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krb5_get_init_creds, krb5_get_init_creds_keytab, krb5_get_init_creds_opt, krb5_get_init_creds_opt_alloc, krb5_get_init_creds_opt_free, krb5_get_init_creds_opt_init, krb5_get_init_creds_opt_set_address_list, krb5_get_init_creds_opt_set_addressless, krb5_get_init_creds_opt_set_anonymous, krb5_get_init_creds_opt_set_default_flags, krb5_get_init_creds_opt_set_etype_list, krb5_get_init_creds_opt_set_forwardable, krb5_get_init_creds_opt_set_pa_password, krb5_get_init_creds_opt_set_paq_request, krb5_get_init_creds_opt_set_preauth_list, krb5_get_init_creds_opt_set_proxiable, krb5_get_init_creds_opt_set_renew_life, krb5_get_init_creds_opt_set_salt, krb5_get_init_creds_opt_set_tkt_life, krb5_get_init_creds_opt_set_canonicalize, krb5_get_init_creds_opt_set_win2k, krb5_get_init_creds_password, krb5_prompt, krb5_prompter_posix - Kerberos 5 initial authentication functions


See Also


Kerberos 5 Library (libkrb5, -lkrb5)


.In krb5.h


.Fo krb5_get_init_creds_opt_alloc krb5_context context krb5_get_init_creds_opt **opt
.Fc void
.Fo krb5_get_init_creds_opt_free krb5_context context krb5_get_init_creds_opt *opt
.Fc void
.Fo krb5_get_init_creds_opt_init krb5_get_init_creds_opt *opt
.Fc void
.Fo krb5_get_init_creds_opt_set_address_list krb5_get_init_creds_opt *opt krb5_addresses *addresses
.Fc void
.Fo krb5_get_init_creds_opt_set_addressless krb5_get_init_creds_opt *opt krb5_boolean addressless
.Fc void
.Fo krb5_get_init_creds_opt_set_anonymous krb5_get_init_creds_opt *opt int anonymous
.Fc void
.Fo krb5_get_init_creds_opt_set_default_flags krb5_context context const char *appname krb5_const_realm realm krb5_get_init_creds_opt *opt
.Fc void
.Fo krb5_get_init_creds_opt_set_etype_list krb5_get_init_creds_opt *opt krb5_enctype *etype_list int etype_list_length
.Fc void
.Fo krb5_get_init_creds_opt_set_forwardable krb5_get_init_creds_opt *opt int forwardable
.Fc krb5_error_code
.Fo krb5_get_init_creds_opt_set_pa_password krb5_context context krb5_get_init_creds_opt *opt const char *password krb5_s2k_proc key_proc
.Fc krb5_error_code
.Fo krb5_get_init_creds_opt_set_paq_request krb5_context context krb5_get_init_creds_opt *opt krb5_boolean req_pac
.Fc krb5_error_code
.Fo krb5_get_init_creds_opt_set_pkinit krb5_context context krb5_get_init_creds_opt *opt const char *cert_file const char *key_file const char *x509_anchors int flags char *password
.Fc void
.Fo krb5_get_init_creds_opt_set_preauth_list krb5_get_init_creds_opt *opt krb5_preauthtype *preauth_list int preauth_list_length
.Fc void
.Fo krb5_get_init_creds_opt_set_proxiable krb5_get_init_creds_opt *opt int proxiable
.Fc void
.Fo krb5_get_init_creds_opt_set_renew_life krb5_get_init_creds_opt *opt krb5_deltat renew_life
.Fc void
.Fo krb5_get_init_creds_opt_set_salt krb5_get_init_creds_opt *opt krb5_data *salt
.Fc void
.Fo krb5_get_init_creds_opt_set_tkt_life krb5_get_init_creds_opt *opt krb5_deltat tkt_life
.Fc krb5_error_code
.Fo krb5_get_init_creds_opt_set_canonicalize krb5_context context krb5_get_init_creds_opt *opt krb5_boolean req
.Fc krb5_error_code
.Fo krb5_get_init_creds_opt_set_win2k krb5_context context krb5_get_init_creds_opt *opt krb5_boolean req
.Fc krb5_error_code
.Fo krb5_get_init_creds krb5_context context krb5_creds *creds krb5_principal client krb5_prompter_fct prompter void *prompter_data krb5_deltat start_time const char *in_tkt_service krb5_get_init_creds_opt *options
.Fc krb5_error_code
.Fo krb5_get_init_creds_password krb5_context context krb5_creds *creds krb5_principal client const char *password krb5_prompter_fct prompter void *prompter_data krb5_deltat start_time const char *in_tkt_service krb5_get_init_creds_opt *in_options
.Fc krb5_error_code
.Fo krb5_get_init_creds_keytab krb5_context context krb5_creds *creds krb5_principal client krb5_keytab keytab krb5_deltat start_time const char *in_tkt_service krb5_get_init_creds_opt *options
.Fc int
.Fo krb5_prompter_posix krb5_context context void *data const char *name const char *banner int num_prompts krb5_prompt prompts[]


Getting initial credential ticket for a principal. That may include changing an expired password, and doing preauthentication. This interface that replaces the deprecated krb5_in_tkt and krb5_in_cred functions.

If you only want to verify a username and password, consider using 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.

First a krb5_get_init_creds_opt structure is initialized with krb5_get_init_creds_opt_alloc or krb5_get_init_creds_opt_init. krb5_get_init_creds_opt_alloc allocates a extendible structures that needs to be freed with krb5_get_init_creds_opt_free. The structure may be modified by any of the krb5_get_init_creds_opt_set functions to change request parameters and authentication information.

If the caller want to use the default options, NULL can be passed instead.

The the actual request to the KDC is done by any of the krb5_get_init_creds, krb5_get_init_creds_password, or krb5_get_init_creds_keytab functions. krb5_get_init_creds is the least specialized function and can, with the right in data, behave like the latter two. The latter two are there for compatibility with older releases and they are slightly easier to use.

krb5_prompt is a structure containing the following elements:

typedef struct {
    const char *prompt;
    int hidden;
    krb5_data *reply;
    krb5_prompt_type type
} krb5_prompt;

prompt is the prompt that should shown to the user If hidden is set, the prompter function shouldn’t echo the output to the display device. reply must be preallocated; it will not be allocated by the prompter function. Possible values for the type element are:


krb5_prompter_posix is the default prompter function in a POSIX environment. It matches the krb5_prompter_fct and can be used in the krb5_get_init_creds functions. krb5_prompter_posix doesn’t require prompter_data.

If the start_time is zero, then the requested ticket will be valid beginning immediately. Otherwise, the start_time indicates how far in the future the ticket should be postdated.

If the in_tkt_service name is non-NULL, that principal name will be used as the server name for the initial ticket request. The realm of the name specified will be ignored and will be set to the realm of the client name. If no in_tkt_service name is specified, krbtgt/CLIENT-REALM@CLIENT-REALM will be used.

For the rest of arguments, a configuration or library default will be used if no value is specified in the options structure.

krb5_get_init_creds_opt_set_address_list sets the list of addresses that is should be stored in the ticket.

krb5_get_init_creds_opt_set_addressless controls if the ticket is requested with addresses or not, krb5_get_init_creds_opt_set_address_list overrides this option.

krb5_get_init_creds_opt_set_anonymous make the request anonymous if the anonymous parameter is non-zero.

krb5_get_init_creds_opt_set_default_flags sets the default flags using the configuration file.

krb5_get_init_creds_opt_set_etype_list set a list of enctypes that the client is willing to support in the request.

krb5_get_init_creds_opt_set_forwardable request a forwardable ticket.

krb5_get_init_creds_opt_set_pa_password set the password and key_proc that is going to be used to get a new ticket. password or key_proc can be NULL if the caller wants to use the default values. If the password is unset and needed, the user will be prompted for it.

krb5_get_init_creds_opt_set_paq_request sets the password that is going to be used to get a new ticket.

krb5_get_init_creds_opt_set_preauth_list sets the list of client-supported preauth types.

krb5_get_init_creds_opt_set_proxiable makes the request proxiable.

krb5_get_init_creds_opt_set_renew_life sets the requested renewable lifetime.

krb5_get_init_creds_opt_set_salt sets the salt that is going to be used in the request.

krb5_get_init_creds_opt_set_tkt_life sets requested ticket lifetime.

krb5_get_init_creds_opt_set_canonicalize requests that the KDC canonicalize the client pricipal if possible.

krb5_get_init_creds_opt_set_win2k turns on compatibility with Windows 2000.


krb5(3), krb5_creds(3), krb5_verify_user(3), krb5.conf(5), kerberos(8)
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