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#ifndef _GPXE_CBC_H
#define _GPXE_CBC_H
/** @file
*
* Cipher-block chaining
*
*/
#include <gpxe/crypto.h>
/**
* Set key
*
* @v ctx Context
* @v key Key
* @v keylen Key length
* @v cipher Underlying cipher algorithm
* @v cbc_ctx CBC context
* @ret rc Return status code
*/
static inline int cbc_setkey ( void *ctx, const void *key, size_t keylen,
struct cipher_algorithm *cipher,
void *cbc_ctx __unused ) {
return cipher_setkey ( cipher, ctx, key, keylen );
}
/**
* Set initialisation vector
*
* @v ctx Context
* @v iv Initialisation vector
* @v cipher Underlying cipher algorithm
* @v cbc_ctx CBC context
*/
static inline void cbc_setiv ( void *ctx __unused, const void *iv,
struct cipher_algorithm *cipher,
void *cbc_ctx ) {
memcpy ( cbc_ctx, iv, cipher->blocksize );
}
extern void cbc_encrypt ( void *ctx, const void *src, void *dst,
size_t len, struct cipher_algorithm *cipher,
void *cbc_ctx );
extern void cbc_decrypt ( void *ctx, const void *src, void *dst,
size_t len, struct cipher_algorithm *cipher,
void *cbc_ctx );
#endif /* _GPXE_CBC_H */
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