[openssl-users] How to display root certificate in command line

[Jerry OELoo]

Hi All:
I have used openssl command line to get some website's certificate
chain. Now, I want to show root certificate information. but I do not
find any command argument to do it.

openssl s_client -showcerts -CApath /etc/ssl/certs -connect
studentexclusives.hsbc.co.uk:443

I use -CApath to set root certificate path.

>From below, I can get full certificate path. 3 certificates

CONNECTED(00000003)
depth=2 C = US, O = "VeriSign, Inc.", OU = VeriSign Trust Network, OU
= "(c) 2006 VeriSign, Inc. - For authorized use only", CN = VeriSign
Class 3 Public Primary Certification Authority - G5
verify return:1
depth=1 C = US, O = "VeriSign, Inc.", OU = VeriSign Trust Network, OU
= Terms of use at https://www.verisign.com/rpa (c)10, CN = VeriSign
Class 3 Secure Server CA - G3
verify return:1
depth=0 C = GB, ST = London, L = London, O = HSBC Holdings plc, OU =
HTSE, CN = studentexclusives.hsbc.co.uk
verify return:1


But in certificate chain, I only get 2 certificates information (I
think this two are return by website.)

---
Certificate chain
 0 s:/C=GB/ST=London/L=London/O=HSBC Holdings
plc/OU=HTSE/CN=studentexclusives.hsbc.co.uk
   i:/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=Terms of use
at https://www.verisign.com/rpa (c)10/CN=VeriSign Class 3 Secure
Server CA - G3
-----BEGIN CERTIFICATE-----
MIIFUDCCBDigAwIBAgIQTw4Fx5Xv3tBjt8gNVOKAjjANBgkqhkiG9w0BAQUFADCB
tTELMAkGA1UEBhMCVVMxFzAVBgNVBAoTDlZlcmlTaWduLCBJbmMuMR8wHQYDVQQL
ExZWZXJpU2lnbiBUcnVzdCBOZXR3b3JrMTswOQYDVQQLEzJUZXJtcyBvZiB1c2Ug
YXQgaHR0cHM6Ly93d3cudmVyaXNpZ24uY29tL3JwYSAoYykxMDEvMC0GA1UEAxMm
VmVyaVNpZ24gQ2xhc3MgMyBTZWN1cmUgU2VydmVyIENBIC0gRzMwHhcNMTMwODA2
MDAwMDAwWhcNMTUwODA3MjM1OTU5WjCBgTELMAkGA1UEBhMCR0IxDzANBgNVBAgT
BkxvbmRvbjEPMA0GA1UEBxQGTG9uZG9uMRowGAYDVQQKFBFIU0JDIEhvbGRpbmdz
IHBsYzENMAsGA1UECxQESFRTRTElMCMGA1UEAxQcc3R1ZGVudGV4Y2x1c2l2ZXMu
aHNiYy5jby51azCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAOpGrR8P
hBbnPeewbha7UitdVHL+Zk7HCQ9Hi67+1GI8HgX+eMRk2w/LHL7gYSNr9ZelIPap
ZfTDwBnHyUUH3SAf5ajg5vVFtROCYr9LLFXEW/97Qy6Anh1efJo15eoBXUYVYhBW
IMjU6sO9T+kRBMgxoqtVM4WVmy4pN3NqHqF/8D4k+Y+fcBt2Nm3D/YwI+4H7Bt+P
ap5oj5uALFdcr+dbO76FomAAJ3vjTw10lBCCdfnKmOjBayAVoz/qz91Fy1BYY9jA
l9p1EXml1bYSPJaxfejiyKjHni64cBAMtHyhknlJYDs47mnyp5FLpg3nmxtGCNMR
jXPtxRLDrFMAuGsCAwEAAaOCAYwwggGIMCcGA1UdEQQgMB6CHHN0dWRlbnRleGNs
dXNpdmVzLmhzYmMuY28udWswCQYDVR0TBAIwADAOBgNVHQ8BAf8EBAMCBaAwHQYD
VR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMEMGA1UdIAQ8MDowOAYKYIZIAYb4
RQEHNjAqMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy52ZXJpc2lnbi5jb20vY3Bz
MB8GA1UdIwQYMBaAFA1EXBZTRMGCfh0gqyX0AWPYvnmlMEUGA1UdHwQ+MDwwOqA4
oDaGNGh0dHA6Ly9TVlJTZWN1cmUtRzMtY3JsLnZlcmlzaWduLmNvbS9TVlJTZWN1
cmVHMy5jcmwwdgYIKwYBBQUHAQEEajBoMCQGCCsGAQUFBzABhhhodHRwOi8vb2Nz
cC52ZXJpc2lnbi5jb20wQAYIKwYBBQUHMAKGNGh0dHA6Ly9TVlJTZWN1cmUtRzMt
YWlhLnZlcmlzaWduLmNvbS9TVlJTZWN1cmVHMy5jZXIwDQYJKoZIhvcNAQEFBQAD
ggEBAFVoAhJ7Xv0hcv7fkR/mLE+OVhzgkwhTcANZmAuEQwo3ZwHICXg3p/ZjuRe6
4EV1CqSq1RwswG2GtOHFZ+CaC9Fi3lIDVRzaudLkYCF7mtLZls7DF3/HsoJ6muYX
P0X3IsQ6hnc6a3ChdyN+IJymW/KRRUtHKmA/BQS8hOGpdmxvZIdgIkrHoAO3EXfk
SkESma7BMDeW0DOeGuDhUrvn2N6UdyWSA2cdk6d4fQxWawqOiUtYT+o2oX3imDrg
cDKU9HB3eqd0K5nwDFIFlbsZHs6gIGJVJeGVuk07Px5ucOZBFc/UMBBRI3bm2HW4
sjn3tNB8AITr3v3+Evf4vMnbaIs=
-----END CERTIFICATE-----
 1 s:/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=Terms of use
at https://www.verisign.com/rpa (c)10/CN=VeriSign Class 3 Secure
Server CA - G3
   i:/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=(c) 2006
VeriSign, Inc. - For authorized use only/CN=VeriSign Class 3 Public
Primary Certification Authority - G5
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
---

Now I want to also display root certificate "VeriSign Class 3 Public
Primary Certification Authority - G5" information, How can I show it?

Thanks!

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