static bool read_negTokenTarg(struct asn1_data *asn1, TALLOC_CTX *mem_ctx,
struct spnego_negTokenTarg *token)
{
ZERO_STRUCTP(token);
asn1_start_tag(asn1, ASN1_CONTEXT(1));
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
while (!asn1->has_error && 0 < asn1_tag_remaining(asn1)) {
uint8_t context;
if (!asn1_peek_uint8(asn1, &context)) {
asn1->has_error = true;
break;
}
switch (context) {
case ASN1_CONTEXT(0):
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_start_tag(asn1, ASN1_ENUMERATED);
asn1_read_uint8(asn1, &token->negResult);
asn1_end_tag(asn1);
asn1_end_tag(asn1);
break;
case ASN1_CONTEXT(1):
asn1_start_tag(asn1, ASN1_CONTEXT(1));
asn1_read_OID(asn1, mem_ctx, &token->supportedMech);
asn1_end_tag(asn1);
break;
case ASN1_CONTEXT(2):
asn1_start_tag(asn1, ASN1_CONTEXT(2));
asn1_read_OctetString(asn1, mem_ctx, &token->responseToken);
asn1_end_tag(asn1);
break;
case ASN1_CONTEXT(3):
asn1_start_tag(asn1, ASN1_CONTEXT(3));
asn1_read_OctetString(asn1, mem_ctx, &token->mechListMIC);
asn1_end_tag(asn1);
break;
default:
asn1->has_error = true;
break;
}
}
asn1_end_tag(asn1);
asn1_end_tag(asn1);
return !asn1->has_error;
}
/*
parse a SPNEGO NTLMSSP auth packet. This contains the encrypted passwords
*/
BOOL spnego_parse_auth_response(DATA_BLOB blob, NTSTATUS nt_status,
DATA_BLOB *auth)
{
ASN1_DATA data;
uint8 negResult;
if (NT_STATUS_IS_OK(nt_status)) {
negResult = SPNEGO_NEG_RESULT_ACCEPT;
} else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
negResult = SPNEGO_NEG_RESULT_INCOMPLETE;
} else {
negResult = SPNEGO_NEG_RESULT_REJECT;
}
asn1_load(&data, blob);
asn1_start_tag(&data, ASN1_CONTEXT(1));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_CONTEXT(0));
asn1_check_enumerated(&data, negResult);
asn1_end_tag(&data);
if (negResult == SPNEGO_NEG_RESULT_INCOMPLETE) {
asn1_start_tag(&data,ASN1_CONTEXT(1));
asn1_check_OID(&data, OID_NTLMSSP);
asn1_end_tag(&data);
asn1_start_tag(&data,ASN1_CONTEXT(2));
asn1_read_OctetString(&data, auth);
asn1_end_tag(&data);
}
asn1_end_tag(&data);
asn1_end_tag(&data);
if (data.has_error) {
DEBUG(3,("spnego_parse_auth_response failed at %d\n", (int)data.ofs));
asn1_free(&data);
data_blob_free(auth);
return False;
}
asn1_free(&data);
return True;
}
/*
parse a negTokenInit packet giving a GUID, a list of supported
OIDs (the mechanisms) and a principal name string
*/
BOOL spnego_parse_negTokenInit(DATA_BLOB blob,
char *OIDs[ASN1_MAX_OIDS],
char **principal)
{
int i;
BOOL ret;
ASN1_DATA data;
asn1_load(&data, blob);
asn1_start_tag(&data,ASN1_APPLICATION(0));
asn1_check_OID(&data,OID_SPNEGO);
asn1_start_tag(&data,ASN1_CONTEXT(0));
asn1_start_tag(&data,ASN1_SEQUENCE(0));
asn1_start_tag(&data,ASN1_CONTEXT(0));
asn1_start_tag(&data,ASN1_SEQUENCE(0));
for (i=0; asn1_tag_remaining(&data) > 0 && i < ASN1_MAX_OIDS; i++) {
char *oid_str = NULL;
asn1_read_OID(&data,&oid_str);
OIDs[i] = oid_str;
}
OIDs[i] = NULL;
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_start_tag(&data, ASN1_CONTEXT(3));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_CONTEXT(0));
asn1_read_GeneralString(&data,principal);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
ret = !data.has_error;
asn1_free(&data);
return ret;
}
/*
generate a SPNEGO auth packet. This will contain the encrypted passwords
*/
DATA_BLOB spnego_gen_auth(DATA_BLOB blob)
{
ASN1_DATA data;
DATA_BLOB ret;
memset(&data, 0, sizeof(data));
asn1_push_tag(&data, ASN1_CONTEXT(1));
asn1_push_tag(&data, ASN1_SEQUENCE(0));
asn1_push_tag(&data, ASN1_CONTEXT(2));
asn1_write_OctetString(&data,blob.data,blob.length);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
ret = data_blob(data.data, data.length);
asn1_free(&data);
return ret;
}
/*
generate a minimal SPNEGO response packet. Doesn't contain much.
*/
DATA_BLOB spnego_gen_auth_response(DATA_BLOB *reply, NTSTATUS nt_status,
const char *mechOID)
{
ASN1_DATA data;
DATA_BLOB ret;
uint8 negResult;
if (NT_STATUS_IS_OK(nt_status)) {
negResult = SPNEGO_NEG_RESULT_ACCEPT;
} else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
negResult = SPNEGO_NEG_RESULT_INCOMPLETE;
} else {
negResult = SPNEGO_NEG_RESULT_REJECT;
}
ZERO_STRUCT(data);
asn1_push_tag(&data, ASN1_CONTEXT(1));
asn1_push_tag(&data, ASN1_SEQUENCE(0));
asn1_push_tag(&data, ASN1_CONTEXT(0));
asn1_write_enumerated(&data, negResult);
asn1_pop_tag(&data);
if (reply->data != NULL) {
asn1_push_tag(&data,ASN1_CONTEXT(1));
asn1_write_OID(&data, mechOID);
asn1_pop_tag(&data);
asn1_push_tag(&data,ASN1_CONTEXT(2));
asn1_write_OctetString(&data, reply->data, reply->length);
asn1_pop_tag(&data);
}
asn1_pop_tag(&data);
asn1_pop_tag(&data);
ret = data_blob(data.data, data.length);
asn1_free(&data);
return ret;
}
/*
parse a negTokenTarg packet giving a list of OIDs and a security blob
*/
BOOL parse_negTokenTarg(DATA_BLOB blob, char *OIDs[ASN1_MAX_OIDS], DATA_BLOB *secblob)
{
int i;
ASN1_DATA data;
asn1_load(&data, blob);
asn1_start_tag(&data, ASN1_APPLICATION(0));
asn1_check_OID(&data,OID_SPNEGO);
asn1_start_tag(&data, ASN1_CONTEXT(0));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_CONTEXT(0));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
for (i=0; asn1_tag_remaining(&data) > 0 && i < ASN1_MAX_OIDS; i++) {
char *oid_str = NULL;
asn1_read_OID(&data,&oid_str);
OIDs[i] = oid_str;
}
OIDs[i] = NULL;
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_start_tag(&data, ASN1_CONTEXT(2));
asn1_read_OctetString(&data,secblob);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
if (data.has_error) {
DEBUG(1,("Failed to parse negTokenTarg at offset %d\n", (int)data.ofs));
asn1_free(&data);
return False;
}
asn1_free(&data);
return True;
}
/*
generate a negTokenTarg packet given a list of OIDs and a security blob
*/
DATA_BLOB gen_negTokenTarg(const char *OIDs[], DATA_BLOB blob)
{
int i;
ASN1_DATA data;
DATA_BLOB ret;
memset(&data, 0, sizeof(data));
asn1_push_tag(&data, ASN1_APPLICATION(0));
asn1_write_OID(&data,OID_SPNEGO);
asn1_push_tag(&data, ASN1_CONTEXT(0));
asn1_push_tag(&data, ASN1_SEQUENCE(0));
asn1_push_tag(&data, ASN1_CONTEXT(0));
asn1_push_tag(&data, ASN1_SEQUENCE(0));
for (i=0; OIDs[i]; i++) {
asn1_write_OID(&data,OIDs[i]);
}
asn1_pop_tag(&data);
asn1_pop_tag(&data);
asn1_push_tag(&data, ASN1_CONTEXT(2));
asn1_write_OctetString(&data,blob.data,blob.length);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
if (data.has_error) {
DEBUG(1,("Failed to build negTokenTarg at offset %d\n", (int)data.ofs));
asn1_free(&data);
}
ret = data_blob(data.data, data.length);
asn1_free(&data);
return ret;
}
/*
parse a SPNEGO auth packet. This contains the encrypted passwords
*/
BOOL spnego_parse_auth(DATA_BLOB blob, DATA_BLOB *auth)
{
ASN1_DATA data;
asn1_load(&data, blob);
asn1_start_tag(&data, ASN1_CONTEXT(1));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_CONTEXT(2));
asn1_read_OctetString(&data,auth);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
if (data.has_error) {
DEBUG(3,("spnego_parse_auth failed at %d\n", (int)data.ofs));
asn1_free(&data);
return False;
}
asn1_free(&data);
return True;
}
/*
parse a spnego NTLMSSP challenge packet giving two security blobs
*/
BOOL spnego_parse_challenge(const DATA_BLOB blob,
DATA_BLOB *chal1, DATA_BLOB *chal2)
{
BOOL ret;
ASN1_DATA data;
ZERO_STRUCTP(chal1);
ZERO_STRUCTP(chal2);
asn1_load(&data, blob);
asn1_start_tag(&data,ASN1_CONTEXT(1));
asn1_start_tag(&data,ASN1_SEQUENCE(0));
asn1_start_tag(&data,ASN1_CONTEXT(0));
asn1_check_enumerated(&data,1);
asn1_end_tag(&data);
asn1_start_tag(&data,ASN1_CONTEXT(1));
asn1_check_OID(&data, OID_NTLMSSP);
asn1_end_tag(&data);
asn1_start_tag(&data,ASN1_CONTEXT(2));
asn1_read_OctetString(&data, chal1);
asn1_end_tag(&data);
/* the second challenge is optional (XP doesn't send it) */
if (asn1_tag_remaining(&data)) {
asn1_start_tag(&data,ASN1_CONTEXT(3));
asn1_read_OctetString(&data, chal2);
asn1_end_tag(&data);
}
asn1_end_tag(&data);
asn1_end_tag(&data);
ret = !data.has_error;
asn1_free(&data);
return ret;
}
static bool read_negTokenTarg(ASN1_DATA *asn1, negTokenTarg_t *token)
{
ZERO_STRUCTP(token);
asn1_start_tag(asn1, ASN1_CONTEXT(1));
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
while (!asn1->has_error && 0 < asn1_tag_remaining(asn1)) {
switch (asn1->data[asn1->ofs]) {
case ASN1_CONTEXT(0):
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_start_tag(asn1, ASN1_ENUMERATED);
asn1_read_uint8(asn1, &token->negResult);
asn1_end_tag(asn1);
asn1_end_tag(asn1);
break;
case ASN1_CONTEXT(1):
asn1_start_tag(asn1, ASN1_CONTEXT(1));
asn1_read_OID(asn1, &token->supportedMech);
asn1_end_tag(asn1);
break;
case ASN1_CONTEXT(2):
asn1_start_tag(asn1, ASN1_CONTEXT(2));
asn1_read_OctetString(asn1, &token->responseToken);
asn1_end_tag(asn1);
break;
case ASN1_CONTEXT(3):
asn1_start_tag(asn1, ASN1_CONTEXT(3));
asn1_read_OctetString(asn1, &token->mechListMIC);
asn1_end_tag(asn1);
break;
default:
asn1->has_error = True;
break;
}
}
asn1_end_tag(asn1);
asn1_end_tag(asn1);
return !asn1->has_error;
}
BOOL unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
{
DATA_BLOB pac_contents;
ASN1_DATA data;
int data_type;
if (!auth_data->length) {
return False;
}
asn1_load(&data, *auth_data);
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_CONTEXT(0));
asn1_read_Integer(&data, &data_type);
if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
asn1_free(&data);
return False;
}
asn1_end_tag(&data);
asn1_start_tag(&data, ASN1_CONTEXT(1));
asn1_read_OctetString(&data, &pac_contents);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_free(&data);
*unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
data_blob_free(&pac_contents);
return True;
}
static bool write_negTokenTarg(struct asn1_data *asn1, struct spnego_negTokenTarg *token)
{
asn1_push_tag(asn1, ASN1_CONTEXT(1));
asn1_push_tag(asn1, ASN1_SEQUENCE(0));
if (token->negResult != SPNEGO_NONE_RESULT) {
asn1_push_tag(asn1, ASN1_CONTEXT(0));
asn1_write_enumerated(asn1, token->negResult);
asn1_pop_tag(asn1);
}
if (token->supportedMech) {
asn1_push_tag(asn1, ASN1_CONTEXT(1));
asn1_write_OID(asn1, token->supportedMech);
asn1_pop_tag(asn1);
}
if (token->responseToken.data) {
asn1_push_tag(asn1, ASN1_CONTEXT(2));
asn1_write_OctetString(asn1, token->responseToken.data,
token->responseToken.length);
asn1_pop_tag(asn1);
}
if (token->mechListMIC.data) {
asn1_push_tag(asn1, ASN1_CONTEXT(3));
asn1_write_OctetString(asn1, token->mechListMIC.data,
token->mechListMIC.length);
asn1_pop_tag(asn1);
}
asn1_pop_tag(asn1);
asn1_pop_tag(asn1);
return !asn1->has_error;
}
/*
generate a SPNEGO auth packet. This will contain the encrypted passwords
*/
DATA_BLOB spnego_gen_auth(TALLOC_CTX *ctx, DATA_BLOB blob)
{
ASN1_DATA *data;
DATA_BLOB ret;
data = asn1_init(talloc_tos());
if (data == NULL) {
return data_blob_null;
}
asn1_push_tag(data, ASN1_CONTEXT(1));
asn1_push_tag(data, ASN1_SEQUENCE(0));
asn1_push_tag(data, ASN1_CONTEXT(2));
asn1_write_OctetString(data,blob.data,blob.length);
asn1_pop_tag(data);
asn1_pop_tag(data);
asn1_pop_tag(data);
ret = data_blob_talloc(ctx, data->data, data->length);
asn1_free(data);
return ret;
}
ssize_t spnego_read_data(TALLOC_CTX *mem_ctx, DATA_BLOB data, struct spnego_data *token)
{
struct asn1_data *asn1;
ssize_t ret = -1;
uint8_t context;
ZERO_STRUCTP(token);
if (data.length == 0) {
return ret;
}
asn1 = asn1_init(mem_ctx);
if (asn1 == NULL) {
return -1;
}
asn1_load(asn1, data);
if (!asn1_peek_uint8(asn1, &context)) {
asn1->has_error = true;
} else {
switch (context) {
case ASN1_APPLICATION(0):
asn1_start_tag(asn1, ASN1_APPLICATION(0));
asn1_check_OID(asn1, GENSEC_OID_SPNEGO);
if (read_negTokenInit(asn1, mem_ctx, &token->negTokenInit)) {
token->type = SPNEGO_NEG_TOKEN_INIT;
}
asn1_end_tag(asn1);
break;
case ASN1_CONTEXT(1):
if (read_negTokenTarg(asn1, mem_ctx, &token->negTokenTarg)) {
token->type = SPNEGO_NEG_TOKEN_TARG;
}
break;
default:
asn1->has_error = true;
break;
}
}
if (!asn1->has_error) ret = asn1->ofs;
asn1_free(asn1);
return ret;
}
DATA_BLOB spnego_gen_negTokenInit(TALLOC_CTX *ctx,
const char *OIDs[],
DATA_BLOB *psecblob,
const char *principal)
{
int i;
ASN1_DATA *data;
DATA_BLOB ret = data_blob_null;
data = asn1_init(talloc_tos());
if (data == NULL) {
return data_blob_null;
}
if (!asn1_push_tag(data,ASN1_APPLICATION(0))) goto err;
if (!asn1_write_OID(data,OID_SPNEGO)) goto err;
if (!asn1_push_tag(data,ASN1_CONTEXT(0))) goto err;
if (!asn1_push_tag(data,ASN1_SEQUENCE(0))) goto err;
if (!asn1_push_tag(data,ASN1_CONTEXT(0))) goto err;
if (!asn1_push_tag(data,ASN1_SEQUENCE(0))) goto err;
for (i=0; OIDs[i]; i++) {
if (!asn1_write_OID(data,OIDs[i])) goto err;
}
if (!asn1_pop_tag(data)) goto err;
if (!asn1_pop_tag(data)) goto err;
if (psecblob && psecblob->length && psecblob->data) {
if (!asn1_push_tag(data, ASN1_CONTEXT(2))) goto err;
if (!asn1_write_OctetString(data,psecblob->data,
psecblob->length)) goto err;
if (!asn1_pop_tag(data)) goto err;
}
if (principal) {
if (!asn1_push_tag(data, ASN1_CONTEXT(3))) goto err;
if (!asn1_push_tag(data, ASN1_SEQUENCE(0))) goto err;
if (!asn1_push_tag(data, ASN1_CONTEXT(0))) goto err;
if (!asn1_write_GeneralString(data,principal)) goto err;
if (!asn1_pop_tag(data)) goto err;
if (!asn1_pop_tag(data)) goto err;
if (!asn1_pop_tag(data)) goto err;
}
if (!asn1_pop_tag(data)) goto err;
if (!asn1_pop_tag(data)) goto err;
if (!asn1_pop_tag(data)) goto err;
if (!asn1_extract_blob(data, ctx, &ret)) {
goto err;
}
err:
if (asn1_has_error(data)) {
DEBUG(1, ("Failed to build negTokenInit at offset %d\n",
(int)asn1_current_ofs(data)));
}
asn1_free(data);
return ret;
}
static int reply_sesssetup_and_X_spnego(connection_struct *conn, char *inbuf,
char *outbuf,
int length,int bufsize)
{
uint8 *p;
DATA_BLOB blob1;
int ret;
size_t bufrem;
fstring native_os, native_lanman, primary_domain;
char *p2;
uint16 data_blob_len = SVAL(inbuf, smb_vwv7);
enum remote_arch_types ra_type = get_remote_arch();
int vuid = SVAL(inbuf,smb_uid);
user_struct *vuser = NULL;
NTSTATUS status = NT_STATUS_OK;
uint16 smbpid = SVAL(inbuf,smb_pid);
DEBUG(3,("Doing spnego session setup\n"));
if (global_client_caps == 0) {
global_client_caps = IVAL(inbuf,smb_vwv10);
if (!(global_client_caps & CAP_STATUS32)) {
remove_from_common_flags2(FLAGS2_32_BIT_ERROR_CODES);
}
}
p = (uint8 *)smb_buf(inbuf);
if (data_blob_len == 0) {
/* an invalid request */
return ERROR_NT(nt_status_squash(NT_STATUS_LOGON_FAILURE));
}
bufrem = smb_bufrem(inbuf, p);
/* pull the spnego blob */
blob1 = data_blob(p, MIN(bufrem, data_blob_len));
#if 0
file_save("negotiate.dat", blob1.data, blob1.length);
#endif
p2 = inbuf + smb_vwv13 + data_blob_len;
p2 += srvstr_pull_buf(inbuf, native_os, p2, sizeof(native_os), STR_TERMINATE);
p2 += srvstr_pull_buf(inbuf, native_lanman, p2, sizeof(native_lanman), STR_TERMINATE);
p2 += srvstr_pull_buf(inbuf, primary_domain, p2, sizeof(primary_domain), STR_TERMINATE);
DEBUG(3,("NativeOS=[%s] NativeLanMan=[%s] PrimaryDomain=[%s]\n",
native_os, native_lanman, primary_domain));
if ( ra_type == RA_WIN2K ) {
/* Vista sets neither the OS or lanman strings */
if ( !strlen(native_os) && !strlen(native_lanman) )
set_remote_arch(RA_VISTA);
/* Windows 2003 doesn't set the native lanman string,
but does set primary domain which is a bug I think */
if ( !strlen(native_lanman) ) {
ra_lanman_string( primary_domain );
} else {
ra_lanman_string( native_lanman );
}
}
vuser = get_partial_auth_user_struct(vuid);
if (!vuser) {
struct pending_auth_data *pad = get_pending_auth_data(smbpid);
if (pad) {
DEBUG(10,("reply_sesssetup_and_X_spnego: found pending vuid %u\n",
(unsigned int)pad->vuid ));
vuid = pad->vuid;
vuser = get_partial_auth_user_struct(vuid);
}
}
if (!vuser) {
vuid = register_vuid(NULL, data_blob(NULL, 0), data_blob(NULL, 0), NULL);
if (vuid == UID_FIELD_INVALID ) {
data_blob_free(&blob1);
return ERROR_NT(nt_status_squash(NT_STATUS_INVALID_PARAMETER));
}
vuser = get_partial_auth_user_struct(vuid);
}
if (!vuser) {
data_blob_free(&blob1);
return ERROR_NT(nt_status_squash(NT_STATUS_INVALID_PARAMETER));
}
SSVAL(outbuf,smb_uid,vuid);
/* Large (greater than 4k) SPNEGO blobs are split into multiple
* sessionsetup requests as the Windows limit on the security blob
* field is 4k. Bug #4400. JRA.
*/
status = check_spnego_blob_complete(smbpid, vuid, &blob1);
if (!NT_STATUS_IS_OK(status)) {
if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
/* Real error - kill the intermediate vuid */
invalidate_vuid(vuid);
}
data_blob_free(&blob1);
return ERROR_NT(nt_status_squash(status));
}
if (blob1.data[0] == ASN1_APPLICATION(0)) {
/* its a negTokenTarg packet */
ret = reply_spnego_negotiate(conn, inbuf, outbuf, vuid, length, bufsize, blob1,
&vuser->auth_ntlmssp_state);
data_blob_free(&blob1);
return ret;
}
if (blob1.data[0] == ASN1_CONTEXT(1)) {
/* its a auth packet */
ret = reply_spnego_auth(conn, inbuf, outbuf, vuid, length, bufsize, blob1,
&vuser->auth_ntlmssp_state);
data_blob_free(&blob1);
return ret;
}
if (strncmp((char *)(blob1.data), "NTLMSSP", 7) == 0) {
DATA_BLOB chal;
if (!vuser->auth_ntlmssp_state) {
status = auth_ntlmssp_start(&vuser->auth_ntlmssp_state);
if (!NT_STATUS_IS_OK(status)) {
/* Kill the intermediate vuid */
invalidate_vuid(vuid);
data_blob_free(&blob1);
return ERROR_NT(nt_status_squash(status));
}
}
status = auth_ntlmssp_update(vuser->auth_ntlmssp_state,
blob1, &chal);
data_blob_free(&blob1);
reply_spnego_ntlmssp(conn, inbuf, outbuf, vuid,
&vuser->auth_ntlmssp_state,
&chal, status, False);
data_blob_free(&chal);
return -1;
}
/* what sort of packet is this? */
DEBUG(1,("Unknown packet in reply_sesssetup_and_X_spnego\n"));
data_blob_free(&blob1);
return ERROR_NT(nt_status_squash(NT_STATUS_LOGON_FAILURE));
}
static bool write_negTokenInit(struct asn1_data *asn1, struct spnego_negTokenInit *token)
{
asn1_push_tag(asn1, ASN1_CONTEXT(0));
asn1_push_tag(asn1, ASN1_SEQUENCE(0));
/* Write mechTypes */
if (token->mechTypes && *token->mechTypes) {
int i;
asn1_push_tag(asn1, ASN1_CONTEXT(0));
asn1_push_tag(asn1, ASN1_SEQUENCE(0));
for (i = 0; token->mechTypes[i]; i++) {
asn1_write_OID(asn1, token->mechTypes[i]);
}
asn1_pop_tag(asn1);
asn1_pop_tag(asn1);
}
/* write reqFlags */
if (token->reqFlags & SPNEGO_REQ_FLAG) {
int flags = token->reqFlags & ~SPNEGO_REQ_FLAG;
asn1_push_tag(asn1, ASN1_CONTEXT(1));
asn1_write_Integer(asn1, flags);
asn1_pop_tag(asn1);
}
/* write mechToken */
if (token->mechToken.data) {
asn1_push_tag(asn1, ASN1_CONTEXT(2));
asn1_write_OctetString(asn1, token->mechToken.data,
token->mechToken.length);
asn1_pop_tag(asn1);
}
/* write mechListMIC */
if (token->mechListMIC.data) {
asn1_push_tag(asn1, ASN1_CONTEXT(3));
#if 0
/* This is what RFC 2478 says ... */
asn1_write_OctetString(asn1, token->mechListMIC.data,
token->mechListMIC.length);
#else
/* ... but unfortunately this is what Windows
sends/expects */
asn1_push_tag(asn1, ASN1_SEQUENCE(0));
asn1_push_tag(asn1, ASN1_CONTEXT(0));
asn1_push_tag(asn1, ASN1_GENERAL_STRING);
asn1_write(asn1, token->mechListMIC.data,
token->mechListMIC.length);
asn1_pop_tag(asn1);
asn1_pop_tag(asn1);
asn1_pop_tag(asn1);
#endif
asn1_pop_tag(asn1);
}
asn1_pop_tag(asn1);
asn1_pop_tag(asn1);
return !asn1->has_error;
}
/*
do a cldap netlogon query
*/
static int send_cldap_netlogon(int sock, const char *domain,
const char *hostname, unsigned ntversion)
{
ASN1_DATA data;
char ntver[4];
#ifdef CLDAP_USER_QUERY
char aac[4];
SIVAL(aac, 0, 0x00000180);
#endif
SIVAL(ntver, 0, ntversion);
memset(&data, 0, sizeof(data));
asn1_push_tag(&data,ASN1_SEQUENCE(0));
asn1_write_Integer(&data, 4);
asn1_push_tag(&data, ASN1_APPLICATION(3));
asn1_write_OctetString(&data, NULL, 0);
asn1_write_enumerated(&data, 0);
asn1_write_enumerated(&data, 0);
asn1_write_Integer(&data, 0);
asn1_write_Integer(&data, 0);
asn1_write_BOOLEAN2(&data, False);
asn1_push_tag(&data, ASN1_CONTEXT(0));
if (domain) {
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "DnsDomain", 9);
asn1_write_OctetString(&data, domain, strlen(domain));
asn1_pop_tag(&data);
}
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "Host", 4);
asn1_write_OctetString(&data, hostname, strlen(hostname));
asn1_pop_tag(&data);
#ifdef CLDAP_USER_QUERY
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "User", 4);
asn1_write_OctetString(&data, "SAMBA$", 6);
asn1_pop_tag(&data);
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "AAC", 4);
asn1_write_OctetString(&data, aac, 4);
asn1_pop_tag(&data);
#endif
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "NtVer", 5);
asn1_write_OctetString(&data, ntver, 4);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
asn1_push_tag(&data,ASN1_SEQUENCE(0));
asn1_write_OctetString(&data, "NetLogon", 8);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
if (data.has_error) {
DEBUG(2,("Failed to build cldap netlogon at offset %d\n", (int)data.ofs));
asn1_free(&data);
return -1;
}
if (write(sock, data.data, data.length) != (ssize_t)data.length) {
DEBUG(2,("failed to send cldap query (%s)\n", strerror(errno)));
asn1_free(&data);
return -1;
}
asn1_free(&data);
return 0;
}
/*
parse a negTokenInit packet giving a GUID, a list of supported
OIDs (the mechanisms) and a principal name string
*/
bool spnego_parse_negTokenInit(TALLOC_CTX *ctx,
DATA_BLOB blob,
char *OIDs[ASN1_MAX_OIDS],
char **principal,
DATA_BLOB *secblob)
{
int i;
bool ret;
ASN1_DATA *data;
data = asn1_init(talloc_tos());
if (data == NULL) {
return false;
}
asn1_load(data, blob);
asn1_start_tag(data,ASN1_APPLICATION(0));
asn1_check_OID(data,OID_SPNEGO);
/* negTokenInit [0] NegTokenInit */
asn1_start_tag(data,ASN1_CONTEXT(0));
asn1_start_tag(data,ASN1_SEQUENCE(0));
/* mechTypes [0] MechTypeList OPTIONAL */
/* Not really optional, we depend on this to decide
* what mechanisms we have to work with. */
asn1_start_tag(data,ASN1_CONTEXT(0));
asn1_start_tag(data,ASN1_SEQUENCE(0));
for (i=0; asn1_tag_remaining(data) > 0 && i < ASN1_MAX_OIDS-1; i++) {
asn1_read_OID(data,ctx, &OIDs[i]);
if (data->has_error) {
break;
}
}
OIDs[i] = NULL;
asn1_end_tag(data);
asn1_end_tag(data);
if (principal) {
*principal = NULL;
}
if (secblob) {
*secblob = data_blob_null;
}
/*
Win7 + Live Sign-in Assistant attaches a mechToken
ASN1_CONTEXT(2) to the negTokenInit packet
which breaks our negotiation if we just assume
the next tag is ASN1_CONTEXT(3).
*/
if (asn1_peek_tag(data, ASN1_CONTEXT(1))) {
uint8 flags;
/* reqFlags [1] ContextFlags OPTIONAL */
asn1_start_tag(data, ASN1_CONTEXT(1));
asn1_start_tag(data, ASN1_BIT_STRING);
while (asn1_tag_remaining(data) > 0) {
asn1_read_uint8(data, &flags);
}
asn1_end_tag(data);
asn1_end_tag(data);
}
if (asn1_peek_tag(data, ASN1_CONTEXT(2))) {
DATA_BLOB sblob = data_blob_null;
/* mechToken [2] OCTET STRING OPTIONAL */
asn1_start_tag(data, ASN1_CONTEXT(2));
asn1_read_OctetString(data, ctx, &sblob);
asn1_end_tag(data);
if (secblob) {
*secblob = sblob;
} else {
data_blob_free(&sblob);
}
}
if (asn1_peek_tag(data, ASN1_CONTEXT(3))) {
char *princ = NULL;
/* mechListMIC [3] OCTET STRING OPTIONAL */
asn1_start_tag(data, ASN1_CONTEXT(3));
asn1_start_tag(data, ASN1_SEQUENCE(0));
asn1_start_tag(data, ASN1_CONTEXT(0));
asn1_read_GeneralString(data, ctx, &princ);
asn1_end_tag(data);
asn1_end_tag(data);
asn1_end_tag(data);
if (principal) {
*principal = princ;
} else {
TALLOC_FREE(princ);
}
}
asn1_end_tag(data);
asn1_end_tag(data);
asn1_end_tag(data);
ret = !data->has_error;
if (data->has_error) {
int j;
if (principal) {
TALLOC_FREE(*principal);
}
if (secblob) {
data_blob_free(secblob);
}
for(j = 0; j < i && j < ASN1_MAX_OIDS-1; j++) {
TALLOC_FREE(OIDs[j]);
}
}
asn1_free(data);
return ret;
}
/*
parse a SPNEGO auth packet. This contains the encrypted passwords
*/
bool spnego_parse_auth_response(TALLOC_CTX *ctx,
DATA_BLOB blob, NTSTATUS nt_status,
const char *mechOID,
DATA_BLOB *auth)
{
ASN1_DATA *data;
uint8 negResult;
if (NT_STATUS_IS_OK(nt_status)) {
negResult = SPNEGO_ACCEPT_COMPLETED;
} else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
negResult = SPNEGO_ACCEPT_INCOMPLETE;
} else {
negResult = SPNEGO_REJECT;
}
data = asn1_init(talloc_tos());
if (data == NULL) {
return false;
}
asn1_load(data, blob);
asn1_start_tag(data, ASN1_CONTEXT(1));
asn1_start_tag(data, ASN1_SEQUENCE(0));
asn1_start_tag(data, ASN1_CONTEXT(0));
asn1_check_enumerated(data, negResult);
asn1_end_tag(data);
*auth = data_blob_null;
if (asn1_tag_remaining(data)) {
asn1_start_tag(data,ASN1_CONTEXT(1));
asn1_check_OID(data, mechOID);
asn1_end_tag(data);
if (asn1_tag_remaining(data)) {
asn1_start_tag(data,ASN1_CONTEXT(2));
asn1_read_OctetString(data, ctx, auth);
asn1_end_tag(data);
}
} else if (negResult == SPNEGO_ACCEPT_INCOMPLETE) {
data->has_error = 1;
}
/* Binding against Win2K DC returns a duplicate of the responseToken in
* the optional mechListMIC field. This is a bug in Win2K. We ignore
* this field if it exists. Win2K8 may return a proper mechListMIC at
* which point we need to implement the integrity checking. */
if (asn1_tag_remaining(data)) {
DATA_BLOB mechList = data_blob_null;
asn1_start_tag(data, ASN1_CONTEXT(3));
asn1_read_OctetString(data, ctx, &mechList);
asn1_end_tag(data);
data_blob_free(&mechList);
DEBUG(5,("spnego_parse_auth_response received mechListMIC, "
"ignoring.\n"));
}
asn1_end_tag(data);
asn1_end_tag(data);
if (data->has_error) {
DEBUG(3,("spnego_parse_auth_response failed at %d\n", (int)data->ofs));
asn1_free(data);
data_blob_free(auth);
return False;
}
asn1_free(data);
return True;
}
/* This implements kerberos password change protocol as specified in
* kerb-chg-password-02.txt and kerberos-set-passwd-02.txt
* as well as microsoft version of the protocol
* as specified in kerberos-set-passwd-00.txt
*/
static DATA_BLOB encode_krb5_setpw(const char *principal, const char *password)
{
char* princ_part1 = NULL;
char* princ_part2 = NULL;
char* realm = NULL;
char* c;
char* princ;
ASN1_DATA *req;
DATA_BLOB ret;
princ = SMB_STRDUP(principal);
if ((c = strchr_m(princ, '/')) == NULL) {
c = princ;
} else {
*c = '\0';
c++;
princ_part1 = princ;
}
princ_part2 = c;
if ((c = strchr_m(c, '@')) != NULL) {
*c = '\0';
c++;
realm = c;
} else {
/* We must have a realm component. */
return data_blob_null;
}
req = asn1_init(talloc_tos());
if (req == NULL) {
return data_blob_null;
}
asn1_push_tag(req, ASN1_SEQUENCE(0));
asn1_push_tag(req, ASN1_CONTEXT(0));
asn1_write_OctetString(req, password, strlen(password));
asn1_pop_tag(req);
asn1_push_tag(req, ASN1_CONTEXT(1));
asn1_push_tag(req, ASN1_SEQUENCE(0));
asn1_push_tag(req, ASN1_CONTEXT(0));
asn1_write_Integer(req, 1);
asn1_pop_tag(req);
asn1_push_tag(req, ASN1_CONTEXT(1));
asn1_push_tag(req, ASN1_SEQUENCE(0));
if (princ_part1) {
asn1_write_GeneralString(req, princ_part1);
}
asn1_write_GeneralString(req, princ_part2);
asn1_pop_tag(req);
asn1_pop_tag(req);
asn1_pop_tag(req);
asn1_pop_tag(req);
asn1_push_tag(req, ASN1_CONTEXT(2));
asn1_write_GeneralString(req, realm);
asn1_pop_tag(req);
asn1_pop_tag(req);
ret = data_blob(req->data, req->length);
asn1_free(req);
free(princ);
return ret;
}
static bool read_negTokenInit(struct asn1_data *asn1, TALLOC_CTX *mem_ctx,
struct spnego_negTokenInit *token)
{
ZERO_STRUCTP(token);
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
while (!asn1->has_error && 0 < asn1_tag_remaining(asn1)) {
int i;
uint8_t context;
if (!asn1_peek_uint8(asn1, &context)) {
asn1->has_error = true;
break;
}
switch (context) {
/* Read mechTypes */
case ASN1_CONTEXT(0): {
const char **mechTypes;
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
mechTypes = talloc(mem_ctx, const char *);
if (mechTypes == NULL) {
asn1->has_error = true;
return false;
}
for (i = 0; !asn1->has_error &&
0 < asn1_tag_remaining(asn1); i++) {
char *oid;
const char **p;
p = talloc_realloc(mem_ctx,
mechTypes,
const char *, i+2);
if (p == NULL) {
talloc_free(mechTypes);
asn1->has_error = true;
return false;
}
mechTypes = p;
asn1_read_OID(asn1, mechTypes, &oid);
mechTypes[i] = oid;
}
mechTypes[i] = NULL;
token->mechTypes = mechTypes;
asn1_end_tag(asn1);
asn1_end_tag(asn1);
break;
}
/* Read reqFlags */
case ASN1_CONTEXT(1):
asn1_start_tag(asn1, ASN1_CONTEXT(1));
asn1_read_BitString(asn1, mem_ctx, &token->reqFlags,
&token->reqFlagsPadding);
asn1_end_tag(asn1);
break;
/* Read mechToken */
case ASN1_CONTEXT(2):
asn1_start_tag(asn1, ASN1_CONTEXT(2));
asn1_read_OctetString(asn1, mem_ctx, &token->mechToken);
asn1_end_tag(asn1);
break;
/* Read mecListMIC */
case ASN1_CONTEXT(3):
{
uint8_t type_peek;
asn1_start_tag(asn1, ASN1_CONTEXT(3));
if (!asn1_peek_uint8(asn1, &type_peek)) {
asn1->has_error = true;
break;
}
if (type_peek == ASN1_OCTET_STRING) {
asn1_read_OctetString(asn1, mem_ctx,
&token->mechListMIC);
} else {
/* RFC 2478 says we have an Octet String here,
but W2k sends something different... */
char *mechListMIC;
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_read_GeneralString(asn1, mem_ctx, &mechListMIC);
asn1_end_tag(asn1);
asn1_end_tag(asn1);
token->targetPrincipal = mechListMIC;
}
asn1_end_tag(asn1);
break;
}
default:
asn1->has_error = true;
break;
}
}
asn1_end_tag(asn1);
asn1_end_tag(asn1);
return !asn1->has_error;
}
static bool read_negTokenInit(ASN1_DATA *asn1, negTokenInit_t *token)
{
ZERO_STRUCTP(token);
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
while (!asn1->has_error && 0 < asn1_tag_remaining(asn1)) {
int i;
switch (asn1->data[asn1->ofs]) {
/* Read mechTypes */
case ASN1_CONTEXT(0):
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
token->mechTypes = SMB_MALLOC_P(const char *);
for (i = 0; !asn1->has_error &&
0 < asn1_tag_remaining(asn1); i++) {
char *p_oid = NULL;
token->mechTypes =
SMB_REALLOC_ARRAY(token->mechTypes, const char *, i + 2);
if (!token->mechTypes) {
asn1->has_error = True;
return False;
}
asn1_read_OID(asn1, &p_oid);
token->mechTypes[i] = p_oid;
}
token->mechTypes[i] = NULL;
asn1_end_tag(asn1);
asn1_end_tag(asn1);
break;
/* Read reqFlags */
case ASN1_CONTEXT(1):
asn1_start_tag(asn1, ASN1_CONTEXT(1));
asn1_read_Integer(asn1, &token->reqFlags);
token->reqFlags |= SPNEGO_REQ_FLAG;
asn1_end_tag(asn1);
break;
/* Read mechToken */
case ASN1_CONTEXT(2):
asn1_start_tag(asn1, ASN1_CONTEXT(2));
asn1_read_OctetString(asn1, &token->mechToken);
asn1_end_tag(asn1);
break;
/* Read mecListMIC */
case ASN1_CONTEXT(3):
asn1_start_tag(asn1, ASN1_CONTEXT(3));
if (asn1->data[asn1->ofs] == ASN1_OCTET_STRING) {
asn1_read_OctetString(asn1,
&token->mechListMIC);
} else {
/* RFC 2478 says we have an Octet String here,
but W2k sends something different... */
char *mechListMIC;
asn1_push_tag(asn1, ASN1_SEQUENCE(0));
asn1_push_tag(asn1, ASN1_CONTEXT(0));
asn1_read_GeneralString(asn1, &mechListMIC);
asn1_pop_tag(asn1);
asn1_pop_tag(asn1);
token->mechListMIC =
data_blob(mechListMIC, strlen(mechListMIC));
SAFE_FREE(mechListMIC);
}
asn1_end_tag(asn1);
break;
default:
asn1->has_error = True;
break;
}
}
asn1_end_tag(asn1);
asn1_end_tag(asn1);
return !asn1->has_error;
}
static NTSTATUS check_spnego_blob_complete(uint16 smbpid, uint16 vuid, DATA_BLOB *pblob)
{
struct pending_auth_data *pad = NULL;
ASN1_DATA data;
size_t needed_len = 0;
pad = get_pending_auth_data(smbpid);
/* Ensure we have some data. */
if (pblob->length == 0) {
/* Caller can cope. */
DEBUG(2,("check_spnego_blob_complete: zero blob length !\n"));
delete_partial_auth(pad);
return NT_STATUS_OK;
}
/* Were we waiting for more data ? */
if (pad) {
DATA_BLOB tmp_blob;
size_t copy_len = MIN(65536, pblob->length);
/* Integer wrap paranoia.... */
if (pad->partial_data.length + copy_len < pad->partial_data.length ||
pad->partial_data.length + copy_len < copy_len) {
DEBUG(2,("check_spnego_blob_complete: integer wrap "
"pad->partial_data.length = %u, "
"copy_len = %u\n",
(unsigned int)pad->partial_data.length,
(unsigned int)copy_len ));
delete_partial_auth(pad);
return NT_STATUS_INVALID_PARAMETER;
}
DEBUG(10,("check_spnego_blob_complete: "
"pad->partial_data.length = %u, "
"pad->needed_len = %u, "
"copy_len = %u, "
"pblob->length = %u,\n",
(unsigned int)pad->partial_data.length,
(unsigned int)pad->needed_len,
(unsigned int)copy_len,
(unsigned int)pblob->length ));
tmp_blob = data_blob(NULL,
pad->partial_data.length + copy_len);
/* Concatenate the two (up to copy_len) bytes. */
memcpy(tmp_blob.data,
pad->partial_data.data,
pad->partial_data.length);
memcpy(tmp_blob.data + pad->partial_data.length,
pblob->data,
copy_len);
/* Replace the partial data. */
data_blob_free(&pad->partial_data);
pad->partial_data = tmp_blob;
ZERO_STRUCT(tmp_blob);
/* Are we done ? */
if (pblob->length >= pad->needed_len) {
/* Yes, replace pblob. */
data_blob_free(pblob);
*pblob = pad->partial_data;
ZERO_STRUCT(pad->partial_data);
delete_partial_auth(pad);
return NT_STATUS_OK;
}
/* Still need more data. */
pad->needed_len -= copy_len;
return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
if ((pblob->data[0] != ASN1_APPLICATION(0)) &&
(pblob->data[0] != ASN1_CONTEXT(1))) {
/* Not something we can determine the
* length of.
*/
return NT_STATUS_OK;
}
/* This is a new SPNEGO sessionsetup - see if
* the data given in this blob is enough.
*/
asn1_load(&data, *pblob);
asn1_start_tag(&data, pblob->data[0]);
if (data.has_error || data.nesting == NULL) {
asn1_free(&data);
/* Let caller catch. */
return NT_STATUS_OK;
}
/* Integer wrap paranoia.... */
if (data.nesting->taglen + data.nesting->start < data.nesting->taglen ||
data.nesting->taglen + data.nesting->start < data.nesting->start) {
DEBUG(2,("check_spnego_blob_complete: integer wrap "
"data.nesting->taglen = %u, "
"data.nesting->start = %u\n",
(unsigned int)data.nesting->taglen,
(unsigned int)data.nesting->start ));
asn1_free(&data);
return NT_STATUS_INVALID_PARAMETER;
}
/* Total length of the needed asn1 is the tag length
* plus the current offset. */
needed_len = data.nesting->taglen + data.nesting->start;
asn1_free(&data);
DEBUG(10,("check_spnego_blob_complete: needed_len = %u, "
"pblob->length = %u\n",
(unsigned int)needed_len,
(unsigned int)pblob->length ));
if (needed_len <= pblob->length) {
/* Nothing to do - blob is complete. */
return NT_STATUS_OK;
}
/* Refuse the blob if it's bigger than 64k. */
if (needed_len > 65536) {
DEBUG(2,("check_spnego_blob_complete: needed_len too large (%u)\n",
(unsigned int)needed_len ));
return NT_STATUS_INVALID_PARAMETER;
}
/* We must store this blob until complete. */
pad = SMB_MALLOC(sizeof(struct pending_auth_data));
if (!pad) {
return NT_STATUS_NO_MEMORY;
}
pad->needed_len = needed_len - pblob->length;
pad->partial_data = data_blob(pblob->data, pblob->length);
if (pad->partial_data.data == NULL) {
SAFE_FREE(pad);
return NT_STATUS_NO_MEMORY;
}
pad->smbpid = smbpid;
pad->vuid = vuid;
DLIST_ADD(pd_list, pad);
return NT_STATUS_MORE_PROCESSING_REQUIRED;
}
static int reply_sesssetup_and_X_spnego(connection_struct *conn, char *inbuf,
char *outbuf,
int length,int bufsize)
{
uint8 *p;
DATA_BLOB blob1;
int ret;
size_t bufrem;
fstring native_os, native_lanman, primary_domain;
char *p2;
uint16 data_blob_len = SVAL(inbuf, smb_vwv7);
enum remote_arch_types ra_type = get_remote_arch();
DEBUG(3,("Doing spnego session setup\n"));
if (global_client_caps == 0) {
global_client_caps = IVAL(inbuf,smb_vwv10);
if (!(global_client_caps & CAP_STATUS32)) {
remove_from_common_flags2(FLAGS2_32_BIT_ERROR_CODES);
}
}
p = (uint8 *)smb_buf(inbuf);
if (data_blob_len == 0) {
/* an invalid request */
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
bufrem = smb_bufrem(inbuf, p);
/* pull the spnego blob */
blob1 = data_blob(p, MIN(bufrem, data_blob_len));
#if 0
file_save("negotiate.dat", blob1.data, blob1.length);
#endif
p2 = inbuf + smb_vwv13 + data_blob_len;
p2 += srvstr_pull_buf(inbuf, native_os, p2, sizeof(native_os), STR_TERMINATE);
p2 += srvstr_pull_buf(inbuf, native_lanman, p2, sizeof(native_lanman), STR_TERMINATE);
p2 += srvstr_pull_buf(inbuf, primary_domain, p2, sizeof(primary_domain), STR_TERMINATE);
DEBUG(3,("NativeOS=[%s] NativeLanMan=[%s] PrimaryDomain=[%s]\n",
native_os, native_lanman, primary_domain));
if ( ra_type == RA_WIN2K ) {
/* Windows 2003 doesn't set the native lanman string,
but does set primary domain which is a bug I think */
if ( !strlen(native_lanman) )
ra_lanman_string( primary_domain );
else
ra_lanman_string( native_lanman );
}
if (blob1.data[0] == ASN1_APPLICATION(0)) {
/* its a negTokenTarg packet */
ret = reply_spnego_negotiate(conn, inbuf, outbuf, length, bufsize, blob1);
data_blob_free(&blob1);
return ret;
}
if (blob1.data[0] == ASN1_CONTEXT(1)) {
/* its a auth packet */
ret = reply_spnego_auth(conn, inbuf, outbuf, length, bufsize, blob1);
data_blob_free(&blob1);
return ret;
}
/* what sort of packet is this? */
DEBUG(1,("Unknown packet in reply_sesssetup_and_X_spnego\n"));
data_blob_free(&blob1);
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
static bool read_negTokenInit(struct asn1_data *asn1, TALLOC_CTX *mem_ctx,
struct spnego_negTokenInit *token)
{
ZERO_STRUCTP(token);
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
while (!asn1->has_error && 0 < asn1_tag_remaining(asn1)) {
int i;
uint8_t context;
if (!asn1_peek_uint8(asn1, &context)) {
asn1->has_error = true;
break;
}
switch (context) {
/* Read mechTypes */
case ASN1_CONTEXT(0):
asn1_start_tag(asn1, ASN1_CONTEXT(0));
asn1_start_tag(asn1, ASN1_SEQUENCE(0));
token->mechTypes = talloc(NULL, const char *);
for (i = 0; !asn1->has_error &&
0 < asn1_tag_remaining(asn1); i++) {
token->mechTypes = talloc_realloc(NULL,
token->mechTypes,
const char *, i+2);
asn1_read_OID(asn1, token->mechTypes, token->mechTypes + i);
}
token->mechTypes[i] = NULL;
asn1_end_tag(asn1);
asn1_end_tag(asn1);
break;
/* Read reqFlags */
case ASN1_CONTEXT(1):
asn1_start_tag(asn1, ASN1_CONTEXT(1));
asn1_read_Integer(asn1, &token->reqFlags);
token->reqFlags |= SPNEGO_REQ_FLAG;
asn1_end_tag(asn1);
break;
/* Read mechToken */
case ASN1_CONTEXT(2):
asn1_start_tag(asn1, ASN1_CONTEXT(2));
asn1_read_OctetString(asn1, mem_ctx, &token->mechToken);
asn1_end_tag(asn1);
break;
/* Read mecListMIC */
case ASN1_CONTEXT(3):
{
uint8_t type_peek;
asn1_start_tag(asn1, ASN1_CONTEXT(3));
if (!asn1_peek_uint8(asn1, &type_peek)) {
asn1->has_error = true;
break;
}
if (type_peek == ASN1_OCTET_STRING) {
asn1_read_OctetString(asn1, mem_ctx,
&token->mechListMIC);
} else {
/* RFC 2478 says we have an Octet String here,
but W2k sends something different... */
char *mechListMIC;
asn1_push_tag(asn1, ASN1_SEQUENCE(0));
asn1_push_tag(asn1, ASN1_CONTEXT(0));
asn1_read_GeneralString(asn1, mem_ctx, &mechListMIC);
asn1_pop_tag(asn1);
asn1_pop_tag(asn1);
token->targetPrincipal = mechListMIC;
}
asn1_end_tag(asn1);
break;
}
default:
asn1->has_error = true;
break;
}
}
asn1_end_tag(asn1);
asn1_end_tag(asn1);
return !asn1->has_error;
}
static int reply_sesssetup_and_X_spnego(connection_struct *conn, char *inbuf,
char *outbuf,
int length,int bufsize)
{
uint8 *p;
DATA_BLOB blob1;
int ret;
size_t bufrem;
fstring native_os, native_lanman, primary_domain;
char *p2;
uint16 data_blob_len = SVAL(inbuf, smb_vwv7);
enum remote_arch_types ra_type = get_remote_arch();
DEBUG(3,("Doing spnego session setup\n"));
if (global_client_caps == 0) {
global_client_caps = IVAL(inbuf,smb_vwv10);
if (!(global_client_caps & CAP_STATUS32)) {
remove_from_common_flags2(FLAGS2_32_BIT_ERROR_CODES);
}
}
p = (uint8 *)smb_buf(inbuf);
if (data_blob_len == 0) {
/* an invalid request */
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
bufrem = smb_bufrem(inbuf, p);
/* pull the spnego blob */
blob1 = data_blob(p, MIN(bufrem, data_blob_len));
#if 0
file_save("negotiate.dat", blob1.data, blob1.length);
#endif
p2 = inbuf + smb_vwv13 + data_blob_len;
p2 += srvstr_pull_buf(inbuf, native_os, p2, sizeof(native_os), STR_TERMINATE);
p2 += srvstr_pull_buf(inbuf, native_lanman, p2, sizeof(native_lanman), STR_TERMINATE);
p2 += srvstr_pull_buf(inbuf, primary_domain, p2, sizeof(primary_domain), STR_TERMINATE);
DEBUG(3,("NativeOS=[%s] NativeLanMan=[%s] PrimaryDomain=[%s]\n",
native_os, native_lanman, primary_domain));
if ( ra_type == RA_WIN2K ) {
/* Windows 2003 doesn't set the native lanman string,
but does set primary domain which is a bug I think */
if ( !strlen(native_lanman) )
ra_lanman_string( primary_domain );
else
ra_lanman_string( native_lanman );
}
if (blob1.data[0] == ASN1_APPLICATION(0)) {
/* its a negTokenTarg packet */
ret = reply_spnego_negotiate(conn, inbuf, outbuf, length, bufsize, blob1);
data_blob_free(&blob1);
return ret;
}
if (blob1.data[0] == ASN1_CONTEXT(1)) {
/* its a auth packet */
ret = reply_spnego_auth(conn, inbuf, outbuf, length, bufsize, blob1);
data_blob_free(&blob1);
return ret;
}
/* Foxconn modified start pling 12/29/2011 */
/* Fix Android partial auth issue.
* Port from Samba 3.0.24 (used by WNDR3800) */
if (strncmp((char *)(blob1.data), "NTLMSSP", 7) == 0) {
DATA_BLOB chal;
NTSTATUS nt_status;
if (!global_ntlmssp_state) {
nt_status = auth_ntlmssp_start(&global_ntlmssp_state);
if (!NT_STATUS_IS_OK(nt_status)) {
return ERROR_NT(nt_status_squash(nt_status));
}
}
nt_status = auth_ntlmssp_update(global_ntlmssp_state,
blob1, &chal);
data_blob_free(&blob1);
reply_spnego_ntlmssp(conn, inbuf, outbuf,
&global_ntlmssp_state,
&chal, nt_status, False);
data_blob_free(&chal);
return -1;
}
/* Foxconn added end pling 12/29/2011 */
/* what sort of packet is this? */
DEBUG(1,("Unknown packet in reply_sesssetup_and_X_spnego\n"));
data_blob_free(&blob1);
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
