net: add "-k" switch for kerberos authentication (in preparation for #5416).

Guenther
(This used to be commit 4cce94d464b16d29b638da3a581d98a237959b63)

4 files changed, 17 insertions, 4 deletions

diff --git a/source3/utils/net.c b/source3/utils/net.c
index d086f947f1..e90e8f0a0f 100644
--- a/source3/utils/net.c
+++ b/source3/utils/net.c
@@ -636,6 +636,7 @@ static struct functable net_func[] = {
 		{"stdin",	'i', POPT_ARG_NONE,   &c->opt_stdin},
 		{"timeout",	't', POPT_ARG_INT,    &c->opt_timeout},
 		{"machine-pass",'P', POPT_ARG_NONE,   &c->opt_machine_pass},
+		{"kerberos",    'k', POPT_ARG_NONE,   &c->opt_kerberos},
 		{"myworkgroup", 'W', POPT_ARG_STRING, &c->opt_workgroup},
 		{"verbose",	'v', POPT_ARG_NONE,   &c->opt_verbose},
 		{"test",	'T', POPT_ARG_NONE,   &c->opt_testmode},
diff --git a/source3/utils/net.h b/source3/utils/net.h
index 01a76a0db1..4f59ff995c 100644
--- a/source3/utils/net.h
+++ b/source3/utils/net.h
@@ -56,6 +56,7 @@ struct net_context {
 	const char *opt_exclude;
 	const char *opt_destination;
 	int opt_testmode;
+	bool opt_kerberos;
 
 	int opt_have_ip;
 	struct sockaddr_storage opt_dest_ip;
diff --git a/source3/utils/net_help_common.c b/source3/utils/net_help_common.c
index be06caa37e..edf083905a 100644
--- a/source3/utils/net_help_common.c
+++ b/source3/utils/net_help_common.c
@@ -48,7 +48,8 @@ int net_common_flags_usage(struct net_context *c, int argc, const char **argv)
 	d_printf("\t-l or --long\t\t\tDisplay full information\n");
 	d_printf("\t-V or --version\t\t\tPrint samba version information\n");
 	d_printf("\t-P or --machine-pass\t\tAuthenticate as machine account\n");
-	d_printf("\t-e or --encrypt\t\tEncrypt SMB transport (UNIX extended servers only)\n");
+	d_printf("\t-e or --encrypt\t\t\tEncrypt SMB transport (UNIX extended servers only)\n");
+	d_printf("\t-k or --kerberos\t\tUse kerberos (active directory) authentication\n");
 	return -1;
 }
 
diff --git a/source3/utils/net_util.c b/source3/utils/net_util.c
index be00dde16e..eb39c739e7 100644
--- a/source3/utils/net_util.c
+++ b/source3/utils/net_util.c
@@ -94,17 +94,23 @@ NTSTATUS connect_to_service(struct net_context *c,
 					const char *service_type)
 {
 	NTSTATUS nt_status;
+	int flags = 0;
 
 	c->opt_password = net_prompt_pass(c, c->opt_user_name);
-	if (!c->opt_password) {
-		return NT_STATUS_NO_MEMORY;
+
+	if (c->opt_kerberos) {
+		flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
+	}
+
+	if (c->opt_kerberos && c->opt_password) {
+		flags |= CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS;
 	}
 
 	nt_status = cli_full_connection(cli_ctx, NULL, server_name,
 					server_ss, c->opt_port,
 					service_name, service_type,
 					c->opt_user_name, c->opt_workgroup,
-					c->opt_password, 0, Undefined, NULL);
+					c->opt_password, flags, Undefined, NULL);
 	if (!NT_STATUS_IS_OK(nt_status)) {
 		d_fprintf(stderr, "Could not connect to server %s\n", server_name);
 
@@ -538,6 +544,10 @@ const char *net_prompt_pass(struct net_context *c, const char *user)
 		return NULL;
 	}
 
+	if (c->opt_kerberos && !c->opt_user_specified) {
+		return NULL;
+	}
+
 	asprintf(&prompt, "Enter %s's password:", user);
 	if (!prompt) {
 		return NULL;