litesoft
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package org.litesoft.encryption.symmetric;
public interface SymmetricEncryptorManager
{
/**
* Adds a decryptor to the supported list
*/
public abstract void addDecryptor( SymmetricEncryptor pSymmetricEncryptor );
/**
* Set the "current" Encryptor
*/
public abstract void setSymmetricEncryptor( SymmetricEncryptor pSymmetricEncryptor );
/**
* @return The "current" Encryptor (the initial SE is BrainDeadSymmetricEncryptor)
*/
public abstract SymmetricEncryptor getSymmetricEncryptor();
/**
* @return null if not found!
*/
public abstract SymmetricEncryptor getSymmetricEncryptor( String pIdentifierAndVersion );
public static class Helper
{
public static String fromEncrypted( SymmetricEncryptorManager pSymmetricEncryptorManager,
String pEncryptedText )
{
if ( pEncryptedText == null )
{
return null;
}
SymmetricEncryptor zSE = pSymmetricEncryptorManager.getSymmetricEncryptor();
String zIDnVerPrefix = zSE.getIdentifierAndVersion() + ":";
if ( !pEncryptedText.startsWith( zIDnVerPrefix ) )
{
int zVerSepAt = pEncryptedText.indexOf( ':' );
if ( zVerSepAt == -1 )
{
throw new IllegalStateException( "Encrypted Field w/o Identifier And Version" );
}
String zIdAndVer = pEncryptedText.substring( 0, zVerSepAt );
zSE = pSymmetricEncryptorManager.getSymmetricEncryptor( zIdAndVer );
if ( zSE == null )
{
throw new IllegalStateException(
"Encrypted Field with an unsupported Identifier And Version (" + zIdAndVer +
")" );
}
}
return zSE.decrypt( pEncryptedText.substring( zIDnVerPrefix.length() ) );
}
public static String toEncrypted( SymmetricEncryptorManager pSymmetricEncryptorManager,
String pPlainText )
{
if ( pPlainText == null )
{
return null;
}
SymmetricEncryptor zSE = pSymmetricEncryptorManager.getSymmetricEncryptor();
return zSE.getIdentifierAndVersion() + ":" + zSE.encrypt( pPlainText );
}
}
}
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Revision |
Author |
Commited |
Message |
2
|
GeorgeS
|
Sun 07 Feb, 2010 12:50:58 +0000 |
|