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use OpenSSL;

my $ssl = OpenSSL.new(:version(3), :client);
my $s = IO::Socket::INET.new(:$host, :port(443));
$ssl.set-socket($s);
$ssl.set-connect-state;
$ssl.connect
# $ssl.write, etc

use OpenSSL::RSATools;

my $pem = slurp 'key.pem';
my $rsa = OpenSSL::RSAKey.new(private-pem => $pem);
my $data = 'as df jk l';
my $signature = $rsa.sign($data.encode);
my $rsa = OpenSSL::RSAKey.new(public-pem => $public);
if $rsa.verify($data.encode, $signature) { ... }

use OpenSSL::CryptTools;

my $ciphertext = encrypt("asdf".encode,
                         :aes256,
                         :iv(("0" x 16).encode),
                         :key(('x' x 32).encode));
my $plaintext = decrypt($ciphertext,
                        :aes256,
                        :iv(("0" x 16).encode),
                        :key(('x' x 32).encode));

use OpenSSL::Digest;
my Blob $digest = md5("xyz".encode);

use OpenSSL::Digest::MD5;

my $md5 = OpenSSL::Digest::MD5.new; # Create fresh object
$md5.add('abc');                    # pass in Str or Blob
$md5.add('def');                    # Add some more data
my $digest = $md5.hash;             # Blob hash (and reset)
$md5.addfile('myfile');             # Read a file
my $hexdigest = $md5.hex;           # hex hash  (and reset)