org.fisco.bcos.sdk.crypto.signature.SignatureResult Maven / Gradle / Ivy
/**
* Copyright 2014-2020 [fisco-dev]
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
*
http://www.apache.org/licenses/LICENSE-2.0
*
*
Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.fisco.bcos.sdk.crypto.signature;
import java.util.List;
import org.fisco.bcos.sdk.crypto.exceptions.SignatureException;
import org.fisco.bcos.sdk.rlp.RlpString;
import org.fisco.bcos.sdk.rlp.RlpType;
import org.fisco.bcos.sdk.utils.ByteUtils;
import org.fisco.bcos.sdk.utils.Hex;
public abstract class SignatureResult {
protected final byte[] r;
protected final byte[] s;
protected byte[] signatureBytes;
SignatureResult(final byte[] r, final byte[] s) {
this.r = r;
this.s = s;
}
/**
* Recover v, r, s from signature string The first 32 bytes are r, and the 32 bytes after r are
* s
*
* @param signatureString the signatureString
*/
SignatureResult(final String signatureString) {
this.signatureBytes = Hex.decode(signatureString);
// at least 64 bytes
if (this.signatureBytes.length < 64) {
throw new SignatureException(
"Invalid signature: "
+ signatureString
+ ", signatureString len: "
+ signatureString.length()
+ ", signatureBytes size:"
+ signatureBytes.length);
}
// get R
this.r = new byte[32];
System.arraycopy(this.signatureBytes, 0, this.r, 0, 32);
// get S
this.s = new byte[32];
System.arraycopy(this.signatureBytes, 32, this.s, 0, 32);
}
public byte[] getR() {
return r;
}
public byte[] getS() {
return s;
}
protected void encodeCommonField(List encodeResult) {
encodeResult.add(RlpString.create(ByteUtils.trimLeadingZeroes(this.getR())));
encodeResult.add(RlpString.create(ByteUtils.trimLeadingZeroes(this.getS())));
}
/**
* covert signatureResult into String
*
* @return signatureResult in string form can be used as a verify parameter
*/
public abstract String convertToString();
/**
* encode the signatureResult into rlp-list
*
* @return the encoded rlp-list with r, s, v( or pub)
*/
public abstract List encode();
}