null check otr fingerprint before display

Daniel Gultsch created 10 years ago

Change summary

src/main/java/eu/siacs/conversations/utils/CryptoHelper.java | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

Detailed changes

src/main/java/eu/siacs/conversations/utils/CryptoHelper.java

@@ -91,7 +91,9 @@ public final class CryptoHelper {
 	}
 
 	public static String prettifyFingerprint(String fingerprint) {
-		if (fingerprint.length() < 40) {
+		if (fingerprint==null) {
+			return "";
+		} else if (fingerprint.length() < 40) {
 			return fingerprint;
 		}
 		StringBuilder builder = new StringBuilder(fingerprint);