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-rw-r--r--source4/auth/kerberos/kerberos_pac.c10
-rw-r--r--source4/kdc/kdc.c112
-rw-r--r--source4/librpc/idl/irpc.idl17
-rw-r--r--source4/librpc/idl/krb5pac.idl2
-rw-r--r--source4/rpc_server/netlogon/dcerpc_netlogon.c60
-rw-r--r--source4/samba4-skip1
6 files changed, 164 insertions, 38 deletions
diff --git a/source4/auth/kerberos/kerberos_pac.c b/source4/auth/kerberos/kerberos_pac.c
index 9ebace32cb..2943e05b18 100644
--- a/source4/auth/kerberos/kerberos_pac.c
+++ b/source4/auth/kerberos/kerberos_pac.c
@@ -32,11 +32,11 @@
#include "auth/auth_sam_reply.h"
#include "param/param.h"
-static krb5_error_code check_pac_checksum(TALLOC_CTX *mem_ctx,
- DATA_BLOB pac_data,
- struct PAC_SIGNATURE_DATA *sig,
- krb5_context context,
- const krb5_keyblock *keyblock)
+krb5_error_code check_pac_checksum(TALLOC_CTX *mem_ctx,
+ DATA_BLOB pac_data,
+ struct PAC_SIGNATURE_DATA *sig,
+ krb5_context context,
+ const krb5_keyblock *keyblock)
{
krb5_error_code ret;
krb5_crypto crypto;
diff --git a/source4/kdc/kdc.c b/source4/kdc/kdc.c
index dfd62c55a4..5d7b48afe4 100644
--- a/source4/kdc/kdc.c
+++ b/source4/kdc/kdc.c
@@ -33,9 +33,12 @@
#include "lib/messaging/irpc.h"
#include "lib/stream/packet.h"
#include "librpc/gen_ndr/samr.h"
+#include "librpc/gen_ndr/ndr_irpc.h"
+#include "librpc/gen_ndr/ndr_krb5pac.h"
#include "lib/socket/netif.h"
#include "param/param.h"
#include "kdc/kdc.h"
+#include "librpc/gen_ndr/ndr_misc.h"
/* Disgusting hack to get a mem_ctx and lp_ctx into the hdb plugin, when
@@ -555,6 +558,108 @@ static struct krb5plugin_windc_ftable windc_plugin_table = {
};
+static NTSTATUS kdc_check_generic_kerberos(struct irpc_message *msg,
+ struct kdc_check_generic_kerberos *r)
+{
+ struct PAC_Validate pac_validate;
+ DATA_BLOB srv_sig;
+ struct PAC_SIGNATURE_DATA kdc_sig;
+ struct kdc_server *kdc = talloc_get_type(msg->private, struct kdc_server);
+ enum ndr_err_code ndr_err;
+ krb5_enctype etype;
+ int ret;
+ hdb_entry_ex ent;
+ krb5_principal principal;
+ krb5_keyblock keyblock;
+ Key *key;
+
+ /* There is no reply to this request */
+ r->out.generic_reply = data_blob(NULL, 0);
+
+ ndr_err = ndr_pull_struct_blob(&r->in.generic_request, msg,
+ lp_iconv_convenience(kdc->task->lp_ctx),
+ &pac_validate,
+ (ndr_pull_flags_fn_t)ndr_pull_PAC_Validate);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+#if 0
+ /* Windows does not check this */
+ if (pac_validate.MessageType != 3) {
+ /* We don't implement any other message types - such as certificate validation - yet */
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+#endif
+ if (pac_validate.ChecksumAndSignature.length != (pac_validate.ChecksumLength + pac_validate.SignatureLength)
+ || pac_validate.ChecksumAndSignature.length < pac_validate.ChecksumLength
+ || pac_validate.ChecksumAndSignature.length < pac_validate.SignatureLength ) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ srv_sig = data_blob_const(pac_validate.ChecksumAndSignature.data,
+ pac_validate.ChecksumLength);
+
+ if (pac_validate.SignatureType == CKSUMTYPE_HMAC_MD5) {
+ etype = ETYPE_ARCFOUR_HMAC_MD5;
+ } else {
+ ret = krb5_cksumtype_to_enctype(kdc->smb_krb5_context->krb5_context, pac_validate.SignatureType,
+ &etype);
+ if (ret != 0) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+ }
+
+ ret = krb5_make_principal(kdc->smb_krb5_context->krb5_context, &principal,
+ lp_realm(kdc->task->lp_ctx),
+ "krbtgt", lp_realm(kdc->task->lp_ctx),
+ NULL);
+
+ if (ret != 0) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ ret = kdc->config->db[0]->hdb_fetch(kdc->smb_krb5_context->krb5_context,
+ kdc->config->db[0],
+ principal,
+ HDB_F_GET_KRBTGT | HDB_F_DECRYPT,
+ &ent);
+
+ if (ret != 0) {
+ hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
+ krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
+
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ ret = hdb_enctype2key(kdc->smb_krb5_context->krb5_context, &ent.entry, etype, &key);
+
+ if (ret != 0) {
+ hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
+ krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ keyblock = key->key;
+
+ kdc_sig.type = pac_validate.SignatureType;
+ kdc_sig.signature = data_blob_const(&pac_validate.ChecksumAndSignature.data[pac_validate.ChecksumLength],
+ pac_validate.SignatureLength);
+ ret = check_pac_checksum(msg, srv_sig, &kdc_sig,
+ kdc->smb_krb5_context->krb5_context, &keyblock);
+
+ hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
+ krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
+
+ if (ret != 0) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+
/*
startup the kdc task
*/
@@ -656,6 +761,13 @@ static void kdc_task_init(struct task_server *task)
return;
}
+ status = IRPC_REGISTER(task->msg_ctx, irpc, KDC_CHECK_GENERIC_KERBEROS,
+ kdc_check_generic_kerberos, kdc);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, "nbtd failed to setup monitoring");
+ return;
+ }
+
irpc_add_name(task->msg_ctx, "kdc_server");
}
diff --git a/source4/librpc/idl/irpc.idl b/source4/librpc/idl/irpc.idl
index 2c659aa785..e3ea7e55e1 100644
--- a/source4/librpc/idl/irpc.idl
+++ b/source4/librpc/idl/irpc.idl
@@ -52,6 +52,9 @@ import "misc.idl", "security.idl", "nbt.idl";
[out,switch_is(level)] nbtd_info info
);
+ /* Send a GetDCName from the privilaged port (owned by nbtd),
+ * and await a reply */
+
void nbtd_getdcname(
[in] astring domainname,
[in] astring ip_address,
@@ -78,6 +81,20 @@ import "misc.idl", "security.idl", "nbt.idl";
[in] nbtd_proxy_wins_addr addrs[num_addrs]
);
+ /*
+ Generic Kerberos package call (on the NETLOGON pipe, as a SamLogon)
+
+ The normal use for this call is to check the PAC signature in the KDC
+
+ The KDC has the routines to check this, so it is easier to
+ proxy the request over by IRPC than set up the environment
+ */
+
+ void kdc_check_generic_kerberos(
+ [in] DATA_BLOB generic_request,
+ [out] DATA_BLOB generic_reply
+ );
+
/******************************************************
management calls for the smb server
******************************************************/
diff --git a/source4/librpc/idl/krb5pac.idl b/source4/librpc/idl/krb5pac.idl
index dcee280150..bddba04165 100644
--- a/source4/librpc/idl/krb5pac.idl
+++ b/source4/librpc/idl/krb5pac.idl
@@ -105,7 +105,7 @@ interface krb5pac
typedef [public] struct {
[value(NETLOGON_GENERIC_KRB5_PAC_VALIDATE)] uint32 MessageType;
uint32 ChecksumLength;
- uint32 SignatureType;
+ int32 SignatureType;
uint32 SignatureLength;
[flag(NDR_REMAINING)] DATA_BLOB ChecksumAndSignature;
} PAC_Validate;
diff --git a/source4/rpc_server/netlogon/dcerpc_netlogon.c b/source4/rpc_server/netlogon/dcerpc_netlogon.c
index 5672d29cb2..36ac650b08 100644
--- a/source4/rpc_server/netlogon/dcerpc_netlogon.c
+++ b/source4/rpc_server/netlogon/dcerpc_netlogon.c
@@ -34,6 +34,8 @@
#include "auth/gensec/schannel_state.h"
#include "libcli/security/security.h"
#include "param/param.h"
+#include "lib/messaging/irpc.h"
+#include "librpc/gen_ndr/ndr_irpc.h"
struct server_pipe_state {
struct netr_Credential client_challenge;
@@ -496,41 +498,37 @@ static NTSTATUS dcesrv_netr_LogonSamLogon_base(struct dcesrv_call_state *dce_cal
return NT_STATUS_INVALID_PARAMETER;
}
- if (strcmp(r->in.logon.generic->package_name.string, "Kerberos")) {
- struct PAC_Validate pac_validate;
- DATA_BLOB srv_sig;
- struct PAC_SIGNATURE_DATA kdc_sig;
- DATA_BLOB pac_validate_blob = data_blob_const(r->in.logon.generic->data,
- r->in.logon.generic->length);
- ndr_err = ndr_pull_struct_blob(&pac_validate_blob, mem_ctx,
- lp_iconv_convenience(dce_call->conn->dce_ctx->lp_ctx),
- &pac_validate,
- (ndr_pull_flags_fn_t)ndr_pull_PAC_Validate);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- return NT_STATUS_INVALID_PARAMETER;
- }
+ if (strcmp(r->in.logon.generic->package_name.string, "Kerberos") == 0) {
+ NTSTATUS status;
+ struct server_id *kdc;
+ struct kdc_check_generic_kerberos check;
+ struct netr_GenericInfo2 *generic = talloc_zero(mem_ctx, struct netr_GenericInfo2);
+ NT_STATUS_HAVE_NO_MEMORY(generic);
+ r->out.authoritative = 1;
+
+ /* TODO: Describe and deal with these flags */
+ r->out.flags = 0;
- if (pac_validate->MessageType != 3) {
- /* We don't implement any other message types - such as certificate validation - yet */
- return NT_STATUS_INVALID_PARAMETER;
+ r->out.validation.generic = generic;
+
+ kdc = irpc_servers_byname(dce_call->msg_ctx, mem_ctx, "kdc_server");
+ if ((kdc == NULL) || (kdc[0].id == 0)) {
+ return NT_STATUS_NO_LOGON_SERVERS;
}
- if (pac_validate->ChecksumAndSignature.length != (pac_validate->ChecksumLength + pac_validate->SignatureLength)
- || pac_validate->ChecksumAndSignature.length < pac_validate->ChecksumLength
- || pac_validate->ChecksumAndSignature.length < pac_validate->SignatureLength ) {
- return NT_STATUS_INVALID_PARAMETER;
+ check.in.generic_request =
+ data_blob_const(r->in.logon.generic->data,
+ r->in.logon.generic->length);
+
+ status = irpc_call(dce_call->msg_ctx, kdc[0],
+ &ndr_table_irpc, NDR_KDC_CHECK_GENERIC_KERBEROS,
+ &check, mem_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
-
- srv_sig = data_blob_const(pac_validate->ChecksumAndSignature.data,
- pac_validate->ChecksumLength);
-
- kdc_sig.type = pac_validate->SignatureType;
- kdc_sig.signature = data_blob_const(&pac_validate->ChecksumAndSignature.data[pac_validate->ChecksumLength],
- pac_validate->SignatureLength);
- check_pac_checksum(mem_ctx, srv_sig, &kdc_sig,
- context, keyblock);
-
-
+ generic->length = check.out.generic_reply.length;
+ generic->data = check.out.generic_reply.data;
+ return NT_STATUS_OK;
}
/* Until we get an implemetnation of these other packages */
diff --git a/source4/samba4-skip b/source4/samba4-skip
index 35b274f63f..b1313adea0 100644
--- a/source4/samba4-skip
+++ b/source4/samba4-skip
@@ -41,7 +41,6 @@ ntvfs.cifs.raw.context
ntvfs.cifs.raw.qfileinfo.ipc
rpc.dssync
rpc.samsync
-rpc.pac # Not finished yet
ldap.uptodatevector # Segfaults
rpc.remact # Not provided by Samba 4
rpc.oxidresolve # Not provided by Samba 4
generated by cgit (git 2.34.1) at 2024-06-30 16:48:00 +0000