1 files changed, 41 insertions, 0 deletions
diff --git a/libtomcrypt/src/pk/packet_valid_header.c b/libtomcrypt/src/pk/packet_valid_header.c
new file mode 100644
index 0000000..59db0f7
--- /dev/null
+++ b/libtomcrypt/src/pk/packet_valid_header.c
@@ -0,0 +1,41 @@
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org
+ */
+#include "tomcrypt.h"
+
+#ifdef PACKET
+
+int packet_valid_header(unsigned char *src, int section, int subsection)
+{
+   unsigned long ver;
+
+   LTC_ARGCHK(src != NULL);
+
+   /* check version */
+   ver = ((unsigned long)src[0]) | ((unsigned long)src[1] << 8U);
+   if (CRYPT < ver) {
+      return CRYPT_INVALID_PACKET;
+   }
+
+   /* check section and subsection */
+   if (section != (int)src[2] || subsection != (int)src[3]) {
+      return CRYPT_INVALID_PACKET;
+   }
+
+   return CRYPT_OK;
+}
+
+#endif
+
+ 
+
+/* $Source: /cvs/libtom/libtomcrypt/src/pk/packet_valid_header.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */