1/*
2 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/conf.h>
13#include <openssl/asn1.h>
14#include <openssl/asn1t.h>
15#include <openssl/x509v3.h>
16#include "ext_dat.h"
17
18/* Support for Thawte strong extranet extension */
19
20#define SXNET_TEST
21
22static int sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out,
23                     int indent);
24#ifdef SXNET_TEST
25static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
26                        STACK_OF(CONF_VALUE) *nval);
27#endif
28const X509V3_EXT_METHOD v3_sxnet = {
29    NID_sxnet, X509V3_EXT_MULTILINE, ASN1_ITEM_ref(SXNET),
30    0, 0, 0, 0,
31    0, 0,
32    0,
33#ifdef SXNET_TEST
34    (X509V3_EXT_V2I)sxnet_v2i,
35#else
36    0,
37#endif
38    (X509V3_EXT_I2R)sxnet_i2r,
39    0,
40    NULL
41};
42
43ASN1_SEQUENCE(SXNETID) = {
44        ASN1_SIMPLE(SXNETID, zone, ASN1_INTEGER),
45        ASN1_SIMPLE(SXNETID, user, ASN1_OCTET_STRING)
46} ASN1_SEQUENCE_END(SXNETID)
47
48IMPLEMENT_ASN1_FUNCTIONS(SXNETID)
49
50ASN1_SEQUENCE(SXNET) = {
51        ASN1_SIMPLE(SXNET, version, ASN1_INTEGER),
52        ASN1_SEQUENCE_OF(SXNET, ids, SXNETID)
53} ASN1_SEQUENCE_END(SXNET)
54
55IMPLEMENT_ASN1_FUNCTIONS(SXNET)
56
57static int sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out,
58                     int indent)
59{
60    long v;
61    char *tmp;
62    SXNETID *id;
63    int i;
64    v = ASN1_INTEGER_get(sx->version);
65    BIO_printf(out, "%*sVersion: %ld (0x%lX)", indent, "", v + 1, v);
66    for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
67        id = sk_SXNETID_value(sx->ids, i);
68        tmp = i2s_ASN1_INTEGER(NULL, id->zone);
69        BIO_printf(out, "\n%*sZone: %s, User: ", indent, "", tmp);
70        OPENSSL_free(tmp);
71        ASN1_STRING_print(out, id->user);
72    }
73    return 1;
74}
75
76#ifdef SXNET_TEST
77
78/*
79 * NBB: this is used for testing only. It should *not* be used for anything
80 * else because it will just take static IDs from the configuration file and
81 * they should really be separate values for each user.
82 */
83
84static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
85                        STACK_OF(CONF_VALUE) *nval)
86{
87    CONF_VALUE *cnf;
88    SXNET *sx = NULL;
89    int i;
90    for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
91        cnf = sk_CONF_VALUE_value(nval, i);
92        if (!SXNET_add_id_asc(&sx, cnf->name, cnf->value, -1))
93            return NULL;
94    }
95    return sx;
96}
97
98#endif
99
100/* Strong Extranet utility functions */
101
102/* Add an id given the zone as an ASCII number */
103
104int SXNET_add_id_asc(SXNET **psx, const char *zone, const char *user, int userlen)
105{
106    ASN1_INTEGER *izone;
107
108    if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
109        X509V3err(X509V3_F_SXNET_ADD_ID_ASC, X509V3_R_ERROR_CONVERTING_ZONE);
110        return 0;
111    }
112    return SXNET_add_id_INTEGER(psx, izone, user, userlen);
113}
114
115/* Add an id given the zone as an unsigned long */
116
117int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, const char *user,
118                       int userlen)
119{
120    ASN1_INTEGER *izone;
121
122    if ((izone = ASN1_INTEGER_new()) == NULL
123        || !ASN1_INTEGER_set(izone, lzone)) {
124        X509V3err(X509V3_F_SXNET_ADD_ID_ULONG, ERR_R_MALLOC_FAILURE);
125        ASN1_INTEGER_free(izone);
126        return 0;
127    }
128    return SXNET_add_id_INTEGER(psx, izone, user, userlen);
129
130}
131
132/*
133 * Add an id given the zone as an ASN1_INTEGER. Note this version uses the
134 * passed integer and doesn't make a copy so don't free it up afterwards.
135 */
136
137int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, const char *user,
138                         int userlen)
139{
140    SXNET *sx = NULL;
141    SXNETID *id = NULL;
142    if (!psx || !zone || !user) {
143        X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER,
144                  X509V3_R_INVALID_NULL_ARGUMENT);
145        return 0;
146    }
147    if (userlen == -1)
148        userlen = strlen(user);
149    if (userlen > 64) {
150        X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, X509V3_R_USER_TOO_LONG);
151        return 0;
152    }
153    if (*psx == NULL) {
154        if ((sx = SXNET_new()) == NULL)
155            goto err;
156        if (!ASN1_INTEGER_set(sx->version, 0))
157            goto err;
158        *psx = sx;
159    } else
160        sx = *psx;
161    if (SXNET_get_id_INTEGER(sx, zone)) {
162        X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, X509V3_R_DUPLICATE_ZONE_ID);
163        return 0;
164    }
165
166    if ((id = SXNETID_new()) == NULL)
167        goto err;
168    if (userlen == -1)
169        userlen = strlen(user);
170
171    if (!ASN1_OCTET_STRING_set(id->user, (const unsigned char *)user, userlen))
172        goto err;
173    if (!sk_SXNETID_push(sx->ids, id))
174        goto err;
175    id->zone = zone;
176    return 1;
177
178 err:
179    X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, ERR_R_MALLOC_FAILURE);
180    SXNETID_free(id);
181    SXNET_free(sx);
182    *psx = NULL;
183    return 0;
184}
185
186ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone)
187{
188    ASN1_INTEGER *izone;
189    ASN1_OCTET_STRING *oct;
190
191    if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
192        X509V3err(X509V3_F_SXNET_GET_ID_ASC, X509V3_R_ERROR_CONVERTING_ZONE);
193        return NULL;
194    }
195    oct = SXNET_get_id_INTEGER(sx, izone);
196    ASN1_INTEGER_free(izone);
197    return oct;
198}
199
200ASN1_OCTET_STRING *SXNET_get_id_ulong(SXNET *sx, unsigned long lzone)
201{
202    ASN1_INTEGER *izone;
203    ASN1_OCTET_STRING *oct;
204
205    if ((izone = ASN1_INTEGER_new()) == NULL
206        || !ASN1_INTEGER_set(izone, lzone)) {
207        X509V3err(X509V3_F_SXNET_GET_ID_ULONG, ERR_R_MALLOC_FAILURE);
208        ASN1_INTEGER_free(izone);
209        return NULL;
210    }
211    oct = SXNET_get_id_INTEGER(sx, izone);
212    ASN1_INTEGER_free(izone);
213    return oct;
214}
215
216ASN1_OCTET_STRING *SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone)
217{
218    SXNETID *id;
219    int i;
220    for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
221        id = sk_SXNETID_value(sx->ids, i);
222        if (!ASN1_INTEGER_cmp(id->zone, zone))
223            return id->user;
224    }
225    return NULL;
226}
227