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 34static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask) 35{ 36 return 0; 37} 38 39static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg) 40{ 41 return alg->cra_ctxsize; 42} 43 44static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm) 45{ 46 return 0; 47} 48 49static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) 50 __attribute__ ((unused)); 51static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg) 52{ 53 seq_printf(m, "type : pcomp\n"); 54} 55 56static 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 69struct 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} 74EXPORT_SYMBOL_GPL(crypto_alloc_pcomp); 75 76int 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} 86EXPORT_SYMBOL_GPL(crypto_register_pcomp); 87 88int crypto_unregister_pcomp(struct pcomp_alg *alg) 89{ 90 return crypto_unregister_alg(&alg->base); 91} 92EXPORT_SYMBOL_GPL(crypto_unregister_pcomp); 93 94MODULE_LICENSE("GPL"); 95MODULE_DESCRIPTION("Partial (de)compression type"); 96MODULE_AUTHOR("Sony Corporation"); 97