Fixes an issue when verifying a message without expiration date.

src/main/java/io/dimeformat/Crypto.java

@@ -113,8 +113,6 @@ public static Key generateSharedSecret(Key clientKey, Key serverKey) throws Dime
         } else {
             throw new DimeKeyMismatchException("Invalid keys provided.");
         }
-        System.out.println("shared: " + Utility.toHex(shared));
-        System.out.println("---");
         return new Key(UUID.randomUUID(), KeyType.ENCRYPTION, shared, null);
     }
 

src/main/java/io/dimeformat/Message.java

@@ -160,6 +160,15 @@ public Message(UUID issuerId, long validFor) {
         this(null, issuerId, validFor, null);
     }
 
+    /**
+     * Creates a message to a specified audience (receiver) from a specified issuer (sender).
+     * @param audienceId The audience identifier. Providing -1 as validFor will skip setting an expiration date.
+     * @param issuerId The issuer identifier.
+     */
+    public Message(UUID audienceId, UUID issuerId) {
+        this(audienceId, issuerId, -1, null);
+    }
+
     /**
      * Creates a message to a specified audience (receiver) from a specified issuer (sender), with an expiration date.
      * @param audienceId The audience identifier. Providing -1 as validFor will skip setting an expiration date.
@@ -216,8 +225,10 @@ public void verify(Key key) throws DimeDateException, DimeIntegrityException {
         // Verify IssuedAt and ExpiresAt
         Instant now = Instant.now();
         if (this.getIssuedAt().compareTo(now) > 0) { throw new DimeDateException("Issuing date in the future."); }
-        if (this.getIssuedAt().compareTo(this.getExpiresAt()) > 0) { throw new DimeDateException("Expiration before issuing date."); }
-        if (this.getExpiresAt().compareTo(now) < 0) { throw new DimeDateException("Passed expiration date."); }
+        if (this.getExpiresAt() != null) {
+            if (this.getIssuedAt().compareTo(this.getExpiresAt()) > 0) { throw new DimeDateException("Expiration before issuing date."); }
+            if (this.getExpiresAt().compareTo(now) < 0) { throw new DimeDateException("Passed expiration date."); }
+        }
         super.verify(key);
     }
 

src/test/java/io/dimeformat/MessageTest.java

@@ -158,6 +158,19 @@ void verifyTest3() {
         }
     }
 
+    @Test
+    void verifyTest4() {
+        try {
+            Identity.setTrustedIdentity(Commons.getTrustedIdentity());
+            Message message = new Message(Commons.getAudienceIdentity().getSubjectId(), Commons.getIssuerIdentity().getSubjectId());
+            message.setPayload("Racecar is racecar backwards.".getBytes(StandardCharsets.UTF_8));
+            message.sign(Commons.getIssuerKey());
+            message.verify(Commons.getIssuerIdentity().getPublicKey());
+        } catch (Exception e) {
+            fail("Unexpected exception thrown: " + e);
+        }
+    }
+
     @Test
     void importTest1() { 
         try {