1This is a very basic TBSCertificate which would be valid except the version 2number is v4 (3). 3 4 5$ openssl asn1parse -i < [TBS CERTIFICATE] 6 0:d=0 hl=2 l= 60 cons: SEQUENCE 7 2:d=1 hl=2 l= 3 cons: cont [ 0 ] 8 4:d=2 hl=2 l= 1 prim: INTEGER :03 9 7:d=1 hl=2 l= 1 prim: INTEGER :01 10 10:d=1 hl=2 l= 3 cons: SEQUENCE 11 12:d=2 hl=2 l= 1 prim: OCTET STRING [HEX DUMP]:01 12 15:d=1 hl=2 l= 3 cons: SEQUENCE 13 17:d=2 hl=2 l= 1 prim: OCTET STRING [HEX DUMP]:05 14 20:d=1 hl=2 l= 30 cons: SEQUENCE 15 22:d=2 hl=2 l= 13 prim: UTCTIME :121018031200Z 16 37:d=2 hl=2 l= 13 prim: UTCTIME :131018145959Z 17 52:d=1 hl=2 l= 3 cons: SEQUENCE 18 54:d=2 hl=2 l= 1 prim: OCTET STRING [HEX DUMP]:83 19 57:d=1 hl=2 l= 3 cons: SEQUENCE 20 59:d=2 hl=2 l= 1 prim: OCTET STRING [HEX DUMP]:F3 21-----BEGIN TBS CERTIFICATE----- 22MDygAwIBAwIBATADBAEBMAMEAQUwHhcNMTIxMDE4MDMxMjAwWhcNMTMxMDE4MTQ1OTU5WjADBAG 23DMAMEAfM= 24-----END TBS CERTIFICATE----- 25 26ERROR: Failed parsing version 27 28-----BEGIN ERRORS----- 29RVJST1I6IEZhaWxlZCBwYXJzaW5nIHZlcnNpb24K 30-----END ERRORS-----