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libtomcrypt/src/pk/packet_valid_header.c

 

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/* LibTomCrypt, modular cryptographic library -- Tom St Denis

 

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 *

 

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 * LibTomCrypt is a library that provides various cryptographic

 

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 * algorithms in a highly modular and flexible manner.

 

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 *

 

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 * The library is free for all purposes without any express

 

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 * guarantee it works.

 

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 *

 

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 * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org

 

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 */

 

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#include "tomcrypt.h"

 

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#ifdef PACKET

 

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int packet_valid_header(unsigned char *src, int section, int subsection)

 

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{

 

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   unsigned long ver;

 

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   LTC_ARGCHK(src != NULL);

 

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   /* check version */

 

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   ver = ((unsigned long)src[0]) | ((unsigned long)src[1] << 8U);

 

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   if (CRYPT < ver) {

 

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      return CRYPT_INVALID_PACKET;

 

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   }

 

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   /* check section and subsection */

 

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   if (section != (int)src[2] || subsection != (int)src[3]) {

 

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      return CRYPT_INVALID_PACKET;

 

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   }

 

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   return CRYPT_OK;

 

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}

 

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#endif

 

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/* $Source: /cvs/libtom/libtomcrypt/src/pk/packet_valid_header.c,v $ */

 

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/* $Revision: 1.3 $ */

 

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/* $Date: 2005/05/05 14:35:59 $ */

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