return ret;
}
+/*
+ Generate a negTokenInit as used by the client side ... It has a mechType
+ (OID), and a mechToken (a security blob) ...
+
+ Really, we need to break out the NTLMSSP stuff as well, because it could be
+ raw in the packets!
+*/
+DATA_BLOB gen_negTokenInit(const char *OID, DATA_BLOB blob)
+{
+ 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));
+ asn1_write_OID(&data, OID);
+ 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 negTokenInit at offset %d\n", (int)data.ofs));
+ asn1_free(&data);
+ }
+
+ ret = data_blob(data.data, data.length);
+ asn1_free(&data);
+
+ return ret;
+}
/*
parse a negTokenInit packet giving a GUID, a list of supported
generate a SPNEGO negTokenTarg packet, ready for a EXTENDED_SECURITY
kerberos session setup
*/
-DATA_BLOB spnego_gen_negTokenTarg(const char *principal)
+DATA_BLOB spnego_gen_negTokenTarg(const char *principal, int time_offset)
{
DATA_BLOB tkt, tkt_wrapped, targ;
const char *krb_mechs[] = {OID_KERBEROS5_OLD, OID_NTLMSSP, NULL};
/* get a kerberos ticket for the service */
- tkt = krb5_get_ticket(principal);
+ tkt = krb5_get_ticket(principal, time_offset);
/* wrap that up in a nice GSS-API wrapping */
tkt_wrapped = spnego_gen_krb5_wrap(tkt);
}
-/*
- generate a spnego NTLMSSP challenge packet given two security blobs
- The second challenge is optional
-*/
-BOOL spnego_gen_challenge(DATA_BLOB *blob,
- DATA_BLOB *chal1, DATA_BLOB *chal2)
-{
- ASN1_DATA data;
-
- 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,1);
- asn1_pop_tag(&data);
-
- asn1_push_tag(&data,ASN1_CONTEXT(1));
- asn1_write_OID(&data, OID_NTLMSSP);
- asn1_pop_tag(&data);
-
- asn1_push_tag(&data,ASN1_CONTEXT(2));
- asn1_write_OctetString(&data, chal1->data, chal1->length);
- asn1_pop_tag(&data);
-
- /* the second challenge is optional (XP doesn't send it) */
- if (chal2) {
- asn1_push_tag(&data,ASN1_CONTEXT(3));
- asn1_write_OctetString(&data, chal2->data, chal2->length);
- asn1_pop_tag(&data);
- }
-
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
-
- if (data.has_error) {
- return False;
- }
-
- *blob = data_blob(data.data, data.length);
- asn1_free(&data);
- return True;
-}
-
/*
generate a SPNEGO NTLMSSP auth packet. This will contain the encrypted passwords
*/
/*
generate a minimal SPNEGO NTLMSSP response packet. Doesn't contain much.
*/
-DATA_BLOB spnego_gen_auth_response(void)
+DATA_BLOB spnego_gen_auth_response(DATA_BLOB *ntlmssp_reply, NTSTATUS nt_status)
{
ASN1_DATA data;
DATA_BLOB ret;
+ uint8 negResult;
- memset(&data, 0, sizeof(data));
+ 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, 0);
+ asn1_write_enumerated(&data, negResult);
asn1_pop_tag(&data);
+ if (negResult == SPNEGO_NEG_RESULT_INCOMPLETE) {
+ asn1_push_tag(&data,ASN1_CONTEXT(1));
+ asn1_write_OID(&data, OID_NTLMSSP);
+ asn1_pop_tag(&data);
+
+ asn1_push_tag(&data,ASN1_CONTEXT(2));
+ asn1_write_OctetString(&data, ntlmssp_reply->data, ntlmssp_reply->length);
+ asn1_pop_tag(&data);
+ }
+
asn1_pop_tag(&data);
asn1_pop_tag(&data);
format specifiers are:
U = unicode string (input is unix string)
- a = address (1 byte type, 1 byte length, unicode string, all inline)
- A = ASCII string (pointer + length) Actually same as B
+ a = address (input is BOOL unicode, char *unix_string)
+ (1 byte type, 1 byte length, unicode/ASCII string, all inline)
+ A = ASCII string (input is unix string)
B = data blob (pointer + length)
b = data blob in header (pointer + length)
+ D
d = word (4 bytes)
C = constant ascii string
*/
uint8 *b;
int head_size=0, data_size=0;
int head_ofs, data_ofs;
+ BOOL unicode;
/* first scan the format to work out the header and body size */
va_start(ap, format);
head_size += 8;
data_size += str_charnum(s) * 2;
break;
+ case 'A':
+ s = va_arg(ap, char *);
+ head_size += 8;
+ data_size += str_ascii_charnum(s);
+ break;
case 'a':
+ unicode = va_arg(ap, BOOL);
n = va_arg(ap, int);
s = va_arg(ap, char *);
- data_size += (str_charnum(s) * 2) + 4;
+ if (unicode) {
+ data_size += (str_charnum(s) * 2) + 4;
+ } else {
+ data_size += (str_ascii_charnum(s)) + 4;
+ }
break;
- case 'A':
case 'B':
b = va_arg(ap, uint8 *);
head_size += 8;
push_string(NULL, blob->data+data_ofs, s, n*2, STR_UNICODE|STR_NOALIGN);
data_ofs += n*2;
break;
+ case 'A':
+ s = va_arg(ap, char *);
+ n = str_ascii_charnum(s);
+ SSVAL(blob->data, head_ofs, n); head_ofs += 2;
+ SSVAL(blob->data, head_ofs, n); head_ofs += 2;
+ SIVAL(blob->data, head_ofs, data_ofs); head_ofs += 4;
+ push_string(NULL, blob->data+data_ofs, s, n, STR_ASCII|STR_NOALIGN);
+ data_ofs += n;
+ break;
case 'a':
+ unicode = va_arg(ap, BOOL);
n = va_arg(ap, int);
SSVAL(blob->data, data_ofs, n); data_ofs += 2;
s = va_arg(ap, char *);
- n = str_charnum(s);
- SSVAL(blob->data, data_ofs, n*2); data_ofs += 2;
- if (0 < n) {
- push_string(NULL, blob->data+data_ofs, s, n*2,
- STR_UNICODE|STR_NOALIGN);
+ if (unicode) {
+ n = str_charnum(s);
+ SSVAL(blob->data, data_ofs, n*2); data_ofs += 2;
+ if (0 < n) {
+ push_string(NULL, blob->data+data_ofs, s, n*2,
+ STR_UNICODE|STR_NOALIGN);
+ }
+ data_ofs += n*2;
+ } else {
+ n = str_ascii_charnum(s);
+ SSVAL(blob->data, data_ofs, n); data_ofs += 2;
+ if (0 < n) {
+ push_string(NULL, blob->data+data_ofs, s, n,
+ STR_ASCII|STR_NOALIGN);
+ }
+ data_ofs += n;
}
- data_ofs += n*2;
break;
-
+
case 'B':
b = va_arg(ap, uint8 *);
n = va_arg(ap, int);
}
+/* a helpful macro to avoid running over the end of our blob */
+#define NEED_DATA(amount) \
+if (head_ofs + amount > blob->length) { \
+ return False; \
+}
+
/*
this is a tiny msrpc packet parser. This the the partner of msrpc_gen
d = word (4 bytes)
C = constant ascii string
*/
+
BOOL msrpc_parse(DATA_BLOB *blob,
const char *format, ...)
{
for (i=0; format[i]; i++) {
switch (format[i]) {
case 'U':
+ NEED_DATA(8);
len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
+
/* make sure its in the right format - be strict */
- if (len1 != len2 || (len1&1) || ptr + len1 > blob->length) {
+ if (len1 != len2 || ptr + len1 > blob->length) {
return False;
}
+ if (len1 & 1) {
+ /* if odd length and unicode */
+ return False;
+ }
+
ps = va_arg(ap, char **);
- pull_string(NULL, p, blob->data + ptr, -1, len1,
- STR_UNICODE|STR_NOALIGN);
- (*ps) = strdup(p);
+ if (0 < len1) {
+ pull_string(NULL, p, blob->data + ptr, sizeof(p),
+ len1,
+ STR_UNICODE|STR_NOALIGN);
+ (*ps) = strdup(p);
+ } else {
+ (*ps) = NULL;
+ }
break;
case 'A':
+ NEED_DATA(8);
len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
if (len1 != len2 || ptr + len1 > blob->length) {
return False;
}
+
ps = va_arg(ap, char **);
if (0 < len1) {
- pull_string(NULL, p, blob->data + ptr, -1,
- len1, STR_ASCII|STR_NOALIGN);
+ pull_string(NULL, p, blob->data + ptr, sizeof(p),
+ len1,
+ STR_ASCII|STR_NOALIGN);
(*ps) = strdup(p);
} else {
(*ps) = NULL;
}
break;
case 'B':
+ NEED_DATA(8);
len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
case 'b':
b = (DATA_BLOB *)va_arg(ap, void *);
len1 = va_arg(ap, unsigned);
+ /* make sure its in the right format - be strict */
+ NEED_DATA(len1);
*b = data_blob(blob->data + head_ofs, len1);
head_ofs += len1;
break;
case 'd':
v = va_arg(ap, uint32 *);
+ NEED_DATA(4);
*v = IVAL(blob->data, head_ofs); head_ofs += 4;
break;
case 'C':
s = va_arg(ap, char *);
- head_ofs += pull_string(NULL, p, blob->data+head_ofs, -1,
+ head_ofs += pull_string(NULL, p, blob->data+head_ofs, sizeof(p),
blob->length - head_ofs,
STR_ASCII|STR_TERMINATE);
if (strcmp(s, p) != 0) {
git.samba.org / jra / samba / .git / blobdiff