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.Dd July 15, 2004
.Dt KRB5_SET_PASSWORD 3
.Os
.Sh NAME
.Nm krb5_change_password ,
.Nm krb5_set_password ,
.Nm krb5_set_password_using_ccache ,
.Nm krb5_passwd_result_to_string
.Nd change password functions
.Sh LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5)
.Sh SYNOPSIS
.In krb5/krb5.h
.Ft krb5_error_code
.Fo krb5_change_password
.Fa "krb5_context context"
.Fa "krb5_creds *creds"
.Fa "char *newpw"
.Fa "int *result_code"
.Fa "krb5_data *result_code_string"
.Fa "krb5_data *result_string"
.Fc
.Ft krb5_error_code
.Fo krb5_set_password
.Fa "krb5_context context"
.Fa "krb5_creds *creds"
.Fa "char *newpw"
.Fa "krb5_principal targprinc"
.Fa "int *result_code"
.Fa "krb5_data *result_code_string"
.Fa "krb5_data *result_string"
.Fc
.Ft krb5_error_code
.Fo krb5_set_password_using_ccache
.Fa "krb5_context context"
.Fa "krb5_ccache ccache"
.Fa "char *newpw"
.Fa "krb5_principal targprinc"
.Fa "int *result_code"
.Fa "krb5_data *result_code_string"
.Fa "krb5_data *result_string"
.Fc
.Ft "const char *"
.Fo krb5_passwd_result_to_string
.Fa "krb5_context context"
.Fa "int result"
.Fc
.Sh DESCRIPTION
These functions change the password for a given principal.
.Pp
.Fn krb5_set_password
and
.Fn krb5_set_password_using_ccache
are the newer of the three functions, and use a newer version of the
protocol (and also fall back to the older set-password protocol if the
newer protocol doesn't work).
.Pp
.Fn krb5_change_password
sets the password
.Fa newpasswd
for the client principal in
.Fa creds .
The server principal of creds must be
.Li kadmin/changepw .
.Pp
.Fn krb5_set_password
and
.Fn krb5_set_password_using_ccache
change the password for the principal
.Fa targprinc .
.Pp
.Fn krb5_set_password
requires that the credential for
.Li kadmin/changepw@REALM
is in
.Fa creds .
If the user caller isn't an administrator, this credential
needs to be an initial credential, see
.Xr krb5_get_init_creds 3
how to get such credentials.
.Pp
.Fn krb5_set_password_using_ccache
will get the credential from
.Fa ccache .
.Pp
If
.Fa targprinc
is
.Dv NULL ,
.Fn krb5_set_password_using_ccache
uses the the default principal in
.Fa ccache
and
.Fn krb5_set_password
uses the global the default principal.
.Pp
All three functions return an error in
.Fa result_code
and maybe an error string to print in
.Fa result_string .
.Pp
.Fn krb5_passwd_result_to_string
returns an human readable string describing the error code in
.Fa result_code
from the
.Fn krb5_set_password
functions.
.Sh SEE ALSO
.Xr krb5_ccache 3 ,
.Xr krb5_init_context 3