$ openssl asn1parse -i < [BASIC CONSTRAINTS]
    0:d=0  hl=2 l=  29 cons: SEQUENCE          
    2:d=1  hl=2 l=   1 prim:  BOOLEAN           :255
    5:d=1  hl=2 l=  24 prim:  INTEGER           :0FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
-----BEGIN BASIC CONSTRAINTS-----
MB0BAf8CGA///////////////////////////////w==
-----END BASIC CONSTRAINTS-----