1.\" Copyright (c) 2003 - 2007 Kungliga Tekniska Högskolan 2.\" (Royal Institute of Technology, Stockholm, Sweden). 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" 3. Neither the name of the Institute nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" $Id$ 33.\" 34.Dd Sep 16, 2006 35.Dt KRB5_GET_INIT_CREDS 3 36.Os HEIMDAL 37.Sh NAME 38.Nm krb5_get_init_creds , 39.Nm krb5_get_init_creds_keytab , 40.Nm krb5_get_init_creds_opt , 41.Nm krb5_get_init_creds_opt_alloc , 42.Nm krb5_get_init_creds_opt_free , 43.Nm krb5_get_init_creds_opt_init , 44.Nm krb5_get_init_creds_opt_set_address_list , 45.Nm krb5_get_init_creds_opt_set_addressless , 46.Nm krb5_get_init_creds_opt_set_anonymous , 47.Nm krb5_get_init_creds_opt_set_default_flags , 48.Nm krb5_get_init_creds_opt_set_etype_list , 49.Nm krb5_get_init_creds_opt_set_forwardable , 50.Nm krb5_get_init_creds_opt_set_pa_password , 51.Nm krb5_get_init_creds_opt_set_paq_request , 52.Nm krb5_get_init_creds_opt_set_preauth_list , 53.Nm krb5_get_init_creds_opt_set_proxiable , 54.Nm krb5_get_init_creds_opt_set_renew_life , 55.Nm krb5_get_init_creds_opt_set_salt , 56.Nm krb5_get_init_creds_opt_set_tkt_life , 57.Nm krb5_get_init_creds_opt_set_canonicalize , 58.Nm krb5_get_init_creds_opt_set_win2k , 59.Nm krb5_get_init_creds_password , 60.Nm krb5_prompt , 61.Nm krb5_prompter_posix 62.Nd Kerberos 5 initial authentication functions 63.Sh LIBRARY 64Kerberos 5 Library (libkrb5, -lkrb5) 65.Sh SYNOPSIS 66.In krb5.h 67.Pp 68.Ft krb5_get_init_creds_opt; 69.Pp 70.Ft krb5_error_code 71.Fo krb5_get_init_creds_opt_alloc 72.Fa "krb5_context context" 73.Fa "krb5_get_init_creds_opt **opt" 74.Fc 75.Ft void 76.Fo krb5_get_init_creds_opt_free 77.Fa "krb5_context context" 78.Fa "krb5_get_init_creds_opt *opt" 79.Fc 80.Ft void 81.Fo krb5_get_init_creds_opt_init 82.Fa "krb5_get_init_creds_opt *opt" 83.Fc 84.Ft void 85.Fo krb5_get_init_creds_opt_set_address_list 86.Fa "krb5_get_init_creds_opt *opt" 87.Fa "krb5_addresses *addresses" 88.Fc 89.Ft void 90.Fo krb5_get_init_creds_opt_set_addressless 91.Fa "krb5_get_init_creds_opt *opt" 92.Fa "krb5_boolean addressless" 93.Fc 94.Ft void 95.Fo krb5_get_init_creds_opt_set_anonymous 96.Fa "krb5_get_init_creds_opt *opt" 97.Fa "int anonymous" 98.Fc 99.Ft void 100.Fo krb5_get_init_creds_opt_set_default_flags 101.Fa "krb5_context context" 102.Fa "const char *appname" 103.Fa "krb5_const_realm realm" 104.Fa "krb5_get_init_creds_opt *opt" 105.Fc 106.Ft void 107.Fo krb5_get_init_creds_opt_set_etype_list 108.Fa "krb5_get_init_creds_opt *opt" 109.Fa "krb5_enctype *etype_list" 110.Fa "int etype_list_length" 111.Fc 112.Ft void 113.Fo krb5_get_init_creds_opt_set_forwardable 114.Fa "krb5_get_init_creds_opt *opt" 115.Fa "int forwardable" 116.Fc 117.Ft krb5_error_code 118.Fo krb5_get_init_creds_opt_set_pa_password 119.Fa "krb5_context context" 120.Fa "krb5_get_init_creds_opt *opt" 121.Fa "const char *password" 122.Fa "krb5_s2k_proc key_proc" 123.Fc 124.Ft krb5_error_code 125.Fo krb5_get_init_creds_opt_set_paq_request 126.Fa "krb5_context context" 127.Fa "krb5_get_init_creds_opt *opt" 128.Fa "krb5_boolean req_pac" 129.Fc 130.Ft krb5_error_code 131.Fo krb5_get_init_creds_opt_set_pkinit 132.Fa "krb5_context context" 133.Fa "krb5_get_init_creds_opt *opt" 134.Fa "const char *cert_file" 135.Fa "const char *key_file" 136.Fa "const char *x509_anchors" 137.Fa "int flags" 138.Fa "char *password" 139.Fc 140.Ft void 141.Fo krb5_get_init_creds_opt_set_preauth_list 142.Fa "krb5_get_init_creds_opt *opt" 143.Fa "krb5_preauthtype *preauth_list" 144.Fa "int preauth_list_length" 145.Fc 146.Ft void 147.Fo krb5_get_init_creds_opt_set_proxiable 148.Fa "krb5_get_init_creds_opt *opt" 149.Fa "int proxiable" 150.Fc 151.Ft void 152.Fo krb5_get_init_creds_opt_set_renew_life 153.Fa "krb5_get_init_creds_opt *opt" 154.Fa "krb5_deltat renew_life" 155.Fc 156.Ft void 157.Fo krb5_get_init_creds_opt_set_salt 158.Fa "krb5_get_init_creds_opt *opt" 159.Fa "krb5_data *salt" 160.Fc 161.Ft void 162.Fo krb5_get_init_creds_opt_set_tkt_life 163.Fa "krb5_get_init_creds_opt *opt" 164.Fa "krb5_deltat tkt_life" 165.Fc 166.Ft krb5_error_code 167.Fo krb5_get_init_creds_opt_set_canonicalize 168.Fa "krb5_context context" 169.Fa "krb5_get_init_creds_opt *opt" 170.Fa "krb5_boolean req" 171.Fc 172.Ft krb5_error_code 173.Fo krb5_get_init_creds_opt_set_win2k 174.Fa "krb5_context context" 175.Fa "krb5_get_init_creds_opt *opt" 176.Fa "krb5_boolean req" 177.Fc 178.Ft krb5_error_code 179.Fo krb5_get_init_creds 180.Fa "krb5_context context" 181.Fa "krb5_creds *creds" 182.Fa "krb5_principal client" 183.Fa "krb5_prompter_fct prompter" 184.Fa "void *prompter_data" 185.Fa "krb5_deltat start_time" 186.Fa "const char *in_tkt_service" 187.Fa "krb5_get_init_creds_opt *options" 188.Fc 189.Ft krb5_error_code 190.Fo krb5_get_init_creds_password 191.Fa "krb5_context context" 192.Fa "krb5_creds *creds" 193.Fa "krb5_principal client" 194.Fa "const char *password" 195.Fa "krb5_prompter_fct prompter" 196.Fa "void *prompter_data" 197.Fa "krb5_deltat start_time" 198.Fa "const char *in_tkt_service" 199.Fa "krb5_get_init_creds_opt *in_options" 200.Fc 201.Ft krb5_error_code 202.Fo krb5_get_init_creds_keytab 203.Fa "krb5_context context" 204.Fa "krb5_creds *creds" 205.Fa "krb5_principal client" 206.Fa "krb5_keytab keytab" 207.Fa "krb5_deltat start_time" 208.Fa "const char *in_tkt_service" 209.Fa "krb5_get_init_creds_opt *options" 210.Fc 211.Ft int 212.Fo krb5_prompter_posix 213.Fa "krb5_context context" 214.Fa "void *data" 215.Fa "const char *name" 216.Fa "const char *banner" 217.Fa "int num_prompts" 218.Fa "krb5_prompt prompts[]" 219.Fc 220.Sh DESCRIPTION 221Getting initial credential ticket for a principal. 222That may include changing an expired password, and doing preauthentication. 223This interface that replaces the deprecated 224.Fa krb5_in_tkt 225and 226.Fa krb5_in_cred 227functions. 228.Pp 229If you only want to verify a username and password, consider using 230.Xr krb5_verify_user 3 231instead, since it also verifies that initial credentials with using a 232keytab to make sure the response was from the KDC. 233.Pp 234First a 235.Li krb5_get_init_creds_opt 236structure is initialized 237with 238.Fn krb5_get_init_creds_opt_alloc 239or 240.Fn krb5_get_init_creds_opt_init . 241.Fn krb5_get_init_creds_opt_alloc 242allocates a extendible structures that needs to be freed with 243.Fn krb5_get_init_creds_opt_free . 244The structure may be modified by any of the 245.Fn krb5_get_init_creds_opt_set 246functions to change request parameters and authentication information. 247.Pp 248If the caller want to use the default options, 249.Dv NULL 250can be passed instead. 251.Pp 252The the actual request to the KDC is done by any of the 253.Fn krb5_get_init_creds , 254.Fn krb5_get_init_creds_password , 255or 256.Fn krb5_get_init_creds_keytab 257functions. 258.Fn krb5_get_init_creds 259is the least specialized function and can, with the right in data, 260behave like the latter two. 261The latter two are there for compatibility with older releases and 262they are slightly easier to use. 263.Pp 264.Li krb5_prompt 265is a structure containing the following elements: 266.Bd -literal 267typedef struct { 268 const char *prompt; 269 int hidden; 270 krb5_data *reply; 271 krb5_prompt_type type 272} krb5_prompt; 273.Ed 274.Pp 275.Fa prompt 276is the prompt that should shown to the user 277If 278.Fa hidden 279is set, the prompter function shouldn't echo the output to the display 280device. 281.Fa reply 282must be preallocated; it will not be allocated by the prompter 283function. 284Possible values for the 285.Fa type 286element are: 287.Pp 288.Bl -tag -width Ds -compact -offset indent 289.It KRB5_PROMPT_TYPE_PASSWORD 290.It KRB5_PROMPT_TYPE_NEW_PASSWORD 291.It KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN 292.It KRB5_PROMPT_TYPE_PREAUTH 293.It KRB5_PROMPT_TYPE_INFO 294.El 295.Pp 296.Fn krb5_prompter_posix 297is the default prompter function in a POSIX environment. 298It matches the 299.Fa krb5_prompter_fct 300and can be used in the 301.Fa krb5_get_init_creds 302functions. 303.Fn krb5_prompter_posix 304doesn't require 305.Fa prompter_data. 306.Pp 307If the 308.Fa start_time 309is zero, then the requested ticket will be valid 310beginning immediately. 311Otherwise, the 312.Fa start_time 313indicates how far in the future the ticket should be postdated. 314.Pp 315If the 316.Fa in_tkt_service 317name is 318.Dv non-NULL , 319that principal name will be 320used as the server name for the initial ticket request. 321The realm of the name specified will be ignored and will be set to the 322realm of the client name. 323If no in_tkt_service name is specified, 324krbtgt/CLIENT-REALM@CLIENT-REALM will be used. 325.Pp 326For the rest of arguments, a configuration or library default will be 327used if no value is specified in the options structure. 328.Pp 329.Fn krb5_get_init_creds_opt_set_address_list 330sets the list of 331.Fa addresses 332that is should be stored in the ticket. 333.Pp 334.Fn krb5_get_init_creds_opt_set_addressless 335controls if the ticket is requested with addresses or not, 336.Fn krb5_get_init_creds_opt_set_address_list 337overrides this option. 338.Pp 339.Fn krb5_get_init_creds_opt_set_anonymous 340make the request anonymous if the 341.Fa anonymous 342parameter is non-zero. 343.Pp 344.Fn krb5_get_init_creds_opt_set_default_flags 345sets the default flags using the configuration file. 346.Pp 347.Fn krb5_get_init_creds_opt_set_etype_list 348set a list of enctypes that the client is willing to support in the 349request. 350.Pp 351.Fn krb5_get_init_creds_opt_set_forwardable 352request a forwardable ticket. 353.Pp 354.Fn krb5_get_init_creds_opt_set_pa_password 355set the 356.Fa password 357and 358.Fa key_proc 359that is going to be used to get a new ticket. 360.Fa password 361or 362.Fa key_proc 363can be 364.Dv NULL 365if the caller wants to use the default values. 366If the 367.Fa password 368is unset and needed, the user will be prompted for it. 369.Pp 370.Fn krb5_get_init_creds_opt_set_paq_request 371sets the password that is going to be used to get a new ticket. 372.Pp 373.Fn krb5_get_init_creds_opt_set_preauth_list 374sets the list of client-supported preauth types. 375.Pp 376.Fn krb5_get_init_creds_opt_set_proxiable 377makes the request proxiable. 378.Pp 379.Fn krb5_get_init_creds_opt_set_renew_life 380sets the requested renewable lifetime. 381.Pp 382.Fn krb5_get_init_creds_opt_set_salt 383sets the salt that is going to be used in the request. 384.Pp 385.Fn krb5_get_init_creds_opt_set_tkt_life 386sets requested ticket lifetime. 387.Pp 388.Fn krb5_get_init_creds_opt_set_canonicalize 389requests that the KDC canonicalize the client pricipal if possible. 390.Pp 391.Fn krb5_get_init_creds_opt_set_win2k 392turns on compatibility with Windows 2000. 393.Sh SEE ALSO 394.Xr krb5 3 , 395.Xr krb5_creds 3 , 396.Xr krb5_verify_user 3 , 397.Xr krb5.conf 5 , 398.Xr kerberos 8 399