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57 lines
1.4 KiB
57 lines
1.4 KiB
#include <ccan/crypto/shachain/shachain.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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#include <ccan/opt/opt.h>
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#include <ccan/str/hex/hex.h>
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#include <ccan/err/err.h>
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#include <ccan/read_write_all/read_write_all.h>
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#include "lightning.pb-c.h"
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#include "protobuf_convert.h"
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#include "pkt.h"
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#include <unistd.h>
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int main(int argc, char *argv[])
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{
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const tal_t *ctx = tal_arr(NULL, char, 0);
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struct sha256 secret;
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Pkt *pkt;
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Sha256Hash *preimage;
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char hexstr[hex_str_size(sizeof(secret))];
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err_set_progname(argv[0]);
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opt_register_noarg("--help|-h", opt_usage_and_exit,
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"<update-sig-or-update-complete>\n"
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"Extract revocation preimage from message",
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"Print this message.");
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opt_parse(&argc, argv, opt_log_stderr_exit);
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if (argc != 2)
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opt_usage_exit_fail("Expected 1 argument");
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pkt = any_pkt_from_file(argv[1]);
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switch (pkt->pkt_case) {
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case PKT__PKT_UPDATE_SIGNATURE:
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preimage = pkt->update_signature->revocation_preimage;
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break;
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case PKT__PKT_UPDATE_COMPLETE:
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preimage = pkt->update_complete->revocation_preimage;
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break;
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default:
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errx(1, "Unexpected packet type %u in %s",
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pkt->pkt_case, argv[1]);
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}
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proto_to_sha256(preimage, &secret);
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if (!hex_encode(&secret, sizeof(secret), hexstr, sizeof(hexstr)))
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abort();
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if (!write_all(STDOUT_FILENO, hexstr, strlen(hexstr)))
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err(1, "Writing out hexstr");
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tal_free(ctx);
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return 0;
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}
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