本文整理汇总了Java中org.bouncycastle.jcajce.provider.digest.Keccak类的典型用法代码示例。如果您正苦于以下问题:Java Keccak类的具体用法?Java Keccak怎么用?Java Keccak使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
Keccak类属于org.bouncycastle.jcajce.provider.digest包,在下文中一共展示了Keccak类的9个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的Java代码示例。
示例1: getTransactionHash
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
/***
* Calculates the hash of a transaction. Note this requires that you have Bouncy castle as a dependency in your project
*
* @param eTrans transaction
* @return transaction hash as KECCAK-256
*/
public static byte[] getTransactionHash(EthereumTransaction eTrans) {
ArrayList<byte[]> rlpTransaction = new ArrayList<>();
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getNonce()));
rlpTransaction.add(EthereumUtil.encodeRLPElement(EthereumUtil.convertLongToVarInt(eTrans.getGasPrice())));
rlpTransaction.add(EthereumUtil.encodeRLPElement(EthereumUtil.convertLongToVarInt(eTrans.getGasLimit())));
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getReceiveAddress()));
rlpTransaction.add(EthereumUtil.encodeRLPElement(EthereumUtil.convertLongToVarInt(eTrans.getValue())));
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getData()));
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getSig_v()));
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getSig_r()));
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getSig_s()));
byte[] transEnc = EthereumUtil.encodeRLPList(rlpTransaction);
Keccak.Digest256 digest = new Keccak.Digest256();
digest.update(transEnc,0,transEnc.length);
return digest.digest();
}
开发者ID:ZuInnoTe,项目名称:hadoopcryptoledger,代码行数:23,代码来源:EthereumUtil.java
示例2: isValidChecksum
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
/**
* Checks if the given string is an address with checksum (Keccak256).
*
* @param address a wallet address ('0x...')
* @return {@code true} if address with checksum
*/
static boolean isValidChecksum(String address) {
Keccak.Digest256 digest256 = new Keccak.Digest256();
digest256.update(
address.substring(2).toLowerCase().getBytes());
String hash = Hex.toHexString(digest256.digest());
for (int i = 0; i < 40; i++) {
char ch = address.charAt(i + 2);
int dg = Character.digit(hash.charAt(i), 16);
if ((dg > 7 && Character.toUpperCase(ch) != ch)
|| (dg <= 7 && Character.toLowerCase(ch) != ch))
return false;
}
return true;
}
开发者ID:infinitape,项目名称:etherjar,代码行数:26,代码来源:Address.java
示例3: sha3
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
public static byte[] sha3(byte[]... input) {
Keccak.DigestKeccak kecc = new Keccak.Digest256();
for (byte[] bytes : input) {
kecc.update(bytes, 0, bytes.length);
}
return kecc.digest();
}
开发者ID:papyrusglobal,项目名称:state-channels,代码行数:8,代码来源:CryptoUtil.java
示例4: getTransactionHashWithoutSignature
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
/***
* Calculates the hash of a transaction without signature. Note this requires that you have Bouncy castle as a dependency in your project
*
* @param eTrans transaction
* @return transaction hash as KECCAK-256
*/
public static byte[] getTransactionHashWithoutSignature(EthereumTransaction eTrans) {
ArrayList<byte[]> rlpTransaction = new ArrayList<>();
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getNonce()));
rlpTransaction.add(EthereumUtil.encodeRLPElement(EthereumUtil.convertLongToVarInt(eTrans.getGasPrice())));
rlpTransaction.add(EthereumUtil.encodeRLPElement(EthereumUtil.convertLongToVarInt(eTrans.getGasLimit())));
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getReceiveAddress()));
rlpTransaction.add(EthereumUtil.encodeRLPElement(EthereumUtil.convertLongToVarInt(eTrans.getValue())));
rlpTransaction.add(EthereumUtil.encodeRLPElement(eTrans.getData()));
byte[] transEnc = EthereumUtil.encodeRLPList(rlpTransaction);
Keccak.Digest256 digest = new Keccak.Digest256();
digest.update(transEnc,0,transEnc.length);
return digest.digest();
}
开发者ID:ZuInnoTe,项目名称:hadoopcryptoledger,代码行数:20,代码来源:EthereumUtil.java
示例5: fromSignature
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
public static MethodId fromSignature(String name, Collection<String> types) {
String sign = Objects.requireNonNull(name) +
'(' + String.join(",", Objects.requireNonNull(types)) + ')';
byte[] head = new byte[SIZE_BYTES];
Keccak.Digest256 digest256 = new Keccak.Digest256();
digest256.update(sign.getBytes());
System.arraycopy(digest256.digest(), 0, head, 0, SIZE_BYTES);
return from(head);
}
开发者ID:infinitape,项目名称:etherjar,代码行数:13,代码来源:MethodId.java
示例6: toChecksumString
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
public String toChecksumString() {
Keccak.Digest256 digest256 = new Keccak.Digest256();
byte[] hex = new byte[value.length * 2];
for(int i = 0, j = 0; i < value.length; i++){
hex[j++] = HEX_BYTES[(0xF0 & value[i]) >>> 4];
hex[j++] = HEX_BYTES[0x0F & value[i]];
}
digest256.update(hex);
String hash = Hex.toHexString(digest256.digest());
char[] plain = toHex().toCharArray();
char[] str = new char[hex.length + 2];
if (plain.length != str.length) {
throw new IllegalStateException("Hex representation has invalid length: " + plain.length + " != " + str.length);
}
str[0] = '0';
str[1] = 'x';
for (int i = 0; i < 40; i++) {
int dg = Character.digit(hash.charAt(i), 16);
if (dg > 7) {
str[i + 2] = Character.toUpperCase(plain[i + 2]);
} else {
str[i + 2] = plain[i + 2];
}
}
return new String(str);
}
开发者ID:infinitape,项目名称:etherjar,代码行数:29,代码来源:Address.java
示例7: hashKeccak
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
/**
* Generates a SHA-3 hash on the provided data.
*
* @param data Hex data encoded in a string.
* @return Hash encoded in a hex string.
*/
public static String hashKeccak(String data) {
byte[] dataBytes = ByteUtilities.toByteArray(data);
Keccak.DigestKeccak md = new Keccak.DigestKeccak(256);
md.reset();
md.update(dataBytes, 0, dataBytes.length);
byte[] hashedBytes = md.digest();
return ByteUtilities.toHexString(hashedBytes);
}
开发者ID:Braveno,项目名称:cosigner,代码行数:15,代码来源:EthereumTools.java
示例8: getSendAddress
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
/**
* Calculates the sent address of an EthereumTransaction. Note this can be a costly operation to calculate. . This requires that you have Bouncy castle as a dependency in your project
*
*
* @param eTrans transaction
* @return sent address as byte array
*/
public static byte[] getSendAddress(EthereumTransaction eTrans) {
// init, maybe we move this out to save time
X9ECParameters params = SECNamedCurves.getByName("secp256k1");
ECDomainParameters CURVE=new ECDomainParameters(params.getCurve(), params.getG(), params.getN(), params.getH()); // needed for getSentAddress
// transaction hash without signature data
byte[] transactionHash = EthereumUtil.getTransactionHashWithoutSignature(eTrans);
// signature to address
BigInteger bR = new BigInteger(1,eTrans.getSig_r());
BigInteger bS = new BigInteger(1,eTrans.getSig_s());
// calculate v for signature
byte v =(byte) (eTrans.getSig_v()[0]);
if (!((v == EthereumUtil.LOWER_REAL_V) || (v== (LOWER_REAL_V+1)))) {
v = EthereumUtil.LOWER_REAL_V;
if (((int)v%2 == 0)) {
v = (byte) (v+0x01);
}
}
boolean compressedKey= false;
// the following lines are inspired from ECKey.java of EthereumJ, but adapted to the hadoopcryptoledger context
if (v < 27 || v > 34) {
throw new RuntimeException("Header out of range");
}
if (v>=31) {
compressedKey = true;
v -=4;
}
int receiverId = v - 27;
BigInteger n = CURVE.getN();
BigInteger i = BigInteger.valueOf((long) receiverId / 2);
BigInteger x = bR.add(i.multiply(n));
ECCurve.Fp curve = (ECCurve.Fp) CURVE.getCurve();
BigInteger prime = curve.getQ();
if (x.compareTo(prime) >= 0) {
return null;
}
// decompress Key
X9IntegerConverter x9 = new X9IntegerConverter();
byte[] compEnc = x9.integerToBytes(x, 1 + x9.getByteLength(CURVE.getCurve()));
boolean yBit=(receiverId & 1) == 1;
compEnc[0] = (byte)(yBit ? 0x03 : 0x02);
ECPoint R = CURVE.getCurve().decodePoint(compEnc);
if (!R.multiply(n).isInfinity()) {
return null;
}
BigInteger e = new BigInteger(1,transactionHash);
BigInteger eInv = BigInteger.ZERO.subtract(e).mod(n);
BigInteger rInv = bR.modInverse(n);
BigInteger srInv = rInv.multiply(bS).mod(n);
BigInteger eInvrInv = rInv.multiply(eInv).mod(n);
ECPoint.Fp q = (ECPoint.Fp) ECAlgorithms.sumOfTwoMultiplies(CURVE.getG(), eInvrInv, R, srInv);
byte[] pubKey=q.getEncoded(false);
// now we need to convert the public key into an ethereum sent address which is the last 20 bytes of 32 byte KECCAK-256 Hash of the key.
Keccak.Digest256 digest256 = new Keccak.Digest256();
digest256.update(pubKey,1,pubKey.length-1);
byte[] kcck = digest256.digest();
return Arrays.copyOfRange(kcck,12,kcck.length);
}
开发者ID:ZuInnoTe,项目名称:hadoopcryptoledger,代码行数:67,代码来源:EthereumUtil.java
示例9: sha3
import org.bouncycastle.jcajce.provider.digest.Keccak; //导入依赖的package包/类
/**
* Keccak-256 hash function.
*
* @param input binary encoded input data
* @param offset of start of data
* @param length of data
* @return hash value
*/
public static byte[] sha3(byte[] input, int offset, int length) {
Keccak.DigestKeccak kecc = new Keccak.Digest256();
kecc.update(input, offset, length);
return kecc.digest();
}
开发者ID:web3j,项目名称:web3j,代码行数:14,代码来源:Hash.java
注:本文中的org.bouncycastle.jcajce.provider.digest.Keccak类示例整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。 |
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