iaik.security.smime

Class DefaultCanonicalizer

java.lang.Object

iaik.security.smime.DefaultCanonicalizer

All Implemented Interfaces:

Canonicalizer

public class DefaultCanonicalizer
extends java.lang.Object
implements Canonicalizer

The default canonicalizer.

This class implements the Canonicalizer interface for ensuring that <CR> and <LF> always occurs together as <CR><LF> except when binary content transfer encoding is used. An application having or wishing to use a more specific canonicalization scheme may implement the Canonicalizer interface and register its new Canonicalizer by calling the static setCanonicalizer method of the SMimeParameters class. Note that for outging messages the Canonicalizer only is visited when modelling body parts and multiparts by classes SMimeBodyPart and SMimeMultipart classes or when supplying a text message by means of method setText for a multipart/signed SignedContent object. When parsing an ingoing message the canonicalizer only is utilized for the contents part of a multipart/signed message.

This class implements the canonicalizeOutputStream method by only returning a CanonicalizeOutputStream doing the canonicalization for non-binary entities and the canonicalizeInputStream method by returning a CanonicalizeInputStream:

 public OutputStream canonicalizeOutputStream(OutputStream os, String contentType, String contentTransferEncoding) { 
   if ((contentTransferEncoding == null) || (contentTransferEncoding.indexOf("binary") == -1)) {
      return new CanonicalizeOutputStream(os);
   } else { //do not canonicalize binary data
      return os;
   }
 }  
 
 public InputStream canonicalizeInputStream(LineInputStream is, String boundary) {
   return new CanonicalizeInputStream(is, boundary);    
 }  

 

See Also:

Canonicalizer

Method Summary

Modifier and Type	Method and Description
java.io.InputStream	canonicalizeInputStream(LineInputStream is, java.lang.String boundary) Wraps an canonicalizing input stream around the given input stream
java.io.OutputStream	canonicalizeOutputStream(java.io.OutputStream os, java.lang.String contentType, java.lang.String contentTransferEncoding) Wraps an canonicalizing output stream around the given output stream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

canonicalizeOutputStream

public java.io.OutputStream canonicalizeOutputStream(java.io.OutputStream os,
                                                     java.lang.String contentType,
                                                     java.lang.String contentTransferEncoding)

Wraps an canonicalizing output stream around the given output stream.

Specified by:

canonicalizeOutputStream in interface Canonicalizer

Parameters:

os - the (buffered) output stream where the MIME body part shall be written.

contentType - the MIME content type of the body part to be written

contentTransferEncoding - the content transfer encoding of the body part to be written.

Returns:

the CanonicalizeOutputStream

Throws:

java.io.IOException - if an error has to be thrown when setting the canonicalizing wrapping stream

canonicalizeInputStream

public java.io.InputStream canonicalizeInputStream(LineInputStream is,
                                                   java.lang.String boundary)

Wraps an canonicalizing input stream around the given input stream

Specified by:

canonicalizeInputStream in interface Canonicalizer

Parameters:

is - the input stream representing the MIME entity to be canonicalized

boundary - the boundary line indicating the end of the MIME entity

Returns:

the CanonicalizeInputStream

Throws:

java.io.IOException - if an error has to be thrown when setting the canonicalizing wrapping stream