Release 4.12 include/crypto/xts.h
#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 {
le128 *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 | 85 | 100.00% | 1 | 100.00% |
| Total | 85 | 100.00% | 1 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 89 | 100.00% | 1 | 100.00% |
| Total | 89 | 100.00% | 1 | 100.00% |
#endif /* _CRYPTO_XTS_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jussi Kivilinna | 116 | 39.06% | 1 | 25.00% |
| Herbert Xu | 90 | 30.30% | 1 | 25.00% |
| Stephan Mueller | 90 | 30.30% | 1 | 25.00% |
| Ondrej Mosnáček | 1 | 0.34% | 1 | 25.00% |
| Total | 297 | 100.00% | 4 | 100.00% |
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