mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
388 lines
11 KiB
C++
388 lines
11 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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*/
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#include "StreamFunctions.h"
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#include "nsZipHeader.h"
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#include "nsMemory.h"
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#include "prtime.h"
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#define ZIP_FILE_HEADER_SIGNATURE 0x04034b50
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#define ZIP_FILE_HEADER_SIZE 30
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#define ZIP_CDS_HEADER_SIGNATURE 0x02014b50
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#define ZIP_CDS_HEADER_SIZE 46
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#define FLAGS_IS_UTF8 0x800
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#define ZIP_EXTENDED_TIMESTAMP_FIELD 0x5455
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#define ZIP_EXTENDED_TIMESTAMP_MODTIME 0x01
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/**
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* nsZipHeader represents an entry from a zip file.
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*/
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NS_IMPL_ISUPPORTS(nsZipHeader, nsIZipEntry)
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NS_IMETHODIMP nsZipHeader::GetCompression(uint16_t *aCompression)
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{
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NS_ASSERTION(mInited, "Not initalised");
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*aCompression = mMethod;
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return NS_OK;
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}
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NS_IMETHODIMP nsZipHeader::GetSize(uint32_t *aSize)
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{
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NS_ASSERTION(mInited, "Not initalised");
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*aSize = mCSize;
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return NS_OK;
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}
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NS_IMETHODIMP nsZipHeader::GetRealSize(uint32_t *aRealSize)
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{
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NS_ASSERTION(mInited, "Not initalised");
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*aRealSize = mUSize;
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return NS_OK;
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}
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NS_IMETHODIMP nsZipHeader::GetCRC32(uint32_t *aCRC32)
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{
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NS_ASSERTION(mInited, "Not initalised");
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*aCRC32 = mCRC;
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return NS_OK;
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}
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NS_IMETHODIMP nsZipHeader::GetIsDirectory(bool *aIsDirectory)
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{
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NS_ASSERTION(mInited, "Not initalised");
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if (mName.Last() == '/')
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*aIsDirectory = true;
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else
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*aIsDirectory = false;
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return NS_OK;
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}
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NS_IMETHODIMP nsZipHeader::GetLastModifiedTime(PRTime *aLastModifiedTime)
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{
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NS_ASSERTION(mInited, "Not initalised");
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// Try to read timestamp from extra field
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uint16_t blocksize;
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const uint8_t *tsField = GetExtraField(ZIP_EXTENDED_TIMESTAMP_FIELD, false, &blocksize);
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if (tsField && blocksize >= 5) {
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uint32_t pos = 4;
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uint8_t flags;
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flags = READ8(tsField, &pos);
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if (flags & ZIP_EXTENDED_TIMESTAMP_MODTIME) {
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*aLastModifiedTime = (PRTime)(READ32(tsField, &pos))
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* PR_USEC_PER_SEC;
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return NS_OK;
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}
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}
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// Use DOS date/time fields
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// Note that on DST shift we can't handle correctly the hour that is valid
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// in both DST zones
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PRExplodedTime time;
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time.tm_usec = 0;
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time.tm_hour = (mTime >> 11) & 0x1F;
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time.tm_min = (mTime >> 5) & 0x3F;
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time.tm_sec = (mTime & 0x1F) * 2;
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time.tm_year = (mDate >> 9) + 1980;
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time.tm_month = ((mDate >> 5) & 0x0F) - 1;
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time.tm_mday = mDate & 0x1F;
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time.tm_params.tp_gmt_offset = 0;
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time.tm_params.tp_dst_offset = 0;
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PR_NormalizeTime(&time, PR_GMTParameters);
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time.tm_params.tp_gmt_offset = PR_LocalTimeParameters(&time).tp_gmt_offset;
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PR_NormalizeTime(&time, PR_GMTParameters);
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time.tm_params.tp_dst_offset = PR_LocalTimeParameters(&time).tp_dst_offset;
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*aLastModifiedTime = PR_ImplodeTime(&time);
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return NS_OK;
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}
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NS_IMETHODIMP nsZipHeader::GetIsSynthetic(bool *aIsSynthetic)
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{
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NS_ASSERTION(mInited, "Not initalised");
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*aIsSynthetic = false;
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return NS_OK;
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}
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NS_IMETHODIMP nsZipHeader::GetPermissions(uint32_t *aPermissions)
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{
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NS_ASSERTION(mInited, "Not initalised");
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// Always give user read access at least, this matches nsIZipReader's behaviour
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*aPermissions = ((mEAttr >> 16) & 0xfff) | 0x100;
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return NS_OK;
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}
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void nsZipHeader::Init(const nsACString & aPath, PRTime aDate, uint32_t aAttr,
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uint32_t aOffset)
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{
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NS_ASSERTION(!mInited, "Already initalised");
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PRExplodedTime time;
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PR_ExplodeTime(aDate, PR_LocalTimeParameters, &time);
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mTime = time.tm_sec / 2 + (time.tm_min << 5) + (time.tm_hour << 11);
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mDate = time.tm_mday + ((time.tm_month + 1) << 5) +
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((time.tm_year - 1980) << 9);
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// Store modification timestamp as extra field
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// First fill CDS extra field
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mFieldLength = 9;
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mExtraField = new uint8_t[mFieldLength];
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if (!mExtraField) {
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mFieldLength = 0;
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} else {
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uint32_t pos = 0;
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WRITE16(mExtraField.get(), &pos, ZIP_EXTENDED_TIMESTAMP_FIELD);
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WRITE16(mExtraField.get(), &pos, 5);
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WRITE8(mExtraField.get(), &pos, ZIP_EXTENDED_TIMESTAMP_MODTIME);
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WRITE32(mExtraField.get(), &pos, aDate / PR_USEC_PER_SEC);
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// Fill local extra field
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mLocalExtraField = new uint8_t[mFieldLength];
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if (mLocalExtraField) {
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mLocalFieldLength = mFieldLength;
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memcpy(mLocalExtraField.get(), mExtraField.get(), mLocalFieldLength);
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}
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}
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mEAttr = aAttr;
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mOffset = aOffset;
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mName = aPath;
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mComment = NS_LITERAL_CSTRING("");
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// Claim a UTF-8 path in case it needs it.
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mFlags |= FLAGS_IS_UTF8;
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mInited = true;
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}
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uint32_t nsZipHeader::GetFileHeaderLength()
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{
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return ZIP_FILE_HEADER_SIZE + mName.Length() + mLocalFieldLength;
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}
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nsresult nsZipHeader::WriteFileHeader(nsIOutputStream *aStream)
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{
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NS_ASSERTION(mInited, "Not initalised");
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uint8_t buf[ZIP_FILE_HEADER_SIZE];
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uint32_t pos = 0;
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WRITE32(buf, &pos, ZIP_FILE_HEADER_SIGNATURE);
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WRITE16(buf, &pos, mVersionNeeded);
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WRITE16(buf, &pos, mFlags);
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WRITE16(buf, &pos, mMethod);
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WRITE16(buf, &pos, mTime);
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WRITE16(buf, &pos, mDate);
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WRITE32(buf, &pos, mCRC);
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WRITE32(buf, &pos, mCSize);
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WRITE32(buf, &pos, mUSize);
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WRITE16(buf, &pos, mName.Length());
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WRITE16(buf, &pos, mLocalFieldLength);
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nsresult rv = ZW_WriteData(aStream, (const char *)buf, pos);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = ZW_WriteData(aStream, mName.get(), mName.Length());
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NS_ENSURE_SUCCESS(rv, rv);
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if (mLocalFieldLength)
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{
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rv = ZW_WriteData(aStream, (const char *)mLocalExtraField.get(), mLocalFieldLength);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return NS_OK;
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}
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uint32_t nsZipHeader::GetCDSHeaderLength()
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{
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return ZIP_CDS_HEADER_SIZE + mName.Length() + mComment.Length() +
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mFieldLength;
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}
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nsresult nsZipHeader::WriteCDSHeader(nsIOutputStream *aStream)
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{
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NS_ASSERTION(mInited, "Not initalised");
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uint8_t buf[ZIP_CDS_HEADER_SIZE];
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uint32_t pos = 0;
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WRITE32(buf, &pos, ZIP_CDS_HEADER_SIGNATURE);
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WRITE16(buf, &pos, mVersionMade);
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WRITE16(buf, &pos, mVersionNeeded);
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WRITE16(buf, &pos, mFlags);
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WRITE16(buf, &pos, mMethod);
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WRITE16(buf, &pos, mTime);
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WRITE16(buf, &pos, mDate);
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WRITE32(buf, &pos, mCRC);
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WRITE32(buf, &pos, mCSize);
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WRITE32(buf, &pos, mUSize);
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WRITE16(buf, &pos, mName.Length());
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WRITE16(buf, &pos, mFieldLength);
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WRITE16(buf, &pos, mComment.Length());
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WRITE16(buf, &pos, mDisk);
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WRITE16(buf, &pos, mIAttr);
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WRITE32(buf, &pos, mEAttr);
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WRITE32(buf, &pos, mOffset);
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nsresult rv = ZW_WriteData(aStream, (const char *)buf, pos);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = ZW_WriteData(aStream, mName.get(), mName.Length());
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NS_ENSURE_SUCCESS(rv, rv);
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if (mExtraField) {
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rv = ZW_WriteData(aStream, (const char *)mExtraField.get(), mFieldLength);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return ZW_WriteData(aStream, mComment.get(), mComment.Length());
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}
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nsresult nsZipHeader::ReadCDSHeader(nsIInputStream *stream)
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{
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NS_ASSERTION(!mInited, "Already initalised");
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uint8_t buf[ZIP_CDS_HEADER_SIZE];
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nsresult rv = ZW_ReadData(stream, (char *)buf, ZIP_CDS_HEADER_SIZE);
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NS_ENSURE_SUCCESS(rv, rv);
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uint32_t pos = 0;
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uint32_t signature = READ32(buf, &pos);
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if (signature != ZIP_CDS_HEADER_SIGNATURE)
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return NS_ERROR_FILE_CORRUPTED;
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mVersionMade = READ16(buf, &pos);
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mVersionNeeded = READ16(buf, &pos);
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mFlags = READ16(buf, &pos);
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mMethod = READ16(buf, &pos);
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mTime = READ16(buf, &pos);
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mDate = READ16(buf, &pos);
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mCRC = READ32(buf, &pos);
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mCSize = READ32(buf, &pos);
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mUSize = READ32(buf, &pos);
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uint16_t namelength = READ16(buf, &pos);
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mFieldLength = READ16(buf, &pos);
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uint16_t commentlength = READ16(buf, &pos);
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mDisk = READ16(buf, &pos);
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mIAttr = READ16(buf, &pos);
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mEAttr = READ32(buf, &pos);
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mOffset = READ32(buf, &pos);
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if (namelength > 0) {
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nsAutoArrayPtr<char> field(new char[namelength]);
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NS_ENSURE_TRUE(field, NS_ERROR_OUT_OF_MEMORY);
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rv = ZW_ReadData(stream, field.get(), namelength);
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NS_ENSURE_SUCCESS(rv, rv);
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mName.Assign(field, namelength);
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}
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else
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mName = NS_LITERAL_CSTRING("");
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if (mFieldLength > 0) {
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mExtraField = new uint8_t[mFieldLength];
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NS_ENSURE_TRUE(mExtraField, NS_ERROR_OUT_OF_MEMORY);
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rv = ZW_ReadData(stream, (char *)mExtraField.get(), mFieldLength);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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if (commentlength > 0) {
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nsAutoArrayPtr<char> field(new char[commentlength]);
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NS_ENSURE_TRUE(field, NS_ERROR_OUT_OF_MEMORY);
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rv = ZW_ReadData(stream, field.get(), commentlength);
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NS_ENSURE_SUCCESS(rv, rv);
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mComment.Assign(field, commentlength);
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}
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else
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mComment = NS_LITERAL_CSTRING("");
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mInited = true;
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return NS_OK;
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}
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const uint8_t * nsZipHeader::GetExtraField(uint16_t aTag, bool aLocal, uint16_t *aBlockSize)
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{
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const uint8_t *buf = aLocal ? mLocalExtraField : mExtraField;
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uint32_t buflen = aLocal ? mLocalFieldLength : mFieldLength;
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uint32_t pos = 0;
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uint16_t tag, blocksize;
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while (buf && (pos + 4) <= buflen) {
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tag = READ16(buf, &pos);
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blocksize = READ16(buf, &pos);
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if (aTag == tag && (pos + blocksize) <= buflen) {
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*aBlockSize = blocksize;
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return buf + pos - 4;
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}
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pos += blocksize;
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}
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return nullptr;
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}
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/*
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* Pad extra field to align data starting position to specified size.
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*/
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nsresult nsZipHeader::PadExtraField(uint32_t aOffset, uint16_t aAlignSize)
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{
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uint32_t pad_size;
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uint32_t pa_offset;
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uint32_t pa_end;
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// Check for range and power of 2.
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if (aAlignSize < 2 || aAlignSize > 32768 ||
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(aAlignSize & (aAlignSize - 1)) != 0) {
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return NS_ERROR_INVALID_ARG;
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}
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// Point to current starting data position.
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aOffset += ZIP_FILE_HEADER_SIZE + mName.Length() + mLocalFieldLength;
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// Calculate aligned offset.
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pa_offset = aOffset & ~(aAlignSize - 1);
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pa_end = pa_offset + aAlignSize;
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pad_size = pa_end - aOffset;
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if (pad_size == 0) {
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return NS_OK;
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}
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// Leave enough room(at least 4 bytes) for valid values in extra field.
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while (pad_size < 4) {
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pad_size += aAlignSize;
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}
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// Extra field length is 2 bytes.
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if (mLocalFieldLength + pad_size > 65535) {
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return NS_ERROR_FAILURE;
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}
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nsAutoArrayPtr<uint8_t> field = mLocalExtraField;
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uint32_t pos = mLocalFieldLength;
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mLocalExtraField = new uint8_t[mLocalFieldLength + pad_size];
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memcpy(mLocalExtraField.get(), field, mLocalFieldLength);
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// Use 0xFFFF as tag ID to avoid conflict with other IDs.
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// For more information, please read "Extensible data fields" section in:
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// http://www.pkware.com/documents/casestudies/APPNOTE.TXT
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WRITE16(mLocalExtraField.get(), &pos, 0xFFFF);
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WRITE16(mLocalExtraField.get(), &pos, pad_size - 4);
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memset(mLocalExtraField.get() + pos, 0, pad_size - 4);
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mLocalFieldLength += pad_size;
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return NS_OK;
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}
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