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3a282bd2e7
This patch finally makes the givencrypt/givdecrypt operations available to users by adding crypto_aead_givencrypt and crypto_aead_givdecrypt. A suite of helpers to allocate and fill in the request is also available. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/*
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* AEAD: Authenticated Encryption with Associated Data
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*
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* Copyright (c) 2007 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_AEAD_H
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#define _CRYPTO_AEAD_H
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#include <linux/crypto.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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/**
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* struct aead_givcrypt_request - AEAD request with IV generation
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* @seq: Sequence number for IV generation
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* @giv: Space for generated IV
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* @areq: The AEAD request itself
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*/
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struct aead_givcrypt_request {
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u64 seq;
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u8 *giv;
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struct aead_request areq;
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};
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static inline struct crypto_aead *aead_givcrypt_reqtfm(
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struct aead_givcrypt_request *req)
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{
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return crypto_aead_reqtfm(&req->areq);
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}
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static inline int crypto_aead_givencrypt(struct aead_givcrypt_request *req)
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{
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struct aead_tfm *crt = crypto_aead_crt(aead_givcrypt_reqtfm(req));
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return crt->givencrypt(req);
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};
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static inline int crypto_aead_givdecrypt(struct aead_givcrypt_request *req)
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{
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struct aead_tfm *crt = crypto_aead_crt(aead_givcrypt_reqtfm(req));
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return crt->givdecrypt(req);
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};
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static inline void aead_givcrypt_set_tfm(struct aead_givcrypt_request *req,
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struct crypto_aead *tfm)
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{
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req->areq.base.tfm = crypto_aead_tfm(tfm);
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}
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static inline struct aead_givcrypt_request *aead_givcrypt_alloc(
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struct crypto_aead *tfm, gfp_t gfp)
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{
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struct aead_givcrypt_request *req;
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req = kmalloc(sizeof(struct aead_givcrypt_request) +
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crypto_aead_reqsize(tfm), gfp);
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if (likely(req))
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aead_givcrypt_set_tfm(req, tfm);
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return req;
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}
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static inline void aead_givcrypt_free(struct aead_givcrypt_request *req)
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{
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kfree(req);
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}
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static inline void aead_givcrypt_set_callback(
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struct aead_givcrypt_request *req, u32 flags,
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crypto_completion_t complete, void *data)
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{
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aead_request_set_callback(&req->areq, flags, complete, data);
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}
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static inline void aead_givcrypt_set_crypt(struct aead_givcrypt_request *req,
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struct scatterlist *src,
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struct scatterlist *dst,
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unsigned int nbytes, void *iv)
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{
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aead_request_set_crypt(&req->areq, src, dst, nbytes, iv);
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}
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static inline void aead_givcrypt_set_assoc(struct aead_givcrypt_request *req,
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struct scatterlist *assoc,
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unsigned int assoclen)
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{
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aead_request_set_assoc(&req->areq, assoc, assoclen);
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}
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static inline void aead_givcrypt_set_giv(struct aead_givcrypt_request *req,
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u8 *giv, u64 seq)
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{
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req->giv = giv;
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req->seq = seq;
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}
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#endif /* _CRYPTO_AEAD_H */
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