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os/security/cryptoservices/certificateandkeymgmt/inc/asn1dec.h
author sl@SLION-WIN7.fritz.box
Fri, 15 Jun 2012 03:10:57 +0200
changeset 0 bde4ae8d615e
permissions -rw-r--r--
First public contribution. 
     1 /*

     2 * Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * ASN1 decoder

    16 *

    17 */

    18 

    19 

    20 /**

    21  @file 

    22  @publishedAll

    23  @released

    24 */

    25  

    26 #ifndef __ASN1DEC_H__

    27 #define __ASN1DEC_H__

    28 

    29 #include <e32std.h>

    30 #include <e32base.h>

    31 #include <asn1cons.h>

    32 

    33 class RInteger;

    34 

    35 

    36 class TASN1DecGeneric

    37 	{

    38 public:

    39 	IMPORT_C explicit TASN1DecGeneric(const TDesC8& aSource);

    40 	IMPORT_C void InitL();

    41 	IMPORT_C TPtrC8 Encoding() const;

    42 	IMPORT_C TInt LengthDER() const;

    43 	IMPORT_C TPtrC8 GetContentDER(void) const;

    44 	IMPORT_C TInt LengthDERContent(void) const;

    45 	IMPORT_C TInt LengthDERHeader() const;

    46 	IMPORT_C TTagType Tag() const;

    47 	IMPORT_C TASN1Class Class() const;

    48 private:

    49 	TPtrC8 iEncoding;

    50 	TInt iStartOfContents;

    51 	TInt iLength;

    52 	TTagType iExplicitTag;

    53 	TASN1Class iClass;

    54 	};

    55 

    56 class TASN1DecString

    57 	{

    58 public:

    59 protected:

    60 	IMPORT_C TASN1DecString(const TTagType aTag);

    61 	virtual TInt CheckValid(const TDesC8& aSource)=0;

    62 	};

    63 

    64 class TASN1DecBoolean

    65 	{

    66 public:

    67 	IMPORT_C TASN1DecBoolean();

    68 	IMPORT_C TBool DecodeDERL(const TDesC8& aSource,TInt& aPos);

    69 	IMPORT_C TBool DecodeDERL(const TASN1DecGeneric& Source);

    70 private:

    71 	};

    72 

    73 class TASN1DecNull

    74 	{

    75 public:

    76 	IMPORT_C TASN1DecNull();

    77 	IMPORT_C void DecodeDERL(const TDesC8& aSource,TInt& aPos);

    78 	IMPORT_C void DecodeDERL(const TASN1DecGeneric& aSource);

    79 	};

    80 

    81 class TASN1DecEnumerated

    82 	{

    83 public:

    84 	IMPORT_C TASN1DecEnumerated(void);

    85 	};

    86 

    87 class TASN1DecInteger

    88 	{

    89 public:

    90 	IMPORT_C TASN1DecInteger();

    91 	IMPORT_C TInt DecodeDERShortL(const TDesC8& aSource,TInt& aPos);

    92 	IMPORT_C TInt DecodeDERShortL(const TASN1DecGeneric& aSource);

    93 	IMPORT_C RInteger DecodeDERLongL(const TDesC8& aSource,TInt& aPos);

    94 	IMPORT_C RInteger DecodeDERLongL(const TASN1DecGeneric& aSource);

    95 	};

    96 

    97 const TInt KNumberOfIDs=15;

    98 

    99 class TASN1DecObjectIdentifier

   100 	{

   101 public:

   102 	IMPORT_C TASN1DecObjectIdentifier();

   103 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   104 	IMPORT_C HBufC* DecodeDERL(const TASN1DecGeneric& aSource);

   105 private:

   106 	TInt DecodeContentsL(TFixedArray<TInt, KNumberOfIDs>& aOID, const TDesC8& aSource);

   107 	};

   108 

   109 class TASN1DecSet

   110 	{

   111 public:

   112 	IMPORT_C TASN1DecSet();

   113 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* NewDERLC(const TDesC8& aSource);

   114 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* DecodeDERLC(const TDesC8& aSource,TInt& aPos);

   115 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* DecodeDERLC(const TASN1DecGeneric& aSource);

   116 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* DecodeDERLC(const TDesC8& aSource,TInt& aPos, TInt aMin, TInt aMax);

   117 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* DecodeDERLC(const TASN1DecGeneric& aSource, TInt aMin, TInt aMax);

   118 protected:

   119 	/** @internalComponent */

   120 	void DecodeContentsL(const TDesC8& aSource, TInt& aPos, CArrayPtrFlat<TASN1DecGeneric>& aDest);

   121 	/** @internalComponent */

   122 	static void CleanupSet(TAny* aArray);	

   123 	};

   124 

   125 class TASN1DecGraphicString

   126 	{

   127 public:

   128 	IMPORT_C TASN1DecGraphicString();

   129 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   130 protected:

   131 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   132 private:

   133 	HBufC* DecodeContentsL(const TDesC8& aSource);

   134 	};

   135 

   136 class TASN1DecVisibleString

   137 	{

   138 public:

   139 	IMPORT_C TASN1DecVisibleString(void);

   140 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   141 protected:

   142 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   143 private:

   144 	HBufC* DecodeContentsL(const TDesC8& aSource);

   145 	};

   146 

   147 class TASN1DecGeneralizedTime

   148 	{

   149 public:

   150 	IMPORT_C TASN1DecGeneralizedTime();

   151 	IMPORT_C TTime DecodeDERL(const TDesC8& aSource, TInt& aPos);

   152 	IMPORT_C TTime DecodeDERL(const TASN1DecGeneric& aGen);

   153 private:

   154 	TTime GetTimeL(const TDesC8& aSource);

   155 	};

   156 

   157 class TASN1DecUTCTime

   158 	{

   159 public:

   160 	IMPORT_C TASN1DecUTCTime();

   161 	IMPORT_C TTime DecodeDERL(const TASN1DecGeneric& aGen);

   162 	IMPORT_C TTime DecodeDERL(const TDesC8& aSource, TInt& aPos);

   163 private:

   164 	TTime GetTimeL(const TDesC8& aSource);

   165 	};

   166 

   167 class TASN1DecBitString

   168 	{

   169 public:

   170 	IMPORT_C TASN1DecBitString();

   171 	IMPORT_C HBufC8* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   172 	IMPORT_C HBufC8* DecodeDERL(const TASN1DecGeneric& aSource);

   173 	//we need the next 2 functions because many standards encode things as bit

   174 	//strings

   175 	IMPORT_C HBufC8* ExtractOctetStringL(const TDesC8& aSource,TInt& aPos);

   176 	IMPORT_C HBufC8* ExtractOctetStringL(const TASN1DecGeneric& aSource);

   177 	};

   178 

   179 class TASN1DecIA5String

   180 	{

   181 public:

   182 	IMPORT_C TASN1DecIA5String();

   183 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   184 	IMPORT_C HBufC* DecodeDERL(const TASN1DecGeneric& aSource);

   185 protected:

   186 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   187 private:

   188 	HBufC* DecodeContentsL(const TDesC8& aSource);

   189 	};

   190 

   191 

   192 class TASN1DecUTF8String

   193 	{

   194 public:

   195 	IMPORT_C TASN1DecUTF8String();

   196 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   197 	IMPORT_C HBufC* DecodeDERL(const TASN1DecGeneric& aSource);

   198 protected:

   199 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   200 private:

   201 	HBufC* DecodeContentsL(const TDesC8& aSource);

   202 	};

   203 

   204 class TASN1DecGeneralString

   205 	{

   206 public:

   207 	IMPORT_C TASN1DecGeneralString();

   208 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   209 protected:

   210 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   211 private:

   212 	HBufC* DecodeContentsL(const TDesC8& aSource);

   213 	};

   214 

   215 class TASN1DecOctetString

   216 	{

   217 public:

   218 	IMPORT_C TASN1DecOctetString();

   219 	IMPORT_C HBufC8* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   220 	IMPORT_C HBufC8* DecodeDERL(const TASN1DecGeneric& aSource);

   221 protected:

   222 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   223 	};

   224 

   225 class TASN1DecNumericString

   226 	{

   227 public:

   228 	IMPORT_C TASN1DecNumericString();

   229 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   230 protected:

   231 	/** @internalComponent */

   232 	TInt CheckValid(const TDesC8& aSource);

   233 private:

   234 	HBufC* DecodeContentsL(const TDesC8& aSource);

   235 	};

   236 

   237 class TASN1DecVideotexString

   238 	{

   239 public:

   240 	IMPORT_C TASN1DecVideotexString();

   241 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   242 protected:

   243 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   244 private:

   245 	HBufC* DecodeContentsL(const TDesC8& aSource);

   246 	};

   247 

   248 class TASN1DecPrintableString

   249 	{

   250 public:

   251 	IMPORT_C TASN1DecPrintableString();

   252 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   253 	IMPORT_C HBufC* DecodeDERL(const TASN1DecGeneric& aSource);

   254 protected:

   255 	/** @internalComponent */

   256 	TInt CheckValid(const TDesC8& aSource);

   257 private:

   258 	HBufC* DecodeContentsL(const TDesC8& aSource);

   259 	};

   260 

   261 /**

   262  * Class used for decoding Teletex strings.

   263  * The TeletexString type is not fully supported by this library.

   264  * Instead the decode methods perform a direct conversion from 8 to 16bits by adding 

   265  * null characters in the second byte of each character. This will work as expected 

   266  * for cases where the string contains ASCII data.

   267  * As this is non-destructive, the original data can be retrieved by performing 

   268  * a Copy to an 8-bit descriptor.

   269  */

   270 class TASN1DecTeletexString

   271 	{

   272 public:

   273 	IMPORT_C TASN1DecTeletexString();

   274 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   275 	IMPORT_C HBufC* DecodeDERL(const TASN1DecGeneric& Source);

   276 protected:

   277 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   278 private:

   279 	HBufC* DecodeContentsL(const TDesC8& aSource);

   280 	};

   281 

   282 /**

   283 Class used for decoding ASN.1 BMP strings.

   284  */

   285 class TASN1DecBMPString

   286 	{

   287 public:

   288 	IMPORT_C TASN1DecBMPString();

   289 	IMPORT_C HBufC* DecodeDERL(const TDesC8& aSource,TInt& aPos);

   290 	IMPORT_C HBufC* DecodeDERL(const TASN1DecGeneric& aSource);

   291 protected:

   292 	IMPORT_C TInt CheckValid(const TDesC8& aSource);

   293 private:

   294 	HBufC* DecodeContentsL(const TDesC8& aSource);

   295 	};

   296 

   297 class TASN1DecSequence

   298 	{

   299 public:

   300 	IMPORT_C TASN1DecSequence();

   301 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* DecodeDERLC(const TDesC8& aSource,TInt& aPos);

   302 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* DecodeDERLC(const TASN1DecGeneric& aSource);

   303 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* DecodeDERLC(const TDesC8& aSource,TInt& aPos, TInt aMin, TInt aMax);

   304 	IMPORT_C CArrayPtrFlat<TASN1DecGeneric>* DecodeDERLC(const TASN1DecGeneric& aSource, TInt aMin, TInt aMax);

   305 protected:

   306 	/** @internalComponent */

   307 	void DecodeContentsL(const TDesC8& aSource, CArrayPtrFlat<TASN1DecGeneric>& aDest);

   308 	/** @internalComponent */

   309 	static void CleanupSequence(TAny* aArray);

   310 	};

   311 

   312 #endif
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