61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
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#include <common/json_helpers.h>
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#include <common/jsonrpc_errors.h>
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#include <common/param.h>
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#include <common/type_to_string.h>
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#include <common/utils.h>
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#include <errno.h>
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#include <gossipd/gen_gossip_wire.h>
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#include <hsmd/gen_hsm_wire.h>
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#include <string.h>
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#include <wire/wire_sync.h>
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static struct command_result *json_signmessage(struct command *cmd,
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const char *buffer,
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const jsmntok_t *obj UNNEEDED,
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const jsmntok_t *params)
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{
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const char *message;
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secp256k1_ecdsa_recoverable_signature rsig;
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struct json_stream *response;
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u8 sig[64], recidu8, *msg;
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int recid;
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if (!param(cmd, buffer, params,
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p_req("message", param_string, &message),
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NULL))
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return command_param_failed();
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if (strlen(message) > 65535)
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return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
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"Message must be < 64k");
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msg = towire_hsm_sign_message(NULL,
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tal_dup_arr(tmpctx, u8, (u8 *)message,
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strlen(message), 0));
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if (!wire_sync_write(cmd->ld->hsm_fd, take(msg)))
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fatal("Could not write to HSM: %s", strerror(errno));
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msg = wire_sync_read(tmpctx, cmd->ld->hsm_fd);
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if (!fromwire_hsm_sign_message_reply(msg, &rsig))
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fatal("HSM gave bad hsm_sign_message_reply %s",
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tal_hex(msg, msg));
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secp256k1_ecdsa_recoverable_signature_serialize_compact(secp256k1_ctx,
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sig, &recid,
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&rsig);
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response = json_stream_success(cmd);
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json_add_hex(response, "signature", sig, sizeof(sig));
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recidu8 = recid;
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json_add_hex(response, "recid", &recidu8, sizeof(recidu8));
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return command_success(cmd, response);
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}
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static const struct json_command json_signmessage_cmd = {
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"signmessage",
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"utility",
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json_signmessage,
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"Create a digital signature of {message}",
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};
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AUTODATA(json_command, &json_signmessage_cmd);
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