cregit-Linux how code gets into the kernel

Release 4.12 include/crypto/xts.h

Directory: include/crypto
#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

PersonTokensPropCommitsCommitProp
Stephan Mueller85100.00%1100.00%
Total85100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Herbert Xu89100.00%1100.00%
Total89100.00%1100.00%

#endif /* _CRYPTO_XTS_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Jussi Kivilinna11639.06%125.00%
Herbert Xu9030.30%125.00%
Stephan Mueller9030.30%125.00%
Ondrej Mosnáček10.34%125.00%
Total297100.00%4100.00%
Directory: include/crypto
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