as3cryptoを使ってみた

ようやくas3cryptoを試してみた。

ドキュメント少ないなぁ・・・と思っていたけれど、始めてみたらDemoでソースコードを読めるので難しいことはなかった。

StudyCrypto.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
showStatusBar="false"
width="320" height="300"
styleName="study"
borderThickness="1">
<mx:Style>
   .study {
       paddingBottom: 3;
       paddingLeft: 3;
       paddingRight: 3;
       paddingTop: 3;
   }
</mx:Style>
<mx:Script>
   <![CDATA[
       import com.hurlant.crypto.Crypto;
       import com.hurlant.crypto.symmetric.ICipher;
       import com.hurlant.crypto.symmetric.IPad;
       import com.hurlant.crypto.symmetric.IVMode;
       import com.hurlant.crypto.symmetric.PKCS5;
       import com.hurlant.util.Base64;
       import com.hurlant.util.Hex;

       public static function encrypt(name:String, k:String, s:String):ByteArray {
           var e:ByteArray = new ByteArray();
           var key:ByteArray = Hex.toArray(Hex.fromString(k));
           var data:ByteArray = Hex.toArray(Hex.fromString(s));
           var pad:IPad = new PKCS5();
           var cipher:ICipher = Crypto.getCipher(name, key, pad);
           pad.setBlockSize(cipher.getBlockSize());
           cipher.encrypt(data);
           e.writeObject(data);
           if(cipher is IVMode){
               var ivmode:IVMode = cipher as IVMode;
               e.writeObject(ivmode.IV);
           }
           e.position = 0;
           return e;
       }
  
       public static function decrypt(name:String, k:String, e:ByteArray):String {
           var data:ByteArray = e.readObject();
           var kdata:ByteArray = Hex.toArray(Hex.fromString(k));
           var pad:IPad = new PKCS5();
           var cipher:ICipher = Crypto.getCipher(name, kdata, pad);
           if(cipher is IVMode){
               var ivmode:IVMode = cipher as IVMode;
               ivmode.IV = e.readObject();
           }
           cipher.decrypt(data);
           return Hex.toString(Hex.fromArray(data));
       }
  
       private function run():void {
           const name:String = 'aes-cbc';
           var e:ByteArray = encrypt(name, key.text, src.text);
           o0.text = Base64.encode(Hex.fromArray(e));
           o1.text = decrypt(name, key.text, Hex.toArray(Base64.decode(o0.text)));
       }
   ]]>
</mx:Script>
<mx:Form styleName="study" width="100%" cornerRadius="6" borderColor="#218BD5" borderStyle="solid">
   <mx:FormItem label="Password" width="100%">
       <mx:TextInput width="100%" id="key" change="btn.enabled = (4 &lt;= key.text.length)"/>
   </mx:FormItem>
   <mx:FormItem label="Input" width="100%">
       <mx:TextInput width="100%" id="src"/>
   </mx:FormItem>
   <mx:FormItem width="100%">
       <mx:Button id="btn" label="run" click="run()" enabled="false"/>
   </mx:FormItem>
</mx:Form>
<mx:Form styleName="study" width="100%" height="100%" cornerRadius="6" borderColor="#218BD5" borderStyle="solid">
   <mx:FormItem label="Encrypt" width="100%" height="100%">
       <mx:TextArea width="100%" height="100%" id="o0"/>
   </mx:FormItem>
   <mx:FormItem label="Decrypt" width="100%" height="100%">
       <mx:TextArea width="100%" height="100%" id="o1"/>
   </mx:FormItem>
</mx:Form>
</mx:WindowedApplication>