Empty octet String

[ilikeck]

I encode the data ( esim profile )" { createFCP : { fileDescriptor '4121'H, fileID '6fc4'H, lcsi '05'H, securityAttributesReferenced '03'H, efFileSize '64'H, shortEFID ''H } " but shortEFID ''H I don't know how to do using jasn1 because shortEFID ''H has length zero without value.

[sfeuerhahn]

You can simply pass an empty byte array to shortEFID. Empty octet strings are no problem.