auth/kerberos Move all the PAC handling functions to auth/kerberos

2 files changed, 1 insertions, 365 deletions

diff --git a/libcli/auth/kerberos_pac.c b/libcli/auth/kerberos_pac.c
deleted file mode 100644
index 79d51b26453..00000000000
--- a/libcli/auth/kerberos_pac.c
+++ /dev/null
@@ -1,364 +0,0 @@
-/*
-   Unix SMB/CIFS implementation.
-   kerberos authorization data (PAC) utility library
-   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
-   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
-   Copyright (C) Andrew Tridgell 2001
-   Copyright (C) Luke Howard 2002-2003
-   Copyright (C) Stefan Metzmacher 2004-2005
-   Copyright (C) Guenther Deschner 2005,2007,2008
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#ifdef HAVE_KRB5
-
-#include "librpc/gen_ndr/ndr_krb5pac.h"
-#include "libcli/auth/krb5_wrap.h"
-
-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_checksum cksum;
-	krb5_keyusage usage = 0;
-
-	smb_krb5_checksum_from_pac_sig(&cksum, sig);
-
-#ifdef HAVE_KRB5_KU_OTHER_CKSUM /* Heimdal */
-	usage = KRB5_KU_OTHER_CKSUM;
-#elif defined(HAVE_KRB5_KEYUSAGE_APP_DATA_CKSUM) /* MIT */
-	usage = KRB5_KEYUSAGE_APP_DATA_CKSUM;
-#else
-#error UNKNOWN_KRB5_KEYUSAGE
-#endif
-
-	ret = smb_krb5_verify_checksum(context,
-				       keyblock,
-				       usage,
-				       &cksum,
-				       pac_data.data,
-				       pac_data.length);
-
-	if (ret) {
-		DEBUG(2,("check_pac_checksum: PAC Verification failed: %s (%d)\n",
-			error_message(ret), ret));
-		return ret;
-	}
-
-	return ret;
-}
-
-/**
-* @brief Decode a blob containing a NDR envoded PAC structure
-*
-* @param mem_ctx	  - The memory context
-* @param pac_data_blob	  - The data blob containing the NDR encoded data
-* @param context	  - The Kerberos Context
-* @param service_keyblock - The Service Key used to verify the checksum
-* @param client_principal - The client principal
-* @param tgs_authtime     - The ticket timestamp
-* @param pac_data_out	  - [out] The decoded PAC
-*
-* @return - A NTSTATUS error code
-*/
-NTSTATUS kerberos_decode_pac(TALLOC_CTX *mem_ctx,
-			     DATA_BLOB pac_data_blob,
-			     krb5_context context,
-			     const krb5_keyblock *krbtgt_keyblock,
-			     const krb5_keyblock *service_keyblock,
-			     krb5_const_principal client_principal,
-			     time_t tgs_authtime,
-			     struct PAC_DATA **pac_data_out)
-{
-	NTSTATUS status;
-	enum ndr_err_code ndr_err;
-	krb5_error_code ret;
-	DATA_BLOB modified_pac_blob;
-
-	NTTIME tgs_authtime_nttime;
-	krb5_principal client_principal_pac = NULL;
-	int i;
-
-	struct PAC_SIGNATURE_DATA *srv_sig_ptr = NULL;
-	struct PAC_SIGNATURE_DATA *kdc_sig_ptr = NULL;
-	struct PAC_SIGNATURE_DATA *srv_sig_wipe = NULL;
-	struct PAC_SIGNATURE_DATA *kdc_sig_wipe = NULL;
-	struct PAC_LOGON_NAME *logon_name = NULL;
-	struct PAC_LOGON_INFO *logon_info = NULL;
-	struct PAC_DATA *pac_data = NULL;
-	struct PAC_DATA_RAW *pac_data_raw = NULL;
-
-	DATA_BLOB *srv_sig_blob = NULL;
-	DATA_BLOB *kdc_sig_blob = NULL;
-
-	bool bool_ret;
-
-	*pac_data_out = NULL;
-
-	pac_data = talloc(mem_ctx, struct PAC_DATA);
-	pac_data_raw = talloc(mem_ctx, struct PAC_DATA_RAW);
-	kdc_sig_wipe = talloc(mem_ctx, struct PAC_SIGNATURE_DATA);
-	srv_sig_wipe = talloc(mem_ctx, struct PAC_SIGNATURE_DATA);
-	if (!pac_data_raw || !pac_data || !kdc_sig_wipe || !srv_sig_wipe) {
-		return NT_STATUS_NO_MEMORY;
-	}
-
-	ndr_err = ndr_pull_struct_blob(&pac_data_blob, pac_data, pac_data,
-		       (ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
-	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		status = ndr_map_error2ntstatus(ndr_err);
-		DEBUG(0,("can't parse the PAC: %s\n",
-			nt_errstr(status)));
-		return status;
-	}
-
-	if (pac_data->num_buffers < 4) {
-		/* we need logon_ingo, service_key and kdc_key */
-		DEBUG(0,("less than 4 PAC buffers\n"));
-		return NT_STATUS_INVALID_PARAMETER;
-	}
-
-	ndr_err = ndr_pull_struct_blob(
-				&pac_data_blob, pac_data_raw, pac_data_raw,
-				(ndr_pull_flags_fn_t)ndr_pull_PAC_DATA_RAW);
-	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		status = ndr_map_error2ntstatus(ndr_err);
-		DEBUG(0,("can't parse the PAC: %s\n",
-			nt_errstr(status)));
-		return status;
-	}
-
-	if (pac_data_raw->num_buffers < 4) {
-		/* we need logon_ingo, service_key and kdc_key */
-		DEBUG(0,("less than 4 PAC buffers\n"));
-		return NT_STATUS_INVALID_PARAMETER;
-	}
-
-	if (pac_data->num_buffers != pac_data_raw->num_buffers) {
-		/* we need logon_ingo, service_key and kdc_key */
-		DEBUG(0, ("misparse! PAC_DATA has %d buffers while "
-			  "PAC_DATA_RAW has %d\n", pac_data->num_buffers,
-			  pac_data_raw->num_buffers));
-		return NT_STATUS_INVALID_PARAMETER;
-	}
-
-	for (i=0; i < pac_data->num_buffers; i++) {
-		struct PAC_BUFFER *data_buf = &pac_data->buffers[i];
-		struct PAC_BUFFER_RAW *raw_buf = &pac_data_raw->buffers[i];
-
-		if (data_buf->type != raw_buf->type) {
-			DEBUG(0, ("misparse! PAC_DATA buffer %d has type "
-				  "%d while PAC_DATA_RAW has %d\n", i,
-				  data_buf->type, raw_buf->type));
-			return NT_STATUS_INVALID_PARAMETER;
-		}
-		switch (data_buf->type) {
-		case PAC_TYPE_LOGON_INFO:
-			if (!data_buf->info) {
-				break;
-			}
-			logon_info = data_buf->info->logon_info.info;
-			break;
-		case PAC_TYPE_SRV_CHECKSUM:
-			if (!data_buf->info) {
-				break;
-			}
-			srv_sig_ptr = &data_buf->info->srv_cksum;
-			srv_sig_blob = &raw_buf->info->remaining;
-			break;
-		case PAC_TYPE_KDC_CHECKSUM:
-			if (!data_buf->info) {
-				break;
-			}
-			kdc_sig_ptr = &data_buf->info->kdc_cksum;
-			kdc_sig_blob = &raw_buf->info->remaining;
-			break;
-		case PAC_TYPE_LOGON_NAME:
-			logon_name = &data_buf->info->logon_name;
-			break;
-		default:
-			break;
-		}
-	}
-
-	if (!logon_info) {
-		DEBUG(0,("PAC no logon_info\n"));
-		return NT_STATUS_INVALID_PARAMETER;
-	}
-
-	if (!logon_name) {
-		DEBUG(0,("PAC no logon_name\n"));
-		return NT_STATUS_INVALID_PARAMETER;
-	}
-
-	if (!srv_sig_ptr || !srv_sig_blob) {
-		DEBUG(0,("PAC no srv_key\n"));
-		return NT_STATUS_INVALID_PARAMETER;
-	}
-
-	if (!kdc_sig_ptr || !kdc_sig_blob) {
-		DEBUG(0,("PAC no kdc_key\n"));
-		return NT_STATUS_INVALID_PARAMETER;
-	}
-
-	/* Find and zero out the signatures,
-	 * as required by the signing algorithm */
-
-	/* We find the data blobs above,
-	 * now we parse them to get at the exact portion we should zero */
-	ndr_err = ndr_pull_struct_blob(
-			kdc_sig_blob, kdc_sig_wipe, kdc_sig_wipe,
-			(ndr_pull_flags_fn_t)ndr_pull_PAC_SIGNATURE_DATA);
-	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		status = ndr_map_error2ntstatus(ndr_err);
-		DEBUG(0,("can't parse the KDC signature: %s\n",
-			nt_errstr(status)));
-		return status;
-	}
-
-	ndr_err = ndr_pull_struct_blob(
-			srv_sig_blob, srv_sig_wipe, srv_sig_wipe,
-			(ndr_pull_flags_fn_t)ndr_pull_PAC_SIGNATURE_DATA);
-	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		status = ndr_map_error2ntstatus(ndr_err);
-		DEBUG(0,("can't parse the SRV signature: %s\n",
-			nt_errstr(status)));
-		return status;
-	}
-
-	/* Now zero the decoded structure */
-	memset(kdc_sig_wipe->signature.data,
-		'\0', kdc_sig_wipe->signature.length);
-	memset(srv_sig_wipe->signature.data,
-		'\0', srv_sig_wipe->signature.length);
-
-	/* and reencode, back into the same place it came from */
-	ndr_err = ndr_push_struct_blob(
-			kdc_sig_blob, pac_data_raw, kdc_sig_wipe,
-			(ndr_push_flags_fn_t)ndr_push_PAC_SIGNATURE_DATA);
-	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		status = ndr_map_error2ntstatus(ndr_err);
-		DEBUG(0,("can't repack the KDC signature: %s\n",
-			nt_errstr(status)));
-		return status;
-	}
-	ndr_err = ndr_push_struct_blob(
-			srv_sig_blob, pac_data_raw, srv_sig_wipe,
-			(ndr_push_flags_fn_t)ndr_push_PAC_SIGNATURE_DATA);
-	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		status = ndr_map_error2ntstatus(ndr_err);
-		DEBUG(0,("can't repack the SRV signature: %s\n",
-			nt_errstr(status)));
-		return status;
-	}
-
-	/* push out the whole structure, but now with zero'ed signatures */
-	ndr_err = ndr_push_struct_blob(
-			&modified_pac_blob, pac_data_raw, pac_data_raw,
-			(ndr_push_flags_fn_t)ndr_push_PAC_DATA_RAW);
-	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		status = ndr_map_error2ntstatus(ndr_err);
-		DEBUG(0,("can't repack the RAW PAC: %s\n",
-			nt_errstr(status)));
-		return status;
-	}
-
-	if (service_keyblock) {
-		/* verify by service_key */
-		ret = check_pac_checksum(mem_ctx,
-					 modified_pac_blob, srv_sig_ptr,
-					 context,
-					 service_keyblock);
-		if (ret) {
-			DEBUG(1, ("PAC Decode: Failed to verify the service "
-				  "signature: %s\n", error_message(ret)));
-			return NT_STATUS_ACCESS_DENIED;
-		}
-
-		if (krbtgt_keyblock) {
-			/* verify the service key checksum by krbtgt_key */
-			ret = check_pac_checksum(mem_ctx,
-						 srv_sig_ptr->signature, kdc_sig_ptr,
-						 context, krbtgt_keyblock);
-			if (ret) {
-				DEBUG(1, ("PAC Decode: Failed to verify the KDC signature: %s\n",
-					  smb_get_krb5_error_message(context, ret, mem_ctx)));
-				return NT_STATUS_ACCESS_DENIED;
-			}
-		}
-	}
-
-	if (tgs_authtime) {
-		/* Convert to NT time, so as not to loose accuracy in comparison */
-		unix_to_nt_time(&tgs_authtime_nttime, tgs_authtime);
-
-		if (tgs_authtime_nttime != logon_name->logon_time) {
-			DEBUG(2, ("PAC Decode: "
-				  "Logon time mismatch between ticket and PAC!\n"));
-			DEBUG(2, ("PAC Decode: PAC: %s\n",
-				  nt_time_string(mem_ctx, logon_name->logon_time)));
-			DEBUG(2, ("PAC Decode: Ticket: %s\n",
-				  nt_time_string(mem_ctx, tgs_authtime_nttime)));
-			return NT_STATUS_ACCESS_DENIED;
-		}
-	}
-
-	if (client_principal) {
-		ret = smb_krb5_parse_name_norealm(context,
-						  logon_name->account_name,
-						  &client_principal_pac);
-		if (ret) {
-			DEBUG(2, ("Could not parse name from PAC: [%s]:%s\n",
-				  logon_name->account_name, error_message(ret)));
-			return NT_STATUS_INVALID_PARAMETER;
-		}
-
-		bool_ret = smb_krb5_principal_compare_any_realm(context,
-								client_principal,
-								client_principal_pac);
-
-		krb5_free_principal(context, client_principal_pac);
-
-		if (!bool_ret) {
-			DEBUG(2, ("Name in PAC [%s] does not match principal name "
-				  "in ticket\n", logon_name->account_name));
-			return NT_STATUS_ACCESS_DENIED;
-		}
-	}
-
-	DEBUG(3,("Found account name from PAC: %s [%s]\n",
-		 logon_info->info3.base.account_name.string,
-		 logon_info->info3.base.full_name.string));
-
-	DEBUG(10,("Successfully validated Kerberos PAC\n"));
-
-	if (DEBUGLEVEL >= 10) {
-		const char *s;
-		s = NDR_PRINT_STRUCT_STRING(mem_ctx, PAC_DATA, pac_data);
-		if (s) {
-			DEBUGADD(10,("%s\n", s));
-		}
-	}
-
-	*pac_data_out = pac_data;
-
-	return NT_STATUS_OK;
-}
-
-#endif
diff --git a/libcli/auth/wscript_build b/libcli/auth/wscript_build
index 262d483e068..ab6ca4f94d8 100644
--- a/libcli/auth/wscript_build
+++ b/libcli/auth/wscript_build
@@ -40,5 +40,5 @@ bld.SAMBA_SUBSYSTEM('SPNEGO_PARSE',
                     deps='asn1util')
 
 bld.SAMBA_SUBSYSTEM('KRB5_WRAP',
-                    source='krb5_wrap.c kerberos_pac.c',
+                    source='krb5_wrap.c',
                     deps='gssapi_krb5 krb5 ndr-krb5pac com_err KRB5_PAC')