Annotation of embedaddon/php/ext/zip/lib/zip_fopen_index_encrypted.c, revision 1.1.1.1
1.1 misho 1: /*
2: zip_fopen_index_encrypted.c -- open file for reading by index w/ password
3: Copyright (C) 1999-2009 Dieter Baron and Thomas Klausner
4:
5: This file is part of libzip, a library to manipulate ZIP archives.
6: The authors can be contacted at <libzip@nih.at>
7:
8: Redistribution and use in source and binary forms, with or without
9: modification, are permitted provided that the following conditions
10: are met:
11: 1. Redistributions of source code must retain the above copyright
12: notice, this list of conditions and the following disclaimer.
13: 2. Redistributions in binary form must reproduce the above copyright
14: notice, this list of conditions and the following disclaimer in
15: the documentation and/or other materials provided with the
16: distribution.
17: 3. The names of the authors may not be used to endorse or promote
18: products derived from this software without specific prior
19: written permission.
20:
21: THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
22: OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
25: DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27: GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29: IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30: OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31: IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: */
33:
34:
35:
36: #include <errno.h>
37: #include <stdio.h>
38: #include <stdlib.h>
39:
40: #include "zipint.h"
41:
42: static struct zip_file *_zip_file_new(struct zip *za);
43:
44:
45:
46: ZIP_EXTERN(struct zip_file *)
47: zip_fopen_index_encrypted(struct zip *za, zip_uint64_t fileno, int flags,
48: const char *password)
49: {
50: struct zip_file *zf;
51: zip_compression_implementation comp_impl;
52: zip_encryption_implementation enc_impl;
53: struct zip_source *src, *s2;
54: zip_uint64_t start;
55: struct zip_stat st;
56:
57: if (fileno >= za->nentry) {
58: _zip_error_set(&za->error, ZIP_ER_INVAL, 0);
59: return NULL;
60: }
61:
62: if ((flags & ZIP_FL_UNCHANGED) == 0
63: && ZIP_ENTRY_DATA_CHANGED(za->entry+fileno)) {
64: _zip_error_set(&za->error, ZIP_ER_CHANGED, 0);
65: return NULL;
66: }
67:
68: if (fileno >= za->cdir->nentry) {
69: _zip_error_set(&za->error, ZIP_ER_INVAL, 0);
70: return NULL;
71: }
72:
73: if (flags & ZIP_FL_ENCRYPTED)
74: flags |= ZIP_FL_COMPRESSED;
75:
76: zip_stat_index(za, fileno, flags, &st);
77:
78: enc_impl = NULL;
79: if ((flags & ZIP_FL_ENCRYPTED) == 0) {
80: if (st.encryption_method != ZIP_EM_NONE) {
81: if (password == NULL) {
82: _zip_error_set(&za->error, ZIP_ER_NOPASSWD, 0);
83: return NULL;
84: }
85: if ((enc_impl=zip_get_encryption_implementation(
86: st.encryption_method)) == NULL) {
87: _zip_error_set(&za->error, ZIP_ER_ENCRNOTSUPP, 0);
88: return NULL;
89: }
90: }
91: }
92:
93: comp_impl = NULL;
94: if ((flags & ZIP_FL_COMPRESSED) == 0) {
95: if (st.comp_method != ZIP_CM_STORE) {
96: if ((comp_impl=zip_get_compression_implementation(
97: st.comp_method)) == NULL) {
98: _zip_error_set(&za->error, ZIP_ER_COMPNOTSUPP, 0);
99: return NULL;
100: }
101: }
102: }
103:
104: if ((start=_zip_file_get_offset(za, fileno)) == 0)
105: return NULL;
106:
107: if (st.comp_size == 0) {
108: if ((src=zip_source_buffer(za, NULL, 0, 0)) == NULL)
109: return NULL;
110: }
111: else {
112: if ((src=_zip_source_file_or_p(za, NULL, za->zp, start, st.comp_size,
113: 0, &st)) == NULL)
114: return NULL;
115: if (enc_impl) {
116: if ((s2=enc_impl(za, src, ZIP_EM_TRAD_PKWARE, 0,
117: password)) == NULL) {
118: zip_source_free(src);
119: /* XXX: set error (how?) */
120: return NULL;
121: }
122: src = s2;
123: }
124: if (comp_impl) {
125: if ((s2=comp_impl(za, src, za->cdir->entry[fileno].comp_method,
126: 0)) == NULL) {
127: zip_source_free(src);
128: /* XXX: set error (how?) */
129: return NULL;
130: }
131: src = s2;
132: }
133: if ((flags & ZIP_FL_COMPRESSED) == 0
134: || st.comp_method == ZIP_CM_STORE ) {
135: if ((s2=zip_source_crc(za, src, 1)) == NULL) {
136: zip_source_free(src);
137: /* XXX: set error (how?) */
138: return NULL;
139: }
140: src = s2;
141: }
142: }
143:
144: if (zip_source_open(src) < 0) {
145: _zip_error_set_from_source(&za->error, src);
146: zip_source_free(src);
147: return NULL;
148: }
149:
150: zf = _zip_file_new(za);
151:
152: zf->src = src;
153:
154: return zf;
155: }
156:
157:
158:
159: static struct zip_file *
160: _zip_file_new(struct zip *za)
161: {
162: struct zip_file *zf, **file;
163: int n;
164:
165: if ((zf=(struct zip_file *)malloc(sizeof(struct zip_file))) == NULL) {
166: _zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
167: return NULL;
168: }
169:
170: if (za->nfile >= za->nfile_alloc-1) {
171: n = za->nfile_alloc + 10;
172: file = (struct zip_file **)realloc(za->file,
173: n*sizeof(struct zip_file *));
174: if (file == NULL) {
175: _zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
176: free(zf);
177: return NULL;
178: }
179: za->nfile_alloc = n;
180: za->file = file;
181: }
182:
183: za->file[za->nfile++] = zf;
184:
185: zf->za = za;
186: _zip_error_init(&zf->error);
187: zf->eof = 0;
188: zf->src = NULL;
189:
190: return zf;
191: }
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