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comparison packet_valid_header.c @ 0:d7da3b1e1540 libtomcrypt

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put back the 0.95 makefile which was inadvertently merged over
author Matt Johnston <matt@ucc.asn.au>
date Mon, 31 May 2004 18:21:40 +0000
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-1:000000000000 0:d7da3b1e1540
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.org
10 */
11 #include "mycrypt.h"
12
13 #ifdef PACKET
14
15 int packet_valid_header(unsigned char *src, int section, int subsection)
16 {
17 unsigned long ver;
18
19 _ARGCHK(src != NULL);
20
21 /* check version */
22 ver = ((unsigned long)src[0]) | ((unsigned long)src[1] << 8U);
23 if (CRYPT < ver) {
24 return CRYPT_INVALID_PACKET;
25 }
26
27 /* check section and subsection */
28 if (section != (int)src[2] || subsection != (int)src[3]) {
29 return CRYPT_INVALID_PACKET;
30 }
31
32 return CRYPT_OK;
33 }
34
35 #endif
36
37