SM4加密

This commit is contained in:
cwchen 2024-09-11 10:57:30 +08:00
parent b7201ffd54
commit 8be434b6c7
4 changed files with 1141 additions and 0 deletions

View File

@ -0,0 +1,281 @@
package com.securitycontrol.common.core.utils.aes;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* @author 徐一杰
* @date 2022/10/11
*/
class SM4 {
private static final Logger logger = Logger.getLogger(SM4.class.getPackage().getName());
public static final int SM4_ENCRYPT = 1;
public static final int SM4_DECRYPT = 0;
private int getUlongBe(byte[] b, int i) {
return (b[i] & 0xff) << 24 | ((b[i + 1] & 0xff) << 16) | ((b[i + 2] & 0xff) << 8)
| b[i + 3] & 0xff & 0xffffffff;
}
private void putUlongBe(int n, byte[] b, int i) {
b[i] = (byte) (0xFF & n >> 24);
b[i + 1] = (byte) (0xFF & n >> 16);
b[i + 2] = (byte) (0xFF & n >> 8);
b[i + 3] = (byte) (0xFF & n);
}
private int shl(int x, int n) {
return (x & 0xFFFFFFFF) << n;
}
private int rotl(int x, int n) {
return shl(x, n) | x >> (32 - n);
}
protected static final byte[] SBOX_TABLE = {(byte) 0xd6, (byte) 0x90, (byte) 0xe9, (byte) 0xfe, (byte) 0xcc,
(byte) 0xe1, 0x3d, (byte) 0xb7, 0x16, (byte) 0xb6, 0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b,
0x67, (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3, (byte) 0xaa, 0x44, 0x13, 0x26, 0x49,
(byte) 0x86, 0x06, (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91, (byte) 0xef, (byte) 0x98,
0x7a, 0x33, 0x54, 0x0b, 0x43, (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62, (byte) 0xe4, (byte) 0xb3, 0x1c,
(byte) 0xa9, (byte) 0xc9, 0x08, (byte) 0xe8, (byte) 0x95, (byte) 0x80, (byte) 0xdf, (byte) 0x94,
(byte) 0xfa, 0x75, (byte) 0x8f, 0x3f, (byte) 0xa6, 0x47, 0x07, (byte) 0xa7, (byte) 0xfc, (byte) 0xf3, 0x73,
0x17, (byte) 0xba, (byte) 0x83, 0x59, 0x3c, 0x19, (byte) 0xe6, (byte) 0x85, 0x4f, (byte) 0xa8, 0x68, 0x6b,
(byte) 0x81, (byte) 0xb2, 0x71, 0x64, (byte) 0xda, (byte) 0x8b, (byte) 0xf8, (byte) 0xeb, 0x0f, 0x4b, 0x70,
0x56, (byte) 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, (byte) 0xd1, (byte) 0xa2, 0x25, 0x22, 0x7c,
0x3b, 0x01, 0x21, 0x78, (byte) 0x87, (byte) 0xd4, 0x00, 0x46, 0x57, (byte) 0x9f, (byte) 0xd3, 0x27, 0x52,
0x4c, 0x36, 0x02, (byte) 0xe7, (byte) 0xa0, (byte) 0xc4, (byte) 0xc8, (byte) 0x9e, (byte) 0xea, (byte) 0xbf,
(byte) 0x8a, (byte) 0xd2, 0x40, (byte) 0xc7, 0x38, (byte) 0xb5, (byte) 0xa3, (byte) 0xf7, (byte) 0xf2,
(byte) 0xce, (byte) 0xf9, 0x61, 0x15, (byte) 0xa1, (byte) 0xe0, (byte) 0xae, 0x5d, (byte) 0xa4, (byte) 0x9b,
0x34, 0x1a, 0x55, (byte) 0xad, (byte) 0x93, 0x32, 0x30, (byte) 0xf5, (byte) 0x8c, (byte) 0xb1, (byte) 0xe3,
0x1d, (byte) 0xf6, (byte) 0xe2, 0x2e, (byte) 0x82, 0x66, (byte) 0xca, 0x60, (byte) 0xc0, 0x29, 0x23,
(byte) 0xab, 0x0d, 0x53, 0x4e, 0x6f, (byte) 0xd5, (byte) 0xdb, 0x37, 0x45, (byte) 0xde, (byte) 0xfd,
(byte) 0x8e, 0x2f, 0x03, (byte) 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, (byte) 0x8d, 0x1b, (byte) 0xaf,
(byte) 0x92, (byte) 0xbb, (byte) 0xdd, (byte) 0xbc, 0x7f, 0x11, (byte) 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a,
(byte) 0xd8, 0x0a, (byte) 0xc1, 0x31, (byte) 0x88, (byte) 0xa5, (byte) 0xcd, 0x7b, (byte) 0xbd, 0x2d, 0x74,
(byte) 0xd0, 0x12, (byte) 0xb8, (byte) 0xe5, (byte) 0xb4, (byte) 0xb0, (byte) 0x89, 0x69, (byte) 0x97, 0x4a,
0x0c, (byte) 0x96, 0x77, 0x7e, 0x65, (byte) 0xb9, (byte) 0xf1, 0x09, (byte) 0xc5, 0x6e, (byte) 0xc6,
(byte) 0x84, 0x18, (byte) 0xf0, 0x7d, (byte) 0xec, 0x3a, (byte) 0xdc, 0x4d, 0x20, 0x79, (byte) 0xee, 0x5f,
0x3e, (byte) 0xd7, (byte) 0xcb, 0x39, 0x48};
protected static final int[] FK = {0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc};
protected static final int[] CK = {0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, 0x70777e85, 0x8c939aa1, 0xa8afb6bd,
0xc4cbd2d9, 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, 0xa0a7aeb5,
0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279};
private byte sm4Sbox(byte inch) {
int i = inch & 0xFF;
return SBOX_TABLE[i];
}
private int sm4Lt(int ka) {
int bb;
int c;
byte[] a = new byte[4];
byte[] b = new byte[4];
putUlongBe(ka, a, 0);
b[0] = sm4Sbox(a[0]);
b[1] = sm4Sbox(a[1]);
b[2] = sm4Sbox(a[2]);
b[3] = sm4Sbox(a[3]);
bb = getUlongBe(b, 0);
c = bb ^ rotl(bb, 2) ^ rotl(bb, 10) ^ rotl(bb, 18) ^ rotl(bb, 24);
return c;
}
private int sm4F(int x0, int x1, int x2, int x3, int rk) {
return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);
}
private int sm4CalciRk(int ka) {
int bb;
int rk;
byte[] a = new byte[4];
byte[] b = new byte[4];
putUlongBe(ka, a, 0);
b[0] = sm4Sbox(a[0]);
b[1] = sm4Sbox(a[1]);
b[2] = sm4Sbox(a[2]);
b[3] = sm4Sbox(a[3]);
bb = getUlongBe(b, 0);
rk = bb ^ rotl(bb, 13) ^ rotl(bb, 23);
return rk;
}
private void sm4SetKey(int[] sk, byte[] key) {
int[] mK = new int[4];
int[] k = new int[36];
int i = 0;
mK[0] = getUlongBe(key, 0);
mK[1] = getUlongBe(key, 4);
mK[2] = getUlongBe(key, 8);
mK[3] = getUlongBe(key, 12);
k[0] = mK[0] ^ FK[0];
k[1] = mK[1] ^ FK[1];
k[2] = mK[2] ^ FK[2];
k[3] = mK[3] ^ FK[3];
for (; i < 32; i++) {
k[(i + 4)] = (k[i] ^ sm4CalciRk(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ CK[i]));
sk[i] = k[(i + 4)];
}
}
private void sm4OneRound(int[] sk, byte[] input, byte[] output) {
int i = 0;
int[] ulbuf = new int[36];
ulbuf[0] = getUlongBe(input, 0);
ulbuf[1] = getUlongBe(input, 4);
ulbuf[2] = getUlongBe(input, 8);
ulbuf[3] = getUlongBe(input, 12);
while (i < 32) {
ulbuf[(i + 4)] = sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
i++;
}
putUlongBe(ulbuf[35], output, 0);
putUlongBe(ulbuf[34], output, 4);
putUlongBe(ulbuf[33], output, 8);
putUlongBe(ulbuf[32], output, 12);
}
private byte[] padding(byte[] input, int mode) {
byte[] ret;
if (mode == SM4_ENCRYPT) {
int p = 16 - input.length % 16;
ret = new byte[input.length + p];
System.arraycopy(input, 0, ret, 0, input.length);
for (int i = 0; i < p; i++) {
ret[input.length + i] = (byte) p;
}
} else {
int p = input[input.length - 1];
ret = new byte[input.length - p];
System.arraycopy(input, 0, ret, 0, input.length - p);
}
return ret;
}
private void validateDecrypt(SM4Context ctx, byte[] key) throws NullPointerException {
if (ctx == null) {
logger.log(Level.WARNING, "ctx is null");
throw new NullPointerException("ctx is null!");
}
if (key == null || key.length != 16) {
logger.log(Level.WARNING, "secretKey必须为 16 位,可包含字母、数字、标点");
throw new NullPointerException("secretKey必须为 16 位,可包含字母、数字、标点");
}
}
private void validateEncrypt(String type, byte[] iv, byte[] input) throws IllegalArgumentException {
if (SM4Utils.CBC.equals(type) && (iv == null || iv.length != 16)) {
logger.log(Level.WARNING, "iv必须为 16 位,可包含字母、数字、标点");
throw new IllegalArgumentException("iv必须为 16 位,可包含字母、数字、标点");
}
if (input == null) {
logger.log(Level.WARNING, "要加解密的数据为null");
throw new IllegalArgumentException("要加解密的数据为null");
}
}
public void sm4SetKeyEnc(SM4Context ctx, byte[] key) {
validateDecrypt(ctx, key);
ctx.mode = SM4_ENCRYPT;
sm4SetKey(ctx.sk, key);
}
public byte[] sm4CryptEcb(SM4Context ctx, byte[] input) throws IOException {
validateEncrypt(SM4Utils.ECB, null, input);
if ((ctx.isPadding) && (ctx.mode == SM4_ENCRYPT)) {
input = padding(input, SM4_ENCRYPT);
}
int length = input.length;
ByteArrayInputStream bins = new ByteArrayInputStream(input);
ByteArrayOutputStream bous = new ByteArrayOutputStream();
for (; length > 0; length -= 16) {
byte[] in = new byte[16];
byte[] out = new byte[16];
bins.read(in);
sm4OneRound(ctx.sk, in, out);
bous.write(out);
}
byte[] output = bous.toByteArray();
if (ctx.isPadding && ctx.mode == SM4_DECRYPT) {
output = padding(output, SM4_DECRYPT);
}
bins.close();
bous.close();
return output;
}
public void sm4SetKeyDec(SM4Context ctx, byte[] key) {
validateDecrypt(ctx, key);
int i;
ctx.mode = SM4_DECRYPT;
sm4SetKey(ctx.sk, key);
for (i = 0; i < 16; i++) {
swap(ctx.sk, i);
}
}
private void swap(int[] sk, int i) {
int t = sk[i];
sk[i] = sk[(31 - i)];
sk[(31 - i)] = t;
}
public byte[] sm4CryptCbc(SM4Context ctx, byte[] iv, byte[] input) throws IOException {
validateEncrypt(SM4Utils.CBC, iv, input);
if (ctx.isPadding && ctx.mode == SM4_ENCRYPT) {
input = padding(input, SM4_ENCRYPT);
}
int i;
int length = input.length;
ByteArrayInputStream bins = new ByteArrayInputStream(input);
ByteArrayOutputStream bous = new ByteArrayOutputStream();
if (ctx.mode == SM4_ENCRYPT) {
for (; length > 0; length -= 16) {
byte[] in = new byte[16];
byte[] out = new byte[16];
byte[] out1 = new byte[16];
bins.read(in);
for (i = 0; i < 16; i++) {
out[i] = ((byte) (in[i] ^ iv[i]));
}
sm4OneRound(ctx.sk, out, out1);
System.arraycopy(out1, 0, iv, 0, 16);
bous.write(out1);
}
} else {
byte[] temp = new byte[16];
for (; length > 0; length -= 16) {
byte[] in = new byte[16];
byte[] out = new byte[16];
byte[] out1 = new byte[16];
bins.read(in);
System.arraycopy(in, 0, temp, 0, 16);
sm4OneRound(ctx.sk, in, out);
for (i = 0; i < 16; i++) {
out1[i] = ((byte) (out[i] ^ iv[i]));
}
System.arraycopy(temp, 0, iv, 0, 16);
bous.write(out1);
}
}
byte[] output = bous.toByteArray();
if (ctx.isPadding && ctx.mode == SM4_DECRYPT) {
output = padding(output, SM4_DECRYPT);
}
bins.close();
bous.close();
return output;
}
}

View File

@ -0,0 +1,19 @@
package com.securitycontrol.common.core.utils.aes;
/**
* @author 徐一杰
* @date 2022/10/11
*/
class SM4Context {
int mode;
int[] sk;
boolean isPadding;
public SM4Context() {
this.mode = 1;
this.isPadding = true;
this.sk = new int[32];
}
}

View File

@ -0,0 +1,222 @@
package com.securitycontrol.common.core.utils.aes;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author 徐一杰
* @date 2022/10/11
* <p>
* ECB 加密模式
* 不使用自定义 secretKey一般用于后端自行加解密,如果是前端加密后端解密则需要自定义secretKey前后端一致才能正确解密
* 经过ECB加密的密文为SM4Utils.encryptData_ECB("123456");
* 经过ECB解密的密文为SM4Utils.decryptData_ECB("UQZqWWcVSu7MIrMzWRD/wA==");
* 使用自定义 secretKey传入的 secretKey 必须为16位可包含字母数字标点
* 经过ECB加密的密文为SM4Utils.encryptData_ECB("123456");
* 经过ECB解密的密文为SM4Utils.decryptData_ECB("UQZqWWcVSu7MIrMzWRD/wA==");
* <p>
* CBC 加密模式更加安全需要两个密钥
* 经过CBC加密的密文为SM4Utils.encryptData_CBC("123456");
* 经过CBC解密的密文为SM4Utils.decryptData_CBC("hbMK6/IeJ3UTzaTgLb3f3A==");
* 同样可以自定义 secretKey iv需要两个密钥前后端都一致
* 经过CBC加密的密文为SM4Utils.encryptData_CBC("123456","asdfghjklzxcvb!_","1234567890123456");
* 经过CBC解密的密文为SM4Utils.decryptData_CBC("sTyCl3G6TF311kIENzsKNg==","asdfghjklzxcvb!_","1234567890123456");
*/
public class SM4Utils {
private SM4Utils() {
}
private static final Logger logger = Logger.getLogger(SM4Utils.class.getPackage().getName());
/**
* 默认 SECRET_KEY
* 当时用ECB模式的时候和前端key一致
* secretKey 必须为16位可包含字母数字标点
*/
private static final String SECRET_KEY = "zhgd@bonus123456";
/**
* 默认 IV
* 当时用CBC模式的时候SECRET_KEY和IV都需要传值解密要和加密的SECRET_KEY和IV一致更加安全
* iv 必须为 16 可包含字母数字标点
*/
private static final String IV = "1234567812345678";
static final String ECB = "ECB";
static final String CBC = "CBC";
private static final boolean HEX_STRING = false;
private static final Pattern P = Pattern.compile("\\s*|\t|\r|\n");
private static String encryptData(String type, String plainText, String secretKey, String iv) {
try {
SM4Context ctx = new SM4Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_ENCRYPT;
byte[] keyBytes = secretKey == null ? SECRET_KEY.getBytes() : secretKey.getBytes();
SM4 sm4 = new SM4();
sm4.sm4SetKeyEnc(ctx, keyBytes);
String cipherText;
if (ECB.equals(type)) {
byte[] encrypted = sm4.sm4CryptEcb(ctx, plainText.getBytes(StandardCharsets.UTF_8));
cipherText = Base64.getEncoder().encodeToString(encrypted);
if (cipherText != null && !cipherText.trim().isEmpty()) {
Matcher m = P.matcher(cipherText);
cipherText = m.replaceAll("");
}
} else {
byte[] ivBytes = iv == null ? IV.getBytes() : iv.getBytes();
byte[] encrypted = sm4.sm4CryptCbc(ctx, ivBytes, plainText.getBytes(StandardCharsets.UTF_8));
cipherText = Base64.getEncoder().encodeToString(encrypted);
if (cipherText != null && !cipherText.trim().isEmpty()) {
Matcher m = P.matcher(cipherText);
cipherText = m.replaceAll("");
}
}
return cipherText;
} catch (Exception e) {
logger.log(Level.WARNING, "加密失败!", e);
return null;
}
}
public static void main(String[] args) {
System.err.println( decryptData_CBC("VlWYLrghArikg+SQKS4obg=="));
}
private static String decryptData(String type, String cipherText, String secretKey, String iv) {
try {
SM4Context ctx = new SM4Context();
ctx.isPadding = true;
ctx.mode = SM4.SM4_DECRYPT;
SM4 sm4 = new SM4();
byte[] bytes = secretKey == null ? SECRET_KEY.getBytes() : secretKey.getBytes();
if (ECB.equals(type)) {
sm4.sm4SetKeyDec(ctx, bytes);
byte[] decrypted = sm4.sm4CryptEcb(ctx, Base64.getDecoder().decode(cipherText));
return new String(decrypted, StandardCharsets.UTF_8);
} else {
byte[] keyBytes;
byte[] ivBytes;
if (HEX_STRING) {
keyBytes = Util.hexStringToBytes(secretKey);
ivBytes = Util.hexStringToBytes(iv);
} else {
keyBytes = bytes;
ivBytes = iv == null ? IV.getBytes() : iv.getBytes();
}
sm4.sm4SetKeyDec(ctx, keyBytes);
byte[] decrypted = sm4.sm4CryptCbc(ctx, ivBytes, Base64.getDecoder().decode(cipherText));
return new String(decrypted, StandardCharsets.UTF_8);
}
} catch (Exception e) {
logger.log(Level.WARNING, "解密失败!请检查密钥和密文是否对应", e);
return null;
}
}
/**
* ECB模式加密自定义密钥加解密密钥需一致
*
* @param plainText 要加密的数据
* @param secretKey 密钥必须为 16 可包含字母数字标点
* @return 加密后的字符串
*/
public static String encryptData_ECB(String plainText, String secretKey) {
return encryptData(ECB, plainText, secretKey, null);
}
/**
* ECB模式加密默认密钥
*
* @param plainText 要加密的数据
* @return 加密后的字符串
*/
public static String encryptData_ECB(String plainText) {
return encryptData(ECB, plainText, null, null);
}
/**
* ECB模式解密自定义密钥加解密密钥需一致
*
* @param cipherText 要解密的数据
* @param secretKey 密钥必须为 16 可包含字母数字标点
* @return 解密后的字符串
*/
public static String decryptData_ECB(String cipherText, String secretKey) {
return decryptData(ECB, cipherText, secretKey, null);
}
/**
* ECB模式解密默认密钥
*
* @param cipherText 要解密的数据
* @return 解密后的字符串
*/
public static String decryptData_ECB(String cipherText) {
return decryptData(ECB, cipherText, null, null);
}
/**
* CBC模式加密SECRET_KEY和IV都需要传值解密要和加密的SECRET_KEY和IV一致更加安全
*
* @param plainText 要加密的数据
* @param secretKey 密钥一必须为 16 可包含字母数字标点
* @param iv 密钥二必须为 16 可包含字母数字标点
* @return 加密后的字符串
*/
public static String encryptData_CBC(String plainText, String secretKey, String iv) {
return encryptData(CBC, plainText, secretKey, iv);
}
/**
* CBC模式加密SECRET_KEY和IV都需要传值解密要和加密的SECRET_KEY和IV一致更加安全
*
* @param plainText 要加密的数据
* @return 加密后的字符串
*/
public static String encryptData_CBC(String plainText) {
return encryptData(CBC, plainText, null, null);
}
/**
* CBC模式解密SECRET_KEY和IV都需要传值解密要和加密的SECRET_KEY和IV一致更加安全
*
* @param cipherText 要解密的数据
* @param secretKey 密钥一必须为 16 可包含字母数字标点
* @param iv 密钥二必须为 16 可包含字母数字标点
* @return 解密后的字符串
*/
public static String decryptData_CBC(String cipherText, String secretKey, String iv) {
return decryptData(CBC, cipherText, secretKey, iv);
}
/**
* CBC模式解密SECRET_KEY和IV都需要传值解密要和加密的SECRET_KEY和IV一致更加安全
*
* @param cipherText 要解密的数据
* @return 解密后的字符串
*/
public static String decryptData_CBC(String cipherText) {
return decryptData(CBC, cipherText, null, null);
}
// public static void main(String[] args) {
// System.out.println("经过ECB加密的密文为" + SM4Utils.encryptData_ECB("41150320000416041X"));
// System.out.println("经过ECB解密的密文为" + SM4Utils.decryptData_ECB("ZaCySfpl8DLflqpnM67eqBuFHqHevz6NvJY7i77t4zk="));
// System.out.println("经过CBC自定义密钥加密的密文为" + SM4Utils.encryptData_CBC("41150320000416041X", "1sdfghjklzxcvbnm", ".234567890@$^-_*"));
// System.out.println("经过CBC自定义密钥解密的密文为" + SM4Utils.decryptData_CBC("eB/OnKKFHwNLBl7s4QvGX7rtqS0LqfmU8AuXnhqjCbM=", "1sdfghjklzxcvbnm", ".234567890@$^-_*"));
// System.out.println(SM4Utils.encryptData_CBC("圣诞卡是你打死你"));
// System.out.println(SM4Utils.decryptData_CBC("fhMAEzAxdPNTe9I346GNTgQmnjpBfjJHQCFj+TxQDUg="));
// }
}

View File

@ -0,0 +1,619 @@
package com.securitycontrol.common.core.utils.aes;
import java.math.BigInteger;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* @author 徐一杰
* @date 2022/10/11
*/
class Util {
private Util() {
}
private static final Logger logger = Logger.getLogger(Util.class.getPackage().getName());
/**
* 整形转换成网络传输的字节流字节数组型数据
*
* @param num 一个整型数据
* @return 4个字节的自己数组
*/
public static byte[] intToBytes(int num) {
byte[] bytes = new byte[4];
bytes[0] = (byte) (0xff & (num));
bytes[1] = (byte) (0xff & (num >> 8));
bytes[2] = (byte) (0xff & (num >> 16));
bytes[3] = (byte) (0xff & (num >> 24));
return bytes;
}
/**
* 四个字节的字节数据转换成一个整形数据
*
* @param bytes 4个字节的字节数组
* @return 一个整型数据
*/
public static int byteToInt(byte[] bytes) {
int num = 0;
int temp;
temp = (0x000000ff & (bytes[0]));
num = num | temp;
temp = (0x000000ff & (bytes[1])) << 8;
num = num | temp;
temp = (0x000000ff & (bytes[2])) << 16;
num = num | temp;
temp = (0x000000ff & (bytes[3])) << 24;
num = num | temp;
return num;
}
/**
* 长整形转换成网络传输的字节流字节数组型数据
*
* @param num 一个长整型数据
* @return 4个字节的自己数组
*/
public static byte[] longToBytes(long num) {
byte[] bytes = new byte[8];
for (int i = 0; i < 8; i++) {
bytes[i] = (byte) (0xff & (num >> (i * 8)));
}
return bytes;
}
/**
* 大数字转换字节流字节数组型数据
*
* @param n 大数字
* @return 字节流字节数组
*/
public static byte[] byteConvert32Bytes(BigInteger n) {
byte[] tmp;
if (n == null) {
return null;
}
if (n.toByteArray().length == 33) {
tmp = new byte[32];
System.arraycopy(n.toByteArray(), 1, tmp, 0, 32);
} else if (n.toByteArray().length == 32) {
tmp = n.toByteArray();
} else {
tmp = new byte[32];
for (int i = 0; i < 32 - n.toByteArray().length; i++) {
tmp[i] = 0;
}
System.arraycopy(n.toByteArray(), 0, tmp, 32 - n.toByteArray().length, n.toByteArray().length);
}
return tmp;
}
/**
* 字节流字节数组型数据转大数字
*
* @param b 字节流字节数组
* @return 大数字
*/
public static BigInteger byteConvertInteger(byte[] b) {
if (b[0] < 0) {
byte[] temp = new byte[b.length + 1];
temp[0] = 0;
System.arraycopy(b, 0, temp, 1, b.length);
return new BigInteger(temp);
}
return new BigInteger(b);
}
/**
* 根据字节数组获得值(十六进制数字)
*
* @param bytes 字节数组
* @return 十六进制数字
*/
public static String getHexString(byte[] bytes) {
return getHexString(bytes, true);
}
/**
* 根据字节数组获得值(十六进制数字)
*
* @param bytes 字节数组
* @param upperCase 是否大写
* @return 十六进制数字
*/
public static String getHexString(byte[] bytes, boolean upperCase) {
StringBuilder ret = new StringBuilder();
for (byte aByte : bytes) {
ret.append(Integer.toString((aByte & 0xff) + 0x100, 16).substring(1));
}
return upperCase ? ret.toString().toUpperCase() : ret.toString();
}
/**
* 打印十六进制字符串
*
* @param bytes 字节数组
*/
public static void printHexString(byte[] bytes) {
for (byte aByte : bytes) {
String hex = Integer.toHexString(aByte & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
System.out.println("0x" + hex.toUpperCase() + ",");
}
}
/**
* Convert hex string to byte[]
*
* @param hexString the hex string
* @return byte[]
*/
public static byte[] hexStringToBytes(String hexString) {
if (hexString == null || hexString.isEmpty()) {
return null;
}
hexString = hexString.toUpperCase();
int length = hexString.length() / 2;
char[] hexChars = hexString.toCharArray();
byte[] d = new byte[length];
for (int i = 0; i < length; i++) {
int pos = i * 2;
d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]) & 0xff);
}
return d;
}
/**
* Convert char to byte
*
* @param c char
* @return byte
*/
public static byte charToByte(char c) {
return (byte) "0123456789ABCDEF".indexOf(c);
}
/**
* 用于建立十六进制字符的输出的小写字符数组
*/
private static final char[] DIGITS_LOWER = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
/**
* 用于建立十六进制字符的输出的大写字符数组
*/
private static final char[] DIGITS_UPPER = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
/**
* 将字节数组转换为十六进制字符数组
*
* @param data byte[]
* @return 十六进制char[]
*/
public static char[] encodeHex(byte[] data) {
return encodeHex(data, true);
}
/**
* 将字节数组转换为十六进制字符数组
*
* @param data byte[]
* @param toLowerCase <code>true</code> 传换成小写格式 <code>false</code> 传换成大写格式
* @return 十六进制char[]
*/
public static char[] encodeHex(byte[] data, boolean toLowerCase) {
return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
}
/**
* 将字节数组转换为十六进制字符数组
*
* @param data byte[]
* @param toDigits 用于控制输出的char[]
* @return 十六进制char[]
*/
protected static char[] encodeHex(byte[] data, char[] toDigits) {
int l = data.length;
char[] out = new char[l << 1];
// two characters form the hex value.
int j = 0;
for (byte datum : data) {
out[j++] = toDigits[(0xF0 & datum) >>> 4];
out[j++] = toDigits[0x0F & datum];
}
return out;
}
/**
* 将字节数组转换为十六进制字符串
*
* @param data byte[]
* @return 十六进制String
*/
public static String encodeHexString(byte[] data) {
return encodeHexString(data, true);
}
/**
* 将字节数组转换为十六进制字符串
*
* @param data byte[]
* @param toLowerCase <code>true</code> 传换成小写格式 <code>false</code> 传换成大写格式
* @return 十六进制String
*/
public static String encodeHexString(byte[] data, boolean toLowerCase) {
return encodeHexString(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
}
/**
* 将字节数组转换为十六进制字符串
*
* @param data byte[]
* @param toDigits 用于控制输出的char[]
* @return 十六进制String
*/
protected static String encodeHexString(byte[] data, char[] toDigits) {
return new String(encodeHex(data, toDigits));
}
/**
* 将十六进制字符数组转换为字节数组
*
* @param data 十六进制char[]
* @return byte[]
* @throws RuntimeException 如果源十六进制字符数组是一个奇怪的长度将抛出运行时异常
*/
public static byte[] decodeHex(char[] data) {
int len = data.length;
if ((len & 0x01) != 0) {
throw new IllegalArgumentException("十六进制char[]不合法");
}
byte[] out = new byte[len >> 1];
// two characters form the hex value.
int j = 0;
for (int i = 0; j < len; i++) {
int f = toDigit(data[j], j) << 4;
j++;
f = f | toDigit(data[j], j);
j++;
out[i] = (byte) (f & 0xFF);
}
return out;
}
/**
* 将十六进制字符转换成一个整数
*
* @param ch 十六进制char
* @param index 十六进制字符在字符数组中的位置
* @return 一个整数
* @throws RuntimeException 当ch不是一个合法的十六进制字符时抛出运行时异常
*/
protected static int toDigit(char ch, int index) {
int digit = Character.digit(ch, 16);
if (digit == -1) {
throw new IllegalArgumentException("Illegal hexadecimal character " + ch + " at index " + index);
}
return digit;
}
/**
* 数字字符串转ASCII码字符串
*
* @param content 字符串
* @return ASCII字符串
*/
public static String stringToAsciiString(String content) {
StringBuilder result = new StringBuilder();
int max = content.length();
for (int i = 0; i < max; i++) {
char c = content.charAt(i);
String b = Integer.toHexString(c);
result.append(b);
}
return result.toString();
}
/**
* 十六进制转字符串
*
* @param hexString 十六进制字符串
* @param encodeType 编码类型4Unicode2普通编码
* @return 字符串
*/
public static String hexStringToString(String hexString, int encodeType) {
StringBuilder result = new StringBuilder();
int max = hexString.length() / encodeType;
for (int i = 0; i < max; i++) {
char c = (char) hexStringToAlgorism(hexString.substring(i * encodeType, (i + 1) * encodeType));
result.append(c);
}
return result.toString();
}
/**
* 十六进制字符串转换十进制
*
* @param hex 十六进制字符串
* @return 十进制数值
*/
public static int hexStringToAlgorism(String hex) {
hex = hex.toUpperCase();
int max = hex.length();
int result = 0;
for (int i = max; i > 0; i--) {
char c = hex.charAt(i - 1);
int algorithm;
if (c >= '0' && c <= '9') {
algorithm = c - '0';
} else {
algorithm = c - 55;
}
result += (int) (Math.pow(16, (max - i)) * algorithm);
}
return result;
}
/**
* 十六转二进制
*
* @param hex 十六进制字符串
* @return 二进制字符串
*/
public static String hexStringToBinary(String hex) {
hex = hex.toUpperCase();
StringBuilder result = new StringBuilder();
int max = hex.length();
for (int i = 0; i < max; i++) {
char c = hex.charAt(i);
switch (c) {
case '0':
result.append("0000");
break;
case '1':
result.append("0001");
break;
case '2':
result.append("0010");
break;
case '3':
result.append("0011");
break;
case '4':
result.append("0100");
break;
case '5':
result.append("0101");
break;
case '6':
result.append("0110");
break;
case '7':
result.append("0111");
break;
case '8':
result.append("1000");
break;
case '9':
result.append("1001");
break;
case 'A':
result.append("1010");
break;
case 'B':
result.append("1011");
break;
case 'C':
result.append("1100");
break;
case 'D':
result.append("1101");
break;
case 'E':
result.append("1110");
break;
case 'F':
result.append("1111");
break;
default:
logger.log(Level.WARNING, "hexStringToBinary无匹配项");
break;
}
}
return result.toString();
}
/**
* ASCII码字符串转数字字符串
*
* @param content ASCII字符串
* @return 字符串
*/
public static String asciiStringToString(String content) {
StringBuilder result = new StringBuilder();
int length = content.length() / 2;
for (int i = 0; i < length; i++) {
String c = content.substring(i * 2, i * 2 + 2);
int a = hexStringToAlgorism(c);
char b = (char) a;
String d = String.valueOf(b);
result.append(d);
}
return result.toString();
}
/**
* 将十进制转换为指定长度的十六进制字符串
*
* @param algorism int 十进制数字
* @param maxLength int 转换后的十六进制字符串长度
* @return String 转换后的十六进制字符串
*/
public static String algorismToHexString(int algorism, int maxLength) {
String result;
result = Integer.toHexString(algorism);
if (result.length() % 2 == 1) {
result = "0" + result;
}
return patchHexString(result.toUpperCase(), maxLength);
}
/**
* 字节数组转为普通字符串ASCII对应的字符
*
* @param bytearray byte[]
* @return String
*/
public static String byteToString(byte[] bytearray) {
StringBuilder result = new StringBuilder();
char temp;
for (byte b : bytearray) {
temp = (char) b;
result.append(temp);
}
return result.toString();
}
/**
* 二进制字符串转十进制
*
* @param binary 二进制字符串
* @return 十进制数值
*/
public static int binaryToAlgorism(String binary) {
int max = binary.length();
int result = 0;
for (int i = max; i > 0; i--) {
char c = binary.charAt(i - 1);
int algorism = c - '0';
result += (int) (Math.pow(2, (max - i)) * algorism);
}
return result;
}
/**
* 十进制转换为十六进制字符串
*
* @param algorism int 十进制的数字
* @return String 对应的十六进制字符串
*/
public static String algorismToHexString(int algorism) {
String result;
result = Integer.toHexString(algorism);
if (result.length() % 2 == 1) {
result = "0" + result;
}
result = result.toUpperCase();
return result;
}
/**
* HEX字符串前补0主要用于长度位数不足
*
* @param str String 需要补充长度的十六进制字符串
* @param maxLength int 补充后十六进制字符串的长度
* @return 补充结果
*/
public static String patchHexString(String str, int maxLength) {
StringBuilder temp = new StringBuilder();
for (int i = 0; i < maxLength - str.length(); i++) {
temp.insert(0, "0");
}
str = (temp + str).substring(0, maxLength);
return str;
}
/**
* 将一个字符串转换为int
*
* @param s String 要转换的字符串
* @param defaultInt int 如果出现异常,默认返回的数字
* @param radix int 要转换的字符串是什么进制的,如16 8 10.
* @return int 转换后的数字
*/
public static int parseToInt(String s, int defaultInt, int radix) {
int i;
try {
i = Integer.parseInt(s, radix);
} catch (NumberFormatException ex) {
i = defaultInt;
}
return i;
}
/**
* 将一个十进制形式的数字字符串转换为int
*
* @param s String 要转换的字符串
* @param defaultInt int 如果出现异常,默认返回的数字
* @return int 转换后的数字
*/
public static int parseToInt(String s, int defaultInt) {
int i;
try {
i = Integer.parseInt(s);
} catch (NumberFormatException ex) {
i = defaultInt;
}
return i;
}
/**
* 十六进制串转化为byte数组
*
* @return the array of byte
*/
public static byte[] hexToByte(String hex) throws IllegalArgumentException {
if (hex.length() % 2 != 0) {
throw new IllegalArgumentException();
}
char[] arr = hex.toCharArray();
byte[] b = new byte[hex.length() / 2];
for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {
String swap = String.valueOf(arr[i++]) + arr[i];
int byteInt = Integer.parseInt(swap, 16) & 0xFF;
b[j] = (byte) byteInt;
}
return b;
}
/**
* 字节数组转换为十六进制字符串
*
* @param b byte[] 需要转换的字节数组
* @return String 十六进制字符串
*/
public static String byteToHex(byte[] b) {
if (b == null) {
throw new IllegalArgumentException("Argument b ( byte array ) is null! ");
}
StringBuilder hs = new StringBuilder();
String stmp;
for (byte value : b) {
stmp = Integer.toHexString(value & 0xff);
if (stmp.length() == 1) {
hs.append("0").append(stmp);
} else {
hs.append(stmp);
}
}
return hs.toString().toUpperCase();
}
public static byte[] subByte(byte[] input, int startIndex, int length) {
byte[] bt = new byte[length];
System.arraycopy(input, startIndex, bt, 0, length);
return bt;
}
}