Full modularized project

.gitignore

@@ -1,5 +1,5 @@
 /.clj-kondo/
-/.cpcache/
+/**/.cpcache/
 /.lsp/
 /target/
 .nrepl-port

README.md

@@ -17,6 +17,8 @@ You can read more about the algorithm here:
 
 ## How to use
 
+![Use example](use_example.gif)
+
 First, you must have installed a Java Runtime Environment. Check https://adoptium.net/es if you are
 unsure how to install.
 
@@ -145,11 +147,17 @@ clj-totp.sh import <alias> "<url>"
 - [x] Show several OTPs at once
 
 ### v1.2
+- [x] Show progress bar
+- [x] Styles for progress bar
+- [x] Native compilation script corrections
+
+### v2
+- [x] Restructurate as a multiproject
 - [ ] REST API
 - [ ] User management
 - [ ] Robust BD backend (H2, datomic, or similar)
 
-### v1.3
+### v3
 - [ ] Simple web connected to REST API
 
 
@@ -169,14 +177,14 @@ The first step is to install Java JDK, version 11 or newer (version 21 recommend
 
 To execute manually the main function, simple use the `:run` alias:
 
-```clojure
-clojure -M:run <commands and parameters>
+```bash
+clojure -M:run/cli <commands and parameters>
 ```
 
 To build the uberjar:
 
-```clojure
-clojure -T:build uber
+```bash
+clojure -T:build :uber/cli
 ```
 
 There is a utility script to build a native executable using Graal VM. Please, edit the script and

build.clj

@@ -1,37 +1,174 @@
 (ns build
-  (:require [clojure.tools.build.api :as b]))
+  (:refer-clojure :exclude [test])
+  (:require [clojure.tools.build.api :as b]
+            [clojure.java.io :as io]
+            [clojure.pprint :as pp]
+            [clojure.java.basis :as basis]))
 
-(def lib 'es.rcorral/clj-totp)
-(def version (format "1.1.%s" (b/git-count-revs nil)))
-(def target-dir "target")
-(def class-dir (str target-dir "/classes"))
-(def uber-file (format "target/%s-%s-standalone.jar" (name lib) version))
-
-;; delay to defer side effects (artifact downloads)
-(def basis (delay (b/create-basis {:project "deps.edn"})))
-
-(defn clean [_]
-  (b/delete {:path "target"}))
-
-(defn compile-java [_]
-  (b/javac {:src-dirs ["java"]
-            :class-dir class-dir
-            :basis @basis
-            :javac-opts ["-source" "11" "--target" "11" "-proc:none"]}))
+(def lib-group "es.rcorral")
+(def artifact-prefix "clj-totp")
+(def subprojs-base "projects")
+(def curr-version (format "2.0.%s" (b/git-count-revs nil)))
 
 
+;; Builds artifact's full descriptor for each subproject
+(defn lib [subproj]
+  (symbol (str lib-group "/" artifact-prefix "-" subproj )))
+
+
+;; Basis for each subproject, using their own deps.edn
+;; Injects :extra-deps from :build as additional dependencies
+(defn basis [subproj]
+  (delay (b/create-basis {:project (str subprojs-base "/" subproj "/deps.edn")
+                          ;; Inject extra deps as deps
+                          :extra {:deps (get-in (basis/initial-basis) [:aliases :build :extra-deps])}
+                          })))
+
+
+;; Show basis generated for a subproject
 #_{:clojure-lsp/ignore [:clojure-lsp/unused-public-var]}
-(defn uber [_]
-  (clean nil)
-  (b/copy-dir {:src-dirs ["src"]
+(defn show-basis [subproj]
+  (println (with-out-str
+             (pp/pprint
+              @(basis subproj)
+              ;(basis/initial-basis)
+              ))))
+
+(comment 
+  (pp/pprint (keys (basis/initial-basis)))
+  (pp/pprint (:deps (basis/initial-basis)))
+  (pp/pprint (:libs (basis/initial-basis)))
+  (pp/pprint (sort (keys (:aliases (basis/initial-basis)))))
+  (get-in (basis/initial-basis) [:aliases :build :extra-deps])
+  )
+
+;; Target dir for each subproject
+(defn target-dir [subproj]
+  (str "target/" subproj))
+
+
+;; Path for compiled classes
+(defn class-dir [subproj]
+  (str (target-dir subproj) "/" "classes"))
+
+
+;; Jar file for each subproject. :uber type adds -standalone suffix
+(defn jar-file [subproj version type]
+  (format "target/%s-%s-%s%s.jar" artifact-prefix subproj version
+          (if (= type :uber) "-standalone" "")))
+
+
+;; Clean target dir for subproject
+(defn clean [{:keys [subproj]}]
+  (b/delete {:path (target-dir subproj)})
+  (println "Project" subproj "cleaned"))
+
+
+;; Compile java classes, only if java subdir exists
+(defn compile-java [subproj]
+  (let [java-dir (str subprojs-base "/" subproj "/java")]
+    (when (.exists (io/file java-dir))
+      (println "Compiling java code for" subproj)
+      (b/javac {:src-dirs [java-dir]
+                :class-dir (class-dir subproj)
+                :basis @(basis subproj)
+                :javac-opts ["-source" "11" "--target" "11" "-proc:none"]}))))
+
+
+;; Create a jar file
+(defn jar
+  "Build a simple jar file, with no dependencies included."
+  [{:keys [subproj version]
+    :or {version curr-version}}]
+  (let [target-dir (target-dir subproj)
+        class-dir (class-dir subproj)
+        src-dir (str subprojs-base "/" subproj "/src")
+        resources-dir (str subprojs-base "/" subproj "/resources")
+        basis (basis subproj)
+        jar-file (jar-file subproj version :plain)]
+    ;; Clean only class dir
+    (b/delete {:path class-dir})
+    ;; Copy code
+    (b/copy-dir {:src-dirs [src-dir]
                  :target-dir class-dir})
-  (b/copy-file {:src "resources/clj-totp.sh"
-                :target "target/clj-totp.sh"})
-  (compile-java nil)
+    ;; Copy resources
+    (b/copy-dir {:src-dirs [resources-dir]
+                 :target-dir target-dir})
+    ;; Compile java code, if exists
+    (compile-java subproj)
+    ;; Build jar
+    (b/jar {:class-dir class-dir
+            :basis @basis
+            :jar-file jar-file
+            :lib (lib subproj)
+            :version version})
+    (println "Generated jar file:" jar-file)))
+
+
+;; Create an uber jar, with all dependencies inside
+#_{:clojure-lsp/ignore [:clojure-lsp/unused-public-var]}
+(defn uber
+  "Build a uberjar with all dependencies included"
+  [{:keys [subproj version main-ns]
+    :or {version curr-version}}]
+  (let [target-dir (target-dir subproj)
+        basis (basis subproj)
+        class-dir (class-dir subproj)
+        src-dir (str subprojs-base "/" subproj "/src")
+        resources-dir (str subprojs-base "/" subproj "/resources")
+        uber-file (jar-file subproj version :uber)]
+    ;(println "Using basis: ")(show-basis subproj)
+    (b/delete {:path class-dir})
+    (b/copy-dir {:src-dirs [src-dir]
+                 :target-dir class-dir})
+    (b/copy-dir {:src-dirs [resources-dir]
+                 :target-dir target-dir})
+    (compile-java subproj)
     (b/compile-clj {:basis @basis
-                  :ns-compile '[totp.app]
-                  :class-dir class-dir})
+                    :src-dirs [src-dir] :class-dir class-dir})
     (b/uber {:class-dir class-dir
              :uber-file uber-file
              :basis @basis
-           :main 'totp.app}))
+             :main main-ns})
+    (println "Generated uberjar executable:" uber-file)))
+
+
+;; Multimethod to get the name of all subdirs in a dir.
+;; Accepts strings or files
+(defmulti get-subdirs type)
+
+(defmethod get-subdirs
+  java.lang.String [dir]
+  (get-subdirs (io/file dir)))
+
+(defmethod get-subdirs
+  java.io.File [dir]
+  (if (.isDirectory dir)
+    (filter #(.isDirectory %) (.listFiles dir))
+    (println "Directory" subprojs-base "doesn't exists!")))
+
+
+;; Get the name of all subdir in a given directory
+(defn get-subdir-names
+  "Get a list projects in the 'projects' directory"
+  [dir-name]
+  (map #(.getName %) (get-subdirs dir-name)))
+
+(comment
+  (get-subdirs "projects")
+  (get-subdirs (io/file "projects"))
+  (get-subdir-names "projects")
+)
+
+
+;; Generate jar files for all projects
+(defn jar-all
+  "Build jar files for all projects"
+  [& {:keys [version]
+      :or {version curr-version}}]
+  (dorun (map #(jar {:subproj % :version version}) (get-subdir-names subprojs-base))))
+
+(comment 
+  (jar-all )
+
+)

deps.edn

@@ -1,22 +1,60 @@
 {:paths   ["src" "resources" "target/classes"]
  :deps    {org.clojure/clojure                 {:mvn/version "1.12.1"}
-           io.github.clojure/tools.build       {:mvn/version "0.10.10"}
-           mvxcvi/alphabase                    {:mvn/version "3.0.185"} ;; https://github.com/greglook/alphabase
-           cli-matic/cli-matic                 {:mvn/version "0.5.4"}   ;; https://github.com/l3nz/cli-matic
-           ;; Native image (GraalVM)
-           com.github.clj-easy/graal-build-time {:mvn/version "1.0.5"};; Tutorial: https://shagunagrawal.me/posts/setup-clojure-with-graalvm-for-native-image/
-           ;; Protobuf for java
-           com.google.protobuf/protobuf-java   {:mvn/version "3.25.8"}}
+           ;; Native image (GraalVM). Tutorial: https://shagunagrawal.me/posts/setup-clojure-with-graalvm-for-native-image/
+           com.github.clj-easy/graal-build-time {:mvn/version "1.0.5"}
+           ;; Local subprojects
+           clj-totp/core {:local/root "projects/core"}
+           clj-totp/cli  {:local/root "projects/cli"}
+           clj-totp/web  {:local/root "projects/web"}
+           }
 
- :aliases {;; Execute the app
+ :aliases {;; Execute the app.
            :run {:main-opts ["-m" "totp.app"]}
+           ;:run {:exec-fn totp.app/-main}
+
+           ;; Execute the app (prepared for more subprojects)
+           :run/cli {:main-opts ["-m" "totp.app"]}
+           ;:run {:exec-fn totp.app/-main}
 
            ;; Kaocha runner. You can use the 'kaocha' wrapper located in ~/bin/kaocha
-           :test     {:extra-paths ["test"]
-                      :extra-deps  {lambdaisland/kaocha {:mvn/version "1.91.1392"}}
+           ;; Check test.edn for kaocha runner's config
+           :test     {:extra-deps  {lambdaisland/kaocha {:mvn/version "1.91.1392"}
+                                    lambdaisland/kaocha-cloverage {:mvn/version "1.1.89"}}
                       :main-opts   ["-m" "kaocha.runner"]}
 
            ;; Run with clj -T:build function-in-build
            :build    {:deps {io.github.clojure/tools.build {:mvn/version "0.10.10"}}
-                      :ns-default build}}}
+                      ;; Used by all compilations
+                      :extra-deps {clj-totp/core {:local/root "projects/core"}}
+                      :ns-default build}
+
+           ;; Aliases for easy building
+           :build/core {:deps {io.github.clojure/tools.build {:mvn/version "0.10.10"}}
+                        :ns-default build
+                        :exec-fn jar
+                        :exec-args {:subproj "core"}}
+
+           :build/cli {:deps {io.github.clojure/tools.build {:mvn/version "0.10.10"}
+                              clj-totp/core {:local/root "projects/core"}}
+                       :ns-default build
+                       :exec-fn jar
+                       :exec-args {:subproj "cli"}}
+
+           :build/web {:deps {io.github.clojure/tools.build {:mvn/version "0.10.10"}}
+                       :replace-deps {clj-totp/core {:local/root "projects/core"}}
+                       :ns-default build
+                       :exec-fn jar
+                       :exec-args {:subproj "web"}}
+
+           ;; Build the three libraries
+           :build/all {:deps {io.github.clojure/tools.build {:mvn/version "0.10.10"}}
+                       :replace-deps {clj-totp/core {:local/root "projects/core"}}
+                       :ns-default build
+                       :exec-fn jar-all}
+
+           ;; Build uber jar for CLI app
+           :uber/cli {:deps {io.github.clojure/tools.build {:mvn/version "0.10.10"}}
+                      :ns-default build
+                      :exec-fn uber
+                      :exec-args {:subproj "cli" :main-ns "totp.app"}}}}
 

doc/db.plantuml

@@ -0,0 +1,34 @@
+@startuml
+' configuration
+skinparam linetype ortho
+
+entity "user" as user {
+        id: number
+        --
+        login: varchar(64)
+        passw: varchar(512)
+        active: shortint
+        desc: varchar(512)
+        config: varchar(512)
+}
+
+entity "app" as app {
+        id: number
+        --
+        name: varchar(32)
+        desc: varchar(512)
+        secret: varchar(512)
+        period: int
+        config: varchar(512)
+}
+
+entity "user_app" as user_app {
+        user_id: number
+        app_id: number
+        --
+}
+
+user ||--o{ user_app
+app ||--o{ user_app
+
+@enduml

native.cmd

@@ -0,0 +1,33 @@
+
+@echo off
+
+setlocal
+
+REM YOUR LOCAL GRAAL VM INSTALLATION
+set JAVA_HOME=D:\programas\graalvm-jdk-21.0.7+8.1
+REM generated file
+set BIN_FILE=totp
+
+set DEST_DIR=C:\Users\rubencj\util
+
+set PATH=%JAVA_HOME%\bin;%CLOJURE_HOME%;%PATH%
+set NATIVE=%JAVA_HOME%\bin\native-image.cmd
+
+
+echo Using GraalVM native compiler: %NATIVE%
+
+echo Creating uberjar
+clojure -T:build uber
+
+set UBERJAR=
+for /f "delims=" %%a in ('dir /b /s target\clj-totp-*-standalone.jar') do @set UBERJAR=%%a
+echo Created uberjar: %UBERJAR%
+
+echo "Creating native image"
+cmd /c %NATIVE% -jar %UBERJAR% -o target\%BIN_FILE% -H:+ReportExceptionStackTraces --features=clj_easy.graal_build_time.InitClojureClasses --report-unsupported-elements-at-runtime --verbose --no-fallback -H:ReflectionConfigurationFiles=reflect_config.json -H:-CheckToolchain --initialize-at-build-time=org.fusesource.jansi.Ansi
+
+
+echo Executable created: target\%BIN_FILE%.exe
+
+copy target\%BIN_FILE%.exe %DEST_DIR%
+echo Native image copied to %DEST_DIR%\%BIN_FILE%.exe

native.sh

@@ -8,8 +8,23 @@ clojure -T:build uber
 UBERJAR=$(realpath --relative-to=target target/clj-totp-*-standalone.jar)
 
 echo "Creating native image"
-$NATIVE -jar target/$UBERJAR -o target/$BIN_FILE -H:+ReportExceptionStackTraces --features=clj_easy.graal_build_time.InitClojureClasses --report-unsupported-elements-at-runtime --verbose --no-fallback -H:ReflectionConfigurationFiles=./reflect_config.json
+$NATIVE -jar target/$UBERJAR -o target/$BIN_FILE\
+    -H:+ReportExceptionStackTraces\
+    -H:ReflectionConfigurationFiles=./reflect_config.json\
+    --verbose --no-fallback\
+    --features=clj_easy.graal_build_time.InitClojureClasses\
+    --report-unsupported-elements-at-runtime\
+    --strict-image-heap\
+    -march=native\
+    -R:MaxHeapSize=10m\
+    --initialize-at-build-time=org.fusesource.jansi.Ansi\
+    --initialize-at-build-time='org.fusesource.jansi.Ansi$Color'\
+    --initialize-at-build-time='org.fusesource.jansi.Ansi$Attribute'\
+    '--initialize-at-build-time=org.fusesource.jansi.Ansi$1'
 
 echo "Executable created on target/$BIN_FILE"
 cp target/$BIN_FILE ~/bin
 echo "Copied to ~/bin/$BIN_FILE"
+
+echo "Compress executable for distribution"
+xz -fv target/$BIN_FILE

projects/cli/deps.edn

@@ -0,0 +1,15 @@
+{:paths   ["src" "resources" "target/classes"]
+ :deps    {;clj-totp/core                       {:local/root "../core"}
+           org.clojure/clojure                 {:mvn/version "1.12.1"}
+           cli-matic/cli-matic                 {:mvn/version "0.5.4"}   ;; https://github.com/l3nz/cli-matic
+           ;; Progress bar
+           com.github.pmonks/spinner           {:mvn/version "2.0.284"}}
+
+ :aliases {;; Execute the app
+           ;:run      {:main-opts   ["-m" "totp.app"]}
+
+           ;; Kaocha runner. You can use the 'kaocha' wrapper located in ~/bin/kaocha
+           :test     {:extra-paths ["test"]
+                      :extra-deps  {lambdaisland/kaocha {:mvn/version "1.91.1392"}}
+                      :main-opts   ["-m" "kaocha.runner"]}}}
+

projects/cli/src/totp/app.clj

@@ -4,33 +4,63 @@
             [totp.data :refer :all]
             [cli-matic.core :refer [run-cmd]]
             [clojure.pprint :as pp]
-            [clojure.string :as str])
+            [clojure.string :as str]
+            [progress.determinate :as pd])
   (:import [java.util TimerTask Timer])
   (:gen-class))
 
+(def DEFAULT_BAR_STYLE :coloured-ascii-boxes)
+
+(defn print-timer
+  ([] (print-timer 1 30 DEFAULT_BAR_STYLE))
+  ([bar-style] (print-timer 1 30 bar-style))
+  ([start period bar-style]
+   (let [a (atom start)]
+     (pd/animate! a :opts {:total period
+                                ;:line 1
+                           :label "Next TOTP: "
+                                ;:redraw-rate 60 ;; updates per second
+                           :style (get pd/styles bar-style)}
+                       ;(println)
+                  (run! (fn [_] (Thread/sleep 1000) (swap! a inc)) (range start (inc period)))
+                       ;(println)
+                  ))))
+
 
 (defn- print-confinuous
-  ([secret] (print-confinuous secret "sha1" 6 30))
-  ([secret algorithm digits period]
+  ([secret] (print-confinuous secret "sha1" 6 30 true DEFAULT_BAR_STYLE))
+  ([secret algorithm digits period bar bar-style]
    (let [step-millis (* 1000 period)
          now         (System/currentTimeMillis)
          delay       (int (- step-millis (rem now step-millis)))
-         fn-show     (fn [s] (println (format "[%d] %s" (System/currentTimeMillis) (get-otp s algorithm digits period))))
+         delay-sec   (int (/ delay 1000))
+         fn-show     (fn [s] (println (format "%n[%d] %s%n"
+                                              (System/currentTimeMillis)
+                                              (get-otp s algorithm digits period))))
          task        (proxy [TimerTask] []
-                       (run [] (fn-show secret)))]
+                       (run [] (println) (fn-show secret)))
+         task-bar    (proxy [TimerTask] []
+                       (run [] (print-timer bar-style)))
+         task-init   (proxy [TimerTask] []
+                       (run [] (print-timer (- period delay-sec) period bar-style)))]
      (println "\n  <Generating continuosly, press enter to stop>\n")
      ;; (println "Now:" now ", Delay:" delay ", Next execution: " (+ now delay))
-     (println "Refresing in" (int (/ delay 1000)) "seconds")
+     (println "Refresing in" delay-sec "seconds")
      (fn-show secret)
+     ;; Now, start the tasks
+     (when bar
+       (. (new Timer) (schedule task-init 0))
+       (. (new Timer) (scheduleAtFixedRate task-bar delay step-millis)))
      (. (new Timer) (scheduleAtFixedRate task delay step-millis)))
-   (read-line))) ;; Waits for a key press
+   ;; Waits for a key press
+   (read-line)))
 
 
 (defn cmd-generate
-  [& {:keys [secret continuous algorithm digits period]}]
+  [& {:keys [secret continuous algorithm digits period bar bar-style]}]
   ;;(pp/pprint opts)
   (if continuous
-    (print-confinuous secret algorithm digits period)
+    (print-confinuous secret algorithm digits period bar bar-style)
     (println (get-otp secret algorithm digits period))))
 
 
@@ -49,28 +79,45 @@
    (let [step-millis (* 1000 period)
          now         (System/currentTimeMillis)
          delay       (int (- step-millis (rem now step-millis)))
+         delay-sec   (int (/ delay 1000))
          fn-show     (fn [s]
+                       (println "\n")
                        (dorun (map print-app s))
-                       (println "")) ;; Separate each
+                       (println) ;; Separate each
+                       )
          task        (proxy [TimerTask] []
                        (run [] (fn-show apps)))]
      (println "\n  <Generating continuosly, press enter to stop>\n")
      ;; (println "Now:" now ", Delay:" delay ", Next execution: " (+ now delay))
-     (println "Refresing in" (int (/ delay 1000)) "seconds")
+     (println "Refresing in" delay-sec "seconds")
      (fn-show apps)
+     ;; Now, start the tasks
      (. (new Timer) (scheduleAtFixedRate task delay step-millis)))
-   (read-line))) ;; Waits for a key press
+   )) ;; Waits for a key press
 
 
 (defn cmd-get-multi
-  [& {:keys [continuous _arguments]}]
+  [& {:keys [continuous bar bar-style _arguments]}]
   ;(pp/pprint opts)
   (with-config
     (let [apps (filter some? #_{:clj-kondo/ignore [:unresolved-symbol]}
                              (map #(get-app cfg %) _arguments))]
       ;(println "found apps: " apps)
       (if continuous
-        (print-app-continuous 30 apps)
+        (let [period      30
+              step-millis (* 1000 period)
+              now         (System/currentTimeMillis)
+              delay       (int (- step-millis (rem now step-millis)))
+              delay-sec   (int (/ delay 1000))
+              task-bar    (proxy [TimerTask] []
+                            (run [] (print-timer bar-style)))
+              task-init   (proxy [TimerTask] []
+                            (run [] (print-timer (- period delay-sec) period bar-style)))]
+          (print-app-continuous period apps)
+          (when bar
+            (. (new Timer) (schedule task-init 0))
+            (. (new Timer) (scheduleAtFixedRate task-bar delay step-millis)))
+          (read-line))
         (dorun (map #(print-app %) apps))))))
 
 
@@ -153,7 +200,7 @@
 
 (def cli-options
   {:app {:command "totp"
-         :version "1.1"
+         :version "1.2"
          :description ["Generate a TOTP"]}
 
    :commands [;; Generate a TOTP with given params
@@ -182,7 +229,15 @@
                       {:option "period" :short "p"
                        :as "Validity time in seconds"
                        :type :int
-                       :default 30}]
+                       :default 30}
+                      {:option "bar" :short "b"
+                       :as "Show progress bar"
+                       :type :with-flag
+                       :default true}
+                      {:option "bar-style" :short "s"
+                       :as "Progress bar style"
+                       :type #{:ascii-basic :ascii-boxes :coloured-ascii-boxes :emoji-circles :emoji-boxes}
+                       :default :coloured-ascii-boxes}]
                :runs cmd-generate}
               ;; Generate a TOTP for a configured app
               {:command "get" :short "g"
@@ -198,7 +253,15 @@
                       {:option "continuous" :short "c"
                        :as "Contiuous mode"
                        :type :with-flag
-                       :default false}]
+                       :default false}
+                      {:option "bar" :short "b"
+                       :as "Show progress bar"
+                       :type :with-flag
+                       :default true}
+                      {:option "bar-style" :short "s"
+                       :as "Progress bar style"
+                       :type #{:ascii-basic :ascii-boxes :coloured-ascii-boxes :emoji-circles :emoji-boxes}
+                       :default :coloured-ascii-boxes}]
                :runs cmd-get-multi}
               ;; Check and init your config file
               {:command "config" :short "c"

projects/cli/tests.edn

@@ -0,0 +1 @@
+#kaocha/v1 {}

projects/core/.cpcache/425892293.main

@@ -0,0 +1,2 @@
+-m
+kaocha.runner

projects/core/deps.edn

@@ -0,0 +1,12 @@
+{:paths   ["src" "resources" "target/classes"]
+ :deps    {org.clojure/clojure                 {:mvn/version "1.12.1"}
+           mvxcvi/alphabase                    {:mvn/version "3.0.185"} ;; https://github.com/greglook/alphabase
+           ;; Protobuf for java
+           com.google.protobuf/protobuf-java   {:mvn/version "3.25.8"}
+           }
+
+ :aliases {;; Kaocha runner. You can use the 'kaocha' wrapper located in ~/bin/kaocha
+           :test     {:extra-paths ["test"]
+                      :extra-deps  {lambdaisland/kaocha {:mvn/version "1.91.1392"}}
+                      :main-opts   ["-m" "kaocha.runner"]}}}
+

projects/core/target/classes/totp/core.clj

@@ -0,0 +1,101 @@
+(ns totp.core
+  (:require [alphabase.base32 :as b32]
+            [clojure.math :as m])
+  (:import (javax.crypto Mac)
+           (javax.crypto.spec SecretKeySpec)
+           (java.util Base64 Arrays)
+           (java.nio ByteBuffer)))
+
+(def ^:private byte-array-type (type (.getBytes "")))
+
+(defn timestamp->steps
+  "Converts from UNIX timestamp in milliseconds to a number os steps of 's' seconds of duration"
+  [time, step-size]
+  (if (or (nil? time) (nil? step-size) (zero? step-size))
+    0
+    (int (quot time (* 1000 step-size)))))
+
+
+(defn bytes-array?
+  "Return true if x is a byte[]"
+  [x]
+  (= byte-array-type (type x)))
+
+
+(defn get-alg
+  [alg]
+  (case alg
+    "sha1"  "HmacSHA1"
+    "sha256" "HmacSHA256"
+    "sha512" "HmacSHA512"
+    ""))
+
+
+(defmulti hmac
+  "Generates an HMAC. Algorithms supported: sha1, sha256, sha512.
+   The key and the message can be (both) string or array of bytes, nil otherwise"
+  (fn [algorithm key message]
+    (cond
+      (and (string? key) (string? message) (some? (get-alg algorithm))) :string
+      (and (bytes-array? key) (bytes-array? message) (some? (get-alg algorithm))) :byte
+      :else :nil)))
+
+;; By default
+(defmethod hmac :nil [_ _ _]
+  nil)
+
+;; When key and message are strings
+(defmethod hmac :string [algorithm key message]
+  (if (or (empty? key) (empty? message))
+    ""
+    (let [mac (doto (Mac/getInstance (get-alg algorithm)) (.init (SecretKeySpec. (.getBytes key) (get-alg algorithm))))
+          hmac-bytes (.doFinal mac (.getBytes message))]
+      ;; Return the Base64 encoded HMAC
+      (.encodeToString (Base64/getEncoder) hmac-bytes))))
+
+;; When key and message are arrays of bytes
+(defmethod hmac :byte [algorithm key message]
+  (if (nil? message)
+    (bytes (byte-array 0))
+    (let [mac (doto (Mac/getInstance (get-alg algorithm)) (.init (SecretKeySpec. key (get-alg algorithm))))
+          hmac-bytes (.doFinal mac message)]
+      ;; Return the Base64 encoded HMAC
+      (Base64/getEncoder) hmac-bytes)))
+
+
+(defn long->bytes
+  "Converts a long to an array of 8 bytes"
+  [l]
+  ;;Java equivalent: ByteBuffer.allocate(Long.SIZE / Byte.SIZE).putLong(someLong).array();
+  (when (integer? l)
+    (-> (ByteBuffer/allocate (/ Long/SIZE Byte/SIZE))
+        (.putLong l)
+        (.array))))
+
+
+(defn bytes->int
+  "Converts an array of 4 bytes to an integer"
+  [bytes]
+  ;;Java equivalent:  ByteBuffer.wrap(data).getInt()
+  (when (some? bytes)
+    (.getInt (ByteBuffer/wrap bytes))))
+
+
+(defn get-otp
+  "Generate an OTP with the given secret (in base32) for the specified timestep"
+  ([secret algorithm digits period] ;;algorithm digits period
+   (when (and secret period)
+     (let [step (timestamp->steps (System/currentTimeMillis) period)
+           k (b32/decode secret)
+           c (long->bytes step)
+           hs (hmac algorithm k c)
+           offset (bit-and (get hs (dec (count hs))) 0x0f) ;; int offset = hs[hs.length-1] & 0xf;
+           chunk (Arrays/copyOfRange hs offset (+ offset 4)) ;(take 4 (drop offset hs)) ;; byte[] chunk = Arrays.copyOfRange(hs, offset, offset+4) 
+           ]
+       (format (str "%0" digits "d")
+               (-> chunk
+                   (bytes->int)
+                   (bit-and 0x7fffffff)
+                   (rem (int (m/pow 10 digits))))))))
+  ([secret]
+   (get-otp secret "sha1" 6 30)))