Error decrypting datasource password with SecureIdentityLoginModule

During password decryption using SecureIdentityLoginModule there could be an error due to missing leading zeros for certain passwords.
This error might appear in the log:

[SecureIdentityLoginModule] Failed to decode password
javax.crypto.IllegalBlockSizeException: Input length must be multiple of 8 when decrypting with padded cipher
at com.sun.crypto.provider.SunJCE_h.b(DashoA12275)
at com.sun.crypto.provider.SunJCE_h.b(DashoA12275)
at com.sun.crypto.provider.BlowfishCipher.engineDoFinal(DashoA12275)
at javax.crypto.Cipher.doFinal(DashoA12275)
at org.jboss.resource.security.SecureIdentityLoginModule.decode(SecureIdentityLoginModule.java:173)
at org.jboss.resource.security.SecureIdentityLoginModule.commit(SecureIdentityLoginModule.java:114)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at javax.security.auth.login.LoginContext.invoke(LoginContext.java:769)
at javax.security.auth.login.LoginContext.access$000(LoginContext.java:186)