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(DataFlex) AES Key Wrap / UnwrapDemonstrates the AesKeyWrap and AesKeyUnwrap methods that were added to Chilkat v9.5.0.66. This example implements the AES Key Wrap Algorithm as described in RFC 3394. It demonstrates wrapping and unwrapping the test data provided in the RFC. This example requires Chilkat v9.5.0.66 or later.
Use ChilkatAx-9.5.0-win32.pkg Procedure Test Handle hoCrypt String sKek String sKeyData String sWrappedKey String sExpected String sUnwrappedKey String sEncoding // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Note: This example requires Chilkat v9.5.0.66 or later. Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt If (Not(IsComObjectCreated(hoCrypt))) Begin Send CreateComObject of hoCrypt End // The KEK is the Key Encryption Key. It's the AES key that is used // to wrap another AES key which is called the "Key Data". // The KEK can be 128-bit, 192-bit, or 256-bit. // (In other words, it can be 16 bytes, 24 bytes, or 32 bytes) // The Key Data must be a multiple of 64-bits in length. (i.e. a multiple of 8 bytes) // The AES Key Wrap algorithm can wrap not only AES keys, but any data that is a // multiple of 8 bytes in size. Move "hex" To sEncoding // Use a 128-bit KEK to wrap a 128-bit AES key. Move "000102030405060708090A0B0C0D0E0F" To sKek Move "00112233445566778899AABBCCDDEEFF" To sKeyData Move "1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5" To sExpected Showln "---- Use a 128-bit KEK to wrap a 128-bit AES key." Showln "kek = " sKek Showln "keyData = " sKeyData Showln "expected = " sExpected Get ComAesKeyWrap Of hoCrypt sKek sKeyData sEncoding To sWrappedKey Showln "computed = " sWrappedKey Get ComAesKeyUnwrap Of hoCrypt sKek sWrappedKey sEncoding To sUnwrappedKey Showln "unwrapped = " sUnwrappedKey Showln "----" // Use a 192-bit KEK to wrap a 128-bit AES key. Move "000102030405060708090A0B0C0D0E0F1011121314151617" To sKek Move "00112233445566778899AABBCCDDEEFF" To sKeyData Move "96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D" To sExpected Showln "---- Use a 192-bit KEK to wrap a 128-bit AES key." Showln "kek = " sKek Showln "keyData = " sKeyData Showln "expected = " sExpected Get ComAesKeyWrap Of hoCrypt sKek sKeyData sEncoding To sWrappedKey Showln "computed = " sWrappedKey Get ComAesKeyUnwrap Of hoCrypt sKek sWrappedKey sEncoding To sUnwrappedKey Showln "unwrapped = " sUnwrappedKey Showln "----" // Use a 256-bit KEK to wrap a 128-bit AES key. Move "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F" To sKek Move "00112233445566778899AABBCCDDEEFF" To sKeyData Move "64E8C3F9CE0F5BA263E9777905818A2A93C8191E7D6E8AE7" To sExpected Showln "---- Use a 256-bit KEK to wrap a 128-bit AES key." Showln "kek = " sKek Showln "keyData = " sKeyData Showln "expected = " sExpected Get ComAesKeyWrap Of hoCrypt sKek sKeyData sEncoding To sWrappedKey Showln "computed = " sWrappedKey Get ComAesKeyUnwrap Of hoCrypt sKek sWrappedKey sEncoding To sUnwrappedKey Showln "unwrapped = " sUnwrappedKey Showln "----" // Use a 192-bit KEK to wrap a 192-bit AES key. Move "000102030405060708090A0B0C0D0E0F1011121314151617" To sKek Move "00112233445566778899AABBCCDDEEFF0001020304050607" To sKeyData Move "031D33264E15D33268F24EC260743EDCE1C6C7DDEE725A936BA814915C6762D2" To sExpected Showln "---- Use a 192-bit KEK to wrap a 192-bit AES key." Showln "kek = " sKek Showln "keyData = " sKeyData Showln "expected = " sExpected Get ComAesKeyWrap Of hoCrypt sKek sKeyData sEncoding To sWrappedKey Showln "computed = " sWrappedKey Get ComAesKeyUnwrap Of hoCrypt sKek sWrappedKey sEncoding To sUnwrappedKey Showln "unwrapped = " sUnwrappedKey Showln "----" // Use a 256-bit KEK to wrap a 192-bit AES key. Move "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F" To sKek Move "00112233445566778899AABBCCDDEEFF0001020304050607" To sKeyData Move "A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1" To sExpected Showln "---- Use a 256-bit KEK to wrap a 192-bit AES key." Showln "kek = " sKek Showln "keyData = " sKeyData Showln "expected = " sExpected Get ComAesKeyWrap Of hoCrypt sKek sKeyData sEncoding To sWrappedKey Showln "computed = " sWrappedKey Get ComAesKeyUnwrap Of hoCrypt sKek sWrappedKey sEncoding To sUnwrappedKey Showln "unwrapped = " sUnwrappedKey Showln "----" // Use a 256-bit KEK to wrap a 256-bit AES key. Move "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F" To sKek Move "00112233445566778899AABBCCDDEEFF000102030405060708090A0B0C0D0E0F" To sKeyData Move "28C9F404C4B810F4CBCCB35CFB87F8263F5786E2D80ED326CBC7F0E71A99F43BFB988B9B7A02DD21" To sExpected Showln "---- Use a 256-bit KEK to wrap a 256-bit AES key." Showln "kek = " sKek Showln "keyData = " sKeyData Showln "expected = " sExpected Get ComAesKeyWrap Of hoCrypt sKek sKeyData sEncoding To sWrappedKey Showln "computed = " sWrappedKey Get ComAesKeyUnwrap Of hoCrypt sKek sWrappedKey sEncoding To sUnwrappedKey Showln "unwrapped = " sUnwrappedKey Showln "----" // The output: // // ---- Use a 128-bit KEK to wrap a 128-bit AES key. // kek = 000102030405060708090A0B0C0D0E0F // keyData = 00112233445566778899AABBCCDDEEFF // expected = 1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5 // computed = 1FA68B0A8112B447AEF34BD8FB5A7B829D3E862371D2CFE5 // unwrapped = 00112233445566778899AABBCCDDEEFF // ---- // ---- Use a 192-bit KEK to wrap a 128-bit AES key. // kek = 000102030405060708090A0B0C0D0E0F1011121314151617 // keyData = 00112233445566778899AABBCCDDEEFF // expected = 96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D // computed = 96778B25AE6CA435F92B5B97C050AED2468AB8A17AD84E5D // unwrapped = 00112233445566778899AABBCCDDEEFF // ---- // ---- Use a 256-bit KEK to wrap a 128-bit AES key. // kek = 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F // keyData = 00112233445566778899AABBCCDDEEFF // expected = 64E8C3F9CE0F5BA263E9777905818A2A93C8191E7D6E8AE7 // computed = 64E8C3F9CE0F5BA263E9777905818A2A93C8191E7D6E8AE7 // unwrapped = 00112233445566778899AABBCCDDEEFF // ---- // ---- Use a 192-bit KEK to wrap a 192-bit AES key. // kek = 000102030405060708090A0B0C0D0E0F1011121314151617 // keyData = 00112233445566778899AABBCCDDEEFF0001020304050607 // expected = 031D33264E15D33268F24EC260743EDCE1C6C7DDEE725A936BA814915C6762D2 // computed = 031D33264E15D33268F24EC260743EDCE1C6C7DDEE725A936BA814915C6762D2 // unwrapped = 00112233445566778899AABBCCDDEEFF0001020304050607 // ---- // ---- Use a 256-bit KEK to wrap a 192-bit AES key. // kek = 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F // keyData = 00112233445566778899AABBCCDDEEFF0001020304050607 // expected = A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1 // computed = A8F9BC1612C68B3FF6E6F4FBE30E71E4769C8B80A32CB8958CD5D17D6B254DA1 // unwrapped = 00112233445566778899AABBCCDDEEFF0001020304050607 // ---- // ---- Use a 256-bit KEK to wrap a 256-bit AES key. // kek = 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F // keyData = 00112233445566778899AABBCCDDEEFF000102030405060708090A0B0C0D0E0F // expected = 28C9F404C4B810F4CBCCB35CFB87F8263F5786E2D80ED326CBC7F0E71A99F43BFB988B9B7A02DD21 // computed = 28C9F404C4B810F4CBCCB35CFB87F8263F5786E2D80ED326CBC7F0E71A99F43BFB988B9B7A02DD21 // unwrapped = 00112233445566778899AABBCCDDEEFF000102030405060708090A0B0C0D0E0F // ---- // End_Procedure |
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