Load your content items in a text file, one item per line, and get them back SHA-1 hashed.
I needed and utility to compare huge lists of contents without disclosing their contents. Since those contents are organized on a line basis, but lines do not follow a specific ordered, I built SHA1-file, which takes text contents organized in lines and get back file with a sha1 hash for each line.
Prepare a single text file with just one content per line. Case is not relevant since SHA1-file will lovercase your data before computing sha1 hash.