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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
#include <errno.h>
#include <talloc.h>
#include "util/util.h"
#include "responder/common/responder_common.h"
#include "responder/common/responder_cmd.h"
#include "responder/common/responder_packet.h"
#include "responder/pam/pamsrv.h"
static int pam_parse_in_data(uint8_t *body, size_t blen, struct pam_data *pd) {
int start;
int end;
int last=blen-1;
char *delim;
start = end = 0;
while ( end < last && body[end++]!='\0');
pd->user = (char *) &body[start];
delim = strchr(pd->user, SSS_DOMAIN_DELIM);
if (delim != NULL ) {
*delim = '\0';
pd->domain = delim+1;
} else {
pd->domain = NULL;
}
start = end;
while ( end < last && body[end++]!='\0');
pd->service = (char *) &body[start];
start = end;
while ( end < last && body[end++]!='\0');
pd->tty = (char *) &body[start];
start = end;
while ( end < last && body[end++]!='\0');
pd->ruser = (char *) &body[start];
start = end;
while ( end < last && body[end++]!='\0');
pd->rhost = (char *) &body[start];
start = end;
pd->authtok_type = (int) body[start];
start += sizeof(uint32_t);
pd->authtok_size = (int) body[start];
start += sizeof(uint32_t);
end = start+pd->authtok_size;
if ( pd->authtok_size == 0 ) {
pd->authtok = NULL;
} else {
if ( end <= blen ) {
pd->authtok = (uint8_t *) &body[start];
} else {
DEBUG(1, ("Invalid authtok size: %d\n", pd->authtok_size));
return EINVAL;
}
}
start = end;
pd->newauthtok_type = (int) body[start];
start += sizeof(uint32_t);
pd->newauthtok_size = (int) body[start];
start += sizeof(uint32_t);
end = start+pd->newauthtok_size;
if ( pd->newauthtok_size == 0 ) {
pd->newauthtok = NULL;
} else {
if ( end <= blen ) {
pd->newauthtok = (uint8_t *) &body[start];
} else {
DEBUG(1, ("Invalid newauthtok size: %d\n", pd->newauthtok_size));
return EINVAL;
}
}
DEBUG_PAM_DATA(4, pd);
return EOK;
}
static void pam_reply(struct cli_ctx *cctx, int pam_status, char *domain) {
struct sss_cmd_ctx *nctx;
int32_t ret_status = pam_status;
uint8_t *body;
size_t blen;
int ret;
int err = EOK;
DEBUG(4, ("pam_reply get called.\n"));
nctx = talloc_zero(cctx, struct sss_cmd_ctx);
if (!nctx) {
err = ENOMEM;
goto done;
}
nctx->cctx = cctx;
nctx->check_expiration = true;
ret = sss_packet_new(cctx->creq, 0, sss_packet_get_cmd(cctx->creq->in),
&cctx->creq->out);
if (ret != EOK) {
err = ret;
goto done;
}
ret = sss_packet_grow(cctx->creq->out, sizeof(int) + strlen(domain)+1 );
if (ret != EOK) {
err = ret;
goto done;
}
sss_packet_get_body(cctx->creq->out, &body, &blen);
DEBUG(4, ("blen: %d\n", blen));
memcpy(body, &ret_status, sizeof(int32_t));
memcpy(body+sizeof(int32_t), domain, strlen(domain)+1);
done:
sss_cmd_done(nctx);
}
static int pam_forwarder(struct cli_ctx *cctx, int pam_cmd)
{
uint8_t *body;
size_t blen;
int ret;
struct pam_data *pd;
pd = talloc(cctx, struct pam_data);
if (pd == NULL) return ENOMEM;
sss_packet_get_body(cctx->creq->in, &body, &blen);
if (blen >= sizeof(uint32_t) &&
((uint32_t *)(&body[blen - sizeof(uint32_t)]))[0] != END_OF_PAM_REQUEST) {
DEBUG(1, ("Received data not terminated.\n"));
talloc_free(pd);
return EINVAL;
}
pd->cmd = pam_cmd;
ret=pam_parse_in_data(body, blen, pd);
if( ret != 0 ) {
talloc_free(pd);
return EINVAL;
}
ret=pam_dp_send_req(cctx, pam_reply, PAM_DP_TIMEOUT, pd);
DEBUG(4, ("pam_dp_send_req returned %d\n", ret));
return ret;
}
static int pam_cmd_authenticate(struct cli_ctx *cctx) {
DEBUG(4, ("entering pam_cmd_authenticate\n"));
return pam_forwarder(cctx, SSS_PAM_AUTHENTICATE);
}
static int pam_cmd_setcred(struct cli_ctx *cctx) {
DEBUG(4, ("entering pam_cmd_setcred\n"));
return pam_forwarder(cctx, SSS_PAM_SETCRED);
}
static int pam_cmd_acct_mgmt(struct cli_ctx *cctx) {
DEBUG(4, ("entering pam_cmd_acct_mgmt\n"));
return pam_forwarder(cctx, SSS_PAM_ACCT_MGMT);
}
static int pam_cmd_open_session(struct cli_ctx *cctx) {
DEBUG(4, ("entering pam_cmd_open_session\n"));
return pam_forwarder(cctx, SSS_PAM_OPEN_SESSION);
}
static int pam_cmd_close_session(struct cli_ctx *cctx) {
DEBUG(4, ("entering pam_cmd_close_session\n"));
return pam_forwarder(cctx, SSS_PAM_CLOSE_SESSION);
}
static int pam_cmd_chauthtok(struct cli_ctx *cctx) {
DEBUG(4, ("entering pam_cmd_chauthtok\n"));
return pam_forwarder(cctx, SSS_PAM_CHAUTHTOK);
}
struct sss_cmd_table *register_sss_cmds(void) {
static struct sss_cmd_table sss_cmds[] = {
{SSS_GET_VERSION, sss_cmd_get_version},
{SSS_PAM_AUTHENTICATE, pam_cmd_authenticate},
{SSS_PAM_SETCRED, pam_cmd_setcred},
{SSS_PAM_ACCT_MGMT, pam_cmd_acct_mgmt},
{SSS_PAM_OPEN_SESSION, pam_cmd_open_session},
{SSS_PAM_CLOSE_SESSION, pam_cmd_close_session},
{SSS_PAM_CHAUTHTOK, pam_cmd_chauthtok},
{SSS_CLI_NULL, NULL}
};
return sss_cmds;
}
|
