--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/lcms2/src/cmsmd5.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,306 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System
+//  Copyright (c) 1998-2023 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];
+
+} _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 cmsMD5_Transform(cmsUInt32Number buf[4], cmsUInt32Number in[16])
+{
+    CMSREGISTER 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
+
+cmsHANDLE CMSEXPORT cmsMD5alloc(cmsContext ContextID)
+{
+    _cmsMD5* ctx = (_cmsMD5*) _cmsMallocZero(ContextID, sizeof(_cmsMD5));
+    if (ctx == NULL) return NULL;
+
+    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;
+}
+
+void CMSEXPORT cmsMD5add(cmsHANDLE Handle, const 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);
+
+        cmsMD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
+        buf += t;
+        len -= t;
+    }
+
+    while (len >= 64) {
+        memmove(ctx->in, buf, 64);
+        byteReverse(ctx->in, 16);
+        cmsMD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
+        buf += 64;
+        len -= 64;
+    }
+
+    memmove(ctx->in, buf, len);
+}
+
+// Destroy the object and return the checksum
+void CMSEXPORT cmsMD5finish(cmsContext ContextID, 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);
+        cmsMD5_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];
+
+    cmsMD5_Transform(ctx->buf, (cmsUInt32Number *) ctx->in);
+
+    byteReverse((cmsUInt8Number *) ctx->buf, 4);
+    memmove(ProfileID ->ID8, ctx->buf, 16);
+
+    _cmsFree(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(cmsContext ContextID, cmsHPROFILE hProfile)
+{
+    cmsUInt32Number BytesNeeded;
+    cmsUInt8Number* Mem = NULL;
+    cmsHANDLE  MD5 = NULL;
+    _cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile;
+    _cmsICCPROFILE Keep;
+
+    _cmsAssert(hProfile != NULL);
+
+    // 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(ContextID, hProfile, NULL, &BytesNeeded)) goto Error;
+
+    // Allocate memory
+    Mem = (cmsUInt8Number*) _cmsMalloc(ContextID, BytesNeeded);
+    if (Mem == NULL) goto Error;
+
+    // Save to temporary storage
+    if (!cmsSaveProfileToMem(ContextID, hProfile, Mem, &BytesNeeded)) goto Error;
+
+    // Create MD5 object
+    MD5 = cmsMD5alloc(ContextID);
+    if (MD5 == NULL) goto Error;
+
+    // Add all bytes
+    cmsMD5add(MD5, Mem, BytesNeeded);
+
+    // Temp storage is no longer needed
+    _cmsFree(ContextID, Mem);
+
+    // Restore header
+    memmove(Icc, &Keep, sizeof(_cmsICCPROFILE));
+
+    // And store the ID
+    cmsMD5finish(ContextID, &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;
+}