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| 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * Partial (de)compression operations. |
| 5 | * |
| 6 | * Copyright 2008 Sony Corporation |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; version 2 of the License. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program. |
| 19 | * If not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/crypto.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/seq_file.h> |
| 26 | #include <linux/string.h> |
| 27 | |
| 28 | #include <crypto/compress.h> |
| 29 | #include <crypto/internal/compress.h> |
| 30 | |
| 31 | #include "internal.h" |
| 32 | |
| 33 | |
| 34 | static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask) |
| 35 | { |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg) |
| 40 | { |
| 41 | return alg->cra_ctxsize; |
| 42 | } |
| 43 | |
| 44 | static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm) |
| 45 | { |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) |
| 50 | __attribute__ ((unused)); |
| 51 | static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) |
| 52 | { |
| 53 | seq_printf(m, "type : pcomp\n"); |
| 54 | } |
| 55 | |
| 56 | static const struct crypto_type crypto_pcomp_type = { |
| 57 | .extsize = crypto_pcomp_extsize, |
| 58 | .init = crypto_pcomp_init, |
| 59 | .init_tfm = crypto_pcomp_init_tfm, |
| 60 | #ifdef CONFIG_PROC_FS |
| 61 | .show = crypto_pcomp_show, |
| 62 | #endif |
| 63 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
| 64 | .maskset = CRYPTO_ALG_TYPE_MASK, |
| 65 | .type = CRYPTO_ALG_TYPE_PCOMPRESS, |
| 66 | .tfmsize = offsetof(struct crypto_pcomp, base), |
| 67 | }; |
| 68 | |
| 69 | struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type, |
| 70 | u32 mask) |
| 71 | { |
| 72 | return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask); |
| 73 | } |
| 74 | EXPORT_SYMBOL_GPL(crypto_alloc_pcomp); |
| 75 | |
| 76 | int crypto_register_pcomp(struct pcomp_alg *alg) |
| 77 | { |
| 78 | struct crypto_alg *base = &alg->base; |
| 79 | |
| 80 | base->cra_type = &crypto_pcomp_type; |
| 81 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
| 82 | base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS; |
| 83 | |
| 84 | return crypto_register_alg(base); |
| 85 | } |
| 86 | EXPORT_SYMBOL_GPL(crypto_register_pcomp); |
| 87 | |
| 88 | int crypto_unregister_pcomp(struct pcomp_alg *alg) |
| 89 | { |
| 90 | return crypto_unregister_alg(&alg->base); |
| 91 | } |
| 92 | EXPORT_SYMBOL_GPL(crypto_unregister_pcomp); |
| 93 | |
| 94 | MODULE_LICENSE("GPL"); |
| 95 | MODULE_DESCRIPTION("Partial (de)compression type"); |
| 96 | MODULE_AUTHOR("Sony Corporation"); |
| 97 |
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Tags:
od-2011-09-04
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v2.6.34-rc5
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v3.9
