static int negprot_spnego(char *p)
{
DATA_BLOB blob;
nstring dos_name;
fstring unix_name;
uint8 guid[17];
const char *OIDs_krb5[] = {OID_KERBEROS5,
OID_KERBEROS5_OLD,
OID_NTLMSSP,
NULL
};
const char *OIDs_plain[] = {OID_NTLMSSP, NULL};
char *principal;
int len;
global_spnego_negotiated = True;
ZERO_STRUCT(guid);
safe_strcpy(unix_name, global_myname(), sizeof(unix_name)-1);
strlower_m(unix_name);
push_ascii_nstring(dos_name, unix_name);
safe_strcpy((char *)guid, dos_name, sizeof(guid)-1);
#ifdef DEVELOPER
/* valgrind fixer... */
{
size_t sl = strlen(guid);
if (sizeof(guid)-sl)
memset(&guid[sl], '\0', sizeof(guid)-sl);
}
#endif
#if 0
/* strangely enough, NT does not sent the single OID NTLMSSP when
not a ADS member, it sends no OIDs at all
we can't do this until we teach our sesssion setup parser to know
about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)
*/
if (lp_security() != SEC_ADS) {
memcpy(p, guid, 16);
return 16;
}
#endif
if (lp_security() != SEC_ADS) {
blob = spnego_gen_negTokenInit(guid, OIDs_plain, "NONE");
} else {
asprintf(&principal, "%s$@%s", guid, lp_realm());
blob = spnego_gen_negTokenInit(guid, OIDs_krb5, principal);
free(principal);
}
memcpy(p, blob.data, blob.length);
len = blob.length;
data_blob_free(&blob);
return len;
}
/*
generate a SPNEGO krb5 negTokenInit packet, ready for a EXTENDED_SECURITY
kerberos session setup
*/
int spnego_gen_krb5_negTokenInit(TALLOC_CTX *ctx,
const char *principal, int time_offset,
DATA_BLOB *targ,
DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
time_t *expire_time)
{
int retval;
DATA_BLOB tkt, tkt_wrapped;
const char *krb_mechs[] = {OID_KERBEROS5_OLD, OID_KERBEROS5, OID_NTLMSSP, NULL};
/* get a kerberos ticket for the service and extract the session key */
retval = cli_krb5_get_ticket(ctx, principal, time_offset,
&tkt, session_key_krb5,
extra_ap_opts, NULL,
expire_time, NULL);
if (retval) {
return retval;
}
/* wrap that up in a nice GSS-API wrapping */
tkt_wrapped = spnego_gen_krb5_wrap(ctx, tkt, TOK_ID_KRB_AP_REQ);
/* and wrap that in a shiny SPNEGO wrapper */
*targ = spnego_gen_negTokenInit(ctx, krb_mechs, &tkt_wrapped, NULL);
data_blob_free(&tkt_wrapped);
data_blob_free(&tkt);
return retval;
}
int spnego_gen_krb5_negTokenInit(/*
const char *principal, int time_offset,
DATA_BLOB *targ,
DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
const char *ccname, time_t *expire_time*/)
{
/* get a kerberos ticket for the service and extract the session key */
cli_krb5_get_ticket();
/* wrap that up in a nice GSS-API wrapping: CREATE AP_REQ*/
spnego_gen_krb5_wrap();
/*generate spnego with AP_REQ data*/
spnego_gen_negTokenInit();
}
static DATA_BLOB negprot_spnego(void)
{
DATA_BLOB blob;
nstring dos_name;
fstring unix_name;
#ifdef DEVELOPER
size_t slen;
#endif
char guid[17];
const char *OIDs_krb5[] = {OID_KERBEROS5,
OID_KERBEROS5_OLD,
OID_NTLMSSP,
NULL};
const char *OIDs_plain[] = {OID_NTLMSSP, NULL};
global_spnego_negotiated = True;
memset(guid, '\0', sizeof(guid));
safe_strcpy(unix_name, global_myname(), sizeof(unix_name)-1);
strlower_m(unix_name);
push_ascii_nstring(dos_name, unix_name);
safe_strcpy(guid, dos_name, sizeof(guid)-1);
#ifdef DEVELOPER
/* Fix valgrind 'uninitialized bytes' issue. */
slen = strlen(dos_name);
if (slen < sizeof(guid)) {
memset(guid+slen, '\0', sizeof(guid) - slen);
}
#endif
/* strangely enough, NT does not sent the single OID NTLMSSP when
not a ADS member, it sends no OIDs at all
OLD COMMENT : "we can't do this until we teach our sesssion setup parser to know
about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)"
Our sessionsetup code now handles raw NTLMSSP connects, so we can go
back to doing what W2K3 does here. This is needed to make PocketPC 2003
CIFS connections work with SPNEGO. See bugzilla bugs #1828 and #3133
for details. JRA.
*/
if (lp_security() != SEC_ADS && !lp_use_kerberos_keytab()) {
#if 0
/* Code for PocketPC client */
blob = data_blob(guid, 16);
#else
/* Code for standalone WXP client */
blob = spnego_gen_negTokenInit(guid, OIDs_plain, "NONE");
#endif
} else {
fstring myname;
char *host_princ_s = NULL;
const char * lkdc_realm =
lp_parm_talloc_string(GLOBAL_SECTION_SNUM,
"com.apple", "lkdc realm", NULL);
myname[0] = '\0';
get_mydnsfullname(myname);
strlower_m(myname);
/* If we have a LKDC, use it unless there is a managed realm
* also configured. The managed realm should have precedence.
*/
if (lkdc_realm && (*lp_realm() == '\0' ||
strcmp(lkdc_realm, lp_realm()) == 0)) {
asprintf(&host_princ_s,
"cifs/%s@%s", lkdc_realm, lkdc_realm);
} else {
asprintf(&host_princ_s, "cifs/%s@%s",
myname, lp_realm());
}
blob = spnego_gen_negTokenInit(guid, OIDs_krb5, host_princ_s);
SAFE_FREE(host_princ_s);
TALLOC_FREE(lkdc_realm);
}
return blob;
}
DATA_BLOB negprot_spnego(TALLOC_CTX *ctx, struct smbd_server_connection *sconn)
{
DATA_BLOB blob = data_blob_null;
DATA_BLOB blob_out = data_blob_null;
nstring dos_name;
fstring unix_name;
#ifdef DEVELOPER
size_t slen;
#endif
const char *OIDs_krb5[] = {OID_KERBEROS5,
OID_KERBEROS5_OLD,
OID_NTLMSSP,
NULL};
const char *OIDs_ntlm[] = {OID_NTLMSSP, NULL};
sconn->smb1.negprot.spnego = true;
/* strangely enough, NT does not sent the single OID NTLMSSP when
not a ADS member, it sends no OIDs at all
OLD COMMENT : "we can't do this until we teach our sesssion setup parser to know
about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)"
Our sessionsetup code now handles raw NTLMSSP connects, so we can go
back to doing what W2K3 does here. This is needed to make PocketPC 2003
CIFS connections work with SPNEGO. See bugzilla bugs #1828 and #3133
for details. JRA.
*/
if (lp_security() != SEC_ADS && !USE_KERBEROS_KEYTAB) {
#if 0
/* Code for PocketPC client */
blob = data_blob(guid, 16);
#else
/* Code for standalone WXP client */
blob = spnego_gen_negTokenInit(ctx, OIDs_ntlm, NULL, "NONE");
#endif
} else if (!lp_send_spnego_principal()) {
/* By default, Windows 2008 and later sends not_defined_in_RFC4178@please_ignore */
blob = spnego_gen_negTokenInit(ctx, OIDs_krb5, NULL, ADS_IGNORE_PRINCIPAL);
} else {
fstring myname;
char *host_princ_s = NULL;
name_to_fqdn(myname, global_myname());
strlower_m(myname);
if (asprintf(&host_princ_s, "cifs/%s@%s", myname, lp_realm())
== -1) {
return data_blob_null;
}
blob = spnego_gen_negTokenInit(ctx, OIDs_krb5, NULL, host_princ_s);
SAFE_FREE(host_princ_s);
}
if (blob.length == 0 || blob.data == NULL) {
return data_blob_null;
}
blob_out = data_blob_talloc(ctx, NULL, 16 + blob.length);
if (blob_out.data == NULL) {
data_blob_free(&blob);
return data_blob_null;
}
memset(blob_out.data, '\0', 16);
safe_strcpy(unix_name, global_myname(), sizeof(unix_name)-1);
strlower_m(unix_name);
push_ascii_nstring(dos_name, unix_name);
strlcpy((char *)blob_out.data, dos_name, 17);
#ifdef DEVELOPER
/* Fix valgrind 'uninitialized bytes' issue. */
slen = strlen(dos_name);
if (slen < 16) {
memset(blob_out.data+slen, '\0', 16 - slen);
}
#endif
memcpy(&blob_out.data[16], blob.data, blob.length);
data_blob_free(&blob);
return blob_out;
}
/*
perform a LDAP/SASL/SPNEGO/GSSKRB5 bind
*/
static ADS_STATUS ads_sasl_spnego_gsskrb5_bind(ADS_STRUCT *ads, const gss_name_t serv_name)
{
ADS_STATUS status;
bool ok;
uint32 minor_status;
int gss_rc, rc;
gss_cred_id_t gss_cred = GSS_C_NO_CREDENTIAL;
gss_OID_desc krb5_mech_type =
{9, discard_const_p(char, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02") };
gss_OID mech_type = &krb5_mech_type;
gss_OID actual_mech_type = GSS_C_NULL_OID;
const char *spnego_mechs[] = {OID_KERBEROS5_OLD, OID_KERBEROS5, OID_NTLMSSP, NULL};
gss_ctx_id_t context_handle = GSS_C_NO_CONTEXT;
gss_buffer_desc input_token, output_token;
uint32 req_flags, ret_flags;
uint32 req_tmp, ret_tmp;
DATA_BLOB unwrapped;
DATA_BLOB wrapped;
struct berval cred, *scred = NULL;
status = ads_init_gssapi_cred(ads, &gss_cred);
if (!ADS_ERR_OK(status)) {
goto failed;
}
input_token.value = NULL;
input_token.length = 0;
req_flags = GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG;
switch (ads->ldap.wrap_type) {
case ADS_SASLWRAP_TYPE_SEAL:
req_flags |= GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG;
break;
case ADS_SASLWRAP_TYPE_SIGN:
req_flags |= GSS_C_INTEG_FLAG;
break;
case ADS_SASLWRAP_TYPE_PLAIN:
break;
}
/* Note: here we explicit ask for the krb5 mech_type */
gss_rc = gss_init_sec_context(&minor_status,
gss_cred,
&context_handle,
serv_name,
mech_type,
req_flags,
0,
NULL,
&input_token,
&actual_mech_type,
&output_token,
&ret_flags,
NULL);
if (gss_rc && gss_rc != GSS_S_CONTINUE_NEEDED) {
status = ADS_ERROR_GSS(gss_rc, minor_status);
goto failed;
}
/*
* As some gssapi krb5 mech implementations
* automaticly add GSS_C_INTEG_FLAG and GSS_C_CONF_FLAG
* to req_flags internaly, it's not possible to
* use plain or signing only connection via
* the gssapi interface.
*
* Because of this we need to check it the ret_flags
* has more flags as req_flags and correct the value
* of ads->ldap.wrap_type.
*
* I ads->auth.flags has ADS_AUTH_SASL_FORCE
* we need to give an error.
*/
req_tmp = req_flags & (GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
ret_tmp = ret_flags & (GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
if (req_tmp == ret_tmp) {
/* everythings fine... */
} else if (req_flags & GSS_C_CONF_FLAG) {
/*
* here we wanted sealing but didn't got it
* from the gssapi library
*/
status = ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED);
goto failed;
} else if ((req_flags & GSS_C_INTEG_FLAG) &&
!(ret_flags & GSS_C_INTEG_FLAG)) {
/*
* here we wanted siging but didn't got it
* from the gssapi library
*/
status = ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED);
goto failed;
} else if (ret_flags & GSS_C_CONF_FLAG) {
/*
* here we didn't want sealing
* but the gssapi library forces it
* so correct the needed wrap_type if
* the caller didn't forced siging only
*/
if (ads->auth.flags & ADS_AUTH_SASL_FORCE) {
status = ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED);
goto failed;
}
ads->ldap.wrap_type = ADS_SASLWRAP_TYPE_SEAL;
req_flags = ret_flags;
} else if (ret_flags & GSS_C_INTEG_FLAG) {
/*
* here we didn't want signing
* but the gssapi library forces it
* so correct the needed wrap_type if
* the caller didn't forced plain
*/
if (ads->auth.flags & ADS_AUTH_SASL_FORCE) {
status = ADS_ERROR_NT(NT_STATUS_NOT_SUPPORTED);
goto failed;
}
ads->ldap.wrap_type = ADS_SASLWRAP_TYPE_SIGN;
req_flags = ret_flags;
} else {
/*
* This could (should?) not happen
*/
status = ADS_ERROR_NT(NT_STATUS_INTERNAL_ERROR);
goto failed;
}
/* and wrap that in a shiny SPNEGO wrapper */
unwrapped = data_blob_const(output_token.value, output_token.length);
wrapped = spnego_gen_negTokenInit(talloc_tos(),
spnego_mechs, &unwrapped, NULL);
gss_release_buffer(&minor_status, &output_token);
if (unwrapped.length > wrapped.length) {
status = ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
goto failed;
}
cred.bv_val = (char *)wrapped.data;
cred.bv_len = wrapped.length;
rc = ldap_sasl_bind_s(ads->ldap.ld, NULL, "GSS-SPNEGO", &cred, NULL, NULL,
&scred);
data_blob_free(&wrapped);
if (rc != LDAP_SUCCESS) {
status = ADS_ERROR(rc);
goto failed;
}
if (scred) {
wrapped = data_blob_const(scred->bv_val, scred->bv_len);
} else {
wrapped = data_blob_null;
}
ok = spnego_parse_auth_response(talloc_tos(), wrapped, NT_STATUS_OK,
OID_KERBEROS5_OLD,
&unwrapped);
if (scred) ber_bvfree(scred);
if (!ok) {
status = ADS_ERROR_NT(NT_STATUS_INVALID_NETWORK_RESPONSE);
goto failed;
}
input_token.value = unwrapped.data;
input_token.length = unwrapped.length;
/*
* As we asked for mutal authentication
* we need to pass the servers response
* to gssapi
*/
gss_rc = gss_init_sec_context(&minor_status,
gss_cred,
&context_handle,
serv_name,
mech_type,
req_flags,
0,
NULL,
&input_token,
&actual_mech_type,
&output_token,
&ret_flags,
NULL);
data_blob_free(&unwrapped);
if (gss_rc) {
status = ADS_ERROR_GSS(gss_rc, minor_status);
goto failed;
}
gss_release_buffer(&minor_status, &output_token);
/*
* If we the sign and seal options
* doesn't match after getting the response
* from the server, we don't want to use the connection
*/
req_tmp = req_flags & (GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
ret_tmp = ret_flags & (GSS_C_INTEG_FLAG | GSS_C_CONF_FLAG);
if (req_tmp != ret_tmp) {
/* everythings fine... */
status = ADS_ERROR_NT(NT_STATUS_INVALID_NETWORK_RESPONSE);
goto failed;
}
if (ads->ldap.wrap_type > ADS_SASLWRAP_TYPE_PLAIN) {
uint32 max_msg_size = ADS_SASL_WRAPPING_OUT_MAX_WRAPPED;
gss_rc = gss_wrap_size_limit(&minor_status, context_handle,
(ads->ldap.wrap_type == ADS_SASLWRAP_TYPE_SEAL),
GSS_C_QOP_DEFAULT,
max_msg_size, &ads->ldap.out.max_unwrapped);
if (gss_rc) {
status = ADS_ERROR_GSS(gss_rc, minor_status);
goto failed;
}
ads->ldap.out.sig_size = max_msg_size - ads->ldap.out.max_unwrapped;
ads->ldap.in.min_wrapped = 0x2C; /* taken from a capture with LDAP unbind */
ads->ldap.in.max_wrapped = max_msg_size;
status = ads_setup_sasl_wrapping(ads, &ads_sasl_gssapi_ops, context_handle);
if (!ADS_ERR_OK(status)) {
DEBUG(0, ("ads_setup_sasl_wrapping() failed: %s\n",
ads_errstr(status)));
goto failed;
}
/* make sure we don't free context_handle */
context_handle = GSS_C_NO_CONTEXT;
}
status = ADS_SUCCESS;
failed:
if (gss_cred != GSS_C_NO_CREDENTIAL)
gss_release_cred(&minor_status, &gss_cred);
if (context_handle != GSS_C_NO_CONTEXT)
gss_delete_sec_context(&minor_status, &context_handle, GSS_C_NO_BUFFER);
return status;
}
/*
perform a LDAP/SASL/SPNEGO/NTLMSSP bind (just how many layers can
we fit on one socket??)
*/
static ADS_STATUS ads_sasl_spnego_ntlmssp_bind(ADS_STRUCT *ads)
{
DATA_BLOB msg1 = data_blob_null;
DATA_BLOB blob = data_blob_null;
DATA_BLOB blob_in = data_blob_null;
DATA_BLOB blob_out = data_blob_null;
struct berval cred, *scred = NULL;
int rc;
NTSTATUS nt_status;
ADS_STATUS status;
int turn = 1;
struct auth_generic_state *auth_generic_state;
nt_status = auth_generic_client_prepare(NULL, &auth_generic_state);
if (!NT_STATUS_IS_OK(nt_status)) {
return ADS_ERROR_NT(nt_status);
}
if (!NT_STATUS_IS_OK(nt_status = auth_generic_set_username(auth_generic_state, ads->auth.user_name))) {
return ADS_ERROR_NT(nt_status);
}
if (!NT_STATUS_IS_OK(nt_status = auth_generic_set_domain(auth_generic_state, ads->auth.realm))) {
return ADS_ERROR_NT(nt_status);
}
if (!NT_STATUS_IS_OK(nt_status = auth_generic_set_password(auth_generic_state, ads->auth.password))) {
return ADS_ERROR_NT(nt_status);
}
switch (ads->ldap.wrap_type) {
case ADS_SASLWRAP_TYPE_SEAL:
gensec_want_feature(auth_generic_state->gensec_security, GENSEC_FEATURE_SIGN);
gensec_want_feature(auth_generic_state->gensec_security, GENSEC_FEATURE_SEAL);
break;
case ADS_SASLWRAP_TYPE_SIGN:
if (ads->auth.flags & ADS_AUTH_SASL_FORCE) {
gensec_want_feature(auth_generic_state->gensec_security, GENSEC_FEATURE_SIGN);
} else {
/*
* windows servers are broken with sign only,
* so we need to use seal here too
*/
gensec_want_feature(auth_generic_state->gensec_security, GENSEC_FEATURE_SIGN);
gensec_want_feature(auth_generic_state->gensec_security, GENSEC_FEATURE_SEAL);
ads->ldap.wrap_type = ADS_SASLWRAP_TYPE_SEAL;
}
break;
case ADS_SASLWRAP_TYPE_PLAIN:
break;
}
nt_status = auth_generic_client_start(auth_generic_state, GENSEC_OID_NTLMSSP);
if (!NT_STATUS_IS_OK(nt_status)) {
return ADS_ERROR_NT(nt_status);
}
blob_in = data_blob_null;
do {
nt_status = gensec_update(auth_generic_state->gensec_security,
talloc_tos(), NULL, blob_in, &blob_out);
data_blob_free(&blob_in);
if ((NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
|| NT_STATUS_IS_OK(nt_status))
&& blob_out.length) {
if (turn == 1) {
const char *OIDs_ntlm[] = {OID_NTLMSSP, NULL};
/* and wrap it in a SPNEGO wrapper */
msg1 = spnego_gen_negTokenInit(talloc_tos(),
OIDs_ntlm, &blob_out, NULL);
} else {
/* wrap it in SPNEGO */
msg1 = spnego_gen_auth(talloc_tos(), blob_out);
}
data_blob_free(&blob_out);
cred.bv_val = (char *)msg1.data;
cred.bv_len = msg1.length;
scred = NULL;
rc = ldap_sasl_bind_s(ads->ldap.ld, NULL, "GSS-SPNEGO", &cred, NULL, NULL, &scred);
data_blob_free(&msg1);
if ((rc != LDAP_SASL_BIND_IN_PROGRESS) && (rc != 0)) {
if (scred) {
ber_bvfree(scred);
}
TALLOC_FREE(auth_generic_state);
return ADS_ERROR(rc);
}
if (scred) {
blob = data_blob(scred->bv_val, scred->bv_len);
ber_bvfree(scred);
} else {
blob = data_blob_null;
}
} else {
TALLOC_FREE(auth_generic_state);
data_blob_free(&blob_out);
return ADS_ERROR_NT(nt_status);
}
if ((turn == 1) &&
(rc == LDAP_SASL_BIND_IN_PROGRESS)) {
DATA_BLOB tmp_blob = data_blob_null;
/* the server might give us back two challenges */
if (!spnego_parse_challenge(talloc_tos(), blob, &blob_in,
&tmp_blob)) {
TALLOC_FREE(auth_generic_state);
data_blob_free(&blob);
DEBUG(3,("Failed to parse challenges\n"));
return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
}
data_blob_free(&tmp_blob);
} else if (rc == LDAP_SASL_BIND_IN_PROGRESS) {
if (!spnego_parse_auth_response(talloc_tos(), blob, nt_status, OID_NTLMSSP,
&blob_in)) {
TALLOC_FREE(auth_generic_state);
data_blob_free(&blob);
DEBUG(3,("Failed to parse auth response\n"));
return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
}
}
data_blob_free(&blob);
data_blob_free(&blob_out);
turn++;
} while (rc == LDAP_SASL_BIND_IN_PROGRESS && !NT_STATUS_IS_OK(nt_status));
if (ads->ldap.wrap_type > ADS_SASLWRAP_TYPE_PLAIN) {
uint32_t sig_size = gensec_sig_size(auth_generic_state->gensec_security, 0);
ads->ldap.out.max_unwrapped = ADS_SASL_WRAPPING_OUT_MAX_WRAPPED - sig_size;
ads->ldap.out.sig_size = sig_size;
ads->ldap.in.min_wrapped = ads->ldap.out.sig_size;
ads->ldap.in.max_wrapped = ADS_SASL_WRAPPING_IN_MAX_WRAPPED;
status = ads_setup_sasl_wrapping(ads, &ads_sasl_ntlmssp_ops, auth_generic_state->gensec_security);
if (!ADS_ERR_OK(status)) {
DEBUG(0, ("ads_setup_sasl_wrapping() failed: %s\n",
ads_errstr(status)));
TALLOC_FREE(auth_generic_state);
return status;
}
/* Only keep the gensec_security element around long-term */
talloc_steal(NULL, auth_generic_state->gensec_security);
}
TALLOC_FREE(auth_generic_state);
return ADS_ERROR(rc);
}
static int negprot_spnego(char *p, uint8 *pkeylen)
{
DATA_BLOB blob;
nstring dos_name;
fstring unix_name;
char guid[17];
const char *OIDs_krb5[] = {OID_KERBEROS5,
OID_KERBEROS5_OLD,
OID_NTLMSSP,
NULL};
const char *OIDs_plain[] = {OID_NTLMSSP, NULL};
int len;
global_spnego_negotiated = True;
ZERO_STRUCT(guid);
safe_strcpy(unix_name, global_myname(), sizeof(unix_name)-1);
strlower_m(unix_name);
push_ascii_nstring(dos_name, unix_name);
safe_strcpy(guid, dos_name, sizeof(guid)-1);
#ifdef DEVELOPER
/* valgrind fixer... */
{
size_t sl = strlen(guid);
if (sizeof(guid)-sl)
memset(&guid[sl], '\0', sizeof(guid)-sl);
}
#endif
/* strangely enough, NT does not sent the single OID NTLMSSP when
not a ADS member, it sends no OIDs at all
OLD COMMENT : "we can't do this until we teach our sesssion setup parser to know
about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)"
Our sessionsetup code now handles raw NTLMSSP connects, so we can go
back to doing what W2K3 does here. This is needed to make PocketPC 2003
CIFS connections work with SPNEGO. See bugzilla bugs #1828 and #3133
for details. JRA.
*/
if (lp_security() != SEC_ADS && !lp_use_kerberos_keytab()) {
#if 0
/* Code for PocketPC client */
blob = data_blob(guid, 16);
#else
/* Code for standalone WXP client */
blob = spnego_gen_negTokenInit(guid, OIDs_plain, "NONE");
#endif
} else {
fstring myname;
char *host_princ_s = NULL;
name_to_fqdn(myname, global_myname());
strlower_m(myname);
asprintf(&host_princ_s, "cifs/%s@%s", myname, lp_realm());
blob = spnego_gen_negTokenInit(guid, OIDs_krb5, host_princ_s);
SAFE_FREE(host_princ_s);
}
memcpy(p, blob.data, blob.length);
len = blob.length;
if (len > 256) {
DEBUG(0,("negprot_spnego: blob length too long (%d)\n", len));
len = 255;
}
data_blob_free(&blob);
if (lp_security() != SEC_ADS && !lp_use_kerberos_keytab()) {
*pkeylen = 0;
} else {
*pkeylen = len;
}
return len;
}
/*
perform a LDAP/SASL/SPNEGO/NTLMSSP bind (just how many layers can
we fit on one socket??)
*/
static ADS_STATUS ads_sasl_spnego_ntlmssp_bind(ADS_STRUCT *ads)
{
DATA_BLOB msg1 = data_blob_null;
DATA_BLOB blob = data_blob_null;
DATA_BLOB blob_in = data_blob_null;
DATA_BLOB blob_out = data_blob_null;
struct berval cred, *scred = NULL;
int rc;
NTSTATUS nt_status;
ADS_STATUS status;
int turn = 1;
uint32 features = 0;
struct ntlmssp_state *ntlmssp_state;
nt_status = ntlmssp_client_start(NULL,
lp_netbios_name(),
lp_workgroup(),
lp_client_ntlmv2_auth(),
&ntlmssp_state);
if (!NT_STATUS_IS_OK(nt_status)) {
return ADS_ERROR_NT(nt_status);
}
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SIGN;
if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, ads->auth.user_name))) {
return ADS_ERROR_NT(nt_status);
}
if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, ads->auth.realm))) {
return ADS_ERROR_NT(nt_status);
}
if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, ads->auth.password))) {
return ADS_ERROR_NT(nt_status);
}
switch (ads->ldap.wrap_type) {
case ADS_SASLWRAP_TYPE_SEAL:
features = NTLMSSP_FEATURE_SIGN | NTLMSSP_FEATURE_SEAL;
break;
case ADS_SASLWRAP_TYPE_SIGN:
if (ads->auth.flags & ADS_AUTH_SASL_FORCE) {
features = NTLMSSP_FEATURE_SIGN;
} else {
/*
* windows servers are broken with sign only,
* so we need to use seal here too
*/
features = NTLMSSP_FEATURE_SIGN | NTLMSSP_FEATURE_SEAL;
ads->ldap.wrap_type = ADS_SASLWRAP_TYPE_SEAL;
}
break;
case ADS_SASLWRAP_TYPE_PLAIN:
break;
}
ntlmssp_want_feature(ntlmssp_state, features);
blob_in = data_blob_null;
do {
nt_status = ntlmssp_update(ntlmssp_state,
blob_in, &blob_out);
data_blob_free(&blob_in);
if ((NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)
|| NT_STATUS_IS_OK(nt_status))
&& blob_out.length) {
if (turn == 1) {
const char *OIDs_ntlm[] = {OID_NTLMSSP, NULL};
/* and wrap it in a SPNEGO wrapper */
msg1 = spnego_gen_negTokenInit(talloc_tos(),
OIDs_ntlm, &blob_out, NULL);
} else {
/* wrap it in SPNEGO */
msg1 = spnego_gen_auth(talloc_tos(), blob_out);
}
data_blob_free(&blob_out);
cred.bv_val = (char *)msg1.data;
cred.bv_len = msg1.length;
scred = NULL;
rc = ldap_sasl_bind_s(ads->ldap.ld, NULL, "GSS-SPNEGO", &cred, NULL, NULL, &scred);
data_blob_free(&msg1);
if ((rc != LDAP_SASL_BIND_IN_PROGRESS) && (rc != 0)) {
if (scred) {
ber_bvfree(scred);
}
TALLOC_FREE(ntlmssp_state);
return ADS_ERROR(rc);
}
if (scred) {
blob = data_blob(scred->bv_val, scred->bv_len);
ber_bvfree(scred);
} else {
blob = data_blob_null;
}
} else {
TALLOC_FREE(ntlmssp_state);
data_blob_free(&blob_out);
return ADS_ERROR_NT(nt_status);
}
if ((turn == 1) &&
(rc == LDAP_SASL_BIND_IN_PROGRESS)) {
DATA_BLOB tmp_blob = data_blob_null;
/* the server might give us back two challenges */
if (!spnego_parse_challenge(talloc_tos(), blob, &blob_in,
&tmp_blob)) {
TALLOC_FREE(ntlmssp_state);
data_blob_free(&blob);
DEBUG(3,("Failed to parse challenges\n"));
return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
}
data_blob_free(&tmp_blob);
} else if (rc == LDAP_SASL_BIND_IN_PROGRESS) {
if (!spnego_parse_auth_response(talloc_tos(), blob, nt_status, OID_NTLMSSP,
&blob_in)) {
TALLOC_FREE(ntlmssp_state);
data_blob_free(&blob);
DEBUG(3,("Failed to parse auth response\n"));
return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
}
}
data_blob_free(&blob);
data_blob_free(&blob_out);
turn++;
} while (rc == LDAP_SASL_BIND_IN_PROGRESS && !NT_STATUS_IS_OK(nt_status));
/* we have a reference conter on ntlmssp_state, if we are signing
then the state will be kept by the signing engine */
if (ads->ldap.wrap_type > ADS_SASLWRAP_TYPE_PLAIN) {
ads->ldap.out.max_unwrapped = ADS_SASL_WRAPPING_OUT_MAX_WRAPPED - NTLMSSP_SIG_SIZE;
ads->ldap.out.sig_size = NTLMSSP_SIG_SIZE;
ads->ldap.in.min_wrapped = ads->ldap.out.sig_size;
ads->ldap.in.max_wrapped = ADS_SASL_WRAPPING_IN_MAX_WRAPPED;
status = ads_setup_sasl_wrapping(ads, &ads_sasl_ntlmssp_ops, ntlmssp_state);
if (!ADS_ERR_OK(status)) {
DEBUG(0, ("ads_setup_sasl_wrapping() failed: %s\n",
ads_errstr(status)));
TALLOC_FREE(ntlmssp_state);
return status;
}
} else {
TALLOC_FREE(ntlmssp_state);
}
return ADS_ERROR(rc);
}
DATA_BLOB negprot_spnego(TALLOC_CTX *ctx, struct smbd_server_connection *sconn)
{
DATA_BLOB blob = data_blob_null;
DATA_BLOB blob_out = data_blob_null;
nstring dos_name;
fstring unix_name;
NTSTATUS status;
#ifdef DEVELOPER
size_t slen;
#endif
const char *OIDs_krb5[] = {OID_KERBEROS5,
OID_KERBEROS5_OLD,
OID_NTLMSSP,
NULL};
const char *OIDs_ntlm[] = {OID_NTLMSSP, NULL};
struct auth_ntlmssp_state *auth_ntlmssp_state;
sconn->use_gensec_hook = false;
/* See if we can get an SPNEGO blob out of the gensec hook (if auth_samba4 is loaded) */
status = auth_ntlmssp_prepare(sconn->remote_address,
&auth_ntlmssp_state);
if (NT_STATUS_IS_OK(status)) {
status = auth_generic_start(auth_ntlmssp_state, GENSEC_OID_SPNEGO);
if (NT_STATUS_IS_OK(status)) {
status = auth_ntlmssp_update(auth_ntlmssp_state, ctx,
data_blob_null, &blob);
/* If we get the list of OIDs, the 'OK' answer
* is NT_STATUS_MORE_PROCESSING_REQUIRED */
if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
sconn->use_gensec_hook = true;
}
}
TALLOC_FREE(auth_ntlmssp_state);
}
sconn->smb1.negprot.spnego = true;
/* strangely enough, NT does not sent the single OID NTLMSSP when
not a ADS member, it sends no OIDs at all
OLD COMMENT : "we can't do this until we teach our sesssion setup parser to know
about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)"
Our sessionsetup code now handles raw NTLMSSP connects, so we can go
back to doing what W2K3 does here. This is needed to make PocketPC 2003
CIFS connections work with SPNEGO. See bugzilla bugs #1828 and #3133
for details. JRA.
*/
if (sconn->use_gensec_hook) {
/* blob initialised above */
} else if (lp_security() != SEC_ADS && !USE_KERBEROS_KEYTAB) {
#if 0
/* Code for PocketPC client */
blob = data_blob(guid, 16);
#else
/* Code for standalone WXP client */
blob = spnego_gen_negTokenInit(ctx, OIDs_ntlm, NULL, "NONE");
#endif
} else if (!lp_send_spnego_principal()) {
/* By default, Windows 2008 and later sends not_defined_in_RFC4178@please_ignore */
blob = spnego_gen_negTokenInit(ctx, OIDs_krb5, NULL, ADS_IGNORE_PRINCIPAL);
} else {
fstring myname;
char *host_princ_s = NULL;
name_to_fqdn(myname, lp_netbios_name());
strlower_m(myname);
if (asprintf(&host_princ_s, "cifs/%s@%s", myname, lp_realm())
== -1) {
return data_blob_null;
}
blob = spnego_gen_negTokenInit(ctx, OIDs_krb5, NULL, host_princ_s);
SAFE_FREE(host_princ_s);
}
if (blob.length == 0 || blob.data == NULL) {
return data_blob_null;
}
blob_out = data_blob_talloc(ctx, NULL, 16 + blob.length);
if (blob_out.data == NULL) {
data_blob_free(&blob);
return data_blob_null;
}
memset(blob_out.data, '\0', 16);
checked_strlcpy(unix_name, lp_netbios_name(), sizeof(unix_name));
strlower_m(unix_name);
push_ascii_nstring(dos_name, unix_name);
strlcpy((char *)blob_out.data, dos_name, 17);
#ifdef DEVELOPER
/* Fix valgrind 'uninitialized bytes' issue. */
slen = strlen(dos_name);
if (slen < 16) {
memset(blob_out.data+slen, '\0', 16 - slen);
}
#endif
memcpy(&blob_out.data[16], blob.data, blob.length);
data_blob_free(&blob);
return blob_out;
}
