/* * Copyright (c) 1995, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * Prototypes for zip file support */ #ifndef _ZIP_H_ #define _ZIP_H_ #include "jni.h" /* * Header signatures */ #define PKZIP_SIGNATURE_AT(p, b2, b3) \ (((p)[0] == 'P') & ((p)[1] == 'K') & ((p)[2] == b2) & ((p)[3] == b3)) #define CENSIG_AT(p) PKZIP_SIGNATURE_AT(p, 1, 2) #define LOCSIG_AT(p) PKZIP_SIGNATURE_AT(p, 3, 4) #define ENDSIG_AT(p) PKZIP_SIGNATURE_AT(p, 5, 6) #define EXTSIG_AT(p) PKZIP_SIGNATURE_AT(p, 7, 8) #define ZIP64_ENDSIG_AT(p) PKZIP_SIGNATURE_AT(p, 6, 6) #define ZIP64_LOCSIG_AT(p) PKZIP_SIGNATURE_AT(p, 6, 7) /* * Header sizes including signatures */ #define LOCHDR 30 #define EXTHDR 16 #define CENHDR 46 #define ENDHDR 22 #define ZIP64_ENDHDR 56 // ZIP64 end header size #define ZIP64_LOCHDR 20 // ZIP64 end loc header size #define ZIP64_EXTHDR 24 // EXT header size #define ZIP64_EXTID 1 // Extra field Zip64 header ID #define ZIP64_MAGICVAL 0xffffffffLL #define ZIP64_MAGICCOUNT 0xffff /* * Header field access macros */ #define CH(b, n) (((unsigned char *)(b))[n]) #define SH(b, n) (CH(b, n) | (CH(b, n+1) << 8)) #define LG(b, n) ((SH(b, n) | (SH(b, n+2) << 16)) &0xffffffffUL) #define LL(b, n) (((jlong)LG(b, n)) | (((jlong)LG(b, n+4)) << 32)) #define GETSIG(b) LG(b, 0) /* * Macros for getting local file (LOC) header fields */ #define LOCVER(b) SH(b, 4) /* version needed to extract */ #define LOCFLG(b) SH(b, 6) /* general purpose bit flags */ #define LOCHOW(b) SH(b, 8) /* compression method */ #define LOCTIM(b) LG(b, 10) /* modification time */ #define LOCCRC(b) LG(b, 14) /* crc of uncompressed data */ #define LOCSIZ(b) LG(b, 18) /* compressed data size */ #define LOCLEN(b) LG(b, 22) /* uncompressed data size */ #define LOCNAM(b) SH(b, 26) /* filename length */ #define LOCEXT(b) SH(b, 28) /* extra field length */ /* * Macros for getting extra local (EXT) header fields */ #define EXTCRC(b) LG(b, 4) /* crc of uncompressed data */ #define EXTSIZ(b) LG(b, 8) /* compressed size */ #define EXTLEN(b) LG(b, 12) /* uncompressed size */ /* * Macros for getting central directory header (CEN) fields */ #define CENVEM(b) SH(b, 4) /* version made by */ #define CENVER(b) SH(b, 6) /* version needed to extract */ #define CENFLG(b) SH(b, 8) /* general purpose bit flags */ #define CENHOW(b) SH(b, 10) /* compression method */ #define CENTIM(b) LG(b, 12) /* modification time */ #define CENCRC(b) LG(b, 16) /* crc of uncompressed data */ #define CENSIZ(b) LG(b, 20) /* compressed size */ #define CENLEN(b) LG(b, 24) /* uncompressed size */ #define CENNAM(b) SH(b, 28) /* length of filename */ #define CENEXT(b) SH(b, 30) /* length of extra field */ #define CENCOM(b) SH(b, 32) /* file comment length */ #define CENDSK(b) SH(b, 34) /* disk number start */ #define CENATT(b) SH(b, 36) /* internal file attributes */ #define CENATX(b) LG(b, 38) /* external file attributes */ #define CENOFF(b) LG(b, 42) /* offset of local header */ /* * Macros for getting end of central directory header (END) fields */ #define ENDSUB(b) SH(b, 8) /* number of entries on this disk */ #define ENDTOT(b) SH(b, 10) /* total number of entries */ #define ENDSIZ(b) LG(b, 12) /* central directory size */ #define ENDOFF(b) LG(b, 16) /* central directory offset */ #define ENDCOM(b) SH(b, 20) /* size of zip file comment */ /* * Macros for getting Zip64 end of central directory header fields */ #define ZIP64_ENDLEN(b) LL(b, 4) /* size of zip64 end of central dir */ #define ZIP64_ENDVEM(b) SH(b, 12) /* version made by */ #define ZIP64_ENDVER(b) SH(b, 14) /* version needed to extract */ #define ZIP64_ENDNMD(b) LG(b, 16) /* number of this disk */ #define ZIP64_ENDDSK(b) LG(b, 20) /* disk number of start */ #define ZIP64_ENDTOD(b) LL(b, 24) /* total number of entries on this disk */ #define ZIP64_ENDTOT(b) LL(b, 32) /* total number of entries */ #define ZIP64_ENDSIZ(b) LL(b, 40) /* central directory size in bytes */ #define ZIP64_ENDOFF(b) LL(b, 48) /* offset of first CEN header */ /* * Macros for getting Zip64 end of central directory locator fields */ #define ZIP64_LOCDSK(b) LG(b, 4) /* disk number start */ #define ZIP64_LOCOFF(b) LL(b, 8) /* offset of zip64 end */ #define ZIP64_LOCTOT(b) LG(b, 16) /* total number of disks */ /* * Supported compression methods */ #define STORED 0 #define DEFLATED 8 /* * Support for reading ZIP/JAR files. Some things worth noting: * * - Zip file entries larger than 2**32 bytes are not supported. * - jzentry time and crc fields are signed even though they really * represent unsigned quantities. * - If csize is zero then the entry is uncompressed. * - If extra != 0 then the first two bytes are the length of the extra * data in intel byte order. * - If pos <= 0 then it is the position of entry LOC header. * If pos > 0 then it is the position of entry data. * pos should not be accessed directly, but only by ZIP_GetEntryDataOffset. * - entry name may include embedded null character, use nlen for length */ typedef struct jzentry { /* Zip file entry */ char *name; /* entry name */ jlong time; /* modification time */ jlong size; /* size of uncompressed data */ jlong csize; /* size of compressed data (zero if uncompressed) */ jint crc; /* crc of uncompressed data */ char *comment; /* optional zip file comment */ jbyte *extra; /* optional extra data */ jlong pos; /* position of LOC header or entry data */ jint flag; /* general purpose flag */ jint nlen; /* length of the entry name */ } jzentry; /* * In-memory hash table cell. * In a typical system we have a *lot* of these, as we have one for * every entry in every active JAR. * Note that in order to save space we don't keep the name in memory, * but merely remember a 32 bit hash. */ typedef struct jzcell { unsigned int hash; /* 32 bit hashcode on name */ unsigned int next; /* hash chain: index into jzfile->entries */ jlong cenpos; /* Offset of central directory file header */ } jzcell; typedef struct cencache { char *data; /* A cached page of CEN headers */ jlong pos; /* file offset of data */ } cencache; /* * Use ZFILE to represent access to a file in a platform-indepenent * fashion. */ #ifdef WIN32 #define ZFILE jlong #else #define ZFILE int #endif /* * Descriptor for a ZIP file. */ typedef struct jzfile { /* Zip file */ char *name; /* zip file name */ jint refs; /* number of active references */ jlong len; /* length (in bytes) of zip file */ #ifdef USE_MMAP unsigned char *maddr; /* beginning address of the CEN & ENDHDR */ jlong mlen; /* length (in bytes) mmaped */ jlong offset; /* offset of the mmapped region from the start of the file. */ jboolean usemmap; /* if mmap is used. */ #endif jboolean locsig; /* if zip file starts with LOCSIG */ cencache cencache; /* CEN header cache */ ZFILE zfd; /* open file descriptor */ void *lock; /* read lock */ char *comment; /* zip file comment */ jint clen; /* length of the zip file comment */ char *msg; /* zip error message */ jzcell *entries; /* array of hash cells */ jint total; /* total number of entries */ jint *table; /* Hash chain heads: indexes into entries */ jint tablelen; /* number of hash heads */ struct jzfile *next; /* next zip file in search list */ jzentry *cache; /* we cache the most recently freed jzentry */ /* Information on metadata names in META-INF directory */ char **metanames; /* array of meta names (may have null names) */ jint metacurrent; /* the next empty slot in metanames array */ jint metacount; /* number of slots in metanames array */ jlong lastModified; /* last modified time */ jlong locpos; /* position of first LOC header (usually 0) */ } jzfile; /* * Index representing end of hash chain */ #define ZIP_ENDCHAIN ((jint)-1) JNIEXPORT jzentry * ZIP_FindEntry(jzfile *zip, char *name, jint *sizeP, jint *nameLenP); JNIEXPORT jboolean ZIP_ReadEntry(jzfile *zip, jzentry *entry, unsigned char *buf, char *entrynm); JNIEXPORT jzentry * ZIP_GetNextEntry(jzfile *zip, jint n); JNIEXPORT jzfile * ZIP_Open(const char *name, char **pmsg); jzfile * ZIP_Open_Generic(const char *name, char **pmsg, int mode, jlong lastModified); jzfile * ZIP_Get_From_Cache(const char *name, char **pmsg, jlong lastModified); jzfile * ZIP_Put_In_Cache(const char *name, ZFILE zfd, char **pmsg, jlong lastModified); jzfile * ZIP_Put_In_Cache0(const char *name, ZFILE zfd, char **pmsg, jlong lastModified, jboolean usemmap); JNIEXPORT void ZIP_Close(jzfile *zip); JNIEXPORT jzentry * ZIP_GetEntry(jzfile *zip, char *name, jint ulen); JNIEXPORT void JNICALL ZIP_Lock(jzfile *zip); JNIEXPORT void JNICALL ZIP_Unlock(jzfile *zip); JNIEXPORT jint JNICALL ZIP_Read(jzfile *zip, jzentry *entry, jlong pos, void *buf, jint len); JNIEXPORT void JNICALL ZIP_FreeEntry(jzfile *zip, jzentry *ze); jlong ZIP_GetEntryDataOffset(jzfile *zip, jzentry *entry); jzentry * ZIP_GetEntry2(jzfile *zip, char *name, jint ulen, jboolean addSlash); JNIEXPORT jboolean ZIP_InflateFully(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg); #endif /* !_ZIP_H_ */