国密：SM2公私钥加签验签

Dear 丶 2024-03-30 10:55 38阅读 0赞

##  ##

## 一、工具类 ##

POM中增加hutool

<dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-core</artifactId>
                <version>5.6.5</version>
            </dependency>

package cn.test.encrypt.utils.sm2;
    /**
     * SM2签名所计算的值 可以根据实际情况增加删除字段属性
     */
    public class SM2SignVO {
    	//16进制的私钥
    	public String sm2_userd;
    	//椭圆曲线点X
    	public String x_coord;
    	//椭圆曲线点Y
    	public String y_coord;
    	//SM3摘要Z
    	public String sm3_z;
    	//明文数据16进制
    	public String sign_express;
    	//SM3摘要值
    	public String sm3_digest;
    	//R
    	public String sign_r;
    	//S
    	public String sign_s;
    	//R
    	public String verify_r;
    	//S
    	public String verify_s;
    	//签名值
    	public String sm2_sign;
    	//sign 签名  verfiy验签
    	public String sm2_type;
    	//是否验签成功  true false
    	public boolean isVerify;
    	public String getX_coord() {
    		return x_coord;
    	}
    	public void setX_coord(String x_coord) {
    		this.x_coord = x_coord;
    	}
    	public String getY_coord() {
    		return y_coord;
    	}
    	public void setY_coord(String y_coord) {
    		this.y_coord = y_coord;
    	}
    	public String getSm3_z() {
    		return sm3_z;
    	}
    	public void setSm3_z(String sm3_z) {
    		this.sm3_z = sm3_z;
    	}
    	public String getSm3_digest() {
    		return sm3_digest;
    	}
    	public void setSm3_digest(String sm3_digest) {
    		this.sm3_digest = sm3_digest;
    	}
    	public String getSm2_signForSoft() {
    		return sm2_sign;
    	}
    	public String getSm2_signForHard() {
    		//System.out.println("R:"+getSign_r());
    		//System.out.println("s:"+getSign_s());
    		return getSign_r()+getSign_s();
    	}
    	public void setSm2_sign(String sm2_sign) {
    		this.sm2_sign = sm2_sign;
    	}
    	public String getSign_express() {
    		return sign_express;
    	}
    	public void setSign_express(String sign_express) {
    		this.sign_express = sign_express;
    	}
    	public String getSm2_userd() {
    		return sm2_userd;
    	}
    	public void setSm2_userd(String sm2_userd) {
    		this.sm2_userd = sm2_userd;
    	}
    	public String getSm2_type() {
    		return sm2_type;
    	}
    	public void setSm2_type(String sm2_type) {
    		this.sm2_type = sm2_type;
    	}
    	public boolean isVerify() {
    		return isVerify;
    	}
    	public void setVerify(boolean isVerify) {
    		this.isVerify = isVerify;
    	}
    	public String getSign_r() {
    		return sign_r;
    	}
    	public void setSign_r(String sign_r) {
    		this.sign_r = sign_r;
    	}
    	public String getSign_s() {
    		return sign_s;
    	}
    	public void setSign_s(String sign_s) {
    		this.sign_s = sign_s;
    	}
    	public String getVerify_r() {
    		return verify_r;
    	}
    	public void setVerify_r(String verify_r) {
    		this.verify_r = verify_r;
    	}
    	public String getVerify_s() {
    		return verify_s;
    	}
    	public void setVerify_s(String verify_s) {
    		this.verify_s = verify_s;
    	}
    }

package cn.test.encrypt.utils.sm2;
    
    import org.bouncycastle.math.ec.ECPoint;
    
    import java.math.BigInteger;
    
    /**
     * SM2
     */
    public class SM2Result {
    	public SM2Result() {
    	}
    	// 签名r
    	public BigInteger r;
    	public BigInteger s;
    	//验签R
    	public BigInteger R;
    
    	// 密钥交换
    	public byte[] sa;
    	public byte[] sb;
    	public byte[] s1;
    	public byte[] s2;
    
    	public ECPoint keyra;
    	public ECPoint keyrb;
    	
    }

package cn.test.encrypt.utils.sm2;
    
    import cn.test.encrypt.utils.Util;
    import org.bouncycastle.asn1.*;
    import org.bouncycastle.crypto.digests.SM3Digest;
    import org.bouncycastle.math.ec.ECPoint;
    
    import java.io.ByteArrayInputStream;
    import java.math.BigInteger;
    import java.util.Enumeration;
    
    /**
     * 国密算法的签名、验签
     */
    public class SM2SignVerUtils {
    	/**
    	 * 默认USERID
    	 */
    	public static String USER_ID = "1234567812345678";
    	/**
    	 * 私钥签名
    	 * 使用SM3进行对明文数据计算一个摘要值
    	 * @param privatekey 私钥
    	 * @param sourceData 明文数据
    	 * @return 签名后的值
    	 * @throws Exception
    	 */
    	public static SM2SignVO Sign2SM2(byte[] privatekey,byte[] sourceData) throws Exception{
    		SM2SignVO sm2SignVO = new SM2SignVO();
    		sm2SignVO.setSm2_type("sign");
    		SM2Factory factory = SM2Factory.getInstance();
    		BigInteger userD = new  BigInteger(privatekey);
    		//System.out.println("userD:"+userD.toString(16));
    		sm2SignVO.setSm2_userd(userD.toString(16));
    		ECPoint userKey = factory.ecc_point_g.multiply(userD);
    		//System.out.println("椭圆曲线点X: "+ userKey.getXCoord().toBigInteger().toString(16));
    		//System.out.println("椭圆曲线点Y: "+ userKey.getYCoord().toBigInteger().toString(16));
    		SM3Digest sm3Digest = new SM3Digest();
    		byte [] z = factory.sm2GetZ(USER_ID.getBytes(), userKey);
    		//System.out.println("加签SM3摘要Z: " + Util.getHexString(z));
    		//System.out.println("被加密数据的16进制: " + Util.getHexString(sourceData));
    		sm2SignVO.setSm3_z(Util.getHexString(z));
    		sm2SignVO.setSign_express(Util.getHexString(sourceData));
    
    		sm3Digest.update(z, 0, z.length);
    		sm3Digest.update(sourceData,0,sourceData.length);
    		byte [] md = new byte[32];
    		sm3Digest.doFinal(md, 0);
    		//System.out.println("SM3摘要值: " + Util.getHexString(md));
    		sm2SignVO.setSm3_digest(Util.getHexString(md));
    
    		SM2Result sm2Result = new SM2Result();
    		factory.sm2Sign(md, userD, userKey, sm2Result);
    		//System.out.println("r: " + sm2Result.r.toString(16));
    		//System.out.println("s: " + sm2Result.s.toString(16));
    		sm2SignVO.setSign_r(sm2Result.r.toString(16));
    		sm2SignVO.setSign_s(sm2Result.s.toString(16));
    
    		ASN1Integer d_r = new ASN1Integer(sm2Result.r);
    		ASN1Integer d_s = new ASN1Integer(sm2Result.s);
    		ASN1EncodableVector v2 = new ASN1EncodableVector();
    		v2.add(d_r);
    		v2.add(d_s);
    		DERSequence sign = new DERSequence(v2);
    		String result = Util.byteToHex(sign.getEncoded());
    		sm2SignVO.setSm2_sign(result);
    		return sm2SignVO;
    	}
    	/**
    	 * 验证签名
    	 * @param publicKey 公钥信息
    	 * @param sourceData 密文信息
    	 * @param signData 签名信息
    	 * @return 验签的对象 包含了相关参数和验签结果
    	 */
    	@SuppressWarnings("unchecked")
    	public static SM2SignVO VerifySignSM2(byte[] publicKey,byte[] sourceData,byte[] signData){
    		try {
    			byte[] formatedPubKey;
    			SM2SignVO verifyVo = new SM2SignVO();
    			verifyVo.setSm2_type("verify");
    			if (publicKey.length == 64) {
    				// 添加一字节标识，用于ECPoint解析
    				formatedPubKey = new byte[65];
    				formatedPubKey[0] = 0x04;
    				System.arraycopy(publicKey, 0, formatedPubKey, 1, publicKey.length);
    			} else{
    				formatedPubKey = publicKey;
    			}
    			SM2Factory factory = SM2Factory.getInstance();
    			ECPoint userKey = factory.ecc_curve.decodePoint(formatedPubKey);
    			SM3Digest sm3Digest = new SM3Digest();
    			byte [] z = factory.sm2GetZ(USER_ID.getBytes(), userKey);
    			System.out.println("SM3摘要Z: " + Util.getHexString(z));
    
    
    			verifyVo.setSm3_z(Util.getHexString(z));
    
    			sm3Digest.update(z,0,z.length);
    			sm3Digest.update(sourceData,0,sourceData.length);
    			byte [] md = new byte[32];
    			sm3Digest.doFinal(md, 0);
    			System.out.println("SM3摘要值: " + Util.getHexString(md));
    
    
    			verifyVo.setSm3_digest(Util.getHexString(md));
    			ByteArrayInputStream bis = new ByteArrayInputStream(signData);
    			ASN1InputStream dis = new ASN1InputStream(bis);
    			SM2Result sm2Result = null;
    			ASN1Primitive derObj = dis.readObject();
    			Enumeration<ASN1Integer> e = ((ASN1Sequence)derObj).getObjects();
    			BigInteger r = ((ASN1Integer) e.nextElement()).getValue();
    			BigInteger s = ((ASN1Integer) e.nextElement()).getValue();
    			sm2Result = new SM2Result();
    			sm2Result.r = r;
    			sm2Result.s = s;
    			//System.out.println("vr: " + sm2Result.r.toString(16));
    			//System.out.println("vs: " + sm2Result.s.toString(16));
    			verifyVo.setVerify_r(sm2Result.r.toString(16));
    			verifyVo.setVerify_s(sm2Result.s.toString(16));
    			factory.sm2Verify(md, userKey, sm2Result.r, sm2Result.s, sm2Result);
    			boolean verifyFlag = sm2Result.r.equals(sm2Result.R);
    			verifyVo.setVerify(verifyFlag);
    			return  verifyVo;
    		} catch (IllegalArgumentException e) {
    			return null;
    		}catch (Exception e) {
    			e.printStackTrace();
    			return null;
    		}
    	}
    	
    }

工具类

package cn.test.encrypt.utils;
    
    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;
        }
    }

##  ##

## 测试Demo ##

public static void main(String[] args) throws Exception {
            String req = "123456";
            String toHex = Convert.toHex(req, CharsetUtil.CHARSET_UTF_8);
            String appPubKey = "0411d9bb4605afe2b652effe75ee1d75a5bcdfec7f4bf3e59a4e79736176c09906a7d3bb8a275111f8669f09f7f38249d05caedf43309fd7584e786774b2066d0f";
            String appPriKey ="12d39a6f96885dab71cf12392a8d497981101b32729dcf89904253661cd8ba4f";
            SM2SignVO sm2SignVO = SM2SignVerUtils.Sign2SM2(Util.hexStringToBytes(appPriKey), toHex.getBytes());
            System.out.println("签名是："+sm2SignVO.sm2_sign);
            SM2SignVO verify = SM2SignVerUtils.VerifySignSM2(Util.hexStringToBytes(appPubKey), toHex.getBytes(), Util.hexToByte(sm2SignVO.sm2_sign));
            System.out.println("结果："+verify.isVerify);
    
    
    
        }

## 注意： ##

加签逻辑中要用SM3计算摘要，对于工具类中的计算逻辑 在如图所示位置

![0d3e4cc873844a8c869dbbb8cd079d5f.png][]

![ae157d916ea64b56a480956ad2cb2cb8.png][]

工具类加签验签计算摘要逻辑一致，可以验签，若和第三方对接需要调整逻辑！！！

[0d3e4cc873844a8c869dbbb8cd079d5f.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/2d81538a79424b0a89a6cf55c6bc8c6e.png
[ae157d916ea64b56a480956ad2cb2cb8.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/08e244650a784f9196d3705a216d7261.png