#ifndef _LINUX_CRYPTO_H
#define _LINUX_CRYPTO_H
+#include <asm/atomic.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/list.h>
+#include <linux/slab.h>
#include <linux/string.h>
-#include <asm/page.h>
+#include <linux/uaccess.h>
/*
* Algorithm masks and types.
*/
-#define CRYPTO_ALG_TYPE_MASK 0x000000ff
+#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
+#define CRYPTO_ALG_DEAD 0x00000020
+#define CRYPTO_ALG_DYING 0x00000040
+#define CRYPTO_ALG_ASYNC 0x00000080
+
/*
* Transform masks and values (for crt_flags).
*/
#define CRYPTO_DIR_ENCRYPT 1
#define CRYPTO_DIR_DECRYPT 0
+/*
+ * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
+ * declaration) is used to ensure that the crypto_tfm context structure is
+ * aligned correctly for the given architecture so that there are no alignment
+ * faults for C data types. In particular, this is required on platforms such
+ * as arm where pointers are 32-bit aligned but there are data types such as
+ * u64 which require 64-bit alignment.
+ */
+#if defined(ARCH_KMALLOC_MINALIGN)
+#define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN
+#elif defined(ARCH_SLAB_MINALIGN)
+#define CRYPTO_MINALIGN ARCH_SLAB_MINALIGN
+#endif
+
+#ifdef CRYPTO_MINALIGN
+#define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))
+#else
+#define CRYPTO_MINALIGN_ATTR
+#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;
* 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;
int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen, u32 *flags);
+ unsigned int keylen);
void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
unsigned int len);
void (*dia_final)(struct crypto_tfm *tfm, u8 *out);
int (*dia_setkey)(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen, u32 *flags);
+ unsigned int keylen);
};
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
struct crypto_alg {
struct list_head cra_list;
+ struct list_head cra_users;
+
u32 cra_flags;
unsigned int cra_blocksize;
unsigned int cra_ctxsize;
unsigned int cra_alignmask;
int cra_priority;
+ atomic_t cra_refcnt;
char cra_name[CRYPTO_MAX_ALG_NAME];
char cra_driver_name[CRYPTO_MAX_ALG_NAME];
+ const struct crypto_type *cra_type;
+
union {
+ struct blkcipher_alg blkcipher;
struct cipher_alg cipher;
struct digest_alg digest;
struct compress_alg compress;
int (*cra_init)(struct crypto_tfm *tfm);
void (*cra_exit)(struct crypto_tfm *tfm);
+ void (*cra_destroy)(struct crypto_alg *alg);
struct module *cra_module;
};
/*
* Transforms: user-instantiated objects which encapsulate algorithms
- * and core processing logic. Managed via crypto_alloc_tfm() and
- * crypto_free_tfm(), as well as the various helpers below.
+ * and core processing logic. Managed via crypto_alloc_*() and
+ * 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;
struct scatterlist *src,
unsigned int nbytes, u8 *iv);
void (*cit_xor_block)(u8 *dst, const u8 *src);
+ void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
+ void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
};
struct digest_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
u32 crt_flags;
union {
+ struct blkcipher_tfm blkcipher;
struct cipher_tfm cipher;
struct digest_tfm digest;
struct compress_tfm compress;
struct crypto_alg *__crt_alg;
- char __crt_ctx[] __attribute__ ((__aligned__));
+ void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
+};
+
+#define crypto_cipher crypto_tfm
+
+struct crypto_blkcipher {
+ struct crypto_tfm base;
+};
+
+enum {
+ CRYPTOA_UNSPEC,
+ CRYPTOA_ALG,
+};
+
+struct crypto_attr_alg {
+ char name[CRYPTO_MAX_ALG_NAME];
};
/*
* Transform user interface.
*/
-/*
- * crypto_alloc_tfm() will first attempt to locate an already loaded algorithm.
- * If that fails and the kernel supports dynamically loadable modules, it
- * will then attempt to load a module of the same name or alias. A refcount
- * is grabbed on the algorithm which is then associated with the new transform.
- *
- * crypto_free_tfm() frees up the transform and any associated resources,
- * then drops the refcount on the associated algorithm.
- */
struct crypto_tfm *crypto_alloc_tfm(const char *alg_name, u32 tfm_flags);
+struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);
void crypto_free_tfm(struct crypto_tfm *tfm);
/*
return tfm->__crt_alg->cra_name;
}
+static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
+{
+ return tfm->__crt_alg->cra_driver_name;
+}
+
+static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
+{
+ return tfm->__crt_alg->cra_priority;
+}
+
static inline const char *crypto_tfm_alg_modname(struct crypto_tfm *tfm)
{
return module_name(tfm->__crt_alg->cra_module);
return tfm->__crt_alg->cra_alignmask;
}
+static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
+{
+ return tfm->crt_flags;
+}
+
+static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
+{
+ tfm->crt_flags |= flags;
+}
+
+static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
+{
+ tfm->crt_flags &= ~flags;
+}
+
static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
{
return tfm->__crt_ctx;
/*
* 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;
+}
+
+static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm)
+{
+ BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
+ return __crypto_cipher_cast(tfm);
+}
+
+static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
+ u32 type, u32 mask)
+{
+ type &= ~CRYPTO_ALG_TYPE_MASK;
+ type |= CRYPTO_ALG_TYPE_CIPHER;
+ mask |= CRYPTO_ALG_TYPE_MASK;
+
+ return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
+}
+
+static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
+{
+ return tfm;
+}
+
+static inline void crypto_free_cipher(struct crypto_cipher *tfm)
+{
+ crypto_free_tfm(crypto_cipher_tfm(tfm));
+}
+
+static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm)
+{
+ return &crypto_cipher_tfm(tfm)->crt_cipher;
+}
+
+static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
+{
+ return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
+}
+
+static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
+{
+ return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
+}
+
+static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
+{
+ return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
+}
+
+static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
+ u32 flags)
+{
+ crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
+}
+
+static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
+ u32 flags)
+{
+ crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
+}
+
+static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
+ u8 *dst, const u8 *src)
+{
+ crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm),
+ dst, src);
+}
+
+static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
+ u8 *dst, const u8 *src)
+{
+ crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm),
+ dst, src);
+}
+
static inline void crypto_digest_init(struct crypto_tfm *tfm)
{
BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
const u8 *key, unsigned int keylen)
{
BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
- if (tfm->crt_digest.dit_setkey == NULL)
- return -ENOSYS;
return tfm->crt_digest.dit_setkey(tfm, key, keylen);
}
unsigned int nbytes, u8 *iv)
{
BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- BUG_ON(tfm->crt_cipher.cit_mode == CRYPTO_TFM_MODE_ECB);
return tfm->crt_cipher.cit_encrypt_iv(tfm, dst, src, nbytes, iv);
}
unsigned int nbytes, u8 *iv)
{
BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- BUG_ON(tfm->crt_cipher.cit_mode == CRYPTO_TFM_MODE_ECB);
return tfm->crt_cipher.cit_decrypt_iv(tfm, dst, src, nbytes, iv);
}
Code Review / linux-3.10.git / blobdiff