How to encrypte the password for basic authentication of Solr

[tjlp]

 Hi,
In the Wiki 
https://cwiki.apache.org/confluence/display/solr/Basic+Authentication+Plugin, 
the basic authentication is introduced. With basic authentication, the sample 
security.json has the line 

"credentials":{"solr":"IV0EHq1OnNrj6gvRCwvFwTrZ1+z1oBbnQdiVC3otuq0= 
Ndd7LKvVBAaZIF0QAVi1ekCfAJXr1GGfLtRUXhgrF8c="}
How to get the encrypted password for the user solr?
ThanksLiu Peng