Masui Masanori

Posted on Nov 9, 2022 • Updated on Nov 18, 2022

[Nginx] Configuration about TLS

#nginx

Intro

This time, I will try Nginx configuration about TLS.

Environments

Ubuntu ver.22.04.1 LTS
Nginx ver.1.22.1
OpenSSL ver.3.0.2 15 Mar 2022

Cipher suites

To connect using TLS, the server and client need to agree on whitch cipher suite to use.

webrtcapp.conf

...
server {
    listen 4444 ssl http2;
    server_name localhost;
    proxy_buffering off;
    proxy_cache off;
    proxy_set_header Connection '';
    proxy_http_version 1.1;
    proxy_read_timeout 24h;
    chunked_transfer_encoding off;

    # default values
    #ssl_ciphers 'HIGH:!aNULL:!MD5';
    #ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    #ssl_prefer_server_ciphers off;

    ssl_certificate /home/example/local_cert.pem;
    ssl_certificate_key /home/example/local_key.pem;
    location / {
...
        proxy_pass http://localhost:8080;
    }
}

Default ciphers

I can use "openssl ciphers -v 'HIGH:!aNULL:!MD5'" to see what cipher suites are selected.

TLS_AES_256_GCM_SHA384         TLSv1.3 Kx=any      Au=any   Enc=AESGCM(256)            Mac=AEAD
TLS_CHACHA20_POLY1305_SHA256   TLSv1.3 Kx=any      Au=any   Enc=CHACHA20/POLY1305(256) Mac=AEAD
TLS_AES_128_GCM_SHA256         TLSv1.3 Kx=any      Au=any   Enc=AESGCM(128)            Mac=AEAD
ECDHE-ECDSA-AES256-GCM-SHA384  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256)            Mac=AEAD
ECDHE-RSA-AES256-GCM-SHA384    TLSv1.2 Kx=ECDH     Au=RSA   Enc=AESGCM(256)            Mac=AEAD
DHE-DSS-AES256-GCM-SHA384      TLSv1.2 Kx=DH       Au=DSS   Enc=AESGCM(256)            Mac=AEAD
DHE-RSA-AES256-GCM-SHA384      TLSv1.2 Kx=DH       Au=RSA   Enc=AESGCM(256)            Mac=AEAD
ECDHE-ECDSA-CHACHA20-POLY1305  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
ECDHE-RSA-CHACHA20-POLY1305    TLSv1.2 Kx=ECDH     Au=RSA   Enc=CHACHA20/POLY1305(256) Mac=AEAD
DHE-RSA-CHACHA20-POLY1305      TLSv1.2 Kx=DH       Au=RSA   Enc=CHACHA20/POLY1305(256) Mac=AEAD
ECDHE-ECDSA-AES256-CCM8        TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESCCM8(256)           Mac=AEAD
ECDHE-ECDSA-AES256-CCM         TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESCCM(256)            Mac=AEAD
DHE-RSA-AES256-CCM8            TLSv1.2 Kx=DH       Au=RSA   Enc=AESCCM8(256)           Mac=AEAD
DHE-RSA-AES256-CCM             TLSv1.2 Kx=DH       Au=RSA   Enc=AESCCM(256)            Mac=AEAD
ECDHE-ECDSA-ARIA256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=ARIAGCM(256)           Mac=AEAD
ECDHE-ARIA256-GCM-SHA384       TLSv1.2 Kx=ECDH     Au=RSA   Enc=ARIAGCM(256)           Mac=AEAD
DHE-DSS-ARIA256-GCM-SHA384     TLSv1.2 Kx=DH       Au=DSS   Enc=ARIAGCM(256)           Mac=AEAD
DHE-RSA-ARIA256-GCM-SHA384     TLSv1.2 Kx=DH       Au=RSA   Enc=ARIAGCM(256)           Mac=AEAD
ECDHE-ECDSA-AES128-GCM-SHA256  TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128)            Mac=AEAD
ECDHE-RSA-AES128-GCM-SHA256    TLSv1.2 Kx=ECDH     Au=RSA   Enc=AESGCM(128)            Mac=AEAD
DHE-DSS-AES128-GCM-SHA256      TLSv1.2 Kx=DH       Au=DSS   Enc=AESGCM(128)            Mac=AEAD
DHE-RSA-AES128-GCM-SHA256      TLSv1.2 Kx=DH       Au=RSA   Enc=AESGCM(128)            Mac=AEAD
ECDHE-ECDSA-AES128-CCM8        TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESCCM8(128)           Mac=AEAD
ECDHE-ECDSA-AES128-CCM         TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESCCM(128)            Mac=AEAD
DHE-RSA-AES128-CCM8            TLSv1.2 Kx=DH       Au=RSA   Enc=AESCCM8(128)           Mac=AEAD
DHE-RSA-AES128-CCM             TLSv1.2 Kx=DH       Au=RSA   Enc=AESCCM(128)            Mac=AEAD
ECDHE-ECDSA-ARIA128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=ARIAGCM(128)           Mac=AEAD
ECDHE-ARIA128-GCM-SHA256       TLSv1.2 Kx=ECDH     Au=RSA   Enc=ARIAGCM(128)           Mac=AEAD
DHE-DSS-ARIA128-GCM-SHA256     TLSv1.2 Kx=DH       Au=DSS   Enc=ARIAGCM(128)           Mac=AEAD
DHE-RSA-ARIA128-GCM-SHA256     TLSv1.2 Kx=DH       Au=RSA   Enc=ARIAGCM(128)           Mac=AEAD
ECDHE-ECDSA-AES256-SHA384      TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(256)               Mac=SHA384
ECDHE-RSA-AES256-SHA384        TLSv1.2 Kx=ECDH     Au=RSA   Enc=AES(256)               Mac=SHA384
DHE-RSA-AES256-SHA256          TLSv1.2 Kx=DH       Au=RSA   Enc=AES(256)               Mac=SHA256
DHE-DSS-AES256-SHA256          TLSv1.2 Kx=DH       Au=DSS   Enc=AES(256)               Mac=SHA256
ECDHE-ECDSA-CAMELLIA256-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=Camellia(256)          Mac=SHA384
ECDHE-RSA-CAMELLIA256-SHA384   TLSv1.2 Kx=ECDH     Au=RSA   Enc=Camellia(256)          Mac=SHA384
DHE-RSA-CAMELLIA256-SHA256     TLSv1.2 Kx=DH       Au=RSA   Enc=Camellia(256)          Mac=SHA256
DHE-DSS-CAMELLIA256-SHA256     TLSv1.2 Kx=DH       Au=DSS   Enc=Camellia(256)          Mac=SHA256
ECDHE-ECDSA-AES128-SHA256      TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AES(128)               Mac=SHA256
ECDHE-RSA-AES128-SHA256        TLSv1.2 Kx=ECDH     Au=RSA   Enc=AES(128)               Mac=SHA256
DHE-RSA-AES128-SHA256          TLSv1.2 Kx=DH       Au=RSA   Enc=AES(128)               Mac=SHA256
DHE-DSS-AES128-SHA256          TLSv1.2 Kx=DH       Au=DSS   Enc=AES(128)               Mac=SHA256
ECDHE-ECDSA-CAMELLIA128-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=Camellia(128)          Mac=SHA256
ECDHE-RSA-CAMELLIA128-SHA256   TLSv1.2 Kx=ECDH     Au=RSA   Enc=Camellia(128)          Mac=SHA256
DHE-RSA-CAMELLIA128-SHA256     TLSv1.2 Kx=DH       Au=RSA   Enc=Camellia(128)          Mac=SHA256
DHE-DSS-CAMELLIA128-SHA256     TLSv1.2 Kx=DH       Au=DSS   Enc=Camellia(128)          Mac=SHA256
...
RSA-PSK-AES256-GCM-SHA384      TLSv1.2 Kx=RSAPSK   Au=RSA   Enc=AESGCM(256)            Mac=AEAD
DHE-PSK-AES256-GCM-SHA384      TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=AESGCM(256)            Mac=AEAD
RSA-PSK-CHACHA20-POLY1305      TLSv1.2 Kx=RSAPSK   Au=RSA   Enc=CHACHA20/POLY1305(256) Mac=AEAD
DHE-PSK-CHACHA20-POLY1305      TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=CHACHA20/POLY1305(256) Mac=AEAD
ECDHE-PSK-CHACHA20-POLY1305    TLSv1.2 Kx=ECDHEPSK Au=PSK   Enc=CHACHA20/POLY1305(256) Mac=AEAD
DHE-PSK-AES256-CCM8            TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=AESCCM8(256)           Mac=AEAD
DHE-PSK-AES256-CCM             TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=AESCCM(256)            Mac=AEAD
RSA-PSK-ARIA256-GCM-SHA384     TLSv1.2 Kx=RSAPSK   Au=RSA   Enc=ARIAGCM(256)           Mac=AEAD
DHE-PSK-ARIA256-GCM-SHA384     TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=ARIAGCM(256)           Mac=AEAD
AES256-GCM-SHA384              TLSv1.2 Kx=RSA      Au=RSA   Enc=AESGCM(256)            Mac=AEAD
AES256-CCM8                    TLSv1.2 Kx=RSA      Au=RSA   Enc=AESCCM8(256)           Mac=AEAD
AES256-CCM                     TLSv1.2 Kx=RSA      Au=RSA   Enc=AESCCM(256)            Mac=AEAD
ARIA256-GCM-SHA384             TLSv1.2 Kx=RSA      Au=RSA   Enc=ARIAGCM(256)           Mac=AEAD
PSK-AES256-GCM-SHA384          TLSv1.2 Kx=PSK      Au=PSK   Enc=AESGCM(256)            Mac=AEAD
PSK-CHACHA20-POLY1305          TLSv1.2 Kx=PSK      Au=PSK   Enc=CHACHA20/POLY1305(256) Mac=AEAD
PSK-AES256-CCM8                TLSv1.2 Kx=PSK      Au=PSK   Enc=AESCCM8(256)           Mac=AEAD
PSK-AES256-CCM                 TLSv1.2 Kx=PSK      Au=PSK   Enc=AESCCM(256)            Mac=AEAD
PSK-ARIA256-GCM-SHA384         TLSv1.2 Kx=PSK      Au=PSK   Enc=ARIAGCM(256)           Mac=AEAD
RSA-PSK-AES128-GCM-SHA256      TLSv1.2 Kx=RSAPSK   Au=RSA   Enc=AESGCM(128)            Mac=AEAD
DHE-PSK-AES128-GCM-SHA256      TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=AESGCM(128)            Mac=AEAD
DHE-PSK-AES128-CCM8            TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=AESCCM8(128)           Mac=AEAD
DHE-PSK-AES128-CCM             TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=AESCCM(128)            Mac=AEAD
RSA-PSK-ARIA128-GCM-SHA256     TLSv1.2 Kx=RSAPSK   Au=RSA   Enc=ARIAGCM(128)           Mac=AEAD
DHE-PSK-ARIA128-GCM-SHA256     TLSv1.2 Kx=DHEPSK   Au=PSK   Enc=ARIAGCM(128)           Mac=AEAD
AES128-GCM-SHA256              TLSv1.2 Kx=RSA      Au=RSA   Enc=AESGCM(128)            Mac=AEAD
AES128-CCM8                    TLSv1.2 Kx=RSA      Au=RSA   Enc=AESCCM8(128)           Mac=AEAD
AES128-CCM                     TLSv1.2 Kx=RSA      Au=RSA   Enc=AESCCM(128)            Mac=AEAD
ARIA128-GCM-SHA256             TLSv1.2 Kx=RSA      Au=RSA   Enc=ARIAGCM(128)           Mac=AEAD
PSK-AES128-GCM-SHA256          TLSv1.2 Kx=PSK      Au=PSK   Enc=AESGCM(128)            Mac=AEAD
PSK-AES128-CCM8                TLSv1.2 Kx=PSK      Au=PSK   Enc=AESCCM8(128)           Mac=AEAD
PSK-AES128-CCM                 TLSv1.2 Kx=PSK      Au=PSK   Enc=AESCCM(128)            Mac=AEAD
PSK-ARIA128-GCM-SHA256         TLSv1.2 Kx=PSK      Au=PSK   Enc=ARIAGCM(128)           Mac=AEAD
AES256-SHA256                  TLSv1.2 Kx=RSA      Au=RSA   Enc=AES(256)               Mac=SHA256
CAMELLIA256-SHA256             TLSv1.2 Kx=RSA      Au=RSA   Enc=Camellia(256)          Mac=SHA256
AES128-SHA256                  TLSv1.2 Kx=RSA      Au=RSA   Enc=AES(128)               Mac=SHA256
CAMELLIA128-SHA256             TLSv1.2 Kx=RSA      Au=RSA   Enc=Camellia(128)          Mac=SHA256
...

Use Generator

I can generate the configurations by SSL Configuration Generator.

SSL Configuration Generator - Mozilla

I will change the TLS configurations

webrtcapp.conf

...
server {
    listen 4444 ssl http2;
    server_name localhost;
    proxy_buffering off;
    proxy_cache off;
    proxy_set_header Connection '';
    proxy_http_version 1.1;
    proxy_read_timeout 24h;
    chunked_transfer_encoding off;

    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;

    ssl_certificate /home/example/local_cert.pem;
    ssl_certificate_key /home/example/local_key.pem;
    location / {
...
        proxy_pass http://localhost:8080;
    }
}

ssl_ciphers

All of the selected ciphers are for TLS ver.1.2.

ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;

How about the TLS ver.1.3?

According to the issue below, it seems that TLS ver.1.3 ciphers cannot be specified in Nginx's ssl_ciphers due to OpenSSL.

#1529(Could not configure TLS1.3 ciphers in OpenSSL 1.1.1 pre4) - nginx

DEV Community

[Nginx] Configuration about TLS

Intro

Environments

Cipher suites

webrtcapp.conf

Default ciphers

Use Generator

webrtcapp.conf

ssl_ciphers

Resources

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