roboot/boot/xtea.h

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#ifndef XTEA_H_
#define XTEA_H_
/* ================================================================================ *//* ================================================================================= */

#include <stdint.h>

#define XTEA_KEYLEN     16
#define XTEA_BLOCKLEN   8

/* structure used internally by the XTEA algorithm implementation to keep actual state of encryption */
typedef struct {
    uint32_t A[32];
    uint32_t B[32];
    uint8_t IV[XTEA_BLOCKLEN];
    uint8_t pad[XTEA_BLOCKLEN];
    uint32_t padlen;
} XteaStateKey_T;

void XteaSetup(const uint8_t *key, const uint8_t *iv, XteaStateKey_T *skey);

void XteaRestart(XteaStateKey_T *skey);

void XteaEncrypt(const uint8_t *pt, uint8_t *ct, uint32_t len, XteaStateKey_T *skey);

void XteaDecrypt(const uint8_t *ct, uint8_t *pt, uint32_t len, XteaStateKey_T *skey);

#endif /*XTEA_H_*/

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