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Diffstat (limited to '')
| -rw-r--r-- | src/VBox/Runtime/common/zip/pkzip.cpp | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/zip/pkzip.cpp b/src/VBox/Runtime/common/zip/pkzip.cpp new file mode 100644 index 00000000..7b3806e5 --- /dev/null +++ b/src/VBox/Runtime/common/zip/pkzip.cpp @@ -0,0 +1,248 @@ +/* $Id: pkzip.cpp $ */ +/** @file + * IPRT - PKZIP archive I/O. + */ + +/* + * Copyright (C) 2014-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/zip.h> + +#include <iprt/file.h> +#include <iprt/err.h> +#include <iprt/fs.h> +#include <iprt/mem.h> +#include <iprt/string.h> +#include <iprt/vfs.h> +#include <iprt/vfslowlevel.h> + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** + * Memory stream private data. + */ +typedef struct MEMIOSTREAM +{ + /** Size of the memory buffer. */ + size_t cbBuf; + /** Pointer to the memory buffer. */ + uint8_t *pu8Buf; + /** Current offset. */ + size_t off; +} MEMIOSTREAM; +typedef MEMIOSTREAM *PMEMIOSTREAM; + + +/** + * @interface_method_impl{RTVFSOBJOPS,pfnClose} + */ +static DECLCALLBACK(int) memFssIos_Close(void *pvThis) +{ + NOREF(pvThis); + return VINF_SUCCESS; +} + +/** + * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo} + */ +static DECLCALLBACK(int) memFssIos_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr) +{ + PMEMIOSTREAM pThis = (PMEMIOSTREAM)pvThis; + switch (enmAddAttr) + { + case RTFSOBJATTRADD_NOTHING: + case RTFSOBJATTRADD_UNIX: + RT_ZERO(*pObjInfo); + pObjInfo->cbObject = pThis->cbBuf; + break; + default: + return VERR_NOT_SUPPORTED; + } + return VINF_SUCCESS; +} + +/** + * @interface_method_impl{RTVFSIOSTREAMOPS,pfnRead} + */ +static DECLCALLBACK(int) memFssIos_Read(void *pvThis, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead) +{ + PMEMIOSTREAM pThis = (PMEMIOSTREAM)pvThis; + Assert(pSgBuf->cSegs == 1); + RT_NOREF_PV(fBlocking); + + if (off < 0) + off = pThis->off; + if (off >= (RTFOFF)pThis->cbBuf) + return pcbRead ? VINF_EOF : VERR_EOF; + + size_t cbLeft = pThis->cbBuf - off; + size_t cbToRead = pSgBuf->paSegs[0].cbSeg; + if (cbToRead > cbLeft) + { + if (!pcbRead) + return VERR_EOF; + cbToRead = (size_t)cbLeft; + } + + memcpy(pSgBuf->paSegs[0].pvSeg, pThis->pu8Buf + off, cbToRead); + pThis->off = off + cbToRead; + if (pcbRead) + *pcbRead = cbToRead; + + return VINF_SUCCESS; +} + +/** + * @interface_method_impl{RTVFSIOSTREAMOPS,pfnWrite} + */ +static DECLCALLBACK(int) memFssIos_Write(void *pvThis, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten) +{ + RT_NOREF_PV(pvThis); RT_NOREF_PV(off); RT_NOREF_PV(pSgBuf); RT_NOREF_PV(fBlocking); RT_NOREF_PV(pcbWritten); + return VERR_NOT_IMPLEMENTED; +} + +/** + * @interface_method_impl{RTVFSIOSTREAMOPS,pfnFlush} + */ +static DECLCALLBACK(int) memFssIos_Flush(void *pvThis) +{ + RT_NOREF_PV(pvThis); + return VERR_NOT_IMPLEMENTED; +} + +/** + * @interface_method_impl{RTVFSIOSTREAMOPS,pfnPollOne} + */ +static DECLCALLBACK(int) memFssIos_PollOne(void *pvThis, uint32_t fEvents, RTMSINTERVAL cMillies, bool fIntr, uint32_t *pfRetEvents) +{ + RT_NOREF_PV(pvThis); RT_NOREF_PV(fEvents); RT_NOREF_PV(cMillies); RT_NOREF_PV(fIntr); RT_NOREF_PV(pfRetEvents); + return VERR_NOT_IMPLEMENTED; +} + +/** + * @interface_method_impl{RTVFSIOSTREAMOPS,pfnTell} + */ +static DECLCALLBACK(int) memFssIos_Tell(void *pvThis, PRTFOFF poffActual) +{ + PMEMIOSTREAM pThis = (PMEMIOSTREAM)pvThis; + *poffActual = pThis->off; + return VINF_SUCCESS; +} + +/** + * Memory I/O object stream operations. + */ +static const RTVFSIOSTREAMOPS g_memFssIosOps = +{ + { /* Obj */ + RTVFSOBJOPS_VERSION, + RTVFSOBJTYPE_IO_STREAM, + "MemFsStream::IoStream", + memFssIos_Close, + memFssIos_QueryInfo, + RTVFSOBJOPS_VERSION + }, + RTVFSIOSTREAMOPS_VERSION, + RTVFSIOSTREAMOPS_FEAT_NO_SG, + memFssIos_Read, + memFssIos_Write, + memFssIos_Flush, + memFssIos_PollOne, + memFssIos_Tell, + NULL /*Skip*/, + NULL /*ZeroFill*/, + RTVFSIOSTREAMOPS_VERSION +}; + +RTDECL(int) RTZipPkzipMemDecompress(void **ppvDst, size_t *pcbDst, const void *pvSrc, size_t cbSrc, const char *pszObject) +{ + PMEMIOSTREAM pIosData; + RTVFSIOSTREAM hVfsIos; + int rc = RTVfsNewIoStream(&g_memFssIosOps, + sizeof(*pIosData), + RTFILE_O_READ | RTFILE_O_DENY_WRITE | RTFILE_O_OPEN, + NIL_RTVFS, + NIL_RTVFSLOCK, + &hVfsIos, + (void **)&pIosData); + if (RT_SUCCESS(rc)) + { + pIosData->pu8Buf = (uint8_t*)pvSrc; + pIosData->cbBuf = cbSrc; + pIosData->off = 0; + RTVFSFSSTREAM hVfsFss; + rc = RTZipPkzipFsStreamFromIoStream(hVfsIos, 0 /*fFlags*/, &hVfsFss); + RTVfsIoStrmRelease(hVfsIos); + if (RT_SUCCESS(rc)) + { + /* + * Loop through all objects. Actually this wouldn't be required + * for .zip files but we opened it as I/O stream. + */ + for (bool fFound = false; !fFound;) + { + char *pszName; + RTVFSOBJ hVfsObj; + rc = RTVfsFsStrmNext(hVfsFss, &pszName, NULL /*penmType*/, &hVfsObj); + if (RT_FAILURE(rc)) + break; + fFound = !strcmp(pszName, pszObject); + if (fFound) + { + RTFSOBJINFO UnixInfo; + rc = RTVfsObjQueryInfo(hVfsObj, &UnixInfo, RTFSOBJATTRADD_UNIX); + if (RT_SUCCESS(rc)) + { + size_t cb = UnixInfo.cbObject; + void *pv = RTMemAlloc(cb); + if (pv) + { + RTVFSIOSTREAM hVfsIosObj = RTVfsObjToIoStream(hVfsObj); + if (hVfsIos != NIL_RTVFSIOSTREAM) + { + rc = RTVfsIoStrmRead(hVfsIosObj, pv, cb, true /*fBlocking*/, NULL); + if (RT_SUCCESS(rc)) + { + *ppvDst = pv; + *pcbDst = cb; + } + } + else + rc = VERR_INTERNAL_ERROR_4; + if (RT_FAILURE(rc)) + RTMemFree(pv); + } + } + } + RTVfsObjRelease(hVfsObj); + RTStrFree(pszName); + } + RTVfsFsStrmRelease(hVfsFss); + } + } + return rc; +} |