Examples with SecretKeyFactory javax.crypto.SecretKeyFactory used on opensource projects

Example 26 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project android-delicious by lexs.

the class ObscuredSharedPreferences method decrypt.

protected String decrypt(String value) {
    try {
        final byte[] bytes = value != null ? Base64.decode(value, Base64.DEFAULT) : new byte[0];
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey key = keyFactory.generateSecret(new PBEKeySpec(secret));
        Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
        pbeCipher.init(Cipher.DECRYPT_MODE, key, new PBEParameterSpec(getSalt(), 20));
        return new String(pbeCipher.doFinal(bytes), UTF8);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

Example 27 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project android-delicious by lexs.

the class ObscuredSharedPreferences method encrypt.

protected String encrypt(String value) {
    try {
        final byte[] bytes = value != null ? value.getBytes(UTF8) : new byte[0];
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
        SecretKey key = keyFactory.generateSecret(new PBEKeySpec(secret));
        Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
        pbeCipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(getSalt(), 20));
        return new String(Base64.encode(pbeCipher.doFinal(bytes), Base64.NO_WRAP), UTF8);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

Example 28 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project KJFrameForAndroid by kymjs.

the class CipherUtils method getDESKey.

/**
     * 返回可逆算法DES的密钥
     * 
     * @param key
     *            前8字节将被用来生成密钥。
     * @return 生成的密钥
     * @throws Exception
     */
public static Key getDESKey(byte[] key) throws Exception {
    DESKeySpec des = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    return keyFactory.generateSecret(des);
}

Example 29 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project Lazy by l123456789jy.

the class DES method encrypt.

/**
	 * 将字符串进行DES加密
	 * @param source 未加密源字符串
	 * @return 加密后字符串
	 */
public String encrypt(String source) {
    byte[] retByte = null;
    // Create SecretKey object
    DESKeySpec dks = null;
    try {
        dks = new DESKeySpec(KEY);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
        SecretKey securekey = keyFactory.generateSecret(dks);
        // Create IvParameterSpec object with initialization vector
        IvParameterSpec spec = new IvParameterSpec(IV);
        // Create Cipter object
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        // Initialize Cipher object
        cipher.init(Cipher.ENCRYPT_MODE, securekey, spec);
        // Decrypting data
        retByte = cipher.doFinal(source.getBytes());
        String result = "";
        if (code == 0) {
            result = new String(retByte, "ISO-8859-1");
        } else if (code == 1) {
            result = Base64.encodeToString(retByte, false);
        } else {
            result = new String(retByte);
        }
        return result;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

Example 30 with SecretKeyFactory

use of javax.crypto.SecretKeyFactory in project Lazy by l123456789jy.

the class DES method decrypt.

/**
	 * 将DES加密的字符串解密
	 * @param encrypted 加密过的字符串
	 * @return 未加密源字符串
	 */
public String decrypt(String encrypted) {
    byte[] retByte = null;
    // Create SecretKey object
    DESKeySpec dks = null;
    try {
        dks = new DESKeySpec(KEY);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
        SecretKey securekey = keyFactory.generateSecret(dks);
        // Create IvParameterSpec object with initialization vector
        IvParameterSpec spec = new IvParameterSpec(IV);
        // Create Cipter object
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        // Initialize Cipher object
        cipher.init(Cipher.DECRYPT_MODE, securekey, spec);
        if (code == 0) {
            retByte = encrypted.getBytes("ISO-8859-1");
        } else if (code == 1) {
            retByte = Base64.decode(encrypted);
        } else {
            retByte = encrypted.getBytes();
        }
        // Decrypting data
        retByte = cipher.doFinal(retByte);
        return new String(retByte, "utf-8");
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}