зеркало из https://github.com/mozilla/gecko-dev.git
575 строки
18 KiB
C++
575 строки
18 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsPKCS12Blob.h"
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#include "ScopedNSSTypes.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/Casting.h"
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#include "mozilla/Unused.h"
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#include "nsICertificateDialogs.h"
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#include "nsIFile.h"
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#include "nsIInputStream.h"
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#include "nsNSSCertHelper.h"
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#include "nsNSSCertificate.h"
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#include "nsNSSHelper.h"
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#include "nsNetUtil.h"
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#include "nsReadableUtils.h"
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#include "nsThreadUtils.h"
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#include "pkix/pkixtypes.h"
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#include "secerr.h"
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using namespace mozilla;
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extern LazyLogModule gPIPNSSLog;
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#define PIP_PKCS12_TMPFILENAME NS_LITERAL_CSTRING(".pip_p12tmp")
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#define PIP_PKCS12_BUFFER_SIZE 2048
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#define PIP_PKCS12_USER_CANCELED 3
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#define PIP_PKCS12_NOSMARTCARD_EXPORT 4
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#define PIP_PKCS12_RESTORE_FAILED 5
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#define PIP_PKCS12_BACKUP_FAILED 6
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#define PIP_PKCS12_NSS_ERROR 7
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// constructor
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nsPKCS12Blob::nsPKCS12Blob()
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: mCertArray(nullptr)
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, mTmpFile(nullptr)
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{
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mUIContext = new PipUIContext();
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}
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// destructor
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nsPKCS12Blob::~nsPKCS12Blob()
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{
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nsNSSShutDownPreventionLock locker;
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if (isAlreadyShutDown()) {
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return;
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}
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shutdown(ShutdownCalledFrom::Object);
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}
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// nsPKCS12Blob::ImportFromFile
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//
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// Given a file handle, read a PKCS#12 blob from that file, decode it, and
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// import the results into the internal database.
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nsresult
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nsPKCS12Blob::ImportFromFile(nsIFile *file)
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{
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nsNSSShutDownPreventionLock locker;
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nsresult rv = NS_OK;
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RetryReason wantRetry;
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do {
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rv = ImportFromFileHelper(file, im_standard_prompt, wantRetry);
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if (NS_SUCCEEDED(rv) && wantRetry == rr_auto_retry_empty_password_flavors) {
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rv = ImportFromFileHelper(file, im_try_zero_length_secitem, wantRetry);
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}
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}
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while (NS_SUCCEEDED(rv) && (wantRetry != rr_do_not_retry));
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return rv;
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}
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nsresult
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nsPKCS12Blob::ImportFromFileHelper(nsIFile *file,
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nsPKCS12Blob::ImportMode aImportMode,
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nsPKCS12Blob::RetryReason &aWantRetry)
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{
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nsNSSShutDownPreventionLock locker;
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nsresult rv = NS_OK;
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SECStatus srv = SECSuccess;
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SEC_PKCS12DecoderContext *dcx = nullptr;
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SECItem unicodePw = { siBuffer, nullptr, 0 };
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aWantRetry = rr_do_not_retry;
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UniquePK11SlotInfo slot(PK11_GetInternalKeySlot());
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if (!slot) {
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srv = SECFailure;
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goto finish;
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}
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if (aImportMode == im_try_zero_length_secitem) {
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unicodePw.len = 0;
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} else {
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// get file password (unicode)
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rv = getPKCS12FilePassword(&unicodePw);
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if (NS_FAILED(rv)) goto finish;
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if (!unicodePw.data) {
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handleError(PIP_PKCS12_USER_CANCELED);
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return NS_OK;
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}
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}
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// initialize the decoder
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dcx = SEC_PKCS12DecoderStart(&unicodePw, slot.get(), nullptr, nullptr,
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nullptr, nullptr, nullptr, nullptr);
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if (!dcx) {
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srv = SECFailure;
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goto finish;
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}
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// read input file and feed it to the decoder
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rv = inputToDecoder(dcx, file);
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if (NS_FAILED(rv)) {
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if (NS_ERROR_ABORT == rv) {
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// inputToDecoder indicated a NSS error
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srv = SECFailure;
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}
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goto finish;
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}
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// verify the blob
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srv = SEC_PKCS12DecoderVerify(dcx);
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if (srv) goto finish;
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// validate bags
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srv = SEC_PKCS12DecoderValidateBags(dcx, nickname_collision);
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if (srv) goto finish;
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// import cert and key
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srv = SEC_PKCS12DecoderImportBags(dcx);
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if (srv) goto finish;
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// Later - check to see if this should become default email cert
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finish:
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// If srv != SECSuccess, NSS probably set a specific error code.
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// We should use that error code instead of inventing a new one
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// for every error possible.
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if (srv != SECSuccess) {
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if (SEC_ERROR_BAD_PASSWORD == PORT_GetError()) {
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if (unicodePw.len == sizeof(char16_t))
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{
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// no password chars available,
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// unicodeToItem allocated space for the trailing zero character only.
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aWantRetry = rr_auto_retry_empty_password_flavors;
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}
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else
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{
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aWantRetry = rr_bad_password;
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handleError(PIP_PKCS12_NSS_ERROR);
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}
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}
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else
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{
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handleError(PIP_PKCS12_NSS_ERROR);
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}
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} else if (NS_FAILED(rv)) {
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handleError(PIP_PKCS12_RESTORE_FAILED);
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}
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// finish the decoder
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if (dcx)
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SEC_PKCS12DecoderFinish(dcx);
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SECITEM_ZfreeItem(&unicodePw, false);
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return NS_OK;
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}
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static bool
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isExtractable(SECKEYPrivateKey *privKey)
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{
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ScopedAutoSECItem value;
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SECStatus rv = PK11_ReadRawAttribute(PK11_TypePrivKey, privKey,
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CKA_EXTRACTABLE, &value);
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if (rv != SECSuccess) {
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return false;
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}
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bool isExtractable = false;
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if ((value.len == 1) && value.data) {
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isExtractable = !!(*(CK_BBOOL*)value.data);
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}
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return isExtractable;
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}
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// nsPKCS12Blob::ExportToFile
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//
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// Having already loaded the certs, form them into a blob (loading the keys
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// also), encode the blob, and stuff it into the file.
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nsresult
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nsPKCS12Blob::ExportToFile(nsIFile *file,
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nsIX509Cert **certs, int numCerts)
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{
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nsNSSShutDownPreventionLock locker;
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nsresult rv;
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SECStatus srv = SECSuccess;
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SEC_PKCS12ExportContext *ecx = nullptr;
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SEC_PKCS12SafeInfo *certSafe = nullptr, *keySafe = nullptr;
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SECItem unicodePw;
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nsAutoString filePath;
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int i;
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nsCOMPtr<nsIFile> localFileRef;
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// init slot
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bool InformedUserNoSmartcardBackup = false;
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int numCertsExported = 0;
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// get file password (unicode)
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unicodePw.data = nullptr;
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rv = newPKCS12FilePassword(&unicodePw);
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if (NS_FAILED(rv)) goto finish;
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if (!unicodePw.data) {
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handleError(PIP_PKCS12_USER_CANCELED);
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return NS_OK;
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}
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// what about slotToUse in psm 1.x ???
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// create export context
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ecx = SEC_PKCS12CreateExportContext(nullptr, nullptr, nullptr /*slot*/, nullptr);
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if (!ecx) {
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srv = SECFailure;
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goto finish;
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}
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// add password integrity
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srv = SEC_PKCS12AddPasswordIntegrity(ecx, &unicodePw, SEC_OID_SHA1);
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if (srv) goto finish;
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for (i=0; i<numCerts; i++) {
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nsNSSCertificate *cert = (nsNSSCertificate *)certs[i];
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// get it as a CERTCertificate XXX
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UniqueCERTCertificate nssCert(cert->GetCert());
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if (!nssCert) {
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rv = NS_ERROR_FAILURE;
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goto finish;
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}
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// We can only successfully export certs that are on
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// internal token. Most, if not all, smart card vendors
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// won't let you extract the private key (in any way
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// shape or form) from the card. So let's punt if
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// the cert is not in the internal db.
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if (nssCert->slot && !PK11_IsInternal(nssCert->slot)) {
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// we aren't the internal token, see if the key is extractable.
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SECKEYPrivateKey *privKey=PK11_FindKeyByDERCert(nssCert->slot,
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nssCert.get(), this);
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if (privKey) {
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bool privKeyIsExtractable = isExtractable(privKey);
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SECKEY_DestroyPrivateKey(privKey);
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if (!privKeyIsExtractable) {
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if (!InformedUserNoSmartcardBackup) {
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InformedUserNoSmartcardBackup = true;
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handleError(PIP_PKCS12_NOSMARTCARD_EXPORT);
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}
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continue;
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}
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}
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}
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// XXX this is why, to verify the slot is the same
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// PK11_FindObjectForCert(nssCert, nullptr, slot);
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// create the cert and key safes
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keySafe = SEC_PKCS12CreateUnencryptedSafe(ecx);
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if (!SEC_PKCS12IsEncryptionAllowed() || PK11_IsFIPS()) {
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certSafe = keySafe;
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} else {
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certSafe = SEC_PKCS12CreatePasswordPrivSafe(ecx, &unicodePw,
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SEC_OID_PKCS12_V2_PBE_WITH_SHA1_AND_40_BIT_RC2_CBC);
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}
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if (!certSafe || !keySafe) {
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rv = NS_ERROR_FAILURE;
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goto finish;
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}
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// add the cert and key to the blob
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srv = SEC_PKCS12AddCertAndKey(ecx, certSafe, nullptr, nssCert.get(),
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CERT_GetDefaultCertDB(), // XXX
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keySafe, nullptr, true, &unicodePw,
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SEC_OID_PKCS12_V2_PBE_WITH_SHA1_AND_3KEY_TRIPLE_DES_CBC);
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if (srv) goto finish;
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// cert was dup'ed, so release it
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++numCertsExported;
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}
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if (!numCertsExported) goto finish;
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// prepare the instance to write to an export file
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this->mTmpFile = nullptr;
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file->GetPath(filePath);
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// Use the nsCOMPtr var localFileRef so that
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// the reference to the nsIFile we create gets released as soon as
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// we're out of scope, ie when this function exits.
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if (filePath.RFind(".p12", true, -1, 4) < 0) {
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// We're going to add the .p12 extension to the file name just like
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// Communicator used to. We create a new nsIFile and initialize
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// it with the new patch.
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filePath.AppendLiteral(".p12");
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localFileRef = do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, &rv);
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if (NS_FAILED(rv)) goto finish;
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localFileRef->InitWithPath(filePath);
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file = localFileRef;
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}
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rv = file->OpenNSPRFileDesc(PR_RDWR|PR_CREATE_FILE|PR_TRUNCATE, 0664,
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&mTmpFile);
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if (NS_FAILED(rv) || !this->mTmpFile) goto finish;
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// encode and write
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srv = SEC_PKCS12Encode(ecx, write_export_file, this);
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if (srv) goto finish;
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finish:
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if (NS_FAILED(rv) || srv != SECSuccess) {
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handleError(PIP_PKCS12_BACKUP_FAILED);
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}
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if (ecx)
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SEC_PKCS12DestroyExportContext(ecx);
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if (this->mTmpFile) {
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PR_Close(this->mTmpFile);
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this->mTmpFile = nullptr;
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}
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SECITEM_ZfreeItem(&unicodePw, false);
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return rv;
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}
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///////////////////////////////////////////////////////////////////////
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//
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// private members
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//
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///////////////////////////////////////////////////////////////////////
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// unicodeToItem
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//
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// For the NSS PKCS#12 library, must convert PRUnichars (shorts) to
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// a buffer of octets. Must handle byte order correctly.
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nsresult
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nsPKCS12Blob::unicodeToItem(const nsString& uni, SECItem* item)
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{
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uint32_t len = uni.Length() + 1; // +1 for the null terminator.
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if (!SECITEM_AllocItem(nullptr, item, sizeof(char16_t) * len)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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// We have to use a cast here because on Windows, uni.get() returns
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// char16ptr_t instead of char16_t*.
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mozilla::NativeEndian::copyAndSwapToBigEndian(
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item->data,
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static_cast<const char16_t*>(uni.get()),
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len);
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return NS_OK;
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}
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// newPKCS12FilePassword
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//
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// Launch a dialog requesting the user for a new PKCS#12 file passowrd.
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// Handle user canceled by returning null password (caller must catch).
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nsresult
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nsPKCS12Blob::newPKCS12FilePassword(SECItem *unicodePw)
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{
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nsresult rv = NS_OK;
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nsAutoString password;
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nsCOMPtr<nsICertificateDialogs> certDialogs;
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rv = ::getNSSDialogs(getter_AddRefs(certDialogs),
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NS_GET_IID(nsICertificateDialogs),
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NS_CERTIFICATEDIALOGS_CONTRACTID);
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if (NS_FAILED(rv)) return rv;
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bool pressedOK;
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rv = certDialogs->SetPKCS12FilePassword(mUIContext, password, &pressedOK);
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if (NS_FAILED(rv) || !pressedOK) return rv;
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return unicodeToItem(password, unicodePw);
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}
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// getPKCS12FilePassword
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//
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// Launch a dialog requesting the user for the password to a PKCS#12 file.
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// Handle user canceled by returning null password (caller must catch).
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nsresult
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nsPKCS12Blob::getPKCS12FilePassword(SECItem *unicodePw)
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{
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nsresult rv = NS_OK;
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nsAutoString password;
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nsCOMPtr<nsICertificateDialogs> certDialogs;
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rv = ::getNSSDialogs(getter_AddRefs(certDialogs),
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NS_GET_IID(nsICertificateDialogs),
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NS_CERTIFICATEDIALOGS_CONTRACTID);
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if (NS_FAILED(rv)) return rv;
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bool pressedOK;
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rv = certDialogs->GetPKCS12FilePassword(mUIContext, password, &pressedOK);
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if (NS_FAILED(rv) || !pressedOK) return rv;
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return unicodeToItem(password, unicodePw);
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}
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// inputToDecoder
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//
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// Given a decoder, read bytes from file and input them to the decoder.
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nsresult
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nsPKCS12Blob::inputToDecoder(SEC_PKCS12DecoderContext *dcx, nsIFile *file)
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{
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nsNSSShutDownPreventionLock locker;
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nsresult rv;
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SECStatus srv;
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uint32_t amount;
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char buf[PIP_PKCS12_BUFFER_SIZE];
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nsCOMPtr<nsIInputStream> fileStream;
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rv = NS_NewLocalFileInputStream(getter_AddRefs(fileStream), file);
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if (NS_FAILED(rv)) {
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return rv;
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}
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while (true) {
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rv = fileStream->Read(buf, PIP_PKCS12_BUFFER_SIZE, &amount);
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if (NS_FAILED(rv)) {
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return rv;
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}
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// feed the file data into the decoder
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srv = SEC_PKCS12DecoderUpdate(dcx,
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(unsigned char*) buf,
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amount);
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if (srv) {
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// don't allow the close call to overwrite our precious error code
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int pr_err = PORT_GetError();
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PORT_SetError(pr_err);
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return NS_ERROR_ABORT;
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}
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if (amount < PIP_PKCS12_BUFFER_SIZE)
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break;
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}
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return NS_OK;
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}
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// nickname_collision
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// what to do when the nickname collides with one already in the db.
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// TODO: not handled, throw a dialog allowing the nick to be changed?
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SECItem *
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nsPKCS12Blob::nickname_collision(SECItem *oldNick, PRBool *cancel, void *wincx)
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{
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nsNSSShutDownPreventionLock locker;
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*cancel = false;
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int count = 1;
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nsCString nickname;
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nsAutoString nickFromProp;
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nsresult rv = GetPIPNSSBundleString("P12DefaultNickname", nickFromProp);
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if (NS_FAILED(rv)) {
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return nullptr;
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}
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NS_ConvertUTF16toUTF8 nickFromPropC(nickFromProp);
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// The user is trying to import a PKCS#12 file that doesn't have the
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// attribute we use to set the nickname. So in order to reduce the
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// number of interactions we require with the user, we'll build a nickname
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// for the user. The nickname isn't prominently displayed in the UI,
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// so it's OK if we generate one on our own here.
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// XXX If the NSS API were smarter and actually passed a pointer to
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// the CERTCertificate* we're importing we could actually just
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// call default_nickname (which is what the issuance code path
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// does) and come up with a reasonable nickname. Alas, the NSS
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// API limits our ability to produce a useful nickname without
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// bugging the user. :(
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while (1) {
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// If we've gotten this far, that means there isn't a certificate
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// in the database that has the same subject name as the cert we're
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// trying to import. So we need to come up with a "nickname" to
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// satisfy the NSS requirement or fail in trying to import.
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// Basically we use a default nickname from a properties file and
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// see if a certificate exists with that nickname. If there isn't, then
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// create update the count by one and append the string '#1' Or
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// whatever the count currently is, and look for a cert with
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// that nickname. Keep updating the count until we find a nickname
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// without a corresponding cert.
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// XXX If a user imports *many* certs without the 'friendly name'
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// attribute, then this may take a long time. :(
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nickname = nickFromPropC;
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if (count > 1) {
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nickname.AppendPrintf(" #%d", count);
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}
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UniqueCERTCertificate cert(CERT_FindCertByNickname(CERT_GetDefaultCertDB(),
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nickname.get()));
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if (!cert) {
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break;
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}
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count++;
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}
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SECItem *newNick = new SECItem;
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if (!newNick)
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return nullptr;
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newNick->type = siAsciiString;
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newNick->data = (unsigned char*) strdup(nickname.get());
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newNick->len = strlen((char*)newNick->data);
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return newNick;
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}
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// write_export_file
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// write bytes to the exported PKCS#12 file
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void
|
|
nsPKCS12Blob::write_export_file(void *arg, const char *buf, unsigned long len)
|
|
{
|
|
nsPKCS12Blob *cx = (nsPKCS12Blob *)arg;
|
|
PR_Write(cx->mTmpFile, buf, len);
|
|
}
|
|
|
|
// pip_ucs2_ascii_conversion_fn
|
|
// required to be set by NSS (to do PKCS#12), but since we've already got
|
|
// unicode make this a no-op.
|
|
PRBool
|
|
pip_ucs2_ascii_conversion_fn(PRBool toUnicode,
|
|
unsigned char *inBuf,
|
|
unsigned int inBufLen,
|
|
unsigned char *outBuf,
|
|
unsigned int maxOutBufLen,
|
|
unsigned int *outBufLen,
|
|
PRBool swapBytes)
|
|
{
|
|
// do a no-op, since I've already got unicode. Hah!
|
|
*outBufLen = inBufLen;
|
|
memcpy(outBuf, inBuf, inBufLen);
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsPKCS12Blob::handleError(int myerr)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
if (!NS_IsMainThread()) {
|
|
return;
|
|
}
|
|
|
|
int prerr = PORT_GetError();
|
|
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("PKCS12: NSS/NSPR error(%d)", prerr));
|
|
MOZ_LOG(gPIPNSSLog, LogLevel::Debug, ("PKCS12: I called(%d)", myerr));
|
|
|
|
const char * msgID = nullptr;
|
|
|
|
switch (myerr) {
|
|
case PIP_PKCS12_USER_CANCELED:
|
|
return; /* Just ignore it for now */
|
|
case PIP_PKCS12_NOSMARTCARD_EXPORT: msgID = "PKCS12InfoNoSmartcardBackup"; break;
|
|
case PIP_PKCS12_RESTORE_FAILED: msgID = "PKCS12UnknownErrRestore"; break;
|
|
case PIP_PKCS12_BACKUP_FAILED: msgID = "PKCS12UnknownErrBackup"; break;
|
|
case PIP_PKCS12_NSS_ERROR:
|
|
switch (prerr) {
|
|
// The following errors have the potential to be "handled", by asking
|
|
// the user (via a dialog) whether s/he wishes to continue
|
|
case 0: break;
|
|
case SEC_ERROR_PKCS12_CERT_COLLISION:
|
|
/* pop a dialog saying the cert is already in the database */
|
|
/* ask to keep going? what happens if one collision but others ok? */
|
|
// The following errors cannot be "handled", notify the user (via an alert)
|
|
// that the operation failed.
|
|
case SEC_ERROR_BAD_PASSWORD: msgID = "PK11BadPassword"; break;
|
|
|
|
case SEC_ERROR_BAD_DER:
|
|
case SEC_ERROR_PKCS12_CORRUPT_PFX_STRUCTURE:
|
|
case SEC_ERROR_PKCS12_INVALID_MAC:
|
|
msgID = "PKCS12DecodeErr";
|
|
break;
|
|
|
|
case SEC_ERROR_PKCS12_DUPLICATE_DATA: msgID = "PKCS12DupData"; break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (!msgID)
|
|
msgID = "PKCS12UnknownErr";
|
|
|
|
nsCOMPtr<nsIWindowWatcher> wwatch(do_GetService(NS_WINDOWWATCHER_CONTRACTID));
|
|
if (!wwatch) {
|
|
return;
|
|
}
|
|
nsCOMPtr<nsIPrompt> prompter;
|
|
if (NS_FAILED(wwatch->GetNewPrompter(nullptr, getter_AddRefs(prompter)))) {
|
|
return;
|
|
}
|
|
nsAutoString message;
|
|
if (NS_FAILED(GetPIPNSSBundleString(msgID, message))) {
|
|
return;
|
|
}
|
|
|
|
Unused << prompter->Alert(nullptr, message.get());
|
|
}
|