doc: add openssl command to fetch server fingerprint

This is not very pretty, but oh well.
2023-10-24 16:53:14 +02:00 · 2023-10-24 16:53:14 +02:00 · d85424fe01
commit d85424fe01
parent 467f8cd187
1 changed files with 7 additions and 0 deletions
--- a/doc/soju.1.scd
+++ b/doc/soju.1.scd
@ -267,6 +267,13 @@ character.
 		certificates. The fingerprint format is SHA512. An empty string
 		removes any previous fingerprint.

+		The following command can be used to fetch the certificate fingerprint
+		of an IRC server:
+
+		```
+		openssl s_client -connect irc.example.org:6697 </dev/null 2>/dev/null | openssl x509 -fingerprint -sha512 -noout -in /dev/stdin
+		```
+
 	*-nick* <nickname>
 		Connect with the specified nickname. By default, the account's username
 		is used.