Implement gpm_wrap_size_limit().

Acked-by: Simo Sorce <simo@redhat.com>

3 files changed, 92 insertions, 0 deletions

diff --git a/proxy/Makefile.am b/proxy/Makefile.am
index c931949..48a787d 100644
--- a/proxy/Makefile.am
+++ b/proxy/Makefile.am
@@ -95,6 +95,7 @@ GP_MECHGLUE_OBJ = \
     src/client/gpm_verify_mic.c \
     src/client/gpm_wrap.c \
     src/client/gpm_unwrap.c \
+    src/client/gpm_wrap_size_limit.c \
     src/client/gpm_common.c
 
 dist_noinst_HEADERS = \
diff --git a/proxy/src/client/gpm_wrap_size_limit.c b/proxy/src/client/gpm_wrap_size_limit.c
new file mode 100644
index 0000000..7c7c445
--- /dev/null
+++ b/proxy/src/client/gpm_wrap_size_limit.c
@@ -0,0 +1,85 @@
+/*
+   GSS-PROXY
+
+   Copyright (C) 2011 Red Hat, Inc.
+   Copyright (C) 2011 Simo Sorce <simo.sorce@redhat.com>
+   Copyright (C) 2012 Guenther Deschner <guenther.deschner@redhat.com>
+
+   Permission is hereby granted, free of charge, to any person obtaining a
+   copy of this software and associated documentation files (the "Software"),
+   to deal in the Software without restriction, including without limitation
+   the rights to use, copy, modify, merge, publish, distribute, sublicense,
+   and/or sell copies of the Software, and to permit persons to whom the
+   Software is furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+   DEALINGS IN THE SOFTWARE.
+*/
+
+#include "gssapi_gpm.h"
+#include "src/gp_conv.h"
+
+OM_uint32 gpm_wrap_size_limit(OM_uint32 *minor_status,
+                              gssx_ctx *context_handle,
+                              int conf_req,
+                              gss_qop_t qop_req,
+                              OM_uint32 size_req,
+                              OM_uint32 *max_size)
+{
+    union gp_rpc_arg uarg;
+    union gp_rpc_res ures;
+    gssx_arg_wrap_size_limit *arg = &uarg.wrap_size_limit;
+    gssx_res_wrap_size_limit *res = &ures.wrap_size_limit;
+    uint32_t ret_min = 0;
+    uint32_t ret_maj = 0;
+    int ret = 0;
+
+    memset(&uarg, 0, sizeof(union gp_rpc_arg));
+    memset(&ures, 0, sizeof(union gp_rpc_res));
+
+    if (!context_handle) {
+        return GSS_S_CALL_INACCESSIBLE_READ;
+    }
+
+    /* format request */
+    arg->context_handle = *context_handle;
+    arg->conf_req = conf_req;
+    arg->qop_state = qop_req;
+    arg->req_output_size = size_req;
+
+    /* execute proxy request */
+    ret = gpm_make_call(GSSX_WRAP_SIZE_LIMIT, &uarg, &ures);
+    if (ret) {
+        ret_maj = GSS_S_FAILURE;
+        ret_min = ret;
+        goto done;
+    }
+
+    /* format reply */
+    if (res->status.major_status) {
+        gpm_save_status(&res->status);
+        ret_min = res->status.minor_status;
+        ret_maj = res->status.major_status;
+        goto done;
+    }
+
+    if (max_size) {
+        *max_size = res->max_input_size;
+    }
+
+done:
+    /* prevent the context handle from being destroyed in gpm_free_xdrs */
+    memset(&arg->context_handle, 0, sizeof(gssx_ctx));
+
+    gpm_free_xdrs(GSSX_WRAP_SIZE_LIMIT, &uarg, &ures);
+    *minor_status = ret_min;
+    return ret_maj;
+}
diff --git a/proxy/src/client/gssapi_gpm.h b/proxy/src/client/gssapi_gpm.h
index 7a605d3..d157f06 100644
--- a/proxy/src/client/gssapi_gpm.h
+++ b/proxy/src/client/gssapi_gpm.h
@@ -209,4 +209,10 @@ OM_uint32 gpm_unwrap(OM_uint32 *minor_status,
                      gss_buffer_t output_message_buffer,
                      int *conf_state,
                      gss_qop_t *qop_state);
+OM_uint32 gpm_wrap_size_limit(OM_uint32 *minor_status,
+                              gssx_ctx *context_handle,
+                              int conf_req,
+                              gss_qop_t qop_req,
+                              OM_uint32 size_req,
+                              OM_uint32 *max_size);
 #endif /* _GSSAPI_GPM_H_ */