Example usage for org.apache.commons.net.util Base64 decode

Introduction

In this page you can find the example usage for org.apache.commons.net.util Base64 decode.

Prototype

public byte[] decode(byte[] pArray) 

Source Link

Document

Decodes a byte[] containing containing characters in the Base64 alphabet.

Usage

From source file:com.znsx.util.licence.LicenceUtil.java

/**
 * ???//from  w w  w. ja v  a 2s  .  co  m
 * 
 * @param data
 *            ??
 * @param publicKeyString
 *            ??base64?
 * @param signature
 *            base64????
 * @return
 * @throws Exception
 */
public static boolean verify(String data, String publicKeyString, String signature) throws Exception {
    // ???
    // BASE64Decoder decoder = new BASE64Decoder();
    // byte[] bytes = decoder.decodeBuffer(publicKeyString);
    Base64 base64 = new Base64();
    byte[] bytes = base64.decode(publicKeyString.getBytes("utf8"));
    X509EncodedKeySpec keySpec = new X509EncodedKeySpec(bytes);
    PublicKey publicKey = KeyFactory.getInstance("DSA").generatePublic(keySpec);
    // ?
    Signature sign = Signature.getInstance("DSA");
    sign.initVerify(publicKey);
    sign.update(data.getBytes("utf8"));
    // return sign.verify(decoder.decodeBuffer(signature));
    return sign.verify(base64.decode(signature.getBytes("utf8")));
}

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From source file:com.znsx.util.licence.LicenceUtil.java

/**
 * C#?????46?//from   ww  w.ja v a 2  s  .  c  om
 * 
 * @param sign
 *            base64????
 * @return ???
 * @throws Exception
 * @author huangbuji
 *         <p />
 *         Create at 2014-2-13 ?10:38:46
 */
public static byte[] changeDSANet2java(String sign) throws Exception {
    Base64 base64 = new Base64();
    byte tx[] = base64.decode(sign.getBytes("utf8"));

    byte[] tx_new = new byte[46];
    tx_new[0] = 48;
    tx_new[1] = 44;
    tx_new[2] = 2;
    tx_new[3] = 20;

    for (int x = 0; x < 20; x++) {
        tx_new[x + 4] = tx[x];
    }
    tx_new[24] = 2;
    tx_new[25] = 20;

    for (int x = 20; x < 40; x++) {
        tx_new[x + 6] = tx[x];
    }
    return tx_new;
}

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From source file:com.znsx.util.licence.LicenceUtil.java

/**
 * ?????//  www  . java  2s . c o m
 * 
 * @param data
 *            ??
 * @param privateKey
 *            ???base64?
 * @return base64????
 * @throws Exception
 */
public static String sign(String data, String privateKeyString) throws Exception {
    Base64 base64 = new Base64();
    // ????
    // BASE64Decoder decoder = new BASE64Decoder();
    // byte[] bytes = decoder.decodeBuffer(privateKeyString);
    byte[] bytes = base64.decode(privateKeyString.getBytes("utf8"));
    PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(bytes);
    PrivateKey privateKey = KeyFactory.getInstance("DSA").generatePrivate(keySpec);
    // ???
    Signature signature = Signature.getInstance("DSA");
    signature.initSign(privateKey);
    signature.update(data.getBytes("utf8"));
    // return new BASE64Encoder().encode(signature.sign());
    return new String(base64.encode(signature.sign()), "utf8");
}

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From source file:com.znsx.util.licence.LicenceUtil.java

/**
 * ???/*from  w  w w . j  a  v  a2s  .c  om*/
 * 
 * @param data
 *            ??
 * @param publicKey
 *            2
 * @param signature
 *            base64????
 * @return
 * @throws Exception
 * @author huangbuji
 *         <p />
 *         Create at 2014-2-12 ?5:37:18
 */
public static boolean verifyBinKey(String data, byte[] publicKey, String signature) throws Exception {
    Base64 base64 = new Base64();
    X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKey);
    PublicKey pub = KeyFactory.getInstance("DSA").generatePublic(keySpec);
    // ?
    Signature sign = Signature.getInstance("DSA");
    sign.initVerify(pub);
    sign.update(data.getBytes("utf8"));
    // return sign.verify(decoder.decodeBuffer(signature));
    return sign.verify(base64.decode(signature.getBytes("utf8")));
}

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