1/*
2 * Copyright 1999-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 ossl_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    int64_t v;
61    char *tmp;
62    SXNETID *id;
63    int i;
64
65    /*
66     * Since we add 1 to the version number to display it, we don't support
67     * LONG_MAX since that would cause on overflow.
68     */
69    if (!ASN1_INTEGER_get_int64(&v, sx->version)
70            || v >= LONG_MAX
71            || v < LONG_MIN) {
72        BIO_printf(out, "%*sVersion: <unsupported>", indent, "");
73    } else {
74        long vl = (long)v;
75
76        BIO_printf(out, "%*sVersion: %ld (0x%lX)", indent, "", vl + 1, vl);
77    }
78    for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
79        id = sk_SXNETID_value(sx->ids, i);
80        tmp = i2s_ASN1_INTEGER(NULL, id->zone);
81        if (tmp == NULL)
82            return 0;
83        BIO_printf(out, "\n%*sZone: %s, User: ", indent, "", tmp);
84        OPENSSL_free(tmp);
85        ASN1_STRING_print(out, id->user);
86    }
87    return 1;
88}
89
90#ifdef SXNET_TEST
91
92/*
93 * NBB: this is used for testing only. It should *not* be used for anything
94 * else because it will just take static IDs from the configuration file and
95 * they should really be separate values for each user.
96 */
97
98static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
99                        STACK_OF(CONF_VALUE) *nval)
100{
101    CONF_VALUE *cnf;
102    SXNET *sx = NULL;
103    int i;
104    for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
105        cnf = sk_CONF_VALUE_value(nval, i);
106        if (!SXNET_add_id_asc(&sx, cnf->name, cnf->value, -1)) {
107            SXNET_free(sx);
108            return NULL;
109	}
110    }
111    return sx;
112}
113
114#endif
115
116/* Strong Extranet utility functions */
117
118/* Add an id given the zone as an ASCII number */
119
120int SXNET_add_id_asc(SXNET **psx, const char *zone, const char *user, int userlen)
121{
122    ASN1_INTEGER *izone;
123
124    if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
125        ERR_raise(ERR_LIB_X509V3, X509V3_R_ERROR_CONVERTING_ZONE);
126        return 0;
127    }
128    if (!SXNET_add_id_INTEGER(psx, izone, user, userlen)) {
129        ASN1_INTEGER_free(izone);
130        return 0;
131    }
132    return 1;
133}
134
135/* Add an id given the zone as an unsigned long */
136
137int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, const char *user,
138                       int userlen)
139{
140    ASN1_INTEGER *izone;
141
142    if ((izone = ASN1_INTEGER_new()) == NULL
143        || !ASN1_INTEGER_set(izone, lzone)) {
144        ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
145        ASN1_INTEGER_free(izone);
146        return 0;
147    }
148    if (!SXNET_add_id_INTEGER(psx, izone, user, userlen)) {
149        ASN1_INTEGER_free(izone);
150        return 0;
151    }
152    return 1;
153}
154
155/*
156 * Add an id given the zone as an ASN1_INTEGER. Note this version uses the
157 * passed integer and doesn't make a copy so don't free it up afterwards.
158 */
159
160int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, const char *user,
161                         int userlen)
162{
163    SXNET *sx = NULL;
164    SXNETID *id = NULL;
165
166    if (psx == NULL || zone == NULL || user == NULL) {
167        ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_ARGUMENT);
168        return 0;
169    }
170    if (userlen == -1)
171        userlen = strlen(user);
172    if (userlen > 64) {
173        ERR_raise(ERR_LIB_X509V3, X509V3_R_USER_TOO_LONG);
174        return 0;
175    }
176    if (*psx == NULL) {
177        if ((sx = SXNET_new()) == NULL)
178            goto err;
179        if (!ASN1_INTEGER_set(sx->version, 0))
180            goto err;
181    } else
182        sx = *psx;
183    if (SXNET_get_id_INTEGER(sx, zone)) {
184        ERR_raise(ERR_LIB_X509V3, X509V3_R_DUPLICATE_ZONE_ID);
185        if (*psx == NULL)
186            SXNET_free(sx);
187        return 0;
188    }
189
190    if ((id = SXNETID_new()) == NULL)
191        goto err;
192    if (userlen == -1)
193        userlen = strlen(user);
194
195    if (!ASN1_OCTET_STRING_set(id->user, (const unsigned char *)user, userlen))
196        goto err;
197    if (!sk_SXNETID_push(sx->ids, id))
198        goto err;
199    ASN1_INTEGER_free(id->zone);
200    id->zone = zone;
201    *psx = sx;
202    return 1;
203
204 err:
205    ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
206    SXNETID_free(id);
207    if (*psx == NULL)
208        SXNET_free(sx);
209    return 0;
210}
211
212ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone)
213{
214    ASN1_INTEGER *izone;
215    ASN1_OCTET_STRING *oct;
216
217    if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
218        ERR_raise(ERR_LIB_X509V3, X509V3_R_ERROR_CONVERTING_ZONE);
219        return NULL;
220    }
221    oct = SXNET_get_id_INTEGER(sx, izone);
222    ASN1_INTEGER_free(izone);
223    return oct;
224}
225
226ASN1_OCTET_STRING *SXNET_get_id_ulong(SXNET *sx, unsigned long lzone)
227{
228    ASN1_INTEGER *izone;
229    ASN1_OCTET_STRING *oct;
230
231    if ((izone = ASN1_INTEGER_new()) == NULL
232        || !ASN1_INTEGER_set(izone, lzone)) {
233        ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
234        ASN1_INTEGER_free(izone);
235        return NULL;
236    }
237    oct = SXNET_get_id_INTEGER(sx, izone);
238    ASN1_INTEGER_free(izone);
239    return oct;
240}
241
242ASN1_OCTET_STRING *SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone)
243{
244    SXNETID *id;
245    int i;
246    for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
247        id = sk_SXNETID_value(sx->ids, i);
248        if (!ASN1_INTEGER_cmp(id->zone, zone))
249            return id->user;
250    }
251    return NULL;
252}
253