Mercurial > dropbear
diff src/pk/packet_valid_header.c @ 191:1c15b283127b libtomcrypt-orig
Import of libtomcrypt 1.02 with manual path rename rearrangement etc
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 06 May 2005 13:23:02 +0000 |
parents | |
children | 39d5d58461d6 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/pk/packet_valid_header.c Fri May 06 13:23:02 2005 +0000 @@ -0,0 +1,37 @@ +/* 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, [email protected], 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 + +