| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * Compression operations. |
| 5 | * |
| 6 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the Free |
| 10 | * Software Foundation; either version 2 of the License, or (at your option) |
| 11 | * any later version. |
| 12 | * |
| 13 | */ |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/crypto.h> |
| 16 | #include <linux/errno.h> |
| 17 | #include <asm/scatterlist.h> |
| 18 | #include <linux/string.h> |
| 19 | #include "internal.h" |
| 20 | |
| 21 | static int crypto_compress(struct crypto_tfm *tfm, |
| 22 | const u8 *src, unsigned int slen, |
| 23 | u8 *dst, unsigned int *dlen) |
| 24 | { |
| 25 | return tfm->__crt_alg->cra_compress.coa_compress(crypto_tfm_ctx(tfm), |
| 26 | src, slen, dst, |
| 27 | dlen); |
| 28 | } |
| 29 | |
| 30 | static int crypto_decompress(struct crypto_tfm *tfm, |
| 31 | const u8 *src, unsigned int slen, |
| 32 | u8 *dst, unsigned int *dlen) |
| 33 | { |
| 34 | return tfm->__crt_alg->cra_compress.coa_decompress(crypto_tfm_ctx(tfm), |
| 35 | src, slen, dst, |
| 36 | dlen); |
| 37 | } |
| 38 | |
| 39 | int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags) |
| 40 | { |
| 41 | return flags ? -EINVAL : 0; |
| 42 | } |
| 43 | |
| 44 | int crypto_init_compress_ops(struct crypto_tfm *tfm) |
| 45 | { |
| 46 | int ret = 0; |
| 47 | struct compress_tfm *ops = &tfm->crt_compress; |
| 48 | |
| 49 | ret = tfm->__crt_alg->cra_compress.coa_init(crypto_tfm_ctx(tfm)); |
| 50 | if (ret) |
| 51 | goto out; |
| 52 | |
| 53 | ops->cot_compress = crypto_compress; |
| 54 | ops->cot_decompress = crypto_decompress; |
| 55 | |
| 56 | out: |
| 57 | return ret; |
| 58 | } |
| 59 | |
| 60 | void crypto_exit_compress_ops(struct crypto_tfm *tfm) |
| 61 | { |
| 62 | tfm->__crt_alg->cra_compress.coa_exit(crypto_tfm_ctx(tfm)); |
| 63 | } |