| .\" zip_file_set_encryption.mdoc -- set encryption method for file |
| .\" Copyright (C) 2016-2017 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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| .Dd December 18, 2017 |
| .Dt ZIP_FILE_SET_ENCRYPTION 3 |
| .Os |
| .Sh NAME |
| .Nm zip_file_set_encryption |
| .Nd set encryption method for file in zip |
| .Sh LIBRARY |
| libzip (-lzip) |
| .Sh SYNOPSIS |
| .In zip.h |
| .Ft int |
| .Fn zip_file_set_encryption "zip_t *archive" "zip_uint64_t index" "zip_uint16_t method" "const char *password" |
| .Sh DESCRIPTION |
| The |
| .Fn zip_file_set_encryption |
| function sets the encryption method for the file at position |
| .Ar index |
| in the zip archive to |
| .Ar method |
| using the password |
| .Ar password . |
| The |
| .Ar method |
| is the same as returned by |
| .Xr zip_stat 3 . |
| For the |
| .Ar method |
| argument, currently only the following values are supported: |
| .Bl -tag -width ZIP_CM_DEFLATE_XX |
| .It Dv ZIP_EM_NONE |
| No encryption. |
| .It Dv ZIP_EM_AES_128 |
| Winzip AES-128 encryption. |
| .It Dv ZIP_EM_AES_192 |
| Winzip AES-192 encryption. |
| .It Dv ZIP_EM_AES_256 |
| Winzip AES-256 encryption. |
| .El |
| .Pp |
| If |
| .Ar password |
| is |
| .Dv NULL , |
| the default password provided by |
| .Xr zip_set_default_password 3 |
| is used. |
| .Pp |
| The current encryption method for a file in a zip archive can be |
| determined using |
| .Xr zip_stat 3 . |
| .Sh RETURN VALUES |
| Upon successful completion 0 is returned. |
| Otherwise, \-1 is returned and the error information in |
| .Ar archive |
| is set to indicate the error. |
| .Sh ERRORS |
| .Fn zip_file_set_encryption |
| fails if: |
| .Bl -tag -width Er |
| .It Bq Er ZIP_ER_ENCRNOTSUPP |
| Unsupported compression method requested. |
| .It Bq Er ZIP_ER_INVAL |
| .Ar index |
| is not a valid file index in |
| .Ar archive , |
| or the argument combination is invalid. |
| .It Bq Er ZIP_ER_MEMORY |
| Required memory could not be allocated. |
| .It Bq Er ZIP_ER_RDONLY |
| Read-only zip file, no changes allowed. |
| .El |
| .Sh SEE ALSO |
| .Xr libzip 3 , |
| .Xr zip_set_default_password 3 , |
| .Xr zip_stat 3 |
| .Sh HISTORY |
| .Fn zip_file_set_encryption |
| was added in libzip 1.2.0. |
| .Sh AUTHORS |
| .An -nosplit |
| .An Dieter Baron Aq Mt dillo@nih.at |
| and |
| .An Thomas Klausner Aq Mt tk@giga.or.at |
