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gecko/modules/libjar/nsJAR.cpp
Mike Hommey e56745d75b Bug 620931 part 3 - Allow GRE and XUL application to use omni.jar independently. r=bsmedberg,r=mwu 
We now store two independent locations for an omni.jar, allowing GRE/XRE and
XUL application to each have their own omni.jar. And since xulrunner setups
are very independent from the XUL applications, we implement support for both
omni.jar and non omni.jar cases in the same runtime, with the side effect of
allowing to switch from one to the other manually without rebuilding the
binaries.

We let the mozilla::Omnijar API handle both cases, so that callers don't need
too much work to support them.

We also make the preferences service load the same set of preferences in all
the various cases (unified vs. separate, omni.jar vs. no omni.jar).

The child process launcher for IPC is modified to pass the base directories
needed for the mozilla::Omnijar API initialization in the child process.

Finally, the startupcache file name canonicalization is modified to separate
APP and GRE resources.
2011-02-25 12:53:36 +01:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Daniel Veditz <dveditz@netscape.com>
* Samir Gehani <sgehani@netscape.com>
* Mitch Stoltz <mstoltz@netsape.com>
* Pierre Phaneuf <pp@ludusdesign.com>
* Jeff Walden <jwalden+code@mit.edu>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <string.h>
#include "nsJARInputStream.h"
#include "nsJAR.h"
#include "nsILocalFile.h"
#include "nsIConsoleService.h"
#include "nsICryptoHash.h"
#include "prprf.h"
#include "mozilla/Omnijar.h"
#ifdef XP_UNIX
#include <sys/stat.h>
#elif defined (XP_WIN) || defined(XP_OS2)
#include <io.h>
#endif
using namespace mozilla;
//----------------------------------------------
// nsJARManifestItem declaration
//----------------------------------------------
/*
* nsJARManifestItem contains meta-information pertaining
* to an individual JAR entry, taken from the
* META-INF/MANIFEST.MF and META-INF/ *.SF files.
* This is security-critical information, defined here so it is not
* accessible from anywhere else.
*/
typedef enum
{
JAR_INVALID = 1,
JAR_INTERNAL = 2,
JAR_EXTERNAL = 3
} JARManifestItemType;
class nsJARManifestItem
{
public:
JARManifestItemType mType;
// True if the second step of verification (VerifyEntry)
// has taken place:
PRBool entryVerified;
// Not signed, valid, or failure code
PRInt16 status;
// Internal storage of digests
nsCString calculatedSectionDigest;
nsCString storedEntryDigest;
nsJARManifestItem();
virtual ~nsJARManifestItem();
};
//-------------------------------------------------
// nsJARManifestItem constructors and destructor
//-------------------------------------------------
nsJARManifestItem::nsJARManifestItem(): mType(JAR_INTERNAL),
entryVerified(PR_FALSE),
status(JAR_NOT_SIGNED)
{
}
nsJARManifestItem::~nsJARManifestItem()
{
}
//----------------------------------------------
// nsJAR constructor/destructor
//----------------------------------------------
static PRBool
DeleteManifestEntry(nsHashKey* aKey, void* aData, void* closure)
{
//-- deletes an entry in mManifestData.
delete (nsJARManifestItem*)aData;
return PR_TRUE;
}
// The following initialization makes a guess of 10 entries per jarfile.
nsJAR::nsJAR(): mZip(new nsZipArchive()),
mManifestData(nsnull, nsnull, DeleteManifestEntry, nsnull, 10),
mParsedManifest(PR_FALSE),
mGlobalStatus(JAR_MANIFEST_NOT_PARSED),
mReleaseTime(PR_INTERVAL_NO_TIMEOUT),
mCache(nsnull),
mLock("nsJAR::mLock"),
mTotalItemsInManifest(0),
mOpened(PR_FALSE)
{
}
nsJAR::~nsJAR()
{
Close();
}
NS_IMPL_THREADSAFE_QUERY_INTERFACE1(nsJAR, nsIZipReader)
NS_IMPL_THREADSAFE_ADDREF(nsJAR)
// Custom Release method works with nsZipReaderCache...
nsrefcnt nsJAR::Release(void)
{
nsrefcnt count;
NS_PRECONDITION(0 != mRefCnt, "dup release");
count = NS_AtomicDecrementRefcnt(mRefCnt);
NS_LOG_RELEASE(this, count, "nsJAR");
if (0 == count) {
mRefCnt = 1; /* stabilize */
/* enable this to find non-threadsafe destructors: */
/* NS_ASSERT_OWNINGTHREAD(nsJAR); */
delete this;
return 0;
}
else if (1 == count && mCache) {
#ifdef DEBUG
nsresult rv =
#endif
mCache->ReleaseZip(this);
NS_ASSERTION(NS_SUCCEEDED(rv), "failed to release zip file");
}
return count;
}
//----------------------------------------------
// nsIZipReader implementation
//----------------------------------------------
NS_IMETHODIMP
nsJAR::Open(nsIFile* zipFile)
{
NS_ENSURE_ARG_POINTER(zipFile);
if (mOpened) return NS_ERROR_FAILURE; // Already open!
mZipFile = zipFile;
mOuterZipEntry.Truncate();
mOpened = PR_TRUE;
// The omnijar is special, it is opened early on and closed late
// this avoids reopening it
nsZipArchive *zip = mozilla::Omnijar::GetReader(zipFile);
if (zip) {
mZip = zip;
return NS_OK;
}
return mZip->OpenArchive(zipFile);
}
NS_IMETHODIMP
nsJAR::OpenInner(nsIZipReader *aZipReader, const char *aZipEntry)
{
NS_ENSURE_ARG_POINTER(aZipReader);
NS_ENSURE_ARG_POINTER(aZipEntry);
if (mOpened) return NS_ERROR_FAILURE; // Already open!
PRBool exist;
nsresult rv = aZipReader->HasEntry(nsDependentCString(aZipEntry), &exist);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(exist, NS_ERROR_FILE_NOT_FOUND);
rv = aZipReader->GetFile(getter_AddRefs(mZipFile));
NS_ENSURE_SUCCESS(rv, rv);
mOpened = PR_TRUE;
mOuterZipEntry.Assign(aZipEntry);
nsRefPtr<nsZipHandle> handle;
rv = nsZipHandle::Init(static_cast<nsJAR*>(aZipReader)->mZip.get(), aZipEntry,
getter_AddRefs(handle));
if (NS_FAILED(rv))
return rv;
return mZip->OpenArchive(handle);
}
NS_IMETHODIMP
nsJAR::GetFile(nsIFile* *result)
{
*result = mZipFile;
NS_IF_ADDREF(*result);
return NS_OK;
}
NS_IMETHODIMP
nsJAR::Close()
{
mOpened = PR_FALSE;
mParsedManifest = PR_FALSE;
mManifestData.Reset();
mGlobalStatus = JAR_MANIFEST_NOT_PARSED;
mTotalItemsInManifest = 0;
if ((mZip == mozilla::Omnijar::GetReader(mozilla::Omnijar::GRE)) ||
(mZip == mozilla::Omnijar::GetReader(mozilla::Omnijar::APP))) {
mZip.forget();
mZip = new nsZipArchive();
return NS_OK;
}
return mZip->CloseArchive();
}
NS_IMETHODIMP
nsJAR::Test(const char *aEntryName)
{
return mZip->Test(aEntryName);
}
NS_IMETHODIMP
nsJAR::Extract(const char *zipEntry, nsIFile* outFile)
{
// nsZipArchive and zlib are not thread safe
// we need to use a lock to prevent bug #51267
MutexAutoLock lock(mLock);
nsresult rv;
nsCOMPtr<nsILocalFile> localFile = do_QueryInterface(outFile, &rv);
if (NS_FAILED(rv)) return rv;
nsZipItem *item = mZip->GetItem(zipEntry);
NS_ENSURE_TRUE(item, NS_ERROR_FILE_TARGET_DOES_NOT_EXIST);
// Remove existing file or directory so we set permissions correctly.
// If it's a directory that already exists and contains files, throw
// an exception and return.
//XXX Bug 332139:
//XXX If we guarantee that rv in the case of a non-empty directory
//XXX is always FILE_DIR_NOT_EMPTY, we can remove
//XXX |rv == NS_ERROR_FAILURE| - bug 322183 needs to be completely
//XXX fixed before that can happen
rv = localFile->Remove(PR_FALSE);
if (rv == NS_ERROR_FILE_DIR_NOT_EMPTY ||
rv == NS_ERROR_FAILURE)
return rv;
if (item->IsDirectory())
{
rv = localFile->Create(nsIFile::DIRECTORY_TYPE, item->Mode());
//XXX Do this in nsZipArchive? It would be nice to keep extraction
//XXX code completely there, but that would require a way to get a
//XXX PRDir from localFile.
}
else
{
PRFileDesc* fd;
rv = localFile->OpenNSPRFileDesc(PR_WRONLY | PR_CREATE_FILE, item->Mode(), &fd);
if (NS_FAILED(rv)) return rv;
// ExtractFile also closes the fd handle and resolves the symlink if needed
nsCAutoString path;
rv = outFile->GetNativePath(path);
if (NS_FAILED(rv)) return rv;
rv = mZip->ExtractFile(item, path.get(), fd);
}
if (NS_FAILED(rv)) return rv;
// nsIFile needs milliseconds, while prtime is in microseconds.
// non-fatal if this fails, ignore errors
outFile->SetLastModifiedTime(item->LastModTime() / PR_USEC_PER_MSEC);
return NS_OK;
}
NS_IMETHODIMP
nsJAR::GetEntry(const char *aEntryName, nsIZipEntry* *result)
{
nsZipItem* zipItem = mZip->GetItem(aEntryName);
NS_ENSURE_TRUE(zipItem, NS_ERROR_FILE_TARGET_DOES_NOT_EXIST);
nsJARItem* jarItem = new nsJARItem(zipItem);
NS_ENSURE_TRUE(jarItem, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*result = jarItem);
return NS_OK;
}
NS_IMETHODIMP
nsJAR::HasEntry(const nsACString &aEntryName, PRBool *result)
{
*result = mZip->GetItem(PromiseFlatCString(aEntryName).get()) != nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsJAR::FindEntries(const char *aPattern, nsIUTF8StringEnumerator **result)
{
NS_ENSURE_ARG_POINTER(result);
nsZipFind *find;
nsresult rv = mZip->FindInit(aPattern, &find);
NS_ENSURE_SUCCESS(rv, rv);
nsIUTF8StringEnumerator *zipEnum = new nsJAREnumerator(find);
if (!zipEnum) {
delete find;
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(*result = zipEnum);
return NS_OK;
}
NS_IMETHODIMP
nsJAR::GetInputStream(const char* aFilename, nsIInputStream** result)
{
return GetInputStreamWithSpec(EmptyCString(), aFilename, result);
}
NS_IMETHODIMP
nsJAR::GetInputStreamWithSpec(const nsACString& aJarDirSpec,
const char* aEntryName, nsIInputStream** result)
{
NS_ENSURE_ARG_POINTER(aEntryName);
NS_ENSURE_ARG_POINTER(result);
// Watch out for the jar:foo.zip!/ (aDir is empty) top-level special case!
nsZipItem *item = nsnull;
if (*aEntryName) {
// First check if item exists in jar
item = mZip->GetItem(aEntryName);
if (!item) return NS_ERROR_FILE_TARGET_DOES_NOT_EXIST;
}
nsJARInputStream* jis = new nsJARInputStream();
// addref now so we can call InitFile/InitDirectory()
NS_ENSURE_TRUE(jis, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*result = jis);
nsresult rv = NS_OK;
if (!item || item->IsDirectory()) {
rv = jis->InitDirectory(this, aJarDirSpec, aEntryName);
} else {
rv = jis->InitFile(this, item);
}
if (NS_FAILED(rv)) {
NS_RELEASE(*result);
}
return rv;
}
NS_IMETHODIMP
nsJAR::GetCertificatePrincipal(const char* aFilename, nsIPrincipal** aPrincipal)
{
//-- Parameter check
if (!aPrincipal)
return NS_ERROR_NULL_POINTER;
*aPrincipal = nsnull;
// Don't check signatures in the omnijar - this is only
// interesting for extensions/XPIs.
if ((mZip == mozilla::Omnijar::GetReader(mozilla::Omnijar::GRE)) ||
(mZip == mozilla::Omnijar::GetReader(mozilla::Omnijar::APP)))
return NS_OK;
//-- Parse the manifest
nsresult rv = ParseManifest();
if (NS_FAILED(rv)) return rv;
if (mGlobalStatus == JAR_NO_MANIFEST)
return NS_OK;
PRInt16 requestedStatus;
if (aFilename)
{
//-- Find the item
nsCStringKey key(aFilename);
nsJARManifestItem* manItem = static_cast<nsJARManifestItem*>(mManifestData.Get(&key));
if (!manItem)
return NS_OK;
//-- Verify the item against the manifest
if (!manItem->entryVerified)
{
nsXPIDLCString entryData;
PRUint32 entryDataLen;
rv = LoadEntry(aFilename, getter_Copies(entryData), &entryDataLen);
if (NS_FAILED(rv)) return rv;
rv = VerifyEntry(manItem, entryData, entryDataLen);
if (NS_FAILED(rv)) return rv;
}
requestedStatus = manItem->status;
}
else // User wants identity of signer w/o verifying any entries
requestedStatus = mGlobalStatus;
if (requestedStatus != JAR_VALID_MANIFEST)
ReportError(aFilename, requestedStatus);
else // Valid signature
{
*aPrincipal = mPrincipal;
NS_IF_ADDREF(*aPrincipal);
}
return NS_OK;
}
NS_IMETHODIMP
nsJAR::GetManifestEntriesCount(PRUint32* count)
{
*count = mTotalItemsInManifest;
return NS_OK;
}
nsresult
nsJAR::GetJarPath(nsACString& aResult)
{
NS_ENSURE_ARG_POINTER(mZipFile);
return mZipFile->GetNativePath(aResult);
}
//----------------------------------------------
// nsJAR private implementation
//----------------------------------------------
nsresult
nsJAR::LoadEntry(const char* aFilename, char** aBuf, PRUint32* aBufLen)
{
//-- Get a stream for reading the file
nsresult rv;
nsCOMPtr<nsIInputStream> manifestStream;
rv = GetInputStream(aFilename, getter_AddRefs(manifestStream));
if (NS_FAILED(rv)) return NS_ERROR_FILE_TARGET_DOES_NOT_EXIST;
//-- Read the manifest file into memory
char* buf;
PRUint32 len;
rv = manifestStream->Available(&len);
if (NS_FAILED(rv)) return rv;
if (len == PRUint32(-1))
return NS_ERROR_FILE_CORRUPTED; // bug 164695
buf = (char*)malloc(len+1);
if (!buf) return NS_ERROR_OUT_OF_MEMORY;
PRUint32 bytesRead;
rv = manifestStream->Read(buf, len, &bytesRead);
if (bytesRead != len)
rv = NS_ERROR_FILE_CORRUPTED;
if (NS_FAILED(rv)) {
free(buf);
return rv;
}
buf[len] = '\0'; //Null-terminate the buffer
*aBuf = buf;
if (aBufLen)
*aBufLen = len;
return NS_OK;
}
PRInt32
nsJAR::ReadLine(const char** src)
{
//--Moves pointer to beginning of next line and returns line length
// not including CR/LF.
PRInt32 length;
char* eol = PL_strpbrk(*src, "\r\n");
if (eol == nsnull) // Probably reached end of file before newline
{
length = PL_strlen(*src);
if (length == 0) // immediate end-of-file
*src = nsnull;
else // some data left on this line
*src += length;
}
else
{
length = eol - *src;
if (eol[0] == '\r' && eol[1] == '\n') // CR LF, so skip 2
*src = eol+2;
else // Either CR or LF, so skip 1
*src = eol+1;
}
return length;
}
//-- The following #defines are used by ParseManifest()
// and ParseOneFile(). The header strings are defined in the JAR specification.
#define JAR_MF 1
#define JAR_SF 2
#define JAR_MF_SEARCH_STRING "(M|/M)ETA-INF/(M|m)(ANIFEST|anifest).(MF|mf)$"
#define JAR_SF_SEARCH_STRING "(M|/M)ETA-INF/*.(SF|sf)$"
#define JAR_MF_HEADER (const char*)"Manifest-Version: 1.0"
#define JAR_SF_HEADER (const char*)"Signature-Version: 1.0"
nsresult
nsJAR::ParseManifest()
{
//-- Verification Step 1
if (mParsedManifest)
return NS_OK;
//-- (1)Manifest (MF) file
nsCOMPtr<nsIUTF8StringEnumerator> files;
nsresult rv = FindEntries(JAR_MF_SEARCH_STRING, getter_AddRefs(files));
if (!files) rv = NS_ERROR_FAILURE;
if (NS_FAILED(rv)) return rv;
//-- Load the file into memory
PRBool more;
rv = files->HasMore(&more);
NS_ENSURE_SUCCESS(rv, rv);
if (!more)
{
mGlobalStatus = JAR_NO_MANIFEST;
mParsedManifest = PR_TRUE;
return NS_OK;
}
nsCAutoString manifestFilename;
rv = files->GetNext(manifestFilename);
NS_ENSURE_SUCCESS(rv, rv);
// Check if there is more than one manifest, if so then error!
rv = files->HasMore(&more);
if (NS_FAILED(rv)) return rv;
if (more)
{
mParsedManifest = PR_TRUE;
return NS_ERROR_FILE_CORRUPTED; // More than one MF file
}
nsXPIDLCString manifestBuffer;
PRUint32 manifestLen;
rv = LoadEntry(manifestFilename.get(), getter_Copies(manifestBuffer), &manifestLen);
if (NS_FAILED(rv)) return rv;
//-- Parse it
rv = ParseOneFile(manifestBuffer, JAR_MF);
if (NS_FAILED(rv)) return rv;
//-- (2)Signature (SF) file
// If there are multiple signatures, we select one.
rv = FindEntries(JAR_SF_SEARCH_STRING, getter_AddRefs(files));
if (!files) rv = NS_ERROR_FAILURE;
if (NS_FAILED(rv)) return rv;
//-- Get an SF file
rv = files->HasMore(&more);
if (NS_FAILED(rv)) return rv;
if (!more)
{
mGlobalStatus = JAR_NO_MANIFEST;
mParsedManifest = PR_TRUE;
return NS_OK;
}
rv = files->GetNext(manifestFilename);
if (NS_FAILED(rv)) return rv;
rv = LoadEntry(manifestFilename.get(), getter_Copies(manifestBuffer), &manifestLen);
if (NS_FAILED(rv)) return rv;
//-- Get its corresponding signature file
nsCAutoString sigFilename(manifestFilename);
PRInt32 extension = sigFilename.RFindChar('.') + 1;
NS_ASSERTION(extension != 0, "Manifest Parser: Missing file extension.");
(void)sigFilename.Cut(extension, 2);
nsXPIDLCString sigBuffer;
PRUint32 sigLen;
{
nsCAutoString tempFilename(sigFilename); tempFilename.Append("rsa", 3);
rv = LoadEntry(tempFilename.get(), getter_Copies(sigBuffer), &sigLen);
}
if (NS_FAILED(rv))
{
nsCAutoString tempFilename(sigFilename); tempFilename.Append("RSA", 3);
rv = LoadEntry(tempFilename.get(), getter_Copies(sigBuffer), &sigLen);
}
if (NS_FAILED(rv))
{
mGlobalStatus = JAR_NO_MANIFEST;
mParsedManifest = PR_TRUE;
return NS_OK;
}
//-- Get the signature verifier service
nsCOMPtr<nsISignatureVerifier> verifier =
do_GetService(SIGNATURE_VERIFIER_CONTRACTID, &rv);
if (NS_FAILED(rv)) // No signature verifier available
{
mGlobalStatus = JAR_NO_MANIFEST;
mParsedManifest = PR_TRUE;
return NS_OK;
}
//-- Verify that the signature file is a valid signature of the SF file
PRInt32 verifyError;
rv = verifier->VerifySignature(sigBuffer, sigLen, manifestBuffer, manifestLen,
&verifyError, getter_AddRefs(mPrincipal));
if (NS_FAILED(rv)) return rv;
if (mPrincipal && verifyError == 0)
mGlobalStatus = JAR_VALID_MANIFEST;
else if (verifyError == nsISignatureVerifier::VERIFY_ERROR_UNKNOWN_CA)
mGlobalStatus = JAR_INVALID_UNKNOWN_CA;
else
mGlobalStatus = JAR_INVALID_SIG;
//-- Parse the SF file. If the verification above failed, principal
// is null, and ParseOneFile will mark the relevant entries as invalid.
// if ParseOneFile fails, then it has no effect, and we can safely
// continue to the next SF file, or return.
ParseOneFile(manifestBuffer, JAR_SF);
mParsedManifest = PR_TRUE;
return NS_OK;
}
nsresult
nsJAR::ParseOneFile(const char* filebuf, PRInt16 aFileType)
{
//-- Check file header
const char* nextLineStart = filebuf;
nsCAutoString curLine;
PRInt32 linelen;
linelen = ReadLine(&nextLineStart);
curLine.Assign(filebuf, linelen);
if ( ((aFileType == JAR_MF) && !curLine.Equals(JAR_MF_HEADER) ) ||
((aFileType == JAR_SF) && !curLine.Equals(JAR_SF_HEADER) ) )
return NS_ERROR_FILE_CORRUPTED;
//-- Skip header section
do {
linelen = ReadLine(&nextLineStart);
} while (linelen > 0);
//-- Set up parsing variables
const char* curPos;
const char* sectionStart = nextLineStart;
nsJARManifestItem* curItemMF = nsnull;
PRBool foundName = PR_FALSE;
if (aFileType == JAR_MF)
if (!(curItemMF = new nsJARManifestItem()))
return NS_ERROR_OUT_OF_MEMORY;
nsCAutoString curItemName;
nsCAutoString storedSectionDigest;
for(;;)
{
curPos = nextLineStart;
linelen = ReadLine(&nextLineStart);
curLine.Assign(curPos, linelen);
if (linelen == 0)
// end of section (blank line or end-of-file)
{
if (aFileType == JAR_MF)
{
mTotalItemsInManifest++;
if (curItemMF->mType != JAR_INVALID)
{
//-- Did this section have a name: line?
if(!foundName)
curItemMF->mType = JAR_INVALID;
else
{
//-- If it's an internal item, it must correspond
// to a valid jar entry
if (curItemMF->mType == JAR_INTERNAL)
{
PRBool exists;
nsresult rv = HasEntry(curItemName, &exists);
if (NS_FAILED(rv) || !exists)
curItemMF->mType = JAR_INVALID;
}
//-- Check for duplicates
nsCStringKey key(curItemName);
if (mManifestData.Exists(&key))
curItemMF->mType = JAR_INVALID;
}
}
if (curItemMF->mType == JAR_INVALID)
delete curItemMF;
else //-- calculate section digest
{
PRUint32 sectionLength = curPos - sectionStart;
CalculateDigest(sectionStart, sectionLength,
curItemMF->calculatedSectionDigest);
//-- Save item in the hashtable
nsCStringKey itemKey(curItemName);
mManifestData.Put(&itemKey, (void*)curItemMF);
}
if (nextLineStart == nsnull) // end-of-file
break;
sectionStart = nextLineStart;
if (!(curItemMF = new nsJARManifestItem()))
return NS_ERROR_OUT_OF_MEMORY;
} // (aFileType == JAR_MF)
else
//-- file type is SF, compare digest with calculated
// section digests from MF file.
{
if (foundName)
{
nsJARManifestItem* curItemSF;
nsCStringKey key(curItemName);
curItemSF = (nsJARManifestItem*)mManifestData.Get(&key);
if(curItemSF)
{
NS_ASSERTION(curItemSF->status == JAR_NOT_SIGNED,
"SECURITY ERROR: nsJARManifestItem not correctly initialized");
curItemSF->status = mGlobalStatus;
if (curItemSF->status == JAR_VALID_MANIFEST)
{ // Compare digests
if (storedSectionDigest.IsEmpty())
curItemSF->status = JAR_NOT_SIGNED;
else
{
if (!storedSectionDigest.Equals(curItemSF->calculatedSectionDigest))
curItemSF->status = JAR_INVALID_MANIFEST;
curItemSF->calculatedSectionDigest.Truncate();
storedSectionDigest.Truncate();
}
} // (aPrincipal != nsnull)
} // if(curItemSF)
} // if(foundName)
if(nextLineStart == nsnull) // end-of-file
break;
} // aFileType == JAR_SF
foundName = PR_FALSE;
continue;
} // if(linelen == 0)
//-- Look for continuations (beginning with a space) on subsequent lines
// and append them to the current line.
while(*nextLineStart == ' ')
{
curPos = nextLineStart;
PRInt32 continuationLen = ReadLine(&nextLineStart) - 1;
nsCAutoString continuation(curPos+1, continuationLen);
curLine += continuation;
linelen += continuationLen;
}
//-- Find colon in current line, this separates name from value
PRInt32 colonPos = curLine.FindChar(':');
if (colonPos == -1) // No colon on line, ignore line
continue;
//-- Break down the line
nsCAutoString lineName;
curLine.Left(lineName, colonPos);
nsCAutoString lineData;
curLine.Mid(lineData, colonPos+2, linelen - (colonPos+2));
//-- Lines to look for:
// (1) Digest:
if (lineName.LowerCaseEqualsLiteral("sha1-digest"))
//-- This is a digest line, save the data in the appropriate place
{
if(aFileType == JAR_MF)
curItemMF->storedEntryDigest = lineData;
else
storedSectionDigest = lineData;
continue;
}
// (2) Name: associates this manifest section with a file in the jar.
if (!foundName && lineName.LowerCaseEqualsLiteral("name"))
{
curItemName = lineData;
foundName = PR_TRUE;
continue;
}
// (3) Magic: this may be an inline Javascript.
// We can't do any other kind of magic.
if (aFileType == JAR_MF && lineName.LowerCaseEqualsLiteral("magic"))
{
if (lineData.LowerCaseEqualsLiteral("javascript"))
curItemMF->mType = JAR_EXTERNAL;
else
curItemMF->mType = JAR_INVALID;
continue;
}
} // for (;;)
return NS_OK;
} //ParseOneFile()
nsresult
nsJAR::VerifyEntry(nsJARManifestItem* aManItem, const char* aEntryData,
PRUint32 aLen)
{
if (aManItem->status == JAR_VALID_MANIFEST)
{
if (aManItem->storedEntryDigest.IsEmpty())
// No entry digests in manifest file. Entry is unsigned.
aManItem->status = JAR_NOT_SIGNED;
else
{ //-- Calculate and compare digests
nsCString calculatedEntryDigest;
nsresult rv = CalculateDigest(aEntryData, aLen, calculatedEntryDigest);
if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
if (!aManItem->storedEntryDigest.Equals(calculatedEntryDigest))
aManItem->status = JAR_INVALID_ENTRY;
aManItem->storedEntryDigest.Truncate();
}
}
aManItem->entryVerified = PR_TRUE;
return NS_OK;
}
void nsJAR::ReportError(const char* aFilename, PRInt16 errorCode)
{
//-- Generate error message
nsAutoString message;
message.AssignLiteral("Signature Verification Error: the signature on ");
if (aFilename)
message.AppendWithConversion(aFilename);
else
message.AppendLiteral("this .jar archive");
message.AppendLiteral(" is invalid because ");
switch(errorCode)
{
case JAR_NOT_SIGNED:
message.AppendLiteral("the archive did not contain a valid PKCS7 signature.");
break;
case JAR_INVALID_SIG:
message.AppendLiteral("the digital signature (*.RSA) file is not a valid signature of the signature instruction file (*.SF).");
break;
case JAR_INVALID_UNKNOWN_CA:
message.AppendLiteral("the certificate used to sign this file has an unrecognized issuer.");
break;
case JAR_INVALID_MANIFEST:
message.AppendLiteral("the signature instruction file (*.SF) does not contain a valid hash of the MANIFEST.MF file.");
break;
case JAR_INVALID_ENTRY:
message.AppendLiteral("the MANIFEST.MF file does not contain a valid hash of the file being verified.");
break;
case JAR_NO_MANIFEST:
message.AppendLiteral("the archive did not contain a manifest.");
break;
default:
message.AppendLiteral("of an unknown problem.");
}
// Report error in JS console
nsCOMPtr<nsIConsoleService> console(do_GetService("@mozilla.org/consoleservice;1"));
if (console)
{
console->LogStringMessage(message.get());
}
#ifdef DEBUG
char* messageCstr = ToNewCString(message);
if (!messageCstr) return;
fprintf(stderr, "%s\n", messageCstr);
nsMemory::Free(messageCstr);
#endif
}
nsresult nsJAR::CalculateDigest(const char* aInBuf, PRUint32 aLen,
nsCString& digest)
{
nsresult rv;
nsCOMPtr<nsICryptoHash> hasher = do_CreateInstance("@mozilla.org/security/hash;1", &rv);
if (NS_FAILED(rv)) return rv;
rv = hasher->Init(nsICryptoHash::SHA1);
if (NS_FAILED(rv)) return rv;
rv = hasher->Update((const PRUint8*) aInBuf, aLen);
if (NS_FAILED(rv)) return rv;
return hasher->Finish(PR_TRUE, digest);
}
NS_IMPL_THREADSAFE_ISUPPORTS1(nsJAREnumerator, nsIUTF8StringEnumerator)
//----------------------------------------------
// nsJAREnumerator::HasMore
//----------------------------------------------
NS_IMETHODIMP
nsJAREnumerator::HasMore(PRBool* aResult)
{
// try to get the next element
if (!mName) {
NS_ASSERTION(mFind, "nsJAREnumerator: Missing zipFind.");
nsresult rv = mFind->FindNext( &mName, &mNameLen );
if (rv == NS_ERROR_FILE_TARGET_DOES_NOT_EXIST) {
*aResult = PR_FALSE; // No more matches available
return NS_OK;
}
NS_ENSURE_SUCCESS(rv, NS_ERROR_FAILURE); // no error translation
}
*aResult = PR_TRUE;
return NS_OK;
}
//----------------------------------------------
// nsJAREnumerator::GetNext
//----------------------------------------------
NS_IMETHODIMP
nsJAREnumerator::GetNext(nsACString& aResult)
{
// check if the current item is "stale"
if (!mName) {
PRBool bMore;
nsresult rv = HasMore(&bMore);
if (NS_FAILED(rv) || !bMore)
return NS_ERROR_FAILURE; // no error translation
}
aResult.Assign(mName, mNameLen);
mName = 0; // we just gave this one away
return NS_OK;
}
NS_IMPL_THREADSAFE_ISUPPORTS1(nsJARItem, nsIZipEntry)
nsJARItem::nsJARItem(nsZipItem* aZipItem)
: mSize(aZipItem->Size()),
mRealsize(aZipItem->RealSize()),
mCrc32(aZipItem->CRC32()),
mLastModTime(aZipItem->LastModTime()),
mCompression(aZipItem->Compression()),
mIsDirectory(aZipItem->IsDirectory()),
mIsSynthetic(aZipItem->isSynthetic)
{
}
//------------------------------------------
// nsJARItem::GetCompression
//------------------------------------------
NS_IMETHODIMP
nsJARItem::GetCompression(PRUint16 *aCompression)
{
NS_ENSURE_ARG_POINTER(aCompression);
*aCompression = mCompression;
return NS_OK;
}
//------------------------------------------
// nsJARItem::GetSize
//------------------------------------------
NS_IMETHODIMP
nsJARItem::GetSize(PRUint32 *aSize)
{
NS_ENSURE_ARG_POINTER(aSize);
*aSize = mSize;
return NS_OK;
}
//------------------------------------------
// nsJARItem::GetRealSize
//------------------------------------------
NS_IMETHODIMP
nsJARItem::GetRealSize(PRUint32 *aRealsize)
{
NS_ENSURE_ARG_POINTER(aRealsize);
*aRealsize = mRealsize;
return NS_OK;
}
//------------------------------------------
// nsJARItem::GetCrc32
//------------------------------------------
NS_IMETHODIMP
nsJARItem::GetCRC32(PRUint32 *aCrc32)
{
NS_ENSURE_ARG_POINTER(aCrc32);
*aCrc32 = mCrc32;
return NS_OK;
}
//------------------------------------------
// nsJARItem::GetIsDirectory
//------------------------------------------
NS_IMETHODIMP
nsJARItem::GetIsDirectory(PRBool *aIsDirectory)
{
NS_ENSURE_ARG_POINTER(aIsDirectory);
*aIsDirectory = mIsDirectory;
return NS_OK;
}
//------------------------------------------
// nsJARItem::GetIsSynthetic
//------------------------------------------
NS_IMETHODIMP
nsJARItem::GetIsSynthetic(PRBool *aIsSynthetic)
{
NS_ENSURE_ARG_POINTER(aIsSynthetic);
*aIsSynthetic = mIsSynthetic;
return NS_OK;
}
//------------------------------------------
// nsJARItem::GetLastModifiedTime
//------------------------------------------
NS_IMETHODIMP
nsJARItem::GetLastModifiedTime(PRTime* aLastModTime)
{
NS_ENSURE_ARG_POINTER(aLastModTime);
*aLastModTime = mLastModTime;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
// nsIZipReaderCache
NS_IMPL_THREADSAFE_ISUPPORTS3(nsZipReaderCache, nsIZipReaderCache, nsIObserver, nsISupportsWeakReference)
nsZipReaderCache::nsZipReaderCache()
: mLock("nsZipReaderCache.mLock")
, mZips(16)
#ifdef ZIP_CACHE_HIT_RATE
,
mZipCacheLookups(0),
mZipCacheHits(0),
mZipCacheFlushes(0),
mZipSyncMisses(0)
#endif
{
}
NS_IMETHODIMP
nsZipReaderCache::Init(PRUint32 cacheSize)
{
mCacheSize = cacheSize;
// Register as a memory pressure observer
nsCOMPtr<nsIObserverService> os =
do_GetService("@mozilla.org/observer-service;1");
if (os)
{
os->AddObserver(this, "memory-pressure", PR_TRUE);
os->AddObserver(this, "chrome-flush-caches", PR_TRUE);
os->AddObserver(this, "flush-cache-entry", PR_TRUE);
}
// ignore failure of the observer registration.
return NS_OK;
}
static PRBool
DropZipReaderCache(nsHashKey *aKey, void *aData, void* closure)
{
nsJAR* zip = (nsJAR*)aData;
zip->SetZipReaderCache(nsnull);
return PR_TRUE;
}
nsZipReaderCache::~nsZipReaderCache()
{
mZips.Enumerate(DropZipReaderCache, nsnull);
#ifdef ZIP_CACHE_HIT_RATE
printf("nsZipReaderCache size=%d hits=%d lookups=%d rate=%f%% flushes=%d missed %d\n",
mCacheSize, mZipCacheHits, mZipCacheLookups,
(float)mZipCacheHits / mZipCacheLookups,
mZipCacheFlushes, mZipSyncMisses);
#endif
}
NS_IMETHODIMP
nsZipReaderCache::GetZip(nsIFile* zipFile, nsIZipReader* *result)
{
NS_ENSURE_ARG_POINTER(zipFile);
nsresult rv;
nsCOMPtr<nsIZipReader> antiLockZipGrip;
MutexAutoLock lock(mLock);
#ifdef ZIP_CACHE_HIT_RATE
mZipCacheLookups++;
#endif
nsCAutoString uri;
rv = zipFile->GetNativePath(uri);
if (NS_FAILED(rv)) return rv;
uri.Insert(NS_LITERAL_CSTRING("file:"), 0);
nsCStringKey key(uri);
nsJAR* zip = static_cast<nsJAR*>(static_cast<nsIZipReader*>(mZips.Get(&key))); // AddRefs
if (zip) {
#ifdef ZIP_CACHE_HIT_RATE
mZipCacheHits++;
#endif
zip->ClearReleaseTime();
}
else {
zip = new nsJAR();
if (zip == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(zip);
zip->SetZipReaderCache(this);
rv = zip->Open(zipFile);
if (NS_FAILED(rv)) {
NS_RELEASE(zip);
return rv;
}
#ifdef DEBUG
PRBool collision =
#endif
mZips.Put(&key, static_cast<nsIZipReader*>(zip)); // AddRefs to 2
NS_ASSERTION(!collision, "horked");
}
*result = zip;
return rv;
}
NS_IMETHODIMP
nsZipReaderCache::GetInnerZip(nsIFile* zipFile, const char *entry,
nsIZipReader* *result)
{
NS_ENSURE_ARG_POINTER(zipFile);
nsCOMPtr<nsIZipReader> outerZipReader;
nsresult rv = GetZip(zipFile, getter_AddRefs(outerZipReader));
NS_ENSURE_SUCCESS(rv, rv);
#ifdef ZIP_CACHE_HIT_RATE
mZipCacheLookups++;
#endif
nsCAutoString uri;
rv = zipFile->GetNativePath(uri);
if (NS_FAILED(rv)) return rv;
uri.Insert(NS_LITERAL_CSTRING("jar:"), 0);
uri.AppendLiteral("!/");
uri.Append(entry);
nsCStringKey key(uri);
nsJAR* zip = static_cast<nsJAR*>(static_cast<nsIZipReader*>(mZips.Get(&key))); // AddRefs
if (zip) {
#ifdef ZIP_CACHE_HIT_RATE
mZipCacheHits++;
#endif
zip->ClearReleaseTime();
}
else {
zip = new nsJAR();
NS_ADDREF(zip);
zip->SetZipReaderCache(this);
rv = zip->OpenInner(outerZipReader, entry);
if (NS_FAILED(rv)) {
NS_RELEASE(zip);
return rv;
}
#ifdef DEBUG
PRBool collision =
#endif
mZips.Put(&key, static_cast<nsIZipReader*>(zip)); // AddRefs to 2
NS_ASSERTION(!collision, "horked");
}
*result = zip;
return rv;
}
static PRBool
FindOldestZip(nsHashKey *aKey, void *aData, void* closure)
{
nsJAR** oldestPtr = (nsJAR**)closure;
nsJAR* oldest = *oldestPtr;
nsJAR* current = (nsJAR*)aData;
PRIntervalTime currentReleaseTime = current->GetReleaseTime();
if (currentReleaseTime != PR_INTERVAL_NO_TIMEOUT) {
if (oldest == nsnull ||
currentReleaseTime < oldest->GetReleaseTime()) {
*oldestPtr = current;
}
}
return PR_TRUE;
}
struct ZipFindData {nsJAR* zip; PRBool found;};
static PRBool
FindZip(nsHashKey *aKey, void *aData, void* closure)
{
ZipFindData* find_data = (ZipFindData*)closure;
if (find_data->zip == (nsJAR*)aData) {
find_data->found = PR_TRUE;
return PR_FALSE;
}
return PR_TRUE;
}
nsresult
nsZipReaderCache::ReleaseZip(nsJAR* zip)
{
nsresult rv;
MutexAutoLock lock(mLock);
// It is possible that two thread compete for this zip. The dangerous
// case is where one thread Releases the zip and discovers that the ref
// count has gone to one. Before it can call this ReleaseZip method
// another thread calls our GetZip method. The ref count goes to two. That
// second thread then Releases the zip and the ref count goes to one. It
// then tries to enter this ReleaseZip method and blocks while the first
// thread is still here. The first thread continues and remove the zip from
// the cache and calls its Release method sending the ref count to 0 and
// deleting the zip. However, the second thread is still blocked at the
// start of ReleaseZip, but the 'zip' param now hold a reference to a
// deleted zip!
//
// So, we are going to try safeguarding here by searching our hashtable while
// locked here for the zip. We return fast if it is not found.
ZipFindData find_data = {zip, PR_FALSE};
mZips.Enumerate(FindZip, &find_data);
if (!find_data.found) {
#ifdef ZIP_CACHE_HIT_RATE
mZipSyncMisses++;
#endif
return NS_OK;
}
zip->SetReleaseTime();
if (mZips.Count() <= mCacheSize)
return NS_OK;
nsJAR* oldest = nsnull;
mZips.Enumerate(FindOldestZip, &oldest);
// Because of the craziness above it is possible that there is no zip that
// needs removing.
if (!oldest)
return NS_OK;
#ifdef ZIP_CACHE_HIT_RATE
mZipCacheFlushes++;
#endif
// remove from hashtable
nsCAutoString uri;
rv = oldest->GetJarPath(uri);
if (NS_FAILED(rv))
return rv;
if (oldest->mOuterZipEntry.IsEmpty()) {
uri.Insert(NS_LITERAL_CSTRING("file:"), 0);
} else {
uri.Insert(NS_LITERAL_CSTRING("jar:"), 0);
uri.AppendLiteral("!/");
uri.Append(oldest->mOuterZipEntry);
}
nsCStringKey key(uri);
nsRefPtr<nsJAR> removed;
mZips.Remove(&key, (nsISupports **)removed.StartAssignment());
NS_ASSERTION(removed, "botched");
NS_ASSERTION(oldest == removed, "removed wrong entry");
if (removed)
removed->SetZipReaderCache(nsnull);
return NS_OK;
}
static PRBool
FindFlushableZip(nsHashKey *aKey, void *aData, void* closure)
{
nsHashKey** flushableKeyPtr = (nsHashKey**)closure;
nsJAR* current = (nsJAR*)aData;
if (current->GetReleaseTime() != PR_INTERVAL_NO_TIMEOUT) {
*flushableKeyPtr = aKey;
current->SetZipReaderCache(nsnull);
return PR_FALSE;
}
return PR_TRUE;
}
NS_IMETHODIMP
nsZipReaderCache::Observe(nsISupports *aSubject,
const char *aTopic,
const PRUnichar *aSomeData)
{
if (strcmp(aTopic, "memory-pressure") == 0) {
MutexAutoLock lock(mLock);
while (PR_TRUE) {
nsHashKey* flushable = nsnull;
mZips.Enumerate(FindFlushableZip, &flushable);
if ( ! flushable )
break;
#ifdef DEBUG
PRBool removed =
#endif
mZips.Remove(flushable); // Releases
NS_ASSERTION(removed, "botched");
#ifdef xDEBUG_jband
printf("flushed something from the jar cache\n");
#endif
}
}
else if (strcmp(aTopic, "chrome-flush-caches") == 0) {
mZips.Enumerate(DropZipReaderCache, nsnull);
mZips.Reset();
}
else if (strcmp(aTopic, "flush-cache-entry") == 0) {
nsCOMPtr<nsIFile> file = do_QueryInterface(aSubject);
if (!file)
return NS_OK;
nsCAutoString uri;
if (NS_FAILED(file->GetNativePath(uri)))
return NS_OK;
uri.Insert(NS_LITERAL_CSTRING("file:"), 0);
nsCStringKey key(uri);
MutexAutoLock lock(mLock);
nsJAR* zip = static_cast<nsJAR*>(static_cast<nsIZipReader*>(mZips.Get(&key)));
if (!zip)
return NS_OK;
#ifdef ZIP_CACHE_HIT_RATE
mZipCacheFlushes++;
#endif
zip->SetZipReaderCache(nsnull);
mZips.Remove(&key);
NS_RELEASE(zip);
}
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
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