The class for SSL errors that are the result of problems with the cipher suite of key exchange during establishing the SSL connection.
comm
Instances of the condition class ssl-version-or-cipher-mismatch
are used when SSL connection fails because of failure to match a cipher between the sides or problems with the key exchange.
The underlying implementation (OpenSSL or Apple) establishes the connection and decides where to fail, so whether such a failure occurs (for example, because the DH parameters are too short) depends on the underlying implementaion and its version.
LispWorks® User Guide and Reference Manual - 18 Feb 2025 15:32:11