Examples with ECGenParameterSpec java.security.spec.ECGenParameterSpec used on opensource projects

Example 41 with ECGenParameterSpec

use of java.security.spec.ECGenParameterSpec in project xipki by xipki.

the class CaClientExample method generateEcKeypair.

protected static MyKeypair generateEcKeypair() throws GeneralSecurityException {
    KeyPairGenerator kpGen = KeyPairGenerator.getInstance("EC");
    ECGenParameterSpec spec = new ECGenParameterSpec("secp256r1");
    kpGen.initialize(spec);
    KeyPair kp = kpGen.generateKeyPair();
    ECPublicKey pub = (ECPublicKey) kp.getPublic();
    byte[] keyData = new byte[65];
    keyData[0] = 4;
    copyArray(pub.getW().getAffineX().toByteArray(), keyData, 1, 32);
    copyArray(pub.getW().getAffineY().toByteArray(), keyData, 33, 32);
    AlgorithmIdentifier algId = new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, SECObjectIdentifiers.secp256r1);
    SubjectPublicKeyInfo subjectPublicKeyInfo = new SubjectPublicKeyInfo(algId, keyData);
    return new MyKeypair(kp.getPrivate(), subjectPublicKeyInfo);
}

Example 42 with ECGenParameterSpec

use of java.security.spec.ECGenParameterSpec in project fitpay-android-sdk by fitpay.

the class KeysManager method createECCKeyPair.

// Create the public and private keys
private ECCKeyPair createECCKeyPair() throws Exception {
    KeyPairGenerator keyGenerator = KeyPairGenerator.getInstance(ALGORITHM, SecurityProvider.getInstance().getProvider());
    keyGenerator.initialize(new ECGenParameterSpec(EC_CURVE), new SecureRandom());
    KeyPair keyPair = keyGenerator.generateKeyPair();
    ECPublicKey publicKey = (ECPublicKey) keyPair.getPublic();
    ECPrivateKey privateKey = (ECPrivateKey) keyPair.getPrivate();
    ECCKeyPair eccKeyPair = new ECCKeyPair();
    eccKeyPair.setKeyId(UUID.randomUUID().toString());
    eccKeyPair.setPrivateKey(Hex.bytesToHexString(privateKey.getEncoded()));
    eccKeyPair.setPublicKey(Hex.bytesToHexString(publicKey.getEncoded()));
    return eccKeyPair;
}

Example 43 with ECGenParameterSpec

use of java.security.spec.ECGenParameterSpec in project leshan by eclipse.

the class SecurityDeserializer method deserialize.

@Override
public SecurityInfo deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
    if (json == null) {
        return null;
    }
    SecurityInfo info = null;
    if (json.isJsonObject()) {
        JsonObject object = (JsonObject) json;
        String endpoint;
        if (object.has("endpoint")) {
            endpoint = object.get("endpoint").getAsString();
        } else {
            throw new JsonParseException("Missing endpoint");
        }
        JsonObject psk = (JsonObject) object.get("psk");
        JsonObject rpk = (JsonObject) object.get("rpk");
        JsonPrimitive x509 = object.getAsJsonPrimitive("x509");
        if (psk != null) {
            // PSK Deserialization
            String identity;
            if (psk.has("identity")) {
                identity = psk.get("identity").getAsString();
            } else {
                throw new JsonParseException("Missing PSK identity");
            }
            byte[] key;
            try {
                key = Hex.decodeHex(psk.get("key").getAsString().toCharArray());
            } catch (IllegalArgumentException e) {
                throw new JsonParseException("key parameter must be a valid hex string", e);
            }
            info = SecurityInfo.newPreSharedKeyInfo(endpoint, identity, key);
        } else if (rpk != null) {
            PublicKey key;
            try {
                byte[] x = Hex.decodeHex(rpk.get("x").getAsString().toCharArray());
                byte[] y = Hex.decodeHex(rpk.get("y").getAsString().toCharArray());
                String params = rpk.get("params").getAsString();
                AlgorithmParameters algoParameters = AlgorithmParameters.getInstance("EC");
                algoParameters.init(new ECGenParameterSpec(params));
                ECParameterSpec parameterSpec = algoParameters.getParameterSpec(ECParameterSpec.class);
                KeySpec keySpec = new ECPublicKeySpec(new ECPoint(new BigInteger(x), new BigInteger(y)), parameterSpec);
                key = KeyFactory.getInstance("EC").generatePublic(keySpec);
            } catch (IllegalArgumentException | InvalidKeySpecException | NoSuchAlgorithmException | InvalidParameterSpecException e) {
                throw new JsonParseException("Invalid security info content", e);
            }
            info = SecurityInfo.newRawPublicKeyInfo(endpoint, key);
        } else if (x509 != null && x509.getAsBoolean()) {
            info = SecurityInfo.newX509CertInfo(endpoint);
        } else {
            throw new JsonParseException("Invalid security info content");
        }
    }
    return info;
}

Example 44 with ECGenParameterSpec

use of java.security.spec.ECGenParameterSpec in project web3sdk by FISCO-BCOS.

the class Keys method createSecp256k1KeyPair.

static KeyPair createSecp256k1KeyPair(SecureRandom random) throws NoSuchProviderException, NoSuchAlgorithmException, InvalidAlgorithmParameterException {
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("ECDSA", "BC");
    ECGenParameterSpec ecGenParameterSpec = new ECGenParameterSpec("secp256k1");
    if (random != null) {
        keyPairGenerator.initialize(ecGenParameterSpec, random);
    } else {
        keyPairGenerator.initialize(ecGenParameterSpec);
    }
    return keyPairGenerator.generateKeyPair();
}

Example 45 with ECGenParameterSpec

use of java.security.spec.ECGenParameterSpec in project zookeeper by apache.

the class X509TestHelpers method generateECKeyPair.

/**
 * Generates an elliptic curve key pair using the "secp256r1" aka "prime256v1" aka "NIST P-256" curve.
 * @return the key pair.
 */
public static KeyPair generateECKeyPair() throws GeneralSecurityException {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("EC");
    keyGen.initialize(new ECGenParameterSpec(DEFAULT_ELLIPTIC_CURVE_NAME), PRNG);
    return keyGen.generateKeyPair();
}