To change the type of encryption using the command line, issue the following command:
idsldapmodify -p port -D adminDN -w adminPW -i filename
where filename contains:
dn: cn=configuration
changetype: modify
replace: ibm-slapdPWEncryption
ibm-slapdPWEncryption: password_encryption_mechanism
Here, the ibm-slapdPWEncryption attribute can be assigned any of the
following values: none,aes128,aes192,aes256,crypt,sha,ssha, md5
sha224, sha256, sha384, sha512, ssha224, ssha256, ssha384, or ssha512.
To cause the updated settings to take effect dynamically, issue the following idsldapexop command:
idsldapexop -D adminDN -w adminPW -op readconfig -scope single
"cn=configuration" ibm-slapdPWEncryption
The information is from Knowledge Center