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Fix ecdh-curve X25519 missing when using the defaults.

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In config.h we had a:
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
 #define UNREALIRCD_DEFAULT_ECDH_CURVES "X25519:secp521r1:secp384r1:prime256v1"
 #else
 #define UNREALIRCD_DEFAULT_ECDH_CURVES "secp521r1:secp384r1:prime256v1"
 #endif
...which is fine in theory, but openssl headers are not included at that point,
so OPENSSL_VERSION_NUMBER was not defined.

From now on, we have:
 #define UNREALIRCD_DEFAULT_ECDH_CURVES_PRIMARY "X25519:secp521r1:secp384r1:prime256v1"
 #define UNREALIRCD_DEFAULT_ECDH_CURVES_SECONDARY "secp521r1:secp384r1:prime256v1"
...and we try them in that order. If both fail, we exit with an error (like before).
This because X25519 is not available in OpenSSL before 1.1.0 (so really old)
and may also not be available when running in FIPS mode.
This commit is contained in:
Bram Matthys
2024-11-17 11:53:49 +01:00
parent 116e076f0d
commit cda2bcd930
4 changed files with 39 additions and 15 deletions
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src/conf.c
-3
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@@ -1792,9 +1792,6 @@ void config_setdefaultsettings(Configuration *i)
safe_strdup(i->tls_options->ciphers, UNREALIRCD_DEFAULT_CIPHERS);
safe_strdup(i->tls_options->ciphersuites, UNREALIRCD_DEFAULT_CIPHERSUITES);
i->tls_options->protocols = TLS_PROTOCOL_TLSV1_2|TLS_PROTOCOL_TLSV1_3; /* TLSv1.2 & TLSv1.3 */
#ifdef HAS_SSL_CTX_SET1_CURVES_LIST
safe_strdup(i->tls_options->ecdh_curves, UNREALIRCD_DEFAULT_ECDH_CURVES);
#endif
safe_strdup(i->tls_options->outdated_protocols, "TLSv1,TLSv1.1");
/* the following may look strange but "AES*" matches all
* AES ciphersuites that do not have Forward Secrecy.