I may b late but incase anybody else is searching for a result I found one... unrar works wen u pay for it maybe but not the free version, and archidroid does nothing. The one I found to work most efficiently was Archiver hope it helps
Search for ArchiDroid in the market and it will do your job... It extracts password-protected RAR, ZIP, TAR, GZIP, BZIP2 and 7zip files... amazingly it is free... Unrar didn't work for me but this one works like a charm
There are so many Password Recovery Software are available which you can try your self.
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