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