.\" Copyright (c) 2014 Michihiro NAKAJIMA
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.\" $FreeBSD$
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.Dd September 14, 2014
.Dt ARCHIVE_READ_ADD_PASSPHRASE 3
.Os
.Sh NAME
.Nm archive_read_add_passphrase ,
.Nm archive_read_set_passphrase_callback
.Nd functions for reading encrypted archives
.Sh LIBRARY
Streaming Archive Library (libarchive, -larchive)
.Sh SYNOPSIS
.In archive.h
.Ft int
.Fo archive_read_add_passphrase
.Fa "struct archive *"
.Fa "const char *passphrase"
.Fc
.Ft int
.Fo archive_read_set_passphrase_callback
.Fa "struct archive *"
.Fa "void *client_data"
.Fa "archive_passphrase_callback *"
.Fc
.Sh DESCRIPTION
.Bl -tag -width indent
.It Fn archive_read_add_passphrase
Register passphrases for reading an encryption archive.
If
.Ar passphrase
is
.Dv NULL
or empty, this function will do nothing and
.Cm ARCHIVE_FAILED
will be returned.
Otherwise,
.Cm ARCHIVE_OK
will be returned. 
.It Fn archive_read_set_passphrase_callback
Register callback function that will be invoked to get a passphrase 
for decrption after trying all passphrases registered by the
.Fn archive_read_add_passphrase
function failed.
.El
.\" .Sh ERRORS
.Sh SEE ALSO
.Xr tar 1 ,
.Xr libarchive 3 ,
.Xr archive_read 3 ,
.Xr archive_read_set_options 3