Delphi TrueCrypt decryption application requires finishing.

We have a partially completed Delphi project that requires one last step to finish it off. The project is for decrypting sectors from a TrueCrypt volume. This is NOT a password cracking a program. The password is known to the user at the time of running the program. We only require a routine to decrypt any sector based on the information obtained out of the TrueCrypt volume header. Knowledge of Cryptographic techniques is essential, as well as strong Delphi skills. TrueCrypt is open source and written in C/C++. Therefore knowledge of C/C++ is required in order to understand how to perform the sector decryption. You will be supplied with the full test application written in Delphi that requires completion. No GUI skills are required, as you will only be completing the test application. Please no time wasters. If you do not know anything about Cryptography - DO NOT BID. If you do not know how to program in Delphi - DO NOT BID.