#ifndef _CRYPTO_XTS_H
#define _CRYPTO_XTS_H

#include <crypto/b128ops.h>
#include <crypto/internal/skcipher.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;
}

static inline int xts_verify_key(struct crypto_skcipher *tfm,
				 const u8 *key, unsigned int keylen)
{
	/*
	 * key consists of keys of equal size concatenated, therefore
	 * the length must be even.
	 */
	if (keylen % 2) {
		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
		return -EINVAL;
	}

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

	return 0;
}

#endif  /* _CRYPTO_XTS_H */
f='/cgit.cgi/linux/net-next.git/tree/tools/perf/pmu-events?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/pmu-events?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/pmu-events?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/tools/perf/pmu-events'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='f35581d64e55fc65753a62957b3b98127d560d07'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/tools?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/log/tools/perf?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07'>perf</a>/<a href='/cgit.cgi/linux/net-next.git/log/tools/perf/pmu-events?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07'>pmu-events</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/tools/perf/pmu-events?h=nds-private-remove&amp;id=f35581d64e55fc65753a62957b3b98127d560d07&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>