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1 /* |
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2 * Copyright (c) 2008 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: WM DRM specific methods for DRM Rights Manager |
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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 <e32std.h> |
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20 #include <DRMRights.h> |
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21 |
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22 #include "drmclockclient.h" |
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23 #include "drmutilitywmdrmutilities.h" |
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24 #include "drmrights.h" |
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25 |
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26 // CONSTANTS |
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27 _LIT( KLicenseType, "licensetype=" ); |
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28 _LIT( KTime, "time" ); |
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29 _LIT( KCount, "count" ); |
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30 _LIT( KDuration, "duration" ); |
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31 _LIT( KTimeCount, "time-count" ); |
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32 _LIT( KUnlimited, "unlimited" ); |
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33 |
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34 _LIT( KDurationLeft, "duration=" ); |
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35 _LIT( KCountLeft, "countleft=" ); |
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36 _LIT( KStartTime, "starttime=" ); |
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37 _LIT( KEndTime, "endtime=" ); |
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38 |
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39 const TUint8 KFoundStartTime = 0x01; |
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40 const TUint8 KFoundEndTime = 0x02; |
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41 |
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42 // masks for constraint existence |
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43 const TInt KWmDrmConstraintCount( 1 ); |
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44 const TInt KWmDrmConstraintStartTime ( 2 ); |
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45 const TInt KWmDrmConstraintEndTime( 4 ); |
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46 const TInt KWmDrmConstraintDuration( 8 ); |
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47 |
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48 #ifdef _DEBUG |
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49 // debug panic |
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50 _LIT( KWmDrmUtilitiesDebugPanicMessage, "WmDrmUtilitiesDebugPanic" ); |
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51 const TInt KWmDrmUtilitiesDebugPanicCode( 2 ); |
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52 #endif |
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53 |
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54 // LOCAL FUNCTION PROTOTYPES |
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55 // Parses the given lexicographic representation. Return value indicates |
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56 // whether the given end character of the searched substring was found or not. |
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57 // Special handling is applied for certain separators (e.g. ';', '-') |
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58 LOCAL_C TBool ParseString( TChar aChar, TLex& aLex, TPtrC16& aPtr ); |
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59 |
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60 // ================= MEMBER FUNCTIONS ======================= |
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61 |
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62 LOCAL_C TBool ParseString( TChar aChar, TLex& aLex, TPtrC16& aPtr ) |
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63 { |
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64 TBool found( EFalse ); |
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65 aLex.Mark(); |
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66 |
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67 while ( !aLex.Eos() && found == EFalse ) |
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68 { |
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69 TChar ch; |
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70 ch = aLex.Get(); |
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71 if ( ch == aChar ) |
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72 { |
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73 if ( ch == ';' || ch == '-' || ch == ':' || ch == 'T' || ch == 'Z' ) |
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74 { |
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75 // Remove char from the token string and read it from the lex. |
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76 aLex.UnGet(); |
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77 aPtr.Set( aLex.MarkedToken() ); |
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78 aLex.Get(); |
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79 } |
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80 else |
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81 { |
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82 aPtr.Set( aLex.MarkedToken() ); |
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83 } |
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84 found = ETrue; |
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85 } |
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86 } |
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87 return found; |
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88 } |
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89 |
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90 // ---------------------------------------------------------------------------- |
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91 // DrmUtilityWmDrmUtilities::ParseWmDrmTimeRightsL |
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92 // ---------------------------------------------------------------------------- |
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93 EXPORT_C void DrmUtilityWmDrmUtilities::ParseWmDrmTimeRightsL( TLex& aLex, |
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94 TTime& aStartTime, TTime& aEndTime ) |
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95 { |
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96 TPtrC16 token( NULL, 0 ); |
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97 TUint8 times( 0 ); |
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98 TTime localTime( Time::NullTTime() ); |
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99 TTime universalTime( Time::NullTTime() ); |
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100 TTimeIntervalSeconds timeDifference( 0 ); // local time - secure time |
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101 TInt years, months, days, hours, minutes, secs; |
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102 TChar ch; |
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103 TLex lex; |
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104 TTime drmTime; |
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105 TInt timeZone; |
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106 |
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107 DRMClock::ESecurityLevel secLevel = DRMClock::KInsecure; |
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108 |
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109 // The format of the start and end time strings is the following: |
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110 // "starttime=yy-mm-ddThh:mins:ssZ |
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111 // "endtime=yy-mm-ddThh:mins:ssZ |
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112 // where yy = years, mm = months, dd = days, hh = hours, |
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113 // mins = minutes and ss = seconds, "-", "T", ":" and "Z" |
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114 // are separators. |
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115 while ( !aLex.Eos() && ( aLex.Peek() != 0 ) ) |
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116 { |
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117 // The next string should be start time, end time or then |
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118 // it does not exist. |
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119 ParseString( '=', aLex, token ); |
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120 |
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121 if ( token.CompareF( KStartTime ) == 0 ) |
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122 { |
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123 times |= KFoundStartTime; |
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124 } |
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125 else if ( token.CompareF( KEndTime ) == 0 ) |
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126 { |
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127 times |= KFoundEndTime; |
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128 } |
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129 else |
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130 { |
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131 // No start time ("starttime=") or end time ("endtime=") |
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132 // string was found -> return |
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133 return; |
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134 } |
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135 |
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136 if ( ( times & KFoundStartTime ) || ( times & KFoundEndTime ) ) |
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137 { |
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138 // Search for years, months, days, hours, minutes, secs |
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139 if ( ParseString( '-', aLex, token ) ) |
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140 { |
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141 TLex lexYear( token ); |
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142 User::LeaveIfError( lexYear.Val( years ) ); |
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143 } |
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144 else |
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145 { |
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146 User::Leave( KErrNotFound ); |
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147 } |
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148 |
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149 if ( ParseString( '-', aLex, token ) ) |
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150 { |
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151 TLex lexMonths( token ); |
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152 User::LeaveIfError( lexMonths.Val( months ) ); |
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153 } |
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154 else |
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155 { |
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156 User::Leave( KErrNotFound ); |
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157 } |
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158 |
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159 if ( ParseString( 'T', aLex, token ) ) |
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160 { |
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161 TLex lexDays( token ); |
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162 User::LeaveIfError( lexDays.Val( days ) ); |
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163 } |
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164 else |
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165 { |
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166 User::Leave( KErrNotFound ); |
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167 } |
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168 |
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169 if( ParseString( ':', aLex, token ) ) |
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170 { |
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171 TLex lexHours( token ); |
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172 User::LeaveIfError( lexHours.Val( hours ) ); |
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173 } |
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174 else |
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175 { |
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176 User::Leave( KErrNotFound ); |
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177 } |
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178 |
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179 if ( ParseString( ':', aLex, token ) ) |
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180 { |
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181 TLex lexMinutes( token ); |
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182 User::LeaveIfError( lexMinutes.Val( minutes ) ); |
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183 } |
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184 else |
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185 { |
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186 User::Leave( KErrNotFound ); |
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187 } |
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188 |
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189 if( ParseString( 'Z', aLex, token ) ) |
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190 { |
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191 TLex lexSeconds( token ); |
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192 User::LeaveIfError( lexSeconds.Val( secs ) ); |
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193 } |
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194 else |
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195 { |
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196 User::Leave( KErrNotFound ); |
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197 } |
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198 |
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199 ParseString( ';', aLex, token ); |
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200 token.Set( NULL, 0 ); |
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201 |
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202 TDateTime date( years, (TMonth)( months - 1 ), days - 1, hours, |
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203 minutes, secs, 0 ); |
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204 TTime dateTime( date ); |
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205 |
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206 // Get secure time from DRM clock |
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207 RDRMClockClient client; |
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208 |
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209 User::LeaveIfError( client.Connect() ); |
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210 client.GetSecureTime( drmTime, timeZone, secLevel ); |
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211 client.Close(); |
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212 |
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213 localTime.HomeTime(); |
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214 |
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215 if ( secLevel == DRMClock::KSecure ) |
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216 { |
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217 // Calculate the difference between local time and secure time |
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218 localTime.SecondsFrom( drmTime, timeDifference ); |
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219 } |
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220 else |
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221 { |
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222 // Calculate the difference between local and universal time |
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223 universalTime.UniversalTime(); |
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224 localTime.SecondsFrom( universalTime, timeDifference ); |
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225 } |
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226 |
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227 dateTime += timeDifference; |
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228 |
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229 if ( times & KFoundStartTime ) |
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230 { |
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231 aStartTime = dateTime; |
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232 times &= ~KFoundStartTime; |
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233 } |
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234 else if ( times & KFoundEndTime ) |
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235 { |
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236 aEndTime = dateTime; |
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237 times &= ~KFoundEndTime; |
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238 } |
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239 } |
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240 } |
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241 } |
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242 |
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243 // ---------------------------------------------------------------------------- |
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244 // DrmUtilityWmDrmUtilities::ParseWmDrmCountRightsL |
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245 // ---------------------------------------------------------------------------- |
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246 // |
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247 EXPORT_C TBool DrmUtilityWmDrmUtilities::ParseWmDrmCountRightsL( TLex& aLex, |
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248 TUint32& aCounts ) |
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249 { |
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250 TPtrC16 token( NULL, 0 ); |
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251 TInt counts( 0 ); |
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252 TChar ch; |
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253 TLex lex; |
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254 |
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255 ParseString( '=', aLex, token ); |
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256 |
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257 if ( token.CompareF( KCountLeft ) == 0 ) |
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258 { |
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259 ParseString( ';', aLex, token ); |
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260 TLex lexCount( token ); |
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261 User::LeaveIfError( lexCount.Val( counts ) ); |
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262 aCounts = counts; |
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263 return ETrue; |
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264 } |
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265 else |
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266 { |
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267 // No counts left ("countleft=") string was found. |
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268 // -> No count information was found, return EFalse |
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269 return EFalse; |
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270 } |
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271 } |
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272 |
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273 // ---------------------------------------------------------------------------- |
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274 // DrmUtilityWmDrmUtilities::ParseWmDrmDurationRightsL |
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275 // ---------------------------------------------------------------------------- |
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276 // |
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277 EXPORT_C TBool DrmUtilityWmDrmUtilities::ParseWmDrmDurationRightsL( TLex& aLex, |
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278 TTimeIntervalSeconds& aDuration ) |
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279 { |
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280 TPtrC16 token( NULL, 0 ); |
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281 TChar ch; |
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282 TInt duration( 0 ); |
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283 |
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284 ParseString( '=', aLex, token ); |
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285 |
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286 if ( token.CompareF( KDurationLeft ) == 0 ) |
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287 { |
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288 ParseString( ';', aLex, token ); |
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289 TLex lexDuration( token ); |
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290 User::LeaveIfError( lexDuration.Val( duration ) ); |
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291 aDuration = duration; |
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292 return ETrue; |
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293 } |
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294 else |
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295 { |
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296 // No duration left ("durationleft=") string was found. |
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297 // -> No duration information was found, return EFalse |
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298 return EFalse; |
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299 } |
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300 } |
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301 |
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302 // ---------------------------------------------------------------------------- |
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303 // DrmUtilityWmDrmUtilities::ParseWmDrmStringL |
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304 // ---------------------------------------------------------------------------- |
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305 // |
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306 EXPORT_C void DrmUtilityWmDrmUtilities::ParseWmDrmStringL( |
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307 ContentAccess::CRightsInfo& aRights, |
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308 CDRMRightsConstraints*& aRightsConstraint ) |
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309 { |
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310 |
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311 __ASSERT_DEBUG( !aRightsConstraint, |
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312 User::Panic( KWmDrmUtilitiesDebugPanicMessage, |
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313 KWmDrmUtilitiesDebugPanicCode ) ); |
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314 |
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315 TChar ch; |
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316 TTime startTime( Time::NullTTime() ); |
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317 TTime endTime( Time::NullTTime() ); |
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318 TTimeIntervalSeconds duration( 0 ); |
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319 TUint32 counter( 0 ); |
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320 |
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321 TPtrC16 token( NULL, 0 ); |
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322 |
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323 // Parse the WM DRM rights string |
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324 TLex lex( aRights.Description() ); |
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325 |
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326 // First, find the license type format string ("licensetype=") |
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327 ParseString( '=', lex, token ); |
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328 |
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329 if ( token.CompareF( KLicenseType ) != 0 ) |
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330 { |
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331 // License type format string was not found |
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332 User::Leave( KErrArgument ); |
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333 } |
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334 |
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335 // Peek for the end of string (eos) in case of (licensetype="") |
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336 ch = lex.Peek(); |
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337 if ( ch == 0 ) |
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338 { |
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339 return; |
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340 } |
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341 |
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342 // Check the license type |
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343 ParseString( ';', lex, token ); |
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344 |
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345 aRightsConstraint = CDRMRightsConstraints::NewL(); |
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346 CleanupStack::PushL( aRightsConstraint ); |
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347 |
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348 // Check what kind of rights are in question by parsing the string |
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349 // onward. The possible rights are date time (start time and/or end time), |
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350 // count, duration, time count (count and/or date time) and unlimited |
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351 // rights. The substrings for certain rights are further parsed in |
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352 // specific methods. |
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353 if ( token.CompareF( KTime ) == 0 ) |
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354 { |
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355 ParseWmDrmTimeRightsL( lex, startTime, endTime ); |
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356 if ( Time::NullTTime() != startTime ) |
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357 { |
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358 aRightsConstraint->SetStartTime( startTime ); |
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359 } |
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360 if ( Time::NullTTime() != endTime ) |
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361 { |
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362 aRightsConstraint->SetEndTime( endTime ); |
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363 } |
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364 } |
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365 else if ( token.CompareF( KCount ) == 0 ) |
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366 { |
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367 if ( ParseWmDrmCountRightsL( lex, counter ) ) |
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368 { |
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369 aRightsConstraint->SetCounters( counter, counter ); |
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370 } |
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371 } |
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372 else if ( token.CompareF( KDuration ) == 0 ) |
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373 { |
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374 if ( ParseWmDrmDurationRightsL( lex, duration ) ) |
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375 { |
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376 aRightsConstraint->SetInterval( duration ); |
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377 } |
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378 } |
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379 else if ( token.CompareF( KTimeCount ) == 0 ) |
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380 { |
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381 counter = 0; |
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382 if ( ParseWmDrmCountRightsL( lex, counter ) ) |
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383 { |
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384 aRightsConstraint->SetCounters( counter, counter ); |
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385 } |
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386 ParseWmDrmTimeRightsL( lex, startTime, endTime ); |
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387 if ( Time::NullTTime() != startTime ) |
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388 { |
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389 aRightsConstraint->SetStartTime( startTime ); |
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390 } |
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391 if ( Time::NullTTime() != endTime ) |
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392 { |
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393 aRightsConstraint->SetEndTime( endTime ); |
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394 } |
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395 } |
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396 else if ( token.CompareF( KUnlimited ) != 0 ) |
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397 { |
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398 // Unknown license type |
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399 User::Leave( KErrArgument ); |
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400 } |
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401 |
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402 CleanupStack::Pop( aRightsConstraint ); |
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403 |
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404 } |
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405 |
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406 // ----------------------------------------------------------------------------- |
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407 // DrmUtilityWmDrmUtilities::CheckWmDrmRightsL |
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408 // ----------------------------------------------------------------------------- |
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409 // |
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410 EXPORT_C void DrmUtilityWmDrmUtilities::CheckWmDrmRightsL( TBool& aUnconstrained, |
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411 TTimeIntervalSeconds& aTime, |
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412 TInt& aCounts, |
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413 ContentAccess::CRightsInfo& aRights ) |
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414 { |
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415 |
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416 TChar ch; |
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417 TPtrC16 token( NULL, 0 ); |
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418 TInt constraints( 0 ); |
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419 TInt error( KErrNone ); |
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420 TTime startTime( Time::NullTTime() ); |
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421 TTime endTime( Time::NullTTime() ); |
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422 TUint32 counter( 0 ); |
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423 TTime now( Time::NullTTime() ); // current time |
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424 // End time of rights when duration is taken into account. |
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425 TTime durationEndTime( Time::NullTTime() ); |
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426 TTimeIntervalSeconds secondsLeft( 0 ); // seconds to end of time based rights |
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427 |
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428 // Parse WM DRM rights string |
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429 TLex lex( aRights.Description() ); |
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430 |
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431 // First, find the license type format string ("licensetype=") |
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432 ParseString( '=', lex, token ); |
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433 |
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434 if ( token.CompareF( KLicenseType ) != 0 ) |
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435 { |
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436 // License type format string was not found |
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437 User::Leave( KErrArgument ); |
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438 } |
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439 |
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440 // Peek for the end of string (Eos) in case of (licensetype="") |
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441 ch = lex.Peek(); |
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442 if ( ch == 0 ) |
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443 { |
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444 return; |
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445 } |
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446 |
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447 // Check the license type |
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448 ParseString( ';', lex, token ); |
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449 |
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450 // Check what kind of rights are in question by parsing the string |
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451 // onward. The possible rights are date time (start time and/or end time), |
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452 // count, duration, time count (count and/or date time) and unlimited |
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453 // rights. The substrings for certain rights are further parsed in |
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454 // specific methods. |
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455 if ( token.CompareF( KTime ) == 0 ) |
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456 { |
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457 ParseWmDrmTimeRightsL( lex, startTime, endTime ); |
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458 if ( Time::NullTTime() != startTime ) |
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459 { |
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460 constraints |= KWmDrmConstraintStartTime; |
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461 } |
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462 if ( Time::NullTTime() != endTime ) |
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463 { |
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464 constraints |= KWmDrmConstraintEndTime; |
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465 } |
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466 } |
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467 else if ( token.CompareF( KCount ) == 0 ) |
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468 { |
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469 if ( ParseWmDrmCountRightsL( lex, counter ) ) |
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470 { |
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471 aCounts = counter; |
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472 constraints |= KWmDrmConstraintCount; |
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473 } |
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474 } |
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475 else if ( token.CompareF( KDuration ) == 0 ) |
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476 { |
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477 if ( ParseWmDrmDurationRightsL( lex, aTime ) ) |
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478 { |
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479 if ( aTime < (TTimeIntervalSeconds)0 ) |
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480 { |
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481 aTime = 0; |
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482 } |
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483 constraints |= KWmDrmConstraintDuration; |
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484 } |
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485 } |
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486 else if ( token.CompareF( KTimeCount ) == 0 ) |
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487 { |
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488 if ( ParseWmDrmCountRightsL( lex, counter ) ) |
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489 { |
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490 aCounts = counter; |
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491 constraints |= KWmDrmConstraintCount; |
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492 } |
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493 ParseWmDrmTimeRightsL( lex, startTime, endTime ); |
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494 if ( Time::NullTTime() != startTime ) |
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495 { |
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496 constraints |= KWmDrmConstraintStartTime; |
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497 } |
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498 if ( Time::NullTTime() != endTime ) |
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499 { |
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500 constraints |= KWmDrmConstraintEndTime; |
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501 } |
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502 } |
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503 else if ( token.CompareF( KUnlimited ) == 0 ) |
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504 { |
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505 aUnconstrained = ETrue; |
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506 return; |
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507 } |
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508 else |
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509 { |
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510 // Unknown license type |
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511 User::Leave( KErrArgument ); |
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512 } |
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513 |
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514 // Get current time |
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515 now.HomeTime(); |
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516 |
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517 // The rights are not constrained |
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518 if ( !constraints ) |
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519 { |
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520 aUnconstrained = ETrue; |
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521 } |
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522 |
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523 if ( constraints & KWmDrmConstraintStartTime ) |
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524 { |
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525 // The start time is in the past or the current time |
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526 if ( ( now >= startTime ) && |
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527 !( constraints & KWmDrmConstraintEndTime ) && |
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528 !( constraints & KWmDrmConstraintCount ) ) |
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529 { |
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530 aUnconstrained = ETrue; |
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531 } |
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532 |
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533 // This use case is unclear and should be specified later. |
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534 // There are counts for the content, but the start time has |
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535 // not been reached. |
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536 if ( ( constraints & KWmDrmConstraintCount ) && |
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537 ( now < startTime ) ) |
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538 { |
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539 aCounts = 0; |
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540 } |
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541 } |
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542 |
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543 // Find out the amount of time that the rights have left in |
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544 // case the rights have end time constraint. |
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545 if ( constraints & KWmDrmConstraintEndTime ) |
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546 { |
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547 error = endTime.SecondsFrom( now, secondsLeft ); |
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548 |
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549 // The difference between current time and the end time does not |
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550 // fit to 32-bit number, the start time has been reached and there |
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551 // are no count constraints defined. |
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552 if ( ( error == KErrOverflow ) && |
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553 ( !( constraints & KWmDrmConstraintStartTime ) || |
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554 ( now >= startTime ) ) && !( constraints & KWmDrmConstraintCount ) ) |
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555 { |
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556 aUnconstrained = ETrue; |
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557 } |
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558 |
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559 // End time has not been reached and start time has been reached |
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560 if ( ( secondsLeft > (TTimeIntervalSeconds)0 ) && ( now >= startTime ) ) |
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561 { |
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562 aTime = secondsLeft; |
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563 } |
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564 |
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565 // This use case is unclear and should be specified later. |
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566 // There are counts for the content, but the end time has |
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567 // been reached. |
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568 if ( ( constraints & KWmDrmConstraintCount ) && |
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569 ( now > endTime ) ) |
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570 { |
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571 aCounts = 0; |
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572 } |
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573 } |
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574 |
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575 return; |
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576 |
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577 } |
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578 |
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579 // End of File |
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580 |