des.c File Reference

DES crypto protocol. More...

Go to the source code of this file.

Functions
void	pok_protocols_des_init ()
void	pok_protocols_des_marshall (void *uncrypted_data, pok_size_t uncrypted_size, void *crypted_data, size_t *crypted_size)
void	pok_protocols_des_unmarshall (void *crypted_data, pok_size_t crypted_size, void *uncrypted_data, size_t *uncrypted_size)

Variables
unsigned char	initVector [8] = POK_PROTOCOLS_DES_INIT
int	pok_protocols_des_is_init = 0

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Detailed Description

DES crypto protocol.

Author:

Julien Delange

Date:

2009 This file is a wrapper that interfaces with OpenSSL functions. It sets the crypto key, initialisation string and calls OpenSSL function to crypts data.

Definition in file des.c.

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Function Documentation

void pok_protocols_des_marshall	(	void *	uncrypted_data,
		pok_size_t	uncrypted_size,
		void *	crypted_data,
		size_t *	crypted_size
	)

Function that crypts data.

Definition at line 54 of file des.c.

{
   DES_cblock ivec;
   DES_key_schedule schedule;

   DES_set_key_checked (&cbc_key, &schedule);

   memcpy(ivec,initVector,sizeof(initVector));

   DES_ncbc_encrypt(uncrypted_data, crypted_data, uncrypted_size, &schedule, &ivec, DES_ENCRYPT);
   *crypted_size = 8;
}

void pok_protocols_des_unmarshall	(	void *	crypted_data,
		pok_size_t	crypted_size,
		void *	uncrypted_data,
		size_t *	uncrypted_size
	)

Function that uncrypts data.

Definition at line 68 of file des.c.

{
   DES_cblock ivec;
   DES_key_schedule schedule;

   DES_set_key_checked (&cbc_key, &schedule);

   memcpy(ivec,initVector,sizeof(initVector));
   DES_ncbc_encrypt(crypted_data, uncrypted_data, crypted_size, &schedule, &ivec, DES_DECRYPT);

   *uncrypted_size = 8;
}