com.alipay.mychain.sdk.crypto

类 CryptoUtils

java.lang.Object

com.alipay.mychain.sdk.crypto.CryptoUtils

public class CryptoUtils
extends Object

版本:

$Id: CryptoUtils.java, v 0.1 2019-04-17 10:41 AM evan Exp $$

作者:

evan

构造器概要

构造器

构造器和说明
CryptoUtils()

方法概要

限定符和类型	方法和说明
static byte[]	Asn1MalformedIntProcess(byte[] octets) Reference: ITU-T X.690 - 8.3.2 8.3.2 If the contents octets of an integer value encoding consist of more than one octet, then the bits of the first octet and bit 8 of the second octet: a) shall not all be ones; and b) shall not all be zero.
static byte[]	getPubkeyFp(byte[] pubkey) Compute public key fingerprint
static byte[]	getPubkeyFp(byte[] pubkey, HashTypeEnum hashTypeEnum) Compute public key fingerprint
static void	initMaxKeySize() Some JDK version will throw "Illegal key size"
static org.bouncycastle.math.ec.ECPoint	publicPointFromPrivate(org.bouncycastle.crypto.params.ECDomainParameters curve, BigInteger privKey) Returns public key point from the given private key.
static org.bouncycastle.math.ec.ECPoint	publicPointFromPrivate(String curveName, BigInteger privKey) Returns public key point from the given private key.

从类继承的方法 java.lang.Object

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

构造器详细资料

CryptoUtils

public CryptoUtils()

方法详细资料

publicPointFromPrivate

public static org.bouncycastle.math.ec.ECPoint publicPointFromPrivate(org.bouncycastle.crypto.params.ECDomainParameters curve,
                                                                      BigInteger privKey)

Returns public key point from the given private key.

参数:

curve -

privKey -

返回:

publicPointFromPrivate

public static org.bouncycastle.math.ec.ECPoint publicPointFromPrivate(String curveName,
                                                                      BigInteger privKey)

Returns public key point from the given private key.

参数:

curveName -

privKey -

返回:

getPubkeyFp

public static byte[] getPubkeyFp(byte[] pubkey)

Compute public key fingerprint

参数:

pubkey -

返回:

getPubkeyFp

public static byte[] getPubkeyFp(byte[] pubkey,
                                 HashTypeEnum hashTypeEnum)

Compute public key fingerprint

参数:

pubkey -

返回:

initMaxKeySize

public static void initMaxKeySize()

Some JDK version will throw "Illegal key size"

Asn1MalformedIntProcess

public static byte[] Asn1MalformedIntProcess(byte[] octets)

Reference: ITU-T X.690 - 8.3.2 8.3.2 If the contents octets of an integer value encoding consist of more than one octet, then the bits of the first octet and bit 8 of the second octet: a) shall not all be ones; and b) shall not all be zero. NOTE �C These rules ensure that an integer value is always encoded in the smallest possible number of octets.

参数:

octets - (possible malformed integer)

返回:

processed octets