Function decrypt_scb

plugins/chanbackup.c:168–217

Returns decrypted SCB in form of a u8 array */

/* Returns decrypted SCB in form of a u8 array */
static u8 *decrypt_scb(struct plugin *p)
{
	struct stat st;
	int fd = open("emergency.recover", O_RDONLY);

	if (stat("emergency.recover", &st) != 0)
		plugin_err(p, "SCB file is corrupted!: %s",
                          strerror(errno));

	u8 final[st.st_size];

	if (!read_all(fd, &final, st.st_size)) {
		plugin_log(p, LOG_DBG, "SCB file is corrupted!: %s",
                           strerror(errno));
		return NULL;
	}

	crypto_secretstream_xchacha20poly1305_state crypto_state;

	if (st.st_size < ABYTES +
			 HEADER_LEN)
		plugin_err(p, "SCB file is corrupted!");

	u8 *ans = tal_arr(tmpctx, u8, st.st_size -
                          ABYTES -
                          HEADER_LEN);

	/* The header part */
	if (crypto_secretstream_xchacha20poly1305_init_pull(&crypto_state,
							    final,
							    (&secret)->data) != 0)
	{
		plugin_err(p, "SCB file is corrupted!");
	}

	if (crypto_secretstream_xchacha20poly1305_pull(&crypto_state, ans,
						       NULL, 0,
						       final +
						       HEADER_LEN,
						       st.st_size -
						       HEADER_LEN,
						       NULL, 0) != 0) {
		plugin_err(p, "SCB file is corrupted!");
	}

	if (close(fd) != 0)
		plugin_err(p, "Closing: %s", strerror(errno));

	return ans;
}

static struct command_result *after_recover_rpc(struct command *cmd,
					        const char *buf,