Example usage for com.google.common.hash Hashing sipHash24

Introduction

In this page you can find the example usage for com.google.common.hash Hashing sipHash24.

Prototype

public static HashFunction sipHash24() 

Source Link

Document

Returns a hash function implementing the <a href="https://131002.net/siphash/">64-bit SipHash-2-4 algorithm</a> using a seed value of k = 00 01 02 ...

Usage

From source file:app.service.AuthService.java

protected CryptoToken newSessionToken(AccountSession session, boolean isExpire) {
    Funnel<AccountSession> sessionFunnel = isExpire ? mExpireSessionFunnel : mRefreshSessionFunnel;
    byte[] data = Hashing.sipHash24().hashObject(session, sessionFunnel).asBytes();
    String sessionString = new String(data, Charset.forName("UTF-8"));
    session.setSession(sessionString);/*from   w  ww.j av  a  2s.  c  o m*/
    CryptoToken token;
    try {
        byte[] sessionData = mObjectMapper.writeValueAsBytes(session);
        token = Crypto.encrypt(sessionData);
    } catch (Exception e) {
        logger.warn("encrypt session failure", e);
        return null;
    }
    return token;
}

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From source file:app.service.AuthService.java

protected AccountSession getSessionWithCheck(CryptoToken cryptoToken, boolean isExpire) {
    Funnel<AccountSession> sessionFunnel = isExpire ? mExpireSessionFunnel : mRefreshSessionFunnel;
    AccountSession session;/*ww w.  j  a  va2 s .c o  m*/
    try {
        byte[] json = Crypto.decrypt(cryptoToken);
        session = mObjectMapper.readValue(json, AccountSession.class);
    } catch (Exception e) {
        logger.warn("decrypt token failure", e);
        return null;
    }

    byte[] sessionData = Hashing.sipHash24().hashObject(session, sessionFunnel).asBytes();
    String sessionString = new String(sessionData, StandardCharsets.UTF_8);
    if (!sessionString.equals(session.getSession())) {
        logger.warn("session not equal");
        return null;
    }

    return session;
}

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