2008-07-10 02:01:22 -06:00
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/*
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* Hash: Hash algorithms under the crypto API
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*
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* Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _CRYPTO_HASH_H
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#define _CRYPTO_HASH_H
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#include <linux/crypto.h>
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2009-07-13 22:28:26 -06:00
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struct crypto_ahash;
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2014-11-11 21:26:03 -07:00
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/**
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* DOC: Message Digest Algorithm Definitions
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*
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* These data structures define modular message digest algorithm
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* implementations, managed via crypto_register_ahash(),
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* crypto_register_shash(), crypto_unregister_ahash() and
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* crypto_unregister_shash().
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*/
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/**
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* struct hash_alg_common - define properties of message digest
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* @digestsize: Size of the result of the transformation. A buffer of this size
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* must be available to the @final and @finup calls, so they can
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* store the resulting hash into it. For various predefined sizes,
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* search include/crypto/ using
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* git grep _DIGEST_SIZE include/crypto.
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* @statesize: Size of the block for partial state of the transformation. A
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* buffer of this size must be passed to the @export function as it
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* will save the partial state of the transformation into it. On the
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* other side, the @import function will load the state from a
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* buffer of this size as well.
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*/
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2009-07-13 22:28:26 -06:00
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struct hash_alg_common {
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unsigned int digestsize;
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unsigned int statesize;
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struct crypto_alg base;
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};
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struct ahash_request {
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struct crypto_async_request base;
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unsigned int nbytes;
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struct scatterlist *src;
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u8 *result;
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2009-07-14 22:40:40 -06:00
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/* This field may only be used by the ahash API code. */
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void *priv;
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2009-07-13 22:28:26 -06:00
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void *__ctx[] CRYPTO_MINALIGN_ATTR;
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};
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2014-11-11 21:26:03 -07:00
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/**
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* struct ahash_alg - asynchronous message digest definition
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* @init: Initialize the transformation context. Intended only to initialize the
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* state of the HASH transformation at the begining. This shall fill in
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* the internal structures used during the entire duration of the whole
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* transformation. No data processing happens at this point.
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* @update: Push a chunk of data into the driver for transformation. This
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* function actually pushes blocks of data from upper layers into the
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* driver, which then passes those to the hardware as seen fit. This
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* function must not finalize the HASH transformation by calculating the
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* final message digest as this only adds more data into the
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* transformation. This function shall not modify the transformation
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* context, as this function may be called in parallel with the same
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* transformation object. Data processing can happen synchronously
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* [SHASH] or asynchronously [AHASH] at this point.
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* @final: Retrieve result from the driver. This function finalizes the
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* transformation and retrieves the resulting hash from the driver and
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* pushes it back to upper layers. No data processing happens at this
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* point.
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* @finup: Combination of @update and @final. This function is effectively a
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* combination of @update and @final calls issued in sequence. As some
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* hardware cannot do @update and @final separately, this callback was
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* added to allow such hardware to be used at least by IPsec. Data
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* processing can happen synchronously [SHASH] or asynchronously [AHASH]
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* at this point.
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* @digest: Combination of @init and @update and @final. This function
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* effectively behaves as the entire chain of operations, @init,
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* @update and @final issued in sequence. Just like @finup, this was
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* added for hardware which cannot do even the @finup, but can only do
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* the whole transformation in one run. Data processing can happen
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* synchronously [SHASH] or asynchronously [AHASH] at this point.
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* @setkey: Set optional key used by the hashing algorithm. Intended to push
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* optional key used by the hashing algorithm from upper layers into
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* the driver. This function can store the key in the transformation
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* context or can outright program it into the hardware. In the former
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* case, one must be careful to program the key into the hardware at
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* appropriate time and one must be careful that .setkey() can be
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* called multiple times during the existence of the transformation
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* object. Not all hashing algorithms do implement this function as it
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* is only needed for keyed message digests. SHAx/MDx/CRCx do NOT
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* implement this function. HMAC(MDx)/HMAC(SHAx)/CMAC(AES) do implement
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* this function. This function must be called before any other of the
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* @init, @update, @final, @finup, @digest is called. No data
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* processing happens at this point.
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* @export: Export partial state of the transformation. This function dumps the
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* entire state of the ongoing transformation into a provided block of
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* data so it can be @import 'ed back later on. This is useful in case
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* you want to save partial result of the transformation after
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* processing certain amount of data and reload this partial result
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* multiple times later on for multiple re-use. No data processing
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* happens at this point.
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* @import: Import partial state of the transformation. This function loads the
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* entire state of the ongoing transformation from a provided block of
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* data so the transformation can continue from this point onward. No
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* data processing happens at this point.
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*/
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2009-07-13 22:28:26 -06:00
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struct ahash_alg {
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int (*init)(struct ahash_request *req);
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int (*update)(struct ahash_request *req);
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int (*final)(struct ahash_request *req);
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int (*finup)(struct ahash_request *req);
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int (*digest)(struct ahash_request *req);
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int (*export)(struct ahash_request *req, void *out);
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int (*import)(struct ahash_request *req, const void *in);
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int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
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unsigned int keylen);
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struct hash_alg_common halg;
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};
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2008-08-30 23:47:27 -06:00
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struct shash_desc {
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struct crypto_shash *tfm;
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u32 flags;
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void *__ctx[] CRYPTO_MINALIGN_ATTR;
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};
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2014-09-07 23:05:09 -06:00
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#define SHASH_DESC_ON_STACK(shash, ctx) \
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char __##shash##_desc[sizeof(struct shash_desc) + \
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crypto_shash_descsize(ctx)] CRYPTO_MINALIGN_ATTR; \
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struct shash_desc *shash = (struct shash_desc *)__##shash##_desc
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2014-11-11 21:26:03 -07:00
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/**
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* struct shash_alg - synchronous message digest definition
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* @init: see struct ahash_alg
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* @update: see struct ahash_alg
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* @final: see struct ahash_alg
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* @finup: see struct ahash_alg
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* @digest: see struct ahash_alg
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* @export: see struct ahash_alg
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* @import: see struct ahash_alg
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* @setkey: see struct ahash_alg
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* @digestsize: see struct ahash_alg
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* @statesize: see struct ahash_alg
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* @dedcsize: Size of the operational state for the message digest. This state
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* size is the memory size that needs to be allocated for
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* shash_desc.__ctx
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* @base: internally used
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*/
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2008-08-30 23:47:27 -06:00
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struct shash_alg {
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int (*init)(struct shash_desc *desc);
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int (*update)(struct shash_desc *desc, const u8 *data,
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unsigned int len);
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int (*final)(struct shash_desc *desc, u8 *out);
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int (*finup)(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out);
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int (*digest)(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out);
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2009-07-09 06:30:57 -06:00
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int (*export)(struct shash_desc *desc, void *out);
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int (*import)(struct shash_desc *desc, const void *in);
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2008-08-30 23:47:27 -06:00
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int (*setkey)(struct crypto_shash *tfm, const u8 *key,
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unsigned int keylen);
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unsigned int descsize;
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2009-07-13 22:28:26 -06:00
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/* These fields must match hash_alg_common. */
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2009-07-15 07:16:05 -06:00
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unsigned int digestsize
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__attribute__ ((aligned(__alignof__(struct hash_alg_common))));
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2009-07-09 06:30:57 -06:00
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unsigned int statesize;
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2008-08-30 23:47:27 -06:00
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struct crypto_alg base;
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};
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2008-07-10 02:01:22 -06:00
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struct crypto_ahash {
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2009-07-13 22:28:26 -06:00
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int (*init)(struct ahash_request *req);
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int (*update)(struct ahash_request *req);
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int (*final)(struct ahash_request *req);
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int (*finup)(struct ahash_request *req);
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int (*digest)(struct ahash_request *req);
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int (*export)(struct ahash_request *req, void *out);
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int (*import)(struct ahash_request *req, const void *in);
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int (*setkey)(struct crypto_ahash *tfm, const u8 *key,
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unsigned int keylen);
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unsigned int reqsize;
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2008-07-10 02:01:22 -06:00
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struct crypto_tfm base;
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};
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2008-08-30 23:47:27 -06:00
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struct crypto_shash {
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2009-07-13 22:50:12 -06:00
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unsigned int descsize;
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2008-08-30 23:47:27 -06:00
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struct crypto_tfm base;
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};
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2008-07-10 02:01:22 -06:00
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static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm)
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{
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2009-07-13 22:28:26 -06:00
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return container_of(tfm, struct crypto_ahash, base);
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2008-07-10 02:01:22 -06:00
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}
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2009-07-13 22:28:26 -06:00
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struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type,
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u32 mask);
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2008-07-10 02:01:22 -06:00
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static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm)
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{
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return &tfm->base;
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}
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static inline void crypto_free_ahash(struct crypto_ahash *tfm)
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{
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2009-07-13 22:28:26 -06:00
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crypto_destroy_tfm(tfm, crypto_ahash_tfm(tfm));
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2008-07-10 02:01:22 -06:00
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}
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static inline unsigned int crypto_ahash_alignmask(
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struct crypto_ahash *tfm)
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{
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return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm));
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}
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2009-07-13 22:28:26 -06:00
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static inline struct hash_alg_common *__crypto_hash_alg_common(
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struct crypto_alg *alg)
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{
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return container_of(alg, struct hash_alg_common, base);
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}
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static inline struct hash_alg_common *crypto_hash_alg_common(
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struct crypto_ahash *tfm)
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2008-07-10 02:01:22 -06:00
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{
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2009-07-13 22:28:26 -06:00
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return __crypto_hash_alg_common(crypto_ahash_tfm(tfm)->__crt_alg);
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2008-07-10 02:01:22 -06:00
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}
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static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm)
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{
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2009-07-14 06:29:57 -06:00
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return crypto_hash_alg_common(tfm)->digestsize;
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2009-07-13 22:28:26 -06:00
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}
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static inline unsigned int crypto_ahash_statesize(struct crypto_ahash *tfm)
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{
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return crypto_hash_alg_common(tfm)->statesize;
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2008-07-10 02:01:22 -06:00
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}
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static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm)
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{
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return crypto_tfm_get_flags(crypto_ahash_tfm(tfm));
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}
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static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags)
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{
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crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags);
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}
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static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags)
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{
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crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags);
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}
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static inline struct crypto_ahash *crypto_ahash_reqtfm(
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struct ahash_request *req)
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{
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return __crypto_ahash_cast(req->base.tfm);
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}
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static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm)
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{
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2009-07-13 22:28:26 -06:00
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return tfm->reqsize;
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2008-07-10 02:01:22 -06:00
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}
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2008-11-02 06:38:11 -07:00
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static inline void *ahash_request_ctx(struct ahash_request *req)
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{
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return req->__ctx;
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}
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2009-07-14 22:40:40 -06:00
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int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
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unsigned int keylen);
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int crypto_ahash_finup(struct ahash_request *req);
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int crypto_ahash_final(struct ahash_request *req);
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int crypto_ahash_digest(struct ahash_request *req);
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2008-07-10 02:01:22 -06:00
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2009-07-13 22:28:26 -06:00
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static inline int crypto_ahash_export(struct ahash_request *req, void *out)
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2008-11-02 06:38:11 -07:00
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{
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2009-07-13 22:28:26 -06:00
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return crypto_ahash_reqtfm(req)->export(req, out);
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2008-11-02 06:38:11 -07:00
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}
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2009-07-13 22:28:26 -06:00
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static inline int crypto_ahash_import(struct ahash_request *req, const void *in)
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{
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return crypto_ahash_reqtfm(req)->import(req, in);
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}
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2008-11-02 06:38:11 -07:00
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2008-08-04 23:34:30 -06:00
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static inline int crypto_ahash_init(struct ahash_request *req)
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{
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2009-07-13 22:28:26 -06:00
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return crypto_ahash_reqtfm(req)->init(req);
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2008-08-04 23:34:30 -06:00
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}
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static inline int crypto_ahash_update(struct ahash_request *req)
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{
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2009-07-13 22:28:26 -06:00
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return crypto_ahash_reqtfm(req)->update(req);
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2008-08-04 23:34:30 -06:00
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}
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2008-07-10 02:01:22 -06:00
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static inline void ahash_request_set_tfm(struct ahash_request *req,
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struct crypto_ahash *tfm)
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{
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req->base.tfm = crypto_ahash_tfm(tfm);
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}
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static inline struct ahash_request *ahash_request_alloc(
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struct crypto_ahash *tfm, gfp_t gfp)
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{
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struct ahash_request *req;
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req = kmalloc(sizeof(struct ahash_request) +
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crypto_ahash_reqsize(tfm), gfp);
|
|
|
|
|
|
|
|
if (likely(req))
|
|
|
|
ahash_request_set_tfm(req, tfm);
|
|
|
|
|
|
|
|
return req;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void ahash_request_free(struct ahash_request *req)
|
|
|
|
{
|
2009-07-11 08:22:14 -06:00
|
|
|
kzfree(req);
|
2008-07-10 02:01:22 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct ahash_request *ahash_request_cast(
|
|
|
|
struct crypto_async_request *req)
|
|
|
|
{
|
|
|
|
return container_of(req, struct ahash_request, base);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void ahash_request_set_callback(struct ahash_request *req,
|
|
|
|
u32 flags,
|
2014-07-25 03:53:38 -06:00
|
|
|
crypto_completion_t compl,
|
2008-07-10 02:01:22 -06:00
|
|
|
void *data)
|
|
|
|
{
|
2014-07-25 03:53:38 -06:00
|
|
|
req->base.complete = compl;
|
2008-07-10 02:01:22 -06:00
|
|
|
req->base.data = data;
|
|
|
|
req->base.flags = flags;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void ahash_request_set_crypt(struct ahash_request *req,
|
|
|
|
struct scatterlist *src, u8 *result,
|
|
|
|
unsigned int nbytes)
|
|
|
|
{
|
|
|
|
req->src = src;
|
|
|
|
req->nbytes = nbytes;
|
|
|
|
req->result = result;
|
|
|
|
}
|
|
|
|
|
2008-08-30 23:47:27 -06:00
|
|
|
struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
|
|
|
|
u32 mask);
|
|
|
|
|
|
|
|
static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)
|
|
|
|
{
|
|
|
|
return &tfm->base;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void crypto_free_shash(struct crypto_shash *tfm)
|
|
|
|
{
|
2009-02-04 22:51:25 -07:00
|
|
|
crypto_destroy_tfm(tfm, crypto_shash_tfm(tfm));
|
2008-08-30 23:47:27 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned int crypto_shash_alignmask(
|
|
|
|
struct crypto_shash *tfm)
|
|
|
|
{
|
|
|
|
return crypto_tfm_alg_alignmask(crypto_shash_tfm(tfm));
|
|
|
|
}
|
|
|
|
|
2009-02-02 18:47:44 -07:00
|
|
|
static inline unsigned int crypto_shash_blocksize(struct crypto_shash *tfm)
|
|
|
|
{
|
|
|
|
return crypto_tfm_alg_blocksize(crypto_shash_tfm(tfm));
|
|
|
|
}
|
|
|
|
|
2008-08-30 23:47:27 -06:00
|
|
|
static inline struct shash_alg *__crypto_shash_alg(struct crypto_alg *alg)
|
|
|
|
{
|
|
|
|
return container_of(alg, struct shash_alg, base);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct shash_alg *crypto_shash_alg(struct crypto_shash *tfm)
|
|
|
|
{
|
|
|
|
return __crypto_shash_alg(crypto_shash_tfm(tfm)->__crt_alg);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
|
|
|
|
{
|
|
|
|
return crypto_shash_alg(tfm)->digestsize;
|
|
|
|
}
|
|
|
|
|
2009-07-09 06:30:57 -06:00
|
|
|
static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm)
|
|
|
|
{
|
|
|
|
return crypto_shash_alg(tfm)->statesize;
|
|
|
|
}
|
|
|
|
|
2008-08-30 23:47:27 -06:00
|
|
|
static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
|
|
|
|
{
|
|
|
|
return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void crypto_shash_set_flags(struct crypto_shash *tfm, u32 flags)
|
|
|
|
{
|
|
|
|
crypto_tfm_set_flags(crypto_shash_tfm(tfm), flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void crypto_shash_clear_flags(struct crypto_shash *tfm, u32 flags)
|
|
|
|
{
|
|
|
|
crypto_tfm_clear_flags(crypto_shash_tfm(tfm), flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned int crypto_shash_descsize(struct crypto_shash *tfm)
|
|
|
|
{
|
2009-07-13 22:50:12 -06:00
|
|
|
return tfm->descsize;
|
2008-08-30 23:47:27 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline void *shash_desc_ctx(struct shash_desc *desc)
|
|
|
|
{
|
|
|
|
return desc->__ctx;
|
|
|
|
}
|
|
|
|
|
|
|
|
int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
|
|
|
|
unsigned int keylen);
|
|
|
|
int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
|
|
|
|
unsigned int len, u8 *out);
|
|
|
|
|
2009-07-09 06:30:57 -06:00
|
|
|
static inline int crypto_shash_export(struct shash_desc *desc, void *out)
|
2008-11-02 06:38:11 -07:00
|
|
|
{
|
2009-07-09 06:30:57 -06:00
|
|
|
return crypto_shash_alg(desc->tfm)->export(desc, out);
|
2008-11-02 06:38:11 -07:00
|
|
|
}
|
|
|
|
|
2009-07-09 06:30:57 -06:00
|
|
|
static inline int crypto_shash_import(struct shash_desc *desc, const void *in)
|
|
|
|
{
|
|
|
|
return crypto_shash_alg(desc->tfm)->import(desc, in);
|
|
|
|
}
|
2008-11-02 06:38:11 -07:00
|
|
|
|
2008-08-30 23:47:27 -06:00
|
|
|
static inline int crypto_shash_init(struct shash_desc *desc)
|
|
|
|
{
|
|
|
|
return crypto_shash_alg(desc->tfm)->init(desc);
|
|
|
|
}
|
|
|
|
|
|
|
|
int crypto_shash_update(struct shash_desc *desc, const u8 *data,
|
|
|
|
unsigned int len);
|
|
|
|
int crypto_shash_final(struct shash_desc *desc, u8 *out);
|
|
|
|
int crypto_shash_finup(struct shash_desc *desc, const u8 *data,
|
|
|
|
unsigned int len, u8 *out);
|
|
|
|
|
2008-07-10 02:01:22 -06:00
|
|
|
#endif /* _CRYPTO_HASH_H */
|