clj-digest / src / digest.clj

(ns digest
  #^{ :author "Miki Tebeka <miki.tebeka@gmail.com>"
      :doc "Message digest algorithms for Clojure"}
  (:use [clojure.string :only (split lower-case)])
  (:import (java.security MessageDigest Security)))

; Code "borrowed" from http://www.holygoat.co.uk/blog/entry/2009-03-26-1

(defmulti digest (fn [_ m] (class m)))

(defmethod digest String [algorithm message]
  (digest algorithm [message]))

(defmethod digest :default
  [algorithm messages]
  (let [algo (MessageDigest/getInstance algorithm)]
    (.reset algo)
    (dorun (map #(.update algo (.getBytes %)) messages))
    (.toString (BigInteger. 1 (.digest algo)) 16)))

(defn algorithms []
  "List support digest algorithms"
  (let [providers (into [] (Security/getProviders))
        names (mapcat #(enumeration-seq (.keys %)) providers)
        digest-names (filter #(re-find #"MessageDigest\.[A-Z0-9-]+$" %) names)]
    (set (map #(last (split % #"\.")) digest-names))))


(defn create-fns []
  "Create utility function for each digest algorithms"
  (dorun (map #(intern 'digest (symbol (lower-case %)) (partial digest %))
              (algorithms))))
(create-fns)
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.