Examples with EdDSAEngine net.i2p.crypto.eddsa.EdDSAEngine used on opensource projects

Example 6 with EdDSAEngine

use of net.i2p.crypto.eddsa.EdDSAEngine in project i2p.i2p by i2p.

the class DSAEngine method altSign.

/**
 *  Generic sign any type.
 *
 *  @throws GeneralSecurityException if algorithm unvailable or on other errors
 *  @since 0.9.9 added off/len 0.9.12
 */
private Signature altSign(byte[] data, int offset, int len, SigningPrivateKey privateKey) throws GeneralSecurityException {
    SigType type = privateKey.getType();
    if (type == SigType.DSA_SHA1)
        return altSignSHA1(data, offset, len, privateKey);
    PrivateKey privKey = SigUtil.toJavaKey(privateKey);
    byte[] sigbytes;
    if (type.getBaseAlgorithm() == SigAlgo.EdDSA) {
        // take advantage of one-shot mode
        EdDSAEngine jsig = new EdDSAEngine(type.getDigestInstance());
        jsig.initSign(privKey);
        sigbytes = jsig.signOneShot(data, offset, len);
    } else {
        java.security.Signature jsig = java.security.Signature.getInstance(type.getAlgorithmName());
        jsig.initSign(privKey, _context.random());
        jsig.update(data, offset, len);
        sigbytes = jsig.sign();
    }
    return SigUtil.fromJavaSig(sigbytes, type);
}