Unix SMB/CIFS implementation.
FS info functions
Copyright (C) Stefan (metze) Metzmacher 2003
+ Copyright (C) Jeremy Allison 2007.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
return status;
}
+/******************************************************************************
+ Make a client state struct.
+******************************************************************************/
+
+static struct smb_trans_enc_state *make_cli_enc_state(enum smb_trans_enc_type smb_enc_type)
+{
+ struct smb_trans_enc_state *es = NULL;
+ es = SMB_MALLOC_P(struct smb_trans_enc_state);
+ if (!es) {
+ return NULL;
+ }
+ ZERO_STRUCTP(es);
+ es->smb_enc_type = smb_enc_type;
+ return es;
+}
+
/******************************************************************************
Start a raw ntlmssp encryption.
******************************************************************************/
DATA_BLOB blob_out = data_blob(NULL, 0);
DATA_BLOB param_out = data_blob(NULL, 0);
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
- struct smb_trans_enc_state *es = NULL;
+ struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_NTLM);
- es = SMB_MALLOC_P(struct smb_trans_enc_state);
if (!es) {
return NT_STATUS_NO_MEMORY;
}
- ZERO_STRUCTP(es);
- es->smb_enc_type = SMB_TRANS_ENC_NTLM;
status = ntlmssp_client_start(&es->s.ntlmssp_state);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
common_free_encryption_state(&es);
return status;
}
+
+#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
+
+#ifndef SMB_GSS_REQUIRED_FLAGS
+#define SMB_GSS_REQUIRED_FLAGS (GSS_C_CONF_FLAG|GSS_C_INTEG_FLAG|GSS_C_MUTUAL_FLAG|GSS_C_REPLAY_FLAG|GSS_C_SEQUENCE_FLAG)
+#endif
+
+/******************************************************************************
+ Get client gss blob to send to a server.
+******************************************************************************/
+
+static NTSTATUS make_cli_gss_blob(struct smb_trans_enc_state *es,
+ const char *service,
+ const char *host,
+ NTSTATUS status_in,
+ DATA_BLOB spnego_blob_in,
+ DATA_BLOB *p_blob_out)
+{
+ const char *krb_mechs[] = {OID_KERBEROS5_OLD, OID_KERBEROS5, NULL};
+ OM_uint32 ret;
+ OM_uint32 min;
+ gss_name_t srv_name;
+ gss_buffer_desc input_name;
+ gss_buffer_desc *p_tok_in;
+ gss_buffer_desc tok_out, tok_in;
+ DATA_BLOB blob_out = data_blob(NULL, 0);
+ DATA_BLOB blob_in = data_blob(NULL, 0);
+ char *host_princ_s = NULL;
+ OM_uint32 ret_flags = 0;
+ NTSTATUS status = NT_STATUS_OK;
+
+ memset(&tok_out, '\0', sizeof(tok_out));
+
+ /* Get a ticket for the service@host */
+ asprintf(&host_princ_s, "%s@%s", service, host);
+ if (host_princ_s == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ input_name.value = host_princ_s;
+ input_name.length = strlen(host_princ_s) + 1;
+
+ ret = gss_import_name(&min,
+ &input_name,
+ GSS_C_NT_HOSTBASED_SERVICE,
+ &srv_name);
+
+ if (ret != GSS_S_COMPLETE) {
+ SAFE_FREE(host_princ_s);
+ return map_nt_error_from_gss(ret, min);
+ }
+
+ if (spnego_blob_in.length == 0) {
+ p_tok_in = GSS_C_NO_BUFFER;
+ } else {
+ /* Remove the SPNEGO wrapper */
+ if (!spnego_parse_auth_response(spnego_blob_in, status_in, OID_KERBEROS5, &blob_in)) {
+ status = NT_STATUS_UNSUCCESSFUL;
+ goto fail;
+ }
+ tok_in.value = blob_in.data;
+ tok_in.length = blob_in.length;
+ p_tok_in = &tok_in;
+ }
+
+ ret = gss_init_sec_context(&min,
+ GSS_C_NO_CREDENTIAL, /* Use our default cred. */
+ &es->s.gss_state->gss_ctx,
+ srv_name,
+ GSS_C_NO_OID, /* default OID. */
+ GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG,
+ GSS_C_INDEFINITE, /* requested ticket lifetime. */
+ NULL, /* no channel bindings */
+ p_tok_in,
+ NULL, /* ignore mech type */
+ &tok_out,
+ &ret_flags,
+ NULL); /* ignore time_rec */
+
+ status = map_nt_error_from_gss(ret, min);
+ if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ goto fail;
+ }
+
+ if ((ret_flags & SMB_GSS_REQUIRED_FLAGS) != SMB_GSS_REQUIRED_FLAGS) {
+ status = NT_STATUS_ACCESS_DENIED;
+ }
+
+ blob_out = data_blob(tok_out.value, tok_out.length);
+
+ /* Wrap in an SPNEGO wrapper */
+ *p_blob_out = gen_negTokenTarg(krb_mechs, blob_out);
+
+ fail:
+
+ data_blob_free(&blob_out);
+ data_blob_free(&blob_in);
+ SAFE_FREE(host_princ_s);
+ gss_release_name(&min, &srv_name);
+ if (tok_out.value) {
+ gss_release_buffer(&min, &tok_out);
+ }
+ return status;
+}
+
+/******************************************************************************
+ Start a SPNEGO gssapi encryption context.
+******************************************************************************/
+
+NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
+{
+ DATA_BLOB blob_recv = data_blob(NULL, 0);
+ DATA_BLOB blob_send = data_blob(NULL, 0);
+ DATA_BLOB param_out = data_blob(NULL, 0);
+ NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
+ fstring fqdn;
+ const char *servicename;
+ struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_GSS);
+
+ if (!es) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ name_to_fqdn(fqdn, cli->desthost);
+ strlower_m(fqdn);
+
+ servicename = "cifs";
+ status = make_cli_gss_blob(es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
+ if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ servicename = "host";
+ status = make_cli_gss_blob(es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
+ if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ goto fail;
+ }
+ }
+
+ do {
+ data_blob_free(&blob_recv);
+ status = enc_blob_send_receive(cli, &blob_send, &blob_recv, ¶m_out);
+ if (param_out.length == 2) {
+ es->enc_ctx_num = SVAL(param_out.data, 0);
+ }
+ data_blob_free(&blob_send);
+ status = make_cli_gss_blob(es, servicename, fqdn, status, blob_recv, &blob_send);
+ } while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
+ data_blob_free(&blob_recv);
+
+ if (NT_STATUS_IS_OK(status)) {
+ /* Replace the old state, if any. */
+ if (cli->trans_enc_state) {
+ common_free_encryption_state(&cli->trans_enc_state);
+ }
+ cli->trans_enc_state = es;
+ cli->trans_enc_state->enc_on = True;
+ es = NULL;
+ }
+
+ fail:
+
+ common_free_encryption_state(&es);
+ return status;
+}
+#endif
OM_uint32 flags = 0;
gss_buffer_desc in_buf, out_buf;
struct smb_tran_enc_state_gss *gss_state;
+ DATA_BLOB auth_reply = data_blob(NULL,0);
+ DATA_BLOB response = data_blob(NULL,0);
+ NTSTATUS status;
if (!partial_srv_trans_enc_ctx) {
- NTSTATUS status = make_srv_encryption_context(SMB_TRANS_ENC_GSS, &partial_srv_trans_enc_ctx);
+ status = make_srv_encryption_context(SMB_TRANS_ENC_GSS, &partial_srv_trans_enc_ctx);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
NULL, /* Ingore time. */
NULL); /* Ignore delegated creds. */
+ status = gss_err_to_ntstatus(ret, min);
if (ret != GSS_S_COMPLETE && ret != GSS_S_CONTINUE_NEEDED) {
- return gss_err_to_ntstatus(ret, min);
+ return status;
}
/* Ensure we've got sign+seal available. */
}
}
- SAFE_FREE(*ppdata);
- *ppdata = memdup(out_buf.value, out_buf.length);
- if (!*ppdata) {
- gss_release_buffer(&min, &out_buf);
- return NT_STATUS_NO_MEMORY;
- }
- *p_data_size = out_buf.length;
+ auth_reply = data_blob(out_buf.value, out_buf.length);
gss_release_buffer(&min, &out_buf);
- if (ret != GSS_S_CONTINUE_NEEDED) {
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
- } else {
- return NT_STATUS_OK;
- }
+ /* Wrap in SPNEGO. */
+ response = spnego_gen_auth_response(&auth_reply, status, OID_KERBEROS5);
+ data_blob_free(&auth_reply);
+
+ SAFE_FREE(*ppdata);
+ *ppdata = response.data;
+ *p_data_size = response.length;
+
+ return status;
}
#endif
git.samba.org / samba.git / commitdiff