zip_file_set_encryption3
Set encryption method for file in zip
Usage
#include <zip.h>
int
zip_file_set_encryption(zip_t *archive, zip_uint64_t index, zip_uint16_t method, const char *password);
Library
libzip (-lzip)
Overview
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.
- ZIP_EM_TRAD_PKWARE
-
Traditional PKWare encryption. Do not use this method, it is not secure. It is only provided for backwards compatibility.
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.
Releases
5 releases since Debian 10 (Buster); the text changed 2 times.