How to use org.apache.shindig.auth

 public String encodeToken(SecurityToken token) throws SecurityTokenException {
  if (! (token instanceof BlobCrypterSecurityToken)) {
   throw new SecurityTokenException("Can only encode BlogCrypterSecurityTokens");
  }

  BlobCrypterSecurityToken t = (BlobCrypterSecurityToken)token;

  try {
   return t.encrypt();
  } catch (BlobCrypterException e) {
   throw new SecurityTokenException(e);
  }
 }
}

public AnonymousSecurityToken(String container, Long moduleId, String appUrl) {
 setContainer(container).setModuleId(moduleId).setAppUrl(appUrl)
  .setOwnerId(ANONYMOUS_ID)
  .setViewerId(ANONYMOUS_ID)
  .setDomain("*")
  .setTrustedJson("");
}

 public static BlobCrypterSecurityToken fromToken(SecurityToken token) {
  BlobCrypterSecurityToken interpretedToken = new BlobCrypterSecurityToken(token.getContainer(),
    token.getDomain(), token.getActiveUrl(), null);
  interpretedToken
    .setAppId(token.getAppId())
    .setAppUrl(token.getAppUrl())
    .setExpiresAt(token.getExpiresAt())
    .setModuleId(token.getModuleId())
    .setOwnerId(token.getOwnerId())
    .setTrustedJson(token.getTrustedJson())
    .setViewerId(token.getViewerId());

  return interpretedToken;
 }
}

public SecurityToken getSecurityTokenFromRequest(HttpServletRequest request)
  throws InvalidAuthenticationException {
 Map<String, String> parameters = getMappedParameters(request);
 try {
  if (parameters.get(SecurityTokenCodec.SECURITY_TOKEN_NAME) == null) {
   return null;
  }
  return securityTokenCodec.createToken(parameters);
 } catch (SecurityTokenException e) {
  throw new InvalidAuthenticationException("Malformed security token " +
    parameters.get(SecurityTokenCodec.SECURITY_TOKEN_NAME), e);
 }
}

 public String encodeToken(SecurityToken token) throws SecurityTokenException {
  if (token == null) {
   return null;
  }
  return codec.encodeToken(token);
 }
}

/**
 * Get the security token for this request.
 *
 * @return The security token
 */
public SecurityToken getSecurityToken() {
 return AuthInfoUtil.getSecurityTokenFromRequest(req);
}

/**
 * A helper to help load known supported keys from a provided map.
 *
 * @param map The map of values.
 * @see #getMapKeys()
 * @see #toMap()
 */
protected AbstractSecurityToken loadFromMap(Map<String, String> map) {
 for (Keys key : getMapKeys()) {
  key.loadFromMap(this, map);
 }
 return this;
}

/**
 * Set the auth type for the request.
 *
 * @param authType The named auth type
 * @return This object
 */
AuthInfo setAuthType(String authType) {
 setRequestAttribute(req, Attribute.AUTH_TYPE, authType);
 return this;
}

/**
 * Set the security token for the request.
 *
 * @param req The request object
 * @param token The security token
 */
public static void setSecurityTokenForRequest(HttpServletRequest req, SecurityToken token) {
 setRequestAttribute(req, Attribute.SECURITY_TOKEN, token);
}

/**
 * Compute and set the expiration time for this token using the default TTL.
 *
 * @return This security token.
 * @see #setExpires(int)
 */
protected AbstractSecurityToken setExpires() {
 return setExpires(DEFAULT_MAX_TOKEN_TTL);
}

 public static BlobCrypterSecurityToken fromToken(SecurityToken token) {
  BlobCrypterSecurityToken interpretedToken = new BlobCrypterSecurityToken(token.getContainer(),
    token.getDomain(), token.getActiveUrl(), null);
  interpretedToken
    .setAppId(token.getAppId())
    .setAppUrl(token.getAppUrl())
    .setExpiresAt(token.getExpiresAt())
    .setModuleId(token.getModuleId())
    .setOwnerId(token.getOwnerId())
    .setTrustedJson(token.getTrustedJson())
    .setViewerId(token.getViewerId());

  return interpretedToken;
 }
}

public AnonymousSecurityToken(String container, Long moduleId, String appUrl) {
 setContainer(container).setModuleId(moduleId).setAppUrl(appUrl)
  .setOwnerId(ANONYMOUS_ID)
  .setViewerId(ANONYMOUS_ID)
  .setDomain("*")
  .setTrustedJson("");
}

 public String encodeToken(SecurityToken token) throws SecurityTokenException {
  if (! (token instanceof BlobCrypterSecurityToken)) {
   throw new SecurityTokenException("Can only encode BlogCrypterSecurityTokens");
  }

  BlobCrypterSecurityToken t = (BlobCrypterSecurityToken)token;

  try {
   return t.encrypt();
  } catch (BlobCrypterException e) {
   throw new SecurityTokenException(e);
  }
 }
}

/**
 * A helper to help load known supported keys from a provided map.
 *
 * @param map The map of values.
 * @see #getMapKeys()
 * @see #toMap()
 */
protected AbstractSecurityToken loadFromMap(Map<String, String> map) {
 for (Keys key : getMapKeys()) {
  key.loadFromMap(this, map);
 }
 return this;
}

/**
 * Set the security token for the request.
 *
 * @param token The security token
 * @return This object
 */
AuthInfo setSecurityToken(SecurityToken token) {
 setRequestAttribute(req, Attribute.SECURITY_TOKEN, token);
 return this;
}

/**
 * Set the auth type for the request.
 *
 * @param req The request object
 * @param authType The named auth type
 */
public static void setAuthTypeForRequest(HttpServletRequest req, String authType) {
 setRequestAttribute(req, Attribute.AUTH_TYPE, authType);
}

 public static BlobCrypterSecurityToken fromToken(SecurityToken token) {
  BlobCrypterSecurityToken interpretedToken = new BlobCrypterSecurityToken(token.getContainer(),
    token.getDomain(), token.getActiveUrl(), null);
  interpretedToken
    .setAppId(token.getAppId())
    .setAppUrl(token.getAppUrl())
    .setExpiresAt(token.getExpiresAt())
    .setModuleId(token.getModuleId())
    .setOwnerId(token.getOwnerId())
    .setTrustedJson(token.getTrustedJson())
    .setViewerId(token.getViewerId());

  return interpretedToken;
 }
}

public AnonymousSecurityToken(String container, Long moduleId, String appUrl) {
 setContainer(container).setModuleId(moduleId).setAppUrl(appUrl)
  .setOwnerId(ANONYMOUS_ID)
  .setViewerId(ANONYMOUS_ID)
  .setDomain("*")
  .setTrustedJson("");
}

/**
 * A helper to help load known supported keys from a provided map.
 *
 * @param map The map of values.
 * @see #getMapKeys()
 * @see #toMap()
 */
protected AbstractSecurityToken loadFromMap(Map<String, String> map) {
 for (Keys key : getMapKeys()) {
  key.loadFromMap(this, map);
 }
 return this;
}

/**
 * Set the auth type for the request.
 *
 * @param authType The named auth type
 * @return This object
 */
AuthInfo setAuthType(String authType) {
 setRequestAttribute(req, Attribute.AUTH_TYPE, authType);
 return this;
}