Пример #1
0
/*
  parse a krb5 GSS-API wrapper packet giving a ticket
*/
BOOL spnego_parse_krb5_wrap(DATA_BLOB blob, DATA_BLOB *ticket, uint8 tok_id[2])
{
	BOOL ret;
	ASN1_DATA data;
	int data_remaining;

	asn1_load(&data, blob);
	asn1_start_tag(&data, ASN1_APPLICATION(0));
	asn1_check_OID(&data, OID_KERBEROS5);

	data_remaining = asn1_tag_remaining(&data);

	if (data_remaining < 3) {
		data.has_error = True;
	} else {
		asn1_read(&data, tok_id, 2);
		data_remaining -= 2;
		*ticket = data_blob(NULL, data_remaining);
		asn1_read(&data, ticket->data, ticket->length);
	}

	asn1_end_tag(&data);

	ret = !data.has_error;

	asn1_free(&data);

	return ret;
}
Пример #2
0
/*
  parse a krb5 GSS-API wrapper packet giving a ticket
*/
static bool gensec_gssapi_parse_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, DATA_BLOB *ticket, uint8_t tok_id[2])
{
    bool ret;
    struct asn1_data *data = asn1_init(mem_ctx);
    int data_remaining;

    if (!data) {
        return false;
    }

    asn1_load(data, *blob);
    asn1_start_tag(data, ASN1_APPLICATION(0));
    asn1_check_OID(data, GENSEC_OID_KERBEROS5);

    data_remaining = asn1_tag_remaining(data);

    if (data_remaining < 3) {
        data->has_error = true;
    } else {
        asn1_read(data, tok_id, 2);
        data_remaining -= 2;
        *ticket = data_blob_talloc(mem_ctx, NULL, data_remaining);
        asn1_read(data, ticket->data, ticket->length);
    }

    asn1_end_tag(data);

    ret = !data->has_error;

    asn1_free(data);

    return ret;
}
Пример #3
0
ssize_t read_spnego_data(DATA_BLOB data, SPNEGO_DATA *token)
{
	ASN1_DATA asn1;
	ssize_t ret = -1;

	ZERO_STRUCTP(token);
	ZERO_STRUCT(asn1);
	asn1_load(&asn1, data);

	switch (asn1.data[asn1.ofs]) {
	case ASN1_APPLICATION(0):
		asn1_start_tag(&asn1, ASN1_APPLICATION(0));
		asn1_check_OID(&asn1, OID_SPNEGO);
		if (read_negTokenInit(&asn1, &token->negTokenInit)) {
			token->type = SPNEGO_NEG_TOKEN_INIT;
		}
		asn1_end_tag(&asn1);
		break;
	case ASN1_CONTEXT(1):
		if (read_negTokenTarg(&asn1, &token->negTokenTarg)) {
			token->type = SPNEGO_NEG_TOKEN_TARG;
		}
		break;
	default:
		break;
	}

	if (!asn1.has_error) ret = asn1.ofs;
	asn1_free(&asn1);

	return ret;
}
Пример #4
0
/*
  decode/process data
*/
static NTSTATUS ldapsrv_decode(void *private_data, DATA_BLOB blob)
{
	NTSTATUS status;
	struct ldapsrv_connection *conn = talloc_get_type(private_data,
							  struct ldapsrv_connection);
	struct asn1_data *asn1 = asn1_init(conn);
	struct ldap_message *msg = talloc(conn, struct ldap_message);

	if (asn1 == NULL || msg == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	if (!asn1_load(asn1, blob)) {
		talloc_free(msg);
		talloc_free(asn1);
		return NT_STATUS_NO_MEMORY;
	}

	status = ldap_decode(asn1, samba_ldap_control_handlers(), msg);
	if (!NT_STATUS_IS_OK(status)) {
		asn1_free(asn1);
		return status;
	}

	data_blob_free(&blob);
	talloc_steal(conn, msg);
	asn1_free(asn1);

	ldapsrv_process_message(conn, msg);
	return NT_STATUS_OK;
}
Пример #5
0
/*
  parse a spnego NTLMSSP challenge packet giving two security blobs
*/
bool spnego_parse_challenge(TALLOC_CTX *ctx, const DATA_BLOB blob,
			    DATA_BLOB *chal1, DATA_BLOB *chal2)
{
	bool ret = false;
	ASN1_DATA *data;

	ZERO_STRUCTP(chal1);
	ZERO_STRUCTP(chal2);

	data = asn1_init(talloc_tos());
	if (data == NULL) {
		return false;
	}

	if (!asn1_load(data, blob)) goto err;
	if (!asn1_start_tag(data,ASN1_CONTEXT(1))) goto err;
	if (!asn1_start_tag(data,ASN1_SEQUENCE(0))) goto err;

	if (!asn1_start_tag(data,ASN1_CONTEXT(0))) goto err;
	if (!asn1_check_enumerated(data,1)) goto err;
	if (!asn1_end_tag(data)) goto err;

	if (!asn1_start_tag(data,ASN1_CONTEXT(1))) goto err;
	if (!asn1_check_OID(data, OID_NTLMSSP)) goto err;
	if (!asn1_end_tag(data)) goto err;

	if (!asn1_start_tag(data,ASN1_CONTEXT(2))) goto err;
	if (!asn1_read_OctetString(data, ctx, chal1)) goto err;
	if (!asn1_end_tag(data)) goto err;

	/* the second challenge is optional (XP doesn't send it) */
	if (asn1_tag_remaining(data)) {
		if (!asn1_start_tag(data,ASN1_CONTEXT(3))) goto err;
		if (!asn1_read_OctetString(data, ctx, chal2)) goto err;
		if (!asn1_end_tag(data)) goto err;
	}

	if (!asn1_end_tag(data)) goto err;
	if (!asn1_end_tag(data)) goto err;

	ret = !asn1_has_error(data);

  err:

	if (asn1_has_error(data)) {
		data_blob_free(chal1);
		data_blob_free(chal2);
	}

	asn1_free(data);
	return ret;
}
Пример #6
0
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;
}
/*
  magic check a GSS-API wrapper packet for an Kerberos OID
*/
static bool gensec_gssapi_check_oid(const DATA_BLOB *blob, const char *oid)
{
	bool ret;
	struct asn1_data *data = asn1_init(NULL);

	if (!data) return false;

	asn1_load(data, *blob);
	asn1_start_tag(data, ASN1_APPLICATION(0));
	asn1_check_OID(data, oid);

	ret = !data->has_error;

	asn1_free(data);

	return ret;
}
Пример #8
0
/*
 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;
}
Пример #9
0
/*
  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;
}
Пример #10
0
/*
  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;
}
Пример #11
0
/*
  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;
}
Пример #12
0
/*
 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;
}
Пример #13
0
/*
  parse a krb5 GSS-API wrapper packet giving a ticket
*/
bool spnego_parse_krb5_wrap(TALLOC_CTX *ctx, DATA_BLOB blob, DATA_BLOB *ticket, uint8 tok_id[2])
{
    bool ret;
    ASN1_DATA *data;
    int data_remaining;

    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_KERBEROS5);

    data_remaining = asn1_tag_remaining(data);

    if (data_remaining < 3) {
        data->has_error = True;
    } else {
        asn1_read(data, tok_id, 2);
        data_remaining -= 2;
        *ticket = data_blob_talloc(ctx, NULL, data_remaining);
        asn1_read(data, ticket->data, ticket->length);
    }

    asn1_end_tag(data);

    ret = !data->has_error;

    if (data->has_error) {
        data_blob_free(ticket);
    }

    asn1_free(data);

    return ret;
}
Пример #14
0
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;
}
Пример #15
0
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;
}
Пример #16
0
/*
  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;
}
Пример #17
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;
}
Пример #18
0
/*
 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;
}
Пример #19
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;
}
Пример #20
0
/*
  handle recv events on a cldap socket
*/
static bool cldap_socket_recv_dgram(struct cldap_socket *c,
				    struct cldap_incoming *in)
{
	DATA_BLOB blob;
	struct asn1_data *asn1;
	void *p;
	struct cldap_search_state *search;
	NTSTATUS status;

	if (in->recv_errno != 0) {
		goto error;
	}

	blob = data_blob_const(in->buf, in->len);

	asn1 = asn1_init(in);
	if (!asn1) {
		goto nomem;
	}

	if (!asn1_load(asn1, blob)) {
		goto nomem;
	}

	in->ldap_msg = talloc(in, struct ldap_message);
	if (in->ldap_msg == NULL) {
		goto nomem;
	}

	/* this initial decode is used to find the message id */
	status = ldap_decode(asn1, NULL, in->ldap_msg);
	if (!NT_STATUS_IS_OK(status)) {
		goto nterror;
	}

	/* find the pending request */
	p = idr_find(c->searches.idr, in->ldap_msg->messageid);
	if (p == NULL) {
		if (!c->incoming.handler) {
			TALLOC_FREE(in);
			return true;
		}

		/* this function should free or steal 'in' */
		c->incoming.handler(c, c->incoming.private_data, in);
		return false;
	}

	search = talloc_get_type_abort(p, struct cldap_search_state);
	search->response.in = talloc_move(search, &in);
	search->response.asn1 = asn1;
	search->response.asn1->ofs = 0;

	DLIST_REMOVE(c->searches.list, search);

	if (cldap_recvfrom_setup(c)) {
		tevent_req_done(search->req);
		return true;
	}

	/*
	 * This request was ok, just defer the notify of the caller
	 * and then just fail the next request if needed
	 */
	tevent_req_defer_callback(search->req, search->caller.ev);
	tevent_req_done(search->req);

	status = NT_STATUS_NO_MEMORY;
	/* in is NULL it this point */
	goto nterror;
nomem:
	in->recv_errno = ENOMEM;
error:
	status = map_nt_error_from_unix_common(in->recv_errno);
nterror:
	TALLOC_FREE(in);
	/* in connected mode the first pending search gets the error */
	if (!c->connected) {
		/* otherwise we just ignore the error */
		return false;
	}
	if (!c->searches.list) {
		return false;
	}
	/*
	 * We might called tevent_req_done() for a successful
	 * search before, so we better deliver the failure
	 * after the success, that is why we better also
	 * use tevent_req_defer_callback() here.
	 */
	tevent_req_defer_callback(c->searches.list->req,
				  c->searches.list->caller.ev);
	tevent_req_nterror(c->searches.list->req, status);
	return false;
}
Пример #21
0
static void ldapsrv_call_read_done(struct tevent_req *subreq)
{
	struct ldapsrv_connection *conn =
		tevent_req_callback_data(subreq,
		struct ldapsrv_connection);
	NTSTATUS status;
	struct ldapsrv_call *call;
	struct asn1_data *asn1;
	DATA_BLOB blob;

	call = talloc_zero(conn, struct ldapsrv_call);
	if (!call) {
		ldapsrv_terminate_connection(conn, "no memory");
		return;
	}

	call->conn = conn;

	status = tstream_read_pdu_blob_recv(subreq,
					    call,
					    &blob);
	TALLOC_FREE(subreq);
	if (!NT_STATUS_IS_OK(status)) {
		const char *reason;

		reason = talloc_asprintf(call, "ldapsrv_call_loop: "
					 "tstream_read_pdu_blob_recv() - %s",
					 nt_errstr(status));
		if (!reason) {
			reason = nt_errstr(status);
		}

		ldapsrv_terminate_connection(conn, reason);
		return;
	}

	asn1 = asn1_init(call);
	if (asn1 == NULL) {
		ldapsrv_terminate_connection(conn, "no memory");
		return;
	}

	call->request = talloc(call, struct ldap_message);
	if (call->request == NULL) {
		ldapsrv_terminate_connection(conn, "no memory");
		return;
	}

	if (!asn1_load(asn1, blob)) {
		ldapsrv_terminate_connection(conn, "asn1_load failed");
		return;
	}

	status = ldap_decode(asn1, samba_ldap_control_handlers(),
			     call->request);
	if (!NT_STATUS_IS_OK(status)) {
		ldapsrv_terminate_connection(conn, nt_errstr(status));
		return;
	}

	data_blob_free(&blob);


	/* queue the call in the global queue */
	subreq = ldapsrv_process_call_send(call,
					   conn->connection->event.ctx,
					   conn->service->call_queue,
					   call);
	if (subreq == NULL) {
		ldapsrv_terminate_connection(conn, "ldapsrv_process_call_send failed");
		return;
	}
	tevent_req_set_callback(subreq, ldapsrv_call_process_done, call);
	conn->active_call = subreq;
}
Пример #22
0
/*
  handle recv events on a cldap socket
*/
static void cldap_socket_recv_dgram(struct cldap_socket *c,
				    struct cldap_incoming *in)
{
	DATA_BLOB blob;
	struct asn1_data *asn1;
	void *p;
	struct cldap_search_state *search;
	NTSTATUS status;

	if (in->recv_errno != 0) {
		goto error;
	}

	blob = data_blob_const(in->buf, in->len);

	asn1 = asn1_init(in);
	if (!asn1) {
		goto nomem;
	}

	if (!asn1_load(asn1, blob)) {
		goto nomem;
	}

	in->ldap_msg = talloc(in, struct ldap_message);
	if (in->ldap_msg == NULL) {
		goto nomem;
	}

	/* this initial decode is used to find the message id */
	status = ldap_decode(asn1, NULL, in->ldap_msg);
	if (!NT_STATUS_IS_OK(status)) {
		goto nterror;
	}

	/* find the pending request */
	p = idr_find(c->searches.idr, in->ldap_msg->messageid);
	if (p == NULL) {
		if (!c->incoming.handler) {
			goto done;
		}

		/* this function should free or steal 'in' */
		c->incoming.handler(c, c->incoming.private_data, in);
		return;
	}

	search = talloc_get_type(p, struct cldap_search_state);
	search->response.in = talloc_move(search, &in);
	search->response.asn1 = asn1;
	search->response.asn1->ofs = 0;

	tevent_req_done(search->req);
	goto done;

nomem:
	in->recv_errno = ENOMEM;
error:
	status = map_nt_error_from_unix(in->recv_errno);
nterror:
	/* in connected mode the first pending search gets the error */
	if (!c->connected) {
		/* otherwise we just ignore the error */
		goto done;
	}
	if (!c->searches.list) {
		goto done;
	}
	tevent_req_nterror(c->searches.list->req, status);
done:
	talloc_free(in);
}