I am writing a UNIX program to verify a user's UNIX user name and password. UNIX includes a structure called passwd that allows programmers to verify fields in the passwd file. Comparing and verifying the user inputted/supplied name can be accomplished using this structure; however, the users inputted/supplied password can not, since it must be encrypted before it can be used. Is there a function that encrypts the user's inputted password? Th objective is to compare it against the field in the passwd file.