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 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;
}
/*
receive a cldap netlogon reply
*/
static int recv_cldap_netlogon(TALLOC_CTX *mem_ctx,
int sock,
uint32_t *nt_version,
union nbt_cldap_netlogon **reply)
{
int ret;
ASN1_DATA data;
DATA_BLOB blob = data_blob_null;
DATA_BLOB os1 = data_blob_null;
DATA_BLOB os2 = data_blob_null;
DATA_BLOB os3 = data_blob_null;
int i1;
/* half the time of a regular ldap timeout, not less than 3 seconds. */
unsigned int al_secs = MAX(3,lp_ldap_timeout()/2);
union nbt_cldap_netlogon *r = NULL;
blob = data_blob(NULL, 8192);
if (blob.data == NULL) {
DEBUG(1, ("data_blob failed\n"));
errno = ENOMEM;
return -1;
}
/* Setup timeout */
gotalarm = 0;
CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
alarm(al_secs);
/* End setup timeout. */
ret = read(sock, blob.data, blob.length);
/* Teardown timeout. */
CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
alarm(0);
if (ret <= 0) {
DEBUG(1,("no reply received to cldap netlogon\n"));
data_blob_free(&blob);
return -1;
}
blob.length = ret;
asn1_load(&data, blob);
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_read_Integer(&data, &i1);
asn1_start_tag(&data, ASN1_APPLICATION(4));
asn1_read_OctetString(&data, &os1);
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_read_OctetString(&data, &os2);
asn1_start_tag(&data, ASN1_SET);
asn1_read_OctetString(&data, &os3);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
if (data.has_error) {
data_blob_free(&blob);
data_blob_free(&os1);
data_blob_free(&os2);
data_blob_free(&os3);
asn1_free(&data);
DEBUG(1,("Failed to parse cldap reply\n"));
return -1;
}
r = TALLOC_ZERO_P(mem_ctx, union nbt_cldap_netlogon);
if (!r) {
errno = ENOMEM;
data_blob_free(&os1);
data_blob_free(&os2);
data_blob_free(&os3);
data_blob_free(&blob);
return -1;
}
if (!pull_mailslot_cldap_reply(mem_ctx, &os3, r, nt_version)) {
data_blob_free(&os1);
data_blob_free(&os2);
data_blob_free(&os3);
data_blob_free(&blob);
TALLOC_FREE(r);
return -1;
}
data_blob_free(&os1);
data_blob_free(&os2);
data_blob_free(&os3);
data_blob_free(&blob);
asn1_free(&data);
if (reply) {
*reply = r;
} else {
TALLOC_FREE(r);
}
return 0;
}
/*
receive a cldap netlogon reply
*/
static int recv_cldap_netlogon(int sock, struct cldap_netlogon_reply *reply)
{
int ret;
ASN1_DATA data;
DATA_BLOB blob;
DATA_BLOB os1, os2, os3;
uint32 i1;
char *p;
blob = data_blob(NULL, 8192);
ret = read(sock, blob.data, blob.length);
if (ret <= 0) {
d_printf("no reply received to cldap netlogon\n");
return -1;
}
blob.length = ret;
asn1_load(&data, blob);
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_read_Integer(&data, &i1);
asn1_start_tag(&data, ASN1_APPLICATION(4));
asn1_read_OctetString(&data, &os1);
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_read_OctetString(&data, &os2);
asn1_start_tag(&data, ASN1_SET);
asn1_read_OctetString(&data, &os3);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
if (data.has_error) {
d_printf("Failed to parse cldap reply\n");
return -1;
}
p = (char *)os3.data;
reply->type = IVAL(p, 0); p += 4;
reply->flags = IVAL(p, 0); p += 4;
memcpy(&reply->guid.info, p, UUID_FLAT_SIZE);
p += UUID_FLAT_SIZE;
p += pull_netlogon_string(reply->forest, p, (const char *)os3.data);
p += pull_netlogon_string(reply->domain, p, (const char *)os3.data);
p += pull_netlogon_string(reply->hostname, p, (const char *)os3.data);
p += pull_netlogon_string(reply->netbios_domain, p, (const char *)os3.data);
p += pull_netlogon_string(reply->netbios_hostname, p, (const char *)os3.data);
p += pull_netlogon_string(reply->unk, p, (const char *)os3.data);
if (reply->type == SAMLOGON_AD_R) {
p += pull_netlogon_string(reply->user_name, p, (const char *)os3.data);
} else {
*reply->user_name = 0;
}
p += pull_netlogon_string(reply->site_name, p, (const char *)os3.data);
p += pull_netlogon_string(reply->site_name_2, p, (const char *)os3.data);
reply->version = IVAL(p, 0);
reply->lmnt_token = SVAL(p, 4);
reply->lm20_token = SVAL(p, 6);
data_blob_free(&os1);
data_blob_free(&os2);
data_blob_free(&os3);
data_blob_free(&blob);
return 0;
}
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;
}
