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package org.spongycastle.asn1.x9;
import java.math.BigInteger;
import org.spongycastle.math.ec.ECCurve;
import org.spongycastle.math.ec.ECFieldElement;
public class X9IntegerConverter
{
public int getByteLength(
ECCurve c)
{
return (c.getFieldSize() + 7) / 8;
}
public int getByteLength(
ECFieldElement fe)
{
return (fe.getFieldSize() + 7) / 8;
}
public byte[] integerToBytes(
BigInteger s,
int qLength)
{
byte[] bytes = s.toByteArray();
if (qLength < bytes.length)
{
byte[] tmp = new byte[qLength];
System.arraycopy(bytes, bytes.length - tmp.length, tmp, 0, tmp.length);
return tmp;
}
else if (qLength > bytes.length)
{
byte[] tmp = new byte[qLength];
System.arraycopy(bytes, 0, tmp, tmp.length - bytes.length, bytes.length);
return tmp;
}
return bytes;
}
}
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