On 11/7/23 07:41, Robert Moskowitz wrote:
I just checke my draft:

draft-moskowitz-ec-pki/draft-moskowitz-ec-pki

And there are no actual examples.  So I looked in my files where I did the testing for writing this and here is a 1AR DER:

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----


See what you get when you cbor it!

openssl x509 -noout -text -in /home/rgm/data/ca/8021ARintermediate/certs/Wt1234.cert.pem
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 5840551686194305606 (0x510dced063eb9a46)
        Signature Algorithm: ecdsa-with-SHA256
        Issuer: C = US, ST = MI, L = Oak Park, O = HTT Consulting, CN = Root CA
        Validity
            Not Before: Aug 18 18:41:11 2017 GMT
            Not After : Dec 31 23:59:59 9999 GMT
        Subject: O = HTT Consulting, OU = Devices, serialNumber = Wt1234
        Subject Public Key Info:
            Public Key Algorithm: id-ecPublicKey
                Public-Key: (256 bit)
                pub:
                    04:83:34:3e:4b:47:5b:62:d4:11:75:0a:27:bb:b1:
                    bb:d8:b4:fc:4a:03:9e:71:0d:5a:fa:49:b5:0f:b5:
                    f9:10:96:ec:7f:dc:6e:e5:77:57:fb:13:a4:2c:b5:
                    1e:37:8c:d7:ed:63:6a:f7:15:ec:1a:f6:1f:b9:35:
                    57:00:92:14:99
                ASN1 OID: prime256v1
                NIST CURVE: P-256
        X509v3 extensions:
            X509v3 Basic Constraints:
                CA:FALSE
            X509v3 Authority Key Identifier:
keyid:26:FD:85:A5:1A:A9:7F:B4:D7:9D:39:C6:84:CC:7C:78:D1:4A:FF:82
                DirName:/C=US/ST=MI/L=Oak Park/O=HTT Consulting/CN=Root CA
                serial:F2:61:D5:02:50:A6:CE:AA
            X509v3 Key Usage: critical
                Digital Signature, Key Encipherment
            X509v3 Subject Alternative Name:
                othername: 1.3.6.1.5.5.7.8.4::<unsupported>
    Signature Algorithm: ecdsa-with-SHA256
    Signature Value:
        30:45:02:21:00:cf:f9:6b:30:d8:d9:3b:e6:9a:1a:2f:ac:76:
        c9:87:c1:24:16:26:36:84:88:19:c2:c8:9a:b9:ee:38:99:6f:
        70:02:20:6b:cc:62:aa:ab:b6:09:c3:3c:e3:3f:b4:34:3d:50:
        09:b6:cc:4c:cd:9a:b2:e6:18:2f:ba:c4:90:cb:c6:a4:c6

openssl asn1parse -i -in /home/rgm/data/ca/8021ARintermediate/certs/Wt1234.cert.pem
    0:d=0  hl=4 l= 611 cons: SEQUENCE
    4:d=1  hl=4 l= 521 cons:  SEQUENCE
    8:d=2  hl=2 l=   3 cons:   cont [ 0 ]
   10:d=3  hl=2 l=   1 prim:    INTEGER           :02
   13:d=2  hl=2 l=   8 prim:   INTEGER           :510DCED063EB9A46
   23:d=2  hl=2 l=  10 cons:   SEQUENCE
   25:d=3  hl=2 l=   8 prim:    OBJECT            :ecdsa-with-SHA256
   35:d=2  hl=2 l=  88 cons:   SEQUENCE
   37:d=3  hl=2 l=  11 cons:    SET
   39:d=4  hl=2 l=   9 cons:     SEQUENCE
   41:d=5  hl=2 l=   3 prim:      OBJECT            :countryName
   46:d=5  hl=2 l=   2 prim:      PRINTABLESTRING   :US
   50:d=3  hl=2 l=  11 cons:    SET
   52:d=4  hl=2 l=   9 cons:     SEQUENCE
   54:d=5  hl=2 l=   3 prim:      OBJECT :stateOrProvinceName
   59:d=5  hl=2 l=   2 prim:      UTF8STRING        :MI
   63:d=3  hl=2 l=  17 cons:    SET
   65:d=4  hl=2 l=  15 cons:     SEQUENCE
   67:d=5  hl=2 l=   3 prim:      OBJECT            :localityName
   72:d=5  hl=2 l=   8 prim:      UTF8STRING        :Oak Park
   82:d=3  hl=2 l=  23 cons:    SET
   84:d=4  hl=2 l=  21 cons:     SEQUENCE
   86:d=5  hl=2 l=   3 prim:      OBJECT :organizationName
   91:d=5  hl=2 l=  14 prim:      UTF8STRING        :HTT Consulting
  107:d=3  hl=2 l=  16 cons:    SET
  109:d=4  hl=2 l=  14 cons:     SEQUENCE
  111:d=5  hl=2 l=   3 prim:      OBJECT            :commonName
  116:d=5  hl=2 l=   7 prim:      UTF8STRING        :Root CA
  125:d=2  hl=2 l=  32 cons:   SEQUENCE
  127:d=3  hl=2 l=  13 prim:    UTCTIME           :170818184111Z
  142:d=3  hl=2 l=  15 prim:    GENERALIZEDTIME   :99991231235959Z
  159:d=2  hl=2 l=  60 cons:   SEQUENCE
  161:d=3  hl=2 l=  23 cons:    SET
  163:d=4  hl=2 l=  21 cons:     SEQUENCE
  165:d=5  hl=2 l=   3 prim:      OBJECT :organizationName
  170:d=5  hl=2 l=  14 prim:      UTF8STRING        :HTT Consulting
  186:d=3  hl=2 l=  16 cons:    SET
  188:d=4  hl=2 l=  14 cons:     SEQUENCE
  190:d=5  hl=2 l=   3 prim:      OBJECT :organizationalUnitName
  195:d=5  hl=2 l=   7 prim:      UTF8STRING        :Devices
  204:d=3  hl=2 l=  15 cons:    SET
  206:d=4  hl=2 l=  13 cons:     SEQUENCE
  208:d=5  hl=2 l=   3 prim:      OBJECT            :serialNumber
  213:d=5  hl=2 l=   6 prim:      PRINTABLESTRING   :Wt1234
  221:d=2  hl=2 l=  89 cons:   SEQUENCE
  223:d=3  hl=2 l=  19 cons:    SEQUENCE
  225:d=4  hl=2 l=   7 prim:     OBJECT            :id-ecPublicKey
  234:d=4  hl=2 l=   8 prim:     OBJECT            :prime256v1
  244:d=3  hl=2 l=  66 prim:    BIT STRING
  312:d=2  hl=3 l= 214 cons:   cont [ 3 ]
  315:d=3  hl=3 l= 211 cons:    SEQUENCE
  318:d=4  hl=2 l=   9 cons:     SEQUENCE
  320:d=5  hl=2 l=   3 prim:      OBJECT            :X509v3 Basic Constraints
  325:d=5  hl=2 l=   2 prim:      OCTET STRING      [HEX DUMP]:3000
  329:d=4  hl=3 l= 137 cons:     SEQUENCE
  332:d=5  hl=2 l=   3 prim:      OBJECT            :X509v3 Authority Key Identifier   337:d=5  hl=3 l= 129 prim:      OCTET STRING      [HEX DUMP]:307F801426FD85A51AA97FB4D79D39C684CC7C78D14AFF82A15CA45A3058310B3009060355040613025553310B300906035504080C024D493111300F06035504070C084F616B205061726B31173015060355040A0C0E48545420436F6E73756C74696E673110300E06035504030C07526F6F74204341820900F261D50250A6CEAA
  469:d=4  hl=2 l=  14 cons:     SEQUENCE
  471:d=5  hl=2 l=   3 prim:      OBJECT            :X509v3 Key Usage
  476:d=5  hl=2 l=   1 prim:      BOOLEAN           :255
  479:d=5  hl=2 l=   4 prim:      OCTET STRING      [HEX DUMP]:030205A0
  485:d=4  hl=2 l=  42 cons:     SEQUENCE
  487:d=5  hl=2 l=   3 prim:      OBJECT            :X509v3 Subject Alternative Name   492:d=5  hl=2 l=  35 prim:      OCTET STRING      [HEX DUMP]:3021A01F06082B06010505070804A013301106092B06010401B43B0A01040401020304
  529:d=1  hl=2 l=  10 cons:  SEQUENCE
  531:d=2  hl=2 l=   8 prim:   OBJECT            :ecdsa-with-SHA256
  541:d=1  hl=2 l=  72 prim:  BIT STRING

openssl asn1parse -i -strparse 492 -in /home/rgm/data/ca/8021ARintermediate/certs/Wt1234.cert.pem
    0:d=0  hl=2 l=  33 cons: SEQUENCE
    2:d=1  hl=2 l=  31 cons:  cont [ 0 ]
    4:d=2  hl=2 l=   8 prim:   OBJECT            :1.3.6.1.5.5.7.8.4
   14:d=2  hl=2 l=  19 cons:   cont [ 0 ]
   16:d=3  hl=2 l=  17 cons:    SEQUENCE
   18:d=4  hl=2 l=   9 prim:     OBJECT :1.3.6.1.4.1.6715.10.1
   29:d=4  hl=2 l=   4 prim:     OCTET STRING      [HEX DUMP]:01020304

Bob

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