Fix escaping in WildcardHostMatcher (#382)

* Escape '[' and ']' in WildcardHostMatcher

* Anchoring regex to match entire string (Fixes #381)

Author: hierynomus

src/main/java/com/hierynomus/sshj/transport/verification/KnownHostMatchers.java

@@ -135,7 +135,7 @@ private static class WildcardHostMatcher implements HostMatcher {
         private final Pattern pattern;
 
         public WildcardHostMatcher(String hostEntry) {
-            this.pattern = Pattern.compile(hostEntry.replace(".", "\\.").replace("*", ".*").replace("?", "."));
+            this.pattern = Pattern.compile("^" + hostEntry.replace("[", "\\[").replace("]", "\\]").replace(".", "\\.").replace("*", ".*").replace("?", ".") + "$");
         }
 
         @Override

src/main/java/net/schmizz/sshj/transport/verification/OpenSSHKnownHosts.java

@@ -360,7 +360,7 @@ private String getKeyString() {
         }
 
         protected String getHostPart() {
-            return  hostPart;
+            return hostPart;
         }
     }
 

src/test/groovy/com/hierynomus/sshj/transport/verification/KnownHostMatchersTest.groovy

@@ -49,6 +49,11 @@ class KnownHostMatchersSpec extends Specification {
         "aaa.b??.com" | "aaa.bccd.com" | false
         "|1|F1E1KeoE/eEWhi10WpGv4OdiO6Y=|3988QV0VE8wmZL7suNrYQLITLCg=" | "192.168.1.61" | true
         "|1|F1E1KeoE/eEWhi10WpGv4OdiO6Y=|3988QV0VE8wmZL7suNrYQLITLCg=" | "192.168.2.61" | false
+        "[aaa.bbb.com]:2222" | "aaa.bbb.com" | false
+        "[aaa.bbb.com]:2222" | "[aaa.bbb.com]:2222" | true
+        "[aaa.?bb.com]:2222" | "[aaa.dbb.com]:2222" | true
+        "[aaa.?xb.com]:2222" | "[aaa.dbb.com]:2222" | false
+        "[*.bbb.com]:2222" | "[aaa.bbb.com]:2222" | true
         yesno = match ? "" : "no"
     }
 }