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/* 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 "NSSErrorsService.h"
#include "nsIStringBundle.h"
#include "nsNSSComponent.h"
#include "nsServiceManagerUtils.h"
#include "mozpkix/pkixnss.h"
#include "secerr.h"
#include "sslerr.h"
#define PIPNSS_STRBUNDLE_URL "chrome://pipnss/locale/pipnss.properties"
#define NSSERR_STRBUNDLE_URL "chrome://pipnss/locale/nsserrors.properties"
namespace mozilla {
namespace psm {
static_assert(mozilla::pkix::ERROR_BASE ==
nsINSSErrorsService::MOZILLA_PKIX_ERROR_BASE,
"MOZILLA_PKIX_ERROR_BASE and "
"nsINSSErrorsService::MOZILLA_PKIX_ERROR_BASE do not match.");
static_assert(mozilla::pkix::ERROR_LIMIT ==
nsINSSErrorsService::MOZILLA_PKIX_ERROR_LIMIT,
"MOZILLA_PKIX_ERROR_LIMIT and "
"nsINSSErrorsService::MOZILLA_PKIX_ERROR_LIMIT do not match.");
static bool IsPSMError(PRErrorCode error) {
return (error >= mozilla::pkix::ERROR_BASE &&
error < mozilla::pkix::ERROR_LIMIT);
}
NS_IMPL_ISUPPORTS(NSSErrorsService, nsINSSErrorsService)
NSSErrorsService::~NSSErrorsService() = default;
nsresult NSSErrorsService::Init() {
nsresult rv;
nsCOMPtr<nsIStringBundleService> bundleService(
do_GetService(NS_STRINGBUNDLE_CONTRACTID, &rv));
if (NS_FAILED(rv) || !bundleService) return NS_ERROR_FAILURE;
bundleService->CreateBundle(PIPNSS_STRBUNDLE_URL,
getter_AddRefs(mPIPNSSBundle));
if (!mPIPNSSBundle) rv = NS_ERROR_FAILURE;
bundleService->CreateBundle(NSSERR_STRBUNDLE_URL,
getter_AddRefs(mNSSErrorsBundle));
if (!mNSSErrorsBundle) rv = NS_ERROR_FAILURE;
return rv;
}
#define EXPECTED_SEC_ERROR_BASE (-0x2000)
#define EXPECTED_SSL_ERROR_BASE (-0x3000)
#if SEC_ERROR_BASE != EXPECTED_SEC_ERROR_BASE || \
SSL_ERROR_BASE != EXPECTED_SSL_ERROR_BASE
# error \
"Unexpected change of error code numbers in lib NSS, please adjust the mapping code"
/*
* Please ensure the NSS error codes are mapped into the positive range 0x1000
* to 0xf000 Search for NS_ERROR_MODULE_SECURITY to ensure there are no
* conflicts. The current code also assumes that NSS library error codes are
* negative.
*/
#endif
bool IsNSSErrorCode(PRErrorCode code) {
return IS_SEC_ERROR(code) || IS_SSL_ERROR(code) || IsPSMError(code);
}
nsresult GetXPCOMFromNSSError(PRErrorCode code) {
if (!code) {
MOZ_CRASH("Function failed without calling PR_GetError");
}
// The error codes within each module must be a 16 bit value.
// For simplicity we use the positive value of the NSS code.
return (nsresult)NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_SECURITY,
-1 * code);
}
NS_IMETHODIMP
NSSErrorsService::IsNSSErrorCode(int32_t aNSPRCode, bool* _retval) {
if (!_retval) {
return NS_ERROR_INVALID_ARG;
}
*_retval = mozilla::psm::IsNSSErrorCode(aNSPRCode);
return NS_OK;
}
NS_IMETHODIMP
NSSErrorsService::GetXPCOMFromNSSError(int32_t aNSPRCode,
nsresult* aXPCOMErrorCode) {
if (!aXPCOMErrorCode) {
return NS_ERROR_INVALID_ARG;
}
if (!mozilla::psm::IsNSSErrorCode(aNSPRCode)) {
return NS_ERROR_INVALID_ARG;
}
*aXPCOMErrorCode = mozilla::psm::GetXPCOMFromNSSError(aNSPRCode);
return NS_OK;
}
NS_IMETHODIMP
NSSErrorsService::GetErrorClass(nsresult aXPCOMErrorCode,
uint32_t* aErrorClass) {
NS_ENSURE_ARG(aErrorClass);
if (NS_ERROR_GET_MODULE(aXPCOMErrorCode) != NS_ERROR_MODULE_SECURITY ||
NS_ERROR_GET_SEVERITY(aXPCOMErrorCode) != NS_ERROR_SEVERITY_ERROR) {
return NS_ERROR_FAILURE;
}
int32_t aNSPRCode = -1 * NS_ERROR_GET_CODE(aXPCOMErrorCode);
if (!mozilla::psm::IsNSSErrorCode(aNSPRCode)) {
return NS_ERROR_FAILURE;
}
if (mozilla::psm::ErrorIsOverridable(aNSPRCode)) {
*aErrorClass = ERROR_CLASS_BAD_CERT;
} else {
*aErrorClass = ERROR_CLASS_SSL_PROTOCOL;
}
return NS_OK;
}
bool ErrorIsOverridable(PRErrorCode code) {
switch (code) {
// Overridable errors.
case mozilla::pkix::MOZILLA_PKIX_ERROR_ADDITIONAL_POLICY_CONSTRAINT_FAILED:
case mozilla::pkix::MOZILLA_PKIX_ERROR_CA_CERT_USED_AS_END_ENTITY:
case mozilla::pkix::MOZILLA_PKIX_ERROR_EMPTY_ISSUER_NAME:
case mozilla::pkix::MOZILLA_PKIX_ERROR_INADEQUATE_KEY_SIZE:
case mozilla::pkix::MOZILLA_PKIX_ERROR_MITM_DETECTED:
case mozilla::pkix::MOZILLA_PKIX_ERROR_NOT_YET_VALID_CERTIFICATE:
case mozilla::pkix::MOZILLA_PKIX_ERROR_NOT_YET_VALID_ISSUER_CERTIFICATE:
case mozilla::pkix::MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT:
case mozilla::pkix::MOZILLA_PKIX_ERROR_V1_CERT_USED_AS_CA:
case SEC_ERROR_CA_CERT_INVALID:
case SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED:
case SEC_ERROR_EXPIRED_CERTIFICATE:
case SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE:
case SEC_ERROR_INVALID_TIME:
case SEC_ERROR_UNKNOWN_ISSUER:
case SSL_ERROR_BAD_CERT_DOMAIN:
return true;
// Non-overridable errors.
default:
return false;
}
}
static const char* getOverrideErrorStringName(PRErrorCode aErrorCode) {
switch (aErrorCode) {
case SSL_ERROR_SSL_DISABLED:
return "PSMERR_SSL_Disabled";
case SSL_ERROR_SSL2_DISABLED:
return "PSMERR_SSL2_Disabled";
case SEC_ERROR_REUSED_ISSUER_AND_SERIAL:
return "PSMERR_HostReusedIssuerSerial";
case mozilla::pkix::MOZILLA_PKIX_ERROR_MITM_DETECTED:
return "certErrorTrust_MitM";
default:
return nullptr;
}
}
NS_IMETHODIMP
NSSErrorsService::GetErrorMessage(nsresult aXPCOMErrorCode,
nsAString& aErrorMessage) {
if (NS_ERROR_GET_MODULE(aXPCOMErrorCode) != NS_ERROR_MODULE_SECURITY ||
NS_ERROR_GET_SEVERITY(aXPCOMErrorCode) != NS_ERROR_SEVERITY_ERROR) {
return NS_ERROR_FAILURE;
}
int32_t aNSPRCode = -1 * NS_ERROR_GET_CODE(aXPCOMErrorCode);
if (!mozilla::psm::IsNSSErrorCode(aNSPRCode)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIStringBundle> theBundle = mPIPNSSBundle;
const char* idStr = getOverrideErrorStringName(aNSPRCode);
if (!idStr) {
idStr = PR_ErrorToName(aNSPRCode);
theBundle = mNSSErrorsBundle;
}
if (!idStr || !theBundle) {
return NS_ERROR_FAILURE;
}
nsAutoString msg;
nsresult rv = theBundle->GetStringFromName(idStr, msg);
if (NS_SUCCEEDED(rv)) {
aErrorMessage = msg;
}
return rv;
}
} // namespace psm
} // namespace mozilla
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