Update CLI -pass option

tools/passwd.c

@@ -0,0 +1,50 @@
+/*
+ *  Copyright 2014-2026 The GmSSL Project. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the License); you may
+ *  not use this file except in compliance with the License.
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+#include <stdio.h>
+#include <gmssl/passwd.h>
+#include "passwd.h"
+
+
+int gmssl_tool_read_password(const char *prog, const char *label,
+	const char *file, char *pass, size_t passlen)
+{
+	char prompt[512];
+	int len;
+
+	if (!prog) prog = "gmssl";
+	if (!label) label = "Password";
+
+	if (file && file[0]) {
+		len = snprintf(prompt, sizeof(prompt), "gmssl %s: %s '%s': ", prog, label, file);
+	} else {
+		len = snprintf(prompt, sizeof(prompt), "gmssl %s: %s: ", prog, label);
+	}
+	if (len < 0 || len >= (int)sizeof(prompt)) {
+		return -1;
+	}
+
+	return gmssl_read_password(prompt, pass, passlen);
+}
+
+int gmssl_tool_get_password(const char *prog, const char *label,
+	const char *file, char **pass, char *passbuf, size_t passlen)
+{
+	if (!pass || !passbuf) {
+		return -1;
+	}
+	if (*pass) {
+		return 1;
+	}
+	if (gmssl_tool_read_password(prog, label, file, passbuf, passlen) != 1) {
+		return -1;
+	}
+	*pass = passbuf;
+	return 1;
+}