l= 0 cons: cont [ 0 ] 444:d=1 hl=2 l= 13 cons: SEQUENCE 446:d=2 hl=2 l= 9 prim: OBJECT :md5WithRSAEncryption 457:d=2 hl=2 l= 0 prim: NULL 459:d=1 hl=4 l= 257 prim: BIT STRING This was generated by supplying the base64 encoding into the command openssl asn1parse -in your_request -inform PEM -i where PEM stands for Privacy-Enhanced Mail and describes the encoding of the ASN.1 Distinguished Encoding Rules in base64. See also SPKAC X.509 References Cryptography standards