Validate regex for PrimeFaces Password - regex

Question

I have password and repeat password fields,But I want to validate passwords depending on validate regex pattern along with matching both the password fields too.
<p:outputLabel for="Password" value="Password" />
<p:password id="Password" redisplay="true"
value="#{newUserBean.newUserDTO.password}" match="RepeatPassword"
label="Password" required="true"
requiredMessage="Password is required, cannot be empty"
validatorMessage="Password and Repeat Password fields must be same" feedback="true"
promptLabel="Password should contain atleast 8 characters ,1 number and 1 special character" >
</p:password>
<p:outputLabel for="RepeatPassword" value="Repeat Password" />
<p:password id="RepeatPassword" redisplay="true"
value="#{newUserBean.newUserDTO.password}" label="RepeatPassword"
required="true"
requiredMessage="Password is required, cannot be empty" feedback="true"
promptLabel="Repeat Password should match with Password">
</p:password>

Answer 1

Make changes as below
<p:outputLabel for="Password" value="Password" />
<p:password id="Password" redisplay="true"
value="#{newUserBean.newUserDTO.password}"validator="#{passwordValidator.validate}"
label="Password" required="true"
requiredMessage="Password is required, cannot be empty"
validatorMessage="Password and Repeat Password fields must be same" feedback="true"
promptLabel="Password should contain atleast 8 characters ,1 number and 1 special character" >
<p:ajax event="blur" update="msgfrpassword" />
</p:password>
<p:outputLabel for="RepeatPassword" value="Repeat Password" />
<p:password id="RepeatPassword" redisplay="true"
value="#{newUserBean.newUserDTO.password}" label="RepeatPassword" validator="#{confirmPasswordValidator.validate}"
required="true"
requiredMessage="Password is required, cannot be empty" feedback="true"
promptLabel="Repeat Password should match with Password">
<p:ajax event="blur" update="msgfrpassword" />
</p:password>
Override java validator to verify regex and compare repeat password and password
PasswordValidatorBean
#Override
public void validate(FacesContext context, UIComponent component,
Object value) throws ValidatorException {
matcher = pattern.matcher(value.toString());
if (!matcher.matches()) {
FacesMessage msg = new FacesMessage(
new MessageProvider()
.getValue("prometheus_passwordpromptlable"));
msg.setSeverity(FacesMessage.SEVERITY_ERROR);
throw new ValidatorException(msg);
}
}

Answer 2

If we assume you need a regex to be both suitable for running on server and client side, I can suggest this regex that
checks the password length - .{8,}
makes sure there is at least 1 digit - (?=.*[0-9].*$)
and 1 special character (please define what special character means for you, add or remove accordingly) - (?=.*[-+()[\]~!##$%^&*+}{":;'/?.><,\].*$)`
Regex:
^(?=.*[-+()[\]~!##$%^&*+}{":;'/?.><,`\\].*$)(?=.*[0-9].*$).{8,}$