ZIP_EXTERN struct zip_file *
zip_fopen_index_encrypted(struct zip *za, zip_uint64_t index, zip_flags_t flags,
const char *password)
{
struct zip_file *zf;
struct zip_source *src;
if ((src=_zip_source_zip_new(za, za, index, flags, 0, 0, password)) == NULL)
return NULL;
if (zip_source_open(src) < 0) {
_zip_error_set_from_source(&za->error, src);
zip_source_free(src);
return NULL;
}
if ((zf=_zip_file_new(za)) == NULL) {
zip_source_free(src);
return NULL;
}
zf->src = src;
return zf;
}
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;
}
ZIP_EXTERN struct zip_file *
zip_fopen_index(struct zip *za, int fileno, int flags)
{
int len, ret;
int zfflags;
struct zip_file *zf;
if ((fileno < 0) || (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;
}
zfflags = 0;
switch (za->cdir->entry[fileno].comp_method) {
case ZIP_CM_STORE:
zfflags |= ZIP_ZF_CRC;
break;
case ZIP_CM_DEFLATE:
if ((flags & ZIP_FL_COMPRESSED) == 0)
zfflags |= ZIP_ZF_CRC | ZIP_ZF_DECOMP;
break;
default:
if ((flags & ZIP_FL_COMPRESSED) == 0) {
_zip_error_set(&za->error, ZIP_ER_COMPNOTSUPP, 0);
return NULL;
}
break;
}
zf = _zip_file_new(za);
zf->flags = zfflags;
/* zf->name = za->cdir->entry[fileno].filename; */
zf->method = za->cdir->entry[fileno].comp_method;
zf->bytes_left = za->cdir->entry[fileno].uncomp_size;
zf->cbytes_left = za->cdir->entry[fileno].comp_size;
zf->crc_orig = za->cdir->entry[fileno].crc;
if ((zf->fpos=_zip_file_get_offset(za, fileno)) == 0) {
zip_fclose(zf);
return NULL;
}
if ((zf->flags & ZIP_ZF_DECOMP) == 0)
zf->bytes_left = zf->cbytes_left;
else {
if ((zf->buffer=(char *)malloc(BUFSIZE)) == NULL) {
_zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
zip_fclose(zf);
return NULL;
}
len = _zip_file_fillbuf(zf->buffer, BUFSIZE, zf);
if (len <= 0) {
_zip_error_copy(&za->error, &zf->error);
zip_fclose(zf);
return NULL;
}
if ((zf->zstr = (z_stream *)malloc(sizeof(z_stream))) == NULL) {
_zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
zip_fclose(zf);
return NULL;
}
zf->zstr->zalloc = Z_NULL;
zf->zstr->zfree = Z_NULL;
zf->zstr->opaque = NULL;
zf->zstr->next_in = (Bytef *)zf->buffer;
zf->zstr->avail_in = len;
/* negative value to tell zlib that there is no header */
if ((ret=inflateInit2(zf->zstr, -MAX_WBITS)) != Z_OK) {
_zip_error_set(&za->error, ZIP_ER_ZLIB, ret);
zip_fclose(zf);
return NULL;
}
}
return zf;
}
