Please help me in retrieving password from pdf

[senthil kumar]

Hi there

I got to see through jpdf code, it looks good for pdf manipulation tool. I want to find out the password for the password protected pdf, I got to see the following snippet of your code in de.intarsys.pdf.crypt.StandardSecurityHandler:

protected byte[] getU() {
COSString u = getEncryption().cosGetField(DK_U).asString();
try
{
for(byte b : u.byteValue())
{
System.out.println(b);
}
System.out.println("----------------"+new String(u.byteValue(),"UTF-16BE"));
//how to display password ?
}
catch(Exception e)
{
e.printStackTrace();;
}
if (u == null) {
return null;
}
return u.byteValue();
}

Please help me with your solution asap.

Regards
Sentil

[mtraut]

It would not make much sense if you could read out the password, does it?

[senthil kumar]

Hi

Our requirement is to get the password from the pdf document and render the passwordless.
I got the code snippet where I have explicitly set the password to user entered password in de.intarsys.pdf.crypt.StandardSecurityHandlerR3:

@Override
public boolean authenticateUser(byte[] user) throws COSSecurityException {

byte[] entryU = getU();
// byte[] tempU = createUserPassword(user);
// Commented by me
tempU = getU();
//Explicitly setting the user password to doc password
.....//rest of the code goes here

}
The attached password.pdf has the password as 'test'
But it get the blank document as attached without password, the file size is
len1 : : : 49755 //Before the document is decrypted
len2 : : : 49226 //After the document is decrypted
Please help me asap.

Regards
Sentil