.\" Copyright (c) 2004 - 2006 Kungliga Tekniska Högskolan
.\" (Royal Institute of Technology, Stockholm, Sweden).
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\"
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" 3. Neither the name of the Institute nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $Id$
.\"
.Dd July 10, 2006
.Dt KRB5_STRING_TO_KEY 3
.Os HEIMDAL
.Sh NAME
.Nm krb5_string_to_key ,
.Nm krb5_string_to_key_data ,
.Nm krb5_string_to_key_data_salt ,
.Nm krb5_string_to_key_data_salt_opaque ,
.Nm krb5_string_to_key_salt ,
.Nm krb5_string_to_key_salt_opaque ,
.Nm krb5_get_pw_salt ,
.Nm krb5_free_salt
.Nd turns a string to a Kerberos key
.Sh LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5)
.Sh SYNOPSIS
.In krb5.h
.Ft krb5_error_code
.Fo krb5_string_to_key
.Fa "krb5_context context"
.Fa "krb5_enctype enctype"
.Fa "const char *password"
.Fa "krb5_principal principal"
.Fa "krb5_keyblock *key"
.Fc
.Ft krb5_error_code
.Fo krb5_string_to_key_data
.Fa "krb5_context context"
.Fa "krb5_enctype enctype"
.Fa "krb5_data password"
.Fa "krb5_principal principal"
.Fa "krb5_keyblock *key"
.Fc
.Ft krb5_error_code
.Fo krb5_string_to_key_data_salt
.Fa "krb5_context context"
.Fa "krb5_enctype enctype"
.Fa "krb5_data password"
.Fa "krb5_salt salt"
.Fa "krb5_keyblock *key"
.Fc
.Ft krb5_error_code
.Fo krb5_string_to_key_data_salt_opaque
.Fa "krb5_context context"
.Fa "krb5_enctype enctype"
.Fa "krb5_data password"
.Fa "krb5_salt salt"
.Fa "krb5_data opaque"
.Fa "krb5_keyblock *key"
.Fc
.Ft krb5_error_code
.Fo krb5_string_to_key_salt
.Fa "krb5_context context"
.Fa "krb5_enctype enctype"
.Fa "const char *password"
.Fa "krb5_salt salt"
.Fa "krb5_keyblock *key"
.Fc
.Ft krb5_error_code
.Fo krb5_string_to_key_salt_opaque
.Fa "krb5_context context"
.Fa "krb5_enctype enctype"
.Fa "const char *password"
.Fa "krb5_salt salt"
.Fa "krb5_data opaque"
.Fa "krb5_keyblock *key"
.Fc
.Ft krb5_error_code
.Fo krb5_get_pw_salt
.Fa "krb5_context context"
.Fa "krb5_const_principal principal"
.Fa "krb5_salt *salt"
.Fc
.Ft krb5_error_code
.Fo krb5_free_salt
.Fa "krb5_context context"
.Fa "krb5_salt salt"
.Fc
.Sh DESCRIPTION
The string to key functions convert a string to a kerberos key.
.Pp
.Fn krb5_string_to_key_data_salt_opaque
is the function that does all the work, the rest of the functions are
just wrappers around
.Fn krb5_string_to_key_data_salt_opaque
that calls it with default values.
.Pp
.Fn krb5_string_to_key_data_salt_opaque
transforms the
.Fa password
with the given salt-string
.Fa salt
and the opaque, encryption type specific parameter
.Fa opaque
to a encryption key
.Fa key
according to the string to key function associated with
.Fa enctype .
.Pp
The
.Fa key
should be freed with
.Fn krb5_free_keyblock_contents .
.Pp
If one of the functions that doesn't take a
.Li krb5_salt
as it argument
.Fn krb5_get_pw_salt
is used to get the salt value.
.Pp
.Fn krb5_get_pw_salt
get the default password salt for a principal, use
.Fn krb5_free_salt
to free the salt when done.
.Pp
.Fn krb5_free_salt
frees the content of
.Fa salt .
.Sh SEE ALSO
.Xr krb5 3 ,
.Xr krb5_data 3 ,
.Xr krb5_keyblock 3 ,
.Xr kerberos 8