Migrate User Passwords from Liferay 4.4.2 to Liferay 6.0.6

Question

Have some users in Liferay 4.4.2 that are currently active, all having valid passwords. Have the same users in Liferay 6.0.6, all of them added with a default password.

Can you suggest a way where I can migrate the passwords of users from Liferay 4.4.2 to Liferay 6.0.6?

Tried copying the passwords directy through DB in the users table (I know its not adviced, but I had to start somewhere). Didn't work out.

The encryption algorithm used in both the versions is MD5. Is there a difference in the encoding digest? There is no Digest Column in Liferay 4.4.2, but can see one in Liferay 6.0.6

How can I migrate the passwords?

Answer 1

Currently using Forgot Password functionality to intimate the users to change their passwords which I know is hectic. This is how I did it:

ThemeDisplay themeDisplay = (ThemeDisplay) actionRequest.getAttribute(WebKeys.THEME_DISPLAY);
Company company = themeDisplay.getCompany();
ServiceContext serviceContext = ServiceContextFactory.getInstance(PortalUtil.getHttpServletRequest(actionRequest));
//Replace the variables with corresponding values
UserLocalServiceUtil.sendPassword(companyId, emailAddress, remoteAddr, remoteHost, userAgent, fromName, fromAddress, subject, body, serviceContext);

Any better solutions are welcome.