sha1

sha1 is a compiled Lisp function in `subr.el'.

(sha1 OBJECT &optional START END BINARY)

Return the SHA1 (Secure Hash Algorithm) of an OBJECT.
OBJECT is either a string or a buffer. Optional arguments START and
END are character positions specifying which portion of OBJECT for
computing the hash. If BINARY is non-nil, return a string in binary
form.