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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

[scriptable, uuid(12f60021-e14b-4020-99d1-ed2c795be66a)]
interface nsINSSErrorsService : nsISupports
{
    /**
     *  @param aNSPRCode An error code obtained using PR_GetError()
     *  @return True if it is error code defined by the NSS library
     */
    [must_use]
    boolean isNSSErrorCode(in int32_t aNSPRCode);

    /**
     *  Function will fail if aNSPRCode is not an NSS error code.
     *  @param aNSPRCode An error code obtained using PR_GetError()
     *  @return The result of the conversion, an XPCOM error code
     */
    [must_use]
    nsresult getXPCOMFromNSSError(in int32_t aNSPRCode);

    /**
     *  Function will fail if aXPCOMErrorCode is not an NSS error code.
     *  @param aXPCOMErrorCode An error code obtained using getXPCOMFromNSSError
     *  return A localized human readable error explanation.
     */
    AString getErrorMessage(in nsresult aXPCOMErrorCode);

    /**
     *  Function will fail if aXPCOMErrorCode is not an NSS error code.
     *  @param aXPCOMErrorCode An error code obtained using getXPCOMFromNSSError
     *  return the error class of the code, either ERROR_CLASS_BAD_CERT
     *         or ERROR_CLASS_SSL_PROTOCOL
     */
    [must_use]
    uint32_t getErrorClass(in nsresult aXPCOMErrorCode);

    const unsigned long ERROR_CLASS_SSL_PROTOCOL = 1;
    const unsigned long ERROR_CLASS_BAD_CERT     = 2;

    /**
     *  The following values define the range of NSPR error codes used by NSS.
     *  NSS remains the authorative source for these numbers, as a result,
     *  the values might change in the future.
     *  The security module will perform a runtime check and assertion
     *  to ensure the values are in synch with NSS.
     */
    const long NSS_SEC_ERROR_BASE  = -(0x2000);
    const long NSS_SEC_ERROR_LIMIT = (NSS_SEC_ERROR_BASE + 1000);
    const long NSS_SSL_ERROR_BASE  = -(0x3000);
    const long NSS_SSL_ERROR_LIMIT = (NSS_SSL_ERROR_BASE + 1000);

    /**
     * The error codes within each module must fit in 16 bits. We want these
     * errors to fit in the same module as the NSS errors but not overlap with
     * any of them. Converting an NSS SEC, NSS SSL, or mozilla::pkix error to
     * an NS error involves negating the value of the error and then
     * synthesizing an error in the NS_ERROR_MODULE_SECURITY module. Hence,
     * mozilla::pkix errors will start at a negative value that both doesn't
     * overlap with the current value ranges for NSS errors and that will fit
     * in 16 bits when negated.
     *
     * Keep these in sync with pkixnss.h.
     */
    const long MOZILLA_PKIX_ERROR_BASE  = -(0x4000);
    const long MOZILLA_PKIX_ERROR_LIMIT = (MOZILLA_PKIX_ERROR_BASE + 1000);
};