1 /* 2 * Hash: Hash algorithms under the crypto API 3 * 4 * Copyright (c) 2008 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_HASH_H 14 #define _CRYPTO_HASH_H 15 16 #include <linux/crypto.h> 17 18 struct crypto_ahash { 19 struct crypto_tfm base; 20 }; 21 22 static inline struct crypto_ahash *__crypto_ahash_cast(struct crypto_tfm *tfm) 23 { 24 return (struct crypto_ahash *)tfm; 25 } 26 27 static inline struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, 28 u32 type, u32 mask) 29 { 30 type &= ~CRYPTO_ALG_TYPE_MASK; 31 mask &= ~CRYPTO_ALG_TYPE_MASK; 32 type |= CRYPTO_ALG_TYPE_AHASH; 33 mask |= CRYPTO_ALG_TYPE_AHASH_MASK; 34 35 return __crypto_ahash_cast(crypto_alloc_base(alg_name, type, mask)); 36 } 37 38 static inline struct crypto_tfm *crypto_ahash_tfm(struct crypto_ahash *tfm) 39 { 40 return &tfm->base; 41 } 42 43 static inline void crypto_free_ahash(struct crypto_ahash *tfm) 44 { 45 crypto_free_tfm(crypto_ahash_tfm(tfm)); 46 } 47 48 static inline unsigned int crypto_ahash_alignmask( 49 struct crypto_ahash *tfm) 50 { 51 return crypto_tfm_alg_alignmask(crypto_ahash_tfm(tfm)); 52 } 53 54 static inline struct ahash_tfm *crypto_ahash_crt(struct crypto_ahash *tfm) 55 { 56 return &crypto_ahash_tfm(tfm)->crt_ahash; 57 } 58 59 static inline unsigned int crypto_ahash_digestsize(struct crypto_ahash *tfm) 60 { 61 return crypto_ahash_crt(tfm)->digestsize; 62 } 63 64 static inline u32 crypto_ahash_get_flags(struct crypto_ahash *tfm) 65 { 66 return crypto_tfm_get_flags(crypto_ahash_tfm(tfm)); 67 } 68 69 static inline void crypto_ahash_set_flags(struct crypto_ahash *tfm, u32 flags) 70 { 71 crypto_tfm_set_flags(crypto_ahash_tfm(tfm), flags); 72 } 73 74 static inline void crypto_ahash_clear_flags(struct crypto_ahash *tfm, u32 flags) 75 { 76 crypto_tfm_clear_flags(crypto_ahash_tfm(tfm), flags); 77 } 78 79 static inline struct crypto_ahash *crypto_ahash_reqtfm( 80 struct ahash_request *req) 81 { 82 return __crypto_ahash_cast(req->base.tfm); 83 } 84 85 static inline unsigned int crypto_ahash_reqsize(struct crypto_ahash *tfm) 86 { 87 return crypto_ahash_crt(tfm)->reqsize; 88 } 89 90 static inline int crypto_ahash_setkey(struct crypto_ahash *tfm, 91 const u8 *key, unsigned int keylen) 92 { 93 struct ahash_tfm *crt = crypto_ahash_crt(tfm); 94 95 return crt->setkey(tfm, key, keylen); 96 } 97 98 static inline int crypto_ahash_digest(struct ahash_request *req) 99 { 100 struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); 101 return crt->digest(req); 102 } 103 104 static inline int crypto_ahash_init(struct ahash_request *req) 105 { 106 struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); 107 return crt->init(req); 108 } 109 110 static inline int crypto_ahash_update(struct ahash_request *req) 111 { 112 struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); 113 return crt->update(req); 114 } 115 116 static inline int crypto_ahash_final(struct ahash_request *req) 117 { 118 struct ahash_tfm *crt = crypto_ahash_crt(crypto_ahash_reqtfm(req)); 119 return crt->final(req); 120 } 121 122 static inline void ahash_request_set_tfm(struct ahash_request *req, 123 struct crypto_ahash *tfm) 124 { 125 req->base.tfm = crypto_ahash_tfm(tfm); 126 } 127 128 static inline struct ahash_request *ahash_request_alloc( 129 struct crypto_ahash *tfm, gfp_t gfp) 130 { 131 struct ahash_request *req; 132 133 req = kmalloc(sizeof(struct ahash_request) + 134 crypto_ahash_reqsize(tfm), gfp); 135 136 if (likely(req)) 137 ahash_request_set_tfm(req, tfm); 138 139 return req; 140 } 141 142 static inline void ahash_request_free(struct ahash_request *req) 143 { 144 kfree(req); 145 } 146 147 static inline struct ahash_request *ahash_request_cast( 148 struct crypto_async_request *req) 149 { 150 return container_of(req, struct ahash_request, base); 151 } 152 153 static inline void ahash_request_set_callback(struct ahash_request *req, 154 u32 flags, 155 crypto_completion_t complete, 156 void *data) 157 { 158 req->base.complete = complete; 159 req->base.data = data; 160 req->base.flags = flags; 161 } 162 163 static inline void ahash_request_set_crypt(struct ahash_request *req, 164 struct scatterlist *src, u8 *result, 165 unsigned int nbytes) 166 { 167 req->src = src; 168 req->nbytes = nbytes; 169 req->result = result; 170 } 171 172 #endif /* _CRYPTO_HASH_H */ 173