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 ret;
}
-
-/******************************************************************************
- Send/receive the request encryption blob.
-******************************************************************************/
-
-static NTSTATUS enc_blob_send_receive(struct cli_state *cli, DATA_BLOB *in, DATA_BLOB *out, DATA_BLOB *param_out)
-{
- uint16 setup;
- char param[4];
- char *rparam=NULL, *rdata=NULL;
- unsigned int rparam_count=0, rdata_count=0;
- NTSTATUS status = NT_STATUS_OK;
-
- setup = TRANSACT2_SETFSINFO;
-
- SSVAL(param,0,0);
- SSVAL(param,2,SMB_REQUEST_TRANSPORT_ENCRYPTION);
-
- if (!cli_send_trans(cli, SMBtrans2,
- NULL,
- 0, 0,
- &setup, 1, 0,
- param, 4, 0,
- (char *)in->data, in->length, CLI_BUFFER_SIZE)) {
- status = cli_nt_error(cli);
- goto out;
- }
-
- if (!cli_receive_trans(cli, SMBtrans2,
- &rparam, &rparam_count,
- &rdata, &rdata_count)) {
- status = cli_nt_error(cli);
- goto out;
- }
-
- if (cli_is_error(cli)) {
- status = cli_nt_error(cli);
- if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- goto out;
- }
- }
-
- *out = data_blob(rdata, rdata_count);
- *param_out = data_blob(rparam, rparam_count);
-
- out:
-
- SAFE_FREE(rparam);
- SAFE_FREE(rdata);
- 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;
-
- if (smb_enc_type == SMB_TRANS_ENC_GSS) {
-#if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
- es->s.gss_state = SMB_MALLOC_P(struct smb_tran_enc_state_gss);
- if (!es->s.gss_state) {
- SAFE_FREE(es);
- return NULL;
- }
- ZERO_STRUCTP(es->s.gss_state);
-#else
- DEBUG(0,("make_cli_enc_state: no krb5 compiled.\n"));
- SAFE_FREE(es);
- return NULL;
-#endif
- }
- return es;
-}
-
-/******************************************************************************
- Start a raw ntlmssp encryption.
-******************************************************************************/
-
-NTSTATUS cli_raw_ntlm_smb_encryption_start(struct cli_state *cli,
- const char *user,
- const char *pass,
- const char *domain)
-{
- DATA_BLOB blob_in = data_blob_null;
- DATA_BLOB blob_out = data_blob_null;
- DATA_BLOB param_out = data_blob_null;
- NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
- struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_NTLM);
-
- if (!es) {
- return NT_STATUS_NO_MEMORY;
- }
- status = ntlmssp_client_start(&es->s.ntlmssp_state);
- if (!NT_STATUS_IS_OK(status)) {
- goto fail;
- }
-
- ntlmssp_want_feature(es->s.ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
- es->s.ntlmssp_state->neg_flags |= (NTLMSSP_NEGOTIATE_SIGN|NTLMSSP_NEGOTIATE_SEAL);
-
- if (!NT_STATUS_IS_OK(status = ntlmssp_set_username(es->s.ntlmssp_state, user))) {
- goto fail;
- }
- if (!NT_STATUS_IS_OK(status = ntlmssp_set_domain(es->s.ntlmssp_state, domain))) {
- goto fail;
- }
- if (!NT_STATUS_IS_OK(status = ntlmssp_set_password(es->s.ntlmssp_state, pass))) {
- goto fail;
- }
-
- do {
- status = ntlmssp_update(es->s.ntlmssp_state, blob_in, &blob_out);
- data_blob_free(&blob_in);
- data_blob_free(¶m_out);
- if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(status)) {
- status = enc_blob_send_receive(cli, &blob_out, &blob_in, ¶m_out);
- }
- if (param_out.length == 2) {
- es->enc_ctx_num = SVAL(param_out.data, 0);
- }
- data_blob_free(&blob_out);
- } while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
-
- data_blob_free(&blob_in);
-
- 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;
-}
-
-#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, 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;
- DATA_BLOB blob_in = data_blob_null;
- char *host_princ_s = NULL;
- OM_uint32 ret_flags = 0;
- NTSTATUS status = NT_STATUS_OK;
-
- gss_OID_desc nt_hostbased_service =
- {10, CONST_DISCARD(char *,"\x2a\x86\x48\x86\xf7\x12\x01\x02\x01\x04")};
-
- 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,
- &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)) {
- ADS_STATUS adss = ADS_ERROR_GSS(ret, min);
- DEBUG(10,("make_cli_gss_blob: gss_init_sec_context failed with %s\n",
- ads_errstr(adss)));
- 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;
- DATA_BLOB blob_send = data_blob_null;
- DATA_BLOB param_out = data_blob_null;
- 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;
-}
-#else
-NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
-{
- return NT_STATUS_NOT_SUPPORTED;
-}
-#endif
git.samba.org / ira / wip.git / blobdiff