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

Example 1 with EdDSAPublicKey

use of net.i2p.crypto.eddsa.EdDSAPublicKey in project mxisd by kamax-io.

the class KeyManager method build.

@PostConstruct
public void build() {
    try {
        keySpecs = EdDSANamedCurveTable.getByName(EdDSANamedCurveTable.CURVE_ED25519_SHA512);
        signEngine = new EdDSAEngine(MessageDigest.getInstance(keySpecs.getHashAlgorithm()));
        keys = new ArrayList<>();
        Path privKey = Paths.get(keyCfg.getPath());
        if (!Files.exists(privKey)) {
            KeyPair pair = (new KeyPairGenerator()).generateKeyPair();
            String keyEncoded = Base64.getEncoder().encodeToString(pair.getPrivate().getEncoded());
            FileUtils.writeStringToFile(privKey.toFile(), keyEncoded, StandardCharsets.ISO_8859_1);
            keys.add(pair);
        } else {
            if (Files.isDirectory(privKey)) {
                throw new RuntimeException("Invalid path for private key: " + privKey.toString());
            }
            if (Files.isReadable(privKey)) {
                byte[] seed = Base64.getDecoder().decode(FileUtils.readFileToString(privKey.toFile(), StandardCharsets.ISO_8859_1));
                EdDSAPrivateKeySpec privKeySpec = new EdDSAPrivateKeySpec(seed, keySpecs);
                EdDSAPublicKeySpec pubKeySpec = new EdDSAPublicKeySpec(privKeySpec.getA(), keySpecs);
                keys.add(new KeyPair(new EdDSAPublicKey(pubKeySpec), new EdDSAPrivateKey(privKeySpec)));
            }
        }
    } catch (NoSuchAlgorithmException | IOException e) {
        throw new RuntimeException(e);
    }
}

Example 2 with EdDSAPublicKey

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

the class SigUtil method toJavaEdDSAKey.

/**
 *  @return JAVA EdDSA public key!
 *  @since 0.9.15
 */
public static EdDSAPublicKey toJavaEdDSAKey(SigningPublicKey pk) throws GeneralSecurityException {
    EdDSAPublicKey rv;
    synchronized (_EdPubkeyCache) {
        rv = _EdPubkeyCache.get(pk);
    }
    if (rv != null)
        return rv;
    rv = cvtToJavaEdDSAKey(pk);
    synchronized (_EdPubkeyCache) {
        _EdPubkeyCache.put(pk, rv);
    }
    return rv;
}

Example 3 with EdDSAPublicKey

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

the class SigUtil method fromJavaKey.

/**
 *  Use if SigType is unknown.
 *  For efficiency, use fromJavakey(pk, type) if type is known.
 *
 *  @param pk JAVA key!
 *  @throws IllegalArgumentException on unknown type
 *  @since 0.9.18
 */
public static SigningPublicKey fromJavaKey(PublicKey pk) throws GeneralSecurityException {
    if (pk instanceof DSAPublicKey) {
        return fromJavaKey((DSAPublicKey) pk);
    }
    if (pk instanceof ECPublicKey) {
        ECPublicKey k = (ECPublicKey) pk;
        AlgorithmParameterSpec spec = k.getParams();
        SigType type;
        if (spec.equals(SigType.ECDSA_SHA256_P256.getParams()))
            type = SigType.ECDSA_SHA256_P256;
        else if (spec.equals(SigType.ECDSA_SHA384_P384.getParams()))
            type = SigType.ECDSA_SHA384_P384;
        else if (spec.equals(SigType.ECDSA_SHA512_P521.getParams()))
            type = SigType.ECDSA_SHA512_P521;
        else
            throw new IllegalArgumentException("Unknown EC type");
        return fromJavaKey(k, type);
    }
    if (pk instanceof EdDSAPublicKey) {
        return fromJavaKey((EdDSAPublicKey) pk, SigType.EdDSA_SHA512_Ed25519);
    }
    if (pk instanceof RSAPublicKey) {
        RSAPublicKey k = (RSAPublicKey) pk;
        int sz = k.getModulus().bitLength();
        SigType type;
        if (sz <= ((RSAKeyGenParameterSpec) SigType.RSA_SHA256_2048.getParams()).getKeysize())
            type = SigType.RSA_SHA256_2048;
        else if (sz <= ((RSAKeyGenParameterSpec) SigType.RSA_SHA384_3072.getParams()).getKeysize())
            type = SigType.RSA_SHA384_3072;
        else if (sz <= ((RSAKeyGenParameterSpec) SigType.RSA_SHA512_4096.getParams()).getKeysize())
            type = SigType.RSA_SHA512_4096;
        else
            throw new IllegalArgumentException("Unknown RSA type");
        return fromJavaKey(k, type);
    }
    throw new IllegalArgumentException("Unknown type: " + pk.getClass());
}

Example 4 with EdDSAPublicKey

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

the class KeyGenerator method getSigningPublicKey.

/**
 * Convert a SigningPrivateKey to a SigningPublicKey.
 *  As of 0.9.16, supports all key types.
 *
 * @param priv a SigningPrivateKey object
 * @return a SigningPublicKey object
 * @throws IllegalArgumentException on bad key or unknown type
 */
public static SigningPublicKey getSigningPublicKey(SigningPrivateKey priv) {
    SigType type = priv.getType();
    if (type == null)
        throw new IllegalArgumentException("Unknown type");
    try {
        switch(type.getBaseAlgorithm()) {
            case DSA:
                BigInteger x = new NativeBigInteger(1, priv.toByteArray());
                BigInteger y = CryptoConstants.dsag.modPow(x, CryptoConstants.dsap);
                SigningPublicKey pub = new SigningPublicKey();
                pub.setData(SigUtil.rectify(y, SigningPublicKey.KEYSIZE_BYTES));
                return pub;
            case EC:
                ECPrivateKey ecpriv = SigUtil.toJavaECKey(priv);
                BigInteger s = ecpriv.getS();
                ECParameterSpec spec = (ECParameterSpec) type.getParams();
                EllipticCurve curve = spec.getCurve();
                ECPoint g = spec.getGenerator();
                ECPoint w = ECUtil.scalarMult(g, s, curve);
                ECPublicKeySpec ecks = new ECPublicKeySpec(w, ecpriv.getParams());
                KeyFactory eckf = KeyFactory.getInstance("EC");
                ECPublicKey ecpub = (ECPublicKey) eckf.generatePublic(ecks);
                return SigUtil.fromJavaKey(ecpub, type);
            case RSA:
                RSAPrivateKey rsapriv = SigUtil.toJavaRSAKey(priv);
                BigInteger exp = ((RSAKeyGenParameterSpec) type.getParams()).getPublicExponent();
                RSAPublicKeySpec rsaks = new RSAPublicKeySpec(rsapriv.getModulus(), exp);
                KeyFactory rsakf = KeyFactory.getInstance("RSA");
                RSAPublicKey rsapub = (RSAPublicKey) rsakf.generatePublic(rsaks);
                return SigUtil.fromJavaKey(rsapub, type);
            case EdDSA:
                EdDSAPrivateKey epriv = SigUtil.toJavaEdDSAKey(priv);
                EdDSAPublicKey epub = new EdDSAPublicKey(new EdDSAPublicKeySpec(epriv.getA(), epriv.getParams()));
                return SigUtil.fromJavaKey(epub, type);
            default:
                throw new IllegalArgumentException("Unsupported algorithm");
        }
    } catch (GeneralSecurityException gse) {
        throw new IllegalArgumentException("Conversion failed", gse);
    }
}