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authorcvs2svn <admin@example.com>2002-09-26 11:41:23 +0000
committercvs2svn <admin@example.com>2002-09-26 11:41:23 +0000
commit3b5c5bfc7cdfc65c13061b8267f92cfc3c3d9f62 (patch)
tree65b4d250c712e6725dca113b306ae73f896475e1 /src/lib/libcrypto/comp/c_zlib.c
parentaf61e3f7dbe1fd8b363339d8ec5d6aec5f400ce3 (diff)
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Diffstat (limited to 'src/lib/libcrypto/comp/c_zlib.c')
-rw-r--r--src/lib/libcrypto/comp/c_zlib.c260
1 files changed, 0 insertions, 260 deletions
diff --git a/src/lib/libcrypto/comp/c_zlib.c b/src/lib/libcrypto/comp/c_zlib.c
deleted file mode 100644
index cd2f8a491b..0000000000
--- a/src/lib/libcrypto/comp/c_zlib.c
+++ /dev/null
@@ -1,260 +0,0 @@
1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4#include <openssl/objects.h>
5#include <openssl/comp.h>
6
7COMP_METHOD *COMP_zlib(void );
8
9static COMP_METHOD zlib_method_nozlib={
10 NID_undef,
11 "(undef)",
12 NULL,
13 NULL,
14 NULL,
15 NULL,
16 NULL,
17 NULL,
18 };
19
20#ifndef ZLIB
21#undef ZLIB_SHARED
22#else
23
24#include <zlib.h>
25
26static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
27 unsigned int olen, unsigned char *in, unsigned int ilen);
28static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
29 unsigned int olen, unsigned char *in, unsigned int ilen);
30
31static int zz_uncompress(Bytef *dest, uLongf *destLen, const Bytef *source,
32 uLong sourceLen);
33
34static COMP_METHOD zlib_method={
35 NID_zlib_compression,
36 LN_zlib_compression,
37 NULL,
38 NULL,
39 zlib_compress_block,
40 zlib_expand_block,
41 NULL,
42 NULL,
43 };
44
45/*
46 * When OpenSSL is built on Windows, we do not want to require that
47 * the ZLIB.DLL be available in order for the OpenSSL DLLs to
48 * work. Therefore, all ZLIB routines are loaded at run time
49 * and we do not link to a .LIB file.
50 */
51#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
52# include <windows.h>
53
54# define Z_CALLCONV _stdcall
55# define ZLIB_SHARED
56#else
57# define Z_CALLCONV
58#endif /* !(OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32) */
59
60#ifdef ZLIB_SHARED
61#include <openssl/dso.h>
62
63/* Prototypes for built in stubs */
64static int stub_compress(Bytef *dest,uLongf *destLen,
65 const Bytef *source, uLong sourceLen);
66static int stub_inflateEnd(z_streamp strm);
67static int stub_inflate(z_streamp strm, int flush);
68static int stub_inflateInit_(z_streamp strm, const char * version,
69 int stream_size);
70
71/* Function pointers */
72typedef int (Z_CALLCONV *compress_ft)(Bytef *dest,uLongf *destLen,
73 const Bytef *source, uLong sourceLen);
74typedef int (Z_CALLCONV *inflateEnd_ft)(z_streamp strm);
75typedef int (Z_CALLCONV *inflate_ft)(z_streamp strm, int flush);
76typedef int (Z_CALLCONV *inflateInit__ft)(z_streamp strm,
77 const char * version, int stream_size);
78static compress_ft p_compress=NULL;
79static inflateEnd_ft p_inflateEnd=NULL;
80static inflate_ft p_inflate=NULL;
81static inflateInit__ft p_inflateInit_=NULL;
82
83static int zlib_loaded = 0; /* only attempt to init func pts once */
84static DSO *zlib_dso = NULL;
85
86#define compress stub_compress
87#define inflateEnd stub_inflateEnd
88#define inflate stub_inflate
89#define inflateInit_ stub_inflateInit_
90#endif /* ZLIB_SHARED */
91
92static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
93 unsigned int olen, unsigned char *in, unsigned int ilen)
94 {
95 unsigned long l;
96 int i;
97 int clear=1;
98
99 if (ilen > 128)
100 {
101 out[0]=1;
102 l=olen-1;
103 i=compress(&(out[1]),&l,in,(unsigned long)ilen);
104 if (i != Z_OK)
105 return(-1);
106 if (ilen > l)
107 {
108 clear=0;
109 l++;
110 }
111 }
112 if (clear)
113 {
114 out[0]=0;
115 memcpy(&(out[1]),in,ilen);
116 l=ilen+1;
117 }
118#ifdef DEBUG_ZLIB
119 fprintf(stderr,"compress(%4d)->%4d %s\n",
120 ilen,(int)l,(clear)?"clear":"zlib");
121#endif
122 return((int)l);
123 }
124
125static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
126 unsigned int olen, unsigned char *in, unsigned int ilen)
127 {
128 unsigned long l;
129 int i;
130
131 if (in[0])
132 {
133 l=olen;
134 i=zz_uncompress(out,&l,&(in[1]),(unsigned long)ilen-1);
135 if (i != Z_OK)
136 return(-1);
137 }
138 else
139 {
140 memcpy(out,&(in[1]),ilen-1);
141 l=ilen-1;
142 }
143#ifdef DEBUG_ZLIB
144 fprintf(stderr,"expand (%4d)->%4d %s\n",
145 ilen,(int)l,in[0]?"zlib":"clear");
146#endif
147 return((int)l);
148 }
149
150static int zz_uncompress (Bytef *dest, uLongf *destLen, const Bytef *source,
151 uLong sourceLen)
152{
153 z_stream stream;
154 int err;
155
156 stream.next_in = (Bytef*)source;
157 stream.avail_in = (uInt)sourceLen;
158 /* Check for source > 64K on 16-bit machine: */
159 if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
160
161 stream.next_out = dest;
162 stream.avail_out = (uInt)*destLen;
163 if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
164
165 stream.zalloc = (alloc_func)0;
166 stream.zfree = (free_func)0;
167
168 err = inflateInit(&stream);
169 if (err != Z_OK) return err;
170
171 err = inflate(&stream, Z_FINISH);
172 if (err != Z_STREAM_END) {
173 inflateEnd(&stream);
174 return err;
175 }
176 *destLen = stream.total_out;
177
178 err = inflateEnd(&stream);
179 return err;
180}
181
182#endif
183
184COMP_METHOD *COMP_zlib(void)
185 {
186 COMP_METHOD *meth = &zlib_method_nozlib;
187
188#ifdef ZLIB_SHARED
189 if (!zlib_loaded)
190 {
191#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
192 zlib_dso = DSO_load(NULL, "ZLIB", NULL, 0);
193#else
194 zlib_dso = DSO_load(NULL, "z", NULL, 0);
195#endif
196 if (zlib_dso != NULL)
197 {
198 p_compress
199 = (compress_ft) DSO_bind_func(zlib_dso,
200 "compress");
201 p_inflateEnd
202 = (inflateEnd_ft) DSO_bind_func(zlib_dso,
203 "inflateEnd");
204 p_inflate
205 = (inflate_ft) DSO_bind_func(zlib_dso,
206 "inflate");
207 p_inflateInit_
208 = (inflateInit__ft) DSO_bind_func(zlib_dso,
209 "inflateInit_");
210 zlib_loaded++;
211 meth = &zlib_method;
212 }
213 }
214
215#elif defined(ZLIB)
216 meth = &zlib_method;
217#endif
218
219 return(meth);
220 }
221
222#ifdef ZLIB_SHARED
223/* Stubs for each function to be dynamicly loaded */
224static int
225stub_compress(Bytef *dest,uLongf *destLen,const Bytef *source, uLong sourceLen)
226 {
227 if (p_compress)
228 return(p_compress(dest,destLen,source,sourceLen));
229 else
230 return(Z_MEM_ERROR);
231 }
232
233static int
234stub_inflateEnd(z_streamp strm)
235 {
236 if ( p_inflateEnd )
237 return(p_inflateEnd(strm));
238 else
239 return(Z_MEM_ERROR);
240 }
241
242static int
243stub_inflate(z_streamp strm, int flush)
244 {
245 if ( p_inflate )
246 return(p_inflate(strm,flush));
247 else
248 return(Z_MEM_ERROR);
249 }
250
251static int
252stub_inflateInit_(z_streamp strm, const char * version, int stream_size)
253 {
254 if ( p_inflateInit_ )
255 return(p_inflateInit_(strm,version,stream_size));
256 else
257 return(Z_MEM_ERROR);
258 }
259
260#endif /* ZLIB_SHARED */
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