Test your certificate chain using s_server and s_client

Add the CN value of the server certificate to your hosts file.

echo "$(hostname -I) digicert.pqc" | sudo tee -a /etc/hosts

Next, make sure you're in the /app/digicert-pqc/certs directory.

cd /app/digicert-pqc/certs

In one of your open terminals, start the server.

/app/digicert-pqc/pqpki-openssl-1.0.2r/bin/openssl s_server -engine IQREngine -cert dilithium_ecdsa_x509_catalyst_mixed_chain_intermediate_certificate.pem -certform PEM -key dilithium_catalyst_mixed_chain_intermediate_private_key.pem -keyform PEM -debug -tls1_2

You should see this output:

engine "IQREngine" set.
Using default temp DH parameters
ACCEPT

Switch to the second terminal window. Make sure you're in the /app/digicert-pqc/certs directory.

cd /app/digicert-pqc/certs

Use the s_client utility to connect to the running server.

/app/digicert-pqc/pqpki-openssl-1.0.2r/bin/openssl s_client -engine IQREngine -CAfile xmss_ecdsa_x509_catalyst_mixed_chain_root_certificate.pem -showcerts -tls1_2 -cipher 'ECDHE-NHDH-DILM-AES256-GCM-SHA384'

If everything is configured properly, in the terminal window running the s_client utility, you should see this output:

engine "IQREngine" set.
CONNECTED(00000003)
depth=1 C = US, ST = Utah, L = Lehi, O = "DigiCert, Inc.", OU = DigiCert PQC, CN = DigiCert PQC Root
verify return:1
depth=0 C = US, ST = Utah, L = Lehi, O = "DigiCert, Inc.", OU = DigiCert PQC, CN = DigiCert PQC Test Intermediate CA
verify return:1
---
Certificate chain
 0 s:/C=US/ST=Utah/L=Lehi/O=DigiCert, Inc./OU=DigiCert PQC/CN=DigiCert PQC Test Intermediate CA
   i:/C=US/ST=Utah/L=Lehi/O=DigiCert, Inc./OU=DigiCert PQC/CN=DigiCert PQC Root
-----BEGIN CERTIFICATE-----
[...]
-----END CERTIFICATE-----
---
Server certificate
subject=/C=US/ST=Utah/L=Lehi/O=DigiCert, Inc./OU=DigiCert PQC/CN=DigiCert PQC Test Intermediate CA
issuer=/C=US/ST=Utah/L=Lehi/O=DigiCert, Inc./OU=DigiCert PQC/CN=DigiCert PQC Root
---
No client certificate CA names sent
Peer signing digest: SHA512
Server Temp Key: ECDH, P-256, 256 bits
---
SSL handshake has read 9868 bytes and written 2331 bytes
---
New, TLSv1/SSLv3, Cipher is ECDHE-NHDH-DILM-AES256-GCM-SHA384
Server public key is 521 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : ECDHE-NHDH-DILM-AES256-GCM-SHA384
    Session-ID: {{Session-ID}}
    Session-ID-ctx: 
    Master-Key: {{Master-Key}}
    Key-Arg   : None
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    TLS session ticket lifetime hint: 7200 (seconds)
    TLS session ticket:
    [...]


    Start Time: 1563994600
    Timeout   : 7200 (sec)
    Verify return code: 0 (ok)
---

In the terminal window running the s_server utility, you should see this output:

read from 0x5581e0750b80 [0x5581e07656f3] (5 bytes => 5 (0x5))
0000 - 16 03 01 00 96                                    .....
read from 0x5581e0750b80 [0x5581e07656f8] (150 bytes => 150 (0x96))
0000 - 01 00 00 92 03 03 d9 c0-5a 73 35 d0 4e f2 31 f6   ........Zs5.N.1.
[...]
write to 0x5581e0750b80 [0x5581e076e100] (71 bytes => 71 (0x47))
0000 - 16 03 03 00 42 02 00 00-3e 03 03 c2 3b df 2f 01   ....B...>...;./.
[...]
write to 0x5581e0750b80 [0x5581e0769c43] (4953 bytes => 4953 (0x1359))
0000 - 16 03 03 13 54 0b 00 13-50 00 13 4d 00 13 4a 30   ....T...P..M..J0
[...]
write to 0x5581e0750b80 [0x5581e0769c43] (4609 bytes => 4609 (0x1201))
0000 - 16 03 03 11 fc 0c 00 11-f8 03 00 17 41 04 0d 97   ............A...
[...]
write to 0x5581e0750b80 [0x5581e076e100] (9 bytes => 9 (0x9))
0000 - 16 03 03 00 04 0e 00 00-00                        .........
read from 0x5581e0750b80 [0x5581e07656f3] (5 bytes => 5 (0x5))
0000 - 16 03 03 08 48                                    ....H
read from 0x5581e0750b80 [0x5581e07656f8] (2120 bytes => 2120 (0x848))
0000 - 10 00 08 44 41 04 29 0a-07 84 0c f3 a4 e4 3e d1   ...DA.).......>.
[...]
read from 0x5581e0750b80 [0x5581e07656f3] (5 bytes => 5 (0x5))
0000 - 14 03 03 00 01                                    .....
read from 0x5581e0750b80 [0x5581e07656f8] (1 bytes => 1 (0x1))
0000 - 01                                                .
read from 0x5581e0750b80 [0x5581e07656f3] (5 bytes => 5 (0x5))
0000 - 16 03 03 00 28                                    ....(
read from 0x5581e0750b80 [0x5581e07656f8] (40 bytes => 40 (0x28))
0000 - e1 d7 30 8b 12 ef d1 dc-31 90 97 d0 0e 54 9c aa   ..0.....1....T..
[...]
write to 0x5581e0750b80 [0x5581e076e100] (175 bytes => 175 (0xAF))
0000 - 16 03 03 00 aa 04 00 00-a6 00 00 1c 20 00 a0 02   ............ ...
[...]
write to 0x5581e0750b80 [0x5581e076e100] (6 bytes => 6 (0x6))
0000 - 14 03 03 00 01 01                                 ......
write to 0x5581e0750b80 [0x5581e076e100] (45 bytes => 45 (0x2D))
0000 - 16 03 03 00 28 d0 99 97-94 6d a1 5c f8 b0 c0 65   ....(....m.\...e
[...]
-----BEGIN SSL SESSION PARAMETERS-----
[...]
-----END SSL SESSION PARAMETERS-----
Shared ciphers:ECDHE-NHDH-DILM-AES256-GCM-SHA384:ECDHE-NHDH-SIDH-DILM-AES256-GCM-SHA384
Signature Algorithms: RSA+SHA512:DSA+SHA512:ECDSA+SHA512:RSA+SHA384:DSA+SHA384:ECDSA+SHA384:RSA+SHA256:DSA+SHA256:ECDSA+SHA256:RSA+SHA224:DSA+SHA224:ECDSA+SHA224:RSA+SHA1:DSA+SHA1:ECDSA+SHA1:HSS+SHA512:XMSS+SHA512:XMSSmt+SHA512:DILITHIUM+SHA512:DILITHIUM+SHA512:0xE0+SHA512
Shared Signature Algorithms: RSA+SHA512:DSA+SHA512:ECDSA+SHA512:RSA+SHA384:DSA+SHA384:ECDSA+SHA384:RSA+SHA256:DSA+SHA256:ECDSA+SHA256:RSA+SHA224:DSA+SHA224:ECDSA+SHA224:RSA+SHA1:DSA+SHA1:ECDSA+SHA1:HSS+SHA512:DILITHIUM+SHA512:DILITHIUM+SHA512
Supported Elliptic Curve Point Formats: uncompressed:ansiX962_compressed_prime:ansiX962_compressed_char2
Supported Elliptic Curves: P-256:P-521:brainpoolP512r1:brainpoolP384r1:P-384:brainpoolP256r1:secp256k1:B-571:K-571:K-409:B-409:K-283:B-283:0xFE01
Shared Elliptic curves: P-256:P-521:brainpoolP512r1:brainpoolP384r1:P-384:brainpoolP256r1:secp256k1:B-571:K-571:K-409:B-409:K-283:B-283:UNDEF
CIPHER is ECDHE-NHDH-DILM-AES256-GCM-SHA384
Secure Renegotiation IS supported