161da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu/* 261da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * Symmetric key ciphers. 361da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * 461da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au> 561da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * 661da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * This program is free software; you can redistribute it and/or modify it 761da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * under the terms of the GNU General Public License as published by the Free 861da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * Software Foundation; either version 2 of the License, or (at your option) 961da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * any later version. 1061da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * 1161da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu */ 1261da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu 1361da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu#ifndef _CRYPTO_SKCIPHER_H 1461da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu#define _CRYPTO_SKCIPHER_H 1561da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu 1661da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu#include <linux/crypto.h> 1703bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu#include <linux/kernel.h> 1803bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu#include <linux/slab.h> 1961da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu 2061da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu/** 2161da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * struct skcipher_givcrypt_request - Crypto request with IV generation 2261da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * @seq: Sequence number for IV generation 2361da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * @giv: Space for generated IV 2461da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu * @creq: The crypto request itself 2561da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu */ 2661da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xustruct skcipher_givcrypt_request { 2761da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu u64 seq; 2861da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu u8 *giv; 2961da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu 3061da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu struct ablkcipher_request creq; 3161da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu}; 3261da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu 3361da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xustatic inline struct crypto_ablkcipher *skcipher_givcrypt_reqtfm( 3461da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu struct skcipher_givcrypt_request *req) 3561da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu{ 3661da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu return crypto_ablkcipher_reqtfm(&req->creq); 3761da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu} 3861da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu 3903bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline int crypto_skcipher_givencrypt( 4003bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct skcipher_givcrypt_request *req) 4103bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 4203bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct ablkcipher_tfm *crt = 4303bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req)); 4403bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu return crt->givencrypt(req); 4503bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu}; 4603bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 4703bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline int crypto_skcipher_givdecrypt( 4803bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct skcipher_givcrypt_request *req) 4903bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 5003bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct ablkcipher_tfm *crt = 5103bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req)); 5203bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu return crt->givdecrypt(req); 5303bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu}; 5403bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 5503bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline void skcipher_givcrypt_set_tfm( 5603bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct skcipher_givcrypt_request *req, struct crypto_ablkcipher *tfm) 5703bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 5803bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu req->creq.base.tfm = crypto_ablkcipher_tfm(tfm); 5903bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu} 6003bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 6103bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline struct skcipher_givcrypt_request *skcipher_givcrypt_cast( 6203bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct crypto_async_request *req) 6303bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 6403bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu return container_of(ablkcipher_request_cast(req), 6503bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct skcipher_givcrypt_request, creq); 6603bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu} 6703bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 6803bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline struct skcipher_givcrypt_request *skcipher_givcrypt_alloc( 6903bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct crypto_ablkcipher *tfm, gfp_t gfp) 7003bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 7103bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct skcipher_givcrypt_request *req; 7203bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 7303bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu req = kmalloc(sizeof(struct skcipher_givcrypt_request) + 7403bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu crypto_ablkcipher_reqsize(tfm), gfp); 7503bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 7603bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu if (likely(req)) 7703bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu skcipher_givcrypt_set_tfm(req, tfm); 7803bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 7903bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu return req; 8003bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu} 8103bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 8203bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline void skcipher_givcrypt_free(struct skcipher_givcrypt_request *req) 8303bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 8403bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu kfree(req); 8503bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu} 8603bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 8703bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline void skcipher_givcrypt_set_callback( 8803bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct skcipher_givcrypt_request *req, u32 flags, 8903bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu crypto_completion_t complete, void *data) 9003bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 9103bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu ablkcipher_request_set_callback(&req->creq, flags, complete, data); 9203bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu} 9303bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 9403bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline void skcipher_givcrypt_set_crypt( 9503bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct skcipher_givcrypt_request *req, 9603bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct scatterlist *src, struct scatterlist *dst, 9703bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu unsigned int nbytes, void *iv) 9803bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 9903bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu ablkcipher_request_set_crypt(&req->creq, src, dst, nbytes, iv); 10003bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu} 10103bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 10203bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xustatic inline void skcipher_givcrypt_set_giv( 10303bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu struct skcipher_givcrypt_request *req, u8 *giv, u64 seq) 10403bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu{ 10503bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu req->giv = giv; 10603bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu req->seq = seq; 10703bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu} 10803bf712fb4defc7831c727d1e32d0269f7f96de0Herbert Xu 10961da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu#endif /* _CRYPTO_SKCIPHER_H */ 11061da88e2b800eed2b03834a73c46cc89ad48716dHerbert Xu 111