1 //--------------------------------------------------------------------------------- 2 // 3 // Little Color Management System 4 // Copyright (c) 1998-2016 Marti Maria Saguer 5 // 6 // Permission is hereby granted, free of charge, to any person obtaining 7 // a copy of this software and associated documentation files (the "Software"), 8 // to deal in the Software without restriction, including without limitation 9 // the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 // and/or sell copies of the Software, and to permit persons to whom the Software 11 // is furnished to do so, subject to the following conditions: 12 // 13 // The above copyright notice and this permission notice shall be included in 14 // all copies or substantial portions of the Software. 15 // 16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO 18 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 // 24 //--------------------------------------------------------------------------------- 25 26 27 #include "lcms2_internal.h" 28 29 #ifdef CMS_USE_BIG_ENDIAN 30 31 static 32 void byteReverse(cmsUInt8Number * buf, cmsUInt32Number longs) 33 { 34 do { 35 36 cmsUInt32Number t = _cmsAdjustEndianess32(*(cmsUInt32Number *) buf); 37 *(cmsUInt32Number *) buf = t; 38 buf += sizeof(cmsUInt32Number); 39 40 } while (--longs); 41 42 } 43 44 #else 45 #define byteReverse(buf, len) 46 #endif 47 48 49 typedef struct { 50 51 cmsUInt32Number buf[4]; 52 cmsUInt32Number bits[2]; 53 cmsUInt8Number in[64]; 54 cmsContext ContextID; 55 56 } _cmsMD5; 57 58 #define F1(x, y, z) (z ^ (x & (y ^ z))) 59 #define F2(x, y, z) F1(z, x, y) 60 #define F3(x, y, z) (x ^ y ^ z) 61 #define F4(x, y, z) (y ^ (x | ~z)) 62 63 #define STEP(f, w, x, y, z, data, s) \ 64 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) 65 66 67 static 68 void MD5_Transform(cmsUInt32Number buf[4], cmsUInt32Number in[16]) 69 70 { 71 register cmsUInt32Number a, b, c, d; 72 73 a = buf[0]; 74 b = buf[1]; 75 c = buf[2]; 76 d = buf[3]; 77 78 STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); 79 STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); 80 STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); 81 STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); 82 STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); 83 STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); 84 STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); 85 STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); 86 STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); 87 STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); 88 STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); 89 STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); 90 STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); 91 STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); 92 STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); 93 STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); 94 95 STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); 96 STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); 97 STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); 98 STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); 99 STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); 100 STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); 101 STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); 102 STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); 103 STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); 104 STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); 105 STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); 106 STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); 107 STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); 108 STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); 109 STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); 110 STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); 111 112 STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); 113 STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); 114 STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); 115 STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); 116 STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); 117 STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); 118 STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); 119 STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); 120 STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); 121 STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); 122 STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); 123 STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); 124 STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); 125 STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); 126 STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); 127 STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); 128 129 STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); 130 STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); 131 STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); 132 STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); 133 STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); 134 STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); 135 STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); 136 STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); 137 STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); 138 STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); 139 STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); 140 STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); 141 STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); 142 STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); 143 STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); 144 STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); 145 146 buf[0] += a; 147 buf[1] += b; 148 buf[2] += c; 149 buf[3] += d; 150 } 151 152 153 // Create a MD5 object 154 static 155 cmsHANDLE MD5alloc(cmsContext ContextID) 156 { 157 _cmsMD5* ctx = (_cmsMD5*) _cmsMallocZero(ContextID, sizeof(_cmsMD5)); 158 if (ctx == NULL) return NULL; 159 160 ctx ->ContextID = ContextID; 161 162 ctx->buf[0] = 0x67452301; 163 ctx->buf[1] = 0xefcdab89; 164 ctx->buf[2] = 0x98badcfe; 165 ctx->buf[3] = 0x10325476; 166 167 ctx->bits[0] = 0; 168 ctx->bits[1] = 0; 169 170 return (cmsHANDLE) ctx; 171 } 172 173 174 static 175 void MD5add(cmsHANDLE Handle, cmsUInt8Number* buf, cmsUInt32Number len) 176 { 177 _cmsMD5* ctx = (_cmsMD5*) Handle; 178 cmsUInt32Number t; 179 180 t = ctx->bits[0]; 181 if ((ctx->bits[0] = t + (len << 3)) < t) 182 ctx->bits[1]++; 183 184 ctx->bits[1] += len >> 29; 185 186 t = (t >> 3) & 0x3f; 187 188 if (t) { 189 190 cmsUInt8Number *p = (cmsUInt8Number *) ctx->in + t; 191 192 t = 64 - t; 193 if (len < t) { 194 memmove(p, buf, len); 195 return; 196 } 197 198 memmove(p, buf, t); 199 byteReverse(ctx->in, 16); 200 201 MD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in); 202 buf += t; 203 len -= t; 204 } 205 206 while (len >= 64) { 207 memmove(ctx->in, buf, 64); 208 byteReverse(ctx->in, 16); 209 MD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in); 210 buf += 64; 211 len -= 64; 212 } 213 214 memmove(ctx->in, buf, len); 215 } 216 217 // Destroy the object and return the checksum 218 static 219 void MD5finish(cmsProfileID* ProfileID, cmsHANDLE Handle) 220 { 221 _cmsMD5* ctx = (_cmsMD5*) Handle; 222 cmsUInt32Number count; 223 cmsUInt8Number *p; 224 225 count = (ctx->bits[0] >> 3) & 0x3F; 226 227 p = ctx->in + count; 228 *p++ = 0x80; 229 230 count = 64 - 1 - count; 231 232 if (count < 8) { 233 234 memset(p, 0, count); 235 byteReverse(ctx->in, 16); 236 MD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in); 237 238 memset(ctx->in, 0, 56); 239 } else { 240 memset(p, 0, count - 8); 241 } 242 byteReverse(ctx->in, 14); 243 244 ((cmsUInt32Number *) ctx->in)[14] = ctx->bits[0]; 245 ((cmsUInt32Number *) ctx->in)[15] = ctx->bits[1]; 246 247 MD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in); 248 249 byteReverse((cmsUInt8Number *) ctx->buf, 4); 250 memmove(ProfileID ->ID8, ctx->buf, 16); 251 252 _cmsFree(ctx ->ContextID, ctx); 253 } 254 255 256 257 // Assuming io points to an ICC profile, compute and store MD5 checksum 258 // In the header, rendering intentent, attributes and ID should be set to zero 259 // before computing MD5 checksum (per 6.1.13 in ICC spec) 260 261 cmsBool CMSEXPORT cmsMD5computeID(cmsHPROFILE hProfile) 262 { 263 cmsContext ContextID; 264 cmsUInt32Number BytesNeeded; 265 cmsUInt8Number* Mem = NULL; 266 cmsHANDLE MD5 = NULL; 267 _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile; 268 _cmsICCPROFILE Keep; 269 270 _cmsAssert(hProfile != NULL); 271 272 ContextID = cmsGetProfileContextID(hProfile); 273 274 // Save a copy of the profile header 275 memmove(&Keep, Icc, sizeof(_cmsICCPROFILE)); 276 277 // Set RI, attributes and ID 278 memset(&Icc ->attributes, 0, sizeof(Icc ->attributes)); 279 Icc ->RenderingIntent = 0; 280 memset(&Icc ->ProfileID, 0, sizeof(Icc ->ProfileID)); 281 282 // Compute needed storage 283 if (!cmsSaveProfileToMem(hProfile, NULL, &BytesNeeded)) goto Error; 284 285 // Allocate memory 286 Mem = (cmsUInt8Number*) _cmsMalloc(ContextID, BytesNeeded); 287 if (Mem == NULL) goto Error; 288 289 // Save to temporary storage 290 if (!cmsSaveProfileToMem(hProfile, Mem, &BytesNeeded)) goto Error; 291 292 // Create MD5 object 293 MD5 = MD5alloc(ContextID); 294 if (MD5 == NULL) goto Error; 295 296 // Add all bytes 297 MD5add(MD5, Mem, BytesNeeded); 298 299 // Temp storage is no longer needed 300 _cmsFree(ContextID, Mem); 301 302 // Restore header 303 memmove(Icc, &Keep, sizeof(_cmsICCPROFILE)); 304 305 // And store the ID 306 MD5finish(&Icc ->ProfileID, MD5); 307 return TRUE; 308 309 Error: 310 311 // Free resources as something went wrong 312 // "MD5" cannot be other than NULL here, so no need to free it 313 if (Mem != NULL) _cmsFree(ContextID, Mem); 314 memmove(Icc, &Keep, sizeof(_cmsICCPROFILE)); 315 return FALSE; 316 } 317 318
