d 0773d / CyaSSL

Fork of CyaSSL for my specific settings

Dependents:   CyaSSL_Example

Fork of CyaSSL by wolf SSL

ctaocrypt/src/compress.c@0:1239e9b70ca2, 2014-07-12 (annotated)

Committer:
wolfSSL
Date:
Sat Jul 12 07:18:23 2014 +0000
Revision:
0:1239e9b70ca2
CyaSSL 3.0.0;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 0:1239e9b70ca2 1 /* compress.c
wolfSSL 0:1239e9b70ca2 2 *
wolfSSL 0:1239e9b70ca2 3 * Copyright (C) 2006-2014 wolfSSL Inc.
wolfSSL 0:1239e9b70ca2 4 *
wolfSSL 0:1239e9b70ca2 5 * This file is part of CyaSSL.
wolfSSL 0:1239e9b70ca2 6 *
wolfSSL 0:1239e9b70ca2 7 * CyaSSL is free software; you can redistribute it and/or modify
wolfSSL 0:1239e9b70ca2 8 * it under the terms of the GNU General Public License as published by
wolfSSL 0:1239e9b70ca2 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 0:1239e9b70ca2 10 * (at your option) any later version.
wolfSSL 0:1239e9b70ca2 11 *
wolfSSL 0:1239e9b70ca2 12 * CyaSSL is distributed in the hope that it will be useful,
wolfSSL 0:1239e9b70ca2 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 0:1239e9b70ca2 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 0:1239e9b70ca2 15 * GNU General Public License for more details.
wolfSSL 0:1239e9b70ca2 16 *
wolfSSL 0:1239e9b70ca2 17 * You should have received a copy of the GNU General Public License
wolfSSL 0:1239e9b70ca2 18 * along with this program; if not, write to the Free Software
wolfSSL 0:1239e9b70ca2 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
wolfSSL 0:1239e9b70ca2 20 */
wolfSSL 0:1239e9b70ca2 21
wolfSSL 0:1239e9b70ca2 22
wolfSSL 0:1239e9b70ca2 23 #ifdef HAVE_CONFIG_H
wolfSSL 0:1239e9b70ca2 24 #include <config.h>
wolfSSL 0:1239e9b70ca2 25 #endif
wolfSSL 0:1239e9b70ca2 26
wolfSSL 0:1239e9b70ca2 27 #include <cyassl/ctaocrypt/settings.h>
wolfSSL 0:1239e9b70ca2 28
wolfSSL 0:1239e9b70ca2 29 #ifdef HAVE_LIBZ
wolfSSL 0:1239e9b70ca2 30
wolfSSL 0:1239e9b70ca2 31
wolfSSL 0:1239e9b70ca2 32 #include <cyassl/ctaocrypt/compress.h>
wolfSSL 0:1239e9b70ca2 33 #include <cyassl/ctaocrypt/error-crypt.h>
wolfSSL 0:1239e9b70ca2 34 #include <cyassl/ctaocrypt/logging.h>
wolfSSL 0:1239e9b70ca2 35 #ifdef NO_INLINE
wolfSSL 0:1239e9b70ca2 36 #include <cyassl/ctaocrypt/misc.h>
wolfSSL 0:1239e9b70ca2 37 #else
wolfSSL 0:1239e9b70ca2 38 #include <ctaocrypt/src/misc.c>
wolfSSL 0:1239e9b70ca2 39 #endif
wolfSSL 0:1239e9b70ca2 40
wolfSSL 0:1239e9b70ca2 41 #include <zlib.h>
wolfSSL 0:1239e9b70ca2 42
wolfSSL 0:1239e9b70ca2 43
wolfSSL 0:1239e9b70ca2 44 /* alloc user allocs to work with zlib */
wolfSSL 0:1239e9b70ca2 45 static void* myAlloc(void* opaque, unsigned int item, unsigned int size)
wolfSSL 0:1239e9b70ca2 46 {
wolfSSL 0:1239e9b70ca2 47 (void)opaque;
wolfSSL 0:1239e9b70ca2 48 return XMALLOC(item * size, opaque, DYNAMIC_TYPE_LIBZ);
wolfSSL 0:1239e9b70ca2 49 }
wolfSSL 0:1239e9b70ca2 50
wolfSSL 0:1239e9b70ca2 51
wolfSSL 0:1239e9b70ca2 52 static void myFree(void* opaque, void* memory)
wolfSSL 0:1239e9b70ca2 53 {
wolfSSL 0:1239e9b70ca2 54 (void)opaque;
wolfSSL 0:1239e9b70ca2 55 XFREE(memory, opaque, DYNAMIC_TYPE_LIBZ);
wolfSSL 0:1239e9b70ca2 56 }
wolfSSL 0:1239e9b70ca2 57
wolfSSL 0:1239e9b70ca2 58
wolfSSL 0:1239e9b70ca2 59 #ifdef HAVE_MCAPI
wolfSSL 0:1239e9b70ca2 60 #define DEFLATE_DEFAULT_WINDOWBITS 11
wolfSSL 0:1239e9b70ca2 61 #define DEFLATE_DEFAULT_MEMLEVEL 1
wolfSSL 0:1239e9b70ca2 62 #else
wolfSSL 0:1239e9b70ca2 63 #define DEFLATE_DEFAULT_WINDOWBITS 15
wolfSSL 0:1239e9b70ca2 64 #define DEFLATE_DEFAULT_MEMLEVEL 8
wolfSSL 0:1239e9b70ca2 65 #endif
wolfSSL 0:1239e9b70ca2 66
wolfSSL 0:1239e9b70ca2 67
wolfSSL 0:1239e9b70ca2 68 int Compress(byte* out, word32 outSz, const byte* in, word32 inSz, word32 flags)
wolfSSL 0:1239e9b70ca2 69 /*
wolfSSL 0:1239e9b70ca2 70 * out - pointer to destination buffer
wolfSSL 0:1239e9b70ca2 71 * outSz - size of destination buffer
wolfSSL 0:1239e9b70ca2 72 * in - pointer to source buffer to compress
wolfSSL 0:1239e9b70ca2 73 * inSz - size of source to compress
wolfSSL 0:1239e9b70ca2 74 * flags - flags to control how compress operates
wolfSSL 0:1239e9b70ca2 75 *
wolfSSL 0:1239e9b70ca2 76 * return:
wolfSSL 0:1239e9b70ca2 77 * negative - error code
wolfSSL 0:1239e9b70ca2 78 * positive - bytes stored in out buffer
wolfSSL 0:1239e9b70ca2 79 *
wolfSSL 0:1239e9b70ca2 80 * Note, the output buffer still needs to be larger than the input buffer.
wolfSSL 0:1239e9b70ca2 81 * The right chunk of data won't compress at all, and the lookup table will
wolfSSL 0:1239e9b70ca2 82 * add to the size of the output. The libz code says the compressed
wolfSSL 0:1239e9b70ca2 83 * buffer should be srcSz + 0.1% + 12.
wolfSSL 0:1239e9b70ca2 84 */
wolfSSL 0:1239e9b70ca2 85 {
wolfSSL 0:1239e9b70ca2 86 z_stream stream;
wolfSSL 0:1239e9b70ca2 87 int result = 0;
wolfSSL 0:1239e9b70ca2 88
wolfSSL 0:1239e9b70ca2 89 stream.next_in = (Bytef*)in;
wolfSSL 0:1239e9b70ca2 90 stream.avail_in = (uInt)inSz;
wolfSSL 0:1239e9b70ca2 91 #ifdef MAXSEG_64K
wolfSSL 0:1239e9b70ca2 92 /* Check for source > 64K on 16-bit machine: */
wolfSSL 0:1239e9b70ca2 93 if ((uLong)stream.avail_in != inSz) return COMPRESS_INIT_E;
wolfSSL 0:1239e9b70ca2 94 #endif
wolfSSL 0:1239e9b70ca2 95 stream.next_out = out;
wolfSSL 0:1239e9b70ca2 96 stream.avail_out = (uInt)outSz;
wolfSSL 0:1239e9b70ca2 97 if ((uLong)stream.avail_out != outSz) return COMPRESS_INIT_E;
wolfSSL 0:1239e9b70ca2 98
wolfSSL 0:1239e9b70ca2 99 stream.zalloc = (alloc_func)myAlloc;
wolfSSL 0:1239e9b70ca2 100 stream.zfree = (free_func)myFree;
wolfSSL 0:1239e9b70ca2 101 stream.opaque = (voidpf)0;
wolfSSL 0:1239e9b70ca2 102
wolfSSL 0:1239e9b70ca2 103 if (deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED,
wolfSSL 0:1239e9b70ca2 104 DEFLATE_DEFAULT_WINDOWBITS, DEFLATE_DEFAULT_MEMLEVEL,
wolfSSL 0:1239e9b70ca2 105 flags ? Z_FIXED : Z_DEFAULT_STRATEGY) != Z_OK)
wolfSSL 0:1239e9b70ca2 106 return COMPRESS_INIT_E;
wolfSSL 0:1239e9b70ca2 107
wolfSSL 0:1239e9b70ca2 108 if (deflate(&stream, Z_FINISH) != Z_STREAM_END) {
wolfSSL 0:1239e9b70ca2 109 deflateEnd(&stream);
wolfSSL 0:1239e9b70ca2 110 return COMPRESS_E;
wolfSSL 0:1239e9b70ca2 111 }
wolfSSL 0:1239e9b70ca2 112
wolfSSL 0:1239e9b70ca2 113 result = (int)stream.total_out;
wolfSSL 0:1239e9b70ca2 114
wolfSSL 0:1239e9b70ca2 115 if (deflateEnd(&stream) != Z_OK)
wolfSSL 0:1239e9b70ca2 116 result = COMPRESS_E;
wolfSSL 0:1239e9b70ca2 117
wolfSSL 0:1239e9b70ca2 118 return result;
wolfSSL 0:1239e9b70ca2 119 }
wolfSSL 0:1239e9b70ca2 120
wolfSSL 0:1239e9b70ca2 121
wolfSSL 0:1239e9b70ca2 122 int DeCompress(byte* out, word32 outSz, const byte* in, word32 inSz)
wolfSSL 0:1239e9b70ca2 123 /*
wolfSSL 0:1239e9b70ca2 124 * out - pointer to destination buffer
wolfSSL 0:1239e9b70ca2 125 * outSz - size of destination buffer
wolfSSL 0:1239e9b70ca2 126 * in - pointer to source buffer to compress
wolfSSL 0:1239e9b70ca2 127 * inSz - size of source to compress
wolfSSL 0:1239e9b70ca2 128 * flags - flags to control how compress operates
wolfSSL 0:1239e9b70ca2 129 *
wolfSSL 0:1239e9b70ca2 130 * return:
wolfSSL 0:1239e9b70ca2 131 * negative - error code
wolfSSL 0:1239e9b70ca2 132 * positive - bytes stored in out buffer
wolfSSL 0:1239e9b70ca2 133 */
wolfSSL 0:1239e9b70ca2 134 {
wolfSSL 0:1239e9b70ca2 135 z_stream stream;
wolfSSL 0:1239e9b70ca2 136 int result = 0;
wolfSSL 0:1239e9b70ca2 137
wolfSSL 0:1239e9b70ca2 138 stream.next_in = (Bytef*)in;
wolfSSL 0:1239e9b70ca2 139 stream.avail_in = (uInt)inSz;
wolfSSL 0:1239e9b70ca2 140 /* Check for source > 64K on 16-bit machine: */
wolfSSL 0:1239e9b70ca2 141 if ((uLong)stream.avail_in != inSz) return DECOMPRESS_INIT_E;
wolfSSL 0:1239e9b70ca2 142
wolfSSL 0:1239e9b70ca2 143 stream.next_out = out;
wolfSSL 0:1239e9b70ca2 144 stream.avail_out = (uInt)outSz;
wolfSSL 0:1239e9b70ca2 145 if ((uLong)stream.avail_out != outSz) return DECOMPRESS_INIT_E;
wolfSSL 0:1239e9b70ca2 146
wolfSSL 0:1239e9b70ca2 147 stream.zalloc = (alloc_func)myAlloc;
wolfSSL 0:1239e9b70ca2 148 stream.zfree = (free_func)myFree;
wolfSSL 0:1239e9b70ca2 149 stream.opaque = (voidpf)0;
wolfSSL 0:1239e9b70ca2 150
wolfSSL 0:1239e9b70ca2 151 if (inflateInit2(&stream, DEFLATE_DEFAULT_WINDOWBITS) != Z_OK)
wolfSSL 0:1239e9b70ca2 152 return DECOMPRESS_INIT_E;
wolfSSL 0:1239e9b70ca2 153
wolfSSL 0:1239e9b70ca2 154 if (inflate(&stream, Z_FINISH) != Z_STREAM_END) {
wolfSSL 0:1239e9b70ca2 155 inflateEnd(&stream);
wolfSSL 0:1239e9b70ca2 156 return DECOMPRESS_E;
wolfSSL 0:1239e9b70ca2 157 }
wolfSSL 0:1239e9b70ca2 158
wolfSSL 0:1239e9b70ca2 159 result = (int)stream.total_out;
wolfSSL 0:1239e9b70ca2 160
wolfSSL 0:1239e9b70ca2 161 if (inflateEnd(&stream) != Z_OK)
wolfSSL 0:1239e9b70ca2 162 result = DECOMPRESS_E;
wolfSSL 0:1239e9b70ca2 163
wolfSSL 0:1239e9b70ca2 164 return result;
wolfSSL 0:1239e9b70ca2 165 }
wolfSSL 0:1239e9b70ca2 166
wolfSSL 0:1239e9b70ca2 167
wolfSSL 0:1239e9b70ca2 168 #endif /* HAVE_LIBZ */
wolfSSL 0:1239e9b70ca2 169
wolfSSL 0:1239e9b70ca2 170