summaryrefslogtreecommitdiff
path: root/src/providers/krb5/krb5_init.c
blob: 43cbc1bc7d04d0aac9c0a7cc4645d8e4c4ff0421 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
    SSSD

    Kerberos 5 Backend Module

    Authors:
        Sumit Bose <sbose@redhat.com>

    Copyright (C) 2009 Red Hat

    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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "providers/child_common.h"
#include "providers/krb5/krb5_auth.h"
#include "providers/krb5/krb5_common.h"

struct krb5_options {
    struct dp_option *opts;
    struct krb5_ctx *auth_ctx;
};

struct krb5_options *krb5_options = NULL;

struct bet_ops krb5_auth_ops = {
    .handler = krb5_pam_handler,
    .finalize = NULL,
};

int sssm_krb5_auth_init(struct be_ctx *bectx,
                        struct bet_ops **ops,
                        void **pvt_auth_data)
{
    struct krb5_ctx *ctx = NULL;
    int ret;
    struct tevent_signal *sige;
    unsigned v;
    FILE *debug_filep;
    const char *krb5_servers;
    const char *krb5_realm;

    if (krb5_options == NULL) {
        krb5_options = talloc_zero(bectx, struct krb5_options);
        if (krb5_options == NULL) {
            DEBUG(1, ("talloc_zero failed.\n"));
            return ENOMEM;
        }
        ret = krb5_get_options(krb5_options, bectx->cdb, bectx->conf_path,
                               &krb5_options->opts);
        if (ret != EOK) {
            DEBUG(1, ("krb5_get_options failed.\n"));
            return ret;
        }
    }

    if (krb5_options->auth_ctx != NULL) {
        *ops = &krb5_auth_ops;
        *pvt_auth_data = krb5_options->auth_ctx;
        return EOK;
    }

    ctx = talloc_zero(bectx, struct krb5_ctx);
    if (!ctx) {
        DEBUG(1, ("talloc failed.\n"));
        return ENOMEM;
    }

    ctx->action = INIT_PW;
    ctx->opts = krb5_options->opts;

    krb5_servers = dp_opt_get_string(ctx->opts, KRB5_KDC);
    if (krb5_servers == NULL) {
        DEBUG(0, ("Missing krb5_kdcip option!\n"));
        return EINVAL;
    }

    krb5_realm = dp_opt_get_string(ctx->opts, KRB5_REALM);
    if (krb5_realm == NULL) {
        DEBUG(0, ("Missing krb5_realm option!\n"));
        return EINVAL;
    }

    ret = krb5_service_init(ctx, bectx, "KRB5", krb5_servers, krb5_realm,
                            &ctx->service);
    if (ret != EOK) {
        DEBUG(0, ("Failed to init IPA failover service!\n"));
        return ret;
    }

    ret = check_and_export_options(ctx->opts, bectx->domain);
    if (ret != EOK) {
        DEBUG(1, ("check_and_export_options failed.\n"));
        goto fail;
    }

    sige = tevent_add_signal(bectx->ev, ctx, SIGCHLD, SA_SIGINFO,
                             child_sig_handler, NULL);
    if (sige == NULL) {
        DEBUG(1, ("tevent_add_signal failed.\n"));
        ret = ENOMEM;
        goto fail;
    }

    if (debug_to_file != 0) {
        ret = open_debug_file_ex("krb5_child", &debug_filep);
        if (ret != EOK) {
            DEBUG(0, ("Error setting up logging (%d) [%s]\n",
                    ret, strerror(ret)));
            goto fail;
        }

        ctx->child_debug_fd = fileno(debug_filep);
        if (ctx->child_debug_fd == -1) {
            DEBUG(0, ("fileno failed [%d][%s]\n", errno, strerror(errno)));
            ret = errno;
            goto fail;
        }

        v = fcntl(ctx->child_debug_fd, F_GETFD, 0);
        fcntl(ctx->child_debug_fd, F_SETFD, v & ~FD_CLOEXEC);
    }

    *ops = &krb5_auth_ops;
    *pvt_auth_data = ctx;
    return EOK;

fail:
    talloc_free(ctx);
    return ret;
}

int sssm_krb5_chpass_init(struct be_ctx *bectx,
                          struct bet_ops **ops,
                          void **pvt_auth_data)
{
    return sssm_krb5_auth_init(bectx, ops, pvt_auth_data);
}