## SignJar

### Description

Signs jar or zip files with the javasign command line tool. The tool detailed dependency checking: files are only signed if they are not signed. The `signjar` attribute can point to the file to generate; if this file exists then its modification date is used as a cue as to whether to resign any JAR file.

### Parameters

Attribute | Description | Required
jar | the jar file to sign | Yes, unless nested filesets have been used.
alias | the alias to sign under | Yes.
storepass | password for keystore integrity. | Yes.
keystore | keystore location | No
storetype | keystore type | No
keypass | password for private key (if different) | No
sigfile | name of .SF/.DSA file | No
signedjar | name of signed JAR file | No
verbose | (true | false) verbose output when signing | No; default false
internalsf | (true | false) include the .SF file inside the signature block | No; default false
sectionsonly | (true | false) don't compute hash of entire manifest | No; default false
lazy | flag to control whether the presence of a signature file means a JAR is signed | 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
preservelastmodified | Give the signed file the same last modified time as the original jar file. | No; default false.

### Parameters as nested elements

Attribute | Description | Required
fileset | fileset of JAR files to sign. Will be ignored if the jar attribute of the task has been set. | No

### Examples

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

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

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