1/* 2 * Cryptographic Hash operations. 3 * 4 * Copyright (c) 2006 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#include <linux/errno.h> 13#include <linux/kernel.h> 14#include <linux/module.h> 15#include <linux/seq_file.h> 16 17#include "internal.h" 18 19static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type, 20 u32 mask) 21{ 22 return alg->cra_ctxsize; 23} 24 25static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) 26{ 27 struct hash_tfm *crt = &tfm->crt_hash; 28 struct hash_alg *alg = &tfm->__crt_alg->cra_hash; 29 30 if (alg->digestsize > crypto_tfm_alg_blocksize(tfm)) 31 return -EINVAL; 32 33 crt->init = alg->init; 34 crt->update = alg->update; 35 crt->final = alg->final; 36 crt->digest = alg->digest; 37 crt->setkey = alg->setkey; 38 crt->digestsize = alg->digestsize; 39 40 return 0; 41} 42 43static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg) 44 __attribute__ ((unused)); 45static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg) 46{ 47 seq_printf(m, "type : hash\n"); 48 seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); 49 seq_printf(m, "digestsize : %u\n", alg->cra_hash.digestsize); 50} 51 52const struct crypto_type crypto_hash_type = { 53 .ctxsize = crypto_hash_ctxsize, 54 .init = crypto_init_hash_ops, 55#ifdef CONFIG_PROC_FS 56 .show = crypto_hash_show, 57#endif 58}; 59EXPORT_SYMBOL_GPL(crypto_hash_type); 60 61MODULE_LICENSE("GPL"); 62MODULE_DESCRIPTION("Generic cryptographic hash type"); 63