--- gvpe/src/util.h	2003/10/16 14:12:00	1.10
+++ gvpe/src/util.h	2003/10/22 01:05:23	1.11
@@ -22,6 +22,8 @@
 #ifndef UTIL_H__
 #define UTIL_H__
 
+#include <openssl/rsa.h>
+
 #include "gettext.h"
 
 #include "slog.h"
@@ -52,6 +54,8 @@
  */
 #define ABSOLUTE_PATH(c) ((c)[0] == '/')
 
+/*****************************************************************************/
+
 typedef u8 mac[6];
 
 extern void id2mac (unsigned int id, void *m);
@@ -117,5 +121,27 @@
 u8 *base64_encode (const u8 *data, unsigned int len);
 #endif
 
+/*****************************************************************************/
+
+typedef u8 rsaclear[RSA_KEYLEN - RSA_OVERHEAD]; // challenge data;
+typedef u8 rsacrypt[RSA_KEYLEN]; // encrypted challenge
+
+static inline void
+rsa_encrypt (RSA *key, const rsaclear &chg, rsacrypt &encr)
+{
+  if (RSA_public_encrypt (sizeof chg,
+                          (unsigned char *)&chg, (unsigned char *)&encr,
+                          key, RSA_PKCS1_OAEP_PADDING) < 0)
+    fatal ("RSA_public_encrypt error");
+}
+
+static inline bool
+rsa_decrypt (RSA *key, const rsacrypt &encr, rsaclear &chg)
+{
+  return RSA_private_decrypt (sizeof encr,
+                              (unsigned char *)&encr, (unsigned char *)&chg,
+                              key, RSA_PKCS1_OAEP_PADDING) > 0;
+}
+
 #endif