| .\" Automatically generated from an mdoc input file. Do not edit. |
| .\" zip_file_set_encryption.mdoc -- set encryption method for file |
| .\" Copyright (C) 2016-2021 Dieter Baron and Thomas Klausner |
| .\" |
| .\" This file is part of libzip, a library to manipulate ZIP files. |
| .\" The authors can be contacted at <libzip@nih.at> |
| .\" |
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| .TH "ZIP_FILE_SET_ENCRYPTION" "3" "April 2, 2020" "NiH" "Library Functions Manual" |
| .nh |
| .if n .ad l |
| .SH "NAME" |
| \fBzip_file_set_encryption\fR |
| \- set encryption method for file in zip |
| .SH "LIBRARY" |
| libzip (-lzip) |
| .SH "SYNOPSIS" |
| \fB#include <zip.h>\fR |
| .sp |
| \fIint\fR |
| .br |
| .PD 0 |
| .HP 4n |
| \fBzip_file_set_encryption\fR(\fIzip_t\ *archive\fR, \fIzip_uint64_t\ index\fR, \fIzip_uint16_t\ method\fR, \fIconst\ char\ *password\fR); |
| .PD |
| .SH "DESCRIPTION" |
| The |
| \fBzip_file_set_encryption\fR() |
| function sets the encryption method for the file at position |
| \fIindex\fR |
| in the zip archive to |
| \fImethod\fR |
| using the password |
| \fIpassword\fR. |
| The |
| \fImethod\fR |
| is the same as returned by |
| zip_stat(3). |
| For the |
| \fImethod\fR |
| argument, currently only the following values are supported: |
| .TP 19n |
| \fRZIP_EM_NONE\fR |
| No encryption. |
| .TP 19n |
| \fRZIP_EM_AES_128\fR |
| Winzip AES-128 encryption. |
| .TP 19n |
| \fRZIP_EM_AES_192\fR |
| Winzip AES-192 encryption. |
| .TP 19n |
| \fRZIP_EM_AES_256\fR |
| Winzip AES-256 encryption. |
| .TP 19n |
| \fRZIP_EM_TRAD_PKWARE\fR |
| .br |
| Traditional PKWare encryption. |
| Do not use this method, it is not secure. |
| It is only provided for backwards compatibility. |
| .PP |
| If |
| \fIpassword\fR |
| is |
| \fRNULL\fR, |
| the default password provided by |
| zip_set_default_password(3) |
| is used. |
| .PP |
| The current encryption method for a file in a zip archive can be |
| determined using |
| zip_stat(3). |
| .SH "RETURN VALUES" |
| Upon successful completion 0 is returned. |
| Otherwise, \-1 is returned and the error information in |
| \fIarchive\fR |
| is set to indicate the error. |
| .SH "ERRORS" |
| \fBzip_file_set_encryption\fR() |
| fails if: |
| .TP 19n |
| [\fRZIP_ER_ENCRNOTSUPP\fR] |
| Unsupported compression method requested. |
| .TP 19n |
| [\fRZIP_ER_INVAL\fR] |
| \fIindex\fR |
| is not a valid file index in |
| \fIarchive\fR, |
| or the argument combination is invalid. |
| .TP 19n |
| [\fRZIP_ER_MEMORY\fR] |
| Required memory could not be allocated. |
| .TP 19n |
| [\fRZIP_ER_RDONLY\fR] |
| Read-only zip file, no changes allowed. |
| .SH "SEE ALSO" |
| libzip(3), |
| zip_encryption_method_supported(3), |
| zip_fopen_encrypted(3), |
| zip_fopen_index_encrypted(3), |
| zip_set_default_password(3), |
| zip_stat(3) |
| .SH "HISTORY" |
| \fBzip_file_set_encryption\fR() |
| was added in libzip 1.2.0. |
| .SH "AUTHORS" |
| Dieter Baron <\fIdillo@nih.at\fR> |
| and |
| Thomas Klausner <\fItk@giga.or.at\fR> |