VerifyJar Task

## VerifyJar

### Description

Verifies JAR files with the `jarsigner` command line tool. It will take a named file in the `jar` attribute. Nested paths are also supported

### Parameters

Attribute | Description | Required
jar | the jar file to verify | Yes, unless nested paths have been used.
alias | the alias to verify under | Yes.
storepass | password for keystore integrity. | Yes.
keystore | keystore location | No
storetype | keystore type | No
keypass | password for private key (if different) | No
certificates | (true | false) display information about certificates | No; default false
verbose | (true | false) verbose output when verifying | No; default false
strict | (true | false) strict checking when verifying. since Ant 1.9.1. | No; default false
maxmemory | Specifies the maximum memory the jarsigner VM will use. Specified in the style of standard java memory specs (e.g. 128m = 128 MBytes) | No
executable | Specify a particular `jarsigner` executable to use in place of the default binary (found in the same JDK as Apache Ant is running in). Must support the same command line options as the Sun JDK jarsigner command. since Ant 1.8.0. | No

### Parameters as nested elements

Attribute | Description | Required
path | path of JAR files to verify. since Ant 1.7 | No
fileset | fileset of JAR files to verify. | No
sysproperty | JVM system properties, with the syntax of Ant environment variables | No, and only one can be supplied

### Examples

>     <verifyjar jar="${dist}/lib/ant.jar"
>     alias="apache-group" storepass="secret"/>

verifies the ant.jar with alias "apache-group" accessing the keystore and private key via "secret" password.