1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/security/crypto/weakcryptospi/test/tplugins/src/hmacimpl.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,247 @@
1.4 +/*
1.5 +* Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies).
1.6 +* All rights reserved.
1.7 +* This component and the accompanying materials are made available
1.8 +* under the terms of the License "Eclipse Public License v1.0"
1.9 +* which accompanies this distribution, and is available
1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.11 +*
1.12 +* Initial Contributors:
1.13 +* Nokia Corporation - initial contribution.
1.14 +*
1.15 +* Contributors:
1.16 +*
1.17 +* Description:
1.18 +* software hmac implementation
1.19 +* software hmac implementation
1.20 +*
1.21 +*/
1.22 +
1.23 +
1.24 +/**
1.25 + @file
1.26 +*/
1.27 +
1.28 +#include "hmacimpl.h"
1.29 +#include "pluginconfig.h"
1.30 +#include "md2impl.h"
1.31 +#include "md5impl.h"
1.32 +#include "sha1impl.h"
1.33 +#include <cryptospi/keys.h>
1.34 +
1.35 +using namespace SoftwareCrypto;
1.36 +
1.37 +CHMacImpl* CHMacImpl::NewL(const CKey& aKey, MSoftwareHash* aHash)
1.38 + {
1.39 + CHMacImpl* self=NewLC(aKey, aHash);
1.40 + CleanupStack::Pop();
1.41 + return self;
1.42 + }
1.43 +
1.44 +CHMacImpl* CHMacImpl::NewLC(const CKey& aKey, MSoftwareHash* aHash)
1.45 + {
1.46 + CHMacImpl* self=new(ELeave) CHMacImpl();
1.47 + CleanupStack::PushL(self);
1.48 + self->ConstructL(aKey, aHash);
1.49 + return self;
1.50 + }
1.51 +
1.52 +CHMacImpl* CHMacImpl::NewL(MSoftwareHash* aHash)
1.53 + {
1.54 + CHMacImpl* self=NewLC(aHash);
1.55 + CleanupStack::Pop();
1.56 + return self;
1.57 + }
1.58 +
1.59 +CHMacImpl* CHMacImpl::NewLC(MSoftwareHash* aHash)
1.60 + {
1.61 + CHMacImpl* self=new(ELeave) CHMacImpl();
1.62 + CleanupStack::PushL(self);
1.63 + self->ConstructL(aHash);
1.64 + return self;
1.65 + }
1.66 +
1.67 +
1.68 +CHMacImpl::CHMacImpl()
1.69 + : iInnerPad(KHMacPad), iOuterPad(KHMacPad)
1.70 + {
1.71 + }
1.72 +
1.73 +CHMacImpl::CHMacImpl(const CHMacImpl& aMD)
1.74 + : iDigest(NULL), iInnerPad(aMD.iInnerPad), iOuterPad(aMD.iOuterPad)
1.75 + {
1.76 + }
1.77 +
1.78 +CHMacImpl::~CHMacImpl()
1.79 + {
1.80 + if (iDigest)
1.81 + {
1.82 + iDigest->Close();
1.83 + }
1.84 + }
1.85 +
1.86 +void CHMacImpl::ConstructL(const CKey& aKey, MSoftwareHash* aHash)
1.87 + {
1.88 + //Clone the hash implementation
1.89 + iDigest=static_cast<MSoftwareHash*>(aHash->ReplicateL());
1.90 + const TDesC8& keyContent=aKey.GetTDesC8L(KHmacKeyParameterUid);
1.91 + Initialise(keyContent);
1.92 + }
1.93 +
1.94 +void CHMacImpl::ConstructL(MSoftwareHash* aHash)
1.95 + {
1.96 + //Clone the hash implementation
1.97 + iDigest=static_cast<MSoftwareHash*>(aHash->ReplicateL());
1.98 + }
1.99 +
1.100 +
1.101 +void CHMacImpl::Initialise(const TDesC8& aKey)
1.102 + {
1.103 + // initialisation
1.104 + if (iDigest)
1.105 + {
1.106 + iDigest->Reset();
1.107 + if( (TUint32)aKey.Size() > KHMacPad)
1.108 + {
1.109 + iInnerPad = iDigest->Final(aKey);
1.110 + }
1.111 + else
1.112 + {
1.113 + iInnerPad = aKey;
1.114 + }
1.115 +
1.116 + TUint i;
1.117 + for (i=iInnerPad.Size();i<KHMacPad;i++)
1.118 + iInnerPad.Append(0);
1.119 +
1.120 + iOuterPad=iInnerPad;
1.121 +
1.122 + const TUint8 Magic1=0x36, Magic2=0x5c;
1.123 + for (i=0;i<KHMacPad;i++)
1.124 + {
1.125 + iInnerPad[i]^=Magic1;
1.126 + iOuterPad[i]^=Magic2;
1.127 + }
1.128 + //start inner hash
1.129 + iDigest->Hash(iInnerPad);
1.130 + }
1.131 + }
1.132 +
1.133 +MHash* CHMacImpl::CopyL()
1.134 + {
1.135 + CHMacImpl* that=new(ELeave) CHMacImpl(*this);
1.136 + CleanupStack::PushL(that);
1.137 + that->iDigest=iDigest ? static_cast<MSoftwareHash*>(iDigest->CopyL()) : NULL;
1.138 + CleanupStack::Pop();
1.139 + return that;
1.140 + }
1.141 +
1.142 +MHash* CHMacImpl::ReplicateL()
1.143 + {
1.144 + CHMacImpl* that=new(ELeave) CHMacImpl(*this);
1.145 + CleanupStack::PushL(that);
1.146 + that->iDigest=iDigest ? static_cast<MSoftwareHash*>(iDigest->ReplicateL()) : NULL;
1.147 + that->Reset();
1.148 + CleanupStack::Pop();
1.149 + return that;
1.150 + }
1.151 +
1.152 +void CHMacImpl::Reset()
1.153 + {
1.154 + if (iDigest)
1.155 + {
1.156 + iDigest->Reset();
1.157 + iDigest->Update(iInnerPad);
1.158 + }
1.159 + }
1.160 +
1.161 +TPtrC8 CHMacImpl::Hash(const TDesC8& aMessage)
1.162 + {
1.163 + TPtrC8 ptr(KNullDesC8());
1.164 + TPtrC8 finalPtr(KNullDesC8());
1.165 + StoreState();
1.166 + if (iDigest)
1.167 + {
1.168 + ptr.Set(iDigest->Final(aMessage));
1.169 + iDigest->Update(iOuterPad);
1.170 + finalPtr.Set(iDigest->Final(ptr));
1.171 + }
1.172 +
1.173 + RestoreState();
1.174 + iDigest->Update(aMessage);
1.175 +
1.176 + return (finalPtr);
1.177 + }
1.178 +
1.179 +void CHMacImpl::Update(const TDesC8& aMessage)
1.180 + {
1.181 + if(iDigest)
1.182 + {
1.183 + iDigest->Update(aMessage);
1.184 + }
1.185 + }
1.186 +
1.187 +TPtrC8 CHMacImpl::Final(const TDesC8& aMessage)
1.188 + {
1.189 + TPtrC8 ptr(KNullDesC8());
1.190 + if(iDigest)
1.191 + {
1.192 + ptr.Set(iDigest->Final(aMessage));
1.193 + iDigest->Update(iOuterPad);
1.194 + iDigest->Final(ptr);
1.195 + Reset();
1.196 + }
1.197 + return (ptr);
1.198 + }
1.199 +
1.200 +void CHMacImpl::RestoreState()
1.201 + {
1.202 + iOuterPad.Copy(iOuterPadCopy);
1.203 + iInnerPad.Copy(iInnerPadCopy);
1.204 + if (iDigest)
1.205 + {
1.206 + iDigest->RestoreState();
1.207 + }
1.208 + }
1.209 +
1.210 +void CHMacImpl::StoreState()
1.211 + {
1.212 + iOuterPadCopy.Copy(iOuterPad);
1.213 + iInnerPadCopy.Copy(iInnerPad);
1.214 + if (iDigest)
1.215 + {
1.216 + iDigest->StoreState();
1.217 + }
1.218 + }
1.219 +
1.220 +void CHMacImpl::SetKeyL(const CKey& aKey)
1.221 + {
1.222 + const TDesC8& keyContent=aKey.GetTDesC8L(KHmacKeyParameterUid);
1.223 + Initialise(keyContent);
1.224 + }
1.225 +
1.226 +void CHMacImpl::Close()
1.227 + {
1.228 + delete this;
1.229 + }
1.230 +
1.231 +void CHMacImpl::GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics)
1.232 + {
1.233 + iDigest->GetCharacteristicsL(aPluginCharacteristics);
1.234 + }
1.235 +
1.236 +const CExtendedCharacteristics* CHMacImpl::GetExtendedCharacteristicsL()
1.237 + {
1.238 + return iDigest->GetExtendedCharacteristicsL();
1.239 + }
1.240 +
1.241 +TAny* CHMacImpl::GetExtension(TUid /*aExtensionId*/)
1.242 + {
1.243 + return NULL;
1.244 + }
1.245 +
1.246 +void CHMacImpl::SetOperationModeL(TUid /*aOperationMode*/)
1.247 + {
1.248 + User::Leave(KErrNotSupported);
1.249 + }
1.250 +