com.alipay.mychain.zoro.crypto

类 AlgorithmService

java.lang.Object

com.alipay.mychain.zoro.crypto.AlgorithmService

public class AlgorithmService
extends Object

     This is the class for crypto algorithms rsa2048Encrypt, ecdsaVerify, aes256GCM, sha256
     and random function.
 

版本:

$Id: AlgorithmService.java, v 0.1 2018-11-30 下午6:09 Felix.ll

作者:

felix.ll

字段概要

字段

限定符和类型	字段和说明
static int	SPEC_AES_GCM_NONCE_BYTE_LEN AES_GCM specs: CTR used 12bytes nonce || 4 bytes counter
static int	SPEC_AES_KEY_BYTE_LEN AES256 key spec

构造器概要

构造器

构造器和说明
AlgorithmService()

方法概要

限定符和类型	方法和说明
static byte[]	aes256GCM(int opmode, byte[] key, byte[] iv, byte[] input)
static boolean	ecdsaVerify(ECPublicKey pubkey, byte[] message, byte[] sigval)
static byte[]	genAES256SecretKey()
static void	initJceSecurityPolicy()
static byte[]	random(int len)
static byte[]	rsa2048Encrypt(RSAPublicKey pubkey, byte[] message)
static byte[]	sha256(byte[] msg)

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

SPEC_AES_KEY_BYTE_LEN

public static final int SPEC_AES_KEY_BYTE_LEN

AES256 key spec

另请参阅:

常量字段值

SPEC_AES_GCM_NONCE_BYTE_LEN

public static final int SPEC_AES_GCM_NONCE_BYTE_LEN

AES_GCM specs: CTR used 12bytes nonce || 4 bytes counter

另请参阅:

常量字段值

构造器详细资料

AlgorithmService

public AlgorithmService()

方法详细资料

initJceSecurityPolicy

public static void initJceSecurityPolicy()
                                  throws CryptoException

抛出:

CryptoException

rsa2048Encrypt

public static byte[] rsa2048Encrypt(RSAPublicKey pubkey,
                                    byte[] message)
                             throws CryptoException,
                                    InvalidKeyException,
                                    BadPaddingException

参数:

pubkey - the public key

message -

返回:

the ciphertext

抛出:

CryptoException

InvalidKeyException

BadPaddingException

ecdsaVerify

public static boolean ecdsaVerify(ECPublicKey pubkey,
                                  byte[] message,
                                  byte[] sigval)
                           throws SignatureException,
                                  InvalidKeyException,
                                  CryptoException

参数:

pubkey - bytes format for PublicKey, detail format is: <1 byte first number LEN>

message - content to be verify.

sigval - as mychain, the length of signature is 65 bytes as (r,s,v). The method to

返回:

is sign OK?

抛出:

CryptoException

SignatureException

InvalidKeyException

aes256GCM

public static byte[] aes256GCM(int opmode,
                               byte[] key,
                               byte[] iv,
                               byte[] input)
                        throws CryptoException,
                               InvalidKeyException,
                               InvalidAlgorithmParameterException

参数:

opmode - 1 is encryption, 2 is decryption.

key - 256-bit key

iv - 96-bit iv

input - plaintext or ciphertext

返回:

ciphertext or plaintext

抛出:

CryptoException

InvalidKeyException

InvalidAlgorithmParameterException

genAES256SecretKey

public static byte[] genAES256SecretKey()
                                 throws NoSuchAlgorithmException,
                                        CryptoException

参数:

-

返回:

aes 256 key (32 bytes)

抛出:

NoSuchAlgorithmException

CryptoException

sha256

public static byte[] sha256(byte[] msg)

参数:

msg - input message

返回:

32 byte of digest

random

public static byte[] random(int len)

参数:

len - number of random bytes

返回:

random number