cryptoservices/certificateandkeymgmt/asn1/baseenc.cpp
author Pat Downey <patd@symbian.org>
Wed, 01 Sep 2010 12:40:57 +0100
branchRCL_3
changeset 96 a71299154b21
parent 8 35751d3474b7
permissions -rw-r--r--
Revert incorrect RCL_3 drop: Revision: 201035 Kit: 201035
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
8
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     1
/*
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     2
* Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     3
* All rights reserved.
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     4
* This component and the accompanying materials are made available
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     5
* under the terms of the License "Eclipse Public License v1.0"
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     6
* which accompanies this distribution, and is available
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     7
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     8
*
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
     9
* Initial Contributors:
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    10
* Nokia Corporation - initial contribution.
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    11
*
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    12
* Contributors:
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    13
*
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    14
* Description: 
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    15
* Define methods for asn1-encoding base class
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    16
*
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    17
*/
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    18
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    19
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    20
#include "base128enc.h"
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    21
#include "panic.h"
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    22
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    23
#include <asn1enc.h>
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    24
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    25
const TUint KMaxLowNumberFormTag = 30;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    26
const TUint KMaxShortFormLength = 127;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    27
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    28
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    29
EXPORT_C CASN1EncBase::CASN1EncBase(const TTagType aType, const TASN1Class aClass)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    30
: iType(aType), iClass(aClass)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    31
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    32
	CalculateTagLengthDER();
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    33
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    34
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    35
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    36
EXPORT_C CASN1EncBase::~CASN1EncBase()
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    37
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    38
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    39
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    40
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    41
EXPORT_C void CASN1EncBase::ConstructL()
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    42
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    43
	ContentsLengthChanged();
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    44
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    45
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    46
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    47
void CASN1EncBase::ContentsLengthChanged()
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    48
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    49
	CalculateContentsLengthDER();
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    50
	CalculateLengthLengthDER();
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    51
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    52
	if (iParent)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    53
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    54
		iParent->ContentsLengthChanged();
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    55
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    56
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    57
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    58
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    59
// Set tagging scheme/tag/class
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    60
EXPORT_C void CASN1EncBase::SetTag(const TTagType aType, const TASN1Class aClass)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    61
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    62
	iType = aType;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    63
	iClass = aClass;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    64
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    65
	CalculateTagLengthDER();
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    66
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    67
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    68
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    69
// Gives total number of octets in the DER encoding of this object
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    70
EXPORT_C TUint CASN1EncBase::LengthDER() const
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    71
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    72
	return iTagLengthDER + iLengthLengthDER + iContentsLengthDER;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    73
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    74
	
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    75
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    76
// Writes entire DER encoding of this object into the given buffer
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    77
EXPORT_C void CASN1EncBase::WriteDERL(TDes8& aBuf, TUint& aPos) const
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    78
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    79
	__ASSERT_ALWAYS(aBuf.Length() - STATIC_CAST(TInt, aPos) >= STATIC_CAST(TInt, LengthDER()),
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    80
		Panic(KErrDescriptorTooShort));
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    81
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    82
	WriteHelperL(aBuf, aPos, iTagLengthDER,      &CASN1EncBase::WriteTagDERL);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    83
	WriteHelperL(aBuf, aPos, iLengthLengthDER,   &CASN1EncBase::WriteLengthDER);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    84
	WriteHelperL(aBuf, aPos, iContentsLengthDER, &CASN1EncBase::WriteContentsDERL);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    85
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    86
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    87
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    88
// Internal helper method, used for efficiency
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    89
void CASN1EncBase::WriteHelperL(TDes8& aBuf, TUint& aPos, const TUint aLength,
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    90
									WriteFunc aWriteFunc) const
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    91
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    92
	if (aLength)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    93
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    94
		// Get the middle bit of buffer we should be using
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    95
		TPtr8 ptr(&aBuf[aPos], aLength, aLength);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    96
		
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    97
		// Call the function to actually write the data
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    98
		(this->*aWriteFunc)(ptr);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
    99
		
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   100
		aPos += aLength;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   101
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   102
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   103
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   104
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   105
// Give number of octets in tag section
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   106
void CASN1EncBase::CalculateTagLengthDER()
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   107
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   108
	if (iType <= KMaxLowNumberFormTag)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   109
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   110
		// Low tag number form
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   111
		iTagLengthDER = 1;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   112
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   113
	else
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   114
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   115
		// High tag number form
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   116
		TASN1EncBase128DER encoder(iType);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   117
		iTagLengthDER = encoder.LengthDER() + 1;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   118
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   119
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   120
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   121
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   122
// Give number of octets in length section
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   123
// Only called after contents length is worked out
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   124
void CASN1EncBase::CalculateLengthLengthDER()
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   125
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   126
	iLengthLengthDER = 1;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   127
	if (iContentsLengthDER > KMaxShortFormLength)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   128
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   129
		// Long form - need number of octets in base256 representation
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   130
		// of length, plus 1.
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   131
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   132
		TUint working = iContentsLengthDER;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   133
		do
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   134
			{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   135
			++iLengthLengthDER;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   136
			}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   137
		while (working >>= 8);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   138
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   139
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   140
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   141
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   142
// Writes the tag section into the given buffer
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   143
void CASN1EncBase::WriteTagDERL(TDes8& aBuf) const
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   144
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   145
	// Write class - bits 7-8
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   146
	aBuf[0] = STATIC_CAST(TUint8, iClass << 6);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   147
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   148
	// Write constructed/primitive flag in bit 6
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   149
	if (IsConstructed())
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   150
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   151
		aBuf[0] |= 0x20;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   152
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   153
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   154
	// Write length
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   155
	if (iType <= KMaxLowNumberFormTag)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   156
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   157
		aBuf[0] |= iType;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   158
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   159
	else
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   160
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   161
		// First byte signals more to come
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   162
		aBuf[0] |= 0x1F;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   163
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   164
		// The rest we delegate
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   165
		TASN1EncBase128DER encoder(iType);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   166
		TUint offset = 1;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   167
		encoder.WriteDERL(aBuf, offset);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   168
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   169
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   170
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   171
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   172
// Writes the length section into the given buffer
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   173
void CASN1EncBase::WriteLengthDER(TDes8& aBuf) const
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   174
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   175
	if (iContentsLengthDER > KMaxShortFormLength)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   176
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   177
		// First byte is the number of other bytes, with top bit also set
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   178
		TUint octets = iLengthLengthDER - 1;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   179
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   180
		// Cast takes 8 least sig bits
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   181
		aBuf[0] = STATIC_CAST(TUint8, octets);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   182
		aBuf[0] |= 0x80;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   183
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   184
		// Other bytes are base 256 representation of length, most significant first
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   185
		TUint working = iContentsLengthDER;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   186
		do
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   187
			{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   188
			// Cast to TUint8 takes 8 least sig bits
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   189
			aBuf[octets] = STATIC_CAST(TUint8, working);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   190
			working >>= 8;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   191
			}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   192
		while (--octets);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   193
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   194
	else
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   195
		{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   196
		// Short form, nice and easy - take least sig 8 bits with a cast
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   197
		aBuf[0] = STATIC_CAST(TUint8, iContentsLengthDER);
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   198
		}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   199
	}
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   200
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   201
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   202
// Sets the parent (can only do this once)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   203
void CASN1EncBase::SetParent(CASN1EncBase* aParent)
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   204
	{
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   205
	__ASSERT_ALWAYS(iParent == 0, Panic(KErrAlreadyHasParent));
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   206
	iParent = aParent;
35751d3474b7 Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents: 0
diff changeset
   207
	}