Function get_ssh_key_fingerprint

gpg-interface.c:828–869

}

static char *get_ssh_key_fingerprint(const char *signing_key)
{
	struct child_process ssh_keygen = CHILD_PROCESS_INIT;
	int ret = -1;
	struct strbuf fingerprint_stdout = STRBUF_INIT;
	char *fingerprint_ret, *begin, *delim;
	const char *literal_key = NULL;

	/*
	 * With SSH Signing this can contain a filename or a public key
	 * For textual representation we usually want a fingerprint
	 */
	if (is_literal_ssh_key(signing_key, &literal_key)) {
		strvec_pushl(&ssh_keygen.args, "ssh-keygen", "-lf", "-", NULL);
		ret = pipe_command(&ssh_keygen, literal_key,
				   strlen(literal_key), &fingerprint_stdout, 0,
				   NULL, 0);
	} else {
		strvec_pushl(&ssh_keygen.args, "ssh-keygen", "-lf",
			     configured_signing_key, NULL);
		ret = pipe_command(&ssh_keygen, NULL, 0, &fingerprint_stdout, 0,
				   NULL, 0);
	}

	if (!!ret)
		die_errno(_("failed to get the ssh fingerprint for key '%s'"),
			  signing_key);

	begin = fingerprint_stdout.buf;
	delim = strchr(begin, ' ');
	if (!delim)
		die(_("failed to get the ssh fingerprint for key %s"),
			  signing_key);
	begin = delim + 1;
	delim = strchr(begin, ' ');
	if (!delim)
	    die(_("failed to get the ssh fingerprint for key %s"),
			  signing_key);
	fingerprint_ret = xmemdupz(begin, delim - begin);
	strbuf_release(&fingerprint_stdout);
	return fingerprint_ret;
}

/* Returns the first public key from an ssh-agent to use for signing */
static char *get_default_ssh_signing_key(void)