[关闭]
@guochy2012 2015-01-21T06:50:02.000000Z 字数 14024 阅读 2431

pin block

未分类

  1. import java.io.ByteArrayOutputStream;
  3. import java.io.IOException;
  5. import java.security.InvalidKeyException;
  7. import java.security.NoSuchAlgorithmException;
  9. import java.security.PrivateKey;
  11. import java.security.PublicKey;
  13. import java.security.SecureRandom;
  17. import javax.crypto.BadPaddingException;
  19. import javax.crypto.Cipher;
  21. import javax.crypto.IllegalBlockSizeException;
  23. import javax.crypto.Mac;
  25. import javax.crypto.NoSuchPaddingException;
  27. import javax.crypto.SecretKey;
  29. import javax.crypto.spec.IvParameterSpec;
  31. import javax.crypto.spec.SecretKeySpec;
  35. import org.apache.log4j.Logger;
  39. import cia.broker.common.function.BrokerCommFunc;
  43. /**
  45.  * Description: 密码转PIN
  47.  * 
  49.  * (C) Copyright of China UnionPay Co., Ltd. 2010.
  51.  * @author leoyan
  53.  */
  55. public class SoftSecProc {
  57. /**
  59. * 日志
  61. */
  63. private static final Logger logger = Logger.getLogger(SoftSecProc.class);
  67. /**
  69. * 卡号密码转PIN -- 密码解密
  71. * 
  73. * @param encStr
  75. * @param key
  77. * @return
  79. * @throws CIAException
  81. */
  83. public String decryptedPin(String encStr, PrivateKey key) throws Exception {
  85. String clrPin = null;
  87. Base64Coder base64 = new Base64Coder();
  91. try {
  93. byte[] cryptPin = base64.decode(encStr.getBytes());
  95. Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
  97. new org.bouncycastle.jce.provider.BouncyCastleProvider());
  99. cipher.init(Cipher.DECRYPT_MODE, key);
  101. int blockSize = cipher.getBlockSize();
  103. ByteArrayOutputStream bout = new ByteArrayOutputStream(64);
  105. int j = 0;
  107. while (cryptPin.length - j * blockSize > 0) {
  109. bout.write(cipher.doFinal(cryptPin, j * blockSize, blockSize));
  111. j++;
  113. }
  115. // 加密后的密码
  117. byte[] data = bout.toByteArray();
  119. // 转换成16进制
  121. clrPin = BrokerCommFunc.Hex2Str(data);
  123. } catch (Exception ex) {
  125. logger.error(ex);
  127. throw new Exception(ex);
  129. }
  131. return clrPin;
  133. }
  137. /**
  139. * 卡号密码转PIN -- 加密
  141. * 
  143. * @param plainDataByte
  145. * @return
  147. * @throws CIAException
  149. */
  151. public String encryptedDataByGwCert(byte[] plainDataByte, PublicKey publicKey) throws Exception {
  153. String encData = null;
  155. Base64Coder base64 = new Base64Coder();
  157. // 参数检查
  159. if (plainDataByte == null) {
  161. return null;
  163. }
  165. try {
  167. Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
  169. new org.bouncycastle.jce.provider.BouncyCastleProvider());
  171. cipher.init(Cipher.ENCRYPT_MODE, publicKey);
  173. int blockSize = cipher.getBlockSize();// 获得加密块大小，如：加密前数据为128个byte，而key_size=1024
  175. // 加密块大小为127
  177. // byte,加密后为128个byte;因此共有2个加密块，第一个127
  179. // byte第二个为1个byte
  181. int outputSize = cipher.getOutputSize(plainDataByte.length);// 获得加密块加密后块大小
  183. int leavedSize = plainDataByte.length % blockSize;
  185. int blocksSize = leavedSize != 0
  187. ? plainDataByte.length / blockSize + 1
  189. : plainDataByte.length / blockSize;
  191. // 加密后的数据定义
  193. byte[] data = new byte[outputSize * blocksSize];
  195. int i = 0;
  197. while (plainDataByte.length - i * blockSize > 0) {
  199. if (plainDataByte.length - i * blockSize > blockSize)
  201. cipher.doFinal(plainDataByte, i * blockSize, blockSize, data, i * outputSize);
  203. else
  205. cipher.doFinal(plainDataByte, i * blockSize, plainDataByte.length - i
  207. * blockSize, data, i * outputSize);
  209. i++;
  211. }
  213. // 对加密后的数据进行编码
  215. byte[] raw = base64.encode(data);
  217. encData = new String(raw);
  221. } catch (Exception ex) {
  223. logger.error(ex);
  225. throw new Exception(ex);
  227. }
  229. return encData;
  231. }
  235. /**
  237. * 卡号密码转PIN -- 根据卡号加密
  239. * 
  241. * @param clrPin
  243. * @param sPan
  245. * @return
  247. * @throws CIAException
  249. */
  251. public String encryptedPin(String clrPin, String pan, PublicKey publicKey) throws Exception {
  253. String encPin = null;
  255. Base64Coder base64 = new Base64Coder();
  257. // 参数判断
  259. if (clrPin == null || clrPin.trim().equals("") || pan == null || pan.trim().equals("")) {
  261. return null;
  263. }
  265. try {
  267. /* 生成PIN Block */
  269. byte[] pinBlock = pin2PinBlockWithCardNO(clrPin, pan);
  271. // 加密开始
  273. Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding",
  275. new org.bouncycastle.jce.provider.BouncyCastleProvider());
  277. cipher.init(Cipher.ENCRYPT_MODE, publicKey);
  279. int blockSize = cipher.getBlockSize();// 获得加密块大小，如：加密前数据为128个byte，而key_size=1024
  281. // 加密块大小为127
  283. // byte,加密后为128个byte;因此共有2个加密块，第一个127
  285. // byte第二个为1个byte
  287. int outputSize = cipher.getOutputSize(pinBlock.length);// 获得加密块加密后块大小
  289. int leavedSize = pinBlock.length % blockSize;
  291. int blocksSize = leavedSize != 0 ? pinBlock.length / blockSize + 1 : pinBlock.length
  293. / blockSize;
  295. // 加密后的数据
  297. byte[] data = new byte[outputSize * blocksSize];
  299. int i = 0;
  301. while (pinBlock.length - i * blockSize > 0) {
  303. if (pinBlock.length - i * blockSize > blockSize) {
  305. cipher.doFinal(pinBlock, i * blockSize, blockSize, data, i * outputSize);
  307. } else {
  309. cipher.doFinal(pinBlock, i * blockSize, pinBlock.length - i * blockSize, data,
  311. i * outputSize);
  313. }
  315. // 这里面doUpdate方法不可用，查看源代码后发现每次doUpdate后并没有什么实际动作除了把byte[]放到ByteArrayOutputStream中，而最后doFinal的时候才将所有的byte[]进行加密，可是到了此时加密块大小很可能已经超出了OutputSize所以只好用dofinal方法。
  319. i++;
  321. }
  323. // 对密码进行编码
  325. byte[] raw = base64.encode(data);
  327. encPin = new String(raw);
  331. } catch (Exception ex) {
  333. logger.error(ex);
  335. throw new Exception(ex);
  337. }
  339. return encPin;
  341. }
  345. /**
  347. * 产生MAC
  349. * 
  351. * @param inputByte
  353. * @param inputkey
  355. * @param algorithm
  357. *            "DES" "AES"
  359. * @return
  361. * @throws CIAException
  363. */
  365. public byte[] genmac(byte[] inputByte, byte[] inputkey, String algorithm) throws Exception {
  367. try {
  369. Mac mac = Mac.getInstance("HmacMD5");
  371. SecretKey key = new SecretKeySpec(inputkey, algorithm);
  373. mac.init(key);
  377. byte[] macCode = mac.doFinal(inputByte);
  379. return macCode;
  381. } catch (Exception ex) {
  383. logger.error(ex);
  385. throw new Exception(ex);
  387. }
  389. }
  393. /**
  395. * 二进制转换成十六进制
  397. * 
  399. * @param b
  401. * @return
  403. */
  405. public String byte2hex(byte[] b) {
  407. String hs = "";
  409. String stmp;
  411. for (byte aB : b) {
  413. stmp = (Integer.toHexString(aB & 0XFF));
  415. if (stmp.length() == 1) {
  417. hs = hs + "0" + stmp;
  419. } else {
  421. hs = hs + stmp;
  423. }
  425. }
  429. return hs.toLowerCase();
  431. }
  433. public byte[] hex2byte(byte[] b) {
  435. if ((b.length % 2) != 0) {
  437. throw new IllegalArgumentException("长度不是偶数");
  439. }
  441. byte[] b2 = new byte[b.length / 2];
  443. for (int n = 0; n < b.length; n += 2) {
  445. String item = new String(b, n, 2);
  447. b2[n / 2] = (byte) Integer.parseInt(item, 16);
  449. }
  451. return b2;
  453. }
  457. /**
  459. * 使用DES算法产生MAC
  461. * 
  463. * @param inputByte
  465. * @param inputkey
  467. * @return
  469. * @throws IOException
  471. */
  473. public String genMac(byte[] macData, byte[] macKey) {
  475. try {
  477. // get a instance of Mac, using HmacMD5 algorithm
  479. Mac mac = Mac.getInstance("DES",
  481. new org.bouncycastle.jce.provider.BouncyCastleProvider());
  483. // init the IV of the algorithm, 8 bytes. may read from file
  485. byte[] ivInitKey = {0X00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
  487. IvParameterSpec spec = new IvParameterSpec(ivInitKey);
  489. // the secrete key bytes of the Mac validation, May read from file too
  491. byte[] keyBytes = new byte[8];
  493. // "82A6672F3B05AC25" MAC = 39:92:72:EB
  495. // MAC KEY
  497. BrokerCommFunc.Str2Hex(macKey, keyBytes, 16);
  499. // generate the secrete Key Object using secrete bytes and DESede algorithm
  501. SecretKey key = new SecretKeySpec(keyBytes, "DES");
  503. // init Mac
  505. mac.init(key, spec);
  509. byte[] macCode = mac.doFinal(macData);
  511. System.out.println("MAC = [" + byte2hex(macCode) + "]");
  513. return byte2hex(macCode);
  515. } catch (Exception ex) {
  517. ex.printStackTrace();
  519. return null;
  521. }
  523. }
  527. public static void main(String[] args) throws Exception {
  529. String inputStr = "0220 196222600113522102649 000000 000000000011 1201123145 004023 5311 00 0800207900 0800040000 00000000 020790048140001";
  531. byte[] bMacTmp = inputStr.getBytes();
  533. /* 去掉mac域 */
  535. byte[] bReqMac = new byte[bMacTmp.length - 8];
  537. for (int i = 0; i < bMacTmp.length - 8; i++) {
  539. bReqMac[i] = bMacTmp[i];
  541. }
  545. SoftSecProc macProc = new SoftSecProc();
  547. byte[] MAC = new byte[8];
  549. String mac = macProc.DecMACKey(inputStr.getBytes(), "4944AB7E278E7F89".getBytes());
  551. System.out.println("mac=[" + mac + "]");
  553. mac = macProc.DecMACKey(bReqMac, "4944AB7E278E7F89".getBytes());
  555. System.out.println("mac=[" + mac + "]");
  557. BrokerCommFunc.Str2Hex(mac.getBytes(), MAC, mac.getBytes().length);
  559. System.out.println(new String(MAC));
  563. byte[] MACKey = new byte[16];
  565. BrokerCommFunc.Hex2Str(MAC, MACKey, 8);
  567. System.out.println("MAC=" + new String(MACKey));
  571. String aaaa = macProc.genMac(inputStr.getBytes(), "4944AB7E278E7F89".getBytes());
  573. MACKey = new byte[16];
  575. BrokerCommFunc.Hex2Str(aaaa.getBytes(), MACKey, 8);
  577. System.out.println("MAC=" + new String(MACKey));
  581. System.out.println("DESede解密");
  583. String rlt = macProc.decDESede("33333333333333333333333333333333",
  585. macProc.hex2byte("0A06BB727EE3B97E".getBytes()));
  587. System.out.println("正确结果：[D338F73E98250775];计算结果：[" + rlt + "]");
  589. System.out.println("DESede加密");
  591. rlt = macProc.encDESede("33333333333333333333333333333333",
  593. macProc.hex2byte(rlt.getBytes()));
  595. System.out.println("正确结果：[0A06BB727EE3B97E];计算结果：[" + rlt + "]");
  597. }
  601. /**
  603. * 计算MAC,使用DES加密算法
  605. * 
  607. * @param inputByte
  609. * @param inputkey
  611. * @return
  613. */
  615. public String DecMACKey(byte[] inputByte, byte[] inputkey) {
  619. try {
  621. // Base64Coder base64 = new Base64Coder();
  623. byte[] BMK = new byte[8];
  625. BrokerCommFunc.Str2Hex(inputkey, BMK, 16);
  627. SecretKey key = new SecretKeySpec(BMK, "DES");
  629. Cipher cipher = Cipher.getInstance("DES");
  631. cipher.init(Cipher.ENCRYPT_MODE, key);
  633. byte[] cc = cipher.doFinal(inputByte);
  635. byte[] MACKey = new byte[16];
  637. BrokerCommFunc.Hex2Str(cc, MACKey, 8);
  639. String DecMAK = new String(MACKey);
  641. return DecMAK;
  643. } catch (Exception ex) {
  645. ex.printStackTrace();
  647. return null;
  649. }
  653. }
  655. /**
  657. * 校验MAC
  659. * 
  661. * @param inputByte
  663. * @param inputkey
  665. * @param inputmac
  667. * @param algorithm
  669. *            "DES" "AES"
  671. * @return
  673. * @throws Exception
  675. */
  677. public boolean checkmac(byte[] inputByte, byte[] inputkey, String inputmac, String algorithm)
  679. throws Exception {
  681. try {
  683. java.security.Security
  685. .addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
  687. Mac mac = Mac.getInstance(algorithm);
  689. byte[] keyBytes = new byte[8];
  691. // MAC KEY
  693. BrokerCommFunc.Str2Hex(inputkey, keyBytes, inputkey.length);
  695. SecretKey key = new SecretKeySpec(keyBytes, algorithm);
  697. mac.init(key);
  701. byte[] macCode = mac.doFinal(inputByte);
  703. String strMacCode = byte2hex(macCode);
  705. System.out.println("MAC = [" + strMacCode + "]; inputmac=[" + inputmac + "]");
  709. if (strMacCode.equals(inputmac)) {
  711. return true;
  713. } else {
  715. return false;
  717. }
  719. } catch (Exception ex) {
  721. logger.error(ex);
  723. return false;
  725. }
  727. }
  731. /**
  733. * 消费密码转PIN Block（加入卡号）
  735. * 
  737. * @param aPin
  739. *            消费密码
  741. * @param aCardNO
  743. *            卡号
  745. * @return PIN Block
  747. */
  749. public byte[] pin2PinBlockWithCardNO(String aPin, String aCardNO) {
  751. byte[] tPinByte = pin2PinBlock(aPin);
  753. if (aCardNO.length() == 11) {
  755. aCardNO = "00" + aCardNO;
  757. } else if (aCardNO.length() == 12) {
  759. aCardNO = "0" + aCardNO;
  761. }
  763. byte[] tPanByte = formatPan(aCardNO);
  765. byte[] tByte = new byte[8];
  767. for (int i = 0; i < 8; i++) {
  769. tByte[i] = (byte) (tPinByte[i] ^ tPanByte[i]);
  771. }
  773. return tByte;
  775. }
  779. /**
  781. * 消费密码转PIN Block
  783. * 
  785. * @param aPin
  787. *            消费密码
  789. * @param aCardNO
  791. *            卡号
  793. * @return PIN Block
  795. */
  797. private byte[] pin2PinBlock(String aPin) {
  799. int tTemp = 1;
  801. int tPinLen = aPin.length();
  805. byte[] tByte = new byte[8];
  807. try {
  809. /*******************************************************************
  811. * if (tPinLen > 9) { tByte[0] = (byte) Integer.parseInt(new Integer(tPinLen)
  813. * .toString(), 16); } else { tByte[0] = (byte) Integer.parseInt(new Integer(tPinLen)
  815. * .toString(), 10); }
  817. ******************************************************************/
  819. tByte[0] = (byte) Integer.parseInt(new Integer(tPinLen).toString(), 10);
  821. if (tPinLen % 2 == 0) {
  823. for (int i = 0; i < tPinLen;) {
  825. String a = aPin.substring(i, i + 2);
  827. tByte[tTemp] = (byte) Integer.parseInt(a, 16);
  829. if (i == (tPinLen - 2)) {
  831. if (tTemp < 7) {
  833. for (int x = (tTemp + 1); x < 8; x++) {
  835. tByte[x] = (byte) 0xff;
  837. }
  839. }
  841. }
  843. tTemp++;
  845. i = i + 2;
  847. }
  849. } else {
  851. for (int i = 0; i < tPinLen - 1;) {
  853. String a;
  855. a = aPin.substring(i, i + 2);
  857. tByte[tTemp] = (byte) Integer.parseInt(a, 16);
  859. if (i == (tPinLen - 3)) {
  861. String b = aPin.substring(tPinLen - 1) + "F";
  863. tByte[tTemp + 1] = (byte) Integer.parseInt(b, 16);
  865. if ((tTemp + 1) < 7) {
  867. for (int x = (tTemp + 2); x < 8; x++) {
  869. tByte[x] = (byte) 0xff;
  871. }
  873. }
  875. }
  877. tTemp++;
  879. i = i + 2;
  881. }
  883. }
  885. } catch (Exception e) {
  887. }
  891. return tByte;
  893. }
  897. /**
  899. * 对卡号进行格式化
  901. * 
  903. * @param aPan
  905. *            卡号
  907. * @return 格式化后的卡号
  909. */
  911. private byte[] formatPan(String aPan) {
  913. int tPanLen = aPan.length();
  915. byte[] tByte = new byte[8];;
  917. int temp = tPanLen - 13;
  919. try {
  921. tByte[0] = (byte) 0x00;
  923. tByte[1] = (byte) 0x00;
  925. for (int i = 2; i < 8; i++) {
  927. String a = aPan.substring(temp, temp + 2);
  929. tByte[i] = (byte) Integer.parseInt(a, 16);
  931. temp = temp + 2;
  933. }
  935. } catch (Exception e) {
  937. }
  939. return tByte;
  941. }
  945. /**
  947. * 对传入的Byte数组进行PKCS#1填充
  949. * 
  951. * @param aBytesText
  953. *            欲进行PKCS#1填充的Byte数组
  955. * @param aBlockSize
  957. *            区块大小
  959. * @return 经过PKCS#1填充后的Byte数组，大小等于传入的区块大小。<br>
  961. *         若传入的Byte数组长度超过(填充区块大小-3)时无法进行填充作业，将回传null。
  963. */
  965. private static byte[] addPKCS1Padding(byte[] aBytesText, int aBlockSize) {
  967. if (aBytesText.length > (aBlockSize - 3)) {
  969. // 传入的Byte数组长度超过(填充区块大小-3)
  971. return null;
  973. }
  975. SecureRandom tRandom = new SecureRandom();
  977. byte[] tAfterPaddingBytes = new byte[aBlockSize];
  979. tRandom.nextBytes(tAfterPaddingBytes);
  981. tAfterPaddingBytes[0] = 0x00;
  983. tAfterPaddingBytes[1] = 0x02;
  985. int i = 2;
  987. for (; i < aBlockSize - 1 - aBytesText.length; i++) {
  989. if (tAfterPaddingBytes[i] == 0x00) {
  991. tAfterPaddingBytes[i] = (byte) tRandom.nextInt();
  993. }
  995. }
  997. tAfterPaddingBytes[i] = 0x00;
  999. System.arraycopy(aBytesText, 0, tAfterPaddingBytes, (i + 1), aBytesText.length);
  1003. return tAfterPaddingBytes;
  1005. }
  1009. /**
  1011. * DESede解密（DESede/ECB/NoPadding）
  1013. * 
  1015. * @param desKey
  1017. *            十六进制编码的KEY
  1019. * @param data
  1021. *            被加密的数据
  1023. * @return 返回十六进制的解密结果
  1025. */
  1027. public String decDESede(String desKey, byte[] data) {
  1029. Cipher c1 = null;
  1031. try {
  1033. c1 = Cipher.getInstance("DESede/ECB/NoPadding",
  1035. new org.bouncycastle.jce.provider.BouncyCastleProvider());
  1037. } catch (NoSuchAlgorithmException e) {
  1039. logger.error("DESede/ECB/NoPadding NoSuchAlgorithmException", e);
  1041. return "";
  1043. } catch (NoSuchPaddingException e) {
  1045. logger.error("DESede/ECB/NoPadding NoSuchPaddingException", e);
  1047. return "";
  1049. }
  1051. SecretKeySpec sk = new SecretKeySpec(hex2byte(desKey.getBytes()), "DESede");
  1053. try {
  1055. c1.init(Cipher.DECRYPT_MODE, sk);
  1057. } catch (InvalidKeyException e) {
  1059. logger.error("DESede/ECB/NoPadding InvalidKeyException", e);
  1061. return "";
  1063. }
  1065. byte encode[] = null;
  1067. try {
  1069. encode = c1.doFinal(data);
  1071. } catch (IllegalBlockSizeException e) {
  1073. logger.error("IllegalBlockSizeException", e);
  1075. return "";
  1077. } catch (BadPaddingException e) {
  1079. logger.error("BadPaddingException", e);
  1081. return "";
  1083. }
  1085. String rlt = byte2hex(encode).toUpperCase();
  1087. logger.info("desKey=[" + desKey + "];input data=[" + byte2hex(data) + "]; 解密=[" + rlt + "]");
  1089. return rlt;
  1091. }
  1095. /**
  1097. * DESede加密（DESede/ECB/NoPadding）
  1099. * 
  1101. * @param desKey
  1103. *            十六进制编码的KEY
  1105. * @param data
  1107. *            被加密的数据
  1109. * @return 返回十六进制的解密结果
  1111. */
  1113. public String encDESede(String desKey, byte[] data) {
  1115. Cipher c1 = null;
  1117. try {
  1119. c1 = Cipher.getInstance("DESede/ECB/NoPadding",
  1121. new org.bouncycastle.jce.provider.BouncyCastleProvider());
  1123. } catch (NoSuchAlgorithmException e) {
  1125. logger.error("DESede/ECB/NoPadding NoSuchAlgorithmException", e);
  1127. return "";
  1129. } catch (NoSuchPaddingException e) {
  1131. logger.error("DESede/ECB/NoPadding NoSuchPaddingException", e);
  1133. return "";
  1135. }
  1137. SecretKeySpec sk = new SecretKeySpec(hex2byte(desKey.getBytes()), "DESede");
  1139. try {
  1141. c1.init(Cipher.ENCRYPT_MODE, sk);
  1143. } catch (InvalidKeyException e) {
  1145. logger.error("DESede/ECB/NoPadding InvalidKeyException", e);
  1147. return "";
  1149. }
  1151. byte encode[] = null;
  1153. try {
  1155. encode = c1.doFinal(data);
  1157. } catch (IllegalBlockSizeException e) {
  1159. logger.error("IllegalBlockSizeException", e);
  1161. return "";
  1163. } catch (BadPaddingException e) {
  1165. logger.error("BadPaddingException", e);
  1167. return "";
  1169. }
  1171. String rlt = byte2hex(encode).toUpperCase();
  1173. logger.info("desKey=[" + desKey + "];input data=[" + byte2hex(data) + "]; 解密=[" + rlt + "]");
  1175. return rlt;
  1177. }
  1181. // public String encryptedDataByGwCert(byte[] plainDataByte, PublicKey publicKey)
  1185. }
  1189. 补充调用的公共方法： 
  1190. public static boolean Str2Hex(byte in[], byte out[], int len) {
  1191. byte asciiCode[] = {10, 11, 12, 13, 14, 15};
  1192. if (len > in.length)
  1193. return false;
  1194. if (len % 2 != 0)
  1195. return false;
  1196. byte temp[] = new byte[len];
  1197. for (int i = 0; i < len; i++)
  1198. if (in[i] >= 48 && in[i] <= 57)
  1199. temp[i] = (byte) (in[i] - 48);
  1200. else if (in[i] >= 65 && in[i] <= 70)
  1201. temp[i] = asciiCode[in[i] - 65];
  1202. else if (in[i] >= 97 && in[i] <= 102)
  1203. temp[i] = asciiCode[in[i] - 97];
  1204. else
  1205. return false;
  1207. for (int i = 0; i < len / 2; i++)
  1208. out[i] = (byte) (temp[2 * i] * 16 + temp[2 * i + 1]);
  1210. return true;
  1211. }
  1213. public static boolean Hex2Str(byte in[], byte out[], int len) {
  1214. byte asciiCode[] = {65, 66, 67, 68, 69, 70};
  1215. if (len > in.length)
  1216. return false;
  1217. byte temp[] = new byte[2 * len];
  1218. for (int i = 0; i < len; i++) {
  1219. temp[2 * i] = (byte) ((in[i] & 0xf0) / 16);
  1220. temp[2 * i + 1] = (byte) (in[i] & 0xf);
  1221. }
  1223. for (int i = 0; i < 2 * len; i++)
  1224. if (temp[i] <= 9 && temp[i] >= 0)
  1225. out[i] = (byte) (temp[i] + 48);
  1226. else
  1227. out[i] = asciiCode[temp[i] - 10];
  1229. return true;
  1230. }
添加新批注
在作者公开此批注前，只有你和作者可见。
回复批注