Add support for variable-length session keys in our client code.

This means that we now support 'net rpc join' with KRB5 (des based)
logins.  Now, you need to hack 'net' to do that, but the principal is
important...

When we add kerberos to 'net rpc', it should be possible to still do
user management and the like over RPC.

(server-side support to follow shortly)

Andrew Bartlett
(This used to be commit 9ecf9408d98639186b283f1acf0fac46417547d0)

5 files changed, 62 insertions, 22 deletions

diff --git a/source3/libsmb/smbdes.c b/source3/libsmb/smbdes.c
index cde77f94a3..ae946b4a66 100644
--- a/source3/libsmb/smbdes.c
+++ b/source3/libsmb/smbdes.c
@@ -397,6 +397,46 @@ void SamOEMhash( unsigned char *data, const unsigned char *key, int val)
   }
 }
 
+void SamOEMhashBlob( unsigned char *data, int len, DATA_BLOB *key)
+{
+  unsigned char s_box[256];
+  unsigned char index_i = 0;
+  unsigned char index_j = 0;
+  unsigned char j = 0;
+  int ind;
+
+  for (ind = 0; ind < 256; ind++)
+  {
+    s_box[ind] = (unsigned char)ind;
+  }
+
+  for( ind = 0; ind < 256; ind++)
+  {
+     unsigned char tc;
+
+     j += (s_box[ind] + key->data[ind%key->length]);
+
+     tc = s_box[ind];
+     s_box[ind] = s_box[j];
+     s_box[j] = tc;
+  }
+  for( ind = 0; ind < len; ind++)
+  {
+    unsigned char tc;
+    unsigned char t;
+
+    index_i++;
+    index_j += s_box[index_i];
+
+    tc = s_box[index_i];
+    s_box[index_i] = s_box[index_j];
+    s_box[index_j] = tc;
+
+    t = s_box[index_i] + s_box[index_j];
+    data[ind] = data[ind] ^ s_box[t];
+  }
+}
+
 /* Decode a sam password hash into a password.  The password hash is the
    same method used to store passwords in the NT registry.  The DES key
    used is based on the RID of the user. */
diff --git a/source3/rpc_client/cli_samr.c b/source3/rpc_client/cli_samr.c
index 9bab816b81..0eebcd0a6f 100644
--- a/source3/rpc_client/cli_samr.c
+++ b/source3/rpc_client/cli_samr.c
@@ -1341,7 +1341,7 @@ NTSTATUS cli_samr_create_dom_user(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 NTSTATUS cli_samr_set_userinfo(struct cli_state *cli, TALLOC_CTX *mem_ctx, 
                                POLICY_HND *user_pol, uint16 switch_value,
-                               DATA_BLOB sess_key, SAM_USERINFO_CTR *ctr)
+                               DATA_BLOB *sess_key, SAM_USERINFO_CTR *ctr)
 {
 	prs_struct qbuf, rbuf;
 	SAMR_Q_SET_USERINFO q;
@@ -1353,8 +1353,8 @@ NTSTATUS cli_samr_set_userinfo(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 	ZERO_STRUCT(q);
 	ZERO_STRUCT(r);
 
-	if (sess_key.length != 16) {
-		DEBUG(1, ("Cannot handle user session key of length [%u]\n", sess_key.length));
+	if (!sess_key->length) {
+		DEBUG(1, ("No user session key\n"));
 		return NT_STATUS_NO_USER_SESSION_KEY;
 	}
 
@@ -1398,7 +1398,7 @@ NTSTATUS cli_samr_set_userinfo(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 NTSTATUS cli_samr_set_userinfo2(struct cli_state *cli, TALLOC_CTX *mem_ctx, 
                                 POLICY_HND *user_pol, uint16 switch_value,
-                                DATA_BLOB sess_key, SAM_USERINFO_CTR *ctr)
+                                DATA_BLOB *sess_key, SAM_USERINFO_CTR *ctr)
 {
 	prs_struct qbuf, rbuf;
 	SAMR_Q_SET_USERINFO2 q;
@@ -1407,8 +1407,8 @@ NTSTATUS cli_samr_set_userinfo2(struct cli_state *cli, TALLOC_CTX *mem_ctx,
 
 	DEBUG(10,("cli_samr_set_userinfo2\n"));
 
-	if (sess_key.length != 16) {
-		DEBUG(1, ("Cannot handle user session key of length [%u]\n", sess_key.length));
+	if (!sess_key->length) {
+		DEBUG(1, ("No user session key\n"));
 		return NT_STATUS_NO_USER_SESSION_KEY;
 	}
 
diff --git a/source3/rpc_parse/parse_samr.c b/source3/rpc_parse/parse_samr.c
index 1966538362..5e3502b242 100644
--- a/source3/rpc_parse/parse_samr.c
+++ b/source3/rpc_parse/parse_samr.c
@@ -6302,8 +6302,8 @@ NTSTATUS make_samr_userinfo_ctr_usr21(TALLOC_CTX *ctx, SAM_USERINFO_CTR * ctr,
 inits a SAM_USERINFO_CTR structure.
 ********************************************************************/
 
-void init_samr_userinfo_ctr(SAM_USERINFO_CTR * ctr, DATA_BLOB sess_key,
-			    uint16 switch_value, void *info)
+static void init_samr_userinfo_ctr(SAM_USERINFO_CTR * ctr, DATA_BLOB *sess_key,
+				   uint16 switch_value, void *info)
 {
 	DEBUG(5, ("init_samr_userinfo_ctr\n"));
 
@@ -6312,13 +6312,13 @@ void init_samr_userinfo_ctr(SAM_USERINFO_CTR * ctr, DATA_BLOB sess_key,
 
 	switch (switch_value) {
 	case 0x18:
-		SamOEMhash(ctr->info.id24->pass, sess_key.data, 516);
-		dump_data(100, (char *)sess_key.data, 16);
+		SamOEMhashBlob(ctr->info.id24->pass, 516, sess_key);
+		dump_data(100, (char *)sess_key->data, sess_key->length);
 		dump_data(100, (char *)ctr->info.id24->pass, 516);
 		break;
 	case 0x17:
-		SamOEMhash(ctr->info.id23->pass, sess_key.data, 516);
-		dump_data(100, (char *)sess_key.data, 16);
+		SamOEMhashBlob(ctr->info.id23->pass, 516, sess_key);
+		dump_data(100, (char *)sess_key->data, sess_key->length);
 		dump_data(100, (char *)ctr->info.id23->pass, 516);
 		break;
 	default:
@@ -6503,7 +6503,7 @@ inits a SAMR_Q_SET_USERINFO structure.
 ********************************************************************/
 
 void init_samr_q_set_userinfo(SAMR_Q_SET_USERINFO * q_u,
-			      POLICY_HND *hnd, DATA_BLOB sess_key,
+			      POLICY_HND *hnd, DATA_BLOB *sess_key,
 			      uint16 switch_value, void *info)
 {
 	DEBUG(5, ("init_samr_q_set_userinfo\n"));
@@ -6577,7 +6577,7 @@ inits a SAMR_Q_SET_USERINFO2 structure.
 ********************************************************************/
 
 void init_samr_q_set_userinfo2(SAMR_Q_SET_USERINFO2 * q_u,
-			       POLICY_HND *hnd, DATA_BLOB sess_key,
+			       POLICY_HND *hnd, DATA_BLOB *sess_key,
 			       uint16 switch_value, SAM_USERINFO_CTR * ctr)
 {
 	DEBUG(5, ("init_samr_q_set_userinfo2\n"));
@@ -6591,9 +6591,9 @@ void init_samr_q_set_userinfo2(SAMR_Q_SET_USERINFO2 * q_u,
 
 	switch (switch_value) {
 	case 0x12:
-		SamOEMhash(ctr->info.id12->lm_pwd, sess_key.data, 16);
-		SamOEMhash(ctr->info.id12->nt_pwd, sess_key.data, 16);
-		dump_data(100, (char *)sess_key.data, 16);
+		SamOEMhashBlob(ctr->info.id12->lm_pwd, 16, sess_key);
+		SamOEMhashBlob(ctr->info.id12->nt_pwd, 16, sess_key);
+		dump_data(100, (char *)sess_key->data, sess_key->length);
 		dump_data(100, (char *)ctr->info.id12->lm_pwd, 16);
 		dump_data(100, (char *)ctr->info.id12->nt_pwd, 16);
 		break;
diff --git a/source3/utils/net_rpc.c b/source3/utils/net_rpc.c
index 298e8ff669..747fc63e23 100644
--- a/source3/utils/net_rpc.c
+++ b/source3/utils/net_rpc.c
@@ -1727,7 +1727,7 @@ static NTSTATUS rpc_trustdom_add_internals(const DOM_SID *domain_sid, struct cli
 		ctr.info.id24 = &p24;
 
 		result = cli_samr_set_userinfo(cli, mem_ctx, &user_pol, 24,
-					       cli->user_session_key, &ctr);
+					       &cli->user_session_key, &ctr);
 
 		if (!NT_STATUS_IS_OK(result)) {
 			DEBUG(0,("Could not set trust account password: %s\n",
diff --git a/source3/utils/net_rpc_join.c b/source3/utils/net_rpc_join.c
index 22ed49c74f..96943468ad 100644
--- a/source3/utils/net_rpc_join.c
+++ b/source3/utils/net_rpc_join.c
@@ -70,7 +70,7 @@ int net_rpc_join_ok(const char *domain)
 	/* ensure that schannel uses the right domain */
 	fstrcpy(cli->domain, domain);
 	if (! NT_STATUS_IS_OK(result = cli_nt_establish_netlogon(cli, channel, stored_md4_trust_password))) {
-		DEBUG(0,("Error in domain join verfication\n"));
+		DEBUG(0,("Error in domain join verfication (fresh connection)\n"));
 		goto done;
 	}
 	
@@ -282,7 +282,7 @@ int net_rpc_join_newstyle(int argc, const char **argv)
 	ctr.info.id24 = &p24;
 
 	CHECK_RPC_ERR(cli_samr_set_userinfo(cli, mem_ctx, &user_pol, 24, 
-					    cli->user_session_key, &ctr),
+					    &cli->user_session_key, &ctr),
 		      "error setting trust account password");
 
 	/* Why do we have to try to (re-)set the ACB to be the same as what
@@ -304,7 +304,7 @@ int net_rpc_join_newstyle(int argc, const char **argv)
 	   as a normal user with "Add workstation to domain" privilege. */
 
 	result = cli_samr_set_userinfo2(cli, mem_ctx, &user_pol, 0x10, 
-					cli->user_session_key, &ctr);
+					&cli->user_session_key, &ctr);
 
 	/* Now check the whole process from top-to-bottom */
 	cli_samr_close(cli, mem_ctx, &user_pol);
@@ -322,7 +322,7 @@ int net_rpc_join_newstyle(int argc, const char **argv)
 					   md4_trust_password);
 
 	if (!NT_STATUS_IS_OK(result)) {
-		DEBUG(0, ("Error domain join verification: %s\n\n",
+		DEBUG(0, ("Error domain join verification (reused connection): %s\n\n",
 			  nt_errstr(result)));
 
 		if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&