java - Hashalgorithm and hashencoding -

i using build in jboss login-module. has encode user entered password , compare encrypted password in db.

<module-option name="hashalgorithm" value="md5"/> <module-option name="hashencoding" value="base64"/> 

for storing password in db use following line

newuser.setpassword(datatypeconverter.printbase64binary(purepassword.getbytes("utf-8"))); 

when debug application appears:

• encrypted password db = mtizndu2nzg=
• encrypted password user login = jdva0ooqqar0zmdtctwhrq==

questions:

1. what happening? when jboss use base64 algorithm , when md5
2. what difference between hashalgorithm , hashencoding?

1. what happening? when jboss use base64 algorithm , when md5

md5 hash algorithm , base64 output character encoding.

a character encoding defines characters correspond byte or series of bytes.

md5 cryptographic hash algorithm produces 16-byte output of 8-bit bytes, not characters. not 8-bit bytes printable characters.

base64 accepts array of bytes , produces printable character string. used array of bytes needs encoded printable character string.

2. what difference between hashalgorithm , hashencoding?

some hash functions allow specification of hash algorithm hashalgorithm such md5, sha1, sha-256, etc used hash output encoding hashencoding such hexadecimal or base64. allows 1 function call both hash input selected hash algorithm , selected output encoding in 1 call.