Return sha1() hash from couchdb

I have some data stored in CouchDb of the form key-value. Basically it a tuple with a value and salt. I have created a view that return these tuples and calculate the sha1() of the value + salt on the client side using javascript. Is it possible to send the sha1() hash of value + salt directly from CouchDb as JSON? I do not wish to send the salt to the client. Thanks.