Herbert Xu | 055bcee | 2006-08-19 22:24:23 +1000 | [diff] [blame] | 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 | |
Herbert Xu | 27d2a33 | 2007-01-24 20:50:26 +1100 | [diff] [blame] | 19 | static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type, |
| 20 | u32 mask) |
Herbert Xu | 055bcee | 2006-08-19 22:24:23 +1000 | [diff] [blame] | 21 | { |
| 22 | return alg->cra_ctxsize; |
| 23 | } |
| 24 | |
Herbert Xu | 27d2a33 | 2007-01-24 20:50:26 +1100 | [diff] [blame] | 25 | static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) |
Herbert Xu | 055bcee | 2006-08-19 22:24:23 +1000 | [diff] [blame] | 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 | |
| 43 | static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg) |
Herbert Xu | 03f5d8c | 2006-12-31 10:42:06 +1100 | [diff] [blame^] | 44 | __attribute__ ((unused)); |
Herbert Xu | 055bcee | 2006-08-19 22:24:23 +1000 | [diff] [blame] | 45 | static 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 | |
| 52 | const 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 | }; |
| 59 | EXPORT_SYMBOL_GPL(crypto_hash_type); |
| 60 | |
| 61 | MODULE_LICENSE("GPL"); |
| 62 | MODULE_DESCRIPTION("Generic cryptographic hash type"); |