what's the best way to store username/password for Ant SCP task

Question

I need use a scp task to transfer a whole folder with many sub-folders and files. Currently I use below way:

<plugin>
    <artifactId>maven-antrun-plugin</artifactId>
    <version>1.7</version>
    <executions>
        <execution>
        <phase>validate</phase>
        <configuration>
            <tasks>
            <mkdir dir="${project.build.directory}/yy" />                     
            <scp file="user:password@host:/home/xx/yy/*" todir="${project.build.directory}/yy" trust="yes"/>
            </tasks>
        </configuration>
        <goals>
            <goal>run</goal>
        </goals>
        </execution>
    </executions>
    <dependencies>
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant-jsch</artifactId>
            <version>1.7.1</version>
        </dependency>
    </dependencies>
</plugin>   

And it also works if I hard code username and password. But I don't want to make this public in code base. So I make it store in maven-settings.xml like below:

pom.xml

<scp file="${scpUserName}:${scpUserPassword}@company.net:/home/xx/yy/*" todir="${project.build.directory}/yy" trust="yes"/>

settings.xml

<profiles>
    <profile>
        <id>unix</id>
        <activation>
            <os>
                <family>unix</family>
            </os>           
        </activation>
        <properties>
            <scpUserName>xxx</scpUserName>
            <scpUserPassword>xxx</scpUserPassword>
        </properties>
    </profile>
</profiles> 

But I still need make username/password public in Teamcity server so that all agent servers can build whole project successfully. I wonder if there are any better way for this?

Answer 1

Maven documentation explains. First create a master password

mvn --encrypt-master-password <password>

Enter the result into settings-security.xml

<settingsSecurity>
  <master>the result here</master>
</settingsSecurity>

For the individual passwords, encrypt like this

mvn --encrypt-password <password>

And you can use it directly in your Maven plugin

<properties>
    <scpUserName>xxx<sscpUserName>
    <scpUserPassword>the result here</scpUserPassword>
</properties>

When your build server invokes Maven, you will need to supply the master password. You can do so by storing the password using a password vault or something.