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authorSimo Sorce <idra@samba.org>2010-08-20 04:45:56 -0400
committerGünther Deschner <gd@samba.org>2010-08-30 14:32:33 +0200
commite6ed1dc249f6a1a536efcd7519bc9d9bd5c180dd (patch)
treedd8e7207f658f297eecb6999238e753066f2cc2a
parentb31f75d8f6dbfcad4438262eeb3ecda165f72fae (diff)
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dcerpc-gssapi: add initial server side code
Signed-off-by: Günther Deschner <gd@samba.org>
-rw-r--r--source3/librpc/rpc/dcerpc_gssapi.c227
-rw-r--r--source3/librpc/rpc/dcerpc_gssapi.h14
2 files changed, 229 insertions, 12 deletions
diff --git a/source3/librpc/rpc/dcerpc_gssapi.c b/source3/librpc/rpc/dcerpc_gssapi.c
index f2c657cd4c..e8a15b8e8b 100644
--- a/source3/librpc/rpc/dcerpc_gssapi.c
+++ b/source3/librpc/rpc/dcerpc_gssapi.c
@@ -1,6 +1,6 @@
/*
* GSSAPI Security Extensions
- * RPC Pipe client routines
+ * RPC Pipe client and server routines
* Copyright (C) Simo Sorce 2010.
*
* This program is free software; you can redistribute it and/or modify
@@ -22,7 +22,10 @@
#include "includes.h"
#include "dcerpc_gssapi.h"
-#if defined(HAVE_GSSAPI_GSSAPI_EXT_H) && defined(HAVE_GSS_WRAP_IOV)
+#if defined(HAVE_KRB5) && defined(HAVE_GSSAPI_GSSAPI_EXT_H) && defined(HAVE_GSS_WRAP_IOV)
+
+#include "smb_krb5.h"
+#include "dcerpc_krb5.h"
#include <gssapi/gssapi.h>
#include <gssapi/gssapi_krb5.h>
@@ -48,18 +51,23 @@ static char *gse_errstr(TALLOC_CTX *mem_ctx, OM_uint32 maj, OM_uint32 min);
struct gse_context {
krb5_context k5ctx;
krb5_ccache ccache;
-
- bool spnego_wrap;
+ krb5_keytab keytab;
gss_ctx_id_t gss_ctx;
- OM_uint32 gss_c_flags;
gss_OID_desc gss_mech;
-
+ OM_uint32 gss_c_flags;
+ gss_cred_id_t creds;
gss_name_t server_name;
- gss_cred_id_t cli_creds;
+ gss_OID ret_mech;
+ OM_uint32 ret_flags;
+ gss_cred_id_t delegated_creds;
+ gss_name_t client_name;
+
+ bool spnego_wrap;
bool more_processing;
+ bool authenticated;
};
/* free non talloc dependent contexts */
@@ -74,6 +82,10 @@ static int gse_context_destructor(void *ptr)
krb5_cc_close(gse_ctx->k5ctx, gse_ctx->ccache);
gse_ctx->ccache = NULL;
}
+ if (gse_ctx->keytab) {
+ krb5_kt_close(gse_ctx->k5ctx, gse_ctx->keytab);
+ gse_ctx->keytab = NULL;
+ }
krb5_free_context(gse_ctx->k5ctx);
gse_ctx->k5ctx = NULL;
}
@@ -86,7 +98,22 @@ static int gse_context_destructor(void *ptr)
gss_maj = gss_release_name(&gss_min,
&gse_ctx->server_name);
}
-
+ if (gse_ctx->client_name) {
+ gss_maj = gss_release_name(&gss_min,
+ &gse_ctx->client_name);
+ }
+ if (gse_ctx->creds) {
+ gss_maj = gss_release_cred(&gss_min,
+ &gse_ctx->creds);
+ }
+ if (gse_ctx->delegated_creds) {
+ gss_maj = gss_release_cred(&gss_min,
+ &gse_ctx->delegated_creds);
+ }
+ if (gse_ctx->ret_mech) {
+ gss_maj = gss_release_oid(&gss_min,
+ &gse_ctx->ret_mech);
+ }
return 0;
}
@@ -231,7 +258,7 @@ NTSTATUS gse_init_client(TALLOC_CTX *mem_ctx,
GSS_C_INDEFINITE,
&mech_set,
GSS_C_INITIATE,
- &gse_ctx->cli_creds,
+ &gse_ctx->creds,
NULL, NULL);
if (gss_maj) {
DEBUG(0, ("gss_acquire_creds failed for %s, with [%s]\n",
@@ -266,7 +293,7 @@ NTSTATUS gse_get_client_auth_token(TALLOC_CTX *mem_ctx,
in_data.length = token_in->length;
gss_maj = gss_init_sec_context(&gss_min,
- gse_ctx->cli_creds,
+ gse_ctx->creds,
&gse_ctx->gss_ctx,
gse_ctx->server_name,
&gse_ctx->gss_mech,
@@ -305,6 +332,160 @@ done:
return status;
}
+NTSTATUS gse_init_server(TALLOC_CTX *mem_ctx,
+ enum dcerpc_AuthType auth_type,
+ enum dcerpc_AuthLevel auth_level,
+ uint32_t add_gss_c_flags,
+ const char *server,
+ const char *keytab_name,
+ struct gse_context **_gse_ctx)
+{
+ struct gse_context *gse_ctx;
+ OM_uint32 gss_maj, gss_min;
+ gss_OID_set_desc mech_set;
+ krb5_error_code ret;
+ const char *ktname;
+ NTSTATUS status;
+
+ status = gse_context_init(mem_ctx, auth_type, auth_level,
+ NULL, add_gss_c_flags, &gse_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (!keytab_name) {
+ ret = smb_krb5_get_server_keytab(gse_ctx->k5ctx,
+ &gse_ctx->keytab);
+ if (ret) {
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+ ret = smb_krb5_keytab_name(gse_ctx, gse_ctx->k5ctx,
+ gse_ctx->keytab, &ktname);
+ if (ret) {
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+ } else {
+ ktname = keytab_name;
+ }
+
+ /* FIXME!!!
+ * This call sets the default keytab for the whole server, not
+ * just for this context. Need to find a way that does not alter
+ * the state of the whole server ... */
+ ret = gsskrb5_register_acceptor_identity(ktname);
+ if (ret) {
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ mech_set.count = 1;
+ mech_set.elements = &gse_ctx->gss_mech;
+
+ gss_maj = gss_acquire_cred(&gss_min,
+ GSS_C_NO_NAME,
+ GSS_C_INDEFINITE,
+ &mech_set,
+ GSS_C_ACCEPT,
+ &gse_ctx->creds,
+ NULL, NULL);
+ if (gss_maj) {
+ DEBUG(0, ("gss_acquire_creds failed with [%s]\n",
+ gse_errstr(gse_ctx, gss_maj, gss_min)));
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ status = NT_STATUS_OK;
+
+done:
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(gse_ctx);
+ }
+
+ *_gse_ctx = gse_ctx;
+ return status;
+}
+
+NTSTATUS gse_get_server_auth_token(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx,
+ DATA_BLOB *token_in,
+ DATA_BLOB *token_out)
+{
+ OM_uint32 gss_maj, gss_min;
+ gss_buffer_desc in_data;
+ gss_buffer_desc out_data;
+ DATA_BLOB blob = data_blob_null;
+ NTSTATUS status;
+
+ in_data.value = token_in->data;
+ in_data.length = token_in->length;
+
+ gss_maj = gss_accept_sec_context(&gss_min,
+ &gse_ctx->gss_ctx,
+ gse_ctx->creds,
+ &in_data,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ &gse_ctx->client_name,
+ &gse_ctx->ret_mech,
+ &out_data,
+ &gse_ctx->ret_flags, NULL,
+ &gse_ctx->delegated_creds);
+ switch (gss_maj) {
+ case GSS_S_COMPLETE:
+ /* we are done with it */
+ gse_ctx->more_processing = false;
+ gse_ctx->authenticated = true;
+ status = NT_STATUS_OK;
+ break;
+ case GSS_S_CONTINUE_NEEDED:
+ /* we will need a third leg */
+ gse_ctx->more_processing = true;
+ /* status = NT_STATUS_MORE_PROCESSING_REQUIRED; */
+ status = NT_STATUS_OK;
+ break;
+ default:
+ DEBUG(0, ("gss_init_sec_context failed with [%s]\n",
+ gse_errstr(talloc_tos(), gss_maj, gss_min)));
+
+ if (gse_ctx->gss_ctx) {
+ gss_delete_sec_context(&gss_min,
+ &gse_ctx->gss_ctx,
+ GSS_C_NO_BUFFER);
+ }
+
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto done;
+ }
+
+ /* we may be told to return nothing */
+ if (out_data.length) {
+ blob = data_blob_talloc(mem_ctx, out_data.value, out_data.length);
+ if (!blob.data) {
+ status = NT_STATUS_NO_MEMORY;
+ }
+ gss_maj = gss_release_buffer(&gss_min, &out_data);
+ }
+
+
+done:
+ *token_out = blob;
+ return status;
+}
+
+NTSTATUS gse_verify_server_auth_flags(struct gse_context *gse_ctx)
+{
+ if (!gse_ctx->authenticated) {
+ return NT_STATUS_INVALID_HANDLE;
+ }
+
+ /* TODO: verify the mech oid identifies KRB5 */
+
+ /* FIXME: implement checks */
+ return NT_STATUS_OK;
+}
+
static char *gse_errstr(TALLOC_CTX *mem_ctx, OM_uint32 maj, OM_uint32 min)
{
OM_uint32 gss_min, gss_maj;
@@ -605,6 +786,30 @@ NTSTATUS gse_get_client_auth_token(TALLOC_CTX *mem_ctx,
return NT_STATUS_NOT_IMPLEMENTED;
}
+NTSTATUS gse_init_server(TALLOC_CTX *mem_ctx,
+ enum dcerpc_AuthType auth_type,
+ enum dcerpc_AuthLevel auth_level,
+ uint32_t add_gss_c_flags,
+ const char *server,
+ const char *keytab,
+ struct gse_context **_gse_ctx)
+{
+ return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS gse_get_server_auth_token(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx,
+ DATA_BLOB *token_in,
+ DATA_BLOB *token_out)
+{
+ return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS gse_verify_server_auth_flags(struct gse_context *gse_ctx)
+{
+ return NT_STATUS_NOT_IMPLEMENTED;
+}
+
bool gse_require_more_processing(struct gse_context *gse_ctx)
{
return false;
@@ -646,4 +851,4 @@ NTSTATUS gse_sigcheck(TALLOC_CTX *mem_ctx, struct gse_context *gse_ctx,
return NT_STATUS_NOT_IMPLEMENTED;
}
-#endif /* HAVE_GSSAPI_EXT_H && HAVE_GSS_WRAP_IOV */
+#endif /* HAVE_KRB5 && HAVE_GSSAPI_EXT_H && HAVE_GSS_WRAP_IOV */
diff --git a/source3/librpc/rpc/dcerpc_gssapi.h b/source3/librpc/rpc/dcerpc_gssapi.h
index 28bf9d1c27..5f5721c0f1 100644
--- a/source3/librpc/rpc/dcerpc_gssapi.h
+++ b/source3/librpc/rpc/dcerpc_gssapi.h
@@ -36,12 +36,24 @@ NTSTATUS gse_init_client(TALLOC_CTX *mem_ctx,
const char *password,
uint32_t add_gss_c_flags,
struct gse_context **_gse_ctx);
-
NTSTATUS gse_get_client_auth_token(TALLOC_CTX *mem_ctx,
struct gse_context *gse_ctx,
DATA_BLOB *token_in,
DATA_BLOB *token_out);
+NTSTATUS gse_init_server(TALLOC_CTX *mem_ctx,
+ enum dcerpc_AuthType auth_type,
+ enum dcerpc_AuthLevel auth_level,
+ uint32_t add_gss_c_flags,
+ const char *server,
+ const char *keytab,
+ struct gse_context **_gse_ctx);
+NTSTATUS gse_get_server_auth_token(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx,
+ DATA_BLOB *token_in,
+ DATA_BLOB *token_out);
+NTSTATUS gse_verify_server_auth_flags(struct gse_context *gse_ctx);
+
bool gse_require_more_processing(struct gse_context *gse_ctx);
DATA_BLOB gse_get_session_key(TALLOC_CTX *mem_ctx,
struct gse_context *gse_ctx);