s3-libsmb Use a gensec module to provide the ntlmssp client in ntlmssp_wrap.c

This removes the need to have if (ans->gensec_security) everywhere.

Andrew Bartlett

1 files changed, 193 insertions, 82 deletions

diff --git a/source3/libsmb/ntlmssp_wrap.c b/source3/libsmb/ntlmssp_wrap.c
index 5f8e246398..3d1d099a58 100644
--- a/source3/libsmb/ntlmssp_wrap.c
+++ b/source3/libsmb/ntlmssp_wrap.c
@@ -22,6 +22,9 @@
 #include "auth/ntlmssp/ntlmssp.h"
 #include "ntlmssp_wrap.h"
 #include "auth/gensec/gensec.h"
+#include "auth/credentials/credentials.h"
+#include "librpc/rpc/dcerpc.h"
+#include "lib/param/param.h"
 
 NTSTATUS auth_ntlmssp_sign_packet(struct auth_ntlmssp_state *ans,
 				  TALLOC_CTX *sig_mem_ctx,
@@ -31,15 +34,8 @@ NTSTATUS auth_ntlmssp_sign_packet(struct auth_ntlmssp_state *ans,
 				  size_t pdu_length,
 				  DATA_BLOB *sig)
 {
-	if (ans->gensec_security) {
-		return gensec_sign_packet(ans->gensec_security,
-					  sig_mem_ctx, data, length, whole_pdu, pdu_length, sig);
-	}
-	return ntlmssp_sign_packet(ans->ntlmssp_state,
-				   sig_mem_ctx,
-				   data, length,
-				   whole_pdu, pdu_length,
-				   sig);
+	return gensec_sign_packet(ans->gensec_security,
+				  sig_mem_ctx, data, length, whole_pdu, pdu_length, sig);
 }
 
 NTSTATUS auth_ntlmssp_check_packet(struct auth_ntlmssp_state *ans,
@@ -49,14 +45,8 @@ NTSTATUS auth_ntlmssp_check_packet(struct auth_ntlmssp_state *ans,
 				   size_t pdu_length,
 				   const DATA_BLOB *sig)
 {
-	if (ans->gensec_security) {
-		return gensec_check_packet(ans->gensec_security,
-					   data, length, whole_pdu, pdu_length, sig);
-	}
-	return ntlmssp_check_packet(ans->ntlmssp_state,
-				    data, length,
-				    whole_pdu, pdu_length,
-				    sig);
+	return gensec_check_packet(ans->gensec_security,
+				   data, length, whole_pdu, pdu_length, sig);
 }
 
 NTSTATUS auth_ntlmssp_seal_packet(struct auth_ntlmssp_state *ans,
@@ -67,15 +57,8 @@ NTSTATUS auth_ntlmssp_seal_packet(struct auth_ntlmssp_state *ans,
 				  size_t pdu_length,
 				  DATA_BLOB *sig)
 {
-	if (ans->gensec_security) {
-		return gensec_seal_packet(ans->gensec_security,
-					  sig_mem_ctx, data, length, whole_pdu, pdu_length, sig);
-	}
-	return ntlmssp_seal_packet(ans->ntlmssp_state,
-				   sig_mem_ctx,
-				   data, length,
-				   whole_pdu, pdu_length,
-				   sig);
+	return gensec_seal_packet(ans->gensec_security,
+				  sig_mem_ctx, data, length, whole_pdu, pdu_length, sig);
 }
 
 NTSTATUS auth_ntlmssp_unseal_packet(struct auth_ntlmssp_state *ans,
@@ -85,113 +68,225 @@ NTSTATUS auth_ntlmssp_unseal_packet(struct auth_ntlmssp_state *ans,
 				    size_t pdu_length,
 				    const DATA_BLOB *sig)
 {
-	if (ans->gensec_security) {
-		return gensec_unseal_packet(ans->gensec_security,
-					    data, length, whole_pdu, pdu_length, sig);
-	}
-	return ntlmssp_unseal_packet(ans->ntlmssp_state,
-				     data, length,
-				     whole_pdu, pdu_length,
-				     sig);
+	return gensec_unseal_packet(ans->gensec_security,
+				    data, length, whole_pdu, pdu_length, sig);
 }
 
 bool auth_ntlmssp_negotiated_sign(struct auth_ntlmssp_state *ans)
 {
-	if (ans->gensec_security) {
-		return gensec_have_feature(ans->gensec_security, GENSEC_FEATURE_SIGN);
-	}
-	return ans->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN;
+	return gensec_have_feature(ans->gensec_security, GENSEC_FEATURE_SIGN);
 }
 
 bool auth_ntlmssp_negotiated_seal(struct auth_ntlmssp_state *ans)
 {
-	if (ans->gensec_security) {
-		return gensec_have_feature(ans->gensec_security, GENSEC_FEATURE_SEAL);
-	}
-	return ans->ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL;
+	return gensec_have_feature(ans->gensec_security, GENSEC_FEATURE_SEAL);
 }
 
 NTSTATUS auth_ntlmssp_set_username(struct auth_ntlmssp_state *ans,
 				   const char *user)
 {
-	return ntlmssp_set_username(ans->ntlmssp_state, user);
+	cli_credentials_set_username(ans->credentials, user, CRED_SPECIFIED);
+	return NT_STATUS_OK;
 }
 
 NTSTATUS auth_ntlmssp_set_domain(struct auth_ntlmssp_state *ans,
 				 const char *domain)
 {
-	return ntlmssp_set_domain(ans->ntlmssp_state, domain);
+	cli_credentials_set_domain(ans->credentials, domain, CRED_SPECIFIED);
+	return NT_STATUS_OK;
 }
 
 NTSTATUS auth_ntlmssp_set_password(struct auth_ntlmssp_state *ans,
 				   const char *password)
 {
-	return ntlmssp_set_password(ans->ntlmssp_state, password);
+	cli_credentials_set_password(ans->credentials, password, CRED_SPECIFIED);
+	return NT_STATUS_OK;
 }
 
 void auth_ntlmssp_want_feature(struct auth_ntlmssp_state *ans, uint32_t feature)
 {
-	if (ans->gensec_security) {
-		if (feature & NTLMSSP_FEATURE_SESSION_KEY) {
-			gensec_want_feature(ans->gensec_security, GENSEC_FEATURE_SESSION_KEY);
-		}
-		if (feature & NTLMSSP_FEATURE_SIGN) {
-			gensec_want_feature(ans->gensec_security, GENSEC_FEATURE_SIGN);
-		}
-		if (feature & NTLMSSP_FEATURE_SEAL) {
-			gensec_want_feature(ans->gensec_security, GENSEC_FEATURE_SEAL);
-		}
-	} else {
-		ntlmssp_want_feature(ans->ntlmssp_state, feature);
+	if (feature & NTLMSSP_FEATURE_SESSION_KEY) {
+		gensec_want_feature(ans->gensec_security, GENSEC_FEATURE_SESSION_KEY);
+	}
+	if (feature & NTLMSSP_FEATURE_SIGN) {
+		gensec_want_feature(ans->gensec_security, GENSEC_FEATURE_SIGN);
+	}
+	if (feature & NTLMSSP_FEATURE_SEAL) {
+		gensec_want_feature(ans->gensec_security, GENSEC_FEATURE_SEAL);
 	}
 }
 
 DATA_BLOB auth_ntlmssp_get_session_key(struct auth_ntlmssp_state *ans, TALLOC_CTX *mem_ctx)
 {
-	if (ans->gensec_security) {
-		DATA_BLOB session_key;
-		NTSTATUS status = gensec_session_key(ans->gensec_security, mem_ctx, &session_key);
-		if (NT_STATUS_IS_OK(status)) {
-			return session_key;
-		} else {
-			return data_blob_null;
-		}
+	DATA_BLOB session_key;
+	NTSTATUS status = gensec_session_key(ans->gensec_security, mem_ctx, &session_key);
+	if (NT_STATUS_IS_OK(status)) {
+		return session_key;
+	} else {
+		return data_blob_null;
 	}
-	return data_blob_talloc(mem_ctx, ans->ntlmssp_state->session_key.data, ans->ntlmssp_state->session_key.length);
 }
 
 NTSTATUS auth_ntlmssp_update(struct auth_ntlmssp_state *ans,
 			     TALLOC_CTX *mem_ctx,
 			     const DATA_BLOB request, DATA_BLOB *reply)
 {
+	return gensec_update(ans->gensec_security, mem_ctx, NULL, request, reply);
+}
+
+static NTSTATUS gensec_ntlmssp3_client_update(struct gensec_security *gensec_security,
+					      TALLOC_CTX *out_mem_ctx,
+					      struct tevent_context *ev,
+					      const DATA_BLOB request,
+					      DATA_BLOB *reply)
+{
 	NTSTATUS status;
-	if (ans->gensec_security) {
-		return gensec_update(ans->gensec_security, mem_ctx, NULL, request, reply);
-	}
-	status = ntlmssp_update(ans->ntlmssp_state, request, reply);
-	if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
-		return status;
+	struct gensec_ntlmssp_context *gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+
+	status = ntlmssp_update(gensec_ntlmssp->ntlmssp_state, request, reply);
+	if (NT_STATUS_IS_OK(status) ||
+	    NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+		talloc_steal(out_mem_ctx, reply->data);
 	}
-	talloc_steal(mem_ctx, reply->data);
+
 	return status;
 }
 
-NTSTATUS auth_ntlmssp_client_prepare(TALLOC_CTX *mem_ctx,
-				   struct auth_ntlmssp_state **_ans)
+static NTSTATUS gensec_ntlmssp3_client_start(struct gensec_security *gensec_security)
+{
+	NTSTATUS nt_status;
+	struct gensec_ntlmssp_context *gensec_ntlmssp;
+	const char *user, *domain;
+	const char *password;
+
+	nt_status = gensec_ntlmssp_start(gensec_security);
+	NT_STATUS_NOT_OK_RETURN(nt_status);
+
+	gensec_ntlmssp =
+		talloc_get_type_abort(gensec_security->private_data,
+				      struct gensec_ntlmssp_context);
+
+	nt_status = ntlmssp_client_start(gensec_ntlmssp,
+					 lp_netbios_name(), lp_workgroup(),
+					 lp_client_ntlmv2_auth(), &gensec_ntlmssp->ntlmssp_state);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	cli_credentials_get_ntlm_username_domain(gensec_security->credentials, gensec_ntlmssp, &user, &domain);
+	if (!user || !domain) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	nt_status = ntlmssp_set_username(gensec_ntlmssp->ntlmssp_state, user);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	nt_status = ntlmssp_set_domain(gensec_ntlmssp->ntlmssp_state, domain);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	password = cli_credentials_get_password(gensec_security->credentials);
+	if (!password) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	nt_status = ntlmssp_set_password(gensec_ntlmssp->ntlmssp_state, password);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	if (gensec_ntlmssp->gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
+		gensec_ntlmssp->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+	}
+	if (gensec_ntlmssp->gensec_security->want_features & GENSEC_FEATURE_SIGN) {
+		gensec_ntlmssp->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+	}
+	if (gensec_ntlmssp->gensec_security->want_features & GENSEC_FEATURE_SEAL) {
+		gensec_ntlmssp->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
+		gensec_ntlmssp->ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
+	}
+
+	return NT_STATUS_OK;
+}
+
+static const char *gensec_ntlmssp3_client_oids[] = {
+	GENSEC_OID_NTLMSSP,
+	NULL
+};
+
+static const struct gensec_security_ops gensec_ntlmssp3_client_ops = {
+	.name		= "ntlmssp3_client",
+	.sasl_name	= GENSEC_SASL_NAME_NTLMSSP, /* "NTLM" */
+	.auth_type	= DCERPC_AUTH_TYPE_NTLMSSP,
+	.oid            = gensec_ntlmssp3_client_oids,
+	.client_start   = gensec_ntlmssp3_client_start,
+	.magic 	        = gensec_ntlmssp_magic,
+	.update 	= gensec_ntlmssp3_client_update,
+	.sig_size	= gensec_ntlmssp_sig_size,
+	.sign_packet	= gensec_ntlmssp_sign_packet,
+	.check_packet	= gensec_ntlmssp_check_packet,
+	.seal_packet	= gensec_ntlmssp_seal_packet,
+	.unseal_packet	= gensec_ntlmssp_unseal_packet,
+	.wrap           = gensec_ntlmssp_wrap,
+	.unwrap         = gensec_ntlmssp_unwrap,
+	.session_key	= gensec_ntlmssp_session_key,
+	.have_feature   = gensec_ntlmssp_have_feature,
+	.enabled        = true,
+	.priority       = GENSEC_NTLMSSP
+};
+
+NTSTATUS auth_ntlmssp_client_prepare(TALLOC_CTX *mem_ctx, struct auth_ntlmssp_state **auth_ntlmssp_state)
 {
 	struct auth_ntlmssp_state *ans;
-	NTSTATUS status;
+	NTSTATUS nt_status;
+
+	struct gensec_settings *gensec_settings;
+	struct loadparm_context *lp_ctx;
 
 	ans = talloc_zero(mem_ctx, struct auth_ntlmssp_state);
+	if (!ans) {
+		DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
+		return NT_STATUS_NO_MEMORY;
+	}
 
-	status = ntlmssp_client_start(ans,
-				      lp_netbios_name(), lp_workgroup(),
-				      lp_client_ntlmv2_auth(), &ans->ntlmssp_state);
-	if (!NT_STATUS_IS_OK(status)) {
-		return status;
+	lp_ctx = loadparm_init_s3(ans, loadparm_s3_context());
+	if (lp_ctx == NULL) {
+		DEBUG(10, ("loadparm_init_s3 failed\n"));
+		TALLOC_FREE(ans);
+		return NT_STATUS_INVALID_SERVER_STATE;
+	}
+	
+	gensec_settings = lpcfg_gensec_settings(ans, lp_ctx);
+	if (lp_ctx == NULL) {
+		DEBUG(10, ("lpcfg_gensec_settings failed\n"));
+		TALLOC_FREE(ans);
+		return NT_STATUS_NO_MEMORY;
+	}
+	
+	nt_status = gensec_client_start(ans, &ans->gensec_security, gensec_settings);
+	
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		TALLOC_FREE(ans);
+		return nt_status;
 	}
 
-	*_ans = ans;
+	ans->credentials = cli_credentials_init(ans);
+	if (!ans->credentials) {
+		TALLOC_FREE(ans);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	cli_credentials_guess(ans->credentials, lp_ctx);
+
+	talloc_unlink(ans, lp_ctx);
+	talloc_unlink(ans, gensec_settings);
+
+	*auth_ntlmssp_state = ans;
 	return NT_STATUS_OK;
 }
 
@@ -199,5 +294,21 @@ NTSTATUS auth_ntlmssp_client_start(struct auth_ntlmssp_state *ans)
 {
 	NTSTATUS status;
 
+	/* Transfer the credentials to gensec */
+	status = gensec_set_credentials(ans->gensec_security, ans->credentials);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(1, ("Failed to set GENSEC credentials: %s\n", 
+			  nt_errstr(status)));
+		return status;
+	}
+	talloc_unlink(ans, ans->credentials);
+	ans->credentials = NULL;
+
+	status = gensec_start_mech_by_ops(ans->gensec_security,
+					  &gensec_ntlmssp3_client_ops);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
 	return NT_STATUS_OK;
 }