北郵java智能卡實(shí)驗(yàn)報(bào)告3des加解密

1、智能卡技術(shù)實(shí)驗(yàn)報(bào)告 學(xué)院： 電子工程學(xué)院班級(jí)： 2011211204姓名： 學(xué)號(hào)： 2011210986實(shí)驗(yàn)四 Java卡對(duì)稱加密解密程序一、實(shí)驗(yàn)?zāi)康模航ava卡3DES算法的加密解密程序，并進(jìn)行Java卡程序的編譯和調(diào)測(cè)。二、實(shí)驗(yàn)設(shè)備：PC機(jī)，智能卡讀卡器，Java卡。三、實(shí)驗(yàn)內(nèi)容：1. 建立一個(gè)JavaCard工程2. 編寫3DES算法的加解密應(yīng)用代碼3. 使用智能卡模擬器對(duì)應(yīng)用代碼進(jìn)行調(diào)試4. 使用Java卡對(duì)應(yīng)用代碼進(jìn)行編譯測(cè)試四、實(shí)驗(yàn)報(bào)告：1. 設(shè)計(jì)一個(gè)3DES算法的加密解密小應(yīng)用程序2. 畫出系統(tǒng)結(jié)構(gòu)圖和各部分程序流程圖3. 完成程序的開發(fā)，然后再在Java卡上進(jìn)行驗(yàn)證五、流程

2、圖系統(tǒng)結(jié)構(gòu)流程：各部分流程圖1） 產(chǎn)生隨機(jī)明文流程圖2） 3DES加密流程圖 3）3DES解密流程圖六、演示模擬器隨機(jī)產(chǎn)生8字節(jié)的明文：D4AA3503EC117A56，用時(shí)：1113us加密,密文：DCC74C5B43340FB7,用時(shí)：8445us解密，用時(shí)：6338us插卡產(chǎn)生明文：09FED7DA8FC3B90F，用時(shí)：83990us加密，產(chǎn)生密文：A447987D6FF5CC2C，用時(shí)：682482us解密，用時(shí)：641494us可以看出，插卡后比直接用模擬器，加密解密的時(shí)間長(zhǎng)了很多。七、實(shí)驗(yàn)總結(jié)通過(guò)本次智能卡實(shí)驗(yàn)，我了解了對(duì)稱加密的一些相關(guān)概念與知識(shí)，并學(xué)會(huì)了如何在智能卡上實(shí)現(xiàn)對(duì)稱

3、加解密。八、源代碼package desthree;import javacard.framework.*;import javacard.security.*;import javacardx.crypto.*;public class Desthree extends Appletbyte Random;byte ciphertext=new byte256;byte translation=new byte256;private DESKey deskey;Cipher CipherObj; private byte keyData1=0x01, 0x02, 0x03, 0x04, 0x

4、05, 0x06, 0x07, 0x08;/密鑰private byte keyData2=0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18;private byte keyData3=0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28;protected Desthree()register();public static void install(byte bArray, short bOffset, byte bLength)new Desthree();public void process(APDU

5、 apdu)throws ISOExceptionbyte buffer = apdu.getBuffer();if(bufferISO7816.OFFSET_CLA)=0 && (bufferISO7816.OFFSET_INS)=(byte)(0xa4)return;if(bufferISO7816.OFFSET_INS=(byte)0x84)getRandom();/返回生成的8字節(jié)隨機(jī)數(shù)Util.arrayCopyNonAtomic(Random, (short)0, buffer, (short)0, (short)8);apdu.setOutgoingAndSend

6、(short)0,(short)8);if(bufferISO7816.OFFSET_INS=(byte)0x83)apdu.setIncomingAndReceive();encrypt(buffer); /加密Util.arrayCopyNonAtomic(ciphertext, (short)16, buffer, (short)0, (short)8);apdu.setOutgoingAndSend(short)0,(short)8); if(bufferISO7816.OFFSET_INS=(byte)0x82)apdu.setIncomingAndReceive();doAuthe

7、ntication(buffer); /解密/執(zhí)行加密過(guò)程的代碼private void encrypt(byte buffer) deskey = (DESKey)KeyBuilder.buildKey(KeyBuilder.TYPE_DES,KeyBuilder.LENGTH_DES,false);deskey.setKey(keyData1, (short)0);CipherObj = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M1, false);CipherObj.init(deskey, Cipher.MODE_ENCRYPT);C

8、ipherObj.doFinal(buffer, (short)5, (short)8, ciphertext, (short)0);deskey.setKey(keyData2, (short)0);CipherObj = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M1, false);CipherObj.init(deskey, Cipher.MODE_DECRYPT);CipherObj.doFinal(ciphertext, (short)0, (short)8, ciphertext, (short)8);deskey.setKey(

9、keyData3, (short)0);CipherObj = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M1, false);CipherObj.init(deskey, Cipher.MODE_ENCRYPT);CipherObj.doFinal(ciphertext, (short)8, (short)8, ciphertext, (short)16);/執(zhí)行解密過(guò)程的代碼private void doAuthentication(byte buffer)deskey = (DESKey)KeyBuilder.buildKey(KeyBu

10、ilder.TYPE_DES,KeyBuilder.LENGTH_DES,false);deskey.setKey(keyData3, (short)0);CipherObj = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M1, false);CipherObj.init(deskey, Cipher.MODE_DECRYPT);CipherObj.doFinal(buffer, (short)5, (short)8, translation, (short)0);deskey.setKey(keyData2, (short)0);Cipher

11、Obj = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M1, false);CipherObj.init(deskey, Cipher.MODE_ENCRYPT);CipherObj.doFinal(translation, (short)0, (short)8, translation, (short)8);deskey.setKey(keyData1, (short)0);CipherObj = Cipher.getInstance(Cipher.ALG_DES_CBC_ISO9797_M1, false);CipherObj.init(d

12、eskey, Cipher.MODE_DECRYPT);CipherObj.doFinal(translation, (short)8, (short)8, translation, (short)16);if(Util.arrayCompare(translation, (short)16, Random, (short)0, (short)8)!=0)ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);/獲取隨機(jī)數(shù)private void getRandom()if(Random=null)Random = JCSystem.makeTransientByteArray(short