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-rw-r--r--source3/libads/authdata.c317
-rw-r--r--source3/libads/kerberos_verify.c6
2 files changed, 3 insertions, 320 deletions
diff --git a/source3/libads/authdata.c b/source3/libads/authdata.c
index 0d877ddef8..6f49b857da 100644
--- a/source3/libads/authdata.c
+++ b/source3/libads/authdata.c
@@ -30,323 +30,6 @@
#ifdef HAVE_KRB5
/****************************************************************
-****************************************************************/
-
-static krb5_error_code check_pac_checksum(TALLOC_CTX *mem_ctx,
- DATA_BLOB pac_data,
- struct 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 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 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,
- 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_ZERO_P(mem_ctx, struct PAC_DATA);
- pac_data_raw = TALLOC_ZERO_P(mem_ctx, struct PAC_DATA_RAW);
- kdc_sig_wipe = TALLOC_ZERO_P(mem_ctx, struct PAC_SIGNATURE_DATA);
- srv_sig_wipe = TALLOC_ZERO_P(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;
- }
-
- /* 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;
- }
-
- /* 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;
- }
-
- 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;
-}
-
-/****************************************************************
Given a username, password and other details, return the
PAC_LOGON_INFO (the structure containing the important user
information such as groups).
diff --git a/source3/libads/kerberos_verify.c b/source3/libads/kerberos_verify.c
index 7eda7fd8dd..fab38dc4de 100644
--- a/source3/libads/kerberos_verify.c
+++ b/source3/libads/kerberos_verify.c
@@ -680,9 +680,9 @@ NTSTATUS ads_verify_ticket(TALLOC_CTX *mem_ctx,
if (got_auth_data) {
struct PAC_DATA *pac_data;
- pac_ret = decode_pac_data(mem_ctx, &auth_data, context,
- keyblock, client_principal,
- authtime, &pac_data);
+ pac_ret = kerberos_decode_pac(mem_ctx, auth_data, context,
+ NULL, keyblock, client_principal,
+ authtime, &pac_data);
data_blob_free(&auth_data);
if (!NT_STATUS_IS_OK(pac_ret)) {
DEBUG(3, (__location__ ": failed to decode "