NAME
zip_file_set_encryption —
set
encryption method for file in zip
LIBRARY
libzip (-lzip)
SYNOPSIS
#include <zip.h>
int
zip_file_set_encryption(
zip_t
*archive,
zip_uint64_t
index,
zip_uint16_t
method,
const char
*password);
DESCRIPTION
The
zip_file_set_encryption() function sets the encryption
method for the file at position
index in the zip archive
to
method using the password
password. The
method is the same
as returned by
zip_stat(3). For the
method argument, currently only the following values are
supported:
-
-
ZIP_EM_NONE
- No encryption.
-
-
ZIP_EM_AES_128
- Winzip AES-128 encryption.
-
-
ZIP_EM_AES_192
- Winzip AES-192 encryption.
-
-
ZIP_EM_AES_256
- Winzip AES-256 encryption.
If
password is
NULL
, the default
password provided by
zip_set_default_password(3)
is used.
The current encryption method for a file in a zip archive can be determined
using
zip_stat(3).
RETURN VALUES
Upon successful completion 0 is returned. Otherwise, -1 is returned and the
error information in
archive is set to indicate the
error.
ERRORS
zip_file_set_encryption() fails if:
-
-
- [
ZIP_ER_ENCRNOTSUPP
]
- Unsupported compression method requested.
-
-
- [
ZIP_ER_INVAL
]
- index is not a valid file index in
archive, or the argument combination is
invalid.
-
-
- [
ZIP_ER_MEMORY
]
- Required memory could not be allocated.
-
-
- [
ZIP_ER_RDONLY
]
- Read-only zip file, no changes allowed.
SEE ALSO
libzip(3),
zip_set_default_password(3),
zip_stat(3)
HISTORY
zip_file_set_encryption() was added in libzip 1.2.0.
AUTHORS
Dieter Baron
<
dillo@nih.at> and
Thomas Klausner
<
tk@giga.or.at>