Release 4.7 include/crypto/xts.h

#ifndef _CRYPTO_XTS_H

#define _CRYPTO_XTS_H

#include <crypto/b128ops.h>
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <linux/fips.h>

struct scatterlist;
struct blkcipher_desc;


#define XTS_BLOCK_SIZE 16


struct xts_crypt_req {
	
be128 *tbuf;
	
unsigned int tbuflen;

	
void *tweak_ctx;
	
void (*tweak_fn)(void *ctx, u8* dst, const u8* src);
	
void *crypt_ctx;
	
void (*crypt_fn)(void *ctx, u8 *blks, unsigned int nbytes);
};


#define XTS_TWEAK_CAST(x) ((void (*)(void *, u8*, const u8*))(x))

int xts_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
	      struct scatterlist *src, unsigned int nbytes,
	      struct xts_crypt_req *req);



static inline int xts_check_key(struct crypto_tfm *tfm,
				const u8 *key, unsigned int keylen)
{
	u32 *flags = &tfm->crt_flags;

	/*
         * key consists of keys of equal size concatenated, therefore
         * the length must be even.
         */
	if (keylen % 2) {
		*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
		return -EINVAL;
	}

	/* ensure that the AES and tweak key are not identical */
	if (fips_enabled &&
	    !crypto_memneq(key, key + (keylen / 2), keylen / 2)) {
		*flags |= CRYPTO_TFM_RES_WEAK_KEY;
		return -EINVAL;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
stephan mueller
stephan mueller
85
100.00%
1
100.00%
Total
85
100.00%
1
100.00%

#endif  /* _CRYPTO_XTS_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
jussi kivilinna
jussi kivilinna
117
55.45%
1
50.00%
stephan mueller
stephan mueller
94
44.55%
1
50.00%
Total
211
100.00%
2
100.00%
  
Directory: include/crypto

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.