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1 // Copyright (c) 2003-2009 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 // Name : SdpKeyField.h |
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15 // Part of : SDP Codec |
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16 // Version : 1.0 |
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17 // |
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18 |
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19 |
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20 |
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21 #include <uri8.h> |
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22 #include <s32strm.h> |
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23 #include "SdpKeyField.h" |
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24 #include "SdpUtil.h" |
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25 #include "SDPCodec.pan" |
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26 #include "_sdpdefs.h" |
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27 #include "sdpcodecstringconstants.h" |
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28 #include "SdpCodecConstants.h" |
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29 #include "SdpCodecErr.h" |
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30 #include "SdpCodecStringPool.h" |
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31 |
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32 // LOCAL CONSTANTS |
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33 const TText8 KPlusChar = '+'; |
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34 |
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35 // ----------------------------------------------------------------------------- |
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36 // CSdpKeyField::DecodeL |
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37 // Decodes key field from TDesC |
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38 // ----------------------------------------------------------------------------- |
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39 // |
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40 EXPORT_C CSdpKeyField* CSdpKeyField::DecodeL(const TDesC8& aFieldValue) |
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41 { |
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42 CSdpKeyField* obj = DecodeLC(aFieldValue); |
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43 CleanupStack::Pop(); |
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44 return obj; |
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45 } |
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46 |
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47 // ----------------------------------------------------------------------------- |
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48 // CSdpKeyField::DecodeL |
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49 // Decodes key field from TDesC |
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50 // ----------------------------------------------------------------------------- |
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51 // |
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52 EXPORT_C CSdpKeyField* CSdpKeyField::DecodeLC(const TDesC8& aFieldValue) |
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53 { |
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54 CSdpKeyField* obj = new (ELeave) CSdpKeyField(); |
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55 CleanupStack::PushL(obj); |
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56 obj->ConstructL(aFieldValue); |
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57 return obj; |
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58 } |
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59 |
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60 // ----------------------------------------------------------------------------- |
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61 // CSdpKeyField::NewL |
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62 // Two-phased constructor |
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63 // ----------------------------------------------------------------------------- |
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64 // |
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65 EXPORT_C CSdpKeyField* CSdpKeyField::NewL(RStringF aMethod, |
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66 const TDesC8& aEncryptionKey) |
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67 { |
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68 CSdpKeyField* obj = NewLC(aMethod, aEncryptionKey); |
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69 CleanupStack::Pop(); |
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70 return obj; |
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71 } |
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72 |
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73 // ----------------------------------------------------------------------------- |
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74 // CSdpKeyField::NewLC |
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75 // Two-phased constructor |
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76 // ----------------------------------------------------------------------------- |
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77 // |
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78 EXPORT_C CSdpKeyField* CSdpKeyField::NewLC(RStringF aMethod, |
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79 const TDesC8& aEncryptionKey) |
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80 { |
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81 CSdpKeyField* obj = new (ELeave) CSdpKeyField(); |
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82 CleanupStack::PushL(obj); |
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83 obj->ConstructL(aMethod, aEncryptionKey); |
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84 return obj; |
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85 } |
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86 |
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87 // ----------------------------------------------------------------------------- |
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88 // CSdpKeyField::~CSdpKeyField |
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89 // Destructor |
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90 // ----------------------------------------------------------------------------- |
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91 // |
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92 EXPORT_C CSdpKeyField::~CSdpKeyField() |
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93 { |
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94 iMethod.Close(); |
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95 delete iEncryptionKey; |
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96 } |
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97 |
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98 // ----------------------------------------------------------------------------- |
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99 // CSdpKeyField::EncodeL |
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100 // Writes attributes in proper format to the stream |
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101 // ----------------------------------------------------------------------------- |
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102 // |
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103 EXPORT_C void CSdpKeyField::EncodeL(RWriteStream& aStream) const |
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104 { |
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105 __TEST_INVARIANT; |
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106 RStringF header = iStringPool.StringF(SdpCodecStringConstants::EKey, |
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107 SdpCodecStringConstants::Table); |
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108 aStream.WriteL( header.DesC() ); |
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109 |
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110 aStream.WriteL( iMethod.DesC() ); |
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111 if (iMethod != iStringPool.StringF(SdpCodecStringConstants::EMethodPrompt, |
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112 SdpCodecStringConstants::Table)) |
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113 { |
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114 aStream.WriteL( KColonStr ); |
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115 if (iEncryptionKey->Length() > 0) |
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116 { |
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117 aStream.WriteL( *iEncryptionKey ); |
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118 } |
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119 } |
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120 |
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121 aStream.WriteL( KCRLFStr ); |
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122 } |
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123 |
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124 // ----------------------------------------------------------------------------- |
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125 // CSdpKeyField::CloneL |
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126 // Creates an exact copy of the key field |
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127 // ----------------------------------------------------------------------------- |
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128 // |
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129 EXPORT_C CSdpKeyField * CSdpKeyField::CloneL() const |
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130 { |
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131 __TEST_INVARIANT; |
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132 CSdpKeyField* obj = CSdpKeyField::NewL(iMethod, *iEncryptionKey); |
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133 __ASSERT_DEBUG(*this == *obj, User::Panic( KSdpCodecPanicCat, |
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134 KSdpCodecPanicInternal)); |
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135 return obj; |
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136 } |
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137 |
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138 // ----------------------------------------------------------------------------- |
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139 // CSdpKeyField::operator == |
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140 // Checks if two key fields are equal |
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141 // ----------------------------------------------------------------------------- |
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142 // |
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143 EXPORT_C TBool CSdpKeyField::operator == (const CSdpKeyField& aObj) const |
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144 { |
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145 __TEST_INVARIANT; |
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146 return iMethod == aObj.iMethod |
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147 && ((iEncryptionKey == 0 && aObj.iEncryptionKey == 0) |
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148 || (iEncryptionKey != 0 && aObj.iEncryptionKey != 0 |
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149 && aObj.iEncryptionKey->Compare(*iEncryptionKey) == 0)); |
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150 } |
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151 |
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152 // ----------------------------------------------------------------------------- |
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153 // CSdpKeyField::Method |
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154 // Returns method |
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155 // ----------------------------------------------------------------------------- |
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156 // |
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157 EXPORT_C RStringF CSdpKeyField::Method() const |
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158 { |
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159 __TEST_INVARIANT; |
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160 return iMethod; |
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161 } |
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162 |
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163 // ----------------------------------------------------------------------------- |
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164 // CSdpKeyField::EncryptionKey |
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165 // Returns encryption key |
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166 // ----------------------------------------------------------------------------- |
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167 // |
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168 EXPORT_C const TDesC8& CSdpKeyField::EncryptionKey() const |
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169 { |
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170 __TEST_INVARIANT; |
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171 return *iEncryptionKey; |
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172 } |
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173 |
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174 // ----------------------------------------------------------------------------- |
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175 // CSdpKeyField::SetL |
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176 // Sets new values to key method and encryption key |
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177 // ----------------------------------------------------------------------------- |
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178 // |
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179 EXPORT_C void CSdpKeyField::SetL(RStringF aMethod, |
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180 const TDesC8& aEncryptionKey) |
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181 { |
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182 RStringF methodClear = iStringPool.StringF( |
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183 SdpCodecStringConstants::EMethodClear, |
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184 SdpCodecStringConstants::Table ); |
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185 RStringF methodBase64 = iStringPool.StringF( |
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186 SdpCodecStringConstants::EMethodBase64, |
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187 SdpCodecStringConstants::Table ); |
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188 RStringF methodUri = iStringPool.StringF( |
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189 SdpCodecStringConstants::EMethodUri, |
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190 SdpCodecStringConstants::Table ); |
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191 RStringF methodPrompt = iStringPool.StringF( |
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192 SdpCodecStringConstants::EMethodPrompt, |
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193 SdpCodecStringConstants::Table ); |
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194 |
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195 if (aMethod == methodClear) |
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196 { |
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197 SetMethodClearAndKeyL(methodClear, aEncryptionKey); |
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198 } |
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199 else if (aMethod == methodBase64) |
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200 { |
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201 SetMethodBase64AndKeyL(methodBase64, aEncryptionKey); |
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202 } |
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203 else if (aMethod == methodUri) |
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204 { |
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205 SetMethodUriAndKeyL(methodUri, aEncryptionKey); |
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206 } |
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207 else if (aMethod == methodPrompt) |
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208 { |
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209 SetMethodPromptL(methodPrompt, aEncryptionKey); |
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210 } |
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211 else |
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212 { |
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213 User::Leave(KErrSdpCodecKeyField); |
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214 } |
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215 |
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216 __TEST_INVARIANT; |
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217 } |
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218 |
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219 // ----------------------------------------------------------------------------- |
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220 // CSdpKeyField::ExternalizeL |
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221 // Externalizes the object to stream |
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222 // ----------------------------------------------------------------------------- |
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223 // |
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224 void CSdpKeyField::ExternalizeL(RWriteStream& aStream) const |
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225 { |
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226 aStream.WriteUint32L( iMethod.DesC().Length() ); |
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227 aStream.WriteL( iMethod.DesC() ); |
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228 |
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229 aStream.WriteUint32L( iEncryptionKey->Des().Length() ); |
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230 if (iEncryptionKey->Des().Length() > 0) |
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231 { |
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232 aStream.WriteL(iEncryptionKey->Des(), iEncryptionKey->Des().Length()); |
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233 } |
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234 } |
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235 |
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236 // ----------------------------------------------------------------------------- |
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237 // CSdpKeyField::InternalizeL |
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238 // Internalizes the object from stream |
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239 // ----------------------------------------------------------------------------- |
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240 // |
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241 CSdpKeyField* CSdpKeyField::InternalizeL(RReadStream& aStream) |
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242 { |
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243 CSdpKeyField* self = new (ELeave) CSdpKeyField(); |
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244 CleanupStack::PushL(self); |
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245 self->iStringPool = SdpCodecStringPool::StringPoolL(); |
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246 |
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247 self->DoInternalizeL(aStream); |
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248 |
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249 CleanupStack::Pop(); // self |
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250 return self; |
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251 } |
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252 |
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253 // ----------------------------------------------------------------------------- |
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254 // CSdpKeyField::CSdpKeyField |
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255 // Constructor |
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256 // ----------------------------------------------------------------------------- |
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257 // |
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258 CSdpKeyField::CSdpKeyField() |
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259 { |
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260 } |
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261 |
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262 // ----------------------------------------------------------------------------- |
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263 // CSdpKeyField::ConstructL |
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264 // Symbian 2nd phase constructor can leave. |
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265 // ----------------------------------------------------------------------------- |
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266 // |
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267 void CSdpKeyField::ConstructL(const TDesC8& aText) |
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268 { |
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269 iStringPool = SdpCodecStringPool::StringPoolL(); |
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270 RArray <TPtrC8> lines; |
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271 lines = SdpUtil::DivideToLinesL(aText, KErrSdpCodecKeyField); |
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272 CleanupClosePushL(lines); |
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273 |
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274 TLex8 lexer(lines[0]); |
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275 RArray<TPtrC8> keyArray = GetElementsFromLineL(lexer); |
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276 CleanupClosePushL(keyArray); |
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277 const TDesC8& keyName = iStringPool.StringF(SdpCodecStringConstants::EKey, |
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278 SdpCodecStringConstants::Table).DesC(); |
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279 |
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280 __ASSERT_ALWAYS(lines.Count() == 1 |
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281 && keyArray.Count() >= 2 && keyArray.Count() <= 3 |
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282 && keyArray[0].Find(keyName) != KErrNotFound, |
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283 User::Leave(KErrSdpCodecKeyField)); |
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284 |
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285 RStringF method = iStringPool.OpenFStringL(keyArray[1]); |
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286 CleanupClosePushL(method); |
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287 |
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288 if (keyArray.Count() == 3) |
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289 { |
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290 SetL(method, keyArray[2]); |
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291 } |
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292 else |
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293 { |
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294 SetL(method, KNullDesC8); |
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295 } |
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296 CleanupStack::PopAndDestroy(3); // method, lines, keyArray |
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297 __TEST_INVARIANT; |
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298 } |
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299 |
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300 // ----------------------------------------------------------------------------- |
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301 // CSdpKeyField::ConstructL |
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302 // Symbian 2nd phase constructor can leave. |
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303 // ----------------------------------------------------------------------------- |
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304 // |
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305 void CSdpKeyField::ConstructL(RStringF aMethod, const TDesC8& aEncryptionKey) |
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306 { |
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307 iStringPool = SdpCodecStringPool::StringPoolL(); |
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308 SetL(aMethod, aEncryptionKey); |
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309 |
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310 __TEST_INVARIANT; |
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311 } |
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312 |
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313 // ----------------------------------------------------------------------------- |
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314 // CSdpKeyField::DoInternalizeL |
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315 // Internalizes the object members from stream |
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316 // ----------------------------------------------------------------------------- |
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317 // |
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318 void CSdpKeyField::DoInternalizeL(RReadStream& aStream) |
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319 { |
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320 // <method> |
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321 TUint32 length = aStream.ReadUint32L(); |
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322 HBufC8* method = HBufC8::NewLC(length); |
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323 TPtr8 ptr(method->Des()); |
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324 aStream.ReadL(ptr, length); |
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325 |
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326 RStringF methodStr = iStringPool.OpenFStringL(*method); |
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327 CleanupStack::PopAndDestroy(); // method |
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328 CleanupClosePushL(methodStr); |
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329 |
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330 length = aStream.ReadUint32L(); |
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331 if (length > 0) |
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332 { |
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333 HBufC8* key = HBufC8::NewLC(length); |
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334 ptr.Set(key->Des()); |
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335 aStream.ReadL(ptr, length); |
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336 |
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337 SetL(methodStr, *key); |
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338 CleanupStack::PopAndDestroy(); //key |
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339 } |
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340 else |
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341 { |
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342 SetL(methodStr, KNullDesC8); |
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343 } |
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344 CleanupStack::PopAndDestroy(); // methodStr |
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345 } |
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346 |
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347 // ----------------------------------------------------------------------------- |
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348 // CSdpKeyField::SetMethodAndKeyL |
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349 // Sets new values to key method and encryption key |
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350 // ----------------------------------------------------------------------------- |
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351 // |
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352 void CSdpKeyField::SetMethodAndKeyL(RStringF aMethod, |
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353 const TDesC8& aEncryptionKey, |
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354 TBool aAllowEmptyKeyValue) |
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355 { |
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356 HBufC8* tempKey = aEncryptionKey.AllocL(); |
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357 tempKey->Des().Trim(); |
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358 if (tempKey->Length() == 0 && !aAllowEmptyKeyValue) |
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359 { |
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360 delete tempKey; |
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361 User::Leave(KErrSdpCodecKeyField); |
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362 } |
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363 iMethod.Close(); |
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364 iMethod = aMethod.Copy(); |
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365 delete iEncryptionKey; |
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366 iEncryptionKey = tempKey; |
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367 } |
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368 |
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369 // ----------------------------------------------------------------------------- |
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370 // CSdpKeyField::SetMethodClearAndKeyL |
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371 // Sets key method to clear and new encryption key |
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372 // ----------------------------------------------------------------------------- |
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373 // |
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374 void CSdpKeyField::SetMethodClearAndKeyL(RStringF aMethod, |
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375 const TDesC8& aEncryptionKey) |
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376 { |
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377 __ASSERT_ALWAYS(SdpUtil::IsByteString(aEncryptionKey), |
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378 User::Leave(KErrSdpCodecKeyField)); |
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379 SetMethodAndKeyL(aMethod, aEncryptionKey, EFalse); |
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380 } |
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381 |
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382 // ----------------------------------------------------------------------------- |
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383 // CSdpKeyField::SetMethodBase64AndKeyL |
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384 // Sets key method to Base64 and new encryption key |
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385 // ----------------------------------------------------------------------------- |
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386 // |
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387 void CSdpKeyField::SetMethodBase64AndKeyL(RStringF aMethod, |
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388 const TDesC8& aText) |
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389 { |
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390 __ASSERT_ALWAYS(aText.Length() > 0, User::Leave(KErrSdpCodecKeyField)); |
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391 |
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392 for (TInt i = 0; i < aText.Length(); i++) |
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393 { |
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394 if ( !( ( aText[i] >= 'a' && aText[i] <= 'z' ) || |
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395 ( aText[i] >= 'A' && aText[i] <= 'Z' ) || |
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396 ( aText[i] >= '0' && aText[i] <= '9' ) || |
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397 ( aText[i] == KPlusChar ) || |
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398 ( aText[i] == KSlashChar ) || |
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399 ( aText[i] == KEqualChar ) ) ) |
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400 { |
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401 User::Leave(KErrSdpCodecKeyField); |
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402 } |
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403 } |
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404 SetMethodAndKeyL(aMethod, aText, EFalse); |
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405 } |
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406 |
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407 // ----------------------------------------------------------------------------- |
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408 // CSdpKeyField::SetMethodUriAndKeyL |
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409 // Sets key method to uri and new encryption key |
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410 // ----------------------------------------------------------------------------- |
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411 // |
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412 void CSdpKeyField::SetMethodUriAndKeyL(RStringF aMethod, const TDesC8& aText) |
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413 { |
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414 TUriParser8 parser; |
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415 User::LeaveIfError(parser.Parse(aText)); |
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416 SetMethodAndKeyL(aMethod, aText, EFalse); |
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417 } |
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418 |
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419 // ----------------------------------------------------------------------------- |
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420 // CSdpKeyField::SetMethodPromptL |
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421 // Sets key method to Prompt and new encryption key |
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422 // ----------------------------------------------------------------------------- |
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423 // |
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424 void CSdpKeyField::SetMethodPromptL(RStringF aMethod, const TDesC8& aText) |
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425 { |
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426 __ASSERT_ALWAYS(aText.Length() == 0, User::Leave(KErrSdpCodecKeyField)); |
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427 SetMethodAndKeyL(aMethod, aText, ETrue); |
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428 } |
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429 |
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430 // ----------------------------------------------------------------------------- |
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431 // CSdpKeyField::GetElementsFromLineL |
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432 // Gets all the elements from a single line |
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433 // ----------------------------------------------------------------------------- |
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434 // |
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435 RArray<TPtrC8> CSdpKeyField::GetElementsFromLineL( TLex8& aLexer) |
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436 { |
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437 RArray<TPtrC8> lineArray; |
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438 CleanupClosePushL(lineArray); |
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439 |
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440 aLexer.Mark(); |
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441 for (TChar curChar(KColonChar); curChar != KEqualChar;) |
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442 { |
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443 curChar = aLexer.Peek(); |
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444 if (curChar == KEofChar || curChar == KLFChar || |
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445 curChar == KCRChar) |
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446 { |
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447 User::Leave(KErrSdpCodecKeyField); |
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448 } |
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449 aLexer.Inc(); |
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450 } |
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451 User::LeaveIfError(lineArray.Append(aLexer.MarkedToken())); |
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452 |
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453 TBool colonFound = EFalse; |
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454 TBool eofcFound = EFalse; |
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455 while (!eofcFound) |
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456 { |
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457 aLexer.Mark(); |
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458 while ((aLexer.Peek() != KColonChar || colonFound) && |
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459 aLexer.Peek() != KCRChar && |
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460 aLexer.Peek() != KLFChar && |
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461 aLexer.Peek() != KEofChar) |
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462 { |
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463 aLexer.Inc(); |
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464 } |
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465 |
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466 if (aLexer.MarkedToken().Length() > 0) |
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467 { |
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468 User::LeaveIfError(lineArray.Append(aLexer.MarkedToken())); |
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469 } |
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470 else |
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471 { |
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472 User::Leave(KErrSdpCodecKeyField); |
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473 } |
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474 |
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475 if (aLexer.Peek() == KColonChar) |
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476 { |
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477 colonFound = ETrue; |
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478 } |
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479 |
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480 if (aLexer.Peek() == KCRChar) |
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481 { |
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482 aLexer.Inc(); |
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483 } |
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484 if (aLexer.Peek() == KLFChar) |
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485 { |
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486 aLexer.Inc(); |
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487 if (aLexer.Peek() == KEofChar) |
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488 { |
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489 eofcFound = ETrue; |
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490 } |
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491 } |
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492 else |
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493 { |
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494 aLexer.Inc(); |
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495 } |
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496 } |
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497 |
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498 CleanupStack::Pop(); |
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499 return lineArray; |
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500 } |
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501 |
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502 void CSdpKeyField::__DbgTestInvariant() const |
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503 { |
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504 RStringF methodClear = iStringPool.StringF( |
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505 SdpCodecStringConstants::EMethodClear, |
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506 SdpCodecStringConstants::Table ); |
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507 RStringF methodBase64 = iStringPool.StringF( |
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508 SdpCodecStringConstants::EMethodBase64, |
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509 SdpCodecStringConstants::Table ); |
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510 RStringF methodUri = iStringPool.StringF( |
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511 SdpCodecStringConstants::EMethodUri, |
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512 SdpCodecStringConstants::Table ); |
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513 RStringF methodPrompt = iStringPool.StringF( |
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514 SdpCodecStringConstants::EMethodPrompt, |
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515 SdpCodecStringConstants::Table ); |
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516 |
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517 TBool invariant = (iMethod == methodPrompt |
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518 && (iEncryptionKey != 0 && (iEncryptionKey->Length() == 0)) ) |
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519 || ((iMethod == methodClear || iMethod == methodBase64 |
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520 || iMethod == methodUri) |
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521 && (iEncryptionKey != 0 && (iEncryptionKey->Length() != 0)) ); |
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522 |
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523 if (!invariant) |
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524 User::Invariant(); |
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525 } |