Example usage for javax.crypto Cipher init

List of usage examples for javax.crypto Cipher init

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Introduction

In this page you can find the example usage for javax.crypto Cipher init.

Prototype

public final void init(int opmode, Certificate certificate) throws InvalidKeyException

Source Link

Document

Initializes this cipher with the public key from the given certificate.

Usage

From source file:com.jsmartframework.web.manager.CsrfEncrypter.java

private static Cipher getEncryptCipher(HttpServletRequest request, String key) throws Exception {
    Cipher encryptCipher = (Cipher) request.getAttribute(REQUEST_CSRF_ENCRYPT_CIPHER);
    if (encryptCipher == null) {
        encryptCipher = Cipher.getInstance("AES");
        SecretKey secretKey = new SecretKeySpec(key.getBytes("UTF8"), "AES");
        encryptCipher.init(Cipher.ENCRYPT_MODE, secretKey);
        request.setAttribute(REQUEST_CSRF_ENCRYPT_CIPHER, encryptCipher);
    }//w  w  w .j  a  v a 2s  . c  o m
    return encryptCipher;
}

From source file:com.jsmartframework.web.manager.CsrfEncrypter.java

private static Cipher getDecryptCipher(HttpServletRequest request, String key) throws Exception {
    Cipher decryptCipher = (Cipher) request.getAttribute(REQUEST_CSRF_DECRYPT_CIPHER);
    if (decryptCipher == null) {
        decryptCipher = Cipher.getInstance("AES");
        SecretKey secretKey = new SecretKeySpec(key.getBytes("UTF8"), "AES");
        decryptCipher.init(Cipher.DECRYPT_MODE, secretKey);
        request.setAttribute(REQUEST_CSRF_DECRYPT_CIPHER, decryptCipher);
    }/*from   w w  w  .jav  a2 s.  c o  m*/
    return decryptCipher;
}

From source file:com.jsmartframework.web.manager.AuthEncrypter.java

private static Cipher getEncryptCipher(HttpServletRequest request, String key) throws Exception {
    Cipher encryptCipher = (Cipher) request.getAttribute(REQUEST_AUTH_ENCRYPT_CIPHER);
    if (encryptCipher == null) {
        encryptCipher = Cipher.getInstance("AES");
        SecretKey secretKey = new SecretKeySpec(key.getBytes("UTF8"), "AES");
        encryptCipher.init(Cipher.ENCRYPT_MODE, secretKey);
        request.setAttribute(REQUEST_AUTH_ENCRYPT_CIPHER, encryptCipher);
    }//from  w  ww  .jav a 2s  . c om
    return encryptCipher;
}

From source file:com.jsmartframework.web.manager.AuthEncrypter.java

private static Cipher getDecryptCipher(HttpServletRequest request, String key) throws Exception {
    Cipher decryptCipher = (Cipher) request.getAttribute(REQUEST_AUTH_DECRYPT_CIPHER);
    if (decryptCipher == null) {
        decryptCipher = Cipher.getInstance("AES");
        SecretKey secretKey = new SecretKeySpec(key.getBytes("UTF8"), "AES");
        decryptCipher.init(Cipher.DECRYPT_MODE, secretKey);
        request.setAttribute(REQUEST_AUTH_DECRYPT_CIPHER, decryptCipher);
    }// w  ww .j  a  va 2s . c  o m
    return decryptCipher;
}

From source file:com.lling.qiqu.utils.AesUtils.java

/**
 * Encrypts a message using a 128bit Bse64 key using AES.
 *
 * @param key     128bit Base64 AES key/*from w  ww.j  a va  2  s  . co  m*/
 * @param message Message to encrypt
 * @return hex encoded encrypted message
 */
public static String encrypt(String key, String message) {
    String encrypted = "";
    try {
        // Generate the secret key specs.
        byte[] keyArray = Base64.decodeBase64(key.getBytes());
        SecretKeySpec skeySpec = new SecretKeySpec(keyArray, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        byte[] encrypt = cipher.doFinal(message.getBytes());
        encrypted = new String(hexCodec.encode(encrypt));
    } catch (Exception e) {
        logger.error(e.getMessage(), e);
        throw new RuntimeException(e);
    }
    return encrypted;
}

From source file:com.lling.qiqu.utils.AesUtils.java

/**
 * Encrypts a message using a 128bit Bse64 key using AES.
 *
 * @param key     128bit Base64 AES key//  w  w  w .j  ava  2  s  .c o m
 * @param message Message to encrypt
 * @return bse64 encoded encrypted message
 */
public static String encryptBase64(String key, String message) {
    String encrypted = "";
    try {
        // Generate the secret key specs.
        byte[] keyArray = Base64.decodeBase64(key.getBytes());
        SecretKeySpec skeySpec = new SecretKeySpec(keyArray, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        byte[] encrypt = cipher.doFinal(message.getBytes());
        encrypted = new String(Base64.encodeBase64(encrypt));
    } catch (Exception e) {
        logger.error(e.getMessage(), e);
        throw new RuntimeException(e);
    }
    return encrypted;
}

From source file:com.lling.qiqu.utils.AesUtils.java

/**
 * Decrypts a AES ecrypted message with a Base64 128bit key
 *
 * @param key   AES Base64 128bit key// ww  w . ja  v a  2 s  .  c o  m
 * @param value hex encoded encrypted message to decrypt
 * @return the original message
 */
public static String decrypt(String key, String value) {
    String decrypted = "";
    try {
        // Get the KeyGenerator
        byte[] keyArray = Base64.decodeBase64(key.getBytes());
        SecretKeySpec skeySpec = new SecretKeySpec(keyArray, "AES");
        // Instantiate the cipher
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);

        // byte[] encrypted =
        // urlCodec.decode(value.getBytes(ICoreFrameworkConstants.DEFAULT_STRING_ENCODING));
        byte[] encrypted = hexCodec.decode(value.getBytes());
        byte[] original = cipher.doFinal(encrypted);
        decrypted = new String(original);
    } catch (Exception e) {
        logger.error(e.getMessage(), e);
        decrypted = "";
    }
    return decrypted;
}

From source file:com.lling.qiqu.utils.AesUtils.java

/**
 * Decrypts a AES ecrypted message with a Base64 128bit key
 *
 * @param key   AES Base64 128bit key/*from  www  .ja  v a2 s.c o  m*/
 * @param value Base64 encoded encrypted message to decrypt
 * @return the original message
 */
public static String decryptBase64(String key, String value) {
    String decrypted = "";
    try {
        // Get the KeyGenerator
        byte[] keyArray = Base64.decodeBase64(key.getBytes());
        SecretKeySpec skeySpec = new SecretKeySpec(keyArray, "AES");
        // Instantiate the cipher
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);

        // byte[] encrypted =
        // urlCodec.decode(value.getBytes(ICoreFrameworkConstants.DEFAULT_STRING_ENCODING));
        byte[] encrypted = Base64.decodeBase64(value.getBytes());
        byte[] original = cipher.doFinal(encrypted);
        decrypted = new String(original);
    } catch (Exception e) {
        logger.error(e.getMessage(), e);
        decrypted = "";
    }
    return decrypted;
}

From source file:com.dc.util.file.FileSupport.java

private static void copyEncryptedStream(InputStream input, OutputStream output, String key)
        throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
    Cipher dcipher = Cipher.getInstance("AES");
    CipherInputStream cis = null;
    try {//ww  w  .ja  v a2s . c o  m
        dcipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key.getBytes(), "AES"));
        cis = new CipherInputStream(input, dcipher);
        byte[] buffer = new byte[1024];
        int bytesRead;
        while ((bytesRead = cis.read(buffer)) != -1) {
            output.write(buffer, 0, bytesRead);
        }
        output.flush();
    } finally {
        if (cis != null) {
            cis.close();
        }
    }
}