fix(package): max 20 octets for serial (#141)

* fix(package): parse serial and fix getDhparamInfo (#136)

* chore(package): update semantic-release to version 8.0.0

* Add OpenSSL Matrix

* make test use of self builded "/openssl/bin/openssl"

* fix getDhparamInfo

* Fix Tests for Travis and Empty OPENSSL_DIR

* * chore(package): Reviewautomatedtests (#138)

* chore(package): update semantic-release to version 8.0.0

* review tests; standardjs; changelog; grunt removal

* fix(travis): build travis with `npm run test`

* fix(tests): password must be 4 to 1023 characters

* chore(build): move back after build

* fix(package): max 20 octcts for serial

A certificate serial number is not decimal conforming. That is the bytes in a serial number do not necessarily map to a printable ASCII character.
eg: 0x00 is a valid serial number and can not be represented in a human readable format (atleast one that can be directly mapped to the ACSII table).

fix #84

lib/pem.js

@@ -315,7 +315,14 @@ function createCertificate (options, callback) {
     params.push('--TMPFILE--')
     if (options.serial) {
       params.push('-set_serial')
-      params.push('0x' + ('00000000' + options.serial.toString(16)).slice(-8))
+      // set the serial to the max lenth of 20 octets ()
+      // A certificate serial number is not decimal conforming. That is the
+      // bytes in a serial number do not necessarily map to a printable ASCII
+      // character.
+      // eg: 0x00 is a valid serial number and can not be represented in a
+      // human readable format (atleast one that can be directly mapped to
+      // the ACSII table).
+      params.push('0x' + ('0000000000000000000000000000000000000000' + options.serial.toString(16)).slice(-40))
     } else {
       params.push('-CAcreateserial')
     }