Ruby in a Nutshell

Name

SHA1 — SHA1 message digest class

Synopsis

The SHA1 class provides a one-way hash function from arbitrary text data.

Class Methods

SHA1::new([str])

SHA1::sha1([str])

Creates a new SHA1 object. If a string argument is given, it’s added to the object.

Instance Methods

sh.clone

Copies the SHA1 object.

sh.digest

Returns the SHA1 hash of the added strings as a string of 16 bytes.

sh.hexdigest

Returns the SHA1 hash of the added strings as a string of 32 hexadecimal digits.

sh.update(str)

sh << str

Updates the SHA1 object with the string str. Repeated calls are equivalent to a single call with the concatenation of all the arguments, i.e., m.update(a); m.update(b) is equivalent to m.update(a+b), and m << a << b is equivalent to m << a+b.