#include "gssapiP_eap.h"
+OM_uint32
+gss_wrap_size_limit(OM_uint32 *minor,
+ gss_ctx_id_t ctx,
+ int conf_req_flag,
+ gss_qop_t qop_req,
+ OM_uint32 req_output_size,
+ OM_uint32 *max_input_size)
+{
+ gss_iov_buffer_desc iov[4];
+ OM_uint32 major, overhead;
+
+ iov[0].type = GSS_IOV_BUFFER_TYPE_HEADER;
+ iov[0].buffer.value = NULL;
+ iov[0].buffer.length = 0;
+
+ iov[1].type = GSS_IOV_BUFFER_TYPE_DATA;
+ iov[1].buffer.length = req_output_size;
+ iov[1].buffer.value = NULL;
+
+ iov[2].type = GSS_IOV_BUFFER_TYPE_PADDING;
+ iov[2].buffer.value = NULL;
+ iov[2].buffer.length = 0;
+
+ iov[3].type = GSS_IOV_BUFFER_TYPE_TRAILER;
+ iov[3].buffer.value = NULL;
+ iov[3].buffer.length = 0;
+
+ major = gssEapWrapIovLength(minor, ctx, conf_req_flag, qop_req,
+ NULL, iov, 4);
+ if (GSS_ERROR(major)) {
+ return major;
+ }
+
+ overhead = iov[0].buffer.length + iov[3].buffer.length;
+
+ if (iov[2].buffer.length == 0 && overhead < req_output_size)
+ *max_input_size = req_output_size - overhead;
+ else
+ *max_input_size = 0;
+
+ return GSS_S_COMPLETE;
+}