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gecko/modules/libjar/nsJAR.cpp

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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"
#ifdef XP_UNIX
#include <sys/stat.h>
#elif defined (XP_WIN) || defined(XP_OS2)
#include <io.h>
#endif
//----------------------------------------------
// 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(): mManifestData(nsnull, nsnull, DeleteManifestEntry, nsnull, 10),
mParsedManifest(PR_FALSE),
mGlobalStatus(JAR_MANIFEST_NOT_PARSED),
mReleaseTime(PR_INTERVAL_NO_TIMEOUT),
mCache(nsnull),
mLock(nsnull),
mTotalItemsInManifest(0)
{
}
nsJAR::~nsJAR()
{
Close();
}
NS_IMPL_THREADSAFE_QUERY_INTERFACE2(nsJAR, nsIZipReader, nsIJAR)
NS_IMPL_THREADSAFE_ADDREF(nsJAR)
// Custom Release method works with nsZipReaderCache...
nsrefcnt nsJAR::Release(void)
{
nsrefcnt count;
NS_PRECONDITION(0 != mRefCnt, "dup release");
count = PR_AtomicDecrement((PRInt32 *)&mRefCnt);
NS_LOG_RELEASE(this, count, "nsJAR");
if (0 == count) {
mRefCnt = 1; /* stabilize */
/* enable this to find non-threadsafe destructors: */
/* NS_ASSERT_OWNINGTHREAD(nsJAR); */
NS_DELETEXPCOM(this);
return 0;
}
else if (1 == count && mCache) {
nsresult rv = 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 (mLock) return NS_ERROR_FAILURE; // Already open!
mZipFile = zipFile;
mLock = PR_NewLock();
NS_ENSURE_TRUE(mLock, NS_ERROR_OUT_OF_MEMORY);
return mZip.OpenArchive(zipFile);
}
NS_IMETHODIMP
nsJAR::GetFile(nsIFile* *result)
{
*result = mZipFile;
NS_IF_ADDREF(*result);
return NS_OK;
}
NS_IMETHODIMP
nsJAR::Close()
{
if (mLock) {
PR_DestroyLock(mLock);
mLock = nsnull;
}
mParsedManifest = PR_FALSE;
mManifestData.Reset();
mGlobalStatus = JAR_MANIFEST_NOT_PARSED;
mTotalItemsInManifest = 0;
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
nsAutoLock 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;
}
//----------------------------------------------
// nsIJAR implementation
//----------------------------------------------
NS_IMETHODIMP
nsJAR::GetCertificatePrincipal(const char* aFilename, nsIPrincipal** aPrincipal)
{
//-- Parameter check
if (!aPrincipal)
return NS_ERROR_NULL_POINTER;
*aPrincipal = nsnull;
//-- 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*)PR_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)) {
PR_FREEIF(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(nsnull),
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);
}
// ignore failure of the observer registration.
mLock = PR_NewLock();
return mLock ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
static PRBool
DropZipReaderCache(nsHashKey *aKey, void *aData, void* closure)
{
nsJAR* zip = (nsJAR*)aData;
zip->SetZipReaderCache(nsnull);
return PR_TRUE;
}
nsZipReaderCache::~nsZipReaderCache()
{
if (mLock)
PR_DestroyLock(mLock);
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<nsIJAR> antiLockZipGrip;
nsAutoLock lock(mLock);
#ifdef ZIP_CACHE_HIT_RATE
mZipCacheLookups++;
#endif
nsCAutoString path;
rv = zipFile->GetNativePath(path);
if (NS_FAILED(rv)) return rv;
nsCStringKey key(path);
nsJAR* zip = static_cast<nsJAR*>(static_cast<nsIZipReader*>(mZips.Get(&key))); // AddRefs
if (zip) {
#ifdef ZIP_CACHE_HIT_RATE
mZipCacheHits++;
#endif
zip->ClearReleaseTime();
}
else {
if (zip) {
antiLockZipGrip = zip;
mZips.Remove(&key);
}
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;
}
PRBool collision = 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;
nsAutoLock 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
// Clear the cache pointer in case we gave out this oldest guy while
// his Release call was being made. Otherwise we could nest on ReleaseZip
// when the second owner calls Release and we are still here in this lock.
oldest->SetZipReaderCache(nsnull);
// remove from hashtable
nsCAutoString path;
rv = oldest->GetJarPath(path);
if (NS_FAILED(rv)) return rv;
nsCStringKey key(path);
PRBool removed = mZips.Remove(&key); // Releases
NS_ASSERTION(removed, "botched");
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) {
nsAutoLock lock(mLock);
while (PR_TRUE) {
nsHashKey* flushable = nsnull;
mZips.Enumerate(FindFlushableZip, &flushable);
if ( ! flushable )
break;
PRBool removed = 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();
}
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
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