Hiii ,
I need your help regarding pdf password
decryption. I have done the decryption of 128 bit RC4 and 128 bit AES
passowrd security but now I have to decrypt the 256 bit password security.
As according to the ISO 32000:1 document, Algorithm 3.2a Computing an
encryption key, I am not able to understand its first step:
1. The password string is generated from Unicode input by processing the
input string with the SASLprep
(IETF RFC 4013) profile of stringprep (IETF RFC 3454), and then converting
to a UTF-8 representation.
In this i am not able to understand anything about SASLprep profile of
stringprep. If anyone can please explain me something about it. I will be
really grateful to him/her.
Thanks
DevSam
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