Created attachment 1441245 [details]
Test case to replicate error

Description of problem:
Creating a CRL entry with a CRL Reason of "unspecified" (which has a value of 0) results in an encoding error due to the way JSS encodes ASN.1 enumerations in DerOutputStream.  Instead of encoding the enumeration as 0x0A0100, the value portion of the TLV is omitted and it's encoded as 0x0A00.

From what I can tell from X.690 (https://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf), "The encoding of an enumerated value shall be that 
of the integer value with which it is associated" and for integers "The encoding of an integer value shall be primitive. The contents octets shall consist of one or more octets."


Version-Release number of selected component (if applicable): 4.4


How reproducible: Always


Steps to Reproduce:
1. Compile and run the attached test case:

% javac -cp ~/.m2/repository/org/mozilla/jss/4.4.0/jss-4.4.0.jar EnumerationZeroTest.java                                               

% java -cp ~/.m2/repository/org/mozilla/jss/4.4.0/jss-4.4.0.jar:. -Djava.library.path=/usr/lib64/jss EnumerationZeroTest


Actual results: The JDK X509CRL class cannot parse the generated CRL due to the way that the CRL reason is encoded.  Instead of being encoded as 0x0A0100, it's encoded as 0x0A00.

Full encoded extension: 30090603551d1504020a00  Encoded CRL Reason: 0a00        Reason value: 0
Full encoded extension: 300a0603551d1504030a0101        Encoded CRL Reason: 0a0101      Reason value: 1

The JDK then throws an error when attempting to generate the CRL: "java.security.cert.CRLException: Invalid encoding: zero length Int value"


Expected results: The reason is encoded as 0x0A0100