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-rw-r--r--src/main/java/eu/siacs/conversations/utils/CryptoHelper.java4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/main/java/eu/siacs/conversations/utils/CryptoHelper.java b/src/main/java/eu/siacs/conversations/utils/CryptoHelper.java
index 466bc409..2dec203d 100644
--- a/src/main/java/eu/siacs/conversations/utils/CryptoHelper.java
+++ b/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);