This is an otherwise "valid" input to ParseCertificate(), however there is a
trailing NULL after the signature field.


$ openssl asn1parse -i < [CERTIFICATE]
    0:d=0  hl=2 l=  14 cons: SEQUENCE          
    2:d=1  hl=2 l=   2 cons:  SEQUENCE          
    4:d=2  hl=2 l=   0 prim:   NULL              
    6:d=1  hl=2 l=   2 cons:  SEQUENCE          
    8:d=2  hl=2 l=   0 prim:   NULL              
   10:d=1  hl=2 l=   2 prim:  BIT STRING        
   14:d=1  hl=2 l=   0 prim:  NULL              
-----BEGIN CERTIFICATE-----
MA4wAgUAMAIFAAMCAKwFAA==
-----END CERTIFICATE-----

ERROR: Unconsumed data inside Certificate SEQUENCE

-----BEGIN ERRORS-----
RVJST1I6IFVuY29uc3VtZWQgZGF0YSBpbnNpZGUgQ2VydGlmaWNhdGUgU0VRVUVOQ0UK
-----END ERRORS-----