nodejs常用暗号化方式

/**
 * @    
 * @md5        ,      
 * @author lwt
 * */
//    
var crypto = require('crypto');
/**
 * @aes192    
 * @param str string        
 * @param secret string         (   ,        )
 * @retrun string        
 * */
exports.getEncAse192 = function(str, secret) {
    var cipher = crypto.createCipher("aes192", secret); //                 
    var enc = cipher.update(str, "utf8", "hex");    //     utf-8  hex;
    enc += cipher.final("hex"); //       hex;
    return enc; //         
}
/**
 * @aes192    
 * @param str string        
 * @param secret string         (           ,        )
 * @retrun string        
 * */
exports.getDecAse192 = function(str, secret) {
    var decipher = crypto.createDecipher("aes192", secret);
    var dec = decipher.update(str, "hex", "utf8");//     hex  utf-8;
    dec += decipher.final("utf8");//     utf-8;
    return dec;
}
/**
 * @Hmac-sha1     (      ,   )
 * @param str string        
 * @param secret string         
 * @retrun string        
 * */
exports.getHmac = function(str, secret) {
    var buf = crypto.randomBytes(16);
    secret = buf.toString("hex");//    ；
    var Signture = crypto.createHmac("sha1", secret);//      
    Signture.update(str);
    var miwen=Signture.digest().toString("base64");//                pbkdf2      ；
    return miwen;
}
/**
 * @sha1     (    ,   )
 * @param str string        
 * @retrun string        
 * */
exports.getSha1 = function(str) {
    var sha1 = crypto.createHash("sha1");//      :md5   ,   md5      hash       ；
    sha1.update(str);
    var res = sha1.digest("hex");  //     d
    return res;
}