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-rw-r--r--source4/libcli/smb_composite/sesssetup.c80
1 files changed, 57 insertions, 23 deletions
diff --git a/source4/libcli/smb_composite/sesssetup.c b/source4/libcli/smb_composite/sesssetup.c
index 11ac37e257..92b49dc3d4 100644
--- a/source4/libcli/smb_composite/sesssetup.c
+++ b/source4/libcli/smb_composite/sesssetup.c
@@ -35,6 +35,7 @@
struct sesssetup_state {
union smb_sesssetup setup;
+ NTSTATUS remote_status;
NTSTATUS gensec_status;
struct smb_composite_sesssetup *io;
struct smbcli_request *req;
@@ -85,8 +86,15 @@ static void request_handler(struct smbcli_request *req)
DATA_BLOB session_key = data_blob(NULL, 0);
DATA_BLOB null_data_blob = data_blob(NULL, 0);
NTSTATUS session_key_err, nt_status;
+ struct smbcli_request *check_req = NULL;
- c->status = smb_raw_sesssetup_recv(req, state, &state->setup);
+ if (req->sign_caller_checks) {
+ req->do_not_free = true;
+ check_req = req;
+ }
+
+ state->remote_status = smb_raw_sesssetup_recv(req, state, &state->setup);
+ c->status = state->remote_status;
state->req = NULL;
switch (state->setup.old.level) {
@@ -102,6 +110,7 @@ static void request_handler(struct smbcli_request *req)
state->io,
&state->req);
if (NT_STATUS_IS_OK(nt_status)) {
+ talloc_free(check_req);
c->status = nt_status;
composite_continue_smb(c, state->req, request_handler, c);
return;
@@ -120,6 +129,7 @@ static void request_handler(struct smbcli_request *req)
state->io,
&state->req);
if (NT_STATUS_IS_OK(nt_status)) {
+ talloc_free(check_req);
c->status = nt_status;
composite_continue_smb(c, state->req, request_handler, c);
return;
@@ -138,6 +148,7 @@ static void request_handler(struct smbcli_request *req)
state->io,
&state->req);
if (NT_STATUS_IS_OK(nt_status)) {
+ talloc_free(check_req);
c->status = nt_status;
composite_continue_smb(c, state->req, request_handler, c);
return;
@@ -169,12 +180,16 @@ static void request_handler(struct smbcli_request *req)
state->setup.spnego.in.secblob = data_blob(NULL, 0);
}
- /* we need to do another round of session setup. We keep going until both sides
- are happy */
- session_key_err = gensec_session_key(session->gensec, &session_key);
- if (NT_STATUS_IS_OK(session_key_err)) {
- set_user_session_key(session, &session_key);
- smbcli_transport_simple_set_signing(session->transport, session_key, null_data_blob);
+ if (NT_STATUS_IS_OK(state->remote_status)) {
+ if (state->setup.spnego.in.secblob.length) {
+ c->status = NT_STATUS_INTERNAL_ERROR;
+ break;
+ }
+ session_key_err = gensec_session_key(session->gensec, &session_key);
+ if (NT_STATUS_IS_OK(session_key_err)) {
+ set_user_session_key(session, &session_key);
+ smbcli_transport_simple_set_signing(session->transport, session_key, null_data_blob);
+ }
}
if (state->setup.spnego.in.secblob.length) {
@@ -186,6 +201,9 @@ static void request_handler(struct smbcli_request *req)
session->vuid = state->io->out.vuid;
state->req = smb_raw_sesssetup_send(session, &state->setup);
session->vuid = vuid;
+ if (state->req) {
+ state->req->sign_caller_checks = true;
+ }
composite_continue_smb(c, state->req, request_handler, c);
return;
}
@@ -196,6 +214,15 @@ static void request_handler(struct smbcli_request *req)
break;
}
+ if (check_req) {
+ check_req->sign_caller_checks = false;
+ if (!smbcli_request_check_sign_mac(check_req)) {
+ c->status = NT_STATUS_ACCESS_DENIED;
+ }
+ talloc_free(check_req);
+ check_req = NULL;
+ }
+
/* enforce the local signing required flag */
if (NT_STATUS_IS_OK(c->status) && !cli_credentials_is_anonymous(state->io->in.credentials)) {
if (!session->transport->negotiate.sign_info.doing_signing
@@ -222,11 +249,14 @@ static NTSTATUS session_setup_nt1(struct composite_context *c,
struct smb_composite_sesssetup *io,
struct smbcli_request **req)
{
- NTSTATUS nt_status;
+ NTSTATUS nt_status = NT_STATUS_INTERNAL_ERROR;
struct sesssetup_state *state = talloc_get_type(c->private_data, struct sesssetup_state);
DATA_BLOB names_blob = NTLMv2_generate_names_blob(state, lp_iconv_convenience(global_loadparm), session->transport->socket->hostname, lp_workgroup(global_loadparm));
- DATA_BLOB session_key;
+ DATA_BLOB session_key = data_blob(NULL, 0);
int flags = CLI_CRED_NTLM_AUTH;
+
+ smbcli_temp_set_signing(session->transport);
+
if (session->options.lanman_auth) {
flags |= CLI_CRED_LANMAN_AUTH;
}
@@ -258,12 +288,6 @@ static NTSTATUS session_setup_nt1(struct composite_context *c,
&state->setup.nt1.in.password2,
NULL, &session_key);
NT_STATUS_NOT_OK_RETURN(nt_status);
-
- smbcli_transport_simple_set_signing(session->transport, session_key,
- state->setup.nt1.in.password2);
- set_user_session_key(session, &session_key);
-
- data_blob_free(&session_key);
} else if (session->options.plaintext_auth) {
const char *password = cli_credentials_get_password(io->in.credentials);
state->setup.nt1.in.password1 = data_blob_talloc(state, password, strlen(password));
@@ -277,6 +301,15 @@ static NTSTATUS session_setup_nt1(struct composite_context *c,
if (!*req) {
return NT_STATUS_NO_MEMORY;
}
+
+ if (NT_STATUS_IS_OK(nt_status)) {
+ smbcli_transport_simple_set_signing(session->transport, session_key,
+ state->setup.nt1.in.password2);
+ set_user_session_key(session, &session_key);
+
+ data_blob_free(&session_key);
+ }
+
return (*req)->status;
}
@@ -350,9 +383,7 @@ static NTSTATUS session_setup_spnego(struct composite_context *c,
struct smbcli_request **req)
{
struct sesssetup_state *state = talloc_get_type(c->private_data, struct sesssetup_state);
- NTSTATUS status, session_key_err;
- DATA_BLOB session_key = data_blob(NULL, 0);
- DATA_BLOB null_data_blob = data_blob(NULL, 0);
+ NTSTATUS status;
const char *chosen_oid = NULL;
state->setup.spnego.level = RAW_SESSSETUP_SPNEGO;
@@ -440,15 +471,18 @@ static NTSTATUS session_setup_spnego(struct composite_context *c,
}
state->gensec_status = status;
- session_key_err = gensec_session_key(session->gensec, &session_key);
- if (NT_STATUS_IS_OK(session_key_err)) {
- smbcli_transport_simple_set_signing(session->transport, session_key, null_data_blob);
- }
-
*req = smb_raw_sesssetup_send(session, &state->setup);
if (!*req) {
return NT_STATUS_NO_MEMORY;
}
+
+ /*
+ * we need to check the signature ourself
+ * as the session key might be the acceptor subkey
+ * which comes within the response itself
+ */
+ (*req)->sign_caller_checks = true;
+
return (*req)->status;
}
generated by cgit (git 2.34.1) at 2024-11-08 05:32:26 +0000