Hashing the certificate authority file
From Cosign Wiki
Certificate authority certs are used by the filters to verify the identity of the weblogin server. OpenSSL looks up a hash value associated with the CA file and uses is to do said verification.
Unix and Unix-like systems
for cert in *.pem; do ln -s $cert `openssl x509 -in $cert -noout -hash`.0; done
From a command prompt, run:
openssl x509 -noout -hash -in \path\to\CAfileexample.pem
A hash value is displayed. Copy-and-paste the contents of the CAfileexample.pem file into a file called [hash value].0.
In your cosign.dll.config file have <CAFilePath> point to the folder where the hash is located. (Whereas pre-1.1.1 it would point directly to the file).