Example usage for java.security KeyFactory getAlgorithm

List of usage examples for java.security KeyFactory getAlgorithm

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Introduction

In this page you can find the example usage for java.security KeyFactory getAlgorithm.

Prototype

public final String getAlgorithm()

Source Link

Document

Gets the name of the algorithm associated with this KeyFactory .

Usage

From source file:com.zxy.commons.codec.rsa.RSAUtils.java

/**
 * <p>//  w  w w .  j ava 2 s .c om
 * ?
 * </p>
 * 
 * @param data ??
 * @param privateKey ?(BASE64?)
 * @return byte
 * @throws Exception Exception
 */
public static byte[] encryptByPrivateKey(byte[] data, String privateKey) throws Exception {
    byte[] keyBytes = Base64.decodeBase64(privateKey);
    PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, privateK);
    int inputLen = data.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int index = 0;
    // ?
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
            cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(data, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        index++;
        offSet = index * MAX_ENCRYPT_BLOCK;
    }
    byte[] encryptedData = out.toByteArray();
    out.close();
    return encryptedData;
}

From source file:com.zxy.commons.codec.rsa.RSAUtils.java

/**
 * <P>/*from w w w . j  av  a2 s  . c  o  m*/
 * ?
 * </p>
 * 
 * @param encryptedData ?
 * @param privateKey ?(BASE64?)
 * @return byte
 * @throws Exception Exception
 */
@SuppressWarnings({ "PMD.ShortVariable", "PMD.AvoidDuplicateLiterals" })
public static byte[] decryptByPrivateKey(byte[] encryptedData, String privateKey) throws Exception {
    byte[] keyBytes = Base64.decodeBase64(privateKey);
    PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, privateK);
    int inputLen = encryptedData.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int i = 0;
    // ?
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
            cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        i++;
        offSet = i * MAX_DECRYPT_BLOCK;
    }
    byte[] decryptedData = out.toByteArray();
    out.close();
    return decryptedData;
}

From source file:hh.learnj.test.license.test.rsacoder.RSACoder.java

/**
 * //from w  w  w. ja v a 2 s .  c  o  m
 * 
 * @param data
 *            ?
 * @param key
 *            
 * @return byte[] ?
 */
public static byte[] decryptByPublicKey(byte[] data, byte[] key) throws Exception {

    // 
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    // ?
    // ???
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(key);
    // 
    PublicKey pubKey = keyFactory.generatePublic(x509KeySpec);
    // ?
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, pubKey);
    return cipher.doFinal(data);
}

From source file:hh.learnj.test.license.test.rsacoder.RSACoder.java

/**
 * /*from ww w  .  ja va 2  s .  c o m*/
 * 
 * @param data?
 * @param key
 *            
 * @return byte[] ?
 */
public static byte[] encryptByPublicKey(byte[] data, byte[] key) throws Exception {

    // 
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    // ?
    // ???
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(key);
    // 
    PublicKey pubKey = keyFactory.generatePublic(x509KeySpec);

    // ?
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, pubKey);
    return cipher.doFinal(data);
}

From source file:com.zxy.commons.codec.rsa.RSAUtils.java

/**
 * <p>/*  w ww.j a v a  2s. c om*/
 * 
 * </p>
 * 
 * @param data ??
 * @param publicKey (BASE64?)
 * @return byte
 * @throws Exception Exception
 */
public static byte[] encryptByPublicKey(byte[] data, String publicKey) throws Exception {
    byte[] keyBytes = Base64.decodeBase64(publicKey);
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key publicK = keyFactory.generatePublic(x509KeySpec);
    // ?
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, publicK);
    int inputLen = data.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int index = 0;
    // ?
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
            cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(data, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        index++;
        offSet = index * MAX_ENCRYPT_BLOCK;
    }
    byte[] encryptedData = out.toByteArray();
    out.close();
    return encryptedData;
}

From source file:gemlite.core.util.RSAUtils.java

/**
 * <p>//from  w  w w  .  j  a  v  a 2s. co m
 * 
 * </p>
 * 
 * @param encryptedData
 *          ?
 * @param publicKey
 *          (BASE64?)
 * @return
 * @throws Exception
 */
public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey) throws Exception {
    byte[] keyBytes = Base64Utils.decode(publicKey);
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key publicK = keyFactory.generatePublic(x509KeySpec);
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, publicK);
    int inputLen = encryptedData.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int i = 0;
    // ?
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
            cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        i++;
        offSet = i * MAX_DECRYPT_BLOCK;
    }
    byte[] decryptedData = out.toByteArray();
    out.close();
    return decryptedData;
}

From source file:gemlite.core.util.RSAUtils.java

/**
 * <P>/*w  w w  .j  a  v a2 s .  c  om*/
 * ?
 * </p>
 * 
 * @param encryptedData
 *          ?
 * @param privateKey
 *          ?(BASE64?)
 * @return
 * @throws Exception
 */
public static byte[] decryptByPrivateKey(byte[] encryptedData, String privateKey) throws Exception {
    byte[] keyBytes = Base64Utils.decode(privateKey);
    PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.DECRYPT_MODE, privateK);
    int inputLen = encryptedData.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int i = 0;
    // ?
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
            cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        i++;
        offSet = i * MAX_DECRYPT_BLOCK;
    }
    byte[] decryptedData = out.toByteArray();
    out.close();
    return decryptedData;
}

From source file:gemlite.core.util.RSAUtils.java

/**
 * <p>/*from   w  w w  . jav a 2s.  co  m*/
 * ?
 * </p>
 * 
 * @param data
 *          ??
 * @param privateKey
 *          ?(BASE64?)
 * @return
 * @throws Exception
 */
public static byte[] encryptByPrivateKey(byte[] data, String privateKey) throws Exception {
    byte[] keyBytes = Base64Utils.decode(privateKey);
    PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, privateK);
    int inputLen = data.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int i = 0;
    // ?
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
            cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(data, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        i++;
        offSet = i * MAX_ENCRYPT_BLOCK;
    }
    byte[] encryptedData = out.toByteArray();
    out.close();
    return encryptedData;
}

From source file:gemlite.core.util.RSAUtils.java

/**
 * <p>//from   w w  w  .  ja va2  s. c om
 * 
 * </p>
 * 
 * @param data
 *          ??
 * @param publicKey
 *          (BASE64?)
 * @return
 * @throws Exception
 */
public static byte[] encryptByPublicKey(byte[] data, String publicKey) throws Exception {
    byte[] keyBytes = Base64Utils.decode(publicKey);
    X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
    KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
    Key publicK = keyFactory.generatePublic(x509KeySpec);
    // ?
    Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
    cipher.init(Cipher.ENCRYPT_MODE, publicK);
    int inputLen = data.length;
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    int offSet = 0;
    byte[] cache;
    int i = 0;
    // ?
    while (inputLen - offSet > 0) {
        if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
            cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
        } else {
            cache = cipher.doFinal(data, offSet, inputLen - offSet);
        }
        out.write(cache, 0, cache.length);
        i++;
        offSet = i * MAX_ENCRYPT_BLOCK;
    }
    byte[] encryptedData = out.toByteArray();
    out.close();
    return encryptedData;
}