commit 97257044a443ea1e4faa3ce2c14e688ce9bdc728
Author: ehlxr <ehlxr.me@gmail.com>
Date:   Tue Mar 27 15:37:33 2018 +0800

    站点更新：2018-03-27 15:37:33

diff --git a/.idea/emacs.xml b/.idea/emacs.xml
new file mode 100644
index 0000000..a1e816f
--- /dev/null
+++ b/.idea/emacs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="EmacsSettings">
+    <option name="emacsPath" value="/usr/bin/emacs" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/jwt.iml b/.idea/jwt.iml
new file mode 100644
index 0000000..5e764c4
--- /dev/null
+++ b/.idea/jwt.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..0f9aaf6
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/jwt.iml" filepath="$PROJECT_DIR$/.idea/jwt.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/watcherTasks.xml b/.idea/watcherTasks.xml
new file mode 100644
index 0000000..df66477
--- /dev/null
+++ b/.idea/watcherTasks.xml
@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectTasksOptions">
+    <TaskOptions isEnabled="true">
+      <option name="arguments" value="fmt $FilePath$" />
+      <option name="checkSyntaxErrors" value="true" />
+      <option name="description" />
+      <option name="exitCodeBehavior" value="ERROR" />
+      <option name="fileExtension" value="go" />
+      <option name="immediateSync" value="false" />
+      <option name="name" value="go fmt" />
+      <option name="output" value="$FilePath$" />
+      <option name="outputFilters">
+        <array />
+      </option>
+      <option name="outputFromStdout" value="false" />
+      <option name="program" value="$GoExecPath$" />
+      <option name="runOnExternalChanges" value="false" />
+      <option name="scopeName" value="Project Files" />
+      <option name="trackOnlyRoot" value="true" />
+      <option name="workingDir" value="" />
+      <envs>
+        <env name="GOROOT" value="$GOROOT$" />
+        <env name="GOPATH" value="$GOPATH$" />
+        <env name="PATH" value="$GoBinDirs$" />
+      </envs>
+    </TaskOptions>
+    <TaskOptions isEnabled="true">
+      <option name="arguments" value="-w $FilePath$" />
+      <option name="checkSyntaxErrors" value="true" />
+      <option name="description" />
+      <option name="exitCodeBehavior" value="ERROR" />
+      <option name="fileExtension" value="go" />
+      <option name="immediateSync" value="false" />
+      <option name="name" value="goimports" />
+      <option name="output" value="$FilePath$" />
+      <option name="outputFilters">
+        <array />
+      </option>
+      <option name="outputFromStdout" value="false" />
+      <option name="program" value="goimports" />
+      <option name="runOnExternalChanges" value="false" />
+      <option name="scopeName" value="Project Files" />
+      <option name="trackOnlyRoot" value="true" />
+      <option name="workingDir" value="" />
+      <envs>
+        <env name="GOROOT" value="$GOROOT$" />
+        <env name="GOPATH" value="$GOPATH$" />
+        <env name="PATH" value="$GoBinDirs$" />
+      </envs>
+    </TaskOptions>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
new file mode 100644
index 0000000..b249e87
--- /dev/null
+++ b/.idea/workspace.xml
@@ -0,0 +1,302 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ChangeListManager">
+    <list default="true" id="847c5949-378a-4c01-9318-d1db88c22ef9" name="Default" comment="" />
+    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
+    <option name="TRACKING_ENABLED" value="true" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="FileEditorManager">
+    <leaf>
+      <file leaf-file-name="showtoken.go" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/token/showtoken.go">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="527">
+              <caret line="39" column="24" lean-forward="true" selection-start-line="39" selection-start-column="24" selection-end-line="39" selection-end-column="24" />
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="token.go" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/token/token.go">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="251">
+              <caret line="38" column="5" lean-forward="false" selection-start-line="38" selection-start-column="5" selection-end-line="38" selection-end-column="5" />
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
+    </leaf>
+  </component>
+  <component name="GOROOT" path="/usr/local/opt/go/libexec" />
+  <component name="IdeDocumentHistory">
+    <option name="CHANGED_PATHS">
+      <list>
+        <option value="$PROJECT_DIR$/cmd/verify.go" />
+        <option value="$PROJECT_DIR$/cmd/show.go" />
+        <option value="$PROJECT_DIR$/token/signtoken.go" />
+        <option value="$PROJECT_DIR$/cmd/sign.go" />
+        <option value="$PROJECT_DIR$/token/token.go" />
+      </list>
+    </option>
+  </component>
+  <component name="JsBuildToolGruntFileManager" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsBuildToolPackageJson" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsGulpfileManager">
+    <detection-done>true</detection-done>
+    <sorting>DEFINITION_ORDER</sorting>
+  </component>
+  <component name="ProjectFrameBounds" extendedState="6">
+    <option name="x" value="1920" />
+    <option name="y" value="23" />
+    <option name="width" value="1440" />
+    <option name="height" value="877" />
+  </component>
+  <component name="ProjectView">
+    <navigator currentView="ProjectPane" proportions="" version="1">
+      <flattenPackages />
+      <showMembers />
+      <showModules />
+      <showLibraryContents />
+      <hideEmptyPackages />
+      <abbreviatePackageNames />
+      <autoscrollToSource />
+      <autoscrollFromSource />
+      <sortByType />
+      <manualOrder />
+      <foldersAlwaysOnTop value="true" />
+    </navigator>
+    <panes>
+      <pane id="Scratches" />
+      <pane id="ProjectPane">
+        <subPane>
+          <expand>
+            <path>
+              <item name="jwt" type="b2602c69:ProjectViewProjectNode" />
+              <item name="jwt" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="jwt" type="b2602c69:ProjectViewProjectNode" />
+              <item name="jwt" type="462c0819:PsiDirectoryNode" />
+              <item name="cmd" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="jwt" type="b2602c69:ProjectViewProjectNode" />
+              <item name="jwt" type="462c0819:PsiDirectoryNode" />
+              <item name="token" type="462c0819:PsiDirectoryNode" />
+            </path>
+          </expand>
+          <select />
+        </subPane>
+      </pane>
+      <pane id="Scope" />
+    </panes>
+  </component>
+  <component name="PropertiesComponent">
+    <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
+    <property name="go.sdk.automatically.set" value="true" />
+    <property name="settings.editor.selected.configurable" value="watcher.settings" />
+  </component>
+  <component name="RunDashboard">
+    <option name="ruleStates">
+      <list>
+        <RuleState>
+          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
+        </RuleState>
+        <RuleState>
+          <option name="name" value="StatusDashboardGroupingRule" />
+        </RuleState>
+      </list>
+    </option>
+  </component>
+  <component name="RunManager">
+    <configuration name="go build main.go" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true">
+      <module name="jwt" />
+      <working_directory value="$PROJECT_DIR$/" />
+      <go_parameters value="-i" />
+      <parameters value="show -t -" />
+      <kind value="FILE" />
+      <filePath value="$PROJECT_DIR$/main.go" />
+      <package value="github.com/ehlxr/jwt" />
+      <directory value="$PROJECT_DIR$/" />
+    </configuration>
+    <recent_temporary>
+      <list size="1">
+        <item index="0" class="java.lang.String" itemvalue="Go Build.go build main.go" />
+      </list>
+    </recent_temporary>
+  </component>
+  <component name="ShelveChangesManager" show_recycled="false">
+    <option name="remove_strategy" value="false" />
+  </component>
+  <component name="ToolWindowManager">
+    <frame x="1920" y="23" width="1440" height="877" extended-state="6" />
+    <editor active="true" />
+    <layout>
+      <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
+      <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="true" content_ui="tabs" />
+      <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="false" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
+      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32992327" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
+      <window_info id="Terminal" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
+      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.17381974" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
+      <window_info id="Hierarchy" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.24964234" sideWeight="0.5" order="2" side_tool="false" content_ui="combo" />
+      <window_info id="Docker" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="false" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
+      <window_info id="Database" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="false" content_ui="tabs" />
+      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32992327" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
+      <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
+      <window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="-1" side_tool="true" content_ui="tabs" />
+      <window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.39897698" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
+      <window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
+      <window_info id="Message" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
+      <window_info id="Commander" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
+      <window_info id="Inspection" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="5" side_tool="false" content_ui="tabs" />
+      <window_info id="Ant Build" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
+    </layout>
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="1" />
+  </component>
+  <component name="VcsContentAnnotationSettings">
+    <option name="myLimit" value="2678400000" />
+  </component>
+  <component name="XDebuggerManager">
+    <breakpoint-manager>
+      <breakpoints>
+        <line-breakpoint enabled="true" type="DlvLineBreakpoint">
+          <url>file://$PROJECT_DIR$/token/token.go</url>
+          <line>45</line>
+          <properties />
+          <option name="timeStamp" value="4" />
+        </line-breakpoint>
+        <line-breakpoint enabled="true" type="DlvLineBreakpoint">
+          <url>file://$PROJECT_DIR$/token/token.go</url>
+          <line>39</line>
+          <properties />
+          <option name="timeStamp" value="7" />
+        </line-breakpoint>
+      </breakpoints>
+      <option name="time" value="8" />
+    </breakpoint-manager>
+    <watches-manager />
+  </component>
+  <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/main.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="247">
+          <caret line="13" column="20" lean-forward="false" selection-start-line="13" selection-start-column="20" selection-end-line="13" selection-end-column="20" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/cmd/root.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="317">
+          <caret line="47" column="18" lean-forward="true" selection-start-line="46" selection-start-column="8" selection-end-line="47" selection-end-column="18" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/cmd/show.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="129">
+          <caret line="39" column="22" lean-forward="true" selection-start-line="39" selection-start-column="22" selection-end-line="39" selection-end-column="22" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/util/tokenutil.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="185">
+          <caret line="34" column="5" lean-forward="false" selection-start-line="34" selection-start-column="5" selection-end-line="34" selection-end-column="5" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/../../spf13/pflag/string.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="171">
+          <caret line="9" column="0" lean-forward="true" selection-start-line="9" selection-start-column="0" selection-end-line="9" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/../../spf13/pflag/uint64.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="95">
+          <caret line="5" column="5" lean-forward="false" selection-start-line="5" selection-start-column="5" selection-end-line="5" selection-end-column="5" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/../../spf13/pflag/duration.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="95">
+          <caret line="7" column="5" lean-forward="false" selection-start-line="7" selection-start-column="5" selection-end-line="7" selection-end-column="5" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/../../spf13/pflag/flag.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="142">
+          <caret line="174" column="8" lean-forward="false" selection-start-line="174" selection-start-column="8" selection-end-line="174" selection-end-column="8" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/../../spf13/pflag/flag_test.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="379">
+          <caret line="1072" column="14" lean-forward="true" selection-start-line="1072" selection-start-column="14" selection-end-line="1072" selection-end-column="14" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/token/signtoken.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="583">
+          <caret line="119" column="0" lean-forward="false" selection-start-line="119" selection-start-column="0" selection-end-line="119" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/cmd/verify.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="613">
+          <caret line="53" column="27" lean-forward="false" selection-start-line="53" selection-start-column="22" selection-end-line="53" selection-end-column="27" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/cmd/sign.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="602">
+          <caret line="51" column="48" lean-forward="false" selection-start-line="51" selection-start-column="48" selection-end-line="51" selection-end-column="48" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/token/showtoken.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="527">
+          <caret line="39" column="24" lean-forward="true" selection-start-line="39" selection-start-column="24" selection-end-line="39" selection-end-column="24" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/token/token.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="251">
+          <caret line="38" column="5" lean-forward="false" selection-start-line="38" selection-start-column="5" selection-end-line="38" selection-end-column="5" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+  </component>
+</project>
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..bcc17e1
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/cmd/root.go b/cmd/root.go
new file mode 100644
index 0000000..21057ac
--- /dev/null
+++ b/cmd/root.go
@@ -0,0 +1,84 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	homedir "github.com/mitchellh/go-homedir"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var cfgFile string
+
+// rootCmd represents the base command when called without any subcommands
+var rootCmd = &cobra.Command{
+	Use:   "jwt",
+	Short: "JWT(Json Web Token) 工具",
+	Long: `JWT(Json Web Token) 工具
+用于生成、验证、查看 JWT`,
+	Version: "v0.0.1",
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.jwt.yaml)")
+	// rootCmd.Flags().BoolP("help", "h", false, "path to JWT token to verify or '-' to read from stdin")
+	rootCmd.Flags().BoolP("version", "v", false, "show version of the jwt.")
+}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := homedir.Dir()
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+
+		// Search config in home directory with name ".jwt" (without extension).
+		viper.AddConfigPath(home)
+		viper.SetConfigName(".jwt")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		fmt.Println("Using config file:", viper.ConfigFileUsed())
+	}
+}
diff --git a/cmd/show.go b/cmd/show.go
new file mode 100644
index 0000000..ae1987f
--- /dev/null
+++ b/cmd/show.go
@@ -0,0 +1,49 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/ehlxr/jwt/token"
+	"github.com/spf13/cobra"
+)
+
+// showCmd represents the show command
+var showCmd = &cobra.Command{
+	Use:   "show",
+	Short: "查看 JWT Token",
+	Long: `
+查看 JWT Token`,
+	Run: func(cmd *cobra.Command, args []string) {
+		if err := token.ShowToken(cmd); err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(showCmd)
+
+	showCmd.Flags().StringP("token", "t", "", "path or arg of JWT token to verify, '-' to read from clipboard")
+}
diff --git a/cmd/sign.go b/cmd/sign.go
new file mode 100644
index 0000000..fc184b7
--- /dev/null
+++ b/cmd/sign.go
@@ -0,0 +1,52 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/ehlxr/jwt/token"
+	"github.com/spf13/cobra"
+)
+
+// signCmd represents the sign command
+var signCmd = &cobra.Command{
+	Use:   "sign",
+	Short: "JWT 签名",
+	Long: `
+JWT 签名`,
+	Run: func(cmd *cobra.Command, args []string) {
+		if err := token.SignToken(cmd); err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(signCmd)
+
+	signCmd.Flags().StringP("data", "d", "", "path or json to claims object to sign, '-' to read from clipboard, or '+' to use only -claim args")
+	signCmd.Flags().StringP("key", "k", "", "path of keyfile or key argument")
+	signCmd.Flags().VarP(make(token.ArgList), "claims", "c", "add additional claims. may be used more than once")
+	signCmd.Flags().VarP(make(token.ArgList), "header", "H", "add additional header params. may be used more than once")
+}
diff --git a/cmd/verify.go b/cmd/verify.go
new file mode 100644
index 0000000..dff7823
--- /dev/null
+++ b/cmd/verify.go
@@ -0,0 +1,52 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+import (
+	"os"
+
+	"github.com/ehlxr/jwt/token"
+
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// verifyCmd represents the verify command
+var verifyCmd = &cobra.Command{
+	Use:   "verify",
+	Short: "JWT token 验证",
+	Long: `
+JWT token 验证`,
+	Run: func(cmd *cobra.Command, args []string) {
+		if err := token.VerifyToken(cmd); err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(verifyCmd)
+
+	verifyCmd.Flags().StringP("token", "t", "", "path or arg of JWT token to verify, '-' to read from clipboard")
+	verifyCmd.Flags().StringP("key", "k", "", "path of keyfile or key argument")
+}
diff --git a/demo.json b/demo.json
new file mode 100644
index 0000000..da3d236
--- /dev/null
+++ b/demo.json
@@ -0,0 +1,6 @@
+{
+  "foo": "bar",
+  "exp": "2108-02-03",
+  "info": "jjjkk",
+  "other": "靠捡垃圾困了就睡打发士大夫斯柯达房间爱劳动法"
+}
\ No newline at end of file
diff --git a/demo.token b/demo.token
new file mode 100644
index 0000000..8d744d1
--- /dev/null
+++ b/demo.token
@@ -0,0 +1 @@
+eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOiIyMTA4LTAyLTAzIiwiZm9vIjoiYmFyIiwiaW5mbyI6ImpqamtrIiwib3RoZXIiOiLpnaDmjaHlnoPlnL7lm7DkuoblsLHnnaHmiZPlj5Hlo6vlpKflpKvmlq_mn6_ovr7miL_pl7TniLHlirPliqjms5UifQ.lwIz_fjoxHkgaBLUnBsRO0_zCmx4bEKNP_noW0dIGSSV5dPReb_E41Dg38G0ZB6tUFgH9k7aKsUUdMO3-ixRQ-nVT7qryLVti72G7Bpxy-_0FcwPWsvOl1ic8wCMtXLcL2FmcxFt4VC7nky1iAMCYn0iWyBxuPboNxBYNJF2TYB5rsfoLGgQ-okFVahZWDrdiepIlwFh-SkzrgLYzFhUgfCvCOFyTn65aNzJxY_3vxd4OSl6ks8C6J1qF7FZbFVFpcaHebZHjqg2rS3q0CdhN1IpGhEHC4dktpbeAzUYTPaohJWa-Rftthg4iM9DOFz8NBB_rNxyCYBfsbcywk8X2g
\ No newline at end of file
diff --git a/key/private-key.pem b/key/private-key.pem
new file mode 100644
index 0000000..5e61a0b
--- /dev/null
+++ b/key/private-key.pem
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/key/public-key.pem b/key/public-key.pem
new file mode 100644
index 0000000..08ac1bb
--- /dev/null
+++ b/key/public-key.pem
@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtLcqUewX4sOPUUcocUi4
+EMMi25I52j9AHpphV4xZ5uUBzUuEsEuomPhvpElrVGAnla6856nrsSOTnw/pQ+wH
+kZLXXBbJOqdOH8wohch6v3lJoJDSFsCc+Y2OfolxZ8qz1Qq+AyvFGv4NIM0rWsfo
+srSsMDnQzLFtUoAfCMGU4uas2H1uWfh+dDaABgxshAtmBuTyFJ/q36mGAznGzN7j
+VUSxv+pgI6AyEgxiIKOmFrz9qm6Ns/H9fONQznnZouFZc0p3PME4xJcpdjET2tpA
+CBZr6p7znFCm7t2BMrC37wznHUxCxP3XOugH9fs90EXV3XwPHZTAkvxvs8fpeDfG
+hwIDAQAB
+-----END PUBLIC KEY-----
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..3de5a99
--- /dev/null
+++ b/main.go
@@ -0,0 +1,27 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package main
+
+import "github.com/ehlxr/jwt/cmd"
+
+func main() {
+	cmd.Execute()
+}
diff --git a/token/showtoken.go b/token/showtoken.go
new file mode 100644
index 0000000..ea9ac57
--- /dev/null
+++ b/token/showtoken.go
@@ -0,0 +1,68 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package token
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+
+	jwt "github.com/dgrijalva/jwt-go"
+
+	"github.com/spf13/cobra"
+)
+
+// showToken pretty-prints the token on the command line.
+func ShowToken(cmd *cobra.Command) error {
+	flagToken := cmd.LocalFlags().Lookup("token").Value.String()
+	flagDebug := promptDebug()
+	flagCompact := promptCompact()
+
+	// get the token
+	tokData, err := loadData(flagToken)
+	if err != nil {
+		return fmt.Errorf("Couldn't read token: %v", err)
+	}
+
+	// trim possible whitespace from token
+	tokData = regexp.MustCompile(`\s*$`).ReplaceAll(tokData, []byte{})
+	if flagDebug {
+		fmt.Fprintf(os.Stderr, "Token len: %v bytes\n", len(tokData))
+	}
+
+	token, err := jwt.Parse(string(tokData), nil)
+	if token == nil {
+		return fmt.Errorf("malformed token: %v", err)
+	}
+
+	// Print the token details
+	fmt.Println("Header:")
+	if err := printJSON(token.Header, flagCompact); err != nil {
+		return fmt.Errorf("Failed to output header: %v", err)
+	}
+
+	fmt.Println("Claims:")
+	if err := printJSON(token.Claims, flagCompact); err != nil {
+		return fmt.Errorf("Failed to output claims: %v", err)
+	}
+
+	return nil
+}
diff --git a/token/signtoken.go b/token/signtoken.go
new file mode 100644
index 0000000..9d8d22d
--- /dev/null
+++ b/token/signtoken.go
@@ -0,0 +1,122 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package token
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/atotto/clipboard"
+
+	jwt "github.com/dgrijalva/jwt-go"
+
+	"github.com/spf13/cobra"
+)
+
+// Create, sign, and output a token.  This is a great, simple example of
+// how to use this library to create and sign a token.
+func SignToken(cmd *cobra.Command) error {
+	flagData := cmd.LocalFlags().Lookup("data").Value.String()
+	flagClaims := cmd.LocalFlags().Lookup("claims").Value.(ArgList)
+	flagHead := cmd.LocalFlags().Lookup("header").Value.(ArgList)
+	flagKey := cmd.LocalFlags().Lookup("key").Value.String()
+	flagDebug := promptDebug()
+
+	flagAlg, err := promptAlg()
+	if err != nil {
+		return fmt.Errorf("Prompt flagAlg failed %v\n", err)
+	}
+
+	// get the token data from command line arguments
+	tokData, err := loadData(flagData)
+	if err != nil {
+		return fmt.Errorf("Couldn't read data: %v", err)
+	} else if flagDebug {
+		fmt.Fprintf(os.Stderr, "Token len: %v bytes\n", len(tokData))
+		fmt.Fprintf(os.Stderr, "Token data: %v \n", string(tokData))
+	}
+
+	// parse the JSON of the claims
+	var claims jwt.MapClaims
+	if err := json.Unmarshal(tokData, &claims); err != nil {
+		return fmt.Errorf("Couldn't parse claims JSON: %v", err)
+	}
+
+	// add command line claims
+	if len(flagClaims) > 0 {
+		for k, v := range flagClaims {
+			claims[k] = v
+		}
+	}
+
+	// get the key
+	var key interface{}
+	key, err = loadData(flagKey)
+	if err != nil {
+		return fmt.Errorf("Couldn't read key: %v", err)
+	}
+
+	// get the signing alg
+	alg := jwt.GetSigningMethod(flagAlg)
+	if alg == nil {
+		return fmt.Errorf("Couldn't find signing method alg: %v", flagAlg)
+	}
+
+	// create a new token
+	token := jwt.NewWithClaims(alg, claims)
+
+	// add command line headers
+	if len(flagHead) > 0 {
+		for k, v := range flagHead {
+			token.Header[k] = v
+		}
+	}
+
+	if isEs(flagAlg) {
+		if k, ok := key.([]byte); !ok {
+			return fmt.Errorf("Couldn't convert key data to key")
+		} else {
+			key, err = jwt.ParseECPrivateKeyFromPEM(k)
+			if err != nil {
+				return err
+			}
+		}
+	} else if isRs(flagAlg) {
+		if k, ok := key.([]byte); !ok {
+			return fmt.Errorf("Couldn't convert key data to key")
+		} else {
+			key, err = jwt.ParseRSAPrivateKeyFromPEM(k)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	if out, err := token.SignedString(key); err == nil {
+		fmt.Println(out)
+		clipboard.WriteAll(out)
+	} else {
+		return fmt.Errorf("Error signing token: %v", err)
+	}
+
+	return nil
+}
diff --git a/token/token.go b/token/token.go
new file mode 100644
index 0000000..2aab6a6
--- /dev/null
+++ b/token/token.go
@@ -0,0 +1,163 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package token
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/atotto/clipboard"
+
+	"github.com/manifoldco/promptui"
+)
+
+// Helper func:  Read input from specified file or string
+func loadData(p string) ([]byte, error) {
+	if p == "" {
+		return nil, fmt.Errorf("No path or arg specified")
+	}
+
+	var rdr io.Reader
+	if p == "-" {
+		t, _ := clipboard.ReadAll()
+		fmt.Printf("read data from clipboard: %s\n", t)
+		rdr = strings.NewReader(t)
+	} else if p == "+" {
+		return []byte("{}"), nil
+	} else {
+		is, path := isPath(p)
+		if is {
+			if f, err := os.Open(path); err == nil {
+				rdr = f
+				defer f.Close()
+			} else {
+				return nil, err
+			}
+		} else {
+			rdr = strings.NewReader(p)
+		}
+	}
+	return ioutil.ReadAll(rdr)
+}
+
+func isPath(path string) (bool, string) {
+	p, err := filepath.Abs("")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	absPath := filepath.Join(p, strings.Replace(path, p, "", 1))
+	_, err = os.Stat(absPath)
+	if err == nil {
+		return true, absPath
+	}
+	return false, ""
+}
+
+// Print a json object in accordance with the prophecy (or the command line options)
+func printJSON(j interface{}, flagCompact bool) error {
+	var out []byte
+	var err error
+
+	if flagCompact == false {
+		out, err = json.MarshalIndent(j, "", "    ")
+	} else {
+		out, err = json.Marshal(j)
+	}
+
+	if err == nil {
+		fmt.Println(string(out))
+	}
+
+	return err
+}
+
+func isEs(flagAlg string) bool {
+	return strings.HasPrefix(flagAlg, "ES")
+}
+
+func isRs(flagAlg string) bool {
+	return strings.HasPrefix(flagAlg, "RS")
+}
+
+func promptAlg() (string, error) {
+	prompt := promptui.SelectWithAdd{
+		Label:    "select a signing algorithm identifier",
+		Items:    []string{"HS256", "RS256"},
+		AddLabel: "Other",
+	}
+	_, flagAlg, err := prompt.Run()
+	if err != nil {
+		return "", fmt.Errorf("Prompt flagAlg failed %v\n", err)
+	}
+
+	return flagAlg, nil
+}
+
+func promptDebug() bool {
+	prompt := promptui.Prompt{
+		Label:     "print out all kinds of debug data",
+		IsConfirm: true,
+	}
+
+	if _, err := prompt.Run(); err != nil {
+		return false
+	}
+	return true
+}
+
+func promptCompact() bool {
+	prompt := promptui.Prompt{
+		Label:     "output compact JSON",
+		IsConfirm: true,
+	}
+
+	if _, err := prompt.Run(); err != nil {
+		return false
+	}
+	return true
+}
+
+type ArgList map[string]string
+
+func (l ArgList) String() string {
+	data, _ := json.Marshal(l)
+	return string(data)
+}
+
+func (l ArgList) Set(arg string) error {
+	parts := strings.SplitN(arg, "=", 2)
+	if len(parts) != 2 {
+		return fmt.Errorf("Invalid argument '%v'.  Must use format 'key=value'. %v", arg, parts)
+	}
+	l[parts[0]] = parts[1]
+	return nil
+}
+
+func (l ArgList) Type() string {
+	return "argList"
+}
diff --git a/token/verifytoken.go b/token/verifytoken.go
new file mode 100644
index 0000000..04abe8c
--- /dev/null
+++ b/token/verifytoken.go
@@ -0,0 +1,93 @@
+// Copyright © 2018 ehlxr <ehlxr.me@gmail.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package token
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+
+	jwt "github.com/dgrijalva/jwt-go"
+	"github.com/spf13/cobra"
+)
+
+// Verify a token and output the claims.  This is a great example
+// of how to verify and view a token.
+func VerifyToken(cmd *cobra.Command) error {
+	flagToken := cmd.LocalFlags().Lookup("token").Value.String()
+	flagKey := cmd.LocalFlags().Lookup("key").Value.String()
+	flagCompact := promptCompact()
+	flagDebug := promptDebug()
+
+	flagAlg, err := promptAlg()
+	if err != nil {
+		return fmt.Errorf("Prompt flagAlg failed %v\n", err)
+	}
+
+	// get the token
+	tokData, err := loadData(flagToken)
+	if err != nil {
+		return fmt.Errorf("Couldn't read token: %v", err)
+	}
+
+	// trim possible whitespace from token
+	tokData = regexp.MustCompile(`\s*$`).ReplaceAll(tokData, []byte{})
+	if flagDebug {
+		fmt.Fprintf(os.Stderr, "Token len: %v bytes\n", len(tokData))
+	}
+
+	// Parse the token.  Load the key from command line option
+	token, err := jwt.Parse(string(tokData), func(t *jwt.Token) (interface{}, error) {
+		data, err := loadData(flagKey)
+		if err != nil {
+			return nil, err
+		}
+		if isEs(flagAlg) {
+			return jwt.ParseECPublicKeyFromPEM(data)
+		} else if isRs(flagAlg) {
+			return jwt.ParseRSAPublicKeyFromPEM(data)
+		}
+		return data, nil
+	})
+
+	// Print some debug data
+	if flagDebug && token != nil {
+		fmt.Fprintf(os.Stderr, "Header:\n%v\n", token.Header)
+		fmt.Fprintf(os.Stderr, "Claims:\n%v\n", token.Claims)
+	}
+
+	// Print an error if we can't parse for some reason
+	if err != nil {
+		return fmt.Errorf("Couldn't parse token: %v", err)
+	}
+
+	// Is token invalid?
+	if !token.Valid {
+		return fmt.Errorf("Token is invalid")
+	}
+
+	// Print the token details
+	if err := printJSON(token.Claims, flagCompact); err != nil {
+		return fmt.Errorf("Failed to output claims: %v", err)
+	}
+
+	return nil
+}