com.founder.mip.utils.EasyGmUtils Maven / Gradle / Ivy
package com.founder.mip.utils;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.gm.GMNamedCurves;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPrivateKey;
import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPublicKey;
import org.bouncycastle.jcajce.spec.SM2ParameterSpec;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.jce.spec.ECParameterSpec;
import org.bouncycastle.jce.spec.ECPrivateKeySpec;
import org.bouncycastle.jce.spec.ECPublicKeySpec;
import org.bouncycastle.util.BigIntegers;
import org.bouncycastle.util.encoders.Hex;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.io.IOException;
import java.math.BigInteger;
import java.security.*;
import java.util.Arrays;
/**
* @Author: fuchengmu
* @Date: 2019-10-05 14:58
*
* 用BC的注意点：
* 这个版本的BC对SM3withSM2的结果为asn1格式的r和s，如果需要直接拼接的r||s需要自己转换。下面rsAsn1ToPlainByteArray、rsPlainByteArrayToAsn1就在干这事。
* 这个版本的BC对SM2的结果为C1||C2||C3，据说为旧标准，新标准为C1||C3||C2，用新标准的需要自己转换。下面changeC1C2C3ToC1C3C2、changeC1C3C2ToC1C2C3就在干这事。
*/
public class EasyGmUtils {
private static X9ECParameters x9ECParameters = GMNamedCurves.getByName("sm2p256v1");
private static ECDomainParameters ecDomainParameters = new ECDomainParameters(x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN());
private static ECParameterSpec ecParameterSpec = new ECParameterSpec(x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN());
public static byte[] signSm3WithSm2(byte[] msg, byte[] userId, byte[] privateKeyBytes) {
BCECPrivateKey bcecPrivateKey = getPrivatekeyFromD(BigIntegers.fromUnsignedByteArray(privateKeyBytes));
return signSm3WithSm2(msg, userId, bcecPrivateKey);
}
/**
* @param msg
* @param userId
* @param privateKey
* @return r||s，直接拼接byte数组的rs
*/
public static byte[] signSm3WithSm2(byte[] msg, byte[] userId, PrivateKey privateKey) {
return rsAsn1ToPlainByteArray(signSm3WithSm2Asn1Rs(msg, userId, privateKey));
}
/**
* @param msg
* @param userId
* @param privateKey
* @return rs in asn1 format
*/
public static byte[] signSm3WithSm2Asn1Rs(byte[] msg, byte[] userId, PrivateKey privateKey) {
try {
SM2ParameterSpec parameterSpec = new SM2ParameterSpec(userId);
Signature signer = BCUtils.getSignature("SM3withSM2");
// signer.setParameter(parameterSpec);
signer.initSign(privateKey, new SecureRandom());
signer.update(msg, 0, msg.length);
byte[] sig = signer.sign();
return sig;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static boolean verifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, byte[] publicKeyBytes) {
if (publicKeyBytes.length != 64 && publicKeyBytes.length != 65) throw new RuntimeException("err key length");
BigInteger x, y;
if (publicKeyBytes.length > 64) {
x = BigIntegers.fromUnsignedByteArray(publicKeyBytes, 1, 32);
y = BigIntegers.fromUnsignedByteArray(publicKeyBytes, 33, 32);
} else {
x = BigIntegers.fromUnsignedByteArray(publicKeyBytes, 0, 32);
y = BigIntegers.fromUnsignedByteArray(publicKeyBytes, 32, 32);
}
BCECPublicKey bcecPublicKey = getPublickeyFromXY(x, y);
return verifySm3WithSm2(msg, userId, rs, bcecPublicKey);
}
/**
* @param msg
* @param userId
* @param rs r||s，直接拼接byte数组的rs
* @param publicKey
* @return
*/
public static boolean verifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, PublicKey publicKey) {
return verifySm3WithSm2Asn1Rs(msg, userId, rsPlainByteArrayToAsn1(rs), publicKey);
}
/**
* @param msg
* @param userId
* @param rs in asn1 format
* @param publicKey
* @return
*/
public static boolean verifySm3WithSm2Asn1Rs(byte[] msg, byte[] userId, byte[] rs, PublicKey publicKey) {
try {
Signature verifier = BCUtils.getSignature("SM3withSM2");
// verifier.setParameter(parameterSpec);
verifier.initVerify(publicKey);
verifier.update(msg, 0, msg.length);
return verifier.verify(rs);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* bc加解密使用旧标c1||c2||c3，此方法在加密后调用，将结果转化为c1||c3||c2
*
* @param c1c2c3
* @return
*/
private static byte[] changeC1C2C3ToC1C3C2(byte[] c1c2c3) {
final int c1Len = (x9ECParameters.getCurve().getFieldSize() + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
final int c3Len = 32; //new SM3Digest().getDigestSize();
byte[] result = new byte[c1c2c3.length];
System.arraycopy(c1c2c3, 0, result, 0, c1Len); //c1
System.arraycopy(c1c2c3, c1c2c3.length - c3Len, result, c1Len, c3Len); //c3
System.arraycopy(c1c2c3, c1Len, result, c1Len + c3Len, c1c2c3.length - c1Len - c3Len); //c2
return result;
}
/**
* bc加解密使用旧标c1||c3||c2，此方法在解密前调用，将密文转化为c1||c2||c3再去解密
*
* @param c1c3c2
* @return
*/
private static byte[] changeC1C3C2ToC1C2C3(byte[] c1c3c2) {
final int c1Len = (x9ECParameters.getCurve().getFieldSize() + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
final int c3Len = 32; //new SM3Digest().getDigestSize();
byte[] result = new byte[c1c3c2.length];
System.arraycopy(c1c3c2, 0, result, 0, c1Len); //c1: 0->65
System.arraycopy(c1c3c2, c1Len + c3Len, result, c1Len, c1c3c2.length - c1Len - c3Len); //c2
System.arraycopy(c1c3c2, c1Len, result, c1c3c2.length - c3Len, c3Len); //c3
return result;
}
private final static int RS_LEN = 32;
private static byte[] bigIntToFixexLengthBytes(BigInteger rOrS) {
// for sm2p256v1, n is 00fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123,
// r and s are the result of mod n, so they should be less than n and have length<=32
byte[] rs = rOrS.toByteArray();
if (rs.length == RS_LEN) return rs;
else if (rs.length == RS_LEN + 1 && rs[0] == 0) return Arrays.copyOfRange(rs, 1, RS_LEN + 1);
else if (rs.length < RS_LEN) {
byte[] result = new byte[RS_LEN];
Arrays.fill(result, (byte) 0);
System.arraycopy(rs, 0, result, RS_LEN - rs.length, rs.length);
return result;
} else {
throw new RuntimeException("err rs: " + Hex.toHexString(rs));
}
}
/**
* BC的SM3withSM2签名得到的结果的rs是asn1格式的，这个方法转化成直接拼接r||s
*
* @param rsDer rs in asn1 format
* @return sign result in plain byte array
*/
private static byte[] rsAsn1ToPlainByteArray(byte[] rsDer) {
ASN1Sequence seq = ASN1Sequence.getInstance(rsDer);
byte[] r = bigIntToFixexLengthBytes(ASN1Integer.getInstance(seq.getObjectAt(0)).getValue());
byte[] s = bigIntToFixexLengthBytes(ASN1Integer.getInstance(seq.getObjectAt(1)).getValue());
byte[] result = new byte[RS_LEN * 2];
System.arraycopy(r, 0, result, 0, r.length);
System.arraycopy(s, 0, result, RS_LEN, s.length);
return result;
}
/**
* BC的SM3withSM2验签需要的rs是asn1格式的，这个方法将直接拼接r||s的字节数组转化成asn1格式
*
* @param sign in plain byte array
* @return rs result in asn1 format
*/
private static byte[] rsPlainByteArrayToAsn1(byte[] sign) {
if (sign.length != RS_LEN * 2) throw new RuntimeException("err rs. ");
BigInteger r = new BigInteger(1, Arrays.copyOfRange(sign, 0, RS_LEN));
BigInteger s = new BigInteger(1, Arrays.copyOfRange(sign, RS_LEN, RS_LEN * 2));
ASN1EncodableVector v = new ASN1EncodableVector();
v.add(new ASN1Integer(r));
v.add(new ASN1Integer(s));
try {
return new DERSequence(v).getEncoded("DER");
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static BCECPrivateKey getPrivatekeyFromD(BigInteger d) {
ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(d, ecParameterSpec);
return new BCECPrivateKey("EC", ecPrivateKeySpec, BouncyCastleProvider.CONFIGURATION);
}
public static BCECPublicKey getPublickeyFromXY(BigInteger x, BigInteger y) {
ECPublicKeySpec ecPublicKeySpec = new ECPublicKeySpec(x9ECParameters.getCurve().createPoint(x, y), ecParameterSpec);
return new BCECPublicKey("EC", ecPublicKeySpec, BouncyCastleProvider.CONFIGURATION);
}
/**
* c1||c3||c2
*
* @param data
* @param key
* @return
*/
public static byte[] sm2Decrypt(byte[] data, PrivateKey key) {
return sm2DecryptOld(changeC1C3C2ToC1C2C3(data), key);
}
/**
* c1||c3||c2
*
* @param data
* @param key
* @return
*/
public static byte[] sm2Encrypt(byte[] data, PublicKey key) {
return changeC1C2C3ToC1C3C2(sm2EncryptOld(data, key));
}
/**
* c1||c2||c3
*
* @param data
* @param key
* @return
*/
public static byte[] sm2EncryptOld(byte[] data, PublicKey key) {
BCECPublicKey localECPublicKey = (BCECPublicKey) key;
ECPublicKeyParameters ecPublicKeyParameters = new ECPublicKeyParameters(localECPublicKey.getQ(), ecDomainParameters);
SM2Engine sm2Engine = new SM2Engine();
sm2Engine.init(true, new ParametersWithRandom(ecPublicKeyParameters, new SecureRandom()));
try {
return sm2Engine.processBlock(data, 0, data.length);
} catch (InvalidCipherTextException e) {
throw new RuntimeException(e);
}
}
/**
* c1||c2||c3
*
* @param data
* @param key
* @return
*/
public static byte[] sm2DecryptOld(byte[] data, PrivateKey key) {
BCECPrivateKey localECPrivateKey = (BCECPrivateKey) key;
ECPrivateKeyParameters ecPrivateKeyParameters = new ECPrivateKeyParameters(localECPrivateKey.getD(), ecDomainParameters);
SM2Engine sm2Engine = new SM2Engine();
sm2Engine.init(false, ecPrivateKeyParameters);
try {
return sm2Engine.processBlock(data, 0, data.length);
} catch (InvalidCipherTextException e) {
throw new RuntimeException(e);
}
}
public static byte[] sm4Encrypt(byte[] keyBytes, byte[] plain) {
if (keyBytes.length != 16) throw new RuntimeException("err key length");
// if (plain.length % 16 != 0) throw new RuntimeException("err data length");
try {
Key key = new SecretKeySpec(keyBytes, "SM4");
Cipher out = BCUtils.getCipher("SM4/ECB/PKCS7Padding");
out.init(Cipher.ENCRYPT_MODE, key);
return out.doFinal(plain);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static byte[] sm4Decrypt(byte[] keyBytes, byte[] cipher) {
// if (keyBytes.length != 16) throw new RuntimeException("err key length");
if (cipher.length % 16 != 0) throw new RuntimeException("err data length");
try {
Key key = new SecretKeySpec(keyBytes, "SM4");
Cipher in = BCUtils.getCipher("SM4/ECB/PKCS7Padding");
in.init(Cipher.DECRYPT_MODE, key);
return in.doFinal(cipher);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void main(String[] args) {
byte[] msg = "1234567890".getBytes();
byte[] userId = "D91CEB11EE62219CD91CEB11EE62219C".getBytes();
byte[] prvkey = Hex.decode("1G6POK3GK01J3F60C80A00006596692C");
byte[] pubkey = Hex.decode("BDdub2iiQD958SQcbt4FKFgvq4seGGWGmZdRBqUZ3n3FbFcOqk0gbsHSbhyCD7nRfcq/lNeaMsg4MoaSDvFvE2Q=");
byte[] asig = signSm3WithSm2(msg, userId, prvkey);
System.out.println(Hex.toHexString(asig));
boolean verified = verifySm3WithSm2(msg, userId, asig, pubkey);
System.out.println(verified);
String plainString = "1234567890abcdef";
byte[] plain = plainString.getBytes();
System.out.println(new String(plain));
// byte[] key = Hex.decode("0123456789abcdeffedcba9876543210");
byte[] sm4key = "0123456789abcdef".getBytes();
// byte[] cipher = Hex.decode("595298c7c6fd271f0402f804c33d3f66");
byte[] bs = sm4Encrypt(sm4key, plain);
System.out.println(Hex.toHexString(bs));
;
bs = sm4Decrypt(sm4key, bs);
System.out.println(new String(bs));
System.out.println(Hex.toHexString(bs));
}
}