);
|
|
|
|
if (generate)
|
|
do_generate(argc, argv);
|
|
else if (decode)
|
|
do_decode(argc, argv);
|
|
return 0;
|
|
}
|