In OpenSSL 3.5.0 the `list` command can be used to obtain a list of supported groups for TLS. The commit makes use of this command when $OPENSSL is OpenSSL 3.5.0 or later. This should be faster than testing curves one at a time.
This commit fixes a check where the Boolean variables $HAS_UDS and $HAS_UDS2 are checked for whether they are empty rather than for whether they are true.
Decryption is TLS 1.3 handshakes is very slow if the response is encrypted using ChaCha20 and the $OPENSSL enc command does not support ChaCha20. This commit mitigates that problem by using $OPENSSL2 for ChaCha20 decryption if such decryption is needed and $OPENSSL does not support it.
This commit also changes testssl.sh to make use of $OPENSSL2 for AES-GCM decryption, when $OPENSSL2 supports it, but $OPENSSL does not. However, this change is not as important. Implementing AES-GCM in Bash using $OPENSSL for AES ECB operations isn't nearly as slow as fully implementing ChaCha20 in Bash.
As a quick hack this PR enables *basically* the IPv6 proxy which results that testssl.sh
will use an IPv6 proxy when
* the binary supports that
* the binary is used an not tls_sockets()
* there's no A record but an AAAA record of the proxy or an IPv6 address as proxy address was specified.
The latter should guarantee that it doesn't break anything.
However tls_sockets() still uses IPv4 for the connection to the proxy.
See #1105
On MacOS `run_http_header()` hiccuped when in any place of the web site unprintable chars were returned, see https://github.com/testssl/testssl.sh/issues/2708#issuecomment-2738347784 .
This PR fixes that by moving the sanitization to a separate function and run it earlier before any processing of the returned content (header plus body) takes place.
Output was:
```
'HTTP Status Code awk: towc: multibyte conversion failure on: '� disabilitato");
input record number 36, file /tmp/testssl.FHu8E0/AAA.BBB.CCC.DDD.http_header.txt
source line number 1
'wk: towc: multibyte conversion failure on: '� disabilitato");
input record number 36, file /tmp/testssl.FHu8E0/AAA.BBB.CCC.DDD.http_header.txt
source line number 1
200 OK
```
