1/* 2 * AEAD: Authenticated Encryption with Associated Data 3 * 4 * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the Free 8 * Software Foundation; either version 2 of the License, or (at your option) 9 * any later version. 10 * 11 */ 12 13#ifndef _CRYPTO_AEAD_H 14#define _CRYPTO_AEAD_H 15 16#include <linux/crypto.h> 17#include <linux/kernel.h> 18#include <linux/slab.h> 19 20/** 21 * struct aead_givcrypt_request - AEAD request with IV generation 22 * @seq: Sequence number for IV generation 23 * @giv: Space for generated IV 24 * @areq: The AEAD request itself 25 */ 26struct aead_givcrypt_request { 27 u64 seq; 28 u8 *giv; 29 30 struct aead_request areq; 31}; 32 33static inline struct crypto_aead *aead_givcrypt_reqtfm( 34 struct aead_givcrypt_request *req) 35{ 36 return crypto_aead_reqtfm(&req->areq); 37} 38 39static inline int crypto_aead_givencrypt(struct aead_givcrypt_request *req) 40{ 41 struct aead_tfm *crt = crypto_aead_crt(aead_givcrypt_reqtfm(req)); 42 return crt->givencrypt(req); 43}; 44 45static inline int crypto_aead_givdecrypt(struct aead_givcrypt_request *req) 46{ 47 struct aead_tfm *crt = crypto_aead_crt(aead_givcrypt_reqtfm(req)); 48 return crt->givdecrypt(req); 49}; 50 51static inline void aead_givcrypt_set_tfm(struct aead_givcrypt_request *req, 52 struct crypto_aead *tfm) 53{ 54 req->areq.base.tfm = crypto_aead_tfm(tfm); 55} 56 57static inline struct aead_givcrypt_request *aead_givcrypt_alloc( 58 struct crypto_aead *tfm, gfp_t gfp) 59{ 60 struct aead_givcrypt_request *req; 61 62 req = kmalloc(sizeof(struct aead_givcrypt_request) + 63 crypto_aead_reqsize(tfm), gfp); 64 65 if (likely(req)) 66 aead_givcrypt_set_tfm(req, tfm); 67 68 return req; 69} 70 71static inline void aead_givcrypt_free(struct aead_givcrypt_request *req) 72{ 73 kfree(req); 74} 75 76static inline void aead_givcrypt_set_callback( 77 struct aead_givcrypt_request *req, u32 flags, 78 crypto_completion_t complete, void *data) 79{ 80 aead_request_set_callback(&req->areq, flags, complete, data); 81} 82 83static inline void aead_givcrypt_set_crypt(struct aead_givcrypt_request *req, 84 struct scatterlist *src, 85 struct scatterlist *dst, 86 unsigned int nbytes, void *iv) 87{ 88 aead_request_set_crypt(&req->areq, src, dst, nbytes, iv); 89} 90 91static inline void aead_givcrypt_set_assoc(struct aead_givcrypt_request *req, 92 struct scatterlist *assoc, 93 unsigned int assoclen) 94{ 95 aead_request_set_assoc(&req->areq, assoc, assoclen); 96} 97 98static inline void aead_givcrypt_set_giv(struct aead_givcrypt_request *req, 99 u8 *giv, u64 seq) 100{ 101 req->giv = giv; 102 req->seq = seq; 103} 104 105#endif /* _CRYPTO_AEAD_H */ 106