Merge branch 'bug2409' into maint-0.2.2

changes/bug2409

@@ -0,0 +1,4 @@
+  o Minor bugfixes
+    - Resolve a bug in verifying signatures of directory objects
+      with digests longer than SHA1.  Bugfix on 0.2.2.20-alpha;
+      fixes bug 2409; found by "piebeer".

src/or/routerparse.c

@@ -1088,7 +1088,7 @@ check_signature_token(const char *digest,
   signed_digest = tor_malloc(keysize);
   if (crypto_pk_public_checksig(pkey, signed_digest, keysize,
                                 tok->object_body, tok->object_size)
-      < DIGEST_LEN) {
+      < digest_len) {
     log_warn(LD_DIR, "Error reading %s: invalid signature.", doctype);
     tor_free(signed_digest);
     return -1;