| /* 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@iahu.ca, http://libtomcrypt.org |
| */ |
| #include "mycrypt.h" |
| |
| #ifdef PACKET |
| |
| int packet_valid_header(unsigned char *src, int section, int subsection) |
| { |
| unsigned long ver; |
| |
| _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 |
| |
| |
