1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/security/crypto/weakcrypto/source/random/random.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,183 @@
1.4 +/*
1.5 +* Copyright (c) 2005-2009 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 +* (c) 1999-2003 Symbian Ltd
1.19 +*
1.20 +*/
1.21 +
1.22 +
1.23 +/**
1.24 + @file
1.25 +*/
1.26 +
1.27 +#include <e32std.h>
1.28 +#include <random.h>
1.29 +#include <hash.h>
1.30 +#include <e32math.h>
1.31 +#include "randsvr.h"
1.32 +#include "randcliserv.h"
1.33 +
1.34 +_LIT(KRandomServerImg,"z:\\system\\libs\\randsvr.exe"); // DLL/EXE name
1.35 +_LIT(KRandomServerConnect, "Randsvr connect");
1.36 +_LIT(KRandomServerGet, "Randsvr get");
1.37 +
1.38 +const TUid KServerUid3={0x100066dc};
1.39 +
1.40 +extern "C" {
1.41 +EXPORT_C void RAND_bytes(unsigned char* buf,int bytes)
1.42 + {
1.43 + TPtr8 ptr(buf,bytes,bytes);
1.44 + buf[0]++;
1.45 + TRandom::Random(ptr);
1.46 + }
1.47 +}
1.48 +
1.49 +EXPORT_C CRandom::CRandom(void)
1.50 + {
1.51 + }
1.52 +
1.53 +EXPORT_C CSystemRandom* CSystemRandom::NewL(void)
1.54 + {
1.55 + CSystemRandom* self = new(ELeave)CSystemRandom();
1.56 + return self;
1.57 + }
1.58 +
1.59 +EXPORT_C CSystemRandom* CSystemRandom::NewLC(void)
1.60 + {
1.61 + CSystemRandom* self = NewL();
1.62 + CleanupStack::PushL(self);
1.63 + return self;
1.64 + }
1.65 +
1.66 +void CSystemRandom::GenerateBytesL(TDes8& aDest)
1.67 + {
1.68 + TRandom::RandomL(aDest);
1.69 + }
1.70 +
1.71 +CSystemRandom::CSystemRandom(void)
1.72 + {
1.73 + }
1.74 +
1.75 +EXPORT_C void TRandom::Random(TDes8& aDestination)
1.76 + {
1.77 + RRandomSession rs;
1.78 + TRAPD(ret,rs.ConnectL());
1.79 + if (ret)
1.80 + {
1.81 + User::Panic(KRandomServerConnect, ret);
1.82 + }
1.83 + TInt err=rs.GetRandom(aDestination);
1.84 + if (err)
1.85 + {
1.86 + User::Panic(KRandomServerGet, err);
1.87 + }
1.88 + rs.Close();
1.89 + }
1.90 +
1.91 +EXPORT_C void TRandom::RandomL(TDes8& aDestination)
1.92 + {
1.93 + RRandomSession rs;
1.94 + TRAPD(ret,rs.ConnectL());
1.95 + User::LeaveIfError(ret);
1.96 + CleanupClosePushL(rs);
1.97 +
1.98 + TInt err=rs.GetRandom(aDestination);
1.99 + User::LeaveIfError(err);
1.100 +
1.101 + CleanupStack::PopAndDestroy(); // rs
1.102 + }
1.103 +
1.104 +EXPORT_C RRandomSession::RRandomSession(void)
1.105 + {
1.106 + }
1.107 +
1.108 +static TInt StartServer()
1.109 +// Borrowed from AndrewT's server startup code.
1.110 +// Start the server process/thread which lives in an EPOCEXE object
1.111 +//
1.112 + {
1.113 +
1.114 + const TUidType serverUid(KNullUid,KNullUid,KServerUid3);
1.115 +
1.116 + //
1.117 + // EPOC and EKA2 is easy, we just create a new server process. Simultaneous
1.118 + // launching of two such processes should be detected when the second one
1.119 + // attempts to create the server object, failing with KErrAlreadyExists.
1.120 + //
1.121 + RProcess server;
1.122 + TInt r=server.Create(KRandomServerImg, KNullDesC, serverUid);
1.123 +
1.124 + if (r!=KErrNone)
1.125 + return r;
1.126 + TRequestStatus stat;
1.127 + server.Rendezvous(stat);
1.128 + if (stat!=KRequestPending)
1.129 + server.Kill(0); // abort startup
1.130 + else
1.131 + server.Resume(); // logon OK - start the server
1.132 + User::WaitForRequest(stat); // wait for start or death
1.133 + // we can't use the 'exit reason' if the server panicked as this
1.134 + // is the panic 'reason' and may be '0' which cannot be distinguished
1.135 + // from KErrNone
1.136 + r=(server.ExitType()==EExitPanic) ? KErrGeneral : stat.Int();
1.137 + server.Close();
1.138 + return r;
1.139 +
1.140 + }
1.141 +
1.142 +EXPORT_C void RRandomSession::ConnectL(void)
1.143 + {
1.144 + TInt retry=2;
1.145 + for (;;)
1.146 + {
1.147 + TInt r=CreateSession(KRandomServerName,TVersion(0,0,0),1);
1.148 + if (r!=KErrNotFound && r!=KErrServerTerminated)
1.149 + User::Leave(r);
1.150 + if (--retry==0)
1.151 + User::Leave(r);
1.152 + r=StartServer();
1.153 + if (r!=KErrNone && r!=KErrAlreadyExists)
1.154 + User::Leave(r);
1.155 + }
1.156 + }
1.157 +
1.158 +EXPORT_C TInt RRandomSession::GetRandom(TDes8& aDestination)
1.159 + {
1.160 + if (aDestination.Length()<KRandomBlockSize)
1.161 + {
1.162 + return SendReceive(CRandomSession::KRandomRequest,
1.163 + TIpcArgs(&aDestination, aDestination.Length()));
1.164 + }
1.165 + else
1.166 + {
1.167 + TInt i;
1.168 + TInt err=KErrNone;
1.169 + TInt length=aDestination.Length();
1.170 + for (i=0;(i+KRandomBlockSize)<length;i+=KRandomBlockSize)
1.171 + {
1.172 + TPtr8 buffer(&aDestination[i],KRandomBlockSize,KRandomBlockSize);
1.173 + err=SendReceive(CRandomSession::KRandomRequest,
1.174 + TIpcArgs(&buffer, KRandomBlockSize));
1.175 + if (err)
1.176 + {
1.177 + return err;
1.178 + }
1.179 + }
1.180 + TPtr8 buffer(&aDestination[i],length%KRandomBlockSize,KRandomBlockSize);
1.181 + err=SendReceive(CRandomSession::KRandomRequest,
1.182 + TIpcArgs(&buffer, length-i));
1.183 + return err;
1.184 + }
1.185 + }
1.186 +