This is an otherwise valid input to ParseSignature(), however the signature was
changed from a BIT STRING to an OCTET STRING.


$ openssl asn1parse -i < [CERTIFICATE]
    0:d=0  hl=2 l=  12 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:  OCTET STRING      [HEX DUMP]:0102
-----BEGIN CERTIFICATE-----
MAwwAgUAMAIFAAQCAQI=
-----END CERTIFICATE-----

ERROR: Couldn't read Certificate.signatureValue as BIT STRING

-----BEGIN ERRORS-----
RVJST1I6IENvdWxkbid0IHJlYWQgQ2VydGlmaWNhdGUuc2lnbmF0dXJlVmFsdWUgYXMgQklUIFNUUklORwo=
-----END ERRORS-----