302 lines
8.2 KiB
C
302 lines
8.2 KiB
C
/***********************license start************************************
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* Copyright (c) 2003-2017 Cavium, Inc.
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* All rights reserved.
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*
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* License: one of 'Cavium License' or 'GNU General Public License Version 2'
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*
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* This file is provided under the terms of the Cavium License (see below)
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* or under the terms of GNU General Public License, Version 2, as
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* published by the Free Software Foundation. When using or redistributing
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* this file, you may do so under either license.
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*
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* Cavium License: Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* * Neither the name of Cavium Inc. nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* This Software, including technical data, may be subject to U.S. export
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* control laws, including the U.S. Export Administration Act and its
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* associated regulations, and may be subject to export or import
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* regulations in other countries.
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*
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS
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* OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
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* RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
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* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
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* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY)
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* WARRANTIES OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A
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* PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET
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* ENJOYMENT, QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE
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* ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES
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* WITH YOU.
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***********************license end**************************************/
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#include "zip_crypto.h"
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static void zip_static_init_zip_ops(struct zip_operation *zip_ops,
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int lzs_flag)
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{
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zip_ops->flush = ZIP_FLUSH_FINISH;
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/* equivalent to level 6 of opensource zlib */
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zip_ops->speed = 1;
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if (!lzs_flag) {
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zip_ops->ccode = 0; /* Auto Huffman */
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zip_ops->lzs_flag = 0;
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zip_ops->format = ZLIB_FORMAT;
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} else {
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zip_ops->ccode = 3; /* LZS Encoding */
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zip_ops->lzs_flag = 1;
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zip_ops->format = LZS_FORMAT;
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}
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zip_ops->begin_file = 1;
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zip_ops->history_len = 0;
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zip_ops->end_file = 1;
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zip_ops->compcode = 0;
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zip_ops->csum = 1; /* Adler checksum desired */
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}
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static int zip_ctx_init(struct zip_kernel_ctx *zip_ctx, int lzs_flag)
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{
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struct zip_operation *comp_ctx = &zip_ctx->zip_comp;
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struct zip_operation *decomp_ctx = &zip_ctx->zip_decomp;
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zip_static_init_zip_ops(comp_ctx, lzs_flag);
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zip_static_init_zip_ops(decomp_ctx, lzs_flag);
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comp_ctx->input = zip_data_buf_alloc(MAX_INPUT_BUFFER_SIZE);
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if (!comp_ctx->input)
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return -ENOMEM;
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comp_ctx->output = zip_data_buf_alloc(MAX_OUTPUT_BUFFER_SIZE);
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if (!comp_ctx->output)
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goto err_comp_input;
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decomp_ctx->input = zip_data_buf_alloc(MAX_INPUT_BUFFER_SIZE);
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if (!decomp_ctx->input)
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goto err_comp_output;
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decomp_ctx->output = zip_data_buf_alloc(MAX_OUTPUT_BUFFER_SIZE);
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if (!decomp_ctx->output)
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goto err_decomp_input;
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return 0;
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err_decomp_input:
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zip_data_buf_free(decomp_ctx->input, MAX_INPUT_BUFFER_SIZE);
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err_comp_output:
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zip_data_buf_free(comp_ctx->output, MAX_OUTPUT_BUFFER_SIZE);
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err_comp_input:
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zip_data_buf_free(comp_ctx->input, MAX_INPUT_BUFFER_SIZE);
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return -ENOMEM;
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}
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static void zip_ctx_exit(struct zip_kernel_ctx *zip_ctx)
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{
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struct zip_operation *comp_ctx = &zip_ctx->zip_comp;
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struct zip_operation *dec_ctx = &zip_ctx->zip_decomp;
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zip_data_buf_free(comp_ctx->input, MAX_INPUT_BUFFER_SIZE);
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zip_data_buf_free(comp_ctx->output, MAX_OUTPUT_BUFFER_SIZE);
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zip_data_buf_free(dec_ctx->input, MAX_INPUT_BUFFER_SIZE);
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zip_data_buf_free(dec_ctx->output, MAX_OUTPUT_BUFFER_SIZE);
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}
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static int zip_compress(const u8 *src, unsigned int slen,
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u8 *dst, unsigned int *dlen,
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struct zip_kernel_ctx *zip_ctx)
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{
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struct zip_operation *zip_ops = NULL;
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struct zip_state *zip_state;
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struct zip_device *zip = NULL;
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int ret;
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if (!zip_ctx || !src || !dst || !dlen)
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return -ENOMEM;
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zip = zip_get_device(zip_get_node_id());
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if (!zip)
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return -ENODEV;
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zip_state = kzalloc(sizeof(*zip_state), GFP_ATOMIC);
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if (!zip_state)
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return -ENOMEM;
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zip_ops = &zip_ctx->zip_comp;
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zip_ops->input_len = slen;
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zip_ops->output_len = *dlen;
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memcpy(zip_ops->input, src, slen);
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ret = zip_deflate(zip_ops, zip_state, zip);
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if (!ret) {
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*dlen = zip_ops->output_len;
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memcpy(dst, zip_ops->output, *dlen);
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}
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kfree(zip_state);
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return ret;
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}
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static int zip_decompress(const u8 *src, unsigned int slen,
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u8 *dst, unsigned int *dlen,
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struct zip_kernel_ctx *zip_ctx)
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{
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struct zip_operation *zip_ops = NULL;
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struct zip_state *zip_state;
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struct zip_device *zip = NULL;
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int ret;
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if (!zip_ctx || !src || !dst || !dlen)
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return -ENOMEM;
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zip = zip_get_device(zip_get_node_id());
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if (!zip)
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return -ENODEV;
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zip_state = kzalloc(sizeof(*zip_state), GFP_ATOMIC);
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if (!zip_state)
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return -ENOMEM;
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zip_ops = &zip_ctx->zip_decomp;
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memcpy(zip_ops->input, src, slen);
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/* Work around for a bug in zlib which needs an extra bytes sometimes */
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if (zip_ops->ccode != 3) /* Not LZS Encoding */
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zip_ops->input[slen++] = 0;
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zip_ops->input_len = slen;
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zip_ops->output_len = *dlen;
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ret = zip_inflate(zip_ops, zip_state, zip);
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if (!ret) {
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*dlen = zip_ops->output_len;
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memcpy(dst, zip_ops->output, *dlen);
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}
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kfree(zip_state);
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return ret;
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}
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/* Legacy Compress framework start */
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int zip_alloc_comp_ctx_deflate(struct crypto_tfm *tfm)
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{
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struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm);
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return zip_ctx_init(zip_ctx, 0);
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}
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int zip_alloc_comp_ctx_lzs(struct crypto_tfm *tfm)
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{
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struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm);
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return zip_ctx_init(zip_ctx, 1);
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}
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void zip_free_comp_ctx(struct crypto_tfm *tfm)
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{
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struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm);
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zip_ctx_exit(zip_ctx);
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}
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int zip_comp_compress(struct crypto_tfm *tfm,
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const u8 *src, unsigned int slen,
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u8 *dst, unsigned int *dlen)
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{
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struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm);
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return zip_compress(src, slen, dst, dlen, zip_ctx);
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}
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int zip_comp_decompress(struct crypto_tfm *tfm,
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const u8 *src, unsigned int slen,
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u8 *dst, unsigned int *dlen)
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{
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struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm);
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return zip_decompress(src, slen, dst, dlen, zip_ctx);
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} /* Legacy compress framework end */
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/* SCOMP framework start */
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void *zip_alloc_scomp_ctx_deflate(struct crypto_scomp *tfm)
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{
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int ret;
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struct zip_kernel_ctx *zip_ctx;
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zip_ctx = kzalloc(sizeof(*zip_ctx), GFP_KERNEL);
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if (!zip_ctx)
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return ERR_PTR(-ENOMEM);
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ret = zip_ctx_init(zip_ctx, 0);
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if (ret) {
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kfree_sensitive(zip_ctx);
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return ERR_PTR(ret);
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}
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return zip_ctx;
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}
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void *zip_alloc_scomp_ctx_lzs(struct crypto_scomp *tfm)
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{
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int ret;
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struct zip_kernel_ctx *zip_ctx;
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zip_ctx = kzalloc(sizeof(*zip_ctx), GFP_KERNEL);
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if (!zip_ctx)
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return ERR_PTR(-ENOMEM);
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ret = zip_ctx_init(zip_ctx, 1);
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if (ret) {
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kfree_sensitive(zip_ctx);
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return ERR_PTR(ret);
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}
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return zip_ctx;
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}
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void zip_free_scomp_ctx(struct crypto_scomp *tfm, void *ctx)
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{
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struct zip_kernel_ctx *zip_ctx = ctx;
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zip_ctx_exit(zip_ctx);
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kfree_sensitive(zip_ctx);
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}
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int zip_scomp_compress(struct crypto_scomp *tfm,
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const u8 *src, unsigned int slen,
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u8 *dst, unsigned int *dlen, void *ctx)
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{
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struct zip_kernel_ctx *zip_ctx = ctx;
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return zip_compress(src, slen, dst, dlen, zip_ctx);
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}
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int zip_scomp_decompress(struct crypto_scomp *tfm,
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const u8 *src, unsigned int slen,
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u8 *dst, unsigned int *dlen, void *ctx)
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{
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struct zip_kernel_ctx *zip_ctx = ctx;
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return zip_decompress(src, slen, dst, dlen, zip_ctx);
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} /* SCOMP framework end */
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