des.h

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#include "netif/ppp/ppp_opts.h"
#if LWIP_INCLUDED_POLARSSL_DES

#ifndef LWIP_INCLUDED_POLARSSL_DES_H
#define LWIP_INCLUDED_POLARSSL_DES_H

#define DES_ENCRYPT     1
#define DES_DECRYPT     0

typedef struct
{
    int mode;                   
    unsigned long sk[32];       
}
des_context;

#ifdef __cplusplus
extern "C" {
#endif

void des_setkey_enc( des_context *ctx, unsigned char key[8] );

void des_setkey_dec( des_context *ctx, unsigned char key[8] );

void des_crypt_ecb( des_context *ctx,
                    const unsigned char input[8],
                    unsigned char output[8] );

#ifdef __cplusplus
}
#endif

#endif /* LWIP_INCLUDED_POLARSSL_DES_H */

#endif /* LWIP_INCLUDED_POLARSSL_DES */