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1 /* |
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2 * Copyright (c) 2003-2009 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 the License "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: |
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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 #ifndef __DES_INL__ |
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20 #define __DES_INL__ |
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21 |
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22 inline void IPerm(TUint32& left, TUint32& right) |
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23 { |
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24 TUint32 work; |
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25 |
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26 right = rotlFixed(right, 4U); |
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27 work = (left ^ right) & 0xf0f0f0f0; |
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28 left ^= work; |
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29 right = rotrFixed(right^work, 20U); |
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30 work = (left ^ right) & 0xffff0000; |
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31 left ^= work; |
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32 right = rotrFixed(right^work, 18U); |
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33 work = (left ^ right) & 0x33333333; |
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34 left ^= work; |
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35 right = rotrFixed(right^work, 6U); |
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36 work = (left ^ right) & 0x00ff00ff; |
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37 left ^= work; |
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38 right = rotlFixed(right^work, 9U); |
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39 work = (left ^ right) & 0xaaaaaaaa; |
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40 left = rotlFixed(left^work, 1U); |
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41 right ^= work; |
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42 } |
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43 |
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44 inline void FPerm(TUint32& left, TUint32& right) |
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45 { |
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46 TUint32 work; |
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47 |
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48 right = rotrFixed(right, 1U); |
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49 work = (left ^ right) & 0xaaaaaaaa; |
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50 right ^= work; |
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51 left = rotrFixed(left^work, 9U); |
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52 work = (left ^ right) & 0x00ff00ff; |
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53 right ^= work; |
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54 left = rotlFixed(left^work, 6U); |
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55 work = (left ^ right) & 0x33333333; |
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56 right ^= work; |
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57 left = rotlFixed(left^work, 18U); |
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58 work = (left ^ right) & 0xffff0000; |
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59 right ^= work; |
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60 left = rotlFixed(left^work, 20U); |
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61 work = (left ^ right) & 0xf0f0f0f0; |
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62 right ^= work; |
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63 left = rotrFixed(left^work, 4U); |
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64 } |
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65 |
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66 inline void ReverseKeySchedule(TUint32* aKey) |
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67 { |
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68 TInt i = 0; |
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69 for (; i<16; i+=2) |
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70 { |
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71 TClassSwap((*(aKey+i)), (*(aKey+(32-2-i)))); |
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72 TClassSwap((*(aKey+i+1)), (*(aKey+(32-1-i)))); |
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73 } |
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74 } |
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75 |
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76 #endif //__DES_INL__ |