diff options
Diffstat (limited to 'ext/zip/lib/zip_fopen_index_encrypted.c')
| -rw-r--r-- | ext/zip/lib/zip_fopen_index_encrypted.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/ext/zip/lib/zip_fopen_index_encrypted.c b/ext/zip/lib/zip_fopen_index_encrypted.c new file mode 100644 index 0000000..988a78f --- /dev/null +++ b/ext/zip/lib/zip_fopen_index_encrypted.c @@ -0,0 +1,191 @@ +/* + zip_fopen_index_encrypted.c -- open file for reading by index w/ password + Copyright (C) 1999-2009 Dieter Baron and Thomas Klausner + + This file is part of libzip, a library to manipulate ZIP archives. + The authors can be contacted at <libzip@nih.at> + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in + the documentation and/or other materials provided with the + distribution. + 3. The names of the authors may not be used to endorse or promote + products derived from this software without specific prior + written permission. + + THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS + OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + + + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> + +#include "zipint.h" + +static struct zip_file *_zip_file_new(struct zip *za); + + + +ZIP_EXTERN(struct zip_file *) +zip_fopen_index_encrypted(struct zip *za, zip_uint64_t fileno, int flags, + const char *password) +{ + struct zip_file *zf; + zip_compression_implementation comp_impl; + zip_encryption_implementation enc_impl; + struct zip_source *src, *s2; + zip_uint64_t start; + struct zip_stat st; + + if (fileno >= za->nentry) { + _zip_error_set(&za->error, ZIP_ER_INVAL, 0); + return NULL; + } + + if ((flags & ZIP_FL_UNCHANGED) == 0 + && ZIP_ENTRY_DATA_CHANGED(za->entry+fileno)) { + _zip_error_set(&za->error, ZIP_ER_CHANGED, 0); + return NULL; + } + + if (fileno >= za->cdir->nentry) { + _zip_error_set(&za->error, ZIP_ER_INVAL, 0); + return NULL; + } + + if (flags & ZIP_FL_ENCRYPTED) + flags |= ZIP_FL_COMPRESSED; + + zip_stat_index(za, fileno, flags, &st); + + enc_impl = NULL; + if ((flags & ZIP_FL_ENCRYPTED) == 0) { + if (st.encryption_method != ZIP_EM_NONE) { + if (password == NULL) { + _zip_error_set(&za->error, ZIP_ER_NOPASSWD, 0); + return NULL; + } + if ((enc_impl=zip_get_encryption_implementation( + st.encryption_method)) == NULL) { + _zip_error_set(&za->error, ZIP_ER_ENCRNOTSUPP, 0); + return NULL; + } + } + } + + comp_impl = NULL; + if ((flags & ZIP_FL_COMPRESSED) == 0) { + if (st.comp_method != ZIP_CM_STORE) { + if ((comp_impl=zip_get_compression_implementation( + st.comp_method)) == NULL) { + _zip_error_set(&za->error, ZIP_ER_COMPNOTSUPP, 0); + return NULL; + } + } + } + + if ((start=_zip_file_get_offset(za, fileno)) == 0) + return NULL; + + if (st.comp_size == 0) { + if ((src=zip_source_buffer(za, NULL, 0, 0)) == NULL) + return NULL; + } + else { + if ((src=_zip_source_file_or_p(za, NULL, za->zp, start, st.comp_size, + 0, &st)) == NULL) + return NULL; + if (enc_impl) { + if ((s2=enc_impl(za, src, ZIP_EM_TRAD_PKWARE, 0, + password)) == NULL) { + zip_source_free(src); + /* XXX: set error (how?) */ + return NULL; + } + src = s2; + } + if (comp_impl) { + if ((s2=comp_impl(za, src, za->cdir->entry[fileno].comp_method, + 0)) == NULL) { + zip_source_free(src); + /* XXX: set error (how?) */ + return NULL; + } + src = s2; + } + if ((flags & ZIP_FL_COMPRESSED) == 0 + || st.comp_method == ZIP_CM_STORE ) { + if ((s2=zip_source_crc(za, src, 1)) == NULL) { + zip_source_free(src); + /* XXX: set error (how?) */ + return NULL; + } + src = s2; + } + } + + if (zip_source_open(src) < 0) { + _zip_error_set_from_source(&za->error, src); + zip_source_free(src); + return NULL; + } + + zf = _zip_file_new(za); + + zf->src = src; + + return zf; +} + + + +static struct zip_file * +_zip_file_new(struct zip *za) +{ + struct zip_file *zf, **file; + int n; + + if ((zf=(struct zip_file *)malloc(sizeof(struct zip_file))) == NULL) { + _zip_error_set(&za->error, ZIP_ER_MEMORY, 0); + return NULL; + } + + if (za->nfile >= za->nfile_alloc-1) { + n = za->nfile_alloc + 10; + file = (struct zip_file **)realloc(za->file, + n*sizeof(struct zip_file *)); + if (file == NULL) { + _zip_error_set(&za->error, ZIP_ER_MEMORY, 0); + free(zf); + return NULL; + } + za->nfile_alloc = n; + za->file = file; + } + + za->file[za->nfile++] = zf; + + zf->za = za; + _zip_error_init(&zf->error); + zf->eof = 0; + zf->src = NULL; + + return zf; +} |