fixed Jwt signature base

src/main/java/org/mitre/jwt/Hmac256Signer.java

@@ -20,8 +20,12 @@ public class Hmac256Signer extends AbstractJwtSigner {
 		this(null);
 	}
 	
+	
 	public Hmac256Signer(byte[] passphrase) {
 		super(HS256);
+		
+		//TODO: set up a factory for other signature methods
+		
 		setPassphrase(passphrase);
 		
 		try {

src/main/java/org/mitre/jwt/Jwt.java

@@ -103,12 +103,15 @@ public class Jwt {
     }
 	
 	/**
-	 * Return the canonical encoded string of this JWT
+	 * Return the canonical encoded string of this JWT, the header in Base64, a period ".", the claims in Base64, a period ".", and the signature in Base64.
 	 */
 	public String toString() {
-		return getSignatureBase() + Strings.nullToEmpty(this.signature);
+		return getSignatureBase() + "." + Strings.nullToEmpty(this.signature);
 	}
 
+	/**
+	 * The signature base of a JWT is the header in Base64, a period ".", and the claims in Base64.
+	 */
 	public String getSignatureBase() {
 		JsonObject h = header.getAsJsonObject();
 		JsonObject c = claims.getAsJsonObject();
@@ -116,7 +119,7 @@ public class Jwt {
 		String h64 = new String(Base64.encodeBase64URLSafe(h.toString().getBytes()));
 		String c64 = new String(Base64.encodeBase64URLSafe(c.toString().getBytes()));
 		
-		return h64 + "." + c64 + ".";		
+		return h64 + "." + c64;		
 	}
 	
 
@@ -143,6 +146,8 @@ public class Jwt {
 		// shuttle for return value
 		Jwt jwt = new Jwt(new JwtHeader(hjo), new JwtClaims(cjo), s64);
 		
+		// TODO: save the wire-encoded string in the Jwt object itself?
+		
 		return jwt;
 		
 	}

src/test/java/org/mitre/jwt/JwtTest.java

@@ -69,8 +69,8 @@ public class JwtTest {
 		 * Expected signature: iGBPJj47S5q_HAhSoQqAdcS6A_1CFj3zrLaImqNbt9E
 		 *
 		 */
-		String signature = "iGBPJj47S5q_HAhSoQqAdcS6A_1CFj3zrLaImqNbt9E";
+		String signature = "p-63Jzz7mgi3H4hvW6MFB7lmPRZjhsL666MYkmpX33Y";
-		String expected = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjEzMDA4MTkzODAsImlzcyI6ImpvZSIsImh0dHA6Ly9leGFtcGxlLmNvbS9pc19yb290Ijp0cnVlfQ.iGBPJj47S5q_HAhSoQqAdcS6A_1CFj3zrLaImqNbt9E";
+		String expected = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjEzMDA4MTkzODAsImlzcyI6ImpvZSIsImh0dHA6Ly9leGFtcGxlLmNvbS9pc19yb290Ijp0cnVlfQ." + signature;
 		
 		String actual = jwt.toString();