/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation . Oracle designates this
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// This file is available under and governed by the GNU General Public
// License version 2 only, as published by the Free Software Foundation.
// However, the following notice accompanied the original version of this
// file:
//
//---------------------------------------------------------------------------------
//
// Little Color Management System
// Copyright (c) 1998-2022 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 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 ] + 0 xd76aa478, 7 );
STEP(F1, d, a, b, c, in[1 ] + 0 xe8c7b756, 12 );
STEP(F1, c, d, a, b, in[2 ] + 0 x242070db, 17 );
STEP(F1, b, c, d, a, in[3 ] + 0 xc1bdceee, 22 );
STEP(F1, a, b, c, d, in[4 ] + 0 xf57c0faf, 7 );
STEP(F1, d, a, b, c, in[5 ] + 0 x4787c62a, 12 );
STEP(F1, c, d, a, b, in[6 ] + 0 xa8304613, 17 );
STEP(F1, b, c, d, a, in[7 ] + 0 xfd469501, 22 );
STEP(F1, a, b, c, d, in[8 ] + 0 x698098d8, 7 );
STEP(F1, d, a, b, c, in[9 ] + 0 x8b44f7af, 12 );
STEP(F1, c, d, a, b, in[10 ] + 0 xffff5bb1, 17 );
STEP(F1, b, c, d, a, in[11 ] + 0 x895cd7be, 22 );
STEP(F1, a, b, c, d, in[12 ] + 0 x6b901122, 7 );
STEP(F1, d, a, b, c, in[13 ] + 0 xfd987193, 12 );
STEP(F1, c, d, a, b, in[14 ] + 0 xa679438e, 17 );
STEP(F1, b, c, d, a, in[15 ] + 0 x49b40821, 22 );
STEP(F2, a, b, c, d, in[1 ] + 0 xf61e2562, 5 );
STEP(F2, d, a, b, c, in[6 ] + 0 xc040b340, 9 );
STEP(F2, c, d, a, b, in[11 ] + 0 x265e5a51, 14 );
STEP(F2, b, c, d, a, in[0 ] + 0 xe9b6c7aa, 20 );
STEP(F2, a, b, c, d, in[5 ] + 0 xd62f105d, 5 );
STEP(F2, d, a, b, c, in[10 ] + 0 x02441453, 9 );
STEP(F2, c, d, a, b, in[15 ] + 0 xd8a1e681, 14 );
STEP(F2, b, c, d, a, in[4 ] + 0 xe7d3fbc8, 20 );
STEP(F2, a, b, c, d, in[9 ] + 0 x21e1cde6, 5 );
STEP(F2, d, a, b, c, in[14 ] + 0 xc33707d6, 9 );
STEP(F2, c, d, a, b, in[3 ] + 0 xf4d50d87, 14 );
STEP(F2, b, c, d, a, in[8 ] + 0 x455a14ed, 20 );
STEP(F2, a, b, c, d, in[13 ] + 0 xa9e3e905, 5 );
STEP(F2, d, a, b, c, in[2 ] + 0 xfcefa3f8, 9 );
STEP(F2, c, d, a, b, in[7 ] + 0 x676f02d9, 14 );
STEP(F2, b, c, d, a, in[12 ] + 0 x8d2a4c8a, 20 );
STEP(F3, a, b, c, d, in[5 ] + 0 xfffa3942, 4 );
STEP(F3, d, a, b, c, in[8 ] + 0 x8771f681, 11 );
STEP(F3, c, d, a, b, in[11 ] + 0 x6d9d6122, 16 );
STEP(F3, b, c, d, a, in[14 ] + 0 xfde5380c, 23 );
STEP(F3, a, b, c, d, in[1 ] + 0 xa4beea44, 4 );
STEP(F3, d, a, b, c, in[4 ] + 0 x4bdecfa9, 11 );
STEP(F3, c, d, a, b, in[7 ] + 0 xf6bb4b60, 16 );
STEP(F3, b, c, d, a, in[10 ] + 0 xbebfbc70, 23 );
STEP(F3, a, b, c, d, in[13 ] + 0 x289b7ec6, 4 );
STEP(F3, d, a, b, c, in[0 ] + 0 xeaa127fa, 11 );
STEP(F3, c, d, a, b, in[3 ] + 0 xd4ef3085, 16 );
STEP(F3, b, c, d, a, in[6 ] + 0 x04881d05, 23 );
STEP(F3, a, b, c, d, in[9 ] + 0 xd9d4d039, 4 );
STEP(F3, d, a, b, c, in[12 ] + 0 xe6db99e5, 11 );
STEP(F3, c, d, a, b, in[15 ] + 0 x1fa27cf8, 16 );
STEP(F3, b, c, d, a, in[2 ] + 0 xc4ac5665, 23 );
STEP(F4, a, b, c, d, in[0 ] + 0 xf4292244, 6 );
STEP(F4, d, a, b, c, in[7 ] + 0 x432aff97, 10 );
STEP(F4, c, d, a, b, in[14 ] + 0 xab9423a7, 15 );
STEP(F4, b, c, d, a, in[5 ] + 0 xfc93a039, 21 );
STEP(F4, a, b, c, d, in[12 ] + 0 x655b59c3, 6 );
STEP(F4, d, a, b, c, in[3 ] + 0 x8f0ccc92, 10 );
STEP(F4, c, d, a, b, in[10 ] + 0 xffeff47d, 15 );
STEP(F4, b, c, d, a, in[1 ] + 0 x85845dd1, 21 );
STEP(F4, a, b, c, d, in[8 ] + 0 x6fa87e4f, 6 );
STEP(F4, d, a, b, c, in[15 ] + 0 xfe2ce6e0, 10 );
STEP(F4, c, d, a, b, in[6 ] + 0 xa3014314, 15 );
STEP(F4, b, c, d, a, in[13 ] + 0 x4e0811a1, 21 );
STEP(F4, a, b, c, d, in[4 ] + 0 xf7537e82, 6 );
STEP(F4, d, a, b, c, in[11 ] + 0 xbd3af235, 10 );
STEP(F4, c, d, a, b, in[2 ] + 0 x2ad7d2bb, 15 );
STEP(F4, b, c, d, a, in[9 ] + 0 xeb86d391, 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 ->ContextID = ContextID;
ctx->buf[0 ] = 0 x67452301;
ctx->buf[1 ] = 0 xefcdab89;
ctx->buf[2 ] = 0 x98badcfe;
ctx->buf[3 ] = 0 x10325476;
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 ) & 0 x3f;
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(cmsProfileID* ProfileID, cmsHANDLE Handle)
{
_cmsMD5* ctx = (_cmsMD5*) Handle;
cmsUInt32Number count;
cmsUInt8Number *p;
count = (ctx->bits[0 ] >> 3 ) & 0 x3F;
p = ctx->in + count;
*p++ = 0 x80;
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(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 = 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(&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 ;
}
Messung V0.5 in Prozent C=89 H=89 G=88
¤ Dauer der Verarbeitung: 0.5 Sekunden
¤
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