File: acm.c

package info (click to toggle)
spread 3.17.3-5
  • links: PTS
  • area: main
  • in suites: etch, etch-m68k
  • size: 1,748 kB
  • ctags: 2,313
  • sloc: ansic: 15,627; sh: 2,591; java: 2,290; perl: 556; yacc: 523; makefile: 240; lex: 204; xml: 77
file content (362 lines) | stat: -rw-r--r-- 10,280 bytes parent folder | download | duplicates (3)
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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
/*
 * The Spread Toolkit.
 *     
 * The contents of this file are subject to the Spread Open-Source
 * License, Version 1.0 (the ``License''); you may not use
 * this file except in compliance with the License.  You may obtain a
 * copy of the License at:
 *
 * http://www.spread.org/license/
 *
 * or in the file ``license.txt'' found in this distribution.
 *
 * Software distributed under the License is distributed on an AS IS basis, 
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 * for the specific language governing rights and limitations under the 
 * License.
 *
 * The Creators of Spread are:
 *  Yair Amir, Michal Miskin-Amir, Jonathan Stanton.
 *
 *  Copyright (C) 1993-2004 Spread Concepts LLC <spread@spreadconcepts.com>
 *
 *  All Rights Reserved.
 *
 * Major Contributor(s):
 * ---------------
 *    Cristina Nita-Rotaru crisn@cs.purdue.edu - group communication security.
 *    Theo Schlossnagle    jesus@omniti.com - Perl, skiplists, autoconf.
 *    Dan Schoenblum       dansch@cnds.jhu.edu - Java interface.
 *    John Schultz         jschultz@cnds.jhu.edu - contribution to process group membership.
 *
 */


#include "arch.h"
#include <string.h>
#include <assert.h>

#include "acm.h"
#include "alarm.h"
#include "memory.h"
#include "objects.h"

struct auth_info {
    char                name[MAX_AUTH_NAME];
    bool                enabled;
    bool                required;
    struct auth_ops     ops;
};

struct acp_info {
    char                name[MAX_AUTH_NAME];
    struct acp_ops      ops;
};

static struct auth_info Auth_Methods[MAX_AUTH_METHODS];
static  int             Num_Auth_Methods;

static struct acp_info  ACP_Methods[MAX_AUTH_METHODS];
static  int             Num_ACP_Methods;

static  int             AccessControlPolicy;


static int acm_authname_to_type(char *auth_name)
{
    int i;
    for ( i=0; i < Num_Auth_Methods; i++)
    {
        if (!strncmp(Auth_Methods[i].name, auth_name, MAX_AUTH_NAME))
            return( i );
    }
    return(-1);
}

static int acm_acpname_to_type(char *acp_name)
{
    int i;
    for ( i=0; i < Num_ACP_Methods; i++)
    {
        if (!strncmp(ACP_Methods[i].name, acp_name, MAX_AUTH_NAME))
            return( i );
    }
    return(-1);
}

void Acm_init()
{
	Mem_init_object( SESSION_AUTH_INFO, sizeof( struct session_auth_info ), 0, 0 );
        /* establish default authentication -- allow all connections if nothing is configured.
         * This is overridden by whatever is configured in the spread.conf file
         */
        Acm_auth_set_enabled("NULL");

        /* establish default policy if one is not configured */
        if (!Acm_acp_set_policy("PERMIT"))
                Alarm(EXIT, "Acm_init: Unable to establish default PERMIT policy. Spread build is broken\n");
}

struct session_auth_info *Acm_auth_create_sess_info_forIP(mailbox mbox)
{
        struct session_auth_info *sess_auth_p;

        sess_auth_p = new( SESSION_AUTH_INFO );
        if (sess_auth_p == NULL) 
        {
                Alarm( EXIT, "Acm_auth_create_sess_info_forIP: Failed to allocate an struct session_auth_info\n");
                return(NULL);
        }

        sess_auth_p->mbox = mbox;
        sess_auth_p->completed_required_auths = 0;
        sess_auth_p->num_required_auths = 1;
        sess_auth_p->required_auth_methods[0] = acm_authname_to_type("IP");
        sess_auth_p->required_auth_results[0] = 0;

        return(sess_auth_p);
}

struct session_auth_info *Acm_auth_create_sess_info(mailbox mbox, char *auth_name)
{
        int num_auths, i, j, type;
        struct session_auth_info *sess_auth_p;
        bool meth_registered;

        sess_auth_p = new( SESSION_AUTH_INFO );
        if (sess_auth_p == NULL) 
        {
                Alarm( EXIT, "Acm_auth_create_sess_info: Failed to allocate an struct session_auth_info\n");
                return(NULL);
        }

        sess_auth_p->mbox = mbox;
        sess_auth_p->completed_required_auths = 0;
        
        num_auths = 0;
        i = 0;
        /* add methods client requested */
        while( auth_name[i * MAX_AUTH_NAME] != '\0')
        {
                type = acm_authname_to_type( &auth_name[i * MAX_AUTH_NAME]);
                if ( Auth_Methods[type].enabled )
                {
                        sess_auth_p->required_auth_methods[num_auths] = type;
                        num_auths++;
                }
                i++;
        }
        if (num_auths == 0 )
        {
                Alarm( ACM, "Acm_auth_create_sess_info: Client on session mbox %d failed to request any valid methods: %s\n", mbox, auth_name);
                dispose(sess_auth_p);
                return(NULL);
        }
        /* Now add required methods that were not listed by client */
        for ( i = 0; i < Num_Auth_Methods; i++)
        {
                if ( Auth_Methods[i].required )
                {
                        for (meth_registered = FALSE, j=0; j < num_auths; j++)
                        {
                                if ( sess_auth_p->required_auth_methods[j] == i )
                                        meth_registered = TRUE;
                        }
                        if ( ! meth_registered ) 
                        {
                                sess_auth_p->required_auth_methods[num_auths] = i;
                                num_auths++;
                        }
                }
        }
        if (num_auths == 0 )
        {
                Alarm( ACM, "Acm_auth_create_sess_info: Failed to find any auth methods for session mbox %d which requested %s\n", mbox, auth_name);
                dispose(sess_auth_p);
                return(NULL);
        }
        sess_auth_p->num_required_auths = num_auths;
        for (i=0; i< MAX_AUTH_METHODS; i++)
        {
                sess_auth_p->required_auth_results[i] = 0;
        }
        return(sess_auth_p);
}
bool Acm_auth_set_enabled(char *auth_name)
{
    int auth_type;
    assert(auth_name != NULL);
    auth_type = acm_authname_to_type(auth_name);
    if (auth_type == -1)
    {
        Alarm( ACM, "Acm_auth_set_enabled: unknown auth name %s\n", auth_name);
        return( FALSE );
    }
    Auth_Methods[auth_type].enabled = TRUE;
    return( TRUE );
}
bool Acm_auth_set_disabled(char *auth_name)
{
    int auth_type;
    assert(auth_name != NULL);
    auth_type = acm_authname_to_type(auth_name);
    if (auth_type == -1)
    {
        Alarm( ACM, "Acm_auth_set_disabled: unknown auth name %s\n", auth_name);
        return( FALSE );
    }
    Auth_Methods[auth_type].enabled = FALSE;
    return( TRUE );
}

bool Acm_auth_set_required(char *auth_name)
{
    int auth_type;
    assert(auth_name != NULL);
    auth_type = acm_authname_to_type(auth_name);
    if (auth_type == -1)
    {
        Alarm( ACM, "Acm_auth_set_required: unknown auth name %s\n", auth_name);
        return( FALSE );
    }
    Auth_Methods[auth_type].required = TRUE;
    return( TRUE );
}

bool Acm_auth_add_method(char *name, struct auth_ops *ops)
{
    assert(name != NULL);
    assert(ops != NULL);

    if (Num_Auth_Methods == (MAX_AUTH_METHODS) )
        return(FALSE);
    memcpy(Auth_Methods[Num_Auth_Methods].name, name, MAX_AUTH_NAME);
    Auth_Methods[Num_Auth_Methods].enabled = FALSE;
    Auth_Methods[Num_Auth_Methods].required = FALSE;
    Auth_Methods[Num_Auth_Methods].ops = *ops;

    Num_Auth_Methods++;
    return(TRUE);
}

bool Acm_auth_query_allowed(char *auth_name)
{
    int auth_type;

    assert(auth_name != NULL);

    auth_type = acm_authname_to_type(auth_name);
    if (auth_type == -1)
    {
        Alarm(ACM, "Acm_query_alloweds: unknown auth name %s\n", auth_name);
        return(FALSE);
    }
    return(Auth_Methods[auth_type].enabled);
}

void *Acm_auth_get_auth_client_connection_byname(char *auth_name)
{
    int auth_type;

    assert(auth_name != NULL);

    auth_type = acm_authname_to_type(auth_name);
    if (auth_type == -1)
    {
        Alarm(ACM, "Acm_auth_get_auth_client_connection_byname: unknown auth name %s\n", auth_name);
        return(FALSE);
    }
    return(Acm_auth_get_auth_client_connection(auth_type));
}

void *Acm_auth_get_auth_client_connection(int authid)
{
    assert( authid >= 0 );
    assert( authid < MAX_AUTH_METHODS );

    return(Auth_Methods[authid].ops.auth_client_connection);
}

char *Acm_auth_get_allowed_list(void)
{
    int i;
    static char list[MAX_AUTH_LIST_LEN];
    char *c_ptr;

    c_ptr = list;
    for ( i=0; i < Num_Auth_Methods; i++)
    {
        if (Auth_Methods[i].enabled)
        {
            sprintf(c_ptr, "%s ", Auth_Methods[i].name);
            c_ptr += strlen(Auth_Methods[i].name);
            c_ptr++; /* for space */
        }
    }
    *c_ptr = 0; /* null terminate */
    return(list);
}

bool Acm_acp_add_method(char *name, struct acp_ops *ops)
{
    assert(name != NULL);
    assert(ops != NULL);

    if (Num_ACP_Methods == (MAX_AUTH_METHODS) )
        return(FALSE);
    memcpy(ACP_Methods[Num_ACP_Methods].name, name, MAX_AUTH_NAME);
    ACP_Methods[Num_ACP_Methods].ops = *ops;

    Num_ACP_Methods++;
    return(TRUE);
}

bool Acm_acp_query_allowed(char *acp_name)
{
    int acp_type;

    assert(acp_name != NULL);

    acp_type = acm_acpname_to_type(acp_name);
    if (acp_type == -1)
    {
        Alarm(ACM, "Acm_acp_query_alloweds: unknown acp name %s\n", acp_name);
        return(FALSE);
    }
    return(TRUE);
}

bool Acm_acp_set_policy(char *policy_name)
{
    if (!Acm_acp_query_allowed(policy_name))
        return(FALSE);
    AccessControlPolicy = acm_acpname_to_type(policy_name);
    return(TRUE);
}

bool Acm_acp_fill_ops_byname(char *acp_name, struct acp_ops *acp_ops_h)
{
    int acp_type;

    assert(acp_name != NULL);
    assert(acp_ops_h != NULL);

    acp_type = acm_acpname_to_type(acp_name);
    if (acp_type == -1)
    {
        Alarm(ACM, "Acm_fill_acp_ops: unknown access control policy name %s\n", acp_name);
        return(FALSE);
    }
    *acp_ops_h = ACP_Methods[acp_type].ops;
    return(TRUE);
}

void Acm_acp_fill_ops(struct acp_ops *acp_ops_h)
{
    assert(acp_ops_h != NULL);
    assert( AccessControlPolicy >= 0 );
    assert( AccessControlPolicy < Num_ACP_Methods );

    *acp_ops_h = ACP_Methods[AccessControlPolicy].ops;
    return;
}