--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcrypto/source/hash/md2.cpp Thu Jun 24 15:39:07 2010 +0530
@@ -0,0 +1,256 @@
+/*
+* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+* (c) 2003 Symbian Ltd. All rights reserved.
+*
+*/
+
+
+/**
+ @file
+*/
+
+#include <e32std.h>
+#include <hash.h>
+
+#define EXPANDLOOP
+
+//
+// 32bit endianness independent MD2 implementation
+//
+CMD2::CMD2(void)
+: CMessageDigest(),iHash(MD2_HASH)
+ {
+ }
+CMD2::CMD2(const CMD2& aMD)
+: CMessageDigest(aMD),iHash(aMD.iHash),iNum(aMD.iNum)
+ {
+ (void)Mem::Copy(iData,aMD.iData,sizeof(iData));
+ (void)Mem::Copy(iChecksum,aMD.iChecksum,sizeof(iChecksum));
+ (void)Mem::Copy(iState,aMD.iState,sizeof(iState));
+ }
+EXPORT_C CMD2* CMD2::NewL(void)
+ {
+ return (new(ELeave) CMD2);
+ }
+EXPORT_C CMessageDigest* CMD2::ReplicateL(void)
+ {
+ return NewL();
+ }
+EXPORT_C CMD2::~CMD2(void)
+ {
+ }
+
+EXPORT_C TPtrC8 CMD2::Hash(const TDesC8& aMessage)
+ {
+ TPtrC8 ptr(KNullDesC8());
+ DoUpdate(aMessage.Ptr(),aMessage.Size());
+ StoreState();
+ DoFinal();
+ ptr.Set(iHash);
+ RestoreState();
+ return ptr;
+ }
+
+EXPORT_C CMessageDigest* CMD2::CopyL(void)
+ {
+ return new(ELeave) CMD2(*this);
+ }
+EXPORT_C TInt CMD2::BlockSize(void)
+ {
+ return sizeof(iData);
+ }
+EXPORT_C TInt CMD2::HashSize(void)
+ {
+ return MD2_HASH;
+ }
+EXPORT_C void CMD2::Reset(void)
+ {
+ Mem::FillZ(iData,sizeof(iData));
+ Mem::FillZ(iChecksum,sizeof(iChecksum));
+ Mem::FillZ(iState,sizeof(iState));
+ iNum=0;
+ }
+
+EXPORT_C void CMD2::Update(const TDesC8& aMessage)
+ {
+ DoUpdate(aMessage.Ptr(),aMessage.Size());
+ }
+
+EXPORT_C TPtrC8 CMD2::Final(const TDesC8& aMessage)
+ {
+ TPtrC8 ptr(KNullDesC8());
+ DoUpdate(aMessage.Ptr(),aMessage.Size());
+ DoFinal();
+ ptr.Set(iHash);
+ Reset();
+ return ptr;
+ }
+
+EXPORT_C TPtrC8 CMD2::Final()
+ {
+ TPtrC8 ptr(KNullDesC8());
+ DoFinal();
+ ptr.Set(iHash);
+ Reset();
+ return ptr;
+ }
+
+void CMD2::DoUpdate(const TUint8* aData,TUint aLength)
+ {
+ TBool carryOn=ETrue;
+ if (iNum)
+ {
+ if (iNum+aLength>=(TUint)MD2_BLOCK)
+ {
+ const TUint temp=MD2_BLOCK-iNum;
+ (void)Mem::Copy(iData+iNum,aData,temp);
+ Block(iData);
+ aData+=temp;
+ aLength-=temp;
+ iNum=0;
+ }
+ else
+ {
+ (void)Mem::Copy(iData+iNum,aData,aLength);
+ iNum+=aLength;
+ carryOn=EFalse;
+ }
+ }
+ // processing by block of MD2_BLOCK
+ if (carryOn)
+ {
+ while (aLength>=(TUint)MD2_BLOCK)
+ {
+ Block(aData);
+ aData+=MD2_BLOCK;
+ aLength-=MD2_BLOCK;
+ }
+ (void)Mem::Copy(iData,aData,aLength);
+ iNum=aLength;
+ }
+ }
+static inline TUint CMD2_S(TUint& elt,TUint8 val)
+ {
+ return elt^=val;
+ }
+//
+// data must be MD2_BLOCK bytes long
+//
+void CMD2::Block(const TUint8* data)
+ {
+ static const TUint8 S[256]={
+ 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01,
+ 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
+ 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C,
+ 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
+ 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
+ 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
+ 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49,
+ 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
+ 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F,
+ 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
+ 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27,
+ 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
+ 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1,
+ 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
+ 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
+ 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
+ 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20,
+ 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
+ 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6,
+ 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
+ 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A,
+ 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
+ 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09,
+ 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
+ 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
+ 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
+ 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D,
+ 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
+ 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4,
+ 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
+ 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A,
+ 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14,
+ };
+ TUint state[MD2_BLOCK*3];
+ TUint j=iChecksum[MD2_BLOCK-1];
+ TUint i=0,temp=0;
+ while (i<(TUint)MD2_BLOCK)
+ {
+ const TUint tempState=iState[i];
+ temp=data[i];
+ state[i]=tempState;
+ state[i+16]=temp;
+ state[i+32]=temp^tempState;
+ j=CMD2_S(iChecksum[i++],S[temp^j]);
+ }
+ temp=0;
+ TUint* pstate=state;
+ const TUint *pend=state+(MD2_BLOCK*3);
+ for (i=0; i<18; i++)
+ {
+ while (pstate<pend)
+ {
+ temp=CMD2_S(*pstate,S[temp]);pstate++;
+ temp=CMD2_S(*pstate,S[temp]);pstate++;
+ temp=CMD2_S(*pstate,S[temp]);pstate++;
+ temp=CMD2_S(*pstate,S[temp]);pstate++;
+ temp=CMD2_S(*pstate,S[temp]);pstate++;
+ temp=CMD2_S(*pstate,S[temp]);pstate++;
+ temp=CMD2_S(*pstate,S[temp]);pstate++;
+ temp=CMD2_S(*pstate,S[temp]);pstate++;
+ }
+ pstate=state;
+ temp=(temp+i)&0xff;
+ }
+ (void)Mem::Copy(iState,state,MD2_BLOCK*sizeof(TUint));
+ }
+void CMD2::DoFinal()
+ {
+ const TUint pad=MD2_BLOCK-iNum;
+ if (pad>0)
+ Mem::Fill(iData+iNum,(TUint8)pad,pad);
+ Block(iData);
+
+ TUint8* pData=iData;
+ const TUint8* pEnd=iData+MD2_BLOCK;
+ const TUint* pChecksum=iChecksum;
+ while (pData<pEnd)
+ {
+ *pData=(TUint8)*pChecksum;//checksum is always less than 255
+ pData++;
+ pChecksum++;
+ }
+ Block(iData);
+
+ TUint* pState=iState;
+ for (TUint i=0;i<(TUint)MD2_BLOCK;i++,pState++) //safe: iState and iHash have got same size
+ iHash[i]=(TUint8)(*pState&0xff);
+ }
+
+void CMD2::RestoreState()
+{
+ Mem::Copy(&iData[0], &iDataTemp[0], MD2_BLOCK);
+ Mem::Copy(&iChecksum[0], &iChecksumTemp[0], MD2_BLOCK*sizeof(TUint));
+ Mem::Copy(&iState[0], &iStateTemp[0], MD2_BLOCK*sizeof(TUint));
+}
+
+void CMD2::StoreState()
+{
+ Mem::Copy(&iDataTemp[0], &iData[0], MD2_BLOCK);
+ Mem::Copy(&iChecksumTemp[0], &iChecksum[0], MD2_BLOCK*sizeof(TUint));
+ Mem::Copy(&iStateTemp[0], &iState[0], MD2_BLOCK*sizeof(TUint));
+}
+