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Diffstat (limited to 'third_party/lcms/src/cmsmd5.c')
-rw-r--r--third_party/lcms/src/cmsmd5.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/third_party/lcms/src/cmsmd5.c b/third_party/lcms/src/cmsmd5.c
new file mode 100644
index 0000000000..a4758ff662
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+++ b/third_party/lcms/src/cmsmd5.c
@@ -0,0 +1,343 @@
+//---------------------------------------------------------------------------------
+//
+// Little Color Management System
+// Copyright (c) 1998-2012 Marti Maria Saguer
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the Software
+// is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+//---------------------------------------------------------------------------------
+
+#include "lcms2_internal.h"
+
+#ifdef CMS_USE_BIG_ENDIAN
+
+static
+void byteReverse(cmsUInt8Number * buf, cmsUInt32Number longs)
+{
+ do {
+
+ cmsUInt32Number t = _cmsAdjustEndianess32(*(cmsUInt32Number *) buf);
+ *(cmsUInt32Number *) buf = t;
+ buf += sizeof(cmsUInt32Number);
+
+ } while (--longs);
+
+}
+
+#else
+#define byteReverse(buf, len)
+#endif
+
+
+typedef struct {
+
+ cmsUInt32Number buf[4];
+ cmsUInt32Number bits[2];
+ cmsUInt8Number in[64];
+ cmsContext ContextID;
+
+} _cmsMD5;
+
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+#define STEP(f, w, x, y, z, data, s) \
+ ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
+
+
+static
+void MD5_Transform(cmsUInt32Number buf[4], cmsUInt32Number in[16])
+
+{
+ register cmsUInt32Number a, b, c, d;
+
+ a = buf[0];
+ b = buf[1];
+ c = buf[2];
+ d = buf[3];
+
+ STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+ STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+ STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+ STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+ STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+ STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+ STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+ STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+ STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+ STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+ STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+ STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+ STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+ STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+ STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+ STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+ STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+ STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+ STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+ STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+ STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+ STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+ STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+ STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+ STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+ STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+ STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+ STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+ STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+ STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+ STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+ STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+ STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+ STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+ STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+ STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+ STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+ STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+ STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+ STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+ STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+ STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+ STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+ STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+ STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+ STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+ STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+ STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+ STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+ STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+ STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+ STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+ STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+ STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+ STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+ STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+ STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+ STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+ STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+ STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+ STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+ STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+ STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+ STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+ buf[0] += a;
+ buf[1] += b;
+ buf[2] += c;
+ buf[3] += d;
+}
+
+
+// Create a MD5 object
+static
+cmsHANDLE MD5alloc(cmsContext ContextID)
+{
+ _cmsMD5* ctx = (_cmsMD5*) _cmsMallocZero(ContextID, sizeof(_cmsMD5));
+ if (ctx == NULL) return NULL;
+
+ ctx ->ContextID = ContextID;
+
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
+
+ ctx->bits[0] = 0;
+ ctx->bits[1] = 0;
+
+ return (cmsHANDLE) ctx;
+}
+
+
+static
+void MD5add(cmsHANDLE Handle, cmsUInt8Number* buf, cmsUInt32Number len)
+{
+ _cmsMD5* ctx = (_cmsMD5*) Handle;
+ cmsUInt32Number t;
+
+ t = ctx->bits[0];
+ if ((ctx->bits[0] = t + (len << 3)) < t)
+ ctx->bits[1]++;
+
+ ctx->bits[1] += len >> 29;
+
+ t = (t >> 3) & 0x3f;
+
+ if (t) {
+
+ cmsUInt8Number *p = (cmsUInt8Number *) ctx->in + t;
+
+ t = 64 - t;
+ if (len < t) {
+ memmove(p, buf, len);
+ return;
+ }
+
+ memmove(p, buf, t);
+ byteReverse(ctx->in, 16);
+
+ MD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
+ buf += t;
+ len -= t;
+ }
+
+ while (len >= 64) {
+ memmove(ctx->in, buf, 64);
+ byteReverse(ctx->in, 16);
+ MD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
+ buf += 64;
+ len -= 64;
+ }
+
+ memmove(ctx->in, buf, len);
+}
+
+// Destroy the object and return the checksum
+static
+void MD5finish(cmsProfileID* ProfileID, cmsHANDLE Handle)
+{
+ _cmsMD5* ctx = (_cmsMD5*) Handle;
+ cmsUInt32Number count;
+ cmsUInt8Number *p;
+
+ count = (ctx->bits[0] >> 3) & 0x3F;
+
+ p = ctx->in + count;
+ *p++ = 0x80;
+
+ count = 64 - 1 - count;
+
+ if (count < 8) {
+
+ memset(p, 0, count);
+ byteReverse(ctx->in, 16);
+ MD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
+
+ memset(ctx->in, 0, 56);
+ } else {
+ memset(p, 0, count - 8);
+ }
+ byteReverse(ctx->in, 14);
+
+ ((cmsUInt32Number *) ctx->in)[14] = ctx->bits[0];
+ ((cmsUInt32Number *) ctx->in)[15] = ctx->bits[1];
+
+ MD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
+
+ byteReverse((cmsUInt8Number *) ctx->buf, 4);
+ memmove(ProfileID ->ID8, ctx->buf, 16);
+
+ _cmsFree(ctx ->ContextID, ctx);
+}
+
+
+
+// Assuming io points to an ICC profile, compute and store MD5 checksum
+// In the header, rendering intentent, attributes and ID should be set to zero
+// before computing MD5 checksum (per 6.1.13 in ICC spec)
+
+cmsBool CMSEXPORT cmsMD5computeID(cmsHPROFILE hProfile)
+{
+ cmsContext ContextID;
+ cmsUInt32Number BytesNeeded;
+ cmsUInt8Number* Mem = NULL;
+ cmsHANDLE MD5 = NULL;
+ _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile;
+ _cmsICCPROFILE Keep;
+
+ _cmsAssert(hProfile != NULL);
+
+ ContextID = cmsGetProfileContextID(hProfile);
+
+ // Save a copy of the profile header
+ memmove(&Keep, Icc, sizeof(_cmsICCPROFILE));
+
+ // Set RI, attributes and ID
+ memset(&Icc ->attributes, 0, sizeof(Icc ->attributes));
+ Icc ->RenderingIntent = 0;
+ memset(&Icc ->ProfileID, 0, sizeof(Icc ->ProfileID));
+
+ // Compute needed storage
+ if (!cmsSaveProfileToMem(hProfile, NULL, &BytesNeeded)) goto Error;
+
+ // Allocate memory
+ Mem = (cmsUInt8Number*) _cmsMalloc(ContextID, BytesNeeded);
+ if (Mem == NULL) goto Error;
+
+ // Save to temporary storage
+ if (!cmsSaveProfileToMem(hProfile, Mem, &BytesNeeded)) goto Error;
+
+ // Create MD5 object
+ MD5 = MD5alloc(ContextID);
+ if (MD5 == NULL) goto Error;
+
+ // Add all bytes
+ MD5add(MD5, Mem, BytesNeeded);
+
+ // Temp storage is no longer needed
+ _cmsFree(ContextID, Mem);
+
+ // Restore header
+ memmove(Icc, &Keep, sizeof(_cmsICCPROFILE));
+
+ // And store the ID
+ MD5finish(&Icc ->ProfileID, MD5);
+ return TRUE;
+
+Error:
+
+ // Free resources as something went wrong
+ // "MD5" cannot be other than NULL here, so no need to free it
+ if (Mem != NULL) _cmsFree(ContextID, Mem);
+ memmove(Icc, &Keep, sizeof(_cmsICCPROFILE));
+ return FALSE;
+}
+
+cmsBool CMSEXPORT cmsMD5computeIDExt(const void* buf, unsigned long size, unsigned char ProfileID[16])
+{
+ cmsHANDLE MD5;
+ cmsUInt8Number* Mem;
+
+ if (buf == NULL)
+ return FALSE;
+ MD5 = NULL;
+ Mem = (cmsUInt8Number*)_cmsMalloc(NULL,size);
+ memmove(Mem,buf,size);
+ // Create MD5 object
+ MD5 = MD5alloc(NULL);
+ if (MD5 == NULL) goto Error;
+
+ // Add all bytes
+ MD5add(MD5, Mem, size);
+
+ // Temp storage is no longer needed
+ _cmsFree(NULL, Mem);
+
+ // And store the ID
+ MD5finish((cmsProfileID*)ProfileID, MD5);
+ return TRUE;
+Error:
+ if (MD5 != NULL) _cmsFree(NULL, MD5);
+ return FALSE;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 13:57:58 +0000