diff options
| -rw-r--r-- | crypto/rng.c | 35 | ||||
| -rw-r--r-- | include/crypto/rng.h | 32 | ||||
| -rw-r--r-- | include/linux/crypto.h | 12 |
3 files changed, 33 insertions, 46 deletions
diff --git a/crypto/rng.c b/crypto/rng.c index e0a25c2..87fa2f4 100644 --- a/crypto/rng.c +++ b/crypto/rng.c @@ -24,11 +24,18 @@ #include <linux/cryptouser.h> #include <net/netlink.h> +#include "internal.h" + static DEFINE_MUTEX(crypto_default_rng_lock); struct crypto_rng *crypto_default_rng; EXPORT_SYMBOL_GPL(crypto_default_rng); static int crypto_default_rng_refcnt; +static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm) +{ + return container_of(tfm, struct crypto_rng, base); +} + static int rngapi_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen) { u8 *buf = NULL; @@ -49,13 +56,13 @@ static int rngapi_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen) return err; } -static int crypto_init_rng_ops(struct crypto_tfm *tfm, u32 type, u32 mask) +static int crypto_rng_init_tfm(struct crypto_tfm *tfm) { + struct crypto_rng *rng = __crypto_rng_cast(tfm); struct rng_alg *alg = &tfm->__crt_alg->cra_rng; - struct rng_tfm *ops = &tfm->crt_rng; - ops->rng_gen_random = alg->rng_make_random; - ops->rng_reset = rngapi_reset; + rng->generate = alg->rng_make_random; + rng->seed = rngapi_reset; return 0; } @@ -92,22 +99,26 @@ static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg) seq_printf(m, "seedsize : %u\n", alg->cra_rng.seedsize); } -static unsigned int crypto_rng_ctxsize(struct crypto_alg *alg, u32 type, - u32 mask) -{ - return alg->cra_ctxsize; -} - const struct crypto_type crypto_rng_type = { - .ctxsize = crypto_rng_ctxsize, - .init = crypto_init_rng_ops, + .extsize = crypto_alg_extsize, + .init_tfm = crypto_rng_init_tfm, #ifdef CONFIG_PROC_FS .show = crypto_rng_show, #endif .report = crypto_rng_report, + .maskclear = ~CRYPTO_ALG_TYPE_MASK, + .maskset = CRYPTO_ALG_TYPE_MASK, + .type = CRYPTO_ALG_TYPE_RNG, + .tfmsize = offsetof(struct crypto_rng, base), }; EXPORT_SYMBOL_GPL(crypto_rng_type); +struct crypto_rng *crypto_alloc_rng(const char *alg_name, u32 type, u32 mask) +{ + return crypto_alloc_tfm(alg_name, &crypto_rng_type, type, mask); +} +EXPORT_SYMBOL_GPL(crypto_alloc_rng); + int crypto_get_default_rng(void) { struct crypto_rng *rng; diff --git a/include/crypto/rng.h b/include/crypto/rng.h index 6e28ea5..f13f3fa 100644 --- a/include/crypto/rng.h +++ b/include/crypto/rng.h @@ -15,6 +15,12 @@ #include <linux/crypto.h> +struct crypto_rng { + int (*generate)(struct crypto_rng *tfm, u8 *rdata, unsigned int dlen); + int (*seed)(struct crypto_rng *tfm, u8 *seed, unsigned int slen); + struct crypto_tfm base; +}; + extern struct crypto_rng *crypto_default_rng; int crypto_get_default_rng(void); @@ -27,11 +33,6 @@ void crypto_put_default_rng(void); * CRYPTO_ALG_TYPE_RNG (listed as type "rng" in /proc/crypto) */ -static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm) -{ - return (struct crypto_rng *)tfm; -} - /** * crypto_alloc_rng() -- allocate RNG handle * @alg_name: is the cra_name / name or cra_driver_name / driver name of the @@ -52,15 +53,7 @@ static inline struct crypto_rng *__crypto_rng_cast(struct crypto_tfm *tfm) * Return: allocated cipher handle in case of success; IS_ERR() is true in case * of an error, PTR_ERR() returns the error code. */ -static inline struct crypto_rng *crypto_alloc_rng(const char *alg_name, - u32 type, u32 mask) -{ - type &= ~CRYPTO_ALG_TYPE_MASK; - type |= CRYPTO_ALG_TYPE_RNG; - mask |= CRYPTO_ALG_TYPE_MASK; - - return __crypto_rng_cast(crypto_alloc_base(alg_name, type, mask)); -} +struct crypto_rng *crypto_alloc_rng(const char *alg_name, u32 type, u32 mask); static inline struct crypto_tfm *crypto_rng_tfm(struct crypto_rng *tfm) { @@ -80,18 +73,13 @@ static inline struct rng_alg *crypto_rng_alg(struct crypto_rng *tfm) return &crypto_rng_tfm(tfm)->__crt_alg->cra_rng; } -static inline struct rng_tfm *crypto_rng_crt(struct crypto_rng *tfm) -{ - return &crypto_rng_tfm(tfm)->crt_rng; -} - /** * crypto_free_rng() - zeroize and free RNG handle * @tfm: cipher handle to be freed */ static inline void crypto_free_rng(struct crypto_rng *tfm) { - crypto_free_tfm(crypto_rng_tfm(tfm)); + crypto_destroy_tfm(tfm, crypto_rng_tfm(tfm)); } /** @@ -108,7 +96,7 @@ static inline void crypto_free_rng(struct crypto_rng *tfm) static inline int crypto_rng_get_bytes(struct crypto_rng *tfm, u8 *rdata, unsigned int dlen) { - return crypto_rng_crt(tfm)->rng_gen_random(tfm, rdata, dlen); + return tfm->generate(tfm, rdata, dlen); } /** @@ -131,7 +119,7 @@ static inline int crypto_rng_get_bytes(struct crypto_rng *tfm, static inline int crypto_rng_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen) { - return crypto_rng_crt(tfm)->rng_reset(tfm, seed, slen); + return tfm->seed(tfm, seed, slen); } /** diff --git a/include/linux/crypto.h b/include/linux/crypto.h index 10df5d2..781f7d5 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -655,19 +655,12 @@ struct compress_tfm { u8 *dst, unsigned int *dlen); }; -struct rng_tfm { - int (*rng_gen_random)(struct crypto_rng *tfm, u8 *rdata, - unsigned int dlen); - int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen); -}; - #define crt_ablkcipher crt_u.ablkcipher #define crt_aead crt_u.aead #define crt_blkcipher crt_u.blkcipher #define crt_cipher crt_u.cipher #define crt_hash crt_u.hash #define crt_compress crt_u.compress -#define crt_rng crt_u.rng struct crypto_tfm { @@ -680,7 +673,6 @@ struct crypto_tfm { struct cipher_tfm cipher; struct hash_tfm hash; struct compress_tfm compress; - struct rng_tfm rng; } crt_u; void (*exit)(struct crypto_tfm *tfm); @@ -714,10 +706,6 @@ struct crypto_hash { struct crypto_tfm base; }; -struct crypto_rng { - struct crypto_tfm base; -}; - enum { CRYPTOA_UNSPEC, CRYPTOA_ALG, |
