heimdal/lib/krb5/krb5_get_init_creds.3

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.Dd March 21, 2004
.Dt KRB5_GET_INIT_CREDS 3
.Os HEIMDAL
.Sh NAME
.Nm krb5_get_init_creds ,
.Nm krb5_get_init_creds_keytab ,
.Nm krb5_get_init_creds_opt ,
.Nm krb5_get_init_creds_opt_alloc ,
.Nm krb5_get_init_creds_opt_free ,
.Nm krb5_get_init_creds_opt_free_pkinit ,
.Nm krb5_get_init_creds_opt_init ,
.Nm krb5_get_init_creds_opt_set_address_list ,
.Nm krb5_get_init_creds_opt_set_anonymous ,
.Nm krb5_get_init_creds_opt_set_default_flags ,
.Nm krb5_get_init_creds_opt_set_etype_list ,
.Nm krb5_get_init_creds_opt_set_forwardable ,
.Nm krb5_get_init_creds_opt_set_pa_password ,
.Nm krb5_get_init_creds_opt_set_paq_request ,
.Nm krb5_get_init_creds_opt_set_preauth_list ,
.Nm krb5_get_init_creds_opt_set_proxiable ,
.Nm krb5_get_init_creds_opt_set_rewew_life ,
.Nm krb5_get_init_creds_opt_set_salt ,
.Nm krb5_get_init_creds_opt_set_tkt_life ,
.Nm krb5_get_init_creds_password ,
.Nm krb5_prompt ,
.Nm krb5_prompter_posix
.Nd kerberos 5 initial authentication functions.
.Sh LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5)
.Sh SYNOPSIS
.In krb5.h
.Pp
.Ft krb5_get_init_creds_opt;
.Pp
.Ft krb5_error_code
.Fo krb5_get_init_creds_opt_alloc
.Fa "krb5_context context"
.Fa "krb5_get_init_creds_opt **opt"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_free
.Fa "krb5_get_init_creds_opt *opt"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_free_pkinit
.Fa "krb5_get_init_creds_opt *opt"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_init
.Fa "krb5_get_init_creds_opt *opt"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_address_list
.Fa "krb5_get_init_creds_opt *opt"
.Fa "krb5_addresses *addresses"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_anonymous
.Fa "krb5_get_init_creds_opt *opt"
.Fa "int anonymous"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_default_flags
.Fa "krb5_context context"
.Fa "const char *appname"
.Fa "krb5_const_realm realm"
.Fa "krb5_get_init_creds_opt *opt"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_etype_list
.Fa "krb5_get_init_creds_opt *opt"
.Fa "krb5_enctype *etype_list"
.Fa int etype_list_length"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_forwardable
.Fa "krb5_get_init_creds_opt *opt"
.Fa "int forwardable"
.Fc
.Ft krb5_error_code
.Fo krb5_get_init_creds_opt_set_pa_password
.Fa "krb5_context context"
.Fa "krb5_get_init_creds_opt *opt"
.Fa "const char *password"
.Fa "krb5_s2k_proc key_proc"
.Fc
.Ft krb5_error_code
.Fo krb5_get_init_creds_opt_set_paq_request
.Fa "krb5_context context"
.Fa "krb5_get_init_creds_opt *opt"
.Fa "krb5_boolean req_pac"
.Fc
.Ft krb5_error_code
.Fo krb5_get_init_creds_opt_set_pkinit
.Fa "krb5_context context"
.Fa "krb5_get_init_creds_opt *opt"
.Fa "const char *cert_file"
.Fa "const char *key_file"
.Fa "const char *x509_anchors"
.Fa "int flags"
.Fa "char *password"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_preauth_list
.Fa "krb5_get_init_creds_opt *opt"
.Fa "krb5_preauthtype *preauth_list"
.Fa "int preauth_list_length"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_proxiable
.Fa "krb5_get_init_creds_opt *opt"
.Fa "int proxiable"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_rewew_life
.Fa "krb5_get_init_creds_opt *opt"
.Fa "krb5_deltat renew_life"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_salt
.Fa "krb5_get_init_creds_opt *opt"
.Fa "krb5_data *salt"
.Fc
.Ft void
.Fo krb5_get_init_creds_opt_set_tkt_life
.Fa "krb5_get_init_creds_opt *opt"
.Fa "krb5_deltat tkt_life"
.Fc
.Ft krb5_error_code
.Fo krb5_get_init_creds
.Fa "krb5_context context"
.Fa "krb5_creds *creds"
.Fa "krb5_principal client"
.Fa "krb5_prompter_fct prompter"
.Fa "void *data"
.Fa "krb5_deltat start_time"
.Fa "const char *in_tkt_service"
.Fa "krb5_get_init_creds_opt *options"
.Fc
.Ft krb5_error_code
.Fo krb5_get_init_creds_password
.Fa "krb5_context context"
.Fa "krb5_creds *creds"
.Fa "krb5_principal client"
.Fa "const char *password"
.Fa "krb5_prompter_fct prompter"
.Fa "void *data"
.Fa "krb5_deltat start_time"
.Fa "const char *in_tkt_service"
.Fa "krb5_get_init_creds_opt *in_options"
.Fc
.Ft krb5_error_code
.Fo krb5_get_init_creds_keytab
.Fa "krb5_context context"
.Fa "krb5_creds *creds"
.Fa "krb5_principal client"
.Fa "krb5_keytab keytab"
.Fa "krb5_deltat start_time"
.Fa "const char *in_tkt_service"
.Fa "krb5_get_init_creds_opt *options"
.Fc
.Ft int
.Fo krb5_prompter_posix
.Fa "krb5_context context"
.Fa "void *data"
.Fa "const char *name"
.Fa "const char *banner"
.Fa "int num_prompts"
.Fa "krb5_prompt prompts[]"
.Fc
.Sh DESCRIPTION
Getting initial credential ticket for a principal.
This interface that replaces the deprecated
.Fa krb5_in_tkt
and 
.Fa krb5_in_cred
functions.
.Pp
If you only to verify a user and password, consider using
.Xr krb5_verify_user 3
instead, since it also verifies that initial credentials with using a
keytab to make sure the response was from the KDC.
.Pp
First a
.Li krb5_get_init_creds_opt
structure is initialized. The structure modified by the any of the
.Fn krb5_get_init_creds_opt_set
functions to change request parameters and authentication information.
.Pp
The the actual reqest to the KDC is done by any of the
.Fn krb5_get_init_creds ,
.Fn krb5_get_init_creds_password ,
or
.Fn krb5_get_init_creds_keytab
functions.
.Fn krb5_get_init_creds
is the least specialized function and can, with the right in data,
behave like the later two.
The later two are there for compatibly with older releases and that
they are slightly easier to use.
.Pp
.Li krb5_prompt
is a structure containing the following elements:
.Bd -literal
typedef struct {
    const char *prompt;
    int hidden;
    krb5_data *reply;
    krb5_prompt_type type
} krb5_prompt;
.Ed
.Pp
.Fa prompt
is the prompt that should shown to the user
If
.Fa hidden
is set, the prompter function shouldn't echo the output to the display
device.
.Fa reply
must be preallocated, it will not be allocated in by the prompter
function.
Possible value for the
.Fa type
element are:
.Bl -tag -compact -offset indent
.It KRB5_PROMPT_TYPE_PASSWORD
.It KRB5_PROMPT_TYPE_NEW_PASSWORD
.It KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN
.It KRB5_PROMPT_TYPE_PREAUTH
.El
.Pp
.Fn krb5_prompter_posix
is a the default prompter function in a posix environment.
It matches the
.Fa krb5_prompter_fct
and can be used in the
.Fa krb5_get_init_creds
functions.
.Sh SEE ALSO
.Xr krb5 3 ,
.Xr krb5_creds 3 ,
.Xr krb5_verify_user 3 ,
.Xr krb5.conf 5 ,
.Xr kerberos 8