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Diffstat (limited to 'source4/auth/kerberos/kerberos_pac.c')
-rw-r--r--source4/auth/kerberos/kerberos_pac.c77
1 files changed, 27 insertions, 50 deletions
diff --git a/source4/auth/kerberos/kerberos_pac.c b/source4/auth/kerberos/kerberos_pac.c
index 8f3d2cd72c..84a7c56cc9 100644
--- a/source4/auth/kerberos/kerberos_pac.c
+++ b/source4/auth/kerberos/kerberos_pac.c
@@ -32,11 +32,12 @@
#include "librpc/gen_ndr/ndr_krb5pac.h"
#include "auth/auth.h"
-#ifdef KRB5_DO_VERIFY_PAC
-static NTSTATUS kerberos_pac_checksum(DATA_BLOB pac_data,
- struct PAC_SIGNATURE_DATA *sig,
- struct smb_krb5_context *smb_krb5_context,
- uint32 keyusage)
+static NTSTATUS kerberos_pac_checksum(TALLOC_CTX *mem_ctx,
+ DATA_BLOB pac_data,
+ struct PAC_SIGNATURE_DATA *sig,
+ struct smb_krb5_context *smb_krb5_context,
+ krb5_keyblock *keyblock,
+ uint32_t keyusage)
{
krb5_error_code ret;
krb5_crypto crypto;
@@ -49,9 +50,9 @@ static NTSTATUS kerberos_pac_checksum(DATA_BLOB pac_data,
ret = krb5_crypto_init(smb_krb5_context->krb5_context,
- &gensec_krb5_state->keyblock,
- 0,
- &crypto);
+ keyblock,
+ 0,
+ &crypto);
if (ret) {
DEBUG(0,("krb5_crypto_init() failed\n"));
return NT_STATUS_FOOBAR;
@@ -65,10 +66,14 @@ static NTSTATUS kerberos_pac_checksum(DATA_BLOB pac_data,
pac_data.length,
&cksum);
if (!ret) {
- DEBUG(0,("PAC Verified: keyusage: %d\n", keyusage));
+ DEBUG(0, ("PAC Verified: keyusage: %d\n", keyusage));
break;
+ } else {
+ DEBUG(2, ("PAC Verification failed: %s\n",
+ smb_get_krb5_error_message(smb_krb5_context->krb5_context, ret, mem_ctx)));
}
}
+
krb5_crypto_destroy(smb_krb5_context->krb5_context, crypto);
if (ret) {
@@ -80,23 +85,22 @@ static NTSTATUS kerberos_pac_checksum(DATA_BLOB pac_data,
return NT_STATUS_OK;
}
-#endif
-NTSTATUS kerberos_decode_pac(TALLOC_CTX *mem_ctx,
+ NTSTATUS kerberos_decode_pac(TALLOC_CTX *mem_ctx,
struct PAC_LOGON_INFO **logon_info_out,
DATA_BLOB blob,
- struct smb_krb5_context *smb_krb5_context)
+ struct smb_krb5_context *smb_krb5_context,
+ krb5_keyblock *keyblock)
{
NTSTATUS status;
struct PAC_SIGNATURE_DATA srv_sig;
- struct PAC_SIGNATURE_DATA *srv_sig_ptr;
+ struct PAC_SIGNATURE_DATA *srv_sig_ptr = NULL;
struct PAC_SIGNATURE_DATA kdc_sig;
- struct PAC_SIGNATURE_DATA *kdc_sig_ptr;
+ struct PAC_SIGNATURE_DATA *kdc_sig_ptr = NULL;
struct PAC_LOGON_INFO *logon_info = NULL;
struct PAC_DATA pac_data;
-#ifdef KRB5_DO_VERIFY_PAC
- DATA_BLOB tmp_blob = data_blob(NULL, 0);
-#endif
+ DATA_BLOB modified_pac_blob = data_blob_talloc(mem_ctx, blob.data, blob.length);
+ DATA_BLOB tmp_blob;
int i;
status = ndr_pull_struct_blob(&blob, mem_ctx, &pac_data,
@@ -156,39 +160,11 @@ NTSTATUS kerberos_decode_pac(TALLOC_CTX *mem_ctx,
DEBUG(0,("PAC no kdc_key\n"));
return NT_STATUS_FOOBAR;
}
-#ifdef KRB5_DO_VERIFY_PAC
- /* clear the kdc_key */
-/* memset((void *)kdc_sig_ptr , '\0', sizeof(*kdc_sig_ptr));*/
-
- status = ndr_push_struct_blob(&tmp_blob, mem_ctx, &pac_data,
- (ndr_push_flags_fn_t)ndr_push_PAC_DATA);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- status = ndr_pull_struct_blob(&tmp_blob, mem_ctx, &pac_data,
- (ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("can't parse the PAC\n"));
- return status;
- }
- /*NDR_PRINT_DEBUG(PAC_DATA, &pac_data);*/
-
- /* verify by kdc_key */
- status = kerberos_pac_checksum(tmp_blob, &kdc_sig, smb_krb5_context, 0);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
+ memset(&modified_pac_blob.data[modified_pac_blob.length - 48],
+ '\0', 48);
- /* clear the service_key */
-/* memset((void *)srv_sig_ptr , '\0', sizeof(*srv_sig_ptr));*/
-
- status = ndr_push_struct_blob(&tmp_blob, mem_ctx, &pac_data,
- (ndr_push_flags_fn_t)ndr_push_PAC_DATA);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- status = ndr_pull_struct_blob(&tmp_blob, mem_ctx, &pac_data,
+ status = ndr_pull_struct_blob(&modified_pac_blob, mem_ctx, &pac_data,
(ndr_pull_flags_fn_t)ndr_pull_PAC_DATA);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("can't parse the PAC\n"));
@@ -197,12 +173,13 @@ NTSTATUS kerberos_decode_pac(TALLOC_CTX *mem_ctx,
NDR_PRINT_DEBUG(PAC_DATA, &pac_data);
/* verify by servie_key */
- status = kerberos_pac_checksum(tmp_blob, &srv_sig, smb_krb5_context, 0);
+ status = kerberos_pac_checksum(mem_ctx,
+ modified_pac_blob, &srv_sig,
+ smb_krb5_context, keyblock, 0);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
-#endif
DEBUG(0,("account_name: %s [%s]\n",
logon_info->info3.base.account_name.string,
logon_info->info3.base.full_name.string));