+++ /dev/null
-/*
- * Scatterlist Cryptographic API.
- *
- * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
- * Copyright (c) 2002 David S. Miller (davem@redhat.com)
- *
- * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>
- * and Nettle, by Niels Mé°ˆler.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- */
-#ifndef _LINUX_CRYPTO_H
-#define _LINUX_CRYPTO_H
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/list.h>
-#include <linux/string.h>
-#include <asm/page.h>
-#include <linux/errno.h>
-
-#define crypto_register_alg crypto_register_alg_rsl
-#define crypto_unregister_alg crypto_unregister_alg_rsl
-#define crypto_alloc_tfm crypto_alloc_tfm_rsl
-#define crypto_free_tfm crypto_free_tfm_rsl
-#define crypto_alg_available crypto_alg_available_rsl
-
-/*
- * Algorithm masks and types.
- */
-#define CRYPTO_ALG_TYPE_MASK 0x000000ff
-#define CRYPTO_ALG_TYPE_CIPHER 0x00000001
-#define CRYPTO_ALG_TYPE_DIGEST 0x00000002
-#define CRYPTO_ALG_TYPE_COMPRESS 0x00000004
-
-/*
- * Transform masks and values (for crt_flags).
- */
-#define CRYPTO_TFM_MODE_MASK 0x000000ff
-#define CRYPTO_TFM_REQ_MASK 0x000fff00
-#define CRYPTO_TFM_RES_MASK 0xfff00000
-
-#define CRYPTO_TFM_MODE_ECB 0x00000001
-#define CRYPTO_TFM_MODE_CBC 0x00000002
-#define CRYPTO_TFM_MODE_CFB 0x00000004
-#define CRYPTO_TFM_MODE_CTR 0x00000008
-
-#define CRYPTO_TFM_REQ_WEAK_KEY 0x00000100
-#define CRYPTO_TFM_RES_WEAK_KEY 0x00100000
-#define CRYPTO_TFM_RES_BAD_KEY_LEN 0x00200000
-#define CRYPTO_TFM_RES_BAD_KEY_SCHED 0x00400000
-#define CRYPTO_TFM_RES_BAD_BLOCK_LEN 0x00800000
-#define CRYPTO_TFM_RES_BAD_FLAGS 0x01000000
-
-/*
- * Miscellaneous stuff.
- */
-#define CRYPTO_UNSPEC 0
-#define CRYPTO_MAX_ALG_NAME 64
-
-struct scatterlist;
-
-/*
- * Algorithms: modular crypto algorithm implementations, managed
- * via crypto_register_alg() and crypto_unregister_alg().
- */
-struct cipher_alg {
- unsigned int cia_min_keysize;
- unsigned int cia_max_keysize;
- int (*cia_setkey)(void *ctx, const u8 *key,
- unsigned int keylen, u32 *flags);
- void (*cia_encrypt)(void *ctx, u8 *dst, const u8 *src);
- void (*cia_decrypt)(void *ctx, u8 *dst, const u8 *src);
-};
-
-struct digest_alg {
- unsigned int dia_digestsize;
- void (*dia_init)(void *ctx);
- void (*dia_update)(void *ctx, const u8 *data, unsigned int len);
- void (*dia_final)(void *ctx, u8 *out);
- int (*dia_setkey)(void *ctx, const u8 *key,
- unsigned int keylen, u32 *flags);
-};
-
-struct compress_alg {
- int (*coa_init)(void *ctx);
- void (*coa_exit)(void *ctx);
- int (*coa_compress)(void *ctx, const u8 *src, unsigned int slen,
- u8 *dst, unsigned int *dlen);
- int (*coa_decompress)(void *ctx, const u8 *src, unsigned int slen,
- u8 *dst, unsigned int *dlen);
-};
-
-#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;
- u32 cra_flags;
- unsigned int cra_blocksize;
- unsigned int cra_ctxsize;
- const char cra_name[CRYPTO_MAX_ALG_NAME];
-
- union {
- struct cipher_alg cipher;
- struct digest_alg digest;
- struct compress_alg compress;
- } cra_u;
-
- struct module *cra_module;
-};
-
-/*
- * Algorithm registration interface.
- */
-int crypto_register_alg(struct crypto_alg *alg);
-int crypto_unregister_alg(struct crypto_alg *alg);
-
-/*
- * Algorithm query interface.
- */
-int crypto_alg_available(const char *name, u32 flags);
-
-/*
- * 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.
- */
-struct crypto_tfm;
-
-struct cipher_tfm {
- void *cit_iv;
- unsigned int cit_ivsize;
- u32 cit_mode;
- int (*cit_setkey)(struct crypto_tfm *tfm,
- const u8 *key, unsigned int keylen);
- int (*cit_encrypt)(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes);
- int (*cit_encrypt_iv)(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes, u8 *iv);
- int (*cit_decrypt)(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes);
- int (*cit_decrypt_iv)(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes, u8 *iv);
- void (*cit_xor_block)(u8 *dst, const u8 *src);
-};
-
-struct digest_tfm {
- void (*dit_init)(struct crypto_tfm *tfm);
- void (*dit_update)(struct crypto_tfm *tfm,
- struct scatterlist *sg, unsigned int nsg);
- void (*dit_final)(struct crypto_tfm *tfm, u8 *out);
- void (*dit_digest)(struct crypto_tfm *tfm, struct scatterlist *sg,
- unsigned int nsg, u8 *out);
- int (*dit_setkey)(struct crypto_tfm *tfm,
- const u8 *key, unsigned int keylen);
-};
-
-struct compress_tfm {
- int (*cot_compress)(struct crypto_tfm *tfm,
- const u8 *src, unsigned int slen,
- u8 *dst, unsigned int *dlen);
- int (*cot_decompress)(struct crypto_tfm *tfm,
- const u8 *src, unsigned int slen,
- u8 *dst, unsigned int *dlen);
-};
-
-#define crt_cipher crt_u.cipher
-#define crt_digest crt_u.digest
-#define crt_compress crt_u.compress
-
-struct crypto_tfm {
-
- u32 crt_flags;
-
- union {
- struct cipher_tfm cipher;
- struct digest_tfm digest;
- struct compress_tfm compress;
- } crt_u;
-
- struct crypto_alg *__crt_alg;
-};
-
-/*
- * 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);
-void crypto_free_tfm(struct crypto_tfm *tfm);
-
-/*
- * Transform helpers which query the underlying algorithm.
- */
-static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
-{
- return tfm->__crt_alg->cra_name;
-}
-
-static inline const char *crypto_tfm_alg_modname(struct crypto_tfm *tfm)
-{
- struct crypto_alg *alg = tfm->__crt_alg;
-
- if (alg->cra_module)
- return alg->cra_module->name;
- else
- return NULL;
-}
-
-static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
-{
- return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
-}
-
-static inline unsigned int crypto_tfm_alg_min_keysize(struct crypto_tfm *tfm)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- return tfm->__crt_alg->cra_cipher.cia_min_keysize;
-}
-
-static inline unsigned int crypto_tfm_alg_max_keysize(struct crypto_tfm *tfm)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- return tfm->__crt_alg->cra_cipher.cia_max_keysize;
-}
-
-static inline unsigned int crypto_tfm_alg_ivsize(struct crypto_tfm *tfm)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- return tfm->crt_cipher.cit_ivsize;
-}
-
-static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
-{
- return tfm->__crt_alg->cra_blocksize;
-}
-
-static inline unsigned int crypto_tfm_alg_digestsize(struct crypto_tfm *tfm)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
- return tfm->__crt_alg->cra_digest.dia_digestsize;
-}
-
-/*
- * API wrappers.
- */
-static inline void crypto_digest_init(struct crypto_tfm *tfm)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
- tfm->crt_digest.dit_init(tfm);
-}
-
-static inline void crypto_digest_update(struct crypto_tfm *tfm,
- struct scatterlist *sg,
- unsigned int nsg)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
- tfm->crt_digest.dit_update(tfm, sg, nsg);
-}
-
-static inline void crypto_digest_final(struct crypto_tfm *tfm, u8 *out)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
- tfm->crt_digest.dit_final(tfm, out);
-}
-
-static inline void crypto_digest_digest(struct crypto_tfm *tfm,
- struct scatterlist *sg,
- unsigned int nsg, u8 *out)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_DIGEST);
- tfm->crt_digest.dit_digest(tfm, sg, nsg, out);
-}
-
-static inline int crypto_digest_setkey(struct crypto_tfm *tfm,
- 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);
-}
-
-static inline int crypto_cipher_setkey(struct crypto_tfm *tfm,
- const u8 *key, unsigned int keylen)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- return tfm->crt_cipher.cit_setkey(tfm, key, keylen);
-}
-
-static inline int crypto_cipher_encrypt(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- return tfm->crt_cipher.cit_encrypt(tfm, dst, src, nbytes);
-}
-
-static inline int crypto_cipher_encrypt_iv(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- 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);
-}
-
-static inline int crypto_cipher_decrypt(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- unsigned int nbytes)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- return tfm->crt_cipher.cit_decrypt(tfm, dst, src, nbytes);
-}
-
-static inline int crypto_cipher_decrypt_iv(struct crypto_tfm *tfm,
- struct scatterlist *dst,
- struct scatterlist *src,
- 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);
-}
-
-static inline void crypto_cipher_set_iv(struct crypto_tfm *tfm,
- const u8 *src, unsigned int len)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- memcpy(tfm->crt_cipher.cit_iv, src, len);
-}
-
-static inline void crypto_cipher_get_iv(struct crypto_tfm *tfm,
- u8 *dst, unsigned int len)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
- memcpy(dst, tfm->crt_cipher.cit_iv, len);
-}
-
-static inline int crypto_comp_compress(struct crypto_tfm *tfm,
- const u8 *src, unsigned int slen,
- u8 *dst, unsigned int *dlen)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_COMPRESS);
- return tfm->crt_compress.cot_compress(tfm, src, slen, dst, dlen);
-}
-
-static inline int crypto_comp_decompress(struct crypto_tfm *tfm,
- const u8 *src, unsigned int slen,
- u8 *dst, unsigned int *dlen)
-{
- BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_COMPRESS);
- return tfm->crt_compress.cot_decompress(tfm, src, slen, dst, dlen);
-}
-
-#endif /* _LINUX_CRYPTO_H */
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