org.openeuler

类 SM2KeyExchangeUtil

java.lang.Object

org.openeuler.SM2KeyExchangeUtil

public class SM2KeyExchangeUtil
extends Object

SM2 KeyExchange util

字段概要

字段

限定符和类型	字段和说明
private static boolean	DEBUG
private static byte[]	DEFAULT_ID

构造器概要

构造器

构造器和说明
SM2KeyExchangeUtil()

方法概要

限定符和类型	方法和说明
private static byte[]	concat(BigInteger xV, BigInteger yV, byte[] ZA, byte[] ZB, boolean active)
private static byte[]	convertToBytes(BigInteger val) BigInteger convert to byte[] If bytes.length is less than 32 , the preceding 32-bytes.length bytes are filled with 0.
private static byte[]	convertToBytes(BigInteger val, int m)
static org.bouncycastle.jce.interfaces.ECPublicKey	generatePublicKey(org.bouncycastle.jce.interfaces.ECPrivateKey privateKey) Generate public key by ECPrivateKey
static org.bouncycastle.math.ec.ECPoint	generateR(org.bouncycastle.jce.interfaces.ECPublicKey publicKey, BigInteger random) R = [r] * G
static BigInteger	generateRandom(BigInteger n, SecureRandom secureRandom)
static BigInteger	generateRandom(org.bouncycastle.jce.interfaces.ECPublicKey publicKey, SecureRandom secureRandom)
static byte[]	generateSharedSecret(org.bouncycastle.jce.interfaces.ECPublicKey localPublicKey, org.bouncycastle.jce.interfaces.ECPrivateKey localPrivateKey, BigInteger localRandom, byte[] localId, org.bouncycastle.jce.interfaces.ECPublicKey peerPublicKey, byte[] peerRBytes, byte[] peerId, int secretLen, boolean active)
static byte[]	generateZ(byte[] idBytes, org.bouncycastle.jce.interfaces.ECPublicKey publicKey, MessageDigest messageDigest) Z = hash( idLenBytes || idBytes || (32bytes)a || (32bytes) b || (32bytes)gX || (32bytes)gY || (32bytes)qX || (32bytes) qY) )
private static void	intToBytes(byte[] iBytes, int num)
static byte[]	KDF(byte[] bytes, int keyLength, MessageDigest messageDigest)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

DEFAULT_ID

private static final byte[] DEFAULT_ID

DEBUG

private static boolean DEBUG

构造器详细资料

SM2KeyExchangeUtil

public SM2KeyExchangeUtil()

方法详细资料

generateSharedSecret

public static byte[] generateSharedSecret(org.bouncycastle.jce.interfaces.ECPublicKey localPublicKey,
                                          org.bouncycastle.jce.interfaces.ECPrivateKey localPrivateKey,
                                          BigInteger localRandom,
                                          byte[] localId,
                                          org.bouncycastle.jce.interfaces.ECPublicKey peerPublicKey,
                                          byte[] peerRBytes,
                                          byte[] peerId,
                                          int secretLen,
                                          boolean active)
                                   throws IOException,
                                          NoSuchAlgorithmException

抛出:

IOException

NoSuchAlgorithmException

generateR

public static org.bouncycastle.math.ec.ECPoint generateR(org.bouncycastle.jce.interfaces.ECPublicKey publicKey,
                                                         BigInteger random)

R = [r] * G

参数:

publicKey -

random -

返回:

R

generateRandom

public static BigInteger generateRandom(org.bouncycastle.jce.interfaces.ECPublicKey publicKey,
                                        SecureRandom secureRandom)

generateRandom

public static BigInteger generateRandom(BigInteger n,
                                        SecureRandom secureRandom)

generateZ

public static byte[] generateZ(byte[] idBytes,
                               org.bouncycastle.jce.interfaces.ECPublicKey publicKey,
                               MessageDigest messageDigest)

Z = hash( idLenBytes || idBytes || (32bytes)a || (32bytes) b || (32bytes)gX || (32bytes)gY || (32bytes)qX || (32bytes) qY) )

参数:

idBytes - id

publicKey - SM2 PublicKey

messageDigest - SM3 digest

返回:

Z

KDF

public static byte[] KDF(byte[] bytes,
                         int keyLength,
                         MessageDigest messageDigest)

intToBytes

private static void intToBytes(byte[] iBytes,
                               int num)

concat

private static byte[] concat(BigInteger xV,
                             BigInteger yV,
                             byte[] ZA,
                             byte[] ZB,
                             boolean active)
                      throws IOException

抛出:

IOException

convertToBytes

private static byte[] convertToBytes(BigInteger val)

BigInteger convert to byte[] If bytes.length is less than 32 , the preceding 32-bytes.length bytes are filled with 0. The format is as follows: 0..0 bytes[1]...bytes[bytes.length-1]

If the length is greater than or equal to 32 ,keep the last 32-bit byte. The format is as follows: bytes[bytes.length-32] ... bytes[bytes.length-1]

参数:

val - BigInteger

返回:

byte[]

convertToBytes

private static byte[] convertToBytes(BigInteger val,
                                     int m)

generatePublicKey

public static org.bouncycastle.jce.interfaces.ECPublicKey generatePublicKey(org.bouncycastle.jce.interfaces.ECPrivateKey privateKey)
                                                                     throws InvalidKeyException

Generate public key by ECPrivateKey

参数:

privateKey -

返回:

ECPublicKey

抛出:

InvalidKeyException