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-rw-r--r--source4/auth/gensec/gensec_gssapi.c17
-rw-r--r--source4/auth/gensec/gensec_krb5.c53
-rw-r--r--source4/auth/kerberos/clikrb5.c114
-rw-r--r--source4/auth/kerberos/kerberos.h3
4 files changed, 140 insertions, 47 deletions
diff --git a/source4/auth/gensec/gensec_gssapi.c b/source4/auth/gensec/gensec_gssapi.c
index 97543de445..42141e4df2 100644
--- a/source4/auth/gensec/gensec_gssapi.c
+++ b/source4/auth/gensec/gensec_gssapi.c
@@ -822,6 +822,8 @@ static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_securi
time_t authtime;
krb5_principal principal;
char *principal_string;
+ DATA_BLOB pac_blob;
+ DATA_BLOB unwrapped_pac;
if ((gensec_gssapi_state->gss_oid->length != gss_mech_krb5->length)
|| (memcmp(gensec_gssapi_state->gss_oid->elements, gss_mech_krb5->elements,
@@ -866,12 +868,19 @@ static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_securi
KRB5_AUTHDATA_IF_RELEVANT,
&pac);
}
+
+ if (maj_stat == 0) {
+ pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
+ gss_release_buffer(&min_stat, &pac);
+
+ if (!unwrap_pac(mem_ctx, &pac_blob, &unwrapped_pac)) {
+ /* No pac actually present */
+ maj_stat = 1;
+ }
+ }
if (maj_stat == 0) {
krb5_error_code ret;
- DATA_BLOB pac_blob = data_blob_talloc(mem_ctx, pac.value, pac.length);
- pac_blob = unwrap_pac(mem_ctx, &pac_blob);
- gss_release_buffer(&min_stat, &pac);
ret = krb5_parse_name(gensec_gssapi_state->smb_krb5_context->krb5_context,
principal_string, &principal);
@@ -881,7 +890,7 @@ static NTSTATUS gensec_gssapi_session_info(struct gensec_security *gensec_securi
}
/* decode and verify the pac */
- nt_status = kerberos_pac_logon_info(mem_ctx, &logon_info, pac_blob,
+ nt_status = kerberos_pac_logon_info(mem_ctx, &logon_info, unwrapped_pac,
gensec_gssapi_state->smb_krb5_context->krb5_context,
NULL, keyblock, principal, authtime);
krb5_free_principal(gensec_gssapi_state->smb_krb5_context->krb5_context, principal);
diff --git a/source4/auth/gensec/gensec_krb5.c b/source4/auth/gensec/gensec_krb5.c
index eff30bbfd1..5297a1d964 100644
--- a/source4/auth/gensec/gensec_krb5.c
+++ b/source4/auth/gensec/gensec_krb5.c
@@ -471,7 +471,7 @@ static NTSTATUS gensec_krb5_session_key(struct gensec_security *gensec_security,
static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security,
struct auth_session_info **_session_info)
{
- NTSTATUS nt_status;
+ NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
struct gensec_krb5_state *gensec_krb5_state = gensec_security->private_data;
struct auth_serversupplied_info *server_info = NULL;
struct auth_session_info *session_info = NULL;
@@ -479,45 +479,44 @@ static NTSTATUS gensec_krb5_session_info(struct gensec_security *gensec_security
krb5_const_principal client_principal;
- DATA_BLOB pac_wrapped;
DATA_BLOB pac;
+ BOOL got_auth_data;
+
TALLOC_CTX *mem_ctx = talloc_new(gensec_security);
if (!mem_ctx) {
return NT_STATUS_NO_MEMORY;
}
-
- pac_wrapped = get_auth_data_from_tkt(mem_ctx, gensec_krb5_state->ticket);
-
- pac = unwrap_pac(mem_ctx, &pac_wrapped);
-
- client_principal = get_principal_from_tkt(gensec_krb5_state->ticket);
-
- /* decode and verify the pac */
- nt_status = kerberos_pac_logon_info(gensec_krb5_state, &logon_info, pac,
- gensec_krb5_state->smb_krb5_context->krb5_context,
- NULL, gensec_krb5_state->keyblock,
- client_principal,
- gensec_krb5_state->ticket->ticket.authtime);
+
+ got_auth_data = get_auth_data_from_tkt(mem_ctx, &pac, gensec_krb5_state->ticket);
/* IF we have the PAC - otherwise we need to get this
* data from elsewere - local ldb, or (TODO) lookup of some
* kind...
- *
- * when heimdal can generate the PAC, we should fail if there's
- * no PAC present
*/
+ if (got_auth_data) {
- if (NT_STATUS_IS_OK(nt_status)) {
- union netr_Validation validation;
- validation.sam3 = &logon_info->info3;
- nt_status = make_server_info_netlogon_validation(gensec_krb5_state,
- NULL,
- 3, &validation,
- &server_info);
+ client_principal = get_principal_from_tkt(gensec_krb5_state->ticket);
+
+ /* decode and verify the pac */
+ nt_status = kerberos_pac_logon_info(gensec_krb5_state, &logon_info, pac,
+ gensec_krb5_state->smb_krb5_context->krb5_context,
+ NULL, gensec_krb5_state->keyblock,
+ client_principal,
+ gensec_krb5_state->ticket->ticket.authtime);
+ if (NT_STATUS_IS_OK(nt_status)) {
+ union netr_Validation validation;
+ validation.sam3 = &logon_info->info3;
+ nt_status = make_server_info_netlogon_validation(gensec_krb5_state,
+ NULL,
+ 3, &validation,
+ &server_info);
+ }
talloc_free(mem_ctx);
- NT_STATUS_NOT_OK_RETURN(nt_status);
- } else {
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ /* NO pac, or can't parse or verify it */
krb5_error_code ret;
DATA_BLOB user_sess_key = data_blob(NULL, 0);
DATA_BLOB lm_sess_key = data_blob(NULL, 0);
diff --git a/source4/auth/kerberos/clikrb5.c b/source4/auth/kerberos/clikrb5.c
index eff558a37b..17a1e5f3d4 100644
--- a/source4/auth/kerberos/clikrb5.c
+++ b/source4/auth/kerberos/clikrb5.c
@@ -4,7 +4,8 @@
Copyright (C) Andrew Tridgell 2001
Copyright (C) Luke Howard 2002-2003
Copyright (C) Andrew Bartlett <abartlet@samba.org> 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
@@ -25,6 +26,7 @@
#include "system/kerberos.h"
#include "system/time.h"
#include "auth/kerberos/kerberos.h"
+#include "asn_1.h"
#ifdef HAVE_KRB5
@@ -157,23 +159,107 @@
}
#endif
- DATA_BLOB get_auth_data_from_tkt(TALLOC_CTX *mem_ctx,
- krb5_ticket *tkt)
+BOOL unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
{
- DATA_BLOB auth_data = data_blob(NULL, 0);
+ DATA_BLOB pac_contents;
+ struct 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;
+}
+
+ BOOL get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
+{
+ DATA_BLOB auth_data_wrapped;
+ BOOL got_auth_data_pac = False;
+ int i;
+
#if defined(HAVE_KRB5_TKT_ENC_PART2)
- if (tkt && tkt->enc_part2
- && tkt->enc_part2->authorization_data
- && tkt->enc_part2->authorization_data[0]
- && tkt->enc_part2->authorization_data[0]->length)
- auth_data = data_blob(tkt->enc_part2->authorization_data[0]->contents,
- tkt->enc_part2->authorization_data[0]->length);
+ if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
+ tkt->enc_part2->authorization_data[0] &&
+ tkt->enc_part2->authorization_data[0]->length)
+ {
+ for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
+
+ if (tkt->enc_part2->authorization_data[i]->ad_type !=
+ KRB5_AUTHDATA_IF_RELEVANT) {
+ DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
+ tkt->enc_part2->authorization_data[i]->ad_type));
+ continue;
+ }
+
+ auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
+ tkt->enc_part2->authorization_data[i]->length);
+
+ /* check if it is a PAC */
+ got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
+ data_blob_free(&auth_data_wrapped);
+
+ if (!got_auth_data_pac) {
+ continue;
+ }
+ }
+
+ return got_auth_data_pac;
+ }
+
#else
- if (tkt && tkt->ticket.authorization_data && tkt->ticket.authorization_data->len)
- auth_data = data_blob(tkt->ticket.authorization_data->val->ad_data.data,
- tkt->ticket.authorization_data->val->ad_data.length);
+ if (tkt->ticket.authorization_data &&
+ tkt->ticket.authorization_data->len)
+ {
+ for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
+
+ if (tkt->ticket.authorization_data->val[i].ad_type !=
+ KRB5_AUTHDATA_IF_RELEVANT) {
+ DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
+ tkt->ticket.authorization_data->val[i].ad_type));
+ continue;
+ }
+
+ auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
+ tkt->ticket.authorization_data->val[i].ad_data.length);
+
+ /* check if it is a PAC */
+ got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
+ data_blob_free(&auth_data_wrapped);
+
+ if (!got_auth_data_pac) {
+ continue;
+ }
+ }
+
+ return got_auth_data_pac;
+ }
#endif
- return auth_data;
+ return False;
}
krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
diff --git a/source4/auth/kerberos/kerberos.h b/source4/auth/kerberos/kerberos.h
index 13a82b0575..f52c32f0c4 100644
--- a/source4/auth/kerberos/kerberos.h
+++ b/source4/auth/kerberos/kerberos.h
@@ -85,8 +85,7 @@ krb5_error_code ads_krb5_mk_req(krb5_context context,
const char *principal,
krb5_ccache ccache,
krb5_data *outbuf);
-DATA_BLOB get_auth_data_from_tkt(TALLOC_CTX *mem_ctx,
- krb5_ticket *tkt);
+BOOL get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt);
NTSTATUS ads_verify_ticket(TALLOC_CTX *mem_ctx,
struct smb_krb5_context *smb_krb5_context,
krb5_auth_context *auth_context,
generated by cgit (git 2.34.1) at 2024-12-04 17:22:29 +0000