base64digest

        # OpenSSL::HMAC.base64digest

(from ruby core)
### Implementation from HMAC
---
    HMAC.base64digest(digest, key, data) -> aString

---

Returns the authentication code as a Base64-encoded string. The *digest*
parameter specifies the digest algorithm to use. This may be a String
representing the algorithm name or an instance of OpenSSL::Digest.

### Example
    key = 'key'
    data = 'The quick brown fox jumps over the lazy dog'

    hmac = OpenSSL::HMAC.base64digest('SHA1', key, data)
    #=> "3nybhbi3iqa8ino29wqQcBydtNk="


(from ruby core)
### Implementation from HMAC
---
    hmac.base64digest -> string

---

Returns the authentication code an a Base64-encoded string.