http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/crypto.h

/* * Scatterlist Cryptographic API. * * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> * Copyright (c) 2002 David S. Miller (davem@redhat.com) * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> * * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no> * and Nettle, by Niels Möller. * * 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/config.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> /* * 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_REQ_MAY_SLEEP 0x00000200 #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 #define CRYPTO_DIR_ENCRYPT 1 #define CRYPTO_DIR_DECRYPT 0 struct scatterlist; struct crypto_tfm; struct cipher_desc { struct crypto_tfm *tfm; void (*crfn)(void *ctx, u8 *dst, const u8 *src); unsigned int (*prfn)(const struct cipher_desc *desc, u8 *dst, const u8 *src, unsigned int nbytes); void *info; }; /* * 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); unsigned int (*cia_encrypt_ecb)(const struct cipher_desc *desc, u8 *dst, const u8 *src, unsigned int nbytes); unsigned int (*cia_decrypt_ecb)(const struct cipher_desc *desc, u8 *dst, const u8 *src, unsigned int nbytes); unsigned int (*cia_encrypt_cbc)(const struct cipher_desc *desc, u8 *dst, const u8 *src, unsigned int nbytes); unsigned int (*cia_decrypt_cbc)(const struct cipher_desc *desc, u8 *dst, const u8 *src, unsigned int nbytes); }; 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; unsigned int cra_alignmask; int cra_priority; const char cra_name[CRYPTO_MAX_ALG_NAME]; const char cra_driver_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. */ #ifdef CONFIG_CRYPTO int crypto_alg_available(const char *name, u32 flags); #else static inline int crypto_alg_available(const char *name, u32 flags) { return 0; } #endif /* * 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 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); #ifdef CONFIG_CRYPTO_HMAC void *dit_hmac_block; #endif }; 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) { return module_name(tfm->__crt_alg->cra_module); } 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; } static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm) { return tfm->__crt_alg->cra_alignmask; } static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm) { return (void *)&tfm[1]; } /* * 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); } /* * HMAC support. */ #ifdef CONFIG_CRYPTO_HMAC void crypto_hmac_init(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen); void crypto_hmac_update(struct crypto_tfm *tfm, struct scatterlist *sg, unsigned int nsg); void crypto_hmac_final(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen, u8 *out); void crypto_hmac(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen, struct scatterlist *sg, unsigned int nsg, u8 *out); #endif /* CONFIG_CRYPTO_HMAC */ #endif /* _LINUX_CRYPTO_H */