本文整理汇总了Java中net.i2p.crypto.eddsa.math.ScalarOps.multiplyAndAdd方法的典型用法代码示例。如果您正苦于以下问题：Java ScalarOps.multiplyAndAdd方法的具体用法？Java ScalarOps.multiplyAndAdd怎么用？Java ScalarOps.multiplyAndAdd使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类net.i2p.crypto.eddsa.math.ScalarOps的用法示例。
在下文中一共展示了ScalarOps.multiplyAndAdd方法的3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，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: engineSign
import net.i2p.crypto.eddsa.math.ScalarOps; //导入方法依赖的package包/类
@Override
protected byte[] engineSign() throws SignatureException {
Curve curve = key.getParams().getCurve();
ScalarOps sc = key.getParams().getScalarOps();
byte[] a = ((EdDSAPrivateKey) key).geta();
byte[] message = baos.toByteArray();
// r = H(h_b,...,h_2b-1,M)
byte[] r = digest.digest(message);
// r mod l
// Reduces r from 64 bytes to 32 bytes
r = sc.reduce(r);
// R = rB
GroupElement R = key.getParams().getB().scalarMultiply(r);
byte[] Rbyte = R.toByteArray();
// S = (r + H(Rbar,Abar,M)*a) mod l
digest.update(Rbyte);
digest.update(((EdDSAPrivateKey) key).getAbyte());
byte[] h = digest.digest(message);
h = sc.reduce(h);
byte[] S = sc.multiplyAndAdd(h, a, r);
// R+S
int b = curve.getField().getb();
ByteBuffer out = ByteBuffer.allocate(b/4);
out.put(Rbyte).put(S);
return out.array();
}
示例2: x_engineSign
import net.i2p.crypto.eddsa.math.ScalarOps; //导入方法依赖的package包/类
private byte[] x_engineSign() throws SignatureException {
Curve curve = key.getParams().getCurve();
ScalarOps sc = key.getParams().getScalarOps();
byte[] a = ((EdDSAPrivateKey) key).geta();
byte[] message;
int offset, length;
if (oneShotMode) {
if (oneShotBytes == null)
throw new SignatureException("update() not called first");
message = oneShotBytes;
offset = oneShotOffset;
length = oneShotLength;
} else {
if (baos == null)
message = new byte[0];
else
message = baos.toByteArray();
offset = 0;
length = message.length;
}
// r = H(h_b,...,h_2b-1,M)
digest.update(message, offset, length);
byte[] r = digest.digest();
// r mod l
// Reduces r from 64 bytes to 32 bytes
r = sc.reduce(r);
// R = rB
GroupElement R = key.getParams().getB().scalarMultiply(r);
byte[] Rbyte = R.toByteArray();
// S = (r + H(Rbar,Abar,M)*a) mod l
digest.update(Rbyte);
digest.update(((EdDSAPrivateKey) key).getAbyte());
digest.update(message, offset, length);
byte[] h = digest.digest();
h = sc.reduce(h);
byte[] S = sc.multiplyAndAdd(h, a, r);
// R+S
int b = curve.getField().getb();
ByteBuffer out = ByteBuffer.allocate(b / 4);
out.put(Rbyte).put(S);
return out.array();
}
示例3: x_engineSign
import net.i2p.crypto.eddsa.math.ScalarOps; //导入方法依赖的package包/类
private byte[] x_engineSign() throws SignatureException {
Curve curve = key.getParams().getCurve();
ScalarOps sc = key.getParams().getScalarOps();
byte[] a = ((EdDSAPrivateKey) key).geta();
byte[] message;
int offset, length;
if (oneShotMode) {
if (oneShotBytes == null)
throw new SignatureException("update() not called first");
message = oneShotBytes;
offset = oneShotOffset;
length = oneShotLength;
} else {
if (baos == null)
message = new byte[0];
else
message = baos.toByteArray();
offset = 0;
length = message.length;
}
// r = H(h_b,...,h_2b-1,M)
digest.update(message, offset, length);
byte[] r = digest.digest();
// r mod l
// Reduces r from 64 bytes to 32 bytes
r = sc.reduce(r);
// R = rB
GroupElement R = key.getParams().getB().scalarMultiply(r);
byte[] Rbyte = R.toByteArray();
// S = (r + H(Rbar,Abar,M)*a) mod l
digest.update(Rbyte);
digest.update(((EdDSAPrivateKey) key).getAbyte());
digest.update(message, offset, length);
byte[] h = digest.digest();
h = sc.reduce(h);
byte[] S = sc.multiplyAndAdd(h, a, r);
// R+S
int b = curve.getField().getb();
ByteBuffer out = ByteBuffer.allocate(b/4);
out.put(Rbyte).put(S);
return out.array();
}