Remove the authenticate token method from TokenManager and from the Subject interface

plugins/identity-shiro/src/main/java/org/opensearch/identity/shiro/ShiroTokenManager.java

@@ -10,13 +10,11 @@
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.apache.shiro.SecurityUtils;
 import org.apache.shiro.authc.AuthenticationToken;
 import org.apache.shiro.authc.UsernamePasswordToken;
 import org.opensearch.common.Randomness;
 import org.opensearch.identity.IdentityService;
 import org.opensearch.identity.Subject;
-import org.opensearch.identity.noop.NoopSubject;
 import org.opensearch.identity.tokens.AuthToken;
 import org.opensearch.identity.tokens.BasicAuthToken;
 import org.opensearch.identity.tokens.OnBehalfOfClaims;
@@ -88,20 +86,6 @@ public AuthToken issueServiceAccountToken(String audience) {
         return token;
     }
 
-    @Override
-    public Subject authenticateToken(AuthToken authToken) {
-        return new NoopSubject();
-    }
-
-    public boolean validateToken(AuthToken token) {
-        if (token instanceof BasicAuthToken) {
-            final BasicAuthToken basicAuthToken = (BasicAuthToken) token;
-            return basicAuthToken.getUser().equals(SecurityUtils.getSubject().toString())
-                && basicAuthToken.getPassword().equals(shiroTokenPasswordMap.get(basicAuthToken));
-        }
-        return false;
-    }
-
     public String getTokenInfo(AuthToken token) {
         if (token instanceof BasicAuthToken) {
             final BasicAuthToken basicAuthToken = (BasicAuthToken) token;

plugins/identity-shiro/src/test/java/org/opensearch/identity/shiro/AuthTokenHandlerTests.java

@@ -100,11 +100,6 @@ public void testShouldFailGetTokenInfo() {
         assertThrows(UnsupportedAuthenticationToken.class, () -> shiroAuthTokenHandler.getTokenInfo(bearerAuthToken));
     }
 
-    public void testShouldFailValidateToken() {
-        final BearerAuthToken bearerAuthToken = new BearerAuthToken("header.payload.signature");
-        assertFalse(shiroAuthTokenHandler.validateToken(bearerAuthToken));
-    }
-
     public void testShoudPassMapLookupWithToken() {
         final BasicAuthToken authToken = new BasicAuthToken("Basic dGVzdDp0ZTpzdA==");
         shiroAuthTokenHandler.getShiroTokenPasswordMap().put(authToken, "te:st");

server/src/main/java/org/opensearch/identity/noop/NoopTokenManager.java

@@ -50,9 +50,4 @@ public String asAuthHeaderValue() {
             }
         };
     }
-
-    @Override
-    public Subject authenticateToken(AuthToken authToken) {
-        return null;
-    }
 }

server/src/main/java/org/opensearch/identity/tokens/TokenManager.java

@@ -30,11 +30,4 @@ public interface TokenManager {
      * @return a new auth token
      */
     public AuthToken issueServiceAccountToken(final String audience);
-
-    /**
-     * Authenticates a provided authToken
-     * @param authToken: The authToken to authenticate
-     * @return The authenticated subject
-     */
-    public Subject authenticateToken(AuthToken authToken);
 }