Use SHA-256 hashes for fingerprinting.

[Sone.git] / src / main / java / net / pterodactylus / sone / data / Sone.java

diff --git a/src/main/java/net/pterodactylus/sone/data/Sone.java b/src/main/java/net/pterodactylus/sone/data/Sone.java
index a609982..a3e872b 100644 (file)
--- a/src/main/java/net/pterodactylus/sone/data/Sone.java
+++ b/src/main/java/net/pterodactylus/sone/data/Sone.java
@@ -38,6 +38,8 @@ import net.pterodactylus.sone.template.SoneAccessor;
 import net.pterodactylus.util.logging.Logging;
 
 import com.google.common.base.Predicate;
+import com.google.common.hash.Hasher;
+import com.google.common.hash.Hashing;
 
 import freenet.keys.FreenetURI;
 
@@ -915,46 +917,46 @@ public class Sone implements Fingerprintable, Comparable<Sone> {
         */
        @Override
        public synchronized String getFingerprint() {
-               StringBuilder fingerprint = new StringBuilder();
-               fingerprint.append(profile.getFingerprint());
+               Hasher hash = Hashing.sha256().newHasher();
+               hash.putString(profile.getFingerprint());
 
-               fingerprint.append("Posts(");
+               hash.putString("Posts(");
                for (Post post : getPosts()) {
-                       fingerprint.append("Post(").append(post.getId()).append(')');
+                       hash.putString("Post(").putString(post.getId()).putString(")");
                }
-               fingerprint.append(")");
+               hash.putString(")");
 
                List<PostReply> replies = new ArrayList<PostReply>(getReplies());
                Collections.sort(replies, Reply.TIME_COMPARATOR);
-               fingerprint.append("Replies(");
+               hash.putString("Replies(");
                for (PostReply reply : replies) {
-                       fingerprint.append("Reply(").append(reply.getId()).append(')');
+                       hash.putString("Reply(").putString(reply.getId()).putString(")");
                }
-               fingerprint.append(')');
+               hash.putString(")");
 
                List<String> likedPostIds = new ArrayList<String>(getLikedPostIds());
                Collections.sort(likedPostIds);
-               fingerprint.append("LikedPosts(");
+               hash.putString("LikedPosts(");
                for (String likedPostId : likedPostIds) {
-                       fingerprint.append("Post(").append(likedPostId).append(')');
+                       hash.putString("Post(").putString(likedPostId).putString(")");
                }
-               fingerprint.append(')');
+               hash.putString(")");
 
                List<String> likedReplyIds = new ArrayList<String>(getLikedReplyIds());
                Collections.sort(likedReplyIds);
-               fingerprint.append("LikedReplies(");
+               hash.putString("LikedReplies(");
                for (String likedReplyId : likedReplyIds) {
-                       fingerprint.append("Reply(").append(likedReplyId).append(')');
+                       hash.putString("Reply(").putString(likedReplyId).putString(")");
                }
-               fingerprint.append(')');
+               hash.putString(")");
 
-               fingerprint.append("Albums(");
+               hash.putString("Albums(");
                for (Album album : albums) {
-                       fingerprint.append(album.getFingerprint());
+                       hash.putString(album.getFingerprint());
                }
-               fingerprint.append(')');
+               hash.putString(")");
 
-               return fingerprint.toString();
+               return hash.hash().toString();
        }
 
        //