projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a1d2f095 GU |
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 | ||
| 30 | #include "internal.h" | |
| 31 | ||
| 32 | ||
| 33 | static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask) | |
| 34 | { | |
| 35 | return 0; | |
| 36 | } | |
| 37 | ||
| 38 | static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg, | |
| 39 | const struct crypto_type *frontend) | |
| 40 | { | |
| 41 | return alg->cra_ctxsize; | |
| 42 | } | |
| 43 | ||
| 44 | static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm, | |
| 45 | const struct crypto_type *frontend) | |
| 46 | { | |
| 47 | return 0; | |
| 48 | } | |
| 49 | ||
| 50 | static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) | |
| 51 | __attribute__ ((unused)); | |
| 52 | static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) | |
| 53 | { | |
| 54 | seq_printf(m, "type : pcomp\n"); | |
| 55 | } | |
| 56 | ||
| 57 | static const struct crypto_type crypto_pcomp_type = { | |
| 58 | .extsize = crypto_pcomp_extsize, | |
| 59 | .init = crypto_pcomp_init, | |
| 60 | .init_tfm = crypto_pcomp_init_tfm, | |
| 61 | #ifdef CONFIG_PROC_FS | |
| 62 | .show = crypto_pcomp_show, | |
| 63 | #endif | |
| 64 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, | |
| 65 | .maskset = CRYPTO_ALG_TYPE_MASK, | |
| 66 | .type = CRYPTO_ALG_TYPE_PCOMPRESS, | |
| 67 | .tfmsize = offsetof(struct crypto_pcomp, base), | |
| 68 | }; | |
| 69 | ||
| 70 | struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type, | |
| 71 | u32 mask) | |
| 72 | { | |
| 73 | return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask); | |
| 74 | } | |
| 75 | EXPORT_SYMBOL_GPL(crypto_alloc_pcomp); | |
| 76 | ||
| 77 | int crypto_register_pcomp(struct pcomp_alg *alg) | |
| 78 | { | |
| 79 | struct crypto_alg *base = &alg->base; | |
| 80 | ||
| 81 | base->cra_type = &crypto_pcomp_type; | |
| 82 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; | |
| 83 | base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS; | |
| 84 | ||
| 85 | return crypto_register_alg(base); | |
| 86 | } | |
| 87 | EXPORT_SYMBOL_GPL(crypto_register_pcomp); | |
| 88 | ||
| 89 | int crypto_unregister_pcomp(struct pcomp_alg *alg) | |
| 90 | { | |
| 91 | return crypto_unregister_alg(&alg->base); | |
| 92 | } | |
| 93 | EXPORT_SYMBOL_GPL(crypto_unregister_pcomp); | |
| 94 | ||
| 95 | MODULE_LICENSE("GPL"); | |
| 96 | MODULE_DESCRIPTION("Partial (de)compression type"); | |
| 97 | MODULE_AUTHOR("Sony Corporation"); |