1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation. Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 // This file is available under and governed by the GNU General Public
26 // License version 2 only, as published by the Free Software Foundation.
27 // However, the following notice accompanied the original version of this
28 // file:
29 //
30 //---------------------------------------------------------------------------------
31 //
32 // Little Color Management System
33 // Copyright (c) 1998-2020 Marti Maria Saguer
34 //
35 // Permission is hereby granted, free of charge, to any person obtaining
36 // a copy of this software and associated documentation files (the "Software"),
37 // to deal in the Software without restriction, including without limitation
38 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
39 // and/or sell copies of the Software, and to permit persons to whom the Software
40 // is furnished to do so, subject to the following conditions:
41 //
42 // The above copyright notice and this permission notice shall be included in
43 // all copies or substantial portions of the Software.
44 //
45 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
46 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
47 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
48 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
49 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
50 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
51 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
52 //
53 //---------------------------------------------------------------------------------
54
55
56 #include "lcms2_internal.h"
57
58 #ifdef CMS_USE_BIG_ENDIAN
59
60 static
byteReverse(cmsUInt8Number * buf,cmsUInt32Number longs)61 void byteReverse(cmsUInt8Number * buf, cmsUInt32Number longs)
62 {
63 do {
64
65 cmsUInt32Number t = _cmsAdjustEndianess32(*(cmsUInt32Number *) buf);
66 *(cmsUInt32Number *) buf = t;
67 buf += sizeof(cmsUInt32Number);
68
69 } while (--longs);
70
71 }
72
73 #else
74 #define byteReverse(buf, len)
75 #endif
76
77
78 typedef struct {
79
80 cmsUInt32Number buf[4];
81 cmsUInt32Number bits[2];
82 cmsUInt8Number in[64];
83 cmsContext ContextID;
84
85 } _cmsMD5;
86
87 #define F1(x, y, z) (z ^ (x & (y ^ z)))
88 #define F2(x, y, z) F1(z, x, y)
89 #define F3(x, y, z) (x ^ y ^ z)
90 #define F4(x, y, z) (y ^ (x | ~z))
91
92 #define STEP(f, w, x, y, z, data, s) \
93 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
94
95
96 static
cmsMD5_Transform(cmsUInt32Number buf[4],cmsUInt32Number in[16])97 void cmsMD5_Transform(cmsUInt32Number buf[4], cmsUInt32Number in[16])
98 {
99 CMSREGISTER cmsUInt32Number a, b, c, d;
100
101 a = buf[0];
102 b = buf[1];
103 c = buf[2];
104 d = buf[3];
105
106 STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
107 STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
108 STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
109 STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
110 STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
111 STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
112 STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
113 STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
114 STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
115 STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
116 STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
117 STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
118 STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
119 STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
120 STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
121 STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
122
123 STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
124 STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
125 STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
126 STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
127 STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
128 STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
129 STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
130 STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
131 STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
132 STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
133 STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
134 STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
135 STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
136 STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
137 STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
138 STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
139
140 STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
141 STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
142 STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
143 STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
144 STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
145 STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
146 STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
147 STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
148 STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
149 STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
150 STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
151 STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
152 STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
153 STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
154 STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
155 STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
156
157 STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
158 STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
159 STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
160 STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
161 STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
162 STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
163 STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
164 STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
165 STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
166 STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
167 STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
168 STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
169 STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
170 STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
171 STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
172 STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
173
174 buf[0] += a;
175 buf[1] += b;
176 buf[2] += c;
177 buf[3] += d;
178 }
179
180
181 // Create a MD5 object
182
cmsMD5alloc(cmsContext ContextID)183 cmsHANDLE CMSEXPORT cmsMD5alloc(cmsContext ContextID)
184 {
185 _cmsMD5* ctx = (_cmsMD5*) _cmsMallocZero(ContextID, sizeof(_cmsMD5));
186 if (ctx == NULL) return NULL;
187
188 ctx ->ContextID = ContextID;
189
190 ctx->buf[0] = 0x67452301;
191 ctx->buf[1] = 0xefcdab89;
192 ctx->buf[2] = 0x98badcfe;
193 ctx->buf[3] = 0x10325476;
194
195 ctx->bits[0] = 0;
196 ctx->bits[1] = 0;
197
198 return (cmsHANDLE) ctx;
199 }
200
cmsMD5add(cmsHANDLE Handle,const cmsUInt8Number * buf,cmsUInt32Number len)201 void CMSEXPORT cmsMD5add(cmsHANDLE Handle, const cmsUInt8Number* buf, cmsUInt32Number len)
202 {
203 _cmsMD5* ctx = (_cmsMD5*) Handle;
204 cmsUInt32Number t;
205
206 t = ctx->bits[0];
207 if ((ctx->bits[0] = t + (len << 3)) < t)
208 ctx->bits[1]++;
209
210 ctx->bits[1] += len >> 29;
211
212 t = (t >> 3) & 0x3f;
213
214 if (t) {
215
216 cmsUInt8Number *p = (cmsUInt8Number *) ctx->in + t;
217
218 t = 64 - t;
219 if (len < t) {
220 memmove(p, buf, len);
221 return;
222 }
223
224 memmove(p, buf, t);
225 byteReverse(ctx->in, 16);
226
227 cmsMD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
228 buf += t;
229 len -= t;
230 }
231
232 while (len >= 64) {
233 memmove(ctx->in, buf, 64);
234 byteReverse(ctx->in, 16);
235 cmsMD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
236 buf += 64;
237 len -= 64;
238 }
239
240 memmove(ctx->in, buf, len);
241 }
242
243 // Destroy the object and return the checksum
cmsMD5finish(cmsProfileID * ProfileID,cmsHANDLE Handle)244 void CMSEXPORT cmsMD5finish(cmsProfileID* ProfileID, cmsHANDLE Handle)
245 {
246 _cmsMD5* ctx = (_cmsMD5*) Handle;
247 cmsUInt32Number count;
248 cmsUInt8Number *p;
249
250 count = (ctx->bits[0] >> 3) & 0x3F;
251
252 p = ctx->in + count;
253 *p++ = 0x80;
254
255 count = 64 - 1 - count;
256
257 if (count < 8) {
258
259 memset(p, 0, count);
260 byteReverse(ctx->in, 16);
261 cmsMD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
262
263 memset(ctx->in, 0, 56);
264 } else {
265 memset(p, 0, count - 8);
266 }
267 byteReverse(ctx->in, 14);
268
269 ((cmsUInt32Number *) ctx->in)[14] = ctx->bits[0];
270 ((cmsUInt32Number *) ctx->in)[15] = ctx->bits[1];
271
272 cmsMD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
273
274 byteReverse((cmsUInt8Number *) ctx->buf, 4);
275 memmove(ProfileID ->ID8, ctx->buf, 16);
276
277 _cmsFree(ctx ->ContextID, ctx);
278 }
279
280
281
282 // Assuming io points to an ICC profile, compute and store MD5 checksum
283 // In the header, rendering intentent, attributes and ID should be set to zero
284 // before computing MD5 checksum (per 6.1.13 in ICC spec)
285
cmsMD5computeID(cmsHPROFILE hProfile)286 cmsBool CMSEXPORT cmsMD5computeID(cmsHPROFILE hProfile)
287 {
288 cmsContext ContextID;
289 cmsUInt32Number BytesNeeded;
290 cmsUInt8Number* Mem = NULL;
291 cmsHANDLE MD5 = NULL;
292 _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile;
293 _cmsICCPROFILE Keep;
294
295 _cmsAssert(hProfile != NULL);
296
297 ContextID = cmsGetProfileContextID(hProfile);
298
299 // Save a copy of the profile header
300 memmove(&Keep, Icc, sizeof(_cmsICCPROFILE));
301
302 // Set RI, attributes and ID
303 memset(&Icc ->attributes, 0, sizeof(Icc ->attributes));
304 Icc ->RenderingIntent = 0;
305 memset(&Icc ->ProfileID, 0, sizeof(Icc ->ProfileID));
306
307 // Compute needed storage
308 if (!cmsSaveProfileToMem(hProfile, NULL, &BytesNeeded)) goto Error;
309
310 // Allocate memory
311 Mem = (cmsUInt8Number*) _cmsMalloc(ContextID, BytesNeeded);
312 if (Mem == NULL) goto Error;
313
314 // Save to temporary storage
315 if (!cmsSaveProfileToMem(hProfile, Mem, &BytesNeeded)) goto Error;
316
317 // Create MD5 object
318 MD5 = cmsMD5alloc(ContextID);
319 if (MD5 == NULL) goto Error;
320
321 // Add all bytes
322 cmsMD5add(MD5, Mem, BytesNeeded);
323
324 // Temp storage is no longer needed
325 _cmsFree(ContextID, Mem);
326
327 // Restore header
328 memmove(Icc, &Keep, sizeof(_cmsICCPROFILE));
329
330 // And store the ID
331 cmsMD5finish(&Icc ->ProfileID, MD5);
332 return TRUE;
333
334 Error:
335
336 // Free resources as something went wrong
337 // "MD5" cannot be other than NULL here, so no need to free it
338 if (Mem != NULL) _cmsFree(ContextID, Mem);
339 memmove(Icc, &Keep, sizeof(_cmsICCPROFILE));
340 return FALSE;
341 }
342
343