litesoft
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package org.litesoft.encryption.symmetric;
public abstract class AbstractSymmetricEncryptor implements SymmetricEncryptor
{
public String encrypt( String pClearText )
{
if ( pClearText == null )
{
return null;
}
Helper zHelper = createHelper( pClearText );
for ( int zChar; -1 != (zChar = zHelper.read()); )
{
zHelper.encode( zChar );
}
return zHelper.done();
}
public String decrypt( String pEncryptedText )
throws DecryptFailureException
{
if ( pEncryptedText == null )
{
return null;
}
Helper zHelper = createHelper( pEncryptedText );
for ( int zChar; -1 != (zChar = zHelper.read()); )
{
zHelper.decode( zChar );
}
return zHelper.done();
}
abstract protected Helper createHelper( String pText );
protected abstract static class Helper
{
private int mTextIndex = 0;
private String mText;
protected StringBuilder mSB = new StringBuilder();
public Helper( String pText )
{
mText = pText;
}
public int read()
{
return (mTextIndex < mText.length()) ? mText.charAt( mTextIndex++ ) : -1;
}
public String toString()
{
return mSB.toString();
}
abstract public String done();
abstract public void encode( int pChar );
abstract public void decode( int pChar );
}
}
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Revision |
Author |
Commited |
Message |
2
|
GeorgeS
|
Sun 07 Feb, 2010 12:50:58 +0000 |
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