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1 /* |
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2 * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: DRM Utility |
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15 * |
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16 */ |
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17 |
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18 |
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19 // INCLUDE FILES |
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20 #include <Oma2Dcf.h> |
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21 #include <drmagents.h> |
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22 #include <drmutility.h> |
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23 #include <centralrepository.h> |
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24 #include <UTF.h> |
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25 |
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26 #include "Oma1Dcf.h" |
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27 |
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28 #include "DrmUtilityInternalcrkeys.h" // Cenrep extension for OmaBased |
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29 |
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30 // CONSTANTS |
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31 _LIT8( KASFHeaderObject, "75B22630668E11CFA6D900AA0062CE6C" ); |
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32 _LIT8( KWrmHeader, "W\0R\0M\0H\0E\0A\0D\0E\0R\0" ); |
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33 |
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34 const TInt KMinContentLength( 16 ); |
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35 const TInt KOma2EncryptionFieldOffset( 8 ); |
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36 const TInt KOmaHeaderLength( 512 ); |
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37 // This constant is for OMA1 case in which a buffer of 35-40 |
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38 // bytes is needed to recognize the mime type. |
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39 const TInt KMinContentLengthOma1Based( 40 ); |
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40 const TInt KWMHeaderObjectLength( 8 ); |
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41 const TInt KWMTopLevelHeaderObjectLength( 30 ); |
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42 const TInt KMaxWMHeaderLength( ( KMaxTInt32 / 2 ) - 1 ); |
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43 |
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44 const TInt KCenRepDataLength( 50 ); |
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45 |
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46 // ============================ LOCAL FUNCTIONS ================================ |
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47 |
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48 // ----------------------------------------------------------------------------- |
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49 // FormatGUID |
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50 // ----------------------------------------------------------------------------- |
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51 // |
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52 LOCAL_C void FormatGUID( TDes8 &aGUID ) |
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53 { |
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54 TBuf8<16> copyGUID( aGUID ); |
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55 TInt i( 0 ); |
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56 for ( i = 0; i < 4; i++ ) |
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57 { |
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58 copyGUID[i] = aGUID[3-i]; |
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59 } |
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60 for ( i = 4; i < 6; i++ ) |
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61 { |
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62 copyGUID[i] = aGUID[9 - i]; |
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63 } |
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64 for ( i = 6; i < 8; i++ ) |
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65 { |
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66 copyGUID[i] = aGUID[13 - i]; |
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67 } |
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68 for ( i = 8; i < 16 ; i++) |
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69 { |
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70 copyGUID[i] = aGUID[i]; |
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71 } |
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72 aGUID.Delete( 0, 32 ); |
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73 for ( i = 0; i < 16; i++ ) |
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74 { |
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75 aGUID.AppendNumFixedWidthUC( copyGUID[i], EHex, 2 ); |
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76 } |
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77 } |
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78 |
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79 // ----------------------------------------------------------------------------- |
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80 // ConvertToInt64 |
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81 // ----------------------------------------------------------------------------- |
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82 // |
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83 LOCAL_C TInt64 ConvertToInt64( TDesC8& aDes ) |
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84 { |
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85 TInt64 num( 0 ); |
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86 TInt i( 0 ); |
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87 for ( i = 7 ; i >= 0; i-- ) |
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88 { |
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89 num <<= 8; |
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90 num |= aDes[i]; |
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91 } |
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92 return num; |
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93 } |
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94 |
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95 // ============================ MEMBER FUNCTIONS =============================== |
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96 |
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97 // ----------------------------------------------------------------------------- |
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98 // Default constructor |
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99 // ----------------------------------------------------------------------------- |
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100 // |
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101 DRM::CDrmUtility::CDrmUtility() |
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102 { |
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103 } |
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104 |
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105 // ----------------------------------------------------------------------------- |
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106 // Destructor |
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107 // ----------------------------------------------------------------------------- |
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108 // |
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109 DRM::CDrmUtility::~CDrmUtility() |
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110 { |
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111 delete iOmaBasedAgentName; |
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112 delete iOmaBasedMimeType; |
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113 } |
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114 |
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115 // ----------------------------------------------------------------------------- |
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116 // CDrmUtility::NewLC |
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117 // First phase constructor |
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118 // ----------------------------------------------------------------------------- |
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119 // |
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120 EXPORT_C DRM::CDrmUtility* DRM::CDrmUtility::NewLC() |
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121 { |
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122 DRM::CDrmUtility* self( new( ELeave ) CDrmUtility ); |
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123 CleanupStack::PushL( self ); |
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124 self->ConstructL(); |
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125 return self; |
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126 } |
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127 |
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128 // ----------------------------------------------------------------------------- |
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129 // CDrmUtility::NewL |
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130 // First phase constructor |
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131 // ----------------------------------------------------------------------------- |
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132 // |
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133 EXPORT_C DRM::CDrmUtility* DRM::CDrmUtility::NewL() |
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134 { |
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135 DRM::CDrmUtility* self( NewLC() ); |
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136 CleanupStack::Pop(); |
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137 return self; |
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138 } |
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139 |
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140 void DRM::CDrmUtility::ConstructL() |
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141 { |
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142 TInt err( KErrNone ); |
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143 |
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144 TRAP(err, FetchOmaBasedInfoL() ); |
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145 if( err) |
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146 { |
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147 if( iOmaBasedAgentName ) |
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148 { |
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149 delete iOmaBasedAgentName; |
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150 } |
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151 iOmaBasedAgentName = NULL; |
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152 if( iOmaBasedMimeType ) |
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153 { |
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154 delete iOmaBasedMimeType; |
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155 } |
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156 iOmaBasedMimeType = NULL; |
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157 } |
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158 } |
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159 |
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160 // ----------------------------------------------------------------------------- |
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161 // CDrmUtility::FetchOmaBasedInfoL |
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162 // ----------------------------------------------------------------------------- |
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163 // |
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164 void DRM::CDrmUtility::FetchOmaBasedInfoL() |
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165 { |
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166 TInt err = KErrNone; |
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167 CRepository* repository( NULL ); |
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168 RBuf bOmaBasedAgentName; |
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169 RBuf bOmaBasedMimeType; |
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170 |
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171 CleanupClosePushL(bOmaBasedAgentName); |
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172 CleanupClosePushL(bOmaBasedMimeType); |
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173 bOmaBasedAgentName.CreateL( KCenRepDataLength ); |
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174 bOmaBasedMimeType.CreateL( KCenRepDataLength ); |
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175 |
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176 TRAP( err, repository = CRepository::NewL( KCRUidOmaBased ) ); |
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177 if ( !err ) |
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178 { |
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179 CleanupStack::PushL( repository ); |
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180 |
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181 err = repository->Get( KDrmOmaBasedName, bOmaBasedAgentName ); |
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182 if( !err ) |
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183 { |
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184 iOmaBasedAgentName = bOmaBasedAgentName.AllocL(); |
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185 } |
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186 |
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187 err = repository->Get( KOmaBasedMimeType, bOmaBasedMimeType ); |
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188 if( !err ) |
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189 { |
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190 iOmaBasedMimeType = CnvUtfConverter::ConvertFromUnicodeToUtf8L( bOmaBasedMimeType ); |
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191 } |
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192 CleanupStack::PopAndDestroy( repository ); |
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193 } |
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194 |
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195 CleanupStack::PopAndDestroy(2); |
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196 |
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197 User::LeaveIfError( err ); |
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198 } |
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199 |
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200 |
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201 // ----------------------------------------------------------------------------- |
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202 // CDrmUtility::GetDrmInfoL |
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203 // ----------------------------------------------------------------------------- |
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204 // |
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205 EXPORT_C TBool DRM::CDrmUtility::GetDrmInfoL( |
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206 RFile& aFileHandle, |
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207 TPtrC& aAgent, |
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208 DRM::TDrmProtectionStatus& aProtected ) const |
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209 { |
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210 TInt r( KErrNone ); |
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211 HBufC8* buffer( NULL ); |
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212 TInt pos( 0 ); |
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213 RFile file; |
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214 TBuf8< 32 > header; |
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215 TInt64 headerSize( 0 ); |
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216 TBool isDrmFile( EFalse ); |
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217 TPtr8 headerPtr( NULL, 0 ); |
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218 |
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219 aProtected = DRM::EUUnprotected; |
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220 aAgent.Set( KNullDesC ); |
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221 |
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222 CheckFileHandleL( aFileHandle ); |
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223 User::LeaveIfError( file.Duplicate( aFileHandle ) ); |
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224 CleanupClosePushL( file ); |
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225 |
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226 User::LeaveIfError( file.Seek( ESeekStart, pos ) ); |
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227 |
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228 // Check if the file is an ASF file |
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229 // To be Checked on runtime wether WM DRM is supporeted or not |
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230 User::LeaveIfError( file.Read( 0, header, KMinContentLength ) ); |
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231 if ( header.Length() < KMinContentLength ) |
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232 { |
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233 User::Leave( KErrArgument ); |
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234 } |
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235 |
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236 FormatGUID( header ); |
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237 |
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238 if ( header == KASFHeaderObject ) |
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239 { |
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240 // It's ASF, check still whether it's WM DRM protected or not |
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241 file.Read( header, KWMHeaderObjectLength ); |
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242 headerSize = ConvertToInt64( header ); |
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243 if( headerSize <= KWMTopLevelHeaderObjectLength || |
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244 headerSize > KMaxWMHeaderLength ) |
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245 { |
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246 User::Leave( KErrArgument ); |
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247 } |
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248 buffer = HBufC8::NewLC( headerSize ); |
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249 |
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250 headerPtr.Set( buffer->Des() ); |
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251 User::LeaveIfError( file.Read( headerPtr, |
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252 headerSize - ( KMinContentLength + KWMHeaderObjectLength ) ) ); |
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253 |
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254 r = headerPtr.Find( KWrmHeader ); |
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255 if ( r == KErrNotFound ) |
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256 { |
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257 aProtected = DRM::EUUnprotected; |
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258 } |
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259 else |
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260 { |
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261 isDrmFile = ETrue; |
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262 aProtected = DRM::EUProtected; |
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263 aAgent.Set( DRM::KDrmWMAgentName ); |
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264 } |
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265 CleanupStack::PopAndDestroy( buffer ); // buffer |
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266 } |
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267 else |
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268 { |
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269 // Check whether it's OMA DRM protected or not |
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270 buffer = HBufC8::NewLC( KOmaHeaderLength ); |
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271 |
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272 headerPtr.Set( buffer->Des() ); |
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273 User::LeaveIfError( file.Read( 0, headerPtr )); |
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274 |
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275 if ( COma1Dcf::IsValidDcf( headerPtr ) ) |
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276 { |
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277 isDrmFile = ETrue; |
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278 aProtected = DRM::EUProtected; |
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279 aAgent.Set( DRM::KDrmOmaAgentName ); |
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280 } |
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281 else if ( COma2Dcf::IsValidDcf( headerPtr ) ) |
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282 { |
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283 isDrmFile = ETrue; |
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284 _LIT8( KCommonHeadersBox, "ohdr" ); |
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285 pos = headerPtr.Find( KCommonHeadersBox ); |
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286 |
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287 // If no box can be found or if there isn't enough data |
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288 // set protection as unknown |
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289 if( pos == KErrNotFound || |
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290 headerPtr.Length() < pos + KOma2EncryptionFieldOffset ) |
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291 { |
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292 aProtected = DRM::EUUnknown; |
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293 } |
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294 // If encryption field is 0, then content isn't protected |
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295 else if ( !headerPtr[pos + KOma2EncryptionFieldOffset] ) |
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296 { |
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297 aProtected = DRM::EUUnprotected; |
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298 } |
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299 else |
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300 { |
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301 aProtected = DRM::EUProtected; |
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302 } |
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303 aAgent.Set( DRM::KDrmOmaAgentName ); |
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304 } |
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305 else if ( (buffer->Des())[0] == 1) |
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306 { |
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307 // set the mimetype from the buffer which is in the beginning |
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308 // starting from byte 3 with the length specified at position 2 |
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309 TPtrC8 mimeType( buffer->Des().Mid(3, (buffer->Des())[1]) ); |
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310 if( !mimeType.CompareF( *iOmaBasedMimeType ) ) |
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311 { |
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312 aAgent.Set( *DRM::CDrmUtility::iOmaBasedAgentName ); |
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313 isDrmFile = ETrue; |
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314 } |
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315 } |
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316 CleanupStack::PopAndDestroy( buffer ); |
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317 } |
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318 CleanupStack::PopAndDestroy( &file ); // file |
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319 return isDrmFile; |
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320 } |
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321 |
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322 // ----------------------------------------------------------------------------- |
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323 // CDrmUtility::GetDrmInfoL |
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324 // ----------------------------------------------------------------------------- |
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325 // |
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326 EXPORT_C TBool DRM::CDrmUtility::GetDrmInfoL( |
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327 const TDesC8& aContent, |
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328 TPtrC& aAgent, |
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329 DRM::TDrmProtectionStatus& aProtected ) const |
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330 { |
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331 TInt r( KErrNone ); |
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332 RFile file; |
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333 TPtr8 asfPtr( NULL, 0 ); |
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334 TBuf8< 32 > asfGuidHex; |
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335 TBool isDrmFile( EFalse ); |
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336 |
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337 aProtected = DRM::EUUnprotected; |
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338 aAgent.Set( KNullDesC ); |
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339 |
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340 if ( aContent.Length() < KMinContentLength ) |
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341 { |
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342 User::Leave( KErrArgument ); |
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343 } |
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344 |
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345 // Check if the file is an ASF file |
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346 asfPtr.Set( |
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347 const_cast<TUint8*>( asfGuidHex.Ptr() ), 0, KMinContentLength * 2 ); |
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348 asfPtr.Copy( aContent.Left( KMinContentLength ) ); |
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349 FormatGUID( asfPtr ); |
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350 |
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351 if ( asfPtr == KASFHeaderObject ) |
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352 { |
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353 // It's ASF, check still whether it's WM DRM protected or not |
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354 r = aContent.Find( KWrmHeader ); |
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355 if ( r == KErrNotFound ) |
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356 { |
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357 aProtected = DRM::EUUnprotected; |
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358 } |
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359 else |
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360 { |
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361 isDrmFile = ETrue; |
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362 aProtected = DRM::EUProtected; |
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363 aAgent.Set( DRM::KDrmWMAgentName ); |
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364 } |
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365 } |
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366 else |
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367 { |
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368 // Check whether it's OMA DRM protected or not. |
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369 if ( ( aContent.Length() >= KMinContentLengthOma1Based ) && |
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370 ( COma1Dcf::IsValidDcf( aContent ) ) ) |
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371 { |
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372 isDrmFile = ETrue; |
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373 aProtected = DRM::EUProtected; |
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374 aAgent.Set( DRM::KDrmOmaAgentName ); |
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375 } |
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376 else if ( COma2Dcf::IsValidDcf( aContent ) ) |
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377 { |
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378 isDrmFile = ETrue; |
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379 _LIT8( KCommonHeadersBox, "ohdr" ); |
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380 TInt pos( aContent.Find( KCommonHeadersBox ) ); |
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381 |
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382 // If no box can be found or if there isn't enough data |
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383 // set protection as unknown |
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384 if ( pos == KErrNotFound || |
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385 aContent.Length() < pos + KOma2EncryptionFieldOffset ) |
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386 { |
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387 aProtected = DRM::EUUnknown; |
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388 } |
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389 // If encryption field is 0, then content isn't protected |
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390 else if ( !aContent[pos + KOma2EncryptionFieldOffset] ) |
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391 { |
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392 aProtected = DRM::EUUnprotected; |
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393 } |
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394 else |
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395 { |
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396 aProtected = DRM::EUProtected; |
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397 } |
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398 aAgent.Set( DRM::KDrmOmaAgentName ); |
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399 } |
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400 else if ( (aContent)[0] == 1) |
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401 { |
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402 // set the mimetype from the buffer which is in the beginning |
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403 // starting from byte 3 with the length specified at position 2 |
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404 TPtrC8 mimeType( aContent.Mid(3, (aContent)[1]) ); |
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405 if( !mimeType.CompareF( *iOmaBasedMimeType ) ) |
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406 { |
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407 aAgent.Set( *DRM::CDrmUtility::iOmaBasedAgentName ); |
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408 isDrmFile = ETrue; |
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409 aProtected = DRM::EUProtected; |
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410 } |
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411 } |
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412 } |
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413 return isDrmFile; |
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414 } |
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415 |
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416 // ----------------------------------------------------------------------------- |
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417 // CDrmUtility::IsProtectedL |
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418 // ----------------------------------------------------------------------------- |
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419 // |
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420 EXPORT_C TBool DRM::CDrmUtility::IsProtectedL( RFile& aFileHandle ) const |
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421 { |
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422 DRM::TDrmProtectionStatus protection( DRM::EUUnknown ); |
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423 TPtrC agent( KNullDesC ); |
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424 TBool isDrmFile( EFalse ); |
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425 TBool isProtected( EFalse ); |
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426 |
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427 isDrmFile = GetDrmInfoL( aFileHandle, agent, protection ); |
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428 |
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429 if ( isDrmFile && protection == DRM::EUProtected ) |
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430 { |
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431 isProtected = ETrue; |
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432 } |
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433 return isProtected; |
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434 } |
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435 |
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436 |
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437 // ----------------------------------------------------------------------------- |
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438 // CDrmUtility::IsProtectedL |
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439 // ----------------------------------------------------------------------------- |
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440 // |
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441 EXPORT_C TBool DRM::CDrmUtility::IsProtectedL( const TDesC8& aContent ) const |
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442 { |
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443 DRM::TDrmProtectionStatus protection( DRM::EUUnknown ); |
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444 TPtrC agent( KNullDesC ); |
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445 TBool isDrmFile( EFalse ); |
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446 TBool isProtected( EFalse ); |
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447 |
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448 isDrmFile = GetDrmInfoL( aContent, agent, protection ); |
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449 |
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450 if( isDrmFile && protection == DRM::EUProtected ) |
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451 { |
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452 isProtected = ETrue; |
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453 } |
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454 return isProtected; |
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455 } |
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456 |
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457 |
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458 // ----------------------------------------------------------------------------- |
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459 // CDrmUtility::GetAgentL |
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460 // ----------------------------------------------------------------------------- |
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461 // |
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462 EXPORT_C TBool DRM::CDrmUtility::GetAgentL( |
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463 RFile& aFileHandle, |
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464 TPtrC& aAgent ) const |
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465 { |
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466 DRM::TDrmProtectionStatus protection( DRM::EUUnknown ); |
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467 TBool isDrmFile( EFalse ); |
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468 |
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469 isDrmFile = GetDrmInfoL( aFileHandle, aAgent, protection ); |
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470 |
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471 return isDrmFile; |
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472 } |
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473 |
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474 // ----------------------------------------------------------------------------- |
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475 // CDrmUtility::GetAgentL |
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476 // ----------------------------------------------------------------------------- |
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477 // |
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478 EXPORT_C TBool DRM::CDrmUtility::GetAgentL( |
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479 const TDesC8& aContent, |
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480 TPtrC& aAgent ) const |
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481 { |
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482 DRM::TDrmProtectionStatus protection( DRM::EUUnknown ); |
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483 TBool isDrmFile( EFalse ); |
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484 |
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485 isDrmFile = GetDrmInfoL( aContent, aAgent, protection ); |
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486 |
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487 return isDrmFile; |
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488 } |
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489 |
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490 |
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491 // ----------------------------------------------------------------------------- |
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492 // CDrmUtility::CheckFileHandlerL |
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493 // Checks whether given filehandle is valid if not leaves with KErrArgument |
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494 // (other items were commented in a header). |
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495 // ----------------------------------------------------------------------------- |
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496 // |
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497 EXPORT_C void DRM::CDrmUtility::CheckFileHandleL( RFile& aFileHandle ) const |
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498 { |
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499 if ( !aFileHandle.SubSessionHandle() ) |
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500 { |
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501 User::Leave( KErrBadHandle ); |
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502 } |
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503 } |
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504 |
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505 // End of File |