auth/spnego: make use of data_blob_null instead of using data_blob(NULL, 0)

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

diff --git a/auth/gensec/spnego.c b/auth/gensec/spnego.c
index 9495933278064b4f3762d2026007764b04db9967..76993550bf0890ce2ec39f946e835f0c97334d8d 100644 (file)
--- a/auth/gensec/spnego.c
+++ b/auth/gensec/spnego.c
@@ -91,7 +91,7 @@ static NTSTATUS gensec_spnego_client_start(struct gensec_security *gensec_securi
        spnego_state->state_position = SPNEGO_CLIENT_START;
        spnego_state->sub_sec_security = NULL;
        spnego_state->no_response_expected = false;
-       spnego_state->mech_types = data_blob(NULL, 0);
+       spnego_state->mech_types = data_blob_null;
        spnego_state->out_max_length = gensec_max_update_size(gensec_security);
        spnego_state->out_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
 
@@ -115,7 +115,7 @@ static NTSTATUS gensec_spnego_server_start(struct gensec_security *gensec_securi
        spnego_state->state_position = SPNEGO_SERVER_START;
        spnego_state->sub_sec_security = NULL;
        spnego_state->no_response_expected = false;
-       spnego_state->mech_types = data_blob(NULL, 0);
+       spnego_state->mech_types = data_blob_null;
        spnego_state->out_max_length = gensec_max_update_size(gensec_security);
        spnego_state->out_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
 
@@ -212,7 +212,6 @@ static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_
 {
        int i;
        NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
-       DATA_BLOB null_data_blob = data_blob(NULL,0);
        bool ok;
 
        const struct gensec_security_ops_wrapper *all_sec
@@ -323,7 +322,7 @@ static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_
                        nt_status = gensec_update_ev(spnego_state->sub_sec_security,
                                                  out_mem_ctx, 
                                                  ev,
-                                                 null_data_blob, 
+                                                 data_blob_null,
                                                  unwrapped_out);
 
                        /* it is likely that a NULL input token will
@@ -383,7 +382,7 @@ static NTSTATUS gensec_spnego_parse_negTokenInit(struct gensec_security *gensec_
                 * time */
 
                if (NT_STATUS_EQUAL(nt_status, NT_STATUS_INVALID_PARAMETER)) {
-                       *unwrapped_out = data_blob(NULL, 0);
+                       *unwrapped_out = data_blob_null;
                        nt_status = NT_STATUS_MORE_PROCESSING_REQUIRED;
                }
 
@@ -426,9 +425,8 @@ static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec
 {
        int i;
        NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
-       DATA_BLOB null_data_blob = data_blob(NULL,0);
        const char **mechTypes = NULL;
-       DATA_BLOB unwrapped_out = data_blob(NULL, 0);
+       DATA_BLOB unwrapped_out = data_blob_null;
        const struct gensec_security_ops_wrapper *all_sec;
 
        mechTypes = gensec_security_oids(gensec_security, 
@@ -463,7 +461,7 @@ static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec
                        nt_status = gensec_update_ev(spnego_state->sub_sec_security,
                                                  out_mem_ctx, 
                                                  ev,
-                                                 null_data_blob,
+                                                 data_blob_null,
                                                  &unwrapped_out);
 
                        if (!NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) 
@@ -517,14 +515,14 @@ static NTSTATUS gensec_spnego_create_negTokenInit(struct gensec_security *gensec
 
                /* List the remaining mechs as options */
                spnego_out.negTokenInit.mechTypes = send_mech_types;
-               spnego_out.negTokenInit.reqFlags = null_data_blob;
+               spnego_out.negTokenInit.reqFlags = data_blob_null;
                spnego_out.negTokenInit.reqFlagsPadding = 0;
 
                if (spnego_state->state_position == SPNEGO_SERVER_START) {
                        spnego_out.negTokenInit.mechListMIC
                                = data_blob_string_const(ADS_IGNORE_PRINCIPAL);
                } else {
-                       spnego_out.negTokenInit.mechListMIC = null_data_blob;
+                       spnego_out.negTokenInit.mechListMIC = data_blob_null;
                }
 
                spnego_out.negTokenInit.mechToken = unwrapped_out;
@@ -564,7 +562,6 @@ static NTSTATUS gensec_spnego_server_negTokenTarg(struct spnego_state *spnego_st
                                                  DATA_BLOB *out)
 {
        struct spnego_data spnego_out;
-       DATA_BLOB null_data_blob = data_blob(NULL, 0);
 
        /* compose reply */
        spnego_out.type = SPNEGO_NEG_TOKEN_TARG;
@@ -589,7 +586,7 @@ static NTSTATUS gensec_spnego_server_negTokenTarg(struct spnego_state *spnego_st
                spnego_state->state_position = SPNEGO_DONE;
        } else {
                spnego_out.negTokenTarg.negResult = SPNEGO_REJECT;
-               spnego_out.negTokenTarg.mechListMIC = null_data_blob;
+               spnego_out.negTokenTarg.mechListMIC = data_blob_null;
                DEBUG(2, ("SPNEGO login failed: %s\n", nt_errstr(nt_status)));
                spnego_state->state_position = SPNEGO_DONE;
        }
@@ -611,15 +608,14 @@ static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TA
                                     const DATA_BLOB in, DATA_BLOB *out) 
 {
        struct spnego_state *spnego_state = (struct spnego_state *)gensec_security->private_data;
-       DATA_BLOB null_data_blob = data_blob(NULL, 0);
-       DATA_BLOB mech_list_mic = data_blob(NULL, 0);
-       DATA_BLOB unwrapped_out = data_blob(NULL, 0);
+       DATA_BLOB mech_list_mic = data_blob_null;
+       DATA_BLOB unwrapped_out = data_blob_null;
        struct spnego_data spnego_out;
        struct spnego_data spnego;
 
        ssize_t len;
 
-       *out = data_blob(NULL, 0);
+       *out = data_blob_null;
 
        if (!out_mem_ctx) {
                out_mem_ctx = spnego_state;
@@ -750,9 +746,9 @@ static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TA
                /* compose reply */
                spnego_out.type = SPNEGO_NEG_TOKEN_INIT;
                spnego_out.negTokenInit.mechTypes = my_mechs;
-               spnego_out.negTokenInit.reqFlags = null_data_blob;
+               spnego_out.negTokenInit.reqFlags = data_blob_null;
                spnego_out.negTokenInit.reqFlagsPadding = 0;
-               spnego_out.negTokenInit.mechListMIC = null_data_blob;
+               spnego_out.negTokenInit.mechListMIC = data_blob_null;
                spnego_out.negTokenInit.mechToken = unwrapped_out;
 
                if (spnego_write_data(out_mem_ctx, out, &spnego_out) == -1) {
@@ -1222,7 +1218,7 @@ static NTSTATUS gensec_spnego_update(struct gensec_security *gensec_security, TA
                } else {
 
                        /* all done - server has accepted, and we agree */
-                       *out = null_data_blob;
+                       *out = data_blob_null;
 
                        if (spnego.negTokenTarg.negResult != SPNEGO_ACCEPT_COMPLETED) {
                                /* unless of course it did not accept */