[SCM] Samba Shared Repository - branch v4-0-test updated -
release-4-0-0alpha5-433-g82fcd79
Andrew Bartlett
abartlet at samba.org
Wed Sep 3 05:30:34 GMT 2008
The branch, v4-0-test has been updated
via 82fcd7941f5c54da2d994c8bd99dd8d86299a296 (commit)
via cc1df3c002e6af25add3c8ae20e7efc2ab6f2fa8 (commit)
via 50502b3b8faf89cf5ad396102f4fe80eaa213908 (commit)
via 8741e8fee619cccd84f2f10e00426df1d4f34074 (commit)
from c6b8ba893dd3ed90bca32c0ae89fd33be729c238 (commit)
http://gitweb.samba.org/?p=samba.git;a=shortlog;h=v4-0-test
- Log -----------------------------------------------------------------
commit 82fcd7941f5c54da2d994c8bd99dd8d86299a296
Author: Andrew Bartlett <abartlet at samba.org>
Date: Wed Sep 3 15:30:17 2008 +1000
Implement NETLOGON PAC verfication on the server-side
This is implemented by means of a message to the KDC, to avoid having
to link most of the KDC into netlogon.
Andrew Bartlett
commit cc1df3c002e6af25add3c8ae20e7efc2ab6f2fa8
Author: Andrew Bartlett <abartlet at samba.org>
Date: Wed Sep 3 14:20:30 2008 +1000
Merge krb5_cksumtype_to_enctype from Heimdal svn -r 23719
commit 50502b3b8faf89cf5ad396102f4fe80eaa213908
Author: Andrew Bartlett <abartlet at samba.org>
Date: Wed Sep 3 14:19:16 2008 +1000
Test a few more error cases in RPC-PAC
commit 8741e8fee619cccd84f2f10e00426df1d4f34074
Author: Andrew Bartlett <abartlet at samba.org>
Date: Fri Aug 29 18:05:06 2008 +1000
Start implementing the server-sde NETLOGON PAC verification.
-----------------------------------------------------------------------
Summary of changes:
source/auth/kerberos/kerberos_pac.c | 10 +-
source/heimdal/lib/krb5/crypto.c | 102 ++++++++++-----
source/kdc/kdc.c | 112 ++++++++++++++++
source/librpc/idl/irpc.idl | 17 +++
source/librpc/idl/krb5pac.idl | 2 +-
source/rpc_server/netlogon/dcerpc_netlogon.c | 45 ++++++-
source/samba4-skip | 1 -
source/torture/rpc/remote_pac.c | 181 +++++++++++++++++++++++++-
8 files changed, 428 insertions(+), 42 deletions(-)
Changeset truncated at 500 lines:
diff --git a/source/auth/kerberos/kerberos_pac.c b/source/auth/kerberos/kerberos_pac.c
index 9ebace3..2943e05 100644
--- a/source/auth/kerberos/kerberos_pac.c
+++ b/source/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/source/heimdal/lib/krb5/crypto.c b/source/heimdal/lib/krb5/crypto.c
index 6675647..9379c6f 100644
--- a/source/heimdal/lib/krb5/crypto.c
+++ b/source/heimdal/lib/krb5/crypto.c
@@ -2678,37 +2678,6 @@ krb5_enctype_to_keytype(krb5_context context,
}
krb5_error_code KRB5_LIB_FUNCTION
-krb5_keytype_to_enctypes (krb5_context context,
- krb5_keytype keytype,
- unsigned *len,
- krb5_enctype **val)
-{
- int i;
- unsigned n = 0;
- krb5_enctype *ret;
-
- for (i = num_etypes - 1; i >= 0; --i) {
- if (etypes[i]->keytype->type == keytype
- && !(etypes[i]->flags & F_PSEUDO))
- ++n;
- }
- ret = malloc(n * sizeof(*ret));
- if (ret == NULL && n != 0) {
- krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
- return ENOMEM;
- }
- n = 0;
- for (i = num_etypes - 1; i >= 0; --i) {
- if (etypes[i]->keytype->type == keytype
- && !(etypes[i]->flags & F_PSEUDO))
- ret[n++] = etypes[i]->type;
- }
- *len = n;
- *val = ret;
- return 0;
-}
-
-krb5_error_code KRB5_LIB_FUNCTION
krb5_enctype_valid(krb5_context context,
krb5_enctype etype)
{
@@ -2728,6 +2697,44 @@ krb5_enctype_valid(krb5_context context,
return 0;
}
+/**
+ * Return the coresponding encryption type for a checksum type.
+ *
+ * @param context Kerberos context
+ * @param ctype The checksum type to get the result enctype for
+ * @param etype The returned encryption, when the matching etype is
+ * not found, etype is set to ETYPE_NULL.
+ *
+ * @return Return an error code for an failure or 0 on success.
+ * @ingroup krb5_crypto
+ */
+
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_cksumtype_to_enctype(krb5_context context,
+ krb5_cksumtype ctype,
+ krb5_enctype *etype)
+{
+ int i;
+
+ *etype = ETYPE_NULL;
+
+ for(i = 0; i < num_etypes; i++) {
+ if(etypes[i]->keyed_checksum &&
+ etypes[i]->keyed_checksum->type == ctype)
+ {
+ *etype = etypes[i]->type;
+ return 0;
+ }
+ }
+
+ krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
+ "ckecksum type %d not supported",
+ (int)ctype);
+ return KRB5_PROG_SUMTYPE_NOSUPP;
+}
+
+
krb5_error_code KRB5_LIB_FUNCTION
krb5_cksumtype_valid(krb5_context context,
krb5_cksumtype ctype)
@@ -3491,7 +3498,6 @@ krb5_decrypt_iov_ivec(krb5_context context,
return 0;
}
-
size_t KRB5_LIB_FUNCTION
krb5_crypto_length(krb5_context context,
krb5_crypto crypto,
@@ -4562,4 +4568,36 @@ krb5_string_to_keytype(krb5_context context,
"key type %s not supported", string);
return KRB5_PROG_KEYTYPE_NOSUPP;
}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_keytype_to_enctypes (krb5_context context,
+ krb5_keytype keytype,
+ unsigned *len,
+ krb5_enctype **val)
+{
+ int i;
+ unsigned n = 0;
+ krb5_enctype *ret;
+
+ for (i = num_etypes - 1; i >= 0; --i) {
+ if (etypes[i]->keytype->type == keytype
+ && !(etypes[i]->flags & F_PSEUDO))
+ ++n;
+ }
+ ret = malloc(n * sizeof(*ret));
+ if (ret == NULL && n != 0) {
+ krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
+ return ENOMEM;
+ }
+ n = 0;
+ for (i = num_etypes - 1; i >= 0; --i) {
+ if (etypes[i]->keytype->type == keytype
+ && !(etypes[i]->flags & F_PSEUDO))
+ ret[n++] = etypes[i]->type;
+ }
+ *len = n;
+ *val = ret;
+ return 0;
+}
+
#endif
diff --git a/source/kdc/kdc.c b/source/kdc/kdc.c
index dfd62c5..5d7b48a 100644
--- a/source/kdc/kdc.c
+++ b/source/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/source/librpc/idl/irpc.idl b/source/librpc/idl/irpc.idl
index 2c659aa..e3ea7e5 100644
--- a/source/librpc/idl/irpc.idl
+++ b/source/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/source/librpc/idl/krb5pac.idl b/source/librpc/idl/krb5pac.idl
index dcee280..bddba04 100644
--- a/source/librpc/idl/krb5pac.idl
+++ b/source/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/source/rpc_server/netlogon/dcerpc_netlogon.c b/source/rpc_server/netlogon/dcerpc_netlogon.c
index 763e6a3..36ac650 100644
--- a/source/rpc_server/netlogon/dcerpc_netlogon.c
+++ b/source/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;
@@ -488,7 +490,48 @@ static NTSTATUS dcesrv_netr_LogonSamLogon_base(struct dcesrv_call_state *dce_cal
case NetlogonGenericInformation:
{
- /* Until we get enough information for an implemetnation */
+ if (creds->negotiate_flags & NETLOGON_NEG_ARCFOUR) {
+ creds_arcfour_crypt(creds,
+ r->in.logon.generic->data, r->in.logon.generic->length);
+ } else {
+ /* Using DES to verify kerberos tickets makes no sense */
+ 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;
+
+ 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;
+ }
+
+ 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;
+ }
+ 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 */
return NT_STATUS_INVALID_PARAMETER;
}
default:
diff --git a/source/samba4-skip b/source/samba4-skip
index 35b274f..b1313ad 100644
--- a/source/samba4-skip
+++ b/source/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
diff --git a/source/torture/rpc/remote_pac.c b/source/torture/rpc/remote_pac.c
index 58c8ba0..6419e40 100644
--- a/source/torture/rpc/remote_pac.c
+++ b/source/torture/rpc/remote_pac.c
@@ -68,6 +68,8 @@ static bool test_PACVerify(struct torture_context *tctx,
TALLOC_CTX *tmp_ctx = talloc_new(tctx);
+ int i;
+
torture_assert(tctx, tmp_ctx != NULL, "talloc_new() failed");
if (!test_SetupCredentials2(p, tctx, NETLOGON_NEG_AUTH2_ADS_FLAGS,
@@ -157,6 +159,9 @@ static bool test_PACVerify(struct torture_context *tctx,
torture_assert(tctx, (creds->negotiate_flags & NETLOGON_NEG_ARCFOUR), "not willing to even try a PACValidate without RC4 encryption");
creds_arcfour_crypt(creds, pac_wrapped.data, pac_wrapped.length);
+ generic.length = pac_wrapped.length;
+ generic.data = pac_wrapped.data;
+
/* Validate it over the netlogon pipe */
generic.identity_info.parameter_control = 0;
@@ -167,8 +172,6 @@ static bool test_PACVerify(struct torture_context *tctx,
generic.identity_info.workstation.string = TEST_MACHINE_NAME;
generic.package_name.string = "Kerberos";
- generic.length = pac_wrapped.length;
- generic.data = pac_wrapped.data;
ZERO_STRUCT(auth2);
creds_client_authenticator(creds, &auth);
@@ -184,9 +187,183 @@ static bool test_PACVerify(struct torture_context *tctx,
torture_assert_ntstatus_ok(tctx, status, "LogonSamLogon failed");
+ /* This will break the signature nicely (even in the crypto wrapping), check we get a logon failure */
+ generic.data[generic.length-1]++;
+
+ ZERO_STRUCT(auth2);
+ creds_client_authenticator(creds, &auth);
+ r.in.credential = &auth;
+ r.in.return_authenticator = &auth2;
+ r.in.logon_level = NetlogonGenericInformation;
+ r.in.logon.generic = &generic;
+ r.in.server_name = talloc_asprintf(tctx, "\\\\%s", dcerpc_server_name(p));
+ r.in.computer_name = cli_credentials_get_workstation(credentials);
+ r.in.validation_level = NetlogonValidationGenericInfo2;
+
+ status = dcerpc_netr_LogonSamLogon(p, tctx, &r);
+
+ torture_assert_ntstatus_equal(tctx, status, NT_STATUS_LOGON_FAILURE, "LogonSamLogon failed");
+
+ torture_assert(tctx, creds_client_check(creds, &r.out.return_authenticator->cred),
+ "Credential chaining failed");
+
+ /* This will break message type, check that however we still get NT_STATUS_OK */
+ for (i=0; i < 256; i++) {
+ pac_wrapped_struct.MessageType = i;
+ pac_wrapped_struct.ChecksumLength = session_info->server_info->pac_srv_sig.signature.length;
+ pac_wrapped_struct.SignatureType = session_info->server_info->pac_kdc_sig.type;
+ pac_wrapped_struct.SignatureLength = session_info->server_info->pac_kdc_sig.signature.length;
+ pac_wrapped_struct.ChecksumAndSignature = payload
+ = data_blob_talloc(tmp_ctx, NULL,
+ pac_wrapped_struct.ChecksumLength
+ + pac_wrapped_struct.SignatureLength);
+ memcpy(&payload.data[0],
+ session_info->server_info->pac_srv_sig.signature.data,
+ pac_wrapped_struct.ChecksumLength);
+ memcpy(&payload.data[pac_wrapped_struct.ChecksumLength],
+ session_info->server_info->pac_kdc_sig.signature.data,
+ pac_wrapped_struct.SignatureLength);
+
+ ndr_err = ndr_push_struct_blob(&pac_wrapped, tmp_ctx, lp_iconv_convenience(tctx->lp_ctx), &pac_wrapped_struct,
+ (ndr_push_flags_fn_t)ndr_push_PAC_Validate);
+ torture_assert(tctx, NDR_ERR_CODE_IS_SUCCESS(ndr_err), "ndr_push_struct_blob of PACValidate structure failed");
+
+ torture_assert(tctx, (creds->negotiate_flags & NETLOGON_NEG_ARCFOUR), "not willing to even try a PACValidate without RC4 encryption");
+ creds_arcfour_crypt(creds, pac_wrapped.data, pac_wrapped.length);
+
+ generic.length = pac_wrapped.length;
+ generic.data = pac_wrapped.data;
+
+ ZERO_STRUCT(auth2);
--
Samba Shared Repository
More information about the samba-cvs
mailing list