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Viewing changes to libtomcrypt/packet_valid_header.c

  • Committer: Bazaar Package Importer
  • Author(s): Matt Johnston
  • Date: 2005-12-08 19:20:21 UTC
  • mfrom: (1.2.2 upstream)
  • Revision ID: james.westby@ubuntu.com-20051208192021-nyp9rwnt77nsg6ty
Tags: 0.47-1
* New upstream release.
* SECURITY: Fix incorrect buffer sizing.

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libtomcrypt/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@iahu.ca, http://libtomcrypt.org
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 */
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#include "mycrypt.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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   _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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