root/crypto/compress.c

/*
 * Cryptographic API.
 *
 * Compression operations.
 *
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) 
 * any later version.
 *
 */
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/errno.h>
#include <asm/scatterlist.h>
#include <linux/string.h>
#include "internal.h"

static int crypto_compress(struct crypto_tfm *tfm,
                            const u8 *src, unsigned int slen,
                            u8 *dst, unsigned int *dlen)
{
        return tfm->__crt_alg->cra_compress.coa_compress(crypto_tfm_ctx(tfm),
                                                         src, slen, dst,
                                                         dlen);
}

static int crypto_decompress(struct crypto_tfm *tfm,
                             const u8 *src, unsigned int slen,
                             u8 *dst, unsigned int *dlen)
{
        return tfm->__crt_alg->cra_compress.coa_decompress(crypto_tfm_ctx(tfm),
                                                           src, slen, dst,
                                                           dlen);
}

int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
{
        return flags ? -EINVAL : 0;
}

int crypto_init_compress_ops(struct crypto_tfm *tfm)
{
        int ret = 0;
        struct compress_tfm *ops = &tfm->crt_compress;
        
        ret = tfm->__crt_alg->cra_compress.coa_init(crypto_tfm_ctx(tfm));
        if (ret)
                goto out;

        ops->cot_compress = crypto_compress;
        ops->cot_decompress = crypto_decompress;
        
out:
        return ret;
}

void crypto_exit_compress_ops(struct crypto_tfm *tfm)
{
        tfm->__crt_alg->cra_compress.coa_exit(crypto_tfm_ctx(tfm));
}