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.\" $Id: krb5_string_to_key.3 17820 2006-07-10 14:28:01Z lha $
.\"
.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 wrapers 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