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1 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // File contains internal classes for Ascii To Base64 converison |
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15 // and vice-versa. |
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16 // |
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17 // |
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18 |
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19 /** |
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20 @file TConvBase64.h |
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21 @internalAll |
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22 @released |
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23 */ |
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24 |
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25 #ifndef __TCONVBASE64_H__ |
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26 #define __TCONVBASE64_H__ |
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27 |
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28 #include <e32base.h> |
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29 |
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30 |
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31 const TInt KMaxB64EncodedCharsPerLine = 60; |
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32 // Could be increased to 75 characters for every encoded line if KDecodeLineLength = 675. |
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33 // 60 was chosen to maintain existing behaviour. |
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34 const TInt8 KImcvLookUpStartOffset = 43; |
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35 const TUint8 KImcvConvEquals = '='; |
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36 const TInt8 AsciiToBase64[80]= |
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37 { |
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38 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, |
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39 57, 58, 59, 60, 61, -1, -1, -1, 64, -1, |
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40 -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, |
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41 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, |
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42 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, |
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43 -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, |
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44 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, |
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45 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 |
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46 }; |
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47 const TInt8 Base64ToAscii[65]= |
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48 { |
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49 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, |
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50 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, |
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51 85, 86, 87, 88, 89, 90, 97, 98, 99,100, |
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52 101,102,103,104,105,106,107,108,109,110, |
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53 111,112,113,114,115,116,117,118,119,120, |
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54 121,122, 48, 49, 50, 51, 52, 53, 54, 55, |
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55 56, 57, 43, 47, 61 |
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56 }; |
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57 |
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58 /** |
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59 Base64 encoding and decoding class, complaint with RFC-3548. |
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60 @internalAll |
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61 @released |
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62 */ |
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63 class TBase64 |
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64 { |
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65 private: |
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66 /** |
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67 enum base64 coding defines |
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68 */ |
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69 enum |
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70 { |
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71 /** Padding characters */ |
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72 EPadChar = 64 |
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73 }; |
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74 |
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75 /** |
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76 enum for EMaskValues |
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77 */ |
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78 enum EMaskValues |
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79 { |
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80 /** Mask Six bits */ |
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81 ESixBitMask = 0x3F, |
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82 /** Mask Eight bits */ |
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83 EEightBitMask = 0xFF |
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84 }; |
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85 |
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86 /** |
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87 enum for EMaskShiftValues |
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88 */ |
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89 enum EMaskShiftValues |
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90 { |
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91 /** enum for 6 */ |
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92 ESix = 6, |
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93 /** enum for 4 */ |
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94 EFour = 4, |
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95 /** enum for 2 */ |
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96 ETwo = 2, |
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97 /** enum for 0 */ |
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98 EZero = 0 |
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99 }; |
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100 |
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101 public: |
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102 IMPORT_C TBase64(); |
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103 IMPORT_C TInt Encode( const TDesC8& aSrcString, TDes8& rDestString); |
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104 IMPORT_C TBool Decode( const TDesC8& aSrcString, TDes8& rDestString); |
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105 |
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106 private: |
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107 |
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108 TInt iShiftStored; |
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109 TInt iMaskShiftStored; |
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110 }; |
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111 |
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112 #endif // __TCONVBASE64_H__ |