package org.sxkj.common.utils.jym;
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import org.bouncycastle.asn1.*;
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import org.bouncycastle.crypto.digests.SM3Digest;
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import org.bouncycastle.math.ec.ECPoint;
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import org.sxkj.common.utils.sm3.SM3;
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import java.io.ByteArrayInputStream;
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import java.math.BigInteger;
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import java.util.Enumeration;
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public class SM2SignVerUtils {
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public static String USER_ID = "1234567812345678";
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public SM2SignVerUtils() {
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}
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public static SM2SignVO Sign2SM2(byte[] privatekey, byte[] sourceData) throws Exception {
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SM2SignVO sm2SignVO = new SM2SignVO();
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sm2SignVO.setSm2_type("sign");
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SM2Factory factory = SM2Factory.getInstance();
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BigInteger userD = new BigInteger(1, privatekey);
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sm2SignVO.setSm2_userd(userD.toString(16));
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ECPoint userKey = factory.ecc_point_g.multiply(userD);
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SM3Digest sm3Digest = new SM3Digest();
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byte[] z = factory.sm2GetZ(USER_ID.getBytes(), userKey);
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sm2SignVO.setSm3_z(Util.getHexString(z));
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sm2SignVO.setSign_express(Util.getHexString(sourceData));
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sm3Digest.update(z, 0, z.length);
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sm3Digest.update(sourceData, 0, sourceData.length);
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byte[] md = new byte[32];
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sm3Digest.doFinal(md, 0);
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sm2SignVO.setSm3_digest(Util.getHexString(md));
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SM2Result sm2Result = new SM2Result();
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factory.sm2Sign(md, userD, userKey, sm2Result);
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sm2SignVO.setSign_r(sm2Result.r.toString(16));
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sm2SignVO.setSign_s(sm2Result.s.toString(16));
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ASN1Integer d_r = new ASN1Integer(sm2Result.r);
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ASN1Integer d_s = new ASN1Integer(sm2Result.s);
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ASN1EncodableVector v2 = new ASN1EncodableVector();
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v2.add(d_r);
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v2.add(d_s);
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DERSequence sign = new DERSequence(v2);
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String result = Util.byteToHex(sign.getEncoded());
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sm2SignVO.setSm2_sign(result);
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return sm2SignVO;
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}
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public static SM2SignVO VerifySignSM2(byte[] publicKey, byte[] sourceData, byte[] signData) {
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try {
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SM2SignVO verifyVo = new SM2SignVO();
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verifyVo.setSm2_type("verify");
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byte[] formatedPubKey;
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if (publicKey.length == 64) {
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formatedPubKey = new byte[65];
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formatedPubKey[0] = 4;
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System.arraycopy(publicKey, 0, formatedPubKey, 1, publicKey.length);
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} else {
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formatedPubKey = publicKey;
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}
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SM2Factory factory = SM2Factory.getInstance();
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ECPoint userKey = factory.ecc_curve.decodePoint(formatedPubKey);
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SM3Digest sm3Digest = new SM3Digest();
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byte[] z = factory.sm2GetZ(USER_ID.getBytes(), userKey);
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verifyVo.setSm3_z(Util.getHexString(z));
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sm3Digest.update(z, 0, z.length);
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sm3Digest.update(sourceData, 0, sourceData.length);
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byte[] md = new byte[32];
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sm3Digest.doFinal(md, 0);
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verifyVo.setSm3_digest(Util.getHexString(md));
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ByteArrayInputStream bis = new ByteArrayInputStream(signData);
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ASN1InputStream dis = new ASN1InputStream(bis);
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SM2Result sm2Result = null;
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ASN1Primitive derObj = dis.readObject();
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Enumeration<ASN1Integer> e = ((ASN1Sequence)derObj).getObjects();
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BigInteger r = ((ASN1Integer)e.nextElement()).getValue();
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BigInteger s = ((ASN1Integer)e.nextElement()).getValue();
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sm2Result = new SM2Result();
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sm2Result.r = r;
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sm2Result.s = s;
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verifyVo.setVerify_r(sm2Result.r.toString(16));
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verifyVo.setVerify_s(sm2Result.s.toString(16));
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factory.sm2Verify(md, userKey, sm2Result.r, sm2Result.s, sm2Result);
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boolean verifyFlag = sm2Result.r.equals(sm2Result.R);
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verifyVo.setVerify(verifyFlag);
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return verifyVo;
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} catch (IllegalArgumentException var18) {
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return null;
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} catch (Exception var19) {
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var19.printStackTrace();
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return null;
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}
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}
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}
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