GitHub - xjfuuu/SM2_SM3_SM4Encrypt: 基于Java语言的国密SM2/SM3/SM4算法库 , 包含加密/解密、签名/验签、摘要算法的实现代码和测试方法 。
build.gradle
implementation 'cn.hutool:hutool-all:5.8.4'
SM4 .java import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; public class SM4 { public static final int SM4_ENCRYPT = 1; public static final int SM4_DECRYPT = 0; private long GET_ULONG_BE(byte[] b, int i) { long n = (long) (b[i] & 0xff) << 24 | (long) ((b[i + 1] & 0xff) << 16) | (long) ((b[i + 2] & 0xff) << 8) | (long) (b[i + 3] & 0xff) & 0xffffffffL; return n; } private void PUT_ULONG_BE(long n, byte[] b, int i) { b[i] = (byte) (int) (0xFF & n >> 24); b[i + 1] = (byte) (int) (0xFF & n >> 16); b[i + 2] = (byte) (int) (0xFF & n >> 8); b[i + 3] = (byte) (int) (0xFF & n); } private long SHL(long x, int n) { return (x & 0xFFFFFFFF) << n; } private long ROTL(long x, int n) { return SHL(x, n) | x >> (32 - n); } private void SWAP(long[] sk, int i) { long t = sk[i]; sk[i] = sk[(31 - i)]; sk[(31 - i)] = t; } public static final byte[] SboxTable = {(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}; public static final int[] FK = {0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc}; public 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; byte retVal = SboxTable[i]; return retVal; } private long sm4Lt(long ka) { long bb = 0L; long c = 0L; byte[] a = new byte[4]; byte[] b = new byte[4]; PUT_ULONG_BE(ka, a, 0); b[0] = sm4Sbox(a[0]); b[1] = sm4Sbox(a[1]); b[2] = sm4Sbox(a[2]); b[3] = sm4Sbox(a[3]); bb = GET_ULONG_BE(b, 0); c = bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24); return c; } private long sm4F(long x0, long x1, long x2, long x3, long rk) { return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk); } private long sm4CalciRK(long ka) { long bb = 0L; long rk = 0L; byte[] a = new byte[4]; byte[] b = new byte[4]; PUT_ULONG_BE(ka, a, 0); b[0] = sm4Sbox(a[0]); b[1] = sm4Sbox(a[1]); b[2] = sm4Sbox(a[2]); b[3] = sm4Sbox(a[3]); bb = GET_ULONG_BE(b, 0); rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23); return rk; } private void sm4_setkey(long[] SK, byte[] key) { long[] MK = new long[4]; long[] k = new long[36]; int i = 0; MK[0] = GET_ULONG_BE(key, 0); MK[1] = GET_ULONG_BE(key, 4); MK[2] = GET_ULONG_BE(key, 8); MK[3] = GET_ULONG_BE(key, 12); k[0] = MK[0] ^ (long) FK[0]; k[1] = MK[1] ^ (long) FK[1]; k[2] = MK[2] ^ (long) FK[2]; k[3] = MK[3] ^ (long) FK[3]; for (; i < 32; i++) { k[(i + 4)] = (k[i] ^ sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ (long) CK[i])); SK[i] = k[(i + 4)]; } } private void sm4_one_round(long[] sk, byte[] input, byte[] output) { int i = 0; long[] ulbuf = new long[36]; ulbuf[0] = GET_ULONG_BE(input, 0); ulbuf[1] = GET_ULONG_BE(input, 4); ulbuf[2] = GET_ULONG_BE(input, 8); ulbuf[3] = GET_ULONG_BE(input, 12); while (i < 32) { ulbuf[(i + 4)] = sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]); i++; } PUT_ULONG_BE(ulbuf[35], output, 0); PUT_ULONG_BE(ulbuf[34], output, 4); PUT_ULONG_BE(ulbuf[33], output, 8); PUT_ULONG_BE(ulbuf[32], output, 12); } //修改了填充模式,为模式 private byte[] padding(byte[] input, int mode) { if (input == null) { return null; } byte[] ret = (byte[]) null; if (mode == SM4_ENCRYPT) { //填充:hex必须是32的整数倍填充 ,填充的是80 00 00 00 int p = 16 - input.length % 16; String inputHex = Util.byteToHex(input)+ "80"; StringBuffer stringBuffer =new StringBuffer(inputHex); for (int i = 0; i <p-1 ; i++) { stringBuffer.append("00"); } ret= Util.hexToByte(stringBuffer.toString()); //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) '�'; }*/ } else { /*int p = input[input.length - 1]; ret = new byte[input.length - p]; System.arraycopy(input, 0, ret, 0, input.length - p);*/ String inputHex =Util.byteToHex(input); int i = inputHex.lastIndexOf("80"); // String substring = inputHex.substring(0, i); ret= Util.hexToByte(inputHex); } return ret; } public void sm4_setkey_enc(SM4_Context ctx, byte[] key) throws Exception { if (ctx == null) { throw new Exception("ctx is null!"); } if (key == null || key.length != 16) { throw new Exception("key error!"); } ctx.mode = SM4_ENCRYPT; sm4_setkey(ctx.sk, key); } public void sm4_setkey_dec(SM4_Context ctx, byte[] key) throws Exception { if (ctx == null) { throw new Exception("ctx is null!"); } if (key == null || key.length != 16) { throw new Exception("key error!"); } int i = 0; ctx.mode = SM4_DECRYPT; sm4_setkey(ctx.sk, key); for (i = 0; i < 16; i++) { SWAP(ctx.sk, i); } } public byte[] sm4_crypt_ecb(SM4_Context ctx, byte[] input) throws Exception { if (input == null) { throw new Exception("input is null!"); } 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); sm4_one_round(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 byte[] sm4_crypt_cbc(SM4_Context ctx, byte[] iv, byte[] input) throws Exception { if (iv == null || iv.length != 16) { throw new Exception("iv error!"); } if (input == null) { throw new Exception("input is null!"); } if (ctx.isPadding && ctx.mode == SM4_ENCRYPT) { input = padding(input, SM4_ENCRYPT); } int i = 0; 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])); } sm4_one_round(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); sm4_one_round(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; } }
SM4_Context.java public class SM4_Context { public int mode; public long[] sk; public boolean isPadding; public SM4_Context() { this.mode = 1; this.isPadding = true; this.sk = new long[32]; } }
SM4Utils.java import org.apaches.commons.codec.binary.Base64; //可以使用Android 自带Base64 import java.io.IOException; import java.util.regex.Matcher; import java.util.regex.Pattern; import cn.hutool.core.convert.Convert; public class SM4Utils { // private String secretKey = ""; // private String iv = ""; // private boolean hexString = false; public String secretKey = ""; public String iv = ""; public boolean hexString = false; public SM4Utils() { } //对称秘钥加密(ECB) public static String SM4EncForECB(String key,String text) { SM4Utils sm4 = new SM4Utils(); sm4.secretKey = key; sm4.hexString = true; String cipherText = sm4.encryptData_ECB(text); return cipherText; } //对称秘钥解密(ECB) public static String SM4DecForECB(String key,String text) { SM4Utils sm4 = new SM4Utils(); sm4.secretKey = key; sm4.hexString = true; String plainText = sm4.decryptData_ECB(text); return plainText; } public String encryptData_ECB(String plainText) { try { SM4_Context ctx = new SM4_Context(); ctx.isPadding = true; ctx.mode = SM4.SM4_ENCRYPT; byte[] keyBytes; if (hexString) { keyBytes = Util.hexStringToBytes(secretKey); } else { //keyBytes = secretKey.getBytes(); keyBytes = Util.hexStringToBytes(secretKey); } SM4 sm4 = new SM4(); sm4.sm4_setkey_enc(ctx, keyBytes);
byte[] encrypted = sm4.sm4_crypt_ecb(ctx,Util.hexStringToBytes( plainText)); return Convert.toHex(encrypted); } catch (Exception e) { e.printStackTrace(); return null; } } public String decryptData_ECB(String cipherText) { try { byte[] encrypted = Util.hexToByte(cipherText); cipherText= Base64.encodeBase64String(encrypted);; //cipherText = new BASE64Encoder().encode(encrypted); if (cipherText != null && cipherText.trim().length() > 0) { Pattern p = Pattern.compile("\\s*|\t|\r|\n"); Matcher m = p.matcher(cipherText); cipherText = m.replaceAll(""); } SM4_Context ctx = new SM4_Context(); ctx.isPadding = true; ctx.mode = SM4.SM4_DECRYPT; byte[] keyBytes; if (hexString) { keyBytes = Util.hexStringToBytes(secretKey); } else { keyBytes = secretKey.getBytes(); } SM4 sm4 = new SM4(); sm4.sm4_setkey_dec(ctx, keyBytes); byte[] decrypted = sm4.sm4_crypt_ecb(ctx, Base64.decodeBase64(cipherText)); //byte[] decrypted = sm4.sm4_crypt_ecb(ctx, new BASE64Decoder().decodeBuffer(cipherText)); // return new String(decrypted, "GBK"); return Convert.toHex(decrypted); } catch (Exception e) { e.printStackTrace(); return null; } } public String encryptData_CBC(String plainText) { try { SM4_Context ctx = new SM4_Context(); ctx.isPadding = true; ctx.mode = SM4.SM4_ENCRYPT; byte[] keyBytes; byte[] ivBytes; if (hexString) { keyBytes = Util.hexStringToBytes(secretKey); ivBytes = Util.hexStringToBytes(iv); } else { keyBytes = secretKey.getBytes(); ivBytes = iv.getBytes(); } SM4 sm4 = new SM4(); sm4.sm4_setkey_enc(ctx, keyBytes); byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, plainText.getBytes("UTF-8")); return Util.byteToHex(encrypted); } catch (Exception e) { e.printStackTrace(); return null; } } public String decryptData_CBC(String cipherText) { try { byte[] encrypted = Util.hexToByte(cipherText); cipherText=Base64.encodeBase64String(encrypted);; //cipherText = new BASE64Encoder().encode(encrypted); if (cipherText != null && cipherText.trim().length() > 0) { Pattern p = Pattern.compile("\\s*|\t|\r|\n"); Matcher m = p.matcher(cipherText); cipherText = m.replaceAll(""); } SM4_Context ctx = new SM4_Context(); ctx.isPadding = true; ctx.mode = SM4.SM4_DECRYPT; byte[] keyBytes; byte[] ivBytes; if (hexString) { keyBytes = Util.hexStringToBytes(secretKey); ivBytes = Util.hexStringToBytes(iv); } else { keyBytes = secretKey.getBytes(); ivBytes = iv.getBytes(); } SM4 sm4 = new SM4(); sm4.sm4_setkey_dec(ctx, keyBytes); //byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, new BASE64Decoder().decodeBuffer(cipherText)); byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, Base64.decodeBase64(cipherText)); /*String text = new String(decrypted, "UTF-8"); return text.substring(0,text.length()-1);*/ return new String(decrypted, "UTF-8"); } catch (Exception e) { e.printStackTrace(); return null; } } public static void main(String[] args) throws IOException { String plainText = "I Love You Every Day"; String s = Util.byteToHex(plainText.getBytes()); System.out.println("原文" + s); SM4Utils sm4 = new SM4Utils(); //sm4.secretKey = "JeF8U9wHFOMfs2Y8"; sm4.secretKey = "64EC7C763AB7BF64E2D75FF83A319918"; sm4.hexString = true; System.out.println("ECB模式加密"); String cipherText = sm4.encryptData_ECB(plainText); System.out.println("密文: " + cipherText); System.out.println(""); String plainText2 = sm4.decryptData_ECB(cipherText); System.out.println("明文: " + plainText2); System.out.println(""); System.out.println("CBC模式加密"); sm4.iv = "31313131313131313131313131313131"; String cipherText2 = sm4.encryptData_CBC(plainText); System.out.println("加密密文: " + cipherText2); System.out.println(""); String plainText3 = sm4.decryptData_CBC(cipherText2); System.out.println("解密明文: " + plainText3); } }
Util.java
import java.math.BigInteger; public class Util { /** * 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 >> 0)); 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])) << 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 * @return */ public static byte[] byteConvert32Bytes(BigInteger n) { byte tmpd[] = (byte[]) null; if (n == null) { return null; } if (n.toByteArray().length == 33) { tmpd = new byte[32]; System.arraycopy(n.toByteArray(), 1, tmpd, 0, 32); } else if (n.toByteArray().length == 32) { tmpd = n.toByteArray(); } else { tmpd = new byte[32]; for (int i = 0; i < 32 - n.toByteArray().length; i++) { tmpd[i] = 0; } System.arraycopy(n.toByteArray(), 0, tmpd, 32 - n.toByteArray().length, n.toByteArray().length); } return tmpd; } /** * 换字节流(字节数组)型数据转大数字 * * @param b * @return */ 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 * @return */ 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 * @param upperCase * @return */ public static String getHexString(byte[] bytes, boolean upperCase) { String ret = ""; for (int i = 0; i < bytes.length; i++) { ret += Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1); } return upperCase ? ret.toUpperCase() : ret; } /** * 打印十六进制字符串 * * @param bytes */ public static void printHexString(byte[] bytes) { for (int i = 0; i < bytes.length; i++) { String hex = Integer.toHexString(bytes[i] & 0xFF); if (hex.length() == 1) { hex = '0' + hex; } System.out.print("0x" + hex.toUpperCase() + ","); } System.out.println(""); } /** * Convert hex string to byte[] * * @param hexString the hex string * @return byte[] */ public static byte[] hexStringToBytes(String hexString) { if (hexString == null || hexString.equals("")) { 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])); } 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. for (int i = 0, j = 0; i < l; i++) { out[j++] = toDigits[(0xF0 & data[i]) >>> 4]; out[j++] = toDigits[0x0F & data[i]]; } 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 RuntimeException("Odd number of characters."); } byte[] out = new byte[len >> 1]; // two characters form the hex value. for (int i = 0, j = 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 RuntimeException("Illegal hexadecimal character " + ch + " at index " + index); } return digit; } /** * 数字字符串转ASCII码字符串 * * @param String 字符串 * @return ASCII字符串 */ public static String StringToAsciiString(String content) { String result = ""; int max = content.length(); for (int i = 0; i < max; i++) { char c = content.charAt(i); String b = Integer.toHexString(c); result = result + b; } return result; } /** * 十六进制转字符串 * * @param hexString 十六进制字符串 * @param encodeType 编码类型4:Unicode,2:普通编码 * @return 字符串 */ public static String hexStringToString(String hexString, int encodeType) { String result = ""; int max = hexString.length() / encodeType; for (int i = 0; i < max; i++) { char c = (char) hexStringToAlgorism(hexString .substring(i * encodeType, (i + 1) * encodeType)); result += c; } return result; } /** * 十六进制字符串装十进制 * * @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 algorism = 0; if (c >= '0' && c <= '9') { algorism = c - '0'; } else { algorism = c - 55; } result += Math.pow(16, max - i) * algorism; } 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(); String result = ""; int max = hex.length(); for (int i = 0; i < max; i++) { char c = hex.charAt(i); switch (c) { case '0': result += "0000"; break; case '1': result += "0001"; break; case '2': result += "0010"; break; case '3': result += "0011"; break; case '4': result += "0100"; break; case '5': result += "0101"; break; case '6': result += "0110"; break; case '7': result += "0111"; break; case '8': result += "1000"; break; case '9': result += "1001"; break; case 'A': result += "1010"; break; case 'B': result += "1011"; break; case 'C': result += "1100"; break; case 'D': result += "1101"; break; case 'E': result += "1110"; break; case 'F': result += "1111"; break; } } return result; } /** * ASCII码字符串转数字字符串 * * @param String ASCII字符串 * @return 字符串 */ public static String AsciiStringToString(String content) { String result = ""; 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 += d; } return result; } /** * 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) { String result = ""; char temp; int length = bytearray.length; for (int i = 0; i < length; i++) { temp = (char) bytearray[i]; result += temp; } return result; } /** * 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 += 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 */ static public String patchHexString(String str, int maxLength) { String temp = ""; for (int i = 0; i < maxLength - str.length(); i++) { temp = "0" + temp; } 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 = 0; 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 = 0; 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 = "" + arr[i++] + arr[i]; int byteint = Integer.parseInt(swap, 16) & 0xFF; b[j] = new Integer(byteint).byteValue(); } 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! "); } String hs = ""; String stmp = ""; for (int n = 0; n < b.length; n++) { stmp = Integer.toHexString(b[n] & 0xff); if (stmp.length() == 1) { hs = hs + "0" + stmp; } else { hs = hs + stmp; } } return hs.toLowerCase(); //return hs.toUpperCase(); } public static byte[] subByte(byte[] input, int startIndex, int length) { byte[] bt = new byte[length]; for (int i = 0; i < length; i++) { bt[i] = input[i + startIndex]; } return bt; } }
// data====>>f37001efea05a44067fc45ba3cc0fd5d // key====>>CE31B0C2D38034706861B0AE86CE91D0 //posKey ====>> dfca51f513b66ac2b9172d1ec7de1ee0 // String posKey = SM4Utils.SM4DecForECB(key,data); System.out.println("ECB解密结果posKey ====>>"+ posKey);