diff options
Diffstat (limited to 'include/linux/crypto.h')
| -rw-r--r-- | include/linux/crypto.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/include/linux/crypto.h b/include/linux/crypto.h index fdecee83878..5a5466d518e 100644 --- a/include/linux/crypto.h +++ b/include/linux/crypto.h @@ -32,6 +32,7 @@ #define CRYPTO_ALG_TYPE_MASK 0x0000000f #define CRYPTO_ALG_TYPE_CIPHER 0x00000001 #define CRYPTO_ALG_TYPE_DIGEST 0x00000002 +#define CRYPTO_ALG_TYPE_BLKCIPHER 0x00000003 #define CRYPTO_ALG_TYPE_COMPRESS 0x00000004 #define CRYPTO_ALG_LARVAL 0x00000010 @@ -89,9 +90,16 @@ #endif struct scatterlist; +struct crypto_blkcipher; struct crypto_tfm; struct crypto_type; +struct blkcipher_desc { + struct crypto_blkcipher *tfm; + void *info; + u32 flags; +}; + struct cipher_desc { struct crypto_tfm *tfm; void (*crfn)(struct crypto_tfm *tfm, u8 *dst, const u8 *src); @@ -104,6 +112,21 @@ struct cipher_desc { * Algorithms: modular crypto algorithm implementations, managed * via crypto_register_alg() and crypto_unregister_alg(). */ +struct blkcipher_alg { + int (*setkey)(struct crypto_tfm *tfm, const u8 *key, + unsigned int keylen); + int (*encrypt)(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes); + int (*decrypt)(struct blkcipher_desc *desc, + struct scatterlist *dst, struct scatterlist *src, + unsigned int nbytes); + + unsigned int min_keysize; + unsigned int max_keysize; + unsigned int ivsize; +}; + struct cipher_alg { unsigned int cia_min_keysize; unsigned int cia_max_keysize; @@ -143,6 +166,7 @@ struct compress_alg { unsigned int slen, u8 *dst, unsigned int *dlen); }; +#define cra_blkcipher cra_u.blkcipher #define cra_cipher cra_u.cipher #define cra_digest cra_u.digest #define cra_compress cra_u.compress @@ -165,6 +189,7 @@ struct crypto_alg { const struct crypto_type *cra_type; union { + struct blkcipher_alg blkcipher; struct cipher_alg cipher; struct digest_alg digest; struct compress_alg compress; @@ -201,6 +226,16 @@ static inline int crypto_alg_available(const char *name, u32 flags) * crypto_free_*(), as well as the various helpers below. */ +struct blkcipher_tfm { + void *iv; + int (*setkey)(struct crypto_tfm *tfm, const u8 *key, + unsigned int keylen); + int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes); + int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes); +}; + struct cipher_tfm { void *cit_iv; unsigned int cit_ivsize; @@ -251,6 +286,7 @@ struct compress_tfm { u8 *dst, unsigned int *dlen); }; +#define crt_blkcipher crt_u.blkcipher #define crt_cipher crt_u.cipher #define crt_digest crt_u.digest #define crt_compress crt_u.compress @@ -260,6 +296,7 @@ struct crypto_tfm { u32 crt_flags; union { + struct blkcipher_tfm blkcipher; struct cipher_tfm cipher; struct digest_tfm digest; struct compress_tfm compress; @@ -272,6 +309,10 @@ struct crypto_tfm { #define crypto_cipher crypto_tfm +struct crypto_blkcipher { + struct crypto_tfm base; +}; + enum { CRYPTOA_UNSPEC, CRYPTOA_ALG, @@ -380,6 +421,144 @@ static inline unsigned int crypto_tfm_ctx_alignment(void) /* * API wrappers. */ +static inline struct crypto_blkcipher *__crypto_blkcipher_cast( + struct crypto_tfm *tfm) +{ + return (struct crypto_blkcipher *)tfm; +} + +static inline struct crypto_blkcipher *crypto_blkcipher_cast( + struct crypto_tfm *tfm) +{ + BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER); + return __crypto_blkcipher_cast(tfm); +} + +static inline struct crypto_blkcipher *crypto_alloc_blkcipher( + const char *alg_name, u32 type, u32 mask) +{ + type &= ~CRYPTO_ALG_TYPE_MASK; + type |= CRYPTO_ALG_TYPE_BLKCIPHER; + mask |= CRYPTO_ALG_TYPE_MASK; + + return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask)); +} + +static inline struct crypto_tfm *crypto_blkcipher_tfm( + struct crypto_blkcipher *tfm) +{ + return &tfm->base; +} + +static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm) +{ + crypto_free_tfm(crypto_blkcipher_tfm(tfm)); +} + +static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm) +{ + return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm)); +} + +static inline struct blkcipher_tfm *crypto_blkcipher_crt( + struct crypto_blkcipher *tfm) +{ + return &crypto_blkcipher_tfm(tfm)->crt_blkcipher; +} + +static inline struct blkcipher_alg *crypto_blkcipher_alg( + struct crypto_blkcipher *tfm) +{ + return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher; +} + +static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm) +{ + return crypto_blkcipher_alg(tfm)->ivsize; +} + +static inline unsigned int crypto_blkcipher_blocksize( + struct crypto_blkcipher *tfm) +{ + return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm)); +} + +static inline unsigned int crypto_blkcipher_alignmask( + struct crypto_blkcipher *tfm) +{ + return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm)); +} + +static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm) +{ + return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm)); +} + +static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm, + u32 flags) +{ + crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags); +} + +static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm, + u32 flags) +{ + crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags); +} + +static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm, + const u8 *key, unsigned int keylen) +{ + return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm), + key, keylen); +} + +static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, + struct scatterlist *src, + unsigned int nbytes) +{ + desc->info = crypto_blkcipher_crt(desc->tfm)->iv; + return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); +} + +static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc, + struct scatterlist *dst, + struct scatterlist *src, + unsigned int nbytes) +{ + return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes); +} + +static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc, + struct scatterlist *dst, + struct scatterlist *src, + unsigned int nbytes) +{ + desc->info = crypto_blkcipher_crt(desc->tfm)->iv; + return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); +} + +static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc, + struct scatterlist *dst, + struct scatterlist *src, + unsigned int nbytes) +{ + return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes); +} + +static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm, + const u8 *src, unsigned int len) +{ + memcpy(crypto_blkcipher_crt(tfm)->iv, src, len); +} + +static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm, + u8 *dst, unsigned int len) +{ + memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len); +} + static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm) { return (struct crypto_cipher *)tfm; |