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mz_zip_rw.c
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/* mz_zip_rw.c -- Zip reader/writer
part of the minizip-ng project
Copyright (C) 2010-2021 Nathan Moinvaziri
https://github.com/zlib-ng/minizip-ng
This program is distributed under the terms of the same license as zlib.
See the accompanying LICENSE file for the full text of the license.
*/
#include "mz.h"
#include "mz_crypt.h"
#include "mz_os.h"
#include "mz_strm.h"
#include "mz_strm_buf.h"
#include "mz_strm_mem.h"
#include "mz_strm_os.h"
#include "mz_strm_split.h"
#include "mz_strm_wzaes.h"
#include "mz_zip.h"
#include "mz_zip_rw.h"
#include "mz_secure_api.h"
/***************************************************************************/
#define MZ_DEFAULT_PROGRESS_INTERVAL (1000u)
#define MZ_ZIP_CD_FILENAME ("__cdcd__")
/***************************************************************************/
typedef struct mz_zip_reader_s {
void *zip_handle;
void *file_stream;
void *buffered_stream;
void *split_stream;
void *mem_stream;
void *hash;
uint16_t hash_algorithm;
uint16_t hash_digest_size;
mz_zip_file *file_info;
const char *pattern;
uint8_t pattern_ignore_case;
const char *password;
void *overwrite_userdata;
mz_zip_reader_overwrite_cb
overwrite_cb;
void *password_userdata;
mz_zip_reader_password_cb
password_cb;
void *progress_userdata;
mz_zip_reader_progress_cb
progress_cb;
uint32_t progress_cb_interval_ms;
void *entry_userdata;
mz_zip_reader_entry_cb
entry_cb;
uint8_t raw;
uint8_t buffer[UINT16_MAX];
int32_t encoding;
uint8_t sign_required;
uint8_t cd_verified;
uint8_t cd_zipped;
uint8_t entry_verified;
uint8_t recover;
} mz_zip_reader;
/***************************************************************************/
int32_t mz_zip_reader_is_open(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (reader == NULL)
return MZ_PARAM_ERROR;
if (reader->zip_handle == NULL)
return MZ_PARAM_ERROR;
return MZ_OK;
}
int32_t mz_zip_reader_open(void *handle, void *stream) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
reader->cd_verified = 0;
reader->cd_zipped = 0;
mz_zip_create(&reader->zip_handle);
mz_zip_set_recover(reader->zip_handle, reader->recover);
err = mz_zip_open(reader->zip_handle, stream, MZ_OPEN_MODE_READ);
if (err != MZ_OK) {
mz_zip_reader_close(handle);
return err;
}
mz_zip_reader_unzip_cd(reader);
return MZ_OK;
}
int32_t mz_zip_reader_open_file(void *handle, const char *path) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
mz_zip_reader_close(handle);
mz_stream_os_create(&reader->file_stream);
mz_stream_buffered_create(&reader->buffered_stream);
mz_stream_split_create(&reader->split_stream);
mz_stream_set_base(reader->buffered_stream, reader->file_stream);
mz_stream_set_base(reader->split_stream, reader->buffered_stream);
err = mz_stream_open(reader->split_stream, path, MZ_OPEN_MODE_READ);
if (err == MZ_OK)
err = mz_zip_reader_open(handle, reader->split_stream);
return err;
}
int32_t mz_zip_reader_open_file_in_memory(void *handle, const char *path) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
void *file_stream = NULL;
int64_t file_size = 0;
int32_t err = 0;
mz_zip_reader_close(handle);
mz_stream_os_create(&file_stream);
err = mz_stream_os_open(file_stream, path, MZ_OPEN_MODE_READ);
if (err != MZ_OK) {
mz_stream_os_delete(&file_stream);
mz_zip_reader_close(handle);
return err;
}
mz_stream_os_seek(file_stream, 0, MZ_SEEK_END);
file_size = mz_stream_os_tell(file_stream);
mz_stream_os_seek(file_stream, 0, MZ_SEEK_SET);
if ((file_size <= 0) || (file_size > UINT32_MAX)) {
/* Memory size is too large or too small */
mz_stream_os_close(file_stream);
mz_stream_os_delete(&file_stream);
mz_zip_reader_close(handle);
return MZ_MEM_ERROR;
}
mz_stream_mem_create(&reader->mem_stream);
mz_stream_mem_set_grow_size(reader->mem_stream, (int32_t)file_size);
mz_stream_mem_open(reader->mem_stream, NULL, MZ_OPEN_MODE_CREATE);
err = mz_stream_copy(reader->mem_stream, file_stream, (int32_t)file_size);
mz_stream_os_close(file_stream);
mz_stream_os_delete(&file_stream);
if (err == MZ_OK)
err = mz_zip_reader_open(handle, reader->mem_stream);
if (err != MZ_OK)
mz_zip_reader_close(handle);
return err;
}
int32_t mz_zip_reader_open_buffer(void *handle, uint8_t *buf, int32_t len, uint8_t copy) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
mz_zip_reader_close(handle);
mz_stream_mem_create(&reader->mem_stream);
if (copy) {
mz_stream_mem_set_grow_size(reader->mem_stream, len);
mz_stream_mem_open(reader->mem_stream, NULL, MZ_OPEN_MODE_CREATE);
mz_stream_mem_write(reader->mem_stream, buf, len);
mz_stream_mem_seek(reader->mem_stream, 0, MZ_SEEK_SET);
} else {
mz_stream_mem_open(reader->mem_stream, NULL, MZ_OPEN_MODE_READ);
mz_stream_mem_set_buffer(reader->mem_stream, buf, len);
}
if (err == MZ_OK)
err = mz_zip_reader_open(handle, reader->mem_stream);
return err;
}
int32_t mz_zip_reader_close(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
if (reader->zip_handle != NULL) {
err = mz_zip_close(reader->zip_handle);
mz_zip_delete(&reader->zip_handle);
}
if (reader->split_stream != NULL) {
mz_stream_split_close(reader->split_stream);
mz_stream_split_delete(&reader->split_stream);
}
if (reader->buffered_stream != NULL)
mz_stream_buffered_delete(&reader->buffered_stream);
if (reader->file_stream != NULL)
mz_stream_os_delete(&reader->file_stream);
if (reader->mem_stream != NULL) {
mz_stream_mem_close(reader->mem_stream);
mz_stream_mem_delete(&reader->mem_stream);
}
return err;
}
/***************************************************************************/
int32_t mz_zip_reader_unzip_cd(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
mz_zip_file *cd_info = NULL;
void *cd_mem_stream = NULL;
void *new_cd_stream = NULL;
void *file_extra_stream = NULL;
uint64_t number_entry = 0;
int32_t err = MZ_OK;
err = mz_zip_reader_goto_first_entry(handle);
if (err != MZ_OK)
return err;
err = mz_zip_reader_entry_get_info(handle, &cd_info);
if (err != MZ_OK)
return err;
if (strcmp(cd_info->filename, MZ_ZIP_CD_FILENAME) != 0)
return mz_zip_reader_goto_first_entry(handle);
err = mz_zip_reader_entry_open(handle);
if (err != MZ_OK)
return err;
mz_stream_mem_create(&file_extra_stream);
mz_stream_mem_set_buffer(file_extra_stream, (void *)cd_info->extrafield, cd_info->extrafield_size);
err = mz_zip_extrafield_find(file_extra_stream, MZ_ZIP_EXTENSION_CDCD, INT32_MAX, NULL);
if (err == MZ_OK)
err = mz_stream_read_uint64(file_extra_stream, &number_entry);
mz_stream_mem_delete(&file_extra_stream);
if (err != MZ_OK)
return err;
mz_zip_get_cd_mem_stream(reader->zip_handle, &cd_mem_stream);
if (mz_stream_mem_is_open(cd_mem_stream) != MZ_OK)
mz_stream_mem_open(cd_mem_stream, NULL, MZ_OPEN_MODE_CREATE);
err = mz_stream_seek(cd_mem_stream, 0, MZ_SEEK_SET);
if (err == MZ_OK)
err = mz_stream_copy_stream(cd_mem_stream, NULL, handle, mz_zip_reader_entry_read,
(int32_t)cd_info->uncompressed_size);
if (err == MZ_OK) {
reader->cd_zipped = 1;
mz_zip_set_cd_stream(reader->zip_handle, 0, cd_mem_stream);
mz_zip_set_number_entry(reader->zip_handle, number_entry);
err = mz_zip_reader_goto_first_entry(handle);
}
reader->cd_verified = reader->entry_verified;
mz_stream_mem_delete(&new_cd_stream);
return err;
}
/***************************************************************************/
static int32_t mz_zip_reader_locate_entry_cb(void *handle, void *userdata, mz_zip_file *file_info) {
mz_zip_reader *reader = (mz_zip_reader *)userdata;
int32_t result = 0;
MZ_UNUSED(handle);
result = mz_path_compare_wc(file_info->filename, reader->pattern, reader->pattern_ignore_case);
return result;
}
int32_t mz_zip_reader_goto_first_entry(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
if (mz_zip_reader_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
if (mz_zip_entry_is_open(reader->zip_handle) == MZ_OK)
mz_zip_reader_entry_close(handle);
if (reader->pattern == NULL)
err = mz_zip_goto_first_entry(reader->zip_handle);
else
err = mz_zip_locate_first_entry(reader->zip_handle, reader, mz_zip_reader_locate_entry_cb);
reader->file_info = NULL;
if (err == MZ_OK)
err = mz_zip_entry_get_info(reader->zip_handle, &reader->file_info);
return err;
}
int32_t mz_zip_reader_goto_next_entry(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
if (mz_zip_reader_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
if (mz_zip_entry_is_open(reader->zip_handle) == MZ_OK)
mz_zip_reader_entry_close(handle);
if (reader->pattern == NULL)
err = mz_zip_goto_next_entry(reader->zip_handle);
else
err = mz_zip_locate_next_entry(reader->zip_handle, reader, mz_zip_reader_locate_entry_cb);
reader->file_info = NULL;
if (err == MZ_OK)
err = mz_zip_entry_get_info(reader->zip_handle, &reader->file_info);
return err;
}
int32_t mz_zip_reader_locate_entry(void *handle, const char *filename, uint8_t ignore_case) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
if (mz_zip_entry_is_open(reader->zip_handle) == MZ_OK)
mz_zip_reader_entry_close(handle);
err = mz_zip_locate_entry(reader->zip_handle, filename, ignore_case);
reader->file_info = NULL;
if (err == MZ_OK)
err = mz_zip_entry_get_info(reader->zip_handle, &reader->file_info);
return err;
}
/***************************************************************************/
int32_t mz_zip_reader_entry_open(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
const char *password = NULL;
char password_buf[120];
reader->entry_verified = 0;
if (mz_zip_reader_is_open(reader) != MZ_OK)
return MZ_PARAM_ERROR;
if (reader->file_info == NULL)
return MZ_PARAM_ERROR;
/* If the entry isn't open for reading, open it */
if (mz_zip_entry_is_open(reader->zip_handle) == MZ_OK)
return MZ_OK;
password = reader->password;
/* Check if we need a password and ask for it if we need to */
if ((reader->file_info->flag & MZ_ZIP_FLAG_ENCRYPTED) && (password == NULL) &&
(reader->password_cb != NULL)) {
reader->password_cb(handle, reader->password_userdata, reader->file_info,
password_buf, sizeof(password_buf));
password = password_buf;
}
err = mz_zip_entry_read_open(reader->zip_handle, reader->raw, password);
#ifndef MZ_ZIP_NO_CRYPTO
if (err != MZ_OK)
return err;
if (mz_zip_reader_entry_get_first_hash(handle, &reader->hash_algorithm, &reader->hash_digest_size) == MZ_OK) {
mz_crypt_sha_create(&reader->hash);
if (reader->hash_algorithm == MZ_HASH_SHA1)
mz_crypt_sha_set_algorithm(reader->hash, MZ_HASH_SHA1);
else if (reader->hash_algorithm == MZ_HASH_SHA256)
mz_crypt_sha_set_algorithm(reader->hash, MZ_HASH_SHA256);
else
err = MZ_SUPPORT_ERROR;
if (err == MZ_OK)
mz_crypt_sha_begin(reader->hash);
#ifdef MZ_ZIP_SIGNING
if (err == MZ_OK) {
if (mz_zip_reader_entry_has_sign(handle) == MZ_OK) {
err = mz_zip_reader_entry_sign_verify(handle);
if (err == MZ_OK)
reader->entry_verified = 1;
} else if (reader->sign_required && !reader->cd_verified)
err = MZ_SIGN_ERROR;
}
#endif
} else if (reader->sign_required && !reader->cd_verified)
err = MZ_SIGN_ERROR;
#endif
return err;
}
int32_t mz_zip_reader_entry_close(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
int32_t err_close = MZ_OK;
#ifndef MZ_ZIP_NO_CRYPTO
int32_t err_hash = MZ_OK;
uint8_t computed_hash[MZ_HASH_MAX_SIZE];
uint8_t expected_hash[MZ_HASH_MAX_SIZE];
if (reader->hash != NULL) {
mz_crypt_sha_end(reader->hash, computed_hash, sizeof(computed_hash));
mz_crypt_sha_delete(&reader->hash);
err_hash = mz_zip_reader_entry_get_hash(handle, reader->hash_algorithm, expected_hash,
reader->hash_digest_size);
if (err_hash == MZ_OK) {
/* Verify expected hash against computed hash */
if (memcmp(computed_hash, expected_hash, reader->hash_digest_size) != 0)
err = MZ_CRC_ERROR;
}
}
#endif
err_close = mz_zip_entry_close(reader->zip_handle);
if (err == MZ_OK)
err = err_close;
return err;
}
int32_t mz_zip_reader_entry_read(void *handle, void *buf, int32_t len) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t read = 0;
read = mz_zip_entry_read(reader->zip_handle, buf, len);
#ifndef MZ_ZIP_NO_CRYPTO
if ((read > 0) && (reader->hash != NULL))
mz_crypt_sha_update(reader->hash, buf, read);
#endif
return read;
}
int32_t mz_zip_reader_entry_has_sign(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (reader == NULL || mz_zip_entry_is_open(reader->zip_handle) != MZ_OK)
return MZ_PARAM_ERROR;
return mz_zip_extrafield_contains(reader->file_info->extrafield,
reader->file_info->extrafield_size, MZ_ZIP_EXTENSION_SIGN, NULL);
}
#if !defined(MZ_ZIP_NO_CRYPTO) && defined(MZ_ZIP_SIGNING)
int32_t mz_zip_reader_entry_sign_verify(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
void *file_extra_stream = NULL;
int32_t err = MZ_OK;
uint8_t *signature = NULL;
uint16_t signature_size = 0;
uint8_t hash[MZ_HASH_MAX_SIZE];
if (reader == NULL || mz_zip_entry_is_open(reader->zip_handle) != MZ_OK)
return MZ_PARAM_ERROR;
mz_stream_mem_create(&file_extra_stream);
mz_stream_mem_set_buffer(file_extra_stream, (void *)reader->file_info->extrafield,
reader->file_info->extrafield_size);
err = mz_zip_extrafield_find(file_extra_stream, MZ_ZIP_EXTENSION_SIGN, INT32_MAX, &signature_size);
if ((err == MZ_OK) && (signature_size > 0)) {
signature = (uint8_t *)MZ_ALLOC(signature_size);
if (mz_stream_read(file_extra_stream, signature, signature_size) != signature_size)
err = MZ_READ_ERROR;
}
mz_stream_mem_delete(&file_extra_stream);
if (err == MZ_OK) {
/* Get most secure hash to verify signature against */
err = mz_zip_reader_entry_get_hash(handle, reader->hash_algorithm, hash, reader->hash_digest_size);
}
if (err == MZ_OK) {
/* Verify the pkcs signature */
err = mz_crypt_sign_verify(hash, reader->hash_digest_size, signature, signature_size);
}
if (signature != NULL)
MZ_FREE(signature);
return err;
}
#endif
int32_t mz_zip_reader_entry_get_hash(void *handle, uint16_t algorithm, uint8_t *digest, int32_t digest_size) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
void *file_extra_stream = NULL;
int32_t err = MZ_OK;
int32_t return_err = MZ_EXIST_ERROR;
uint16_t cur_algorithm = 0;
uint16_t cur_digest_size = 0;
mz_stream_mem_create(&file_extra_stream);
mz_stream_mem_set_buffer(file_extra_stream, (void *)reader->file_info->extrafield,
reader->file_info->extrafield_size);
do {
err = mz_zip_extrafield_find(file_extra_stream, MZ_ZIP_EXTENSION_HASH, INT32_MAX, NULL);
if (err != MZ_OK)
break;
err = mz_stream_read_uint16(file_extra_stream, &cur_algorithm);
if (err == MZ_OK)
err = mz_stream_read_uint16(file_extra_stream, &cur_digest_size);
if ((err == MZ_OK) && (cur_algorithm == algorithm) && (cur_digest_size <= digest_size) &&
(cur_digest_size <= MZ_HASH_MAX_SIZE)) {
/* Read hash digest */
if (mz_stream_read(file_extra_stream, digest, digest_size) == cur_digest_size)
return_err = MZ_OK;
break;
} else {
err = mz_stream_seek(file_extra_stream, cur_digest_size, MZ_SEEK_CUR);
}
} while (err == MZ_OK);
mz_stream_mem_delete(&file_extra_stream);
return return_err;
}
int32_t mz_zip_reader_entry_get_first_hash(void *handle, uint16_t *algorithm, uint16_t *digest_size) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
void *file_extra_stream = NULL;
int32_t err = MZ_OK;
uint16_t cur_algorithm = 0;
uint16_t cur_digest_size = 0;
if (reader == NULL || algorithm == NULL)
return MZ_PARAM_ERROR;
mz_stream_mem_create(&file_extra_stream);
mz_stream_mem_set_buffer(file_extra_stream, (void *)reader->file_info->extrafield,
reader->file_info->extrafield_size);
err = mz_zip_extrafield_find(file_extra_stream, MZ_ZIP_EXTENSION_HASH, INT32_MAX, NULL);
if (err == MZ_OK)
err = mz_stream_read_uint16(file_extra_stream, &cur_algorithm);
if (err == MZ_OK)
err = mz_stream_read_uint16(file_extra_stream, &cur_digest_size);
if (algorithm != NULL)
*algorithm = cur_algorithm;
if (digest_size != NULL)
*digest_size = cur_digest_size;
mz_stream_mem_delete(&file_extra_stream);
return err;
}
int32_t mz_zip_reader_entry_get_info(void *handle, mz_zip_file **file_info) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
if (file_info == NULL || mz_zip_reader_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
*file_info = reader->file_info;
if (*file_info == NULL)
return MZ_EXIST_ERROR;
return err;
}
int32_t mz_zip_reader_entry_is_dir(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (mz_zip_reader_is_open(handle) != MZ_OK)
return MZ_PARAM_ERROR;
return mz_zip_entry_is_dir(reader->zip_handle);
}
int32_t mz_zip_reader_entry_save_process(void *handle, void *stream, mz_stream_write_cb write_cb) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
int32_t read = 0;
int32_t written = 0;
if (mz_zip_reader_is_open(reader) != MZ_OK)
return MZ_PARAM_ERROR;
if (reader->file_info == NULL)
return MZ_PARAM_ERROR;
if (write_cb == NULL)
return MZ_PARAM_ERROR;
/* If the entry isn't open for reading, open it */
if (mz_zip_entry_is_open(reader->zip_handle) != MZ_OK)
err = mz_zip_reader_entry_open(handle);
if (err != MZ_OK)
return err;
/* Unzip entry in zip file */
read = mz_zip_reader_entry_read(handle, reader->buffer, sizeof(reader->buffer));
if (read == 0) {
/* If we are done close the entry */
err = mz_zip_reader_entry_close(handle);
if (err != MZ_OK)
return err;
return MZ_END_OF_STREAM;
}
if (read > 0) {
/* Write the data to the specified stream */
written = write_cb(stream, reader->buffer, read);
if (written != read)
return MZ_WRITE_ERROR;
}
return read;
}
int32_t mz_zip_reader_entry_save(void *handle, void *stream, mz_stream_write_cb write_cb) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
uint64_t current_time = 0;
uint64_t update_time = 0;
int64_t current_pos = 0;
int64_t update_pos = 0;
int32_t err = MZ_OK;
int32_t written = 0;
if (mz_zip_reader_is_open(reader) != MZ_OK)
return MZ_PARAM_ERROR;
if (reader->file_info == NULL)
return MZ_PARAM_ERROR;
/* Update the progress at the beginning */
if (reader->progress_cb != NULL)
reader->progress_cb(handle, reader->progress_userdata, reader->file_info, current_pos);
/* Write data to stream until done */
while (err == MZ_OK) {
written = mz_zip_reader_entry_save_process(handle, stream, write_cb);
if (written == MZ_END_OF_STREAM)
break;
if (written > 0)
current_pos += written;
if (written < 0)
err = written;
/* Update progress if enough time have passed */
current_time = mz_os_ms_time();
if ((current_time - update_time) > reader->progress_cb_interval_ms) {
if (reader->progress_cb != NULL)
reader->progress_cb(handle, reader->progress_userdata, reader->file_info, current_pos);
update_pos = current_pos;
update_time = current_time;
}
}
/* Update the progress at the end */
if (reader->progress_cb != NULL && update_pos != current_pos)
reader->progress_cb(handle, reader->progress_userdata, reader->file_info, current_pos);
return err;
}
int32_t mz_zip_reader_entry_save_file(void *handle, const char *path) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
void *stream = NULL;
uint32_t target_attrib = 0;
int32_t err_attrib = 0;
int32_t err = MZ_OK;
int32_t err_cb = MZ_OK;
char pathwfs[512];
char directory[512];
if (mz_zip_reader_is_open(reader) != MZ_OK)
return MZ_PARAM_ERROR;
if (reader->file_info == NULL || path == NULL)
return MZ_PARAM_ERROR;
/* Convert to forward slashes for unix which doesn't like backslashes */
strncpy(pathwfs, path, sizeof(pathwfs) - 1);
pathwfs[sizeof(pathwfs) - 1] = 0;
mz_path_convert_slashes(pathwfs, MZ_PATH_SLASH_UNIX);
if (reader->entry_cb != NULL)
reader->entry_cb(handle, reader->entry_userdata, reader->file_info, pathwfs);
strncpy(directory, pathwfs, sizeof(directory) - 1);
directory[sizeof(directory) - 1] = 0;
mz_path_remove_filename(directory);
/* If it is a directory entry then create a directory instead of writing file */
if ((mz_zip_entry_is_dir(reader->zip_handle) == MZ_OK) &&
(mz_zip_entry_is_symlink(reader->zip_handle) != MZ_OK)) {
err = mz_dir_make(directory);
return err;
}
/* Check if file exists and ask if we want to overwrite */
if ((mz_os_file_exists(pathwfs) == MZ_OK) && (reader->overwrite_cb != NULL)) {
err_cb = reader->overwrite_cb(handle, reader->overwrite_userdata, reader->file_info, pathwfs);
if (err_cb != MZ_OK)
return err;
/* We want to overwrite the file so we delete the existing one */
mz_os_unlink(pathwfs);
}
/* If symbolic link then properly construct destination path and link path */
if (mz_zip_entry_is_symlink(reader->zip_handle) == MZ_OK) {
mz_path_remove_slash(pathwfs);
mz_path_remove_filename(directory);
}
/* Create the output directory if it doesn't already exist */
if (mz_os_is_dir(directory) != MZ_OK) {
err = mz_dir_make(directory);
if (err != MZ_OK)
return err;
}
/* If it is a symbolic link then create symbolic link instead of writing file */
if (mz_zip_entry_is_symlink(reader->zip_handle) == MZ_OK) {
mz_os_make_symlink(pathwfs, reader->file_info->linkname);
/* Don't check return value because we aren't validating symbolic link target */
return err;
}
/* Create the file on disk so we can save to it */
mz_stream_os_create(&stream);
err = mz_stream_os_open(stream, pathwfs, MZ_OPEN_MODE_CREATE);
if (err == MZ_OK)
err = mz_zip_reader_entry_save(handle, stream, mz_stream_write);
mz_stream_close(stream);
mz_stream_delete(&stream);
if (err == MZ_OK) {
/* Set the time of the file that has been created */
mz_os_set_file_date(pathwfs, reader->file_info->modified_date,
reader->file_info->accessed_date, reader->file_info->creation_date);
}
if (err == MZ_OK) {
/* Set file attributes for the correct system */
err_attrib = mz_zip_attrib_convert(MZ_HOST_SYSTEM(reader->file_info->version_madeby),
reader->file_info->external_fa, MZ_VERSION_MADEBY_HOST_SYSTEM, &target_attrib);
if (err_attrib == MZ_OK)
mz_os_set_file_attribs(pathwfs, target_attrib);
}
return err;
}
int32_t mz_zip_reader_entry_save_buffer(void *handle, void *buf, int32_t len) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
void *mem_stream = NULL;
int32_t err = MZ_OK;
if (mz_zip_reader_is_open(reader) != MZ_OK)
return MZ_PARAM_ERROR;
if (reader->file_info == NULL)
return MZ_PARAM_ERROR;
if (reader->file_info->uncompressed_size > INT32_MAX)
return MZ_PARAM_ERROR;
if (len != (int32_t)reader->file_info->uncompressed_size)
return MZ_BUF_ERROR;
/* Create a memory stream backed by our buffer and save to it */
mz_stream_mem_create(&mem_stream);
mz_stream_mem_set_buffer(mem_stream, buf, len);
err = mz_stream_mem_open(mem_stream, NULL, MZ_OPEN_MODE_READ);
if (err == MZ_OK)
err = mz_zip_reader_entry_save(handle, mem_stream, mz_stream_mem_write);
mz_stream_mem_delete(&mem_stream);
return err;
}
int32_t mz_zip_reader_entry_save_buffer_length(void *handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (mz_zip_reader_is_open(reader) != MZ_OK)
return MZ_PARAM_ERROR;
if (reader->file_info == NULL)
return MZ_PARAM_ERROR;
if (reader->file_info->uncompressed_size > INT32_MAX)
return MZ_PARAM_ERROR;
/* Get the maximum size required for the save buffer */
return (int32_t)reader->file_info->uncompressed_size;
}
/***************************************************************************/
int32_t mz_zip_reader_save_all(void *handle, const char *destination_dir) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
int32_t err = MZ_OK;
uint8_t *utf8_string = NULL;
char path[512];
char utf8_name[256];
char resolved_name[256];
err = mz_zip_reader_goto_first_entry(handle);
if (err == MZ_END_OF_LIST)
return err;
while (err == MZ_OK) {
/* Construct output path */
path[0] = 0;
strncpy(utf8_name, reader->file_info->filename, sizeof(utf8_name) - 1);
utf8_name[sizeof(utf8_name) - 1] = 0;
if ((reader->encoding > 0) && (reader->file_info->flag & MZ_ZIP_FLAG_UTF8) == 0) {
utf8_string = mz_os_utf8_string_create(reader->file_info->filename, reader->encoding);
if (utf8_string) {
strncpy(utf8_name, (char *)utf8_string, sizeof(utf8_name) - 1);
utf8_name[sizeof(utf8_name) - 1] = 0;
mz_os_utf8_string_delete(&utf8_string);
}
}
err = mz_path_resolve(utf8_name, resolved_name, sizeof(resolved_name));
if (err != MZ_OK)
break;
if (destination_dir != NULL)
mz_path_combine(path, destination_dir, sizeof(path));
mz_path_combine(path, resolved_name, sizeof(path));
/* Save file to disk */
err = mz_zip_reader_entry_save_file(handle, path);
if (err == MZ_OK)
err = mz_zip_reader_goto_next_entry(handle);
}
if (err == MZ_END_OF_LIST)
return MZ_OK;
return err;
}
/***************************************************************************/
void mz_zip_reader_set_pattern(void *handle, const char *pattern, uint8_t ignore_case) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->pattern = pattern;
reader->pattern_ignore_case = ignore_case;
}
void mz_zip_reader_set_password(void *handle, const char *password) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->password = password;
}
void mz_zip_reader_set_raw(void *handle, uint8_t raw) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->raw = raw;
}
int32_t mz_zip_reader_get_raw(void *handle, uint8_t *raw) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (raw == NULL)
return MZ_PARAM_ERROR;
*raw = reader->raw;
return MZ_OK;
}
int32_t mz_zip_reader_get_zip_cd(void *handle, uint8_t *zip_cd) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (zip_cd == NULL)
return MZ_PARAM_ERROR;
*zip_cd = reader->cd_zipped;
return MZ_OK;
}
int32_t mz_zip_reader_get_comment(void *handle, const char **comment) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (mz_zip_reader_is_open(reader) != MZ_OK)
return MZ_PARAM_ERROR;
if (comment == NULL)
return MZ_PARAM_ERROR;
return mz_zip_get_comment(reader->zip_handle, comment);
}
int32_t mz_zip_reader_set_recover(void *handle, uint8_t recover) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (reader == NULL)
return MZ_PARAM_ERROR;
reader->recover = recover;
return MZ_OK;
}
void mz_zip_reader_set_encoding(void *handle, int32_t encoding) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->encoding = encoding;
}
void mz_zip_reader_set_sign_required(void *handle, uint8_t sign_required) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->sign_required = sign_required;
}
void mz_zip_reader_set_overwrite_cb(void *handle, void *userdata, mz_zip_reader_overwrite_cb cb) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->overwrite_cb = cb;
reader->overwrite_userdata = userdata;
}
void mz_zip_reader_set_password_cb(void *handle, void *userdata, mz_zip_reader_password_cb cb) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->password_cb = cb;
reader->password_userdata = userdata;
}
void mz_zip_reader_set_progress_cb(void *handle, void *userdata, mz_zip_reader_progress_cb cb) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->progress_cb = cb;
reader->progress_userdata = userdata;
}
void mz_zip_reader_set_progress_interval(void *handle, uint32_t milliseconds) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->progress_cb_interval_ms = milliseconds;
}
void mz_zip_reader_set_entry_cb(void *handle, void *userdata, mz_zip_reader_entry_cb cb) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
reader->entry_cb = cb;
reader->entry_userdata = userdata;
}
int32_t mz_zip_reader_get_zip_handle(void *handle, void **zip_handle) {
mz_zip_reader *reader = (mz_zip_reader *)handle;
if (zip_handle == NULL)
return MZ_PARAM_ERROR;
*zip_handle = reader->zip_handle;
if (*zip_handle == NULL)
return MZ_EXIST_ERROR;
return MZ_OK;
}
/***************************************************************************/
void *mz_zip_reader_create(void **handle) {
mz_zip_reader *reader = NULL;
reader = (mz_zip_reader *)MZ_ALLOC(sizeof(mz_zip_reader));
if (reader != NULL) {
memset(reader, 0, sizeof(mz_zip_reader));
reader->recover = 1;
reader->progress_cb_interval_ms = MZ_DEFAULT_PROGRESS_INTERVAL;
}
if (handle != NULL)
*handle = reader;
return reader;
}
void mz_zip_reader_delete(void **handle) {
mz_zip_reader *reader = NULL;
if (handle == NULL)
return;
reader = (mz_zip_reader *)*handle;
if (reader != NULL) {
mz_zip_reader_close(reader);
MZ_FREE(reader);
}
*handle = NULL;
}
/***************************************************************************/
typedef struct mz_zip_writer_s {
void *zip_handle;