third_party/lcms/src/cmsmd5.c - pdfium - Git at Google

 //---------------------------------------------------------------------------------
 //
 //  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];
     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] + 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 ->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;
 }

 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(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(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;
 }
	//---------------------------------------------------------------------------------
	//
	// 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];
	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] + 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 ->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;
	}

	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(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(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;
	}