Examples with X509EncodedKeySpec java.security.spec.X509EncodedKeySpec used on opensource projects

Example 86 with X509EncodedKeySpec

use of java.security.spec.X509EncodedKeySpec in project xabber-android by redsolution.

the class AccountTable method getKeyPair.

private static KeyPair getKeyPair(Cursor cursor) {
    byte[] publicKeyBytes = cursor.getBlob(cursor.getColumnIndex(Fields.PUBLIC_KEY));
    byte[] privateKeyBytes = cursor.getBlob(cursor.getColumnIndex(Fields.PRIVATE_KEY));
    if (privateKeyBytes == null || publicKeyBytes == null) {
        return null;
    }
    X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes);
    PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);
    PublicKey publicKey;
    PrivateKey privateKey;
    KeyFactory keyFactory;
    try {
        keyFactory = KeyFactory.getInstance("DSA");
        publicKey = keyFactory.generatePublic(publicKeySpec);
        privateKey = keyFactory.generatePrivate(privateKeySpec);
    } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
        throw new RuntimeException(e);
    }
    return new KeyPair(publicKey, privateKey);
}

Example 87 with X509EncodedKeySpec

use of java.security.spec.X509EncodedKeySpec in project smartmodule by carozhu.

the class RSAUtils method getPublicKey.

/**
	 * 通过公钥byte[](publicKey.getEncoded())将公钥还原，适用于RSA算法
	 * 
	 * @param keyBytes
	 * @return
	 * @throws NoSuchAlgorithmException
	 * @throws InvalidKeySpecException
	 */
public static PublicKey getPublicKey(byte[] keyBytes) throws NoSuchAlgorithmException, InvalidKeySpecException {
    X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_PAIR);
    PublicKey publicKey = keyFactory.generatePublic(keySpec);
    return publicKey;
}

Example 88 with X509EncodedKeySpec

use of java.security.spec.X509EncodedKeySpec in project Jota-Text-Editor-old by jiro-aqua.

the class Security method generatePublicKey.

/**
     * Generates a PublicKey instance from a string containing the
     * Base64-encoded public key.
     *
     * @param encodedPublicKey Base64-encoded public key
     * @throws IllegalArgumentException if encodedPublicKey is invalid
     */
public static PublicKey generatePublicKey(String encodedPublicKey) {
    try {
        byte[] decodedKey = Base64.decode(encodedPublicKey);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_FACTORY_ALGORITHM);
        return keyFactory.generatePublic(new X509EncodedKeySpec(decodedKey));
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    } catch (InvalidKeySpecException e) {
        Log.e(TAG, "Invalid key specification.");
        throw new IllegalArgumentException(e);
    } catch (Base64DecoderException e) {
        Log.e(TAG, "Base64 decoding failed.");
        throw new IllegalArgumentException(e);
    }
}

Example 89 with X509EncodedKeySpec

use of java.security.spec.X509EncodedKeySpec in project cardslib by gabrielemariotti.

the class Security method generatePublicKey.

/**
     * Generates a PublicKey instance from a string containing the
     * Base64-encoded public key.
     *
     * @param encodedPublicKey Base64-encoded public key
     * @throws IllegalArgumentException if encodedPublicKey is invalid
     */
public static PublicKey generatePublicKey(String encodedPublicKey) {
    try {
        byte[] decodedKey = Base64.decode(encodedPublicKey);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_FACTORY_ALGORITHM);
        return keyFactory.generatePublic(new X509EncodedKeySpec(decodedKey));
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    } catch (InvalidKeySpecException e) {
        Log.e(TAG, "Invalid key specification.");
        throw new IllegalArgumentException(e);
    } catch (Base64DecoderException e) {
        Log.e(TAG, "Base64 decoding failed.");
        throw new IllegalArgumentException(e);
    }
}

Example 90 with X509EncodedKeySpec

use of java.security.spec.X509EncodedKeySpec in project translationstudio8 by heartsome.

the class InstallKeyEncrypt method encrypt.

public static byte[] encrypt(byte[] srcBytes) throws Exception {
    X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKey);
    KeyFactory kf = KeyFactory.getInstance(algorithm);
    PublicKey keyPublic = kf.generatePublic(keySpec);
    Cipher cipher;
    cipher = Cipher.getInstance(algorithm, new org.bouncycastle.jce.provider.BouncyCastleProvider());
    cipher.init(Cipher.ENCRYPT_MODE, keyPublic);
    int blockSize = cipher.getBlockSize();
    int outputSize = cipher.getOutputSize(srcBytes.length);
    int leavedSize = srcBytes.length % blockSize;
    int blocksSize = leavedSize != 0 ? srcBytes.length / blockSize + 1 : srcBytes.length / blockSize;
    byte[] raw = new byte[outputSize * blocksSize];
    int i = 0;
    while (srcBytes.length - i * blockSize > 0) {
        if (srcBytes.length - i * blockSize > blockSize)
            cipher.doFinal(srcBytes, i * blockSize, blockSize, raw, i * outputSize);
        else
            cipher.doFinal(srcBytes, i * blockSize, srcBytes.length - i * blockSize, raw, i * outputSize);
        i++;
    }
    return raw;
}