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-rw-r--r--source3/libads/authdata.c189
1 files changed, 167 insertions, 22 deletions
diff --git a/source3/libads/authdata.c b/source3/libads/authdata.c
index 44279a24d7..5a8ca28b14 100644
--- a/source3/libads/authdata.c
+++ b/source3/libads/authdata.c
@@ -26,15 +26,90 @@
#include "librpc/gen_ndr/ndr_krb5pac.h"
#include "smb_krb5.h"
#include "libads/kerberos_proto.h"
+#include "auth/common_auth.h"
+#include "lib/param/param.h"
+#include "librpc/crypto/gse.h"
+#include "auth/gensec/gensec.h"
+#include "../libcli/auth/spnego.h"
#ifdef HAVE_KRB5
+struct smb_krb5_context;
+
/****************************************************************
-Given a username, password and other details, return the
-PAC_LOGON_INFO (the structure containing the important user
-information such as groups).
+Callback to get the PAC_LOGON_INFO from the blob
****************************************************************/
+static NTSTATUS kerberos_fetch_pac(struct auth4_context *auth_ctx,
+ TALLOC_CTX *mem_ctx,
+ struct smb_krb5_context *smb_krb5_context,
+ DATA_BLOB *pac_blob,
+ const char *princ_name,
+ const struct tsocket_address *remote_address,
+ uint32_t session_info_flags,
+ struct auth_session_info **session_info)
+{
+ TALLOC_CTX *tmp_ctx;
+ struct PAC_DATA *pac_data = NULL;
+ struct PAC_LOGON_INFO *logon_info = NULL;
+ unsigned int i;
+ NTSTATUS status = NT_STATUS_INTERNAL_ERROR;
+
+ tmp_ctx = talloc_new(mem_ctx);
+ if (!tmp_ctx) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (pac_blob) {
+ status = kerberos_decode_pac(tmp_ctx,
+ *pac_blob,
+ NULL, NULL, NULL, NULL, 0, &pac_data);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto done;
+ }
+
+ /* get logon name and logon info */
+ for (i = 0; i < pac_data->num_buffers; i++) {
+ struct PAC_BUFFER *data_buf = &pac_data->buffers[i];
+
+ switch (data_buf->type) {
+ case PAC_TYPE_LOGON_INFO:
+ if (!data_buf->info) {
+ break;
+ }
+ logon_info = data_buf->info->logon_info.info;
+ break;
+ default:
+ break;
+ }
+ }
+ if (!logon_info) {
+ DEBUG(1, ("Invalid PAC data, missing logon info!\n"));
+ status = NT_STATUS_NOT_FOUND;
+ goto done;
+ }
+ }
+ talloc_set_name_const(logon_info, "struct PAC_LOGON_INFO");
+
+ auth_ctx->private_data = talloc_steal(auth_ctx, logon_info);
+ *session_info = talloc_zero(mem_ctx, struct auth_session_info);
+ if (!*session_info) {
+ status = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+ status = NT_STATUS_OK;
+
+done:
+ TALLOC_FREE(tmp_ctx);
+ return status;
+}
+
+/*
+ * Given the username/password, do a kinit, store the ticket in
+ * cache_name if specified, and return the PAC_LOGON_INFO (the
+ * structure containing the important user information such as
+ * groups).
+ */
NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
const char *name,
const char *pass,
@@ -46,20 +121,29 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
bool add_netbios_addr,
time_t renewable_time,
const char *impersonate_princ_s,
- struct PAC_LOGON_INFO **logon_info)
+ struct PAC_LOGON_INFO **_logon_info)
{
krb5_error_code ret;
NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
- DATA_BLOB tkt, ap_rep, sesskey1, sesskey2;
- char *client_princ_out = NULL;
+ DATA_BLOB tkt, tkt_wrapped, ap_rep, sesskey1;
const char *auth_princ = NULL;
const char *local_service = NULL;
const char *cc = "MEMORY:kerberos_return_pac";
+ struct auth_session_info *session_info;
+ struct gensec_security *gensec_server_context;
+
+ struct gensec_settings *gensec_settings;
+ size_t idx = 0;
+ struct auth4_context *auth_context;
+ struct loadparm_context *lp_ctx;
+ struct PAC_LOGON_INFO *logon_info = NULL;
+
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
ZERO_STRUCT(tkt);
ZERO_STRUCT(ap_rep);
ZERO_STRUCT(sesskey1);
- ZERO_STRUCT(sesskey2);
if (!name || !pass) {
return NT_STATUS_INVALID_PARAMETER;
@@ -137,28 +221,92 @@ NTSTATUS kerberos_return_pac(TALLOC_CTX *mem_ctx,
status = krb5_to_nt_status(ret);
goto out;
}
- status = ads_verify_ticket(mem_ctx,
- lp_realm(),
- time_offset,
- &tkt,
- &client_princ_out,
- logon_info,
- &ap_rep,
- &sesskey2,
- False);
+
+ /* wrap that up in a nice GSS-API wrapping */
+ tkt_wrapped = spnego_gen_krb5_wrap(tmp_ctx, tkt, TOK_ID_KRB_AP_REQ);
+ if (tkt_wrapped.data == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto out;
+ }
+
+ auth_context = talloc_zero(tmp_ctx, struct auth4_context);
+ if (auth_context == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto out;
+ }
+ auth_context->generate_session_info_pac = kerberos_fetch_pac;
+
+ lp_ctx = loadparm_init_s3(tmp_ctx, loadparm_s3_context());
+ if (lp_ctx == NULL) {
+ status = NT_STATUS_INVALID_SERVER_STATE;
+ DEBUG(10, ("loadparm_init_s3 failed\n"));
+ goto out;
+ }
+
+ gensec_settings = lpcfg_gensec_settings(tmp_ctx, lp_ctx);
+ if (lp_ctx == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ DEBUG(10, ("lpcfg_gensec_settings failed\n"));
+ goto out;
+ }
+
+ gensec_settings->backends = talloc_zero_array(gensec_settings,
+ struct gensec_security_ops *, 2);
+ if (gensec_settings->backends == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto out;
+ }
+
+ gensec_init();
+
+ gensec_settings->backends[idx++] = &gensec_gse_krb5_security_ops;
+
+ status = gensec_server_start(tmp_ctx, gensec_settings,
+ auth_context, &gensec_server_context);
+
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1,("ads_verify_ticket failed: %s\n",
- nt_errstr(status)));
+ DEBUG(1, (__location__ "Failed to start server-side GENSEC to validate a Kerberos ticket: %s\n", nt_errstr(status)));
goto out;
}
- if (!*logon_info) {
+ talloc_unlink(tmp_ctx, lp_ctx);
+ talloc_unlink(tmp_ctx, gensec_settings);
+ talloc_unlink(tmp_ctx, auth_context);
+
+ status = gensec_start_mech_by_oid(gensec_server_context, GENSEC_OID_KERBEROS5);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, (__location__ "Failed to start server-side GENSEC krb5 to validate a Kerberos ticket: %s\n", nt_errstr(status)));
+ goto out;
+ }
+
+ /* Do a client-server update dance */
+ status = gensec_update(gensec_server_context, tmp_ctx, NULL, tkt_wrapped, &ap_rep);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("gensec_update() failed: %s\n", nt_errstr(status)));
+ goto out;
+ }
+
+ /* Now return the PAC information to the callers. We ingore
+ * the session_info and instead pick out the PAC via the
+ * private_data on the auth_context */
+ status = gensec_session_info(gensec_server_context, tmp_ctx, &session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Unable to obtain PAC via gensec_session_info\n"));
+ goto out;
+ }
+
+ logon_info = talloc_get_type_abort(gensec_server_context->auth_context->private_data,
+ struct PAC_LOGON_INFO);
+ if (logon_info == NULL) {
DEBUG(1,("no PAC\n"));
status = NT_STATUS_INVALID_PARAMETER;
goto out;
}
+ *_logon_info = talloc_move(mem_ctx, &logon_info);
+
out:
+ talloc_free(tmp_ctx);
if (cc != cache_name) {
ads_kdestroy(cc);
}
@@ -166,9 +314,6 @@ out:
data_blob_free(&tkt);
data_blob_free(&ap_rep);
data_blob_free(&sesskey1);
- data_blob_free(&sesskey2);
-
- TALLOC_FREE(client_princ_out);
return status;
}
generated by cgit (git 2.34.1) at 2024-12-26 16:32:23 +0000