| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 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 | */ |
| 26 | struct aead_givcrypt_request { |
| 27 | u64 seq; |
| 28 | u8 *giv; |
| 29 | |
| 30 | struct aead_request areq; |
| 31 | }; |
| 32 | |
| 33 | static inline struct crypto_aead *aead_givcrypt_reqtfm( |
| 34 | struct aead_givcrypt_request *req) |
| 35 | { |
| 36 | return crypto_aead_reqtfm(&req->areq); |
| 37 | } |
| 38 | |
| 39 | static 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 | |
| 45 | static 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 | |
| 51 | static 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 | |
| 57 | static 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 | |
| 71 | static inline void aead_givcrypt_free(struct aead_givcrypt_request *req) |
| 72 | { |
| 73 | kfree(req); |
| 74 | } |
| 75 | |
| 76 | static 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 | |
| 83 | static 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 | |
| 91 | static 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 | |
| 98 | static 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 */ |