|
sl@0
|
1 |
/*
|
|
sl@0
|
2 |
* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
sl@0
|
3 |
* All rights reserved.
|
|
sl@0
|
4 |
* This component and the accompanying materials are made available
|
|
sl@0
|
5 |
* under the terms of the License "Eclipse Public License v1.0"
|
|
sl@0
|
6 |
* which accompanies this distribution, and is available
|
|
sl@0
|
7 |
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
sl@0
|
8 |
*
|
|
sl@0
|
9 |
* Initial Contributors:
|
|
sl@0
|
10 |
* Nokia Corporation - initial contribution.
|
|
sl@0
|
11 |
*
|
|
sl@0
|
12 |
* Contributors:
|
|
sl@0
|
13 |
*
|
|
sl@0
|
14 |
* Description:
|
|
sl@0
|
15 |
*
|
|
sl@0
|
16 |
*/
|
|
sl@0
|
17 |
|
|
sl@0
|
18 |
|
|
sl@0
|
19 |
#include <asymmetric.h>
|
|
sl@0
|
20 |
#include <asymmetrickeys.h>
|
|
sl@0
|
21 |
#include <bigint.h>
|
|
sl@0
|
22 |
#include <cryptostrength.h>
|
|
sl@0
|
23 |
#include <securityerr.h>
|
|
sl@0
|
24 |
#include <cryptopanic.h>
|
|
sl@0
|
25 |
#include "rsafunction.h"
|
|
sl@0
|
26 |
|
|
sl@0
|
27 |
/* CRSAPKCS1v15Decryptor */
|
|
sl@0
|
28 |
|
|
sl@0
|
29 |
EXPORT_C CRSAPKCS1v15Decryptor* CRSAPKCS1v15Decryptor::NewL(
|
|
sl@0
|
30 |
const CRSAPrivateKey& aKey)
|
|
sl@0
|
31 |
{
|
|
sl@0
|
32 |
CRSAPKCS1v15Decryptor* self = NewLC(aKey);
|
|
sl@0
|
33 |
CleanupStack::Pop(self);
|
|
sl@0
|
34 |
return self;
|
|
sl@0
|
35 |
}
|
|
sl@0
|
36 |
|
|
sl@0
|
37 |
EXPORT_C CRSAPKCS1v15Decryptor* CRSAPKCS1v15Decryptor::NewLC(
|
|
sl@0
|
38 |
const CRSAPrivateKey& aKey)
|
|
sl@0
|
39 |
{
|
|
sl@0
|
40 |
CRSAPKCS1v15Decryptor* self = new(ELeave) CRSAPKCS1v15Decryptor(aKey);
|
|
sl@0
|
41 |
CleanupStack::PushL(self);
|
|
sl@0
|
42 |
self->ConstructL();
|
|
sl@0
|
43 |
return self;
|
|
sl@0
|
44 |
}
|
|
sl@0
|
45 |
|
|
sl@0
|
46 |
TInt CRSAPKCS1v15Decryptor::MaxInputLength(void) const
|
|
sl@0
|
47 |
{
|
|
sl@0
|
48 |
return iPrivateKey.N().ByteCount();
|
|
sl@0
|
49 |
}
|
|
sl@0
|
50 |
|
|
sl@0
|
51 |
TInt CRSAPKCS1v15Decryptor::MaxOutputLength(void) const
|
|
sl@0
|
52 |
{
|
|
sl@0
|
53 |
return MaxInputLength() - iPadding->MinPaddingLength();
|
|
sl@0
|
54 |
}
|
|
sl@0
|
55 |
|
|
sl@0
|
56 |
void CRSAPKCS1v15Decryptor::DecryptL(const TDesC8& aInput,
|
|
sl@0
|
57 |
TDes8& aOutput)const
|
|
sl@0
|
58 |
{
|
|
sl@0
|
59 |
__ASSERT_DEBUG(aOutput.MaxLength() >= MaxOutputLength(), User::Panic(KCryptoPanic, ECryptoPanicOutputDescriptorOverflow));
|
|
sl@0
|
60 |
__ASSERT_DEBUG(aInput.Length() <= MaxInputLength(), User::Panic(KCryptoPanic, ECryptoPanicInputTooLarge));
|
|
sl@0
|
61 |
|
|
sl@0
|
62 |
RInteger input = RInteger::NewL(aInput);
|
|
sl@0
|
63 |
CleanupStack::PushL(input);
|
|
sl@0
|
64 |
|
|
sl@0
|
65 |
RInteger output;
|
|
sl@0
|
66 |
|
|
sl@0
|
67 |
RSAFunction::DecryptL(iPrivateKey, input, output);
|
|
sl@0
|
68 |
CleanupStack::PushL(output);
|
|
sl@0
|
69 |
|
|
sl@0
|
70 |
TPtrC8 ptr = *(output.BufferLC());
|
|
sl@0
|
71 |
iPadding->UnPadL(ptr, aOutput);
|
|
sl@0
|
72 |
|
|
sl@0
|
73 |
CleanupStack::PopAndDestroy(3, &input); //BufferLC(), output, input
|
|
sl@0
|
74 |
}
|
|
sl@0
|
75 |
|
|
sl@0
|
76 |
CRSAPKCS1v15Decryptor::CRSAPKCS1v15Decryptor(const CRSAPrivateKey& aKey)
|
|
sl@0
|
77 |
: iPrivateKey(aKey)
|
|
sl@0
|
78 |
{
|
|
sl@0
|
79 |
}
|
|
sl@0
|
80 |
|
|
sl@0
|
81 |
void CRSAPKCS1v15Decryptor::ConstructL(void)
|
|
sl@0
|
82 |
{
|
|
sl@0
|
83 |
iPadding = CPaddingPKCS1Encryption::NewL(MaxInputLength());
|
|
sl@0
|
84 |
|
|
sl@0
|
85 |
// Check if MaxInputLength() makes sense, if not the key length must
|
|
sl@0
|
86 |
// be too small
|
|
sl@0
|
87 |
if(MaxOutputLength() <= 0)
|
|
sl@0
|
88 |
{
|
|
sl@0
|
89 |
User::Leave(KErrKeySize);
|
|
sl@0
|
90 |
}
|
|
sl@0
|
91 |
|
|
sl@0
|
92 |
TCrypto::IsAsymmetricWeakEnoughL(iPrivateKey.N().BitCount());
|
|
sl@0
|
93 |
}
|
|
sl@0
|
94 |
|
|
sl@0
|
95 |
CRSAPKCS1v15Decryptor::~CRSAPKCS1v15Decryptor(void)
|
|
sl@0
|
96 |
{
|
|
sl@0
|
97 |
delete iPadding;
|
|
sl@0
|
98 |
}
|