Re: embed digital signature in XML

[Pae Choi]

Title: RE: create/serialize sub-documents

Try obtain a grasp of EBNF and read the UML spec. You probably can gain a lot more understanding by doing that than spend a chunk of time posting on the net just get a piece of info.   Pae   -----Original Message----- From: Lei Chen <[EMAIL PROTECTED]> To: '[EMAIL PROTECTED]' <[EMAIL PROTECTED]> Date: Monday, April 02, 2001 4:58 PM Subject: RE: embed digital signature in XML One example of the encoded signature is like following:   MCwCFASCEpl54HrKa+8EW55HX6m/GJGVAhQCTk2wyDl8ftru+9Zgl70ZVN/CsQ==   -----Original Message----- From: Lei Chen Sent: Monday, April 02, 2001 12:40 PM To: '[EMAIL PROTECTED]' Subject: RE: embed digital signature in XML I tried both encode(byte[]) and encodeBuffer(byte[]) of sun.misc.BASE64Encode, but I am still getting the same exception. Here is the code:                     byte[] data = "">                  byte[] sig = signature.sign(data);                    ...                    Element root = doc.createElement("top");                    doc.appendChild(root);                    ...                   sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();                   String encodedSig = encoder.encodeBuffer(sig);                    root.appendChild ( doc.createProcessingInstruction("DigSign" + encodedSig, null) ); What kind of character is allowed in processing instructions?   -Lei   -----Original Message----- From: Mark Sizer [mailto:[EMAIL PROTECTED] Sent: Monday, April 02, 2001 12:18 PM To: '[EMAIL PROTECTED]' Subject: RE: embed digital signature in XML I base64 encode my digital signatures before stuffing them into XML - it works fine.   I'm using an open-source package from Germany, but I believe there is a base64 encoder/decoder buried in the Xerces packages somewhere. If not, Sun has one, too. -----Original Message----- From: Lei Chen [mailto:[EMAIL PROTECTED] Sent: Monday, April 02, 2001 9:42 AM To: '[EMAIL PROTECTED]' Subject: embed digital signature in XML Hi folks, I am trying to embed a digital signature into a XML document as processing instructions like following:                   <top>                       <contract>                             ...                       </contract>                       <?DigSignA234B5678E897?>                    </top> The signature was generated by using 'byte[] Signature.sign(bye[])' from java.security package. However, when I ran following code:                   ...                   byte[] data = "">                  byte[] sig = signature.sign(data);                    ...                    Element root = doc.createElement("top");                    doc.appendChild(root);                    ...                    root.appendChild ( doc.createProcessingInstruction("DigSign" + new String(sig), null) ); I got java.lang.InstantiationError: org/w3c/dom/DOMException  at org.apache.xerces.dom.DocumentImpl.createProcessingInstruction(DocumentImpl.java:566) If I switch to sun's crimson parser, the error message is more informative: org.apache.crimson.tree.DomEx: INVALID_CHARACTER_ERR: An invalid character was specified, such as in a name.  at org.apache.crimson.tree.XmlDocument.createProcessingInstruction(XmlDocument.java:984) I guess some kind of encoding has to be done to the signature byte array before I construct the String and pass it to this method. But I don't know how to do it. Can somebody point it out? thanx in advance -Lei