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(tfm, src, slen, dst, 26 dlen); 27 } 28 29 static int crypto_decompress(struct crypto_tfm *tfm, 30 const u8 *src, unsigned int slen, 31 u8 *dst, unsigned int *dlen) 32 { 33 return tfm->__crt_alg->cra_compress.coa_decompress(tfm, src, slen, dst, 34 dlen); 35 } 36 37 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags) 38 { 39 return flags ? -EINVAL : 0; 40 } 41 42 int crypto_init_compress_ops(struct crypto_tfm *tfm) 43 { 44 int ret = 0; 45 struct compress_tfm *ops = &tfm->crt_compress; 46 47 ret = tfm->__crt_alg->cra_compress.coa_init(tfm); 48 if (ret) 49 goto out; 50 51 ops->cot_compress = crypto_compress; 52 ops->cot_decompress = crypto_decompress; 53 54 out: 55 return ret; 56 } 57 58 void crypto_exit_compress_ops(struct crypto_tfm *tfm) 59 { 60 tfm->__crt_alg->cra_compress.coa_exit(tfm); 61 } 62