java 国密算法sm2、sm3

国密即国家密码局认定的国产密码算法。主要有SM1，SM2，SM3，SM4。密钥长度和分组长度均为128位。

SM1 为对称加密。其加密强度与AES相当。该算法不公开，调用该算法时，需要通过加密芯片的接口进行调用。

SM2为非对称加密，基于ECC。该算法已公开。由于该算法基于ECC，故其签名速度与秘钥生成速度都快于RSA。ECC 256位（SM2采用的就是ECC 256位的一种）安全强度比RSA 2048位高，但运算速度快于RSA。

SM3 消息摘要。可以用MD5作为对比理解。该算法已公开。校验结果为256位。

SM4 无线局域网标准的分组数据算法。对称加密，密钥长度和分组长度均为128位。

由于SM1、SM4加解密的分组大小为128bit，故对消息进行加解密时，若消息长度过长，需要进行分组，要消息长度不足，则要进行填充。

java代码下载：

https://download.csdn.net/download/weixin_30512027/10901805

pom需添加

<!–国密–>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.56</version>
</dependency>
sm2：

public class SM2 {
private static BigInteger n = new BigInteger(
“FFFFFFFE” + “FFFFFFFF” + “FFFFFFFF” + “FFFFFFFF” + “7203DF6B” + “21C6052B” + “53BBF409” + “39D54123”, 16);
private static BigInteger p = new BigInteger(
“FFFFFFFE” + “FFFFFFFF” + “FFFFFFFF” + “FFFFFFFF” + “FFFFFFFF” + “00000000” + “FFFFFFFF” + “FFFFFFFF”, 16);
private static BigInteger a = new BigInteger(
“FFFFFFFE” + “FFFFFFFF” + “FFFFFFFF” + “FFFFFFFF” + “FFFFFFFF” + “00000000” + “FFFFFFFF” + “FFFFFFFC”, 16);
private static BigInteger b = new BigInteger(
“28E9FA9E” + “9D9F5E34” + “4D5A9E4B” + “CF6509A7” + “F39789F5” + “15AB8F92” + “DDBCBD41” + “4D940E93”, 16);
private static BigInteger gx = new BigInteger(
“32C4AE2C” + “1F198119” + “5F990446” + “6A39C994” + “8FE30BBF” + “F2660BE1” + “715A4589” + “334C74C7”, 16);
private static BigInteger gy = new BigInteger(
“BC3736A2” + “F4F6779C” + “59BDCEE3” + “6B692153” + “D0A9877C” + “C62A4740” + “02DF32E5” + “2139F0A0”, 16);
private static ECDomainParameters ecc_bc_spec;
private static int w = (int) Math.ceil(n.bitLength() * 1.0 / 2) – 1;
private static BigInteger _2w = new BigInteger(“2”).pow(w);
private static final int DIGEST_LENGTH = 32;

private static SecureRandom random = new SecureRandom();
private static ECCurve.Fp curve;
private static ECPoint G;
private boolean debug = false;

public boolean isDebug() {
return debug;
}

public void setDebug(boolean debug) {
this.debug = debug;
}

/**
* 以16进制打印字节数组
*
* @param b
*/
public static void printHexString(byte[] b) {
for (int i = 0; i < b.length; i++) {
String hex = Integer.toHexString(b[i] & 0xFF);
if (hex.length() == 1) {
hex = ‘0’ + hex;
}
System.out.print(hex.toUpperCase());
}
System.out.println();
}

/**
* 随机数生成器
*
* @param max
* @return
*/
private static BigInteger random(BigInteger max) {

BigInteger r = new BigInteger(256, random);
// int count = 1;

while (r.compareTo(max) >= 0) {
r = new BigInteger(128, random);
// count++;
}

// System.out.println(“count: ” + count);
return r;
}

/**
* 判断字节数组是否全0
*
* @param buffer
* @return
*/
private boolean allZero(byte[] buffer) {
for (int i = 0; i < buffer.length; i++) {
if (buffer[i] != 0)
return false;
}
return true;
}

/**
* 公钥加密
*
* @param input
* 加密原文
* @param publicKey
* 公钥
* @return
*/
public byte[] encrypt(String input, ECPoint publicKey) {

byte[] inputBuffer = input.getBytes();
if (debug)
printHexString(inputBuffer);

byte[] C1Buffer;
ECPoint kpb;
byte[] t;
do {
/* 1 产生随机数k，k属于[1, n-1] */
BigInteger k = random(n);
if (debug) {
System.out.print(“k: “);
printHexString(k.toByteArray());
}

/* 2 计算椭圆曲线点C1 = [k]G = (x1, y1) */
ECPoint C1 = G.multiply(k);
C1Buffer = C1.getEncoded(false);
if (debug) {
System.out.print(“C1: “);
printHexString(C1Buffer);
}

/*
* 3 计算椭圆曲线点 S = [h]Pb
*/
BigInteger h = ecc_bc_spec.getH();
if (h != null) {
ECPoint S = publicKey.multiply(h);
if (S.isInfinity())
throw new IllegalStateException();
}

/* 4 计算 [k]PB = (x2, y2) */
kpb = publicKey.multiply(k).normalize();

/* 5 计算 t = KDF(x2||y2, klen) */
byte[] kpbBytes = kpb.getEncoded(false);
t = KDF(kpbBytes, inputBuffer.length);
// DerivationFunction kdf = new KDF1BytesGenerator(new
// ShortenedDigest(new SHA256Digest(), DIGEST_LENGTH));
//
// t = new byte[inputBuffer.length];
// kdf.init(new ISO18033KDFParameters(kpbBytes));
// kdf.generateBytes(t, 0, t.length);
} while (allZero(t));

/* 6 计算C2=M^t */
byte[] C2 = new byte[inputBuffer.length];
for (int i = 0; i < inputBuffer.length; i++) {
C2[i] = (byte) (inputBuffer[i] ^ t[i]);
}

/* 7 计算C3 = Hash(x2 || M || y2) */
byte[] C3 = sm3hash(kpb.getXCoord().toBigInteger().toByteArray(), inputBuffer,
kpb.getYCoord().toBigInteger().toByteArray());

/* 8 输出密文 C=C1 || C2 || C3 */

byte[] encryptResult = new byte[C1Buffer.length + C2.length + C3.length];

System.arraycopy(C1Buffer, 0, encryptResult, 0, C1Buffer.length);
System.arraycopy(C2, 0, encryptResult, C1Buffer.length, C2.length);
System.arraycopy(C3, 0, encryptResult, C1Buffer.length + C2.length, C3.length);

if (debug) {
System.out.print(“密文: “);
printHexString(encryptResult);
}

return encryptResult;
}

/**
* 私钥解密
*
* @param encryptData
* 密文数据字节数组
* @param privateKey
* 解密私钥
* @return
*/
public String decrypt(byte[] encryptData, BigInteger privateKey) {

if (debug)
System.out.println(“encryptData length: ” + encryptData.length);

byte[] C1Byte = new byte[65];
System.arraycopy(encryptData, 0, C1Byte, 0, C1Byte.length);

ECPoint C1 = curve.decodePoint(C1Byte).normalize();

/*
* 计算椭圆曲线点 S = [h]C1 是否为无穷点
*/
BigInteger h = ecc_bc_spec.getH();
if (h != null) {
ECPoint S = C1.multiply(h);
if (S.isInfinity())
throw new IllegalStateException();
}
/* 计算[dB]C1 = (x2, y2) */
ECPoint dBC1 = C1.multiply(privateKey).normalize();

/* 计算t = KDF(x2 || y2, klen) */
byte[] dBC1Bytes = dBC1.getEncoded(false);
int klen = encryptData.length – 65 – DIGEST_LENGTH;
byte[] t = KDF(dBC1Bytes, klen);
// DerivationFunction kdf = new KDF1BytesGenerator(new
// ShortenedDigest(new SHA256Digest(), DIGEST_LENGTH));
// if (debug)
// System.out.println(“klen = ” + klen);
// kdf.init(new ISO18033KDFParameters(dBC1Bytes));
// kdf.generateBytes(t, 0, t.length);

if (allZero(t)) {
System.err.println(“all zero”);
throw new IllegalStateException();
}

/* 5 计算M’=C2^t */
byte[] M = new byte[klen];
for (int i = 0; i < M.length; i++) {
M[i] = (byte) (encryptData[C1Byte.length + i] ^ t[i]);
}
if (debug)
printHexString(M);

/* 6 计算 u = Hash(x2 || M’ || y2) 判断 u == C3是否成立 */
byte[] C3 = new byte[DIGEST_LENGTH];

if (debug)
try {
System.out.println(“M = ” + new String(M, “UTF8”));
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

System.arraycopy(encryptData, encryptData.length – DIGEST_LENGTH, C3, 0, DIGEST_LENGTH);
byte[] u = sm3hash(dBC1.getXCoord().toBigInteger().toByteArray(), M,
dBC1.getYCoord().toBigInteger().toByteArray());
if (Arrays.equals(u, C3)) {
if (debug)
System.out.println(“解密成功”);
try {
return new String(M, “UTF8”);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return null;
} else {
if (debug) {
System.out.print(“u = “);
printHexString(u);
System.out.print(“C3 = “);
printHexString(C3);
System.err.println(“解密验证失败”);
}
return null;
}

}

// /**
// * SHA摘要
// * @param x2
// * @param M
// * @param y2
// * @return
// */
// private byte[] calculateHash(BigInteger x2, byte[] M, BigInteger y2) {
// ShortenedDigest digest = new ShortenedDigest(new SHA256Digest(),
// DIGEST_LENGTH);
// byte[] buf = x2.toByteArray();
// digest.update(buf, 0, buf.length);
// digest.update(M, 0, M.length);
// buf = y2.toByteArray();
// digest.update(buf, 0, buf.length);
//
// buf = new byte[DIGEST_LENGTH];
// digest.doFinal(buf, 0);
//
// return buf;
// }

/**
* 判断是否在范围内
*
* @param param
* @param min
* @param max
* @return
*/
private boolean between(BigInteger param, BigInteger min, BigInteger max) {
if (param.compareTo(min) >= 0 && param.compareTo(max) < 0) {
return true;
} else {
return false;
}
}

/**
* 判断生成的公钥是否合法
*
* @param publicKey
* @return
*/
private boolean checkPublicKey(ECPoint publicKey) {

if (!publicKey.isInfinity()) {

BigInteger x = publicKey.getXCoord().toBigInteger();
BigInteger y = publicKey.getYCoord().toBigInteger();

if (between(x, new BigInteger(“0”), p) && between(y, new BigInteger(“0”), p)) {

BigInteger xResult = x.pow(3).add(a.multiply(x)).add(b).mod(p);

if (debug)
System.out.println(“xResult: ” + xResult.toString());

BigInteger yResult = y.pow(2).mod(p);

if (debug)
System.out.println(“yResult: ” + yResult.toString());

if (yResult.equals(xResult) && publicKey.multiply(n).isInfinity()) {
return true;
}
}
}
return false;
}

/**
* 生成密钥对
*
* @return
*/
public SM2KeyPair generateKeyPair() {

BigInteger d = random(n.subtract(new BigInteger(“1”)));

SM2KeyPair keyPair = new SM2KeyPair(G.multiply(d).normalize(), d);

if (checkPublicKey(keyPair.getPublicKey())) {
if (debug)
System.out.println(“generate key successfully”);
return keyPair;
} else {
if (debug)
System.err.println(“generate key failed”);
return null;
}
}

public SM2() {
curve = new ECCurve.Fp(p, // q
a, // a
b); // b
G = curve.createPoint(gx, gy);
ecc_bc_spec = new ECDomainParameters(curve, G, n);
}

public SM2(boolean debug) {
this();
this.debug = debug;
}

/**
* 导出公钥到本地
*
* @param publicKey
* @param path
*/
public void exportPublicKey(ECPoint publicKey, String path) {
File file = new File(path);
try {
if (!file.exists())
file.createNewFile();
byte buffer[] = publicKey.getEncoded(false);
FileOutputStream fos = new FileOutputStream(file);
fos.write(buffer);
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 从本地导入公钥
*
* @param path
* @return
*/
public ECPoint importPublicKey(String path) {
File file = new File(path);
try {
if (!file.exists())
return null;
FileInputStream fis = new FileInputStream(file);
ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte buffer[] = new byte[16];
int size;
while ((size = fis.read(buffer)) != -1) {
baos.write(buffer, 0, size);
}
fis.close();
return curve.decodePoint(baos.toByteArray());
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

/**
* 导出私钥到本地
*
* @param privateKey
* @param path
*/
public void exportPrivateKey(BigInteger privateKey, String path) {
File file = new File(path);
try {
if (!file.exists())
file.createNewFile();
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(file));
oos.writeObject(privateKey);
oos.close();
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 从本地导入私钥
*
* @param path
* @return
*/
public BigInteger importPrivateKey(String path) {
File file = new File(path);
try {
if (!file.exists())
return null;
FileInputStream fis = new FileInputStream(file);
ObjectInputStream ois = new ObjectInputStream(fis);
BigInteger res = (BigInteger) (ois.readObject());
ois.close();
fis.close();
return res;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* 字节数组拼接
*
* @param params
* @return
*/
private static byte[] join(byte[]… params) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] res = null;
try {
for (int i = 0; i < params.length; i++) {
baos.write(params[i]);
}
res = baos.toByteArray();
} catch (IOException e) {
e.printStackTrace();
}
return res;
}

/**
* sm3摘要
*
* @param params
* @return
*/
private static byte[] sm3hash(byte[]… params) {
byte[] res = null;
try {
res = SM3.hash(join(params));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return res;
}

/**
* 取得用户标识字节数组
*
* @param IDA
* @param aPublicKey
* @return
*/
private static byte[] ZA(String IDA, ECPoint aPublicKey) {
byte[] idaBytes = IDA.getBytes();
int entlenA = idaBytes.length * 8;
byte[] ENTLA = new byte[] { (byte) (entlenA & 0xFF00), (byte) (entlenA & 0x00FF) };
byte[] ZA = sm3hash(ENTLA, idaBytes, a.toByteArray(), b.toByteArray(), gx.toByteArray(), gy.toByteArray(),
aPublicKey.getXCoord().toBigInteger().toByteArray(),
aPublicKey.getYCoord().toBigInteger().toByteArray());
return ZA;
}

/**
* 签名
*
* @param M
* 签名信息
* @param IDA
* 签名方唯一标识
* @param keyPair
* 签名方密钥对
* @return 签名
*/
public Signature sign(String M, String IDA, SM2KeyPair keyPair) {
byte[] ZA = ZA(IDA, keyPair.getPublicKey());
byte[] M_ = join(ZA, M.getBytes());
BigInteger e = new BigInteger(1, sm3hash(M_));
// BigInteger k = new BigInteger(
// “6CB28D99 385C175C 94F94E93 4817663F C176D925 DD72B727 260DBAAE
// 1FB2F96F”.replace(” “, “”), 16);
BigInteger k;
BigInteger r;
do {
k = random(n);
ECPoint p1 = G.multiply(k).normalize();
BigInteger x1 = p1.getXCoord().toBigInteger();
r = e.add(x1);
r = r.mod(n);
} while (r.equals(BigInteger.ZERO) || r.add(k).equals(n));

BigInteger s = ((keyPair.getPrivateKey().add(BigInteger.ONE).modInverse(n))
.multiply((k.subtract(r.multiply(keyPair.getPrivateKey()))).mod(n))).mod(n);

return new Signature(r, s);
}

/**
* 验签
*
* @param M
* 签名信息
* @param signature
* 签名
* @param IDA
* 签名方唯一标识
* @param aPublicKey
* 签名方公钥
* @return true or false
*/
public boolean verify(String M, Signature signature, String IDA, ECPoint aPublicKey) {
if (!between(signature.r, BigInteger.ONE, n))
return false;
if (!between(signature.s, BigInteger.ONE, n))
return false;

byte[] M_ = join(ZA(IDA, aPublicKey), M.getBytes());
BigInteger e = new BigInteger(1, sm3hash(M_));
BigInteger t = signature.r.add(signature.s).mod(n);

if (t.equals(BigInteger.ZERO))
return false;

ECPoint p1 = G.multiply(signature.s).normalize();
ECPoint p2 = aPublicKey.multiply(t).normalize();
BigInteger x1 = p1.add(p2).normalize().getXCoord().toBigInteger();
BigInteger R = e.add(x1).mod(n);
if (R.equals(signature.r))
return true;
return false;
}

/**
* 密钥派生函数
*
* @param Z
* @param klen
* 生成klen字节数长度的密钥
* @return
*/
private static byte[] KDF(byte[] Z, int klen) {
int ct = 1;
int end = (int) Math.ceil(klen * 1.0 / 32);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
for (int i = 1; i < end; i++) {
baos.write(sm3hash(Z, SM3.toByteArray(ct)));
ct++;
}
byte[] last = sm3hash(Z, SM3.toByteArray(ct));
if (klen % 32 == 0) {
baos.write(last);
} else
baos.write(last, 0, klen % 32);
return baos.toByteArray();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* 传输实体类
*
* @author Potato
*
*/
private static class TransportEntity implements Serializable {
final byte[] R; //R点
final byte[] S; //验证S
final byte[] Z; //用户标识
final byte[] K; //公钥

public TransportEntity(byte[] r, byte[] s,byte[] z,ECPoint pKey) {
R = r;
S = s;
Z=z;
K=pKey.getEncoded(false);
}
}

/**
* 密钥协商辅助类
*
* @author Potato
*
*/
public static class KeyExchange {
BigInteger rA;
ECPoint RA;
ECPoint V;
byte[] Z;
byte[] key;

String ID;
SM2KeyPair keyPair;

public KeyExchange(String ID,SM2KeyPair keyPair) {
this.ID=ID;
this.keyPair = keyPair;
this.Z=ZA(ID, keyPair.getPublicKey());
}

/**
* 密钥协商发起第一步
*
* @return
*/
public TransportEntity keyExchange_1() {
rA = random(n);
// rA=new BigInteger(“83A2C9C8 B96E5AF7 0BD480B4 72409A9A 327257F1
// EBB73F5B 073354B2 48668563″.replace(” “, “”),16);
RA = G.multiply(rA).normalize();
return new TransportEntity(RA.getEncoded(false), null,Z,keyPair.getPublicKey());
}

/**
* 密钥协商响应方
*
* @param entity 传输实体
* @return
*/
public TransportEntity keyExchange_2(TransportEntity entity) {
BigInteger rB = random(n);
// BigInteger rB=new BigInteger(“33FE2194 0342161C 55619C4A 0C060293
// D543C80A F19748CE 176D8347 7DE71C80″.replace(” “, “”),16);
ECPoint RB = G.multiply(rB).normalize();

this.rA=rB;
this.RA=RB;

BigInteger x2 = RB.getXCoord().toBigInteger();
x2 = _2w.add(x2.and(_2w.subtract(BigInteger.ONE)));

BigInteger tB = keyPair.getPrivateKey().add(x2.multiply(rB)).mod(n);
ECPoint RA = curve.decodePoint(entity.R).normalize();

BigInteger x1 = RA.getXCoord().toBigInteger();
x1 = _2w.add(x1.and(_2w.subtract(BigInteger.ONE)));

ECPoint aPublicKey=curve.decodePoint(entity.K).normalize();
ECPoint temp = aPublicKey.add(RA.multiply(x1).normalize()).normalize();
ECPoint V = temp.multiply(ecc_bc_spec.getH().multiply(tB)).normalize();
if (V.isInfinity())
throw new IllegalStateException();
this.V=V;

byte[] xV = V.getXCoord().toBigInteger().toByteArray();
byte[] yV = V.getYCoord().toBigInteger().toByteArray();
byte[] KB = KDF(join(xV, yV, entity.Z, this.Z), 16);
key = KB;
System.out.print(“协商得B密钥:”);
printHexString(KB);
byte[] sB = sm3hash(new byte[] { 0x02 }, yV,
sm3hash(xV, entity.Z, this.Z, RA.getXCoord().toBigInteger().toByteArray(),
RA.getYCoord().toBigInteger().toByteArray(), RB.getXCoord().toBigInteger().toByteArray(),
RB.getYCoord().toBigInteger().toByteArray()));
return new TransportEntity(RB.getEncoded(false), sB,this.Z,keyPair.getPublicKey());
}

/**
* 密钥协商发起方第二步
*
* @param entity 传输实体
*/
public TransportEntity keyExchange_3(TransportEntity entity) {
BigInteger x1 = RA.getXCoord().toBigInteger();
x1 = _2w.add(x1.and(_2w.subtract(BigInteger.ONE)));

BigInteger tA = keyPair.getPrivateKey().add(x1.multiply(rA)).mod(n);
ECPoint RB = curve.decodePoint(entity.R).normalize();

BigInteger x2 = RB.getXCoord().toBigInteger();
x2 = _2w.add(x2.and(_2w.subtract(BigInteger.ONE)));

ECPoint bPublicKey=curve.decodePoint(entity.K).normalize();
ECPoint temp = bPublicKey.add(RB.multiply(x2).normalize()).normalize();
ECPoint U = temp.multiply(ecc_bc_spec.getH().multiply(tA)).normalize();
if (U.isInfinity())
throw new IllegalStateException();
this.V=U;

byte[] xU = U.getXCoord().toBigInteger().toByteArray();
byte[] yU = U.getYCoord().toBigInteger().toByteArray();
byte[] KA = KDF(join(xU, yU,
this.Z, entity.Z), 16);
key = KA;
System.out.print(“协商得A密钥:”);
printHexString(KA);
byte[] s1= sm3hash(new byte[] { 0x02 }, yU,
sm3hash(xU, this.Z, entity.Z, RA.getXCoord().toBigInteger().toByteArray(),
RA.getYCoord().toBigInteger().toByteArray(), RB.getXCoord().toBigInteger().toByteArray(),
RB.getYCoord().toBigInteger().toByteArray()));
if(Arrays.equals(entity.S, s1))
System.out.println(“B->A 密钥确认成功”);
else
System.out.println(“B->A 密钥确认失败”);
byte[] sA= sm3hash(new byte[] { 0x03 }, yU,
sm3hash(xU, this.Z, entity.Z, RA.getXCoord().toBigInteger().toByteArray(),
RA.getYCoord().toBigInteger().toByteArray(), RB.getXCoord().toBigInteger().toByteArray(),
RB.getYCoord().toBigInteger().toByteArray()));

return new TransportEntity(RA.getEncoded(false), sA,this.Z,keyPair.getPublicKey());
}

/**
* 密钥确认最后一步
*
* @param entity 传输实体
*/
public void keyExchange_4(TransportEntity entity) {
byte[] xV = V.getXCoord().toBigInteger().toByteArray();
byte[] yV = V.getYCoord().toBigInteger().toByteArray();
ECPoint RA = curve.decodePoint(entity.R).normalize();
byte[] s2= sm3hash(new byte[] { 0x03 }, yV,
sm3hash(xV, entity.Z, this.Z, RA.getXCoord().toBigInteger().toByteArray(),
RA.getYCoord().toBigInteger().toByteArray(), this.RA.getXCoord().toBigInteger().toByteArray(),
this.RA.getYCoord().toBigInteger().toByteArray()));
if(Arrays.equals(entity.S, s2))
System.out.println(“A->B 密钥确认成功”);
else
System.out.println(“A->B 密钥确认失败”);
}
}

public static void main(String[] args) throws UnsupportedEncodingException {

SM2 sm02 = new SM2();

System.out.println(“—————–公钥加密与解密—————–“);
ECPoint publicKey = sm02.importPublicKey(“E:/publickey.pem”);
BigInteger privateKey = sm02.importPrivateKey(“E:/privatekey.pem”);
byte[] data = sm02.encrypt(“测试加密aaaaaaaaaaa123aabb”, publicKey);
System.out.print(“密文:”);
SM2.printHexString(data);
System.out.println(“解密后明文:” + sm02.decrypt(data, privateKey));

System.out.println(“—————–签名与验签—————–“);
String IDA = “Heartbeats”;
String M = “要签名的信息”;
Signature signature = sm02.sign(M, IDA, new SM2KeyPair(publicKey, privateKey));
System.out.println(“用户标识:” + IDA);
System.out.println(“签名信息:” + M);
System.out.println(“数字签名:” + signature);
System.out.println(“验证签名:” + sm02.verify(M, signature, IDA, publicKey));

System.out.println(“—————–密钥协商—————–“);
String aID = “AAAAAAAAAAAAA”;
SM2KeyPair aKeyPair = sm02.generateKeyPair();
KeyExchange aKeyExchange = new KeyExchange(aID,aKeyPair);

String bID = “BBBBBBBBBBBBB”;
SM2KeyPair bKeyPair = sm02.generateKeyPair();
KeyExchange bKeyExchange = new KeyExchange(bID,bKeyPair);
TransportEntity entity1 = aKeyExchange.keyExchange_1();
TransportEntity entity2 = bKeyExchange.keyExchange_2(entity1);
TransportEntity entity3 = aKeyExchange.keyExchange_3(entity2);
bKeyExchange.keyExchange_4(entity3);
}

public static class Signature {
BigInteger r;
BigInteger s;

public Signature(BigInteger r, BigInteger s) {
this.r = r;
this.s = s;
}

public String toString() {
return r.toString(16) + “,” + s.toString(16);
}
}
}
sm3：

public class SM3 {

private static char[] hexDigits = {‘0’, ‘1’, ‘2’, ‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’,
‘9’, ‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’};
private static final String ivHexStr = “7380166f 4914b2b9 172442d7 da8a0600 a96f30bc 163138aa e38dee4d b0fb0e4e”;
private static final BigInteger IV = new BigInteger(ivHexStr.replaceAll(” “,
“”), 16);
private static final Integer Tj15 = Integer.valueOf(“79cc4519”, 16);
private static final Integer Tj63 = Integer.valueOf(“7a879d8a”, 16);
private static final byte[] FirstPadding = {(byte) 0x80};
private static final byte[] ZeroPadding = {(byte) 0x00};

private static int T(int j) {
if (j >= 0 && j <= 15) {
return Tj15.intValue();
} else if (j >= 16 && j <= 63) {
return Tj63.intValue();
} else {
throw new RuntimeException(“data invalid”);
}
}

private static Integer FF(Integer x, Integer y, Integer z, int j) {
if (j >= 0 && j <= 15) {
return Integer.valueOf(x.intValue() ^ y.intValue() ^ z.intValue());
} else if (j >= 16 && j <= 63) {
return Integer.valueOf((x.intValue() & y.intValue())
| (x.intValue() & z.intValue())
| (y.intValue() & z.intValue()));
} else {
throw new RuntimeException(“data invalid”);
}
}

private static Integer GG(Integer x, Integer y, Integer z, int j) {
if (j >= 0 && j <= 15) {
return Integer.valueOf(x.intValue() ^ y.intValue() ^ z.intValue());
} else if (j >= 16 && j <= 63) {
return Integer.valueOf((x.intValue() & y.intValue())
| (~x.intValue() & z.intValue()));
} else {
throw new RuntimeException(“data invalid”);
}
}

private static Integer P0(Integer x) {
return Integer.valueOf(x.intValue()
^ Integer.rotateLeft(x.intValue(), 9)
^ Integer.rotateLeft(x.intValue(), 17));
}

private static Integer P1(Integer x) {
return Integer.valueOf(x.intValue()
^ Integer.rotateLeft(x.intValue(), 15)
^ Integer.rotateLeft(x.intValue(), 23));
}

private static byte[] padding(byte[] source) throws IOException {
if (source.length >= 0x2000000000000000l) {
throw new RuntimeException(“src data invalid.”);
}
long l = source.length * 8;
long k = 448 – (l + 1) % 512;
if (k < 0) {
k = k + 512;
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
baos.write(source);
baos.write(FirstPadding);
long i = k – 7;
while (i > 0) {
baos.write(ZeroPadding);
i -= 8;
}
baos.write(long2bytes(l));
return baos.toByteArray();
}

private static byte[] long2bytes(long l) {
byte[] bytes = new byte[8];
for (int i = 0; i < 8; i++) {
bytes[i] = (byte) (l >>> ((7 – i) * 8));
}
return bytes;
}

public static byte[] hash(byte[] source) throws IOException {
byte[] m1 = padding(source);
int n = m1.length / (512 / 8);
byte[] b;
byte[] vi = IV.toByteArray();
byte[] vi1 = null;
for (int i = 0; i < n; i++) {
b = Arrays.copyOfRange(m1, i * 64, (i + 1) * 64);
vi1 = CF(vi, b);
vi = vi1;
}
return vi1;
}

private static byte[] CF(byte[] vi, byte[] bi) throws IOException {
int a, b, c, d, e, f, g, h;
a = toInteger(vi, 0);
b = toInteger(vi, 1);
c = toInteger(vi, 2);
d = toInteger(vi, 3);
e = toInteger(vi, 4);
f = toInteger(vi, 5);
g = toInteger(vi, 6);
h = toInteger(vi, 7);

int[] w = new int[68];
int[] w1 = new int[64];
for (int i = 0; i < 16; i++) {
w[i] = toInteger(bi, i);
}
for (int j = 16; j < 68; j++) {
w[j] = P1(w[j – 16] ^ w[j – 9] ^ Integer.rotateLeft(w[j – 3], 15))
^ Integer.rotateLeft(w[j – 13], 7) ^ w[j – 6];
}
for (int j = 0; j < 64; j++) {
w1[j] = w[j] ^ w[j + 4];
}
int ss1, ss2, tt1, tt2;
for (int j = 0; j < 64; j++) {
ss1 = Integer
.rotateLeft(
Integer.rotateLeft(a, 12) + e
+ Integer.rotateLeft(T(j), j), 7);
ss2 = ss1 ^ Integer.rotateLeft(a, 12);
tt1 = FF(a, b, c, j) + d + ss2 + w1[j];
tt2 = GG(e, f, g, j) + h + ss1 + w[j];
d = c;
c = Integer.rotateLeft(b, 9);
b = a;
a = tt1;
h = g;
g = Integer.rotateLeft(f, 19);
f = e;
e = P0(tt2);
}
byte[] v = toByteArray(a, b, c, d, e, f, g, h);
for (int i = 0; i < v.length; i++) {
v[i] = (byte) (v[i] ^ vi[i]);
}
return v;
}

private static int toInteger(byte[] source, int index) {
StringBuilder valueStr = new StringBuilder(“”);
for (int i = 0; i < 4; i++) {
valueStr.append(hexDigits[(byte) ((source[index * 4 + i] & 0xF0) >> 4)]);
valueStr.append(hexDigits[(byte) (source[index * 4 + i] & 0x0F)]);
}
return Long.valueOf(valueStr.toString(), 16).intValue();

}

private static byte[] toByteArray(int a, int b, int c, int d, int e, int f,
int g, int h) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream(32);
baos.write(toByteArray(a));
baos.write(toByteArray(b));
baos.write(toByteArray(c));
baos.write(toByteArray(d));
baos.write(toByteArray(e));
baos.write(toByteArray(f));
baos.write(toByteArray(g));
baos.write(toByteArray(h));
return baos.toByteArray();
}

public static byte[] toByteArray(int i) {
byte[] byteArray = new byte[4];
byteArray[0] = (byte) (i >>> 24);
byteArray[1] = (byte) ((i & 0xFFFFFF) >>> 16);
byteArray[2] = (byte) ((i & 0xFFFF) >>> 8);
byteArray[3] = (byte) (i & 0xFF);
return byteArray;
}
private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
n = 256 + n;
int d1 = n / 16;
int d2 = n % 16;
return “”+hexDigits[d1] + hexDigits[d2];
}

public static String byteArrayToHexString(byte[] b) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++) {
resultSb.append(byteToHexString(b[i]));
}
return resultSb.toString();
}

public static void main(String[] args) throws IOException {
System.out.println(SM3.byteArrayToHexString(SM3.hash(“test”.getBytes())));
}
}
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版权声明：本文为CSDN博主「程序猿吉良吉影」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/weixin_30512027/article/details/86013878