diff options
Diffstat (limited to 'source4/libads/kerberos.c')
| -rw-r--r-- | source4/libads/kerberos.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/source4/libads/kerberos.c b/source4/libads/kerberos.c new file mode 100644 index 00000000000..bef2febaefd --- /dev/null +++ b/source4/libads/kerberos.c @@ -0,0 +1,140 @@ +/* + Unix SMB/CIFS implementation. + kerberos utility library + Copyright (C) Andrew Tridgell 2001 + Copyright (C) Remus Koos 2001 + + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" + +#ifdef HAVE_KRB5 + +/* + we use a prompter to avoid a crash bug in the kerberos libs when + dealing with empty passwords + this prompter is just a string copy ... +*/ +static krb5_error_code +kerb_prompter(krb5_context ctx, void *data, + const char *name, + const char *banner, + int num_prompts, + krb5_prompt prompts[]) +{ + if (num_prompts == 0) return 0; + + memset(prompts[0].reply->data, 0, prompts[0].reply->length); + if (prompts[0].reply->length > 0) { + if (data) { + strncpy(prompts[0].reply->data, data, prompts[0].reply->length-1); + prompts[0].reply->length = strlen(prompts[0].reply->data); + } else { + prompts[0].reply->length = 0; + } + } + return 0; +} + +/* + simulate a kinit, putting the tgt in the default cache location + remus@snapserver.com +*/ +int kerberos_kinit_password(const char *principal, const char *password, int time_offset) +{ + krb5_context ctx; + krb5_error_code code = 0; + krb5_ccache cc; + krb5_principal me; + krb5_creds my_creds; + + if ((code = krb5_init_context(&ctx))) + return code; + + if (time_offset != 0) { + krb5_set_real_time(ctx, time(NULL) + time_offset, 0); + } + + if ((code = krb5_cc_default(ctx, &cc))) { + krb5_free_context(ctx); + return code; + } + + if ((code = krb5_parse_name(ctx, principal, &me))) { + krb5_free_context(ctx); + return code; + } + + if ((code = krb5_get_init_creds_password(ctx, &my_creds, me, NULL, + kerb_prompter, + password, 0, NULL, NULL))) { + krb5_free_principal(ctx, me); + krb5_free_context(ctx); + return code; + } + + if ((code = krb5_cc_initialize(ctx, cc, me))) { + krb5_free_cred_contents(ctx, &my_creds); + krb5_free_principal(ctx, me); + krb5_free_context(ctx); + return code; + } + + if ((code = krb5_cc_store_cred(ctx, cc, &my_creds))) { + krb5_cc_close(ctx, cc); + krb5_free_cred_contents(ctx, &my_creds); + krb5_free_principal(ctx, me); + krb5_free_context(ctx); + return code; + } + + krb5_cc_close(ctx, cc); + krb5_free_cred_contents(ctx, &my_creds); + krb5_free_principal(ctx, me); + krb5_free_context(ctx); + + return 0; +} + + + +/* run kinit to setup our ccache */ +int ads_kinit_password(ADS_STRUCT *ads) +{ + char *s; + int ret; + + if (asprintf(&s, "%s@%s", ads->auth.user_name, ads->auth.realm) == -1) { + return KRB5_CC_NOMEM; + } + + if (!ads->auth.password) { + return KRB5_LIBOS_CANTREADPWD; + } + + ret = kerberos_kinit_password(s, ads->auth.password, ads->auth.time_offset); + + if (ret) { + DEBUG(0,("kerberos_kinit_password %s failed: %s\n", + s, error_message(ret))); + } + free(s); + return ret; +} + + +#endif |