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
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 2 of the License, or
+ 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,
#ifdef HAVE_KRB5
-static DATA_BLOB unwrap_pac(DATA_BLOB *auth_data)
+static BOOL pac_io_logon_name(const char *desc, PAC_LOGON_NAME *logon_name,
+ prs_struct *ps, int depth)
{
- DATA_BLOB pac_contents;
- ASN1_DATA data;
- int data_type;
-
- 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);
- 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);
- return pac_contents;
-}
-
-static BOOL pac_io_unknown_type_10(const char *desc, UNKNOWN_TYPE_10 *type_10,
- prs_struct *ps, int depth)
-{
- if (NULL == type_10)
+ if (NULL == logon_name)
return False;
- prs_debug(ps, depth, desc, "pac_io_unknown_type_10");
+ prs_debug(ps, depth, desc, "pac_io_logon_name");
depth++;
- if (!smb_io_time("unknown_time", &type_10->unknown_time, ps, depth))
+ if (!smb_io_time("logon_time", &logon_name->logon_time, ps, depth))
return False;
- if (!prs_uint16("len", ps, depth, &type_10->len))
+ if (!prs_uint16("len", ps, depth, &logon_name->len))
return False;
- if (UNMARSHALLING(ps) && type_10->len) {
- type_10->username = (uint16 *) prs_alloc_mem(ps, type_10->len);
- if (!type_10->username) {
+ /* The following string is always in little endian 16 bit values,
+ copy as 8 bits to avoid endian reversal on big-endian machines.
+ len is the length in bytes. */
+
+ if (UNMARSHALLING(ps) && logon_name->len) {
+ logon_name->username = PRS_ALLOC_MEM(ps, uint8, logon_name->len);
+ if (!logon_name->username) {
DEBUG(3, ("No memory available\n"));
return False;
}
}
- if (!prs_uint16s(True, "name", ps, depth, type_10->username,
- (type_10->len / sizeof(uint16))))
+ if (!prs_uint8s(True, "name", ps, depth, logon_name->username, logon_name->len))
return False;
return True;
-
}
-
+#if 0 /* Unused (handled now in net_io_user_info3()) - Guenther */
static BOOL pac_io_krb_sids(const char *desc, KRB_SID_AND_ATTRS *sid_and_attr,
prs_struct *ps, int depth)
{
depth++;
if (UNMARSHALLING(ps)) {
- sid_and_attr->sid =
- (DOM_SID2 * ) prs_alloc_mem(ps, sizeof(DOM_SID2));
+ sid_and_attr->sid = PRS_ALLOC_MEM(ps, DOM_SID2, 1);
if (!sid_and_attr->sid) {
DEBUG(3, ("No memory available\n"));
return False;
return False;
if (UNMARSHALLING(ps)) {
- array->krb_sid_and_attrs = (KRB_SID_AND_ATTRS *)
- prs_alloc_mem(ps, sizeof(KRB_SID_AND_ATTRS) * num);
- if (!array->krb_sid_and_attrs) {
- DEBUG(3, ("No memory available\n"));
- return False;
+ if (num) {
+ array->krb_sid_and_attrs = PRS_ALLOC_MEM(ps, KRB_SID_AND_ATTRS, num);
+ if (!array->krb_sid_and_attrs) {
+ DEBUG(3, ("No memory available\n"));
+ return False;
+ }
+ } else {
+ array->krb_sid_and_attrs = NULL;
}
}
return True;
}
+#endif
static BOOL pac_io_group_membership(const char *desc,
GROUP_MEMBERSHIP *membership,
return False;
if (UNMARSHALLING(ps)) {
- array->group_membership = (GROUP_MEMBERSHIP *)
- prs_alloc_mem(ps, sizeof(GROUP_MEMBERSHIP) * num);
- if (!array->group_membership) {
- DEBUG(3, ("No memory available\n"));
- return False;
+ if (num) {
+ array->group_membership = PRS_ALLOC_MEM(ps, GROUP_MEMBERSHIP, num);
+ if (!array->group_membership) {
+ DEBUG(3, ("No memory available\n"));
+ return False;
+ }
+ } else {
+ array->group_membership = NULL;
}
}
}
+#if 0 /* Unused, replaced using an expanded net_io_user_info3() now - Guenther */
static BOOL pac_io_pac_logon_info(const char *desc, PAC_LOGON_INFO *info,
prs_struct *ps, int depth)
{
- uint32 garbage;
+ uint32 garbage, i;
+
if (NULL == info)
return False;
prs_debug(ps, depth, desc, "pac_io_pac_logon_info");
depth++;
- if (!prs_uint32("unknown", ps, depth, &garbage))
+ if (!prs_align(ps))
return False;
- if (!prs_uint32("unknown", ps, depth, &garbage))
+ if (!prs_uint32("unknown", ps, depth, &garbage)) /* 00081001 */
+ return False;
+ if (!prs_uint32("unknown", ps, depth, &garbage)) /* cccccccc */
return False;
if (!prs_uint32("bufferlen", ps, depth, &garbage))
return False;
- if (!prs_uint32("bufferlenhi", ps, depth, &garbage))
+ if (!prs_uint32("bufferlenhi", ps, depth, &garbage)) /* 00000000 */
return False;
+
if (!prs_uint32("pointer", ps, depth, &garbage))
return False;
+ if (!prs_align(ps))
+ return False;
if (!smb_io_time("logon_time", &info->logon_time, ps, depth))
return False;
if (!smb_io_time("logoff_time", &info->logoff_time, ps, depth))
if (!prs_uint16("logon_count", ps, depth, &info->logon_count))
return False;
- if (!prs_uint16("reserved12", ps, depth, &info->reserved12))
+ if (!prs_uint16("bad_password_count", ps, depth, &info->bad_password_count))
return False;
if (!prs_uint32("user_rid", ps, depth, &info->user_rid))
return False;
if (!prs_uint32("user_flags", ps, depth, &info->user_flags))
return False;
- if (!prs_uint32("reserved13.0", ps, depth, &info->reserved13[0]))
- return False;
- if (!prs_uint32("reserved13.1", ps, depth, &info->reserved13[1]))
- return False;
- if (!prs_uint32("reserved13.2", ps, depth, &info->reserved13[2]))
- return False;
- if (!prs_uint32("reserved13.3", ps, depth, &info->reserved13[3]))
+ if (!prs_uint8s(False, "session_key", ps, depth, info->session_key, 16))
return False;
if (!smb_io_unihdr("hdr_dom_controller",
if (!prs_uint32("ptr_dom_sid", ps, depth, &info->ptr_dom_sid))
return False;
- if (!prs_uint32("reserved16.0", ps, depth, &info->reserved16[0]))
- return False;
- if (!prs_uint32("reserved16.1", ps, depth, &info->reserved16[1]))
+ if (!prs_uint8s(False, "lm_session_key", ps, depth, info->lm_session_key, 8))
return False;
- /* might be acb_info */
- if (!prs_uint32("reserved17", ps, depth, &info->reserved17))
+ if (!prs_uint32("acct_flags", ps, depth, &info->acct_flags))
return False;
-
- if (!prs_uint32("reserved18.0", ps, depth, &info->reserved18[0]))
- return False;
- if (!prs_uint32("reserved18.1", ps, depth, &info->reserved18[1]))
- return False;
- if (!prs_uint32("reserved18.2", ps, depth, &info->reserved18[2]))
- return False;
- if (!prs_uint32("reserved18.3", ps, depth, &info->reserved18[3]))
- return False;
- if (!prs_uint32("reserved18.4", ps, depth, &info->reserved18[4]))
- return False;
- if (!prs_uint32("reserved18.5", ps, depth, &info->reserved18[5]))
- return False;
- if (!prs_uint32("reserved18.6", ps, depth, &info->reserved18[6]))
- return False;
+ for (i = 0; i < 7; i++)
+ {
+ if (!prs_uint32("unkown", ps, depth, &info->unknown[i])) /* unknown */
+ return False;
+ }
if (!prs_uint32("sid_count", ps, depth, &info->sid_count))
return False;
&info->res_group_dom_sid, ps, depth))
return False;
- if (info->ptr_res_groups)
+ if (info->ptr_res_groups) {
+
+ if (!(info->user_flgs & LOGON_RESOURCE_GROUPS)) {
+ DEBUG(0,("user_flgs attribute does not have LOGON_RESOURCE_GROUPS\n"));
+ /* return False; */
+ }
+
if (!pac_io_group_membership_array("res group membership",
&info->res_groups,
info->res_group_count,
ps, depth))
return False;
+ }
+
+ return True;
+}
+#endif
+
+static BOOL pac_io_pac_logon_info(const char *desc, PAC_LOGON_INFO *info,
+ prs_struct *ps, int depth)
+{
+ uint32 garbage;
+ BOOL kerb_validation_info = True;
+
+ if (NULL == info)
+ return False;
+
+ prs_debug(ps, depth, desc, "pac_io_pac_logon_info");
+ depth++;
+
+ if (!prs_align(ps))
+ return False;
+ if (!prs_uint32("unknown", ps, depth, &garbage)) /* 00081001 */
+ return False;
+ if (!prs_uint32("unknown", ps, depth, &garbage)) /* cccccccc */
+ return False;
+ if (!prs_uint32("bufferlen", ps, depth, &garbage))
+ return False;
+ if (!prs_uint32("bufferlenhi", ps, depth, &garbage)) /* 00000000 */
+ return False;
+
+ if(!net_io_user_info3("", &info->info3, ps, depth, 3, kerb_validation_info))
+ return False;
+
+ if (info->info3.ptr_res_group_dom_sid) {
+ if (!smb_io_dom_sid2("res_group_dom_sid",
+ &info->res_group_dom_sid, ps, depth))
+ return False;
+ }
+
+ if (info->info3.ptr_res_groups) {
+
+ if (!(info->info3.user_flgs & LOGON_RESOURCE_GROUPS)) {
+ DEBUG(0,("user_flgs attribute does not have LOGON_RESOURCE_GROUPS\n"));
+ /* return False; */
+ }
+
+ if (!pac_io_group_membership_array("res group membership",
+ &info->res_groups,
+ info->info3.res_group_count,
+ ps, depth))
+ return False;
+ }
return True;
}
+
static BOOL pac_io_pac_signature_data(const char *desc,
PAC_SIGNATURE_DATA *data, uint32 length,
prs_struct *ps, int depth)
{
- uint32 siglen = length - sizeof(uint32);
- if (NULL == data)
- return False;
+ uint32 siglen = 0;
prs_debug(ps, depth, desc, "pac_io_pac_signature_data");
depth++;
+ if (data == NULL)
+ return False;
+
+ if (!prs_align(ps))
+ return False;
if (!prs_uint32("type", ps, depth, &data->type))
return False;
- if (UNMARSHALLING(ps)) {
- data->signature = prs_alloc_mem(ps, siglen);
- if (!data->signature) {
- DEBUG(3, ("No memory available\n"));
- return False;
+
+ if ( length > sizeof(uint32) )
+ siglen = length - sizeof(uint32);
+
+ if (UNMARSHALLING(ps) && length) {
+ if (siglen) {
+ data->signature.buffer = PRS_ALLOC_MEM(ps, uint8, siglen);
+ if (!data->signature.buffer) {
+ DEBUG(3, ("No memory available\n"));
+ return False;
+ }
+ } else {
+ data->signature.buffer = NULL;
}
}
- if (!prs_uint8s(False, "signature", ps, depth, data->signature,siglen))
+
+ data->signature.buf_len = siglen;
+
+ if (!prs_uint8s(False, "signature", ps, depth, data->signature.buffer, data->signature.buf_len))
return False;
+
return True;
}
-static BOOL pac_io_pac_info_hdr_ctr(const char *desc, PAC_INFO_HDR *hdr,
+static BOOL pac_io_pac_info_hdr_ctr(const char *desc, PAC_BUFFER *hdr,
prs_struct *ps, int depth)
{
if (NULL == hdr)
return False;
if (hdr->offset != prs_offset(ps)) {
- DEBUG(5, ("offset in header(x%x) and data(x%x) do not match\n",
- hdr->offset, prs_offset(ps)));
+ DEBUG(5,("offset in header(x%x) and data(x%x) do not match, correcting\n",
+ hdr->offset, prs_offset(ps)));
prs_set_offset(ps, hdr->offset);
}
if (UNMARSHALLING(ps) && hdr->size > 0) {
- hdr->ctr = (PAC_INFO_CTR *)
- prs_alloc_mem(ps, sizeof(PAC_INFO_CTR));
+ hdr->ctr = PRS_ALLOC_MEM(ps, PAC_INFO_CTR, 1);
if (!hdr->ctr) {
DEBUG(3, ("No memory available\n"));
return False;
case PAC_TYPE_LOGON_INFO:
DEBUG(5, ("PAC_TYPE_LOGON_INFO\n"));
if (UNMARSHALLING(ps))
- hdr->ctr->pac.logon_info = (PAC_LOGON_INFO *)
- prs_alloc_mem(ps, sizeof(PAC_LOGON_INFO));
+ hdr->ctr->pac.logon_info = PRS_ALLOC_MEM(ps, PAC_LOGON_INFO, 1);
if (!hdr->ctr->pac.logon_info) {
DEBUG(3, ("No memory available\n"));
return False;
case PAC_TYPE_SERVER_CHECKSUM:
DEBUG(5, ("PAC_TYPE_SERVER_CHECKSUM\n"));
if (UNMARSHALLING(ps))
- hdr->ctr->pac.srv_cksum = (PAC_SIGNATURE_DATA *)
- prs_alloc_mem(ps, sizeof(PAC_SIGNATURE_DATA));
+ hdr->ctr->pac.srv_cksum = PRS_ALLOC_MEM(ps, PAC_SIGNATURE_DATA, 1);
if (!hdr->ctr->pac.srv_cksum) {
DEBUG(3, ("No memory available\n"));
return False;
case PAC_TYPE_PRIVSVR_CHECKSUM:
DEBUG(5, ("PAC_TYPE_PRIVSVR_CHECKSUM\n"));
if (UNMARSHALLING(ps))
- hdr->ctr->pac.privsrv_cksum = (PAC_SIGNATURE_DATA *)
- prs_alloc_mem(ps, sizeof(PAC_SIGNATURE_DATA));
+ hdr->ctr->pac.privsrv_cksum = PRS_ALLOC_MEM(ps, PAC_SIGNATURE_DATA, 1);
if (!hdr->ctr->pac.privsrv_cksum) {
DEBUG(3, ("No memory available\n"));
return False;
return False;
break;
- case PAC_TYPE_UNKNOWN_10:
- DEBUG(5, ("PAC_TYPE_UNKNOWN_10\n"));
+ case PAC_TYPE_LOGON_NAME:
+ DEBUG(5, ("PAC_TYPE_LOGON_NAME\n"));
if (UNMARSHALLING(ps))
- hdr->ctr->pac.type_10 = (UNKNOWN_TYPE_10 *)
- prs_alloc_mem(ps, sizeof(UNKNOWN_TYPE_10));
- if (!hdr->ctr->pac.type_10) {
+ hdr->ctr->pac.logon_name = PRS_ALLOC_MEM(ps, PAC_LOGON_NAME, 1);
+ if (!hdr->ctr->pac.logon_name) {
DEBUG(3, ("No memory available\n"));
return False;
}
- if (!pac_io_unknown_type_10(desc, hdr->ctr->pac.type_10,
+ if (!pac_io_logon_name(desc, hdr->ctr->pac.logon_name,
ps, depth))
return False;
break;
prs_set_offset(ps, prs_offset(ps) + hdr->size);
}
+#if 0
+ /* obscure pad */
+ if (!prs_uint32("pad", ps, depth, &hdr->pad))
+ return False;
+#endif
return True;
}
-static BOOL pac_io_pac_info_hdr(const char *desc, PAC_INFO_HDR *hdr,
+static BOOL pac_io_pac_info_hdr(const char *desc, PAC_BUFFER *hdr,
prs_struct *ps, int depth)
{
if (NULL == hdr)
return False;
if (UNMARSHALLING(ps) && data->num_buffers > 0) {
- if ((data->pac_info_hdr_ptr = (PAC_INFO_HDR *)
- prs_alloc_mem(ps, sizeof(PAC_INFO_HDR) *
- data->num_buffers)) == NULL) {
+ if ((data->pac_buffer = PRS_ALLOC_MEM(ps, PAC_BUFFER, data->num_buffers)) == NULL) {
return False;
}
}
for (i=0; i<data->num_buffers; i++) {
- if (!pac_io_pac_info_hdr(desc, &data->pac_info_hdr_ptr[i], ps,
+ if (!pac_io_pac_info_hdr(desc, &data->pac_buffer[i], ps,
depth))
return False;
}
for (i=0; i<data->num_buffers; i++) {
- if (!pac_io_pac_info_hdr_ctr(desc, &data->pac_info_hdr_ptr[i],
+ if (!pac_io_pac_info_hdr_ctr(desc, &data->pac_buffer[i],
ps, depth))
return False;
}
return True;
}
-PAC_DATA *decode_pac_data(DATA_BLOB *auth_data, TALLOC_CTX *ctx)
+static NTSTATUS check_pac_checksum(TALLOC_CTX *mem_ctx,
+ DATA_BLOB pac_data,
+ PAC_SIGNATURE_DATA *sig,
+ krb5_context context,
+ 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 NT_STATUS_ACCESS_DENIED;
+ }
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS parse_pac_data(TALLOC_CTX *mem_ctx, DATA_BLOB *pac_data_blob, PAC_DATA *pac_data)
{
- DATA_BLOB pac_data_blob = unwrap_pac(auth_data);
prs_struct ps;
- PAC_DATA *pac_data;
+ PAC_DATA *my_pac;
+
+ if (!prs_init(&ps, pac_data_blob->length, mem_ctx, UNMARSHALL))
+ return NT_STATUS_NO_MEMORY;
+
+ if (!prs_copy_data_in(&ps, (char *)pac_data_blob->data, pac_data_blob->length))
+ return NT_STATUS_INVALID_PARAMETER;
- DEBUG(5,("dump_pac_data\n"));
- prs_init(&ps, pac_data_blob.length, ctx, UNMARSHALL);
- prs_copy_data_in(&ps, pac_data_blob.data, pac_data_blob.length);
prs_set_offset(&ps, 0);
- pac_data = (PAC_DATA *) talloc_zero(ctx, sizeof(PAC_DATA));
- pac_io_pac_data("pac data", pac_data, &ps, 0);
+ my_pac = TALLOC_ZERO_P(mem_ctx, PAC_DATA);
+ if (!pac_io_pac_data("pac data", my_pac, &ps, 0))
+ return NT_STATUS_INVALID_PARAMETER;
prs_mem_free(&ps);
- return pac_data;
+ *pac_data = *my_pac;
+
+ return NT_STATUS_OK;
+}
+
+/* just for debugging, will be removed later - Guenther */
+char *pac_group_attr_string(uint32 attr)
+{
+ fstring name = "";
+
+ if (!attr)
+ return NULL;
+
+ if (attr & SE_GROUP_MANDATORY) fstrcat(name, "SE_GROUP_MANDATORY ");
+ if (attr & SE_GROUP_ENABLED_BY_DEFAULT) fstrcat(name, "SE_GROUP_ENABLED_BY_DEFAULT ");
+ if (attr & SE_GROUP_ENABLED) fstrcat(name, "SE_GROUP_ENABLED ");
+ if (attr & SE_GROUP_OWNER) fstrcat(name, "SE_GROUP_OWNER ");
+ if (attr & SE_GROUP_USE_FOR_DENY_ONLY) fstrcat(name, "SE_GROUP_USE_FOR_DENY_ONLY ");
+ if (attr & SE_GROUP_LOGON_ID) fstrcat(name, "SE_GROUP_LOGON_ID ");
+ if (attr & SE_GROUP_RESOURCE) fstrcat(name, "SE_GROUP_RESOURCE ");
+
+ return SMB_STRDUP(name);
+}
+
+/* just for debugging, will be removed later - Guenther */
+static void dump_pac_logon_info(PAC_LOGON_INFO *logon_info) {
+
+ DOM_SID dom_sid, res_group_dom_sid;
+ int i;
+ char *attr_string;
+ uint32 user_flgs = logon_info->info3.user_flgs;
+
+ if (logon_info->info3.ptr_res_group_dom_sid) {
+ sid_copy(&res_group_dom_sid, &logon_info->res_group_dom_sid.sid);
+ }
+ sid_copy(&dom_sid, &logon_info->info3.dom_sid.sid);
+
+ DEBUG(10,("The PAC:\n"));
+
+ DEBUGADD(10,("\tUser Flags: 0x%x (%d)\n", user_flgs, user_flgs));
+ if (user_flgs & LOGON_EXTRA_SIDS)
+ DEBUGADD(10,("\tUser Flags: LOGON_EXTRA_SIDS 0x%x (%d)\n", LOGON_EXTRA_SIDS, LOGON_EXTRA_SIDS));
+ if (user_flgs & LOGON_RESOURCE_GROUPS)
+ DEBUGADD(10,("\tUser Flags: LOGON_RESOURCE_GROUPS 0x%x (%d)\n", LOGON_RESOURCE_GROUPS, LOGON_RESOURCE_GROUPS));
+ DEBUGADD(10,("\tUser SID: %s-%d\n", sid_string_static(&dom_sid), logon_info->info3.user_rid));
+ DEBUGADD(10,("\tGroup SID: %s-%d\n", sid_string_static(&dom_sid), logon_info->info3.group_rid));
+
+ DEBUGADD(10,("\tGroup Membership (Global and Universal Groups of own domain):\n"));
+ for (i = 0; i < logon_info->info3.num_groups; i++) {
+ attr_string = pac_group_attr_string(logon_info->info3.gids[i].attr);
+ DEBUGADD(10,("\t\t%d: sid: %s-%d\n\t\t attr: 0x%x == %s\n",
+ i, sid_string_static(&dom_sid),
+ logon_info->info3.gids[i].g_rid,
+ logon_info->info3.gids[i].attr,
+ attr_string));
+ SAFE_FREE(attr_string);
+ }
+
+ DEBUGADD(10,("\tGroup Membership (Domain Local Groups and Groups from Trusted Domains):\n"));
+ for (i = 0; i < logon_info->info3.num_other_sids; i++) {
+ attr_string = pac_group_attr_string(logon_info->info3.other_sids_attrib[i]);
+ DEBUGADD(10,("\t\t%d: sid: %s\n\t\t attr: 0x%x == %s\n",
+ i, sid_string_static(&logon_info->info3.other_sids[i].sid),
+ logon_info->info3.other_sids_attrib[i],
+ attr_string));
+ SAFE_FREE(attr_string);
+ }
+
+ DEBUGADD(10,("\tGroup Membership (Ressource Groups (SID History ?)):\n"));
+ for (i = 0; i < logon_info->info3.res_group_count; i++) {
+ attr_string = pac_group_attr_string(logon_info->res_groups.group_membership[i].attrs);
+ DEBUGADD(10,("\t\t%d: sid: %s-%d\n\t\t attr: 0x%x == %s\n",
+ i, sid_string_static(&res_group_dom_sid),
+ logon_info->res_groups.group_membership[i].rid,
+ logon_info->res_groups.group_membership[i].attrs,
+ attr_string));
+ SAFE_FREE(attr_string);
+ }
+}
+
+ NTSTATUS decode_pac_data(TALLOC_CTX *mem_ctx,
+ DATA_BLOB *pac_data_blob,
+ krb5_context context,
+ krb5_keyblock *service_keyblock,
+ krb5_const_principal client_principal,
+ time_t tgs_authtime,
+ PAC_DATA **pac_data)
+
+{
+ DATA_BLOB modified_pac_blob;
+ PAC_DATA *my_pac;
+ NTSTATUS nt_status;
+ krb5_error_code ret;
+ PAC_SIGNATURE_DATA *srv_sig = NULL;
+ PAC_SIGNATURE_DATA *kdc_sig = NULL;
+ PAC_LOGON_NAME *logon_name = NULL;
+ PAC_LOGON_INFO *logon_info = NULL;
+ krb5_principal client_principal_pac = NULL;
+ NTTIME tgs_authtime_nttime;
+ int i, srv_sig_pos = 0, kdc_sig_pos = 0;
+ fstring username;
+
+ *pac_data = NULL;
+
+ my_pac = talloc(mem_ctx, PAC_DATA);
+ if (!my_pac) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ nt_status = parse_pac_data(mem_ctx, pac_data_blob, my_pac);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(0,("decode_pac_data: failed to parse PAC\n"));
+ return nt_status;
+ }
+
+ modified_pac_blob = data_blob_talloc(mem_ctx, pac_data_blob->data, pac_data_blob->length);
+
+ if (my_pac->num_buffers < 4) {
+ nt_status = NT_STATUS_INVALID_PARAMETER;
+ goto out;
+ }
+
+ /* store signatures */
+ for (i=0; i < my_pac->num_buffers; i++) {
+
+ switch (my_pac->pac_buffer[i].type) {
+
+ case PAC_TYPE_SERVER_CHECKSUM:
+ if (!my_pac->pac_buffer[i].ctr->pac.srv_cksum) {
+ break;
+ }
+
+ srv_sig = my_pac->pac_buffer[i].ctr->pac.srv_cksum;
+
+ /* get position of signature buffer */
+ srv_sig_pos = my_pac->pac_buffer[i].offset;
+ srv_sig_pos += sizeof(uint32);
+
+ break;
+
+ case PAC_TYPE_PRIVSVR_CHECKSUM:
+ if (!my_pac->pac_buffer[i].ctr->pac.privsrv_cksum) {
+ break;
+ }
+
+ kdc_sig = my_pac->pac_buffer[i].ctr->pac.privsrv_cksum;
+
+ /* get position of signature buffer */
+ kdc_sig_pos = my_pac->pac_buffer[i].offset;
+ kdc_sig_pos += sizeof(uint32);
+
+ break;
+
+ case PAC_TYPE_LOGON_NAME:
+ if (!my_pac->pac_buffer[i].ctr->pac.logon_name) {
+ break;
+ }
+
+ logon_name = my_pac->pac_buffer[i].ctr->pac.logon_name;
+ break;
+
+ case PAC_TYPE_LOGON_INFO:
+ if (!my_pac->pac_buffer[i].ctr->pac.logon_info) {
+ break;
+ }
+
+ logon_info = my_pac->pac_buffer[i].ctr->pac.logon_info;
+ break;
+ }
+
+ }
+
+ if (!srv_sig || !kdc_sig || !logon_name || !logon_info) {
+ nt_status = NT_STATUS_INVALID_PARAMETER;
+ goto out;
+ }
+
+ /* zero PAC_SIGNATURE_DATA signature buffer */
+ memset(&modified_pac_blob.data[srv_sig_pos], '\0', srv_sig->signature.buf_len);
+ memset(&modified_pac_blob.data[kdc_sig_pos], '\0', kdc_sig->signature.buf_len);
+
+ /* check server signature */
+ nt_status = check_pac_checksum(mem_ctx, modified_pac_blob, srv_sig, context, service_keyblock);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(0,("decode_pac_data: failed to verify PAC server signature\n"));
+ goto out;
+ }
+
+ /* Convert to NT time, so as not to loose accuracy in comparison */
+ unix_to_nt_time(&tgs_authtime_nttime, tgs_authtime);
+
+ if (!nt_time_equals(&tgs_authtime_nttime, &logon_name->logon_time)) {
+
+ DEBUG(2,("decode_pac_data: Logon time mismatch between ticket and PAC!\n"));
+ DEBUGADD(2, ("decode_pac_data: PAC: %s\n",
+ http_timestring(nt_time_to_unix(logon_name->logon_time))));
+ DEBUGADD(2, ("decode_pac_data: Ticket: %s\n",
+ http_timestring(nt_time_to_unix(tgs_authtime_nttime))));
+
+ nt_status = NT_STATUS_ACCESS_DENIED;
+ goto out;
+ }
+
+ if (!logon_name->len) {
+ DEBUG(2,("decode_pac_data: No Logon Name available\n"));
+ nt_status = NT_STATUS_INVALID_PARAMETER;
+ goto out;
+ }
+ rpcstr_pull(username, logon_name->username, sizeof(username), logon_name->len, 0);
+
+ ret = smb_krb5_parse_name_norealm(context, username, &client_principal_pac);
+ if (ret) {
+ DEBUG(2,("decode_pac_data: Could not parse name from incoming PAC: [%s]: %s\n",
+ username, error_message(ret)));
+ nt_status = NT_STATUS_INVALID_PARAMETER;
+ goto out;
+ }
+
+ if (!smb_krb5_principal_compare_any_realm(context, client_principal, client_principal_pac)) {
+ DEBUG(2,("decode_pac_data: Name in PAC [%s] does not match principal name in ticket\n",
+ username));
+ nt_status = NT_STATUS_ACCESS_DENIED;
+ goto out;
+ }
+
+ DEBUG(10,("Successfully validated Kerberos PAC\n"));
+
+ dump_pac_logon_info(logon_info);
+
+ *pac_data = my_pac;
+
+ nt_status = NT_STATUS_OK;
+
+out:
+ if (client_principal_pac) {
+ krb5_free_principal(context, client_principal_pac);
+ }
+
+ return nt_status;
+}
+
+ PAC_LOGON_INFO *get_logon_info_from_pac(PAC_DATA *pac_data)
+{
+ PAC_LOGON_INFO *logon_info = NULL;
+ int i;
+
+ for (i=0; i < pac_data->num_buffers; i++) {
+
+ if (pac_data->pac_buffer[i].type != PAC_TYPE_LOGON_INFO)
+ continue;
+
+ logon_info = pac_data->pac_buffer[i].ctr->pac.logon_info;
+ break;
+ }
+ return logon_info;
}
#endif
git.samba.org / jra / samba / .git / blobdiff