Examples with X9IntegerConverter org.bouncycastle.asn1.x9.X9IntegerConverter used on opensource projects

Example 26 with X9IntegerConverter

use of org.bouncycastle.asn1.x9.X9IntegerConverter in project xdagj by XDagger.

the class Sign method decompressKey.

/**
 * Decompress a compressed public key (x co-ord and low-bit of y-coord).
 */
public static ECPoint decompressKey(BigInteger xBN, boolean yBit) {
    X9IntegerConverter x9 = new X9IntegerConverter();
    byte[] compEnc = x9.integerToBytes(xBN, 1 + x9.getByteLength(CURVE.getCurve()));
    compEnc[0] = (byte) (yBit ? 0x03 : 0x02);
    return CURVE.getCurve().decodePoint(compEnc);
}

Example 27 with X9IntegerConverter

use of org.bouncycastle.asn1.x9.X9IntegerConverter in project Elastos.DID.Java.SDK by elastos.

the class ECKey method decompressKey.

/**
 * Decompress a compressed public key (x co-ord and low-bit of y-coord).
 */
private static ECPoint decompressKey(BigInteger xBN, boolean yBit) {
    X9IntegerConverter x9 = new X9IntegerConverter();
    byte[] compEnc = x9.integerToBytes(xBN, 1 + x9.getByteLength(CURVE.getCurve()));
    compEnc[0] = (byte) (yBit ? 0x03 : 0x02);
    return CURVE.getCurve().decodePoint(compEnc);
}

Example 28 with X9IntegerConverter

use of org.bouncycastle.asn1.x9.X9IntegerConverter in project digital-asset-wallet by dingan-work.

the class SECP256K1 method decompressKey.

/**
 * Decompress a compressed public key (x co-ord and low-bit of y-coord).
 */
private static ECPoint decompressKey(final BigInteger xBN, final boolean yBit) {
    final X9IntegerConverter x9 = new X9IntegerConverter();
    final byte[] compEnc = x9.integerToBytes(xBN, 1 + x9.getByteLength(CURVE.getCurve()));
    compEnc[0] = (byte) (yBit ? 0x03 : 0x02);
    // Currently ECCurve#decodePoint throws an IllegalArgumentException.
    return CURVE.getCurve().decodePoint(compEnc);
}