1 /***********************license start************************************ 2 * Copyright (c) 2003-2017 Cavium, Inc. 3 * All rights reserved. 4 * 5 * License: one of 'Cavium License' or 'GNU General Public License Version 2' 6 * 7 * This file is provided under the terms of the Cavium License (see below) 8 * or under the terms of GNU General Public License, Version 2, as 9 * published by the Free Software Foundation. When using or redistributing 10 * this file, you may do so under either license. 11 * 12 * Cavium License: Redistribution and use in source and binary forms, with 13 * or without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * * Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 19 * * Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials provided 22 * with the distribution. 23 * 24 * * Neither the name of Cavium Inc. nor the names of its contributors may be 25 * used to endorse or promote products derived from this software without 26 * specific prior written permission. 27 * 28 * This Software, including technical data, may be subject to U.S. export 29 * control laws, including the U.S. Export Administration Act and its 30 * associated regulations, and may be subject to export or import 31 * regulations in other countries. 32 * 33 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" 34 * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS 35 * OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH 36 * RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY 37 * REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT 38 * DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) 39 * WARRANTIES OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A 40 * PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET 41 * ENJOYMENT, QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE 42 * ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES 43 * WITH YOU. 44 ***********************license end**************************************/ 45 46 #include "zip_crypto.h" 47 48 static void zip_static_init_zip_ops(struct zip_operation *zip_ops, 49 int lzs_flag) 50 { 51 zip_ops->flush = ZIP_FLUSH_FINISH; 52 53 /* equivalent to level 6 of opensource zlib */ 54 zip_ops->speed = 1; 55 56 if (!lzs_flag) { 57 zip_ops->ccode = 0; /* Auto Huffman */ 58 zip_ops->lzs_flag = 0; 59 zip_ops->format = ZLIB_FORMAT; 60 } else { 61 zip_ops->ccode = 3; /* LZS Encoding */ 62 zip_ops->lzs_flag = 1; 63 zip_ops->format = LZS_FORMAT; 64 } 65 zip_ops->begin_file = 1; 66 zip_ops->history_len = 0; 67 zip_ops->end_file = 1; 68 zip_ops->compcode = 0; 69 zip_ops->csum = 1; /* Adler checksum desired */ 70 } 71 72 int zip_ctx_init(struct zip_kernel_ctx *zip_ctx, int lzs_flag) 73 { 74 struct zip_operation *comp_ctx = &zip_ctx->zip_comp; 75 struct zip_operation *decomp_ctx = &zip_ctx->zip_decomp; 76 77 zip_static_init_zip_ops(comp_ctx, lzs_flag); 78 zip_static_init_zip_ops(decomp_ctx, lzs_flag); 79 80 comp_ctx->input = zip_data_buf_alloc(MAX_INPUT_BUFFER_SIZE); 81 if (!comp_ctx->input) 82 return -ENOMEM; 83 84 comp_ctx->output = zip_data_buf_alloc(MAX_OUTPUT_BUFFER_SIZE); 85 if (!comp_ctx->output) 86 goto err_comp_input; 87 88 decomp_ctx->input = zip_data_buf_alloc(MAX_INPUT_BUFFER_SIZE); 89 if (!decomp_ctx->input) 90 goto err_comp_output; 91 92 decomp_ctx->output = zip_data_buf_alloc(MAX_OUTPUT_BUFFER_SIZE); 93 if (!decomp_ctx->output) 94 goto err_decomp_input; 95 96 return 0; 97 98 err_decomp_input: 99 zip_data_buf_free(decomp_ctx->input, MAX_INPUT_BUFFER_SIZE); 100 101 err_comp_output: 102 zip_data_buf_free(comp_ctx->output, MAX_OUTPUT_BUFFER_SIZE); 103 104 err_comp_input: 105 zip_data_buf_free(comp_ctx->input, MAX_INPUT_BUFFER_SIZE); 106 107 return -ENOMEM; 108 } 109 110 void zip_ctx_exit(struct zip_kernel_ctx *zip_ctx) 111 { 112 struct zip_operation *comp_ctx = &zip_ctx->zip_comp; 113 struct zip_operation *dec_ctx = &zip_ctx->zip_decomp; 114 115 zip_data_buf_free(comp_ctx->input, MAX_INPUT_BUFFER_SIZE); 116 zip_data_buf_free(comp_ctx->output, MAX_OUTPUT_BUFFER_SIZE); 117 118 zip_data_buf_free(dec_ctx->input, MAX_INPUT_BUFFER_SIZE); 119 zip_data_buf_free(dec_ctx->output, MAX_OUTPUT_BUFFER_SIZE); 120 } 121 122 int zip_compress(const u8 *src, unsigned int slen, 123 u8 *dst, unsigned int *dlen, 124 struct zip_kernel_ctx *zip_ctx) 125 { 126 struct zip_operation *zip_ops = NULL; 127 struct zip_state zip_state; 128 struct zip_device *zip = NULL; 129 int ret; 130 131 if (!zip_ctx || !src || !dst || !dlen) 132 return -ENOMEM; 133 134 zip = zip_get_device(zip_get_node_id()); 135 if (!zip) 136 return -ENODEV; 137 138 memset(&zip_state, 0, sizeof(struct zip_state)); 139 zip_ops = &zip_ctx->zip_comp; 140 141 zip_ops->input_len = slen; 142 zip_ops->output_len = *dlen; 143 memcpy(zip_ops->input, src, slen); 144 145 ret = zip_deflate(zip_ops, &zip_state, zip); 146 147 if (!ret) { 148 *dlen = zip_ops->output_len; 149 memcpy(dst, zip_ops->output, *dlen); 150 } 151 152 return ret; 153 } 154 155 int zip_decompress(const u8 *src, unsigned int slen, 156 u8 *dst, unsigned int *dlen, 157 struct zip_kernel_ctx *zip_ctx) 158 { 159 struct zip_operation *zip_ops = NULL; 160 struct zip_state zip_state; 161 struct zip_device *zip = NULL; 162 int ret; 163 164 if (!zip_ctx || !src || !dst || !dlen) 165 return -ENOMEM; 166 167 zip = zip_get_device(zip_get_node_id()); 168 if (!zip) 169 return -ENODEV; 170 171 memset(&zip_state, 0, sizeof(struct zip_state)); 172 zip_ops = &zip_ctx->zip_decomp; 173 memcpy(zip_ops->input, src, slen); 174 175 /* Work around for a bug in zlib which needs an extra bytes sometimes */ 176 if (zip_ops->ccode != 3) /* Not LZS Encoding */ 177 zip_ops->input[slen++] = 0; 178 179 zip_ops->input_len = slen; 180 zip_ops->output_len = *dlen; 181 182 ret = zip_inflate(zip_ops, &zip_state, zip); 183 184 if (!ret) { 185 *dlen = zip_ops->output_len; 186 memcpy(dst, zip_ops->output, *dlen); 187 } 188 189 return ret; 190 } 191 192 /* Legacy Compress framework start */ 193 int zip_alloc_comp_ctx_deflate(struct crypto_tfm *tfm) 194 { 195 int ret; 196 struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm); 197 198 ret = zip_ctx_init(zip_ctx, 0); 199 200 return ret; 201 } 202 203 int zip_alloc_comp_ctx_lzs(struct crypto_tfm *tfm) 204 { 205 int ret; 206 struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm); 207 208 ret = zip_ctx_init(zip_ctx, 1); 209 210 return ret; 211 } 212 213 void zip_free_comp_ctx(struct crypto_tfm *tfm) 214 { 215 struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm); 216 217 zip_ctx_exit(zip_ctx); 218 } 219 220 int zip_comp_compress(struct crypto_tfm *tfm, 221 const u8 *src, unsigned int slen, 222 u8 *dst, unsigned int *dlen) 223 { 224 int ret; 225 struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm); 226 227 ret = zip_compress(src, slen, dst, dlen, zip_ctx); 228 229 return ret; 230 } 231 232 int zip_comp_decompress(struct crypto_tfm *tfm, 233 const u8 *src, unsigned int slen, 234 u8 *dst, unsigned int *dlen) 235 { 236 int ret; 237 struct zip_kernel_ctx *zip_ctx = crypto_tfm_ctx(tfm); 238 239 ret = zip_decompress(src, slen, dst, dlen, zip_ctx); 240 241 return ret; 242 } /* Legacy compress framework end */ 243 244 /* SCOMP framework start */ 245 void *zip_alloc_scomp_ctx_deflate(struct crypto_scomp *tfm) 246 { 247 int ret; 248 struct zip_kernel_ctx *zip_ctx; 249 250 zip_ctx = kzalloc(sizeof(*zip_ctx), GFP_KERNEL); 251 if (!zip_ctx) 252 return ERR_PTR(-ENOMEM); 253 254 ret = zip_ctx_init(zip_ctx, 0); 255 256 if (ret) { 257 kzfree(zip_ctx); 258 return ERR_PTR(ret); 259 } 260 261 return zip_ctx; 262 } 263 264 void *zip_alloc_scomp_ctx_lzs(struct crypto_scomp *tfm) 265 { 266 int ret; 267 struct zip_kernel_ctx *zip_ctx; 268 269 zip_ctx = kzalloc(sizeof(*zip_ctx), GFP_KERNEL); 270 if (!zip_ctx) 271 return ERR_PTR(-ENOMEM); 272 273 ret = zip_ctx_init(zip_ctx, 1); 274 275 if (ret) { 276 kzfree(zip_ctx); 277 return ERR_PTR(ret); 278 } 279 280 return zip_ctx; 281 } 282 283 void zip_free_scomp_ctx(struct crypto_scomp *tfm, void *ctx) 284 { 285 struct zip_kernel_ctx *zip_ctx = ctx; 286 287 zip_ctx_exit(zip_ctx); 288 kzfree(zip_ctx); 289 } 290 291 int zip_scomp_compress(struct crypto_scomp *tfm, 292 const u8 *src, unsigned int slen, 293 u8 *dst, unsigned int *dlen, void *ctx) 294 { 295 int ret; 296 struct zip_kernel_ctx *zip_ctx = ctx; 297 298 ret = zip_compress(src, slen, dst, dlen, zip_ctx); 299 300 return ret; 301 } 302 303 int zip_scomp_decompress(struct crypto_scomp *tfm, 304 const u8 *src, unsigned int slen, 305 u8 *dst, unsigned int *dlen, void *ctx) 306 { 307 int ret; 308 struct zip_kernel_ctx *zip_ctx = ctx; 309 310 ret = zip_decompress(src, slen, dst, dlen, zip_ctx); 311 312 return ret; 313 } /* SCOMP framework end */ 314