/* zip_dirent.c -- read directory entry (local or central), clean dirent Copyright (C) 1999-2019 Dieter Baron and Thomas Klausner This file is part of libzip, a library to manipulate ZIP archives. The authors can be contacted 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 #include #include #include #include #include #include "zipint.h" static time_t _zip_d2u_time(zip_uint16_t, zip_uint16_t); static zip_string_t *_zip_dirent_process_ef_utf_8(const zip_dirent_t *de, zip_uint16_t id, zip_string_t *str); static zip_extra_field_t *_zip_ef_utf8(zip_uint16_t, zip_string_t *, zip_error_t *); static bool _zip_dirent_process_winzip_aes(zip_dirent_t *de, zip_error_t *error); void _zip_cdir_free(zip_cdir_t *cd) { zip_uint64_t i; if (!cd) return; for (i = 0; i < cd->nentry; i++) _zip_entry_finalize(cd->entry + i); free(cd->entry); _zip_string_free(cd->comment); free(cd); } zip_cdir_t * _zip_cdir_new(zip_uint64_t nentry, zip_error_t *error) { zip_cdir_t *cd; if ((cd = (zip_cdir_t *)malloc(sizeof(*cd))) == NULL) { zip_error_set(error, ZIP_ER_MEMORY, 0); return NULL; } cd->entry = NULL; cd->nentry = cd->nentry_alloc = 0; cd->size = cd->offset = 0; cd->comment = NULL; cd->is_zip64 = false; if (!_zip_cdir_grow(cd, nentry, error)) { _zip_cdir_free(cd); return NULL; } return cd; } bool _zip_cdir_grow(zip_cdir_t *cd, zip_uint64_t additional_entries, zip_error_t *error) { zip_uint64_t i, new_alloc; zip_entry_t *new_entry; if (additional_entries == 0) { return true; } new_alloc = cd->nentry_alloc + additional_entries; if (new_alloc < additional_entries || new_alloc > SIZE_MAX / sizeof(*(cd->entry))) { zip_error_set(error, ZIP_ER_MEMORY, 0); return false; } if ((new_entry = (zip_entry_t *)realloc(cd->entry, sizeof(*(cd->entry)) * (size_t)new_alloc)) == NULL) { zip_error_set(error, ZIP_ER_MEMORY, 0); return false; } cd->entry = new_entry; for (i = cd->nentry; i < new_alloc; i++) { _zip_entry_init(cd->entry + i); } cd->nentry = cd->nentry_alloc = new_alloc; return true; } zip_int64_t _zip_cdir_write(zip_t *za, const zip_filelist_t *filelist, zip_uint64_t survivors) { zip_uint64_t offset, size; zip_string_t *comment; zip_uint8_t buf[EOCDLEN + EOCD64LEN + EOCD64LOCLEN]; zip_buffer_t *buffer; zip_int64_t off; zip_uint64_t i; bool is_zip64; int ret; if ((off = zip_source_tell_write(za->src)) < 0) { _zip_error_set_from_source(&za->error, za->src); return -1; } offset = (zip_uint64_t)off; is_zip64 = false; for (i = 0; i < survivors; i++) { zip_entry_t *entry = za->entry + filelist[i].idx; if ((ret = _zip_dirent_write(za, entry->changes ? entry->changes : entry->orig, ZIP_FL_CENTRAL)) < 0) return -1; if (ret) is_zip64 = true; } if ((off = zip_source_tell_write(za->src)) < 0) { _zip_error_set_from_source(&za->error, za->src); return -1; } size = (zip_uint64_t)off - offset; if (offset > ZIP_UINT32_MAX || survivors > ZIP_UINT16_MAX) is_zip64 = true; if ((buffer = _zip_buffer_new(buf, sizeof(buf))) == NULL) { zip_error_set(&za->error, ZIP_ER_MEMORY, 0); return -1; } if (is_zip64) { _zip_buffer_put(buffer, EOCD64_MAGIC, 4); _zip_buffer_put_64(buffer, EOCD64LEN - 12); _zip_buffer_put_16(buffer, 45); _zip_buffer_put_16(buffer, 45); _zip_buffer_put_32(buffer, 0); _zip_buffer_put_32(buffer, 0); _zip_buffer_put_64(buffer, survivors); _zip_buffer_put_64(buffer, survivors); _zip_buffer_put_64(buffer, size); _zip_buffer_put_64(buffer, offset); _zip_buffer_put(buffer, EOCD64LOC_MAGIC, 4); _zip_buffer_put_32(buffer, 0); _zip_buffer_put_64(buffer, offset + size); _zip_buffer_put_32(buffer, 1); } _zip_buffer_put(buffer, EOCD_MAGIC, 4); _zip_buffer_put_32(buffer, 0); _zip_buffer_put_16(buffer, (zip_uint16_t)(survivors >= ZIP_UINT16_MAX ? ZIP_UINT16_MAX : survivors)); _zip_buffer_put_16(buffer, (zip_uint16_t)(survivors >= ZIP_UINT16_MAX ? ZIP_UINT16_MAX : survivors)); _zip_buffer_put_32(buffer, size >= ZIP_UINT32_MAX ? ZIP_UINT32_MAX : (zip_uint32_t)size); _zip_buffer_put_32(buffer, offset >= ZIP_UINT32_MAX ? ZIP_UINT32_MAX : (zip_uint32_t)offset); comment = za->comment_changed ? za->comment_changes : za->comment_orig; _zip_buffer_put_16(buffer, (zip_uint16_t)(comment ? comment->length : 0)); if (!_zip_buffer_ok(buffer)) { zip_error_set(&za->error, ZIP_ER_INTERNAL, 0); _zip_buffer_free(buffer); return -1; } if (_zip_write(za, _zip_buffer_data(buffer), _zip_buffer_offset(buffer)) < 0) { _zip_buffer_free(buffer); return -1; } _zip_buffer_free(buffer); if (comment) { if (_zip_write(za, comment->raw, comment->length) < 0) { return -1; } } return (zip_int64_t)size; } zip_dirent_t * _zip_dirent_clone(const zip_dirent_t *sde) { zip_dirent_t *tde; if ((tde = (zip_dirent_t *)malloc(sizeof(*tde))) == NULL) return NULL; if (sde) memcpy(tde, sde, sizeof(*sde)); else _zip_dirent_init(tde); tde->changed = 0; tde->cloned = 1; return tde; } void _zip_dirent_finalize(zip_dirent_t *zde) { if (!zde->cloned || zde->changed & ZIP_DIRENT_FILENAME) { _zip_string_free(zde->filename); zde->filename = NULL; } if (!zde->cloned || zde->changed & ZIP_DIRENT_EXTRA_FIELD) { _zip_ef_free(zde->extra_fields); zde->extra_fields = NULL; } if (!zde->cloned || zde->changed & ZIP_DIRENT_COMMENT) { _zip_string_free(zde->comment); zde->comment = NULL; } if (!zde->cloned || zde->changed & ZIP_DIRENT_PASSWORD) { if (zde->password) { _zip_crypto_clear(zde->password, strlen(zde->password)); } free(zde->password); zde->password = NULL; } } void _zip_dirent_free(zip_dirent_t *zde) { if (zde == NULL) return; _zip_dirent_finalize(zde); free(zde); } void _zip_dirent_init(zip_dirent_t *de) { de->changed = 0; de->local_extra_fields_read = 0; de->cloned = 0; de->crc_valid = true; de->version_madeby = 63 | (ZIP_OPSYS_DEFAULT << 8); de->version_needed = 10; /* 1.0 */ de->bitflags = 0; de->comp_method = ZIP_CM_DEFAULT; de->last_mod = 0; de->crc = 0; de->comp_size = 0; de->uncomp_size = 0; de->filename = NULL; de->extra_fields = NULL; de->comment = NULL; de->disk_number = 0; de->int_attrib = 0; de->ext_attrib = ZIP_EXT_ATTRIB_DEFAULT; de->offset = 0; de->compression_level = 0; de->encryption_method = ZIP_EM_NONE; de->password = NULL; } bool _zip_dirent_needs_zip64(const zip_dirent_t *de, zip_flags_t flags) { if (de->uncomp_size >= ZIP_UINT32_MAX || de->comp_size >= ZIP_UINT32_MAX || ((flags & ZIP_FL_CENTRAL) && de->offset >= ZIP_UINT32_MAX)) return true; return false; } zip_dirent_t * _zip_dirent_new(void) { zip_dirent_t *de; if ((de = (zip_dirent_t *)malloc(sizeof(*de))) == NULL) return NULL; _zip_dirent_init(de); return de; } /* _zip_dirent_read(zde, fp, bufp, left, localp, error): Fills the zip directory entry zde. If buffer is non-NULL, data is taken from there; otherwise data is read from fp as needed. If local is true, it reads a local header instead of a central directory entry. Returns size of dirent read if successful. On error, error is filled in and -1 is returned. */ zip_int64_t _zip_dirent_read(zip_dirent_t *zde, zip_source_t *src, zip_buffer_t *buffer, bool local, zip_error_t *error) { zip_uint8_t buf[CDENTRYSIZE]; zip_uint16_t dostime, dosdate; zip_uint32_t size, variable_size; zip_uint16_t filename_len, comment_len, ef_len; bool from_buffer = (buffer != NULL); size = local ? LENTRYSIZE : CDENTRYSIZE; if (buffer) { if (_zip_buffer_left(buffer) < size) { zip_error_set(error, ZIP_ER_NOZIP, 0); return -1; } } else { if ((buffer = _zip_buffer_new_from_source(src, size, buf, error)) == NULL) { return -1; } } if (memcmp(_zip_buffer_get(buffer, 4), (local ? LOCAL_MAGIC : CENTRAL_MAGIC), 4) != 0) { zip_error_set(error, ZIP_ER_NOZIP, 0); if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } /* convert buffercontents to zip_dirent */ _zip_dirent_init(zde); if (!local) zde->version_madeby = _zip_buffer_get_16(buffer); else zde->version_madeby = 0; zde->version_needed = _zip_buffer_get_16(buffer); zde->bitflags = _zip_buffer_get_16(buffer); zde->comp_method = _zip_buffer_get_16(buffer); /* convert to time_t */ dostime = _zip_buffer_get_16(buffer); dosdate = _zip_buffer_get_16(buffer); zde->last_mod = _zip_d2u_time(dostime, dosdate); zde->crc = _zip_buffer_get_32(buffer); zde->comp_size = _zip_buffer_get_32(buffer); zde->uncomp_size = _zip_buffer_get_32(buffer); filename_len = _zip_buffer_get_16(buffer); ef_len = _zip_buffer_get_16(buffer); if (local) { comment_len = 0; zde->disk_number = 0; zde->int_attrib = 0; zde->ext_attrib = 0; zde->offset = 0; } else { comment_len = _zip_buffer_get_16(buffer); zde->disk_number = _zip_buffer_get_16(buffer); zde->int_attrib = _zip_buffer_get_16(buffer); zde->ext_attrib = _zip_buffer_get_32(buffer); zde->offset = _zip_buffer_get_32(buffer); } if (!_zip_buffer_ok(buffer)) { zip_error_set(error, ZIP_ER_INTERNAL, 0); if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } if (zde->bitflags & ZIP_GPBF_ENCRYPTED) { if (zde->bitflags & ZIP_GPBF_STRONG_ENCRYPTION) { /* TODO */ zde->encryption_method = ZIP_EM_UNKNOWN; } else { zde->encryption_method = ZIP_EM_TRAD_PKWARE; } } else { zde->encryption_method = ZIP_EM_NONE; } zde->filename = NULL; zde->extra_fields = NULL; zde->comment = NULL; variable_size = (zip_uint32_t)filename_len + (zip_uint32_t)ef_len + (zip_uint32_t)comment_len; if (from_buffer) { if (_zip_buffer_left(buffer) < variable_size) { zip_error_set(error, ZIP_ER_INCONS, 0); return -1; } } else { _zip_buffer_free(buffer); if ((buffer = _zip_buffer_new_from_source(src, variable_size, NULL, error)) == NULL) { return -1; } } if (filename_len) { zde->filename = _zip_read_string(buffer, src, filename_len, 1, error); if (!zde->filename) { if (zip_error_code_zip(error) == ZIP_ER_EOF) { zip_error_set(error, ZIP_ER_INCONS, 0); } if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } if (zde->bitflags & ZIP_GPBF_ENCODING_UTF_8) { if (_zip_guess_encoding(zde->filename, ZIP_ENCODING_UTF8_KNOWN) == ZIP_ENCODING_ERROR) { zip_error_set(error, ZIP_ER_INCONS, 0); if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } } } if (ef_len) { zip_uint8_t *ef = _zip_read_data(buffer, src, ef_len, 0, error); if (ef == NULL) { if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } if (!_zip_ef_parse(ef, ef_len, local ? ZIP_EF_LOCAL : ZIP_EF_CENTRAL, &zde->extra_fields, error)) { free(ef); if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } free(ef); if (local) zde->local_extra_fields_read = 1; } if (comment_len) { zde->comment = _zip_read_string(buffer, src, comment_len, 0, error); if (!zde->comment) { if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } if (zde->bitflags & ZIP_GPBF_ENCODING_UTF_8) { if (_zip_guess_encoding(zde->comment, ZIP_ENCODING_UTF8_KNOWN) == ZIP_ENCODING_ERROR) { zip_error_set(error, ZIP_ER_INCONS, 0); if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } } } zde->filename = _zip_dirent_process_ef_utf_8(zde, ZIP_EF_UTF_8_NAME, zde->filename); zde->comment = _zip_dirent_process_ef_utf_8(zde, ZIP_EF_UTF_8_COMMENT, zde->comment); /* Zip64 */ if (zde->uncomp_size == ZIP_UINT32_MAX || zde->comp_size == ZIP_UINT32_MAX || zde->offset == ZIP_UINT32_MAX) { zip_uint16_t got_len; zip_buffer_t *ef_buffer; const zip_uint8_t *ef = _zip_ef_get_by_id(zde->extra_fields, &got_len, ZIP_EF_ZIP64, 0, local ? ZIP_EF_LOCAL : ZIP_EF_CENTRAL, error); /* TODO: if got_len == 0 && !ZIP64_EOCD: no error, 0xffffffff is valid value */ if (ef == NULL) { if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } if ((ef_buffer = _zip_buffer_new((zip_uint8_t *)ef, got_len)) == NULL) { zip_error_set(error, ZIP_ER_MEMORY, 0); if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } if (zde->uncomp_size == ZIP_UINT32_MAX) zde->uncomp_size = _zip_buffer_get_64(ef_buffer); else if (local) { /* From appnote.txt: This entry in the Local header MUST include BOTH original and compressed file size fields. */ (void)_zip_buffer_skip(ef_buffer, 8); /* error is caught by _zip_buffer_eof() call */ } if (zde->comp_size == ZIP_UINT32_MAX) zde->comp_size = _zip_buffer_get_64(ef_buffer); if (!local) { if (zde->offset == ZIP_UINT32_MAX) zde->offset = _zip_buffer_get_64(ef_buffer); if (zde->disk_number == ZIP_UINT16_MAX) zde->disk_number = _zip_buffer_get_32(ef_buffer); } if (!_zip_buffer_eof(ef_buffer)) { zip_error_set(error, ZIP_ER_INCONS, 0); _zip_buffer_free(ef_buffer); if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } _zip_buffer_free(ef_buffer); } if (!_zip_buffer_ok(buffer)) { zip_error_set(error, ZIP_ER_INTERNAL, 0); if (!from_buffer) { _zip_buffer_free(buffer); } return -1; } if (!from_buffer) { _zip_buffer_free(buffer); } /* zip_source_seek / zip_source_tell don't support values > ZIP_INT64_MAX */ if (zde->offset > ZIP_INT64_MAX) { zip_error_set(error, ZIP_ER_SEEK, EFBIG); return -1; } if (!_zip_dirent_process_winzip_aes(zde, error)) { return -1; } zde->extra_fields = _zip_ef_remove_internal(zde->extra_fields); return (zip_int64_t)(size + variable_size); } static zip_string_t * _zip_dirent_process_ef_utf_8(const zip_dirent_t *de, zip_uint16_t id, zip_string_t *str) { zip_uint16_t ef_len; zip_uint32_t ef_crc; zip_buffer_t *buffer; const zip_uint8_t *ef = _zip_ef_get_by_id(de->extra_fields, &ef_len, id, 0, ZIP_EF_BOTH, NULL); if (ef == NULL || ef_len < 5 || ef[0] != 1) { return str; } if ((buffer = _zip_buffer_new((zip_uint8_t *)ef, ef_len)) == NULL) { return str; } _zip_buffer_get_8(buffer); ef_crc = _zip_buffer_get_32(buffer); if (_zip_string_crc32(str) == ef_crc) { zip_uint16_t len = (zip_uint16_t)_zip_buffer_left(buffer); zip_string_t *ef_str = _zip_string_new(_zip_buffer_get(buffer, len), len, ZIP_FL_ENC_UTF_8, NULL); if (ef_str != NULL) { _zip_string_free(str); str = ef_str; } } _zip_buffer_free(buffer); return str; } static bool _zip_dirent_process_winzip_aes(zip_dirent_t *de, zip_error_t *error) { zip_uint16_t ef_len; zip_buffer_t *buffer; const zip_uint8_t *ef; bool crc_valid; zip_uint16_t enc_method; if (de->comp_method != ZIP_CM_WINZIP_AES) { return true; } ef = _zip_ef_get_by_id(de->extra_fields, &ef_len, ZIP_EF_WINZIP_AES, 0, ZIP_EF_BOTH, NULL); if (ef == NULL || ef_len < 7) { zip_error_set(error, ZIP_ER_INCONS, 0); return false; } if ((buffer = _zip_buffer_new((zip_uint8_t *)ef, ef_len)) == NULL) { zip_error_set(error, ZIP_ER_INTERNAL, 0); return false; } /* version */ crc_valid = true; switch (_zip_buffer_get_16(buffer)) { case 1: break; case 2: if (de->uncomp_size < 20 /* TODO: constant */) { crc_valid = false; } break; default: zip_error_set(error, ZIP_ER_ENCRNOTSUPP, 0); _zip_buffer_free(buffer); return false; } /* vendor */ if (memcmp(_zip_buffer_get(buffer, 2), "AE", 2) != 0) { zip_error_set(error, ZIP_ER_ENCRNOTSUPP, 0); _zip_buffer_free(buffer); return false; } /* mode */ switch (_zip_buffer_get_8(buffer)) { case 1: enc_method = ZIP_EM_AES_128; break; case 2: enc_method = ZIP_EM_AES_192; break; case 3: enc_method = ZIP_EM_AES_256; break; default: zip_error_set(error, ZIP_ER_ENCRNOTSUPP, 0); _zip_buffer_free(buffer); return false; } if (ef_len != 7) { zip_error_set(error, ZIP_ER_INCONS, 0); _zip_buffer_free(buffer); return false; } de->crc_valid = crc_valid; de->encryption_method = enc_method; de->comp_method = _zip_buffer_get_16(buffer); _zip_buffer_free(buffer); return true; } zip_int32_t _zip_dirent_size(zip_source_t *src, zip_uint16_t flags, zip_error_t *error) { zip_int32_t size; bool local = (flags & ZIP_EF_LOCAL) != 0; int i; zip_uint8_t b[6]; zip_buffer_t *buffer; size = local ? LENTRYSIZE : CDENTRYSIZE; if (zip_source_seek(src, local ? 26 : 28, SEEK_CUR) < 0) { _zip_error_set_from_source(error, src); return -1; } if ((buffer = _zip_buffer_new_from_source(src, local ? 4 : 6, b, error)) == NULL) { return -1; } for (i = 0; i < (local ? 2 : 3); i++) { size += _zip_buffer_get_16(buffer); } if (!_zip_buffer_eof(buffer)) { zip_error_set(error, ZIP_ER_INTERNAL, 0); _zip_buffer_free(buffer); return -1; } _zip_buffer_free(buffer); return size; } /* _zip_dirent_write Writes zip directory entry. If flags & ZIP_EF_LOCAL, it writes a local header instead of a central directory entry. If flags & ZIP_EF_FORCE_ZIP64, a ZIP64 extra field is written, even if not needed. Returns 0 if successful, 1 if successful and wrote ZIP64 extra field. On error, error is filled in and -1 is returned. */ int _zip_dirent_write(zip_t *za, zip_dirent_t *de, zip_flags_t flags) { zip_uint16_t dostime, dosdate; zip_encoding_type_t com_enc, name_enc; zip_extra_field_t *ef; zip_extra_field_t *ef64; zip_uint32_t ef_total_size; bool is_zip64; bool is_really_zip64; bool is_winzip_aes; zip_uint8_t buf[CDENTRYSIZE]; zip_buffer_t *buffer; ef = NULL; name_enc = _zip_guess_encoding(de->filename, ZIP_ENCODING_UNKNOWN); com_enc = _zip_guess_encoding(de->comment, ZIP_ENCODING_UNKNOWN); if ((name_enc == ZIP_ENCODING_UTF8_KNOWN && com_enc == ZIP_ENCODING_ASCII) || (name_enc == ZIP_ENCODING_ASCII && com_enc == ZIP_ENCODING_UTF8_KNOWN) || (name_enc == ZIP_ENCODING_UTF8_KNOWN && com_enc == ZIP_ENCODING_UTF8_KNOWN)) de->bitflags |= ZIP_GPBF_ENCODING_UTF_8; else { de->bitflags &= (zip_uint16_t)~ZIP_GPBF_ENCODING_UTF_8; if (name_enc == ZIP_ENCODING_UTF8_KNOWN) { ef = _zip_ef_utf8(ZIP_EF_UTF_8_NAME, de->filename, &za->error); if (ef == NULL) return -1; } if ((flags & ZIP_FL_LOCAL) == 0 && com_enc == ZIP_ENCODING_UTF8_KNOWN) { zip_extra_field_t *ef2 = _zip_ef_utf8(ZIP_EF_UTF_8_COMMENT, de->comment, &za->error); if (ef2 == NULL) { _zip_ef_free(ef); return -1; } ef2->next = ef; ef = ef2; } } if (de->encryption_method == ZIP_EM_NONE) { de->bitflags &= (zip_uint16_t)~ZIP_GPBF_ENCRYPTED; } else { de->bitflags |= (zip_uint16_t)ZIP_GPBF_ENCRYPTED; } is_really_zip64 = _zip_dirent_needs_zip64(de, flags); is_zip64 = (flags & (ZIP_FL_LOCAL | ZIP_FL_FORCE_ZIP64)) == (ZIP_FL_LOCAL | ZIP_FL_FORCE_ZIP64) || is_really_zip64; is_winzip_aes = de->encryption_method == ZIP_EM_AES_128 || de->encryption_method == ZIP_EM_AES_192 || de->encryption_method == ZIP_EM_AES_256; if (is_zip64) { zip_uint8_t ef_zip64[EFZIP64SIZE]; zip_buffer_t *ef_buffer = _zip_buffer_new(ef_zip64, sizeof(ef_zip64)); if (ef_buffer == NULL) { zip_error_set(&za->error, ZIP_ER_MEMORY, 0); _zip_ef_free(ef); return -1; } if (flags & ZIP_FL_LOCAL) { if ((flags & ZIP_FL_FORCE_ZIP64) || de->comp_size > ZIP_UINT32_MAX || de->uncomp_size > ZIP_UINT32_MAX) { _zip_buffer_put_64(ef_buffer, de->uncomp_size); _zip_buffer_put_64(ef_buffer, de->comp_size); } } else { if ((flags & ZIP_FL_FORCE_ZIP64) || de->comp_size > ZIP_UINT32_MAX || de->uncomp_size > ZIP_UINT32_MAX || de->offset > ZIP_UINT32_MAX) { if (de->uncomp_size >= ZIP_UINT32_MAX) { _zip_buffer_put_64(ef_buffer, de->uncomp_size); } if (de->comp_size >= ZIP_UINT32_MAX) { _zip_buffer_put_64(ef_buffer, de->comp_size); } if (de->offset >= ZIP_UINT32_MAX) { _zip_buffer_put_64(ef_buffer, de->offset); } } } if (!_zip_buffer_ok(ef_buffer)) { zip_error_set(&za->error, ZIP_ER_INTERNAL, 0); _zip_buffer_free(ef_buffer); _zip_ef_free(ef); return -1; } ef64 = _zip_ef_new(ZIP_EF_ZIP64, (zip_uint16_t)(_zip_buffer_offset(ef_buffer)), ef_zip64, ZIP_EF_BOTH); _zip_buffer_free(ef_buffer); ef64->next = ef; ef = ef64; } if (is_winzip_aes) { zip_uint8_t data[EF_WINZIP_AES_SIZE]; zip_buffer_t *ef_buffer = _zip_buffer_new(data, sizeof(data)); zip_extra_field_t *ef_winzip; if (ef_buffer == NULL) { zip_error_set(&za->error, ZIP_ER_MEMORY, 0); _zip_ef_free(ef); return -1; } _zip_buffer_put_16(ef_buffer, 2); _zip_buffer_put(ef_buffer, "AE", 2); _zip_buffer_put_8(ef_buffer, (zip_uint8_t)(de->encryption_method & 0xff)); _zip_buffer_put_16(ef_buffer, (zip_uint16_t)de->comp_method); if (!_zip_buffer_ok(ef_buffer)) { zip_error_set(&za->error, ZIP_ER_INTERNAL, 0); _zip_buffer_free(ef_buffer); _zip_ef_free(ef); return -1; } ef_winzip = _zip_ef_new(ZIP_EF_WINZIP_AES, EF_WINZIP_AES_SIZE, data, ZIP_EF_BOTH); _zip_buffer_free(ef_buffer); ef_winzip->next = ef; ef = ef_winzip; } if ((buffer = _zip_buffer_new(buf, sizeof(buf))) == NULL) { zip_error_set(&za->error, ZIP_ER_MEMORY, 0); _zip_ef_free(ef); return -1; } _zip_buffer_put(buffer, (flags & ZIP_FL_LOCAL) ? LOCAL_MAGIC : CENTRAL_MAGIC, 4); if ((flags & ZIP_FL_LOCAL) == 0) { _zip_buffer_put_16(buffer, (zip_uint16_t)(is_really_zip64 ? 45 : de->version_madeby)); } _zip_buffer_put_16(buffer, (zip_uint16_t)(is_really_zip64 ? 45 : de->version_needed)); _zip_buffer_put_16(buffer, de->bitflags); if (is_winzip_aes) { _zip_buffer_put_16(buffer, ZIP_CM_WINZIP_AES); } else { _zip_buffer_put_16(buffer, (zip_uint16_t)de->comp_method); } _zip_u2d_time(de->last_mod, &dostime, &dosdate); _zip_buffer_put_16(buffer, dostime); _zip_buffer_put_16(buffer, dosdate); if (is_winzip_aes && de->uncomp_size < 20) { _zip_buffer_put_32(buffer, 0); } else { _zip_buffer_put_32(buffer, de->crc); } if (((flags & ZIP_FL_LOCAL) == ZIP_FL_LOCAL) && ((de->comp_size >= ZIP_UINT32_MAX) || (de->uncomp_size >= ZIP_UINT32_MAX))) { /* In local headers, if a ZIP64 EF is written, it MUST contain * both compressed and uncompressed sizes (even if one of the * two is smaller than 0xFFFFFFFF); on the other hand, those * may only appear when the corresponding standard entry is * 0xFFFFFFFF. (appnote.txt 4.5.3) */ _zip_buffer_put_32(buffer, ZIP_UINT32_MAX); _zip_buffer_put_32(buffer, ZIP_UINT32_MAX); } else { if (de->comp_size < ZIP_UINT32_MAX) { _zip_buffer_put_32(buffer, (zip_uint32_t)de->comp_size); } else { _zip_buffer_put_32(buffer, ZIP_UINT32_MAX); } if (de->uncomp_size < ZIP_UINT32_MAX) { _zip_buffer_put_32(buffer, (zip_uint32_t)de->uncomp_size); } else { _zip_buffer_put_32(buffer, ZIP_UINT32_MAX); } } _zip_buffer_put_16(buffer, _zip_string_length(de->filename)); /* TODO: check for overflow */ ef_total_size = (zip_uint32_t)_zip_ef_size(de->extra_fields, flags) + (zip_uint32_t)_zip_ef_size(ef, ZIP_EF_BOTH); _zip_buffer_put_16(buffer, (zip_uint16_t)ef_total_size); if ((flags & ZIP_FL_LOCAL) == 0) { _zip_buffer_put_16(buffer, _zip_string_length(de->comment)); _zip_buffer_put_16(buffer, (zip_uint16_t)de->disk_number); _zip_buffer_put_16(buffer, de->int_attrib); _zip_buffer_put_32(buffer, de->ext_attrib); if (de->offset < ZIP_UINT32_MAX) _zip_buffer_put_32(buffer, (zip_uint32_t)de->offset); else _zip_buffer_put_32(buffer, ZIP_UINT32_MAX); } if (!_zip_buffer_ok(buffer)) { zip_error_set(&za->error, ZIP_ER_INTERNAL, 0); _zip_buffer_free(buffer); _zip_ef_free(ef); return -1; } if (_zip_write(za, buf, _zip_buffer_offset(buffer)) < 0) { _zip_buffer_free(buffer); _zip_ef_free(ef); return -1; } _zip_buffer_free(buffer); if (de->filename) { if (_zip_string_write(za, de->filename) < 0) { _zip_ef_free(ef); return -1; } } if (ef) { if (_zip_ef_write(za, ef, ZIP_EF_BOTH) < 0) { _zip_ef_free(ef); return -1; } } _zip_ef_free(ef); if (de->extra_fields) { if (_zip_ef_write(za, de->extra_fields, flags) < 0) { return -1; } } if ((flags & ZIP_FL_LOCAL) == 0) { if (de->comment) { if (_zip_string_write(za, de->comment) < 0) { return -1; } } } return is_zip64; } static time_t _zip_d2u_time(zip_uint16_t dtime, zip_uint16_t ddate) { struct tm tm; memset(&tm, 0, sizeof(tm)); /* let mktime decide if DST is in effect */ tm.tm_isdst = -1; tm.tm_year = ((ddate >> 9) & 127) + 1980 - 1900; tm.tm_mon = ((ddate >> 5) & 15) - 1; tm.tm_mday = ddate & 31; tm.tm_hour = (dtime >> 11) & 31; tm.tm_min = (dtime >> 5) & 63; tm.tm_sec = (dtime << 1) & 62; return mktime(&tm); } static zip_extra_field_t * _zip_ef_utf8(zip_uint16_t id, zip_string_t *str, zip_error_t *error) { const zip_uint8_t *raw; zip_uint32_t len; zip_buffer_t *buffer; zip_extra_field_t *ef; if ((raw = _zip_string_get(str, &len, ZIP_FL_ENC_RAW, NULL)) == NULL) { /* error already set */ return NULL; } if (len + 5 > ZIP_UINT16_MAX) { zip_error_set(error, ZIP_ER_INVAL, 0); /* TODO: better error code? */ return NULL; } if ((buffer = _zip_buffer_new(NULL, len + 5)) == NULL) { zip_error_set(error, ZIP_ER_MEMORY, 0); return NULL; } _zip_buffer_put_8(buffer, 1); _zip_buffer_put_32(buffer, _zip_string_crc32(str)); _zip_buffer_put(buffer, raw, len); if (!_zip_buffer_ok(buffer)) { zip_error_set(error, ZIP_ER_INTERNAL, 0); _zip_buffer_free(buffer); return NULL; } ef = _zip_ef_new(id, (zip_uint16_t)(_zip_buffer_offset(buffer)), _zip_buffer_data(buffer), ZIP_EF_BOTH); _zip_buffer_free(buffer); return ef; } zip_dirent_t * _zip_get_dirent(zip_t *za, zip_uint64_t idx, zip_flags_t flags, zip_error_t *error) { if (error == NULL) error = &za->error; if (idx >= za->nentry) { zip_error_set(error, ZIP_ER_INVAL, 0); return NULL; } if ((flags & ZIP_FL_UNCHANGED) || za->entry[idx].changes == NULL) { if (za->entry[idx].orig == NULL) { zip_error_set(error, ZIP_ER_INVAL, 0); return NULL; } if (za->entry[idx].deleted && (flags & ZIP_FL_UNCHANGED) == 0) { zip_error_set(error, ZIP_ER_DELETED, 0); return NULL; } return za->entry[idx].orig; } else return za->entry[idx].changes; } void _zip_u2d_time(time_t intime, zip_uint16_t *dtime, zip_uint16_t *ddate) { struct tm *tm; tm = localtime(&intime); if (tm == NULL) { /* if localtime() fails, return an arbitrary date (1980-01-01 00:00:00) */ *ddate = (1 << 5) + 1; *dtime = 0; return; } if (tm->tm_year < 80) { tm->tm_year = 80; } *ddate = (zip_uint16_t)(((tm->tm_year + 1900 - 1980) << 9) + ((tm->tm_mon + 1) << 5) + tm->tm_mday); *dtime = (zip_uint16_t)(((tm->tm_hour) << 11) + ((tm->tm_min) << 5) + ((tm->tm_sec) >> 1)); return; } void _zip_dirent_set_version_needed(zip_dirent_t *de, bool force_zip64) { zip_uint16_t length; if (de->comp_method == ZIP_CM_LZMA) { de->version_needed = 63; return; } if (de->comp_method == ZIP_CM_BZIP2) { de->version_needed = 46; return; } if (force_zip64 || _zip_dirent_needs_zip64(de, 0)) { de->version_needed = 45; return; } if (de->comp_method == ZIP_CM_DEFLATE || de->encryption_method == ZIP_EM_TRAD_PKWARE) { de->version_needed = 20; return; } /* directory */ if ((length = _zip_string_length(de->filename)) > 0) { if (de->filename->raw[length - 1] == '/') { de->version_needed = 20; return; } } de->version_needed = 10; } 4 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065