crypto/x509/v3_sxnet.c

   1 /*
   2  * Copyright 1999-2020 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 DEFINE_STACK_OF(SXNETID)
  19 DEFINE_STACK_OF(CONF_VALUE)
  20
  21 /* Support for Thawte strong extranet extension */
  22
  23 #define SXNET_TEST
  24
  25 static int sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out,
  26                      int indent);
  27 #ifdef SXNET_TEST
  28 static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
  29                         STACK_OF(CONF_VALUE) *nval);
  30 #endif
  31 const X509V3_EXT_METHOD v3_sxnet = {
  32     NID_sxnet, X509V3_EXT_MULTILINE, ASN1_ITEM_ref(SXNET),
  33     0, 0, 0, 0,
  34     0, 0,
  35     0,
  36 #ifdef SXNET_TEST
  37     (X509V3_EXT_V2I)sxnet_v2i,
  38 #else
  39     0,
  40 #endif
  41     (X509V3_EXT_I2R)sxnet_i2r,
  42     0,
  43     NULL
  44 };
  45
  46 ASN1_SEQUENCE(SXNETID) = {
  47         ASN1_SIMPLE(SXNETID, zone, ASN1_INTEGER),
  48         ASN1_SIMPLE(SXNETID, user, ASN1_OCTET_STRING)
  49 } ASN1_SEQUENCE_END(SXNETID)
  50
  51 IMPLEMENT_ASN1_FUNCTIONS(SXNETID)
  52
  53 ASN1_SEQUENCE(SXNET) = {
  54         ASN1_SIMPLE(SXNET, version, ASN1_INTEGER),
  55         ASN1_SEQUENCE_OF(SXNET, ids, SXNETID)
  56 } ASN1_SEQUENCE_END(SXNET)
  57
  58 IMPLEMENT_ASN1_FUNCTIONS(SXNET)
  59
  60 static int sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out,
  61                      int indent)
  62 {
  63     long v;
  64     char *tmp;
  65     SXNETID *id;
  66     int i;
  67     v = ASN1_INTEGER_get(sx->version);
  68     BIO_printf(out, "%*sVersion: %ld (0x%lX)", indent, "", v + 1, v);
  69     for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
  70         id = sk_SXNETID_value(sx->ids, i);
  71         tmp = i2s_ASN1_INTEGER(NULL, id->zone);
  72         BIO_printf(out, "\n%*sZone: %s, User: ", indent, "", tmp);
  73         OPENSSL_free(tmp);
  74         ASN1_STRING_print(out, id->user);
  75     }
  76     return 1;
  77 }
  78
  79 #ifdef SXNET_TEST
  80
  81 /*
  82  * NBB: this is used for testing only. It should *not* be used for anything
  83  * else because it will just take static IDs from the configuration file and
  84  * they should really be separate values for each user.
  85  */
  86
  87 static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
  88                         STACK_OF(CONF_VALUE) *nval)
  89 {
  90     CONF_VALUE *cnf;
  91     SXNET *sx = NULL;
  92     int i;
  93     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
  94         cnf = sk_CONF_VALUE_value(nval, i);
  95         if (!SXNET_add_id_asc(&sx, cnf->name, cnf->value, -1))
  96             return NULL;
  97     }
  98     return sx;
  99 }
 100
 101 #endif
 102
 103 /* Strong Extranet utility functions */
 104
 105 /* Add an id given the zone as an ASCII number */
 106
 107 int SXNET_add_id_asc(SXNET **psx, const char *zone, const char *user, int userlen)
 108 {
 109     ASN1_INTEGER *izone;
 110
 111     if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
 112         X509V3err(X509V3_F_SXNET_ADD_ID_ASC, X509V3_R_ERROR_CONVERTING_ZONE);
 113         return 0;
 114     }
 115     return SXNET_add_id_INTEGER(psx, izone, user, userlen);
 116 }
 117
 118 /* Add an id given the zone as an unsigned long */
 119
 120 int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, const char *user,
 121                        int userlen)
 122 {
 123     ASN1_INTEGER *izone;
 124
 125     if ((izone = ASN1_INTEGER_new()) == NULL
 126         || !ASN1_INTEGER_set(izone, lzone)) {
 127         X509V3err(X509V3_F_SXNET_ADD_ID_ULONG, ERR_R_MALLOC_FAILURE);
 128         ASN1_INTEGER_free(izone);
 129         return 0;
 130     }
 131     return SXNET_add_id_INTEGER(psx, izone, user, userlen);
 132
 133 }
 134
 135 /*
 136  * Add an id given the zone as an ASN1_INTEGER. Note this version uses the
 137  * passed integer and doesn't make a copy so don't free it up afterwards.
 138  */
 139
 140 int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, const char *user,
 141                          int userlen)
 142 {
 143     SXNET *sx = NULL;
 144     SXNETID *id = NULL;
 145
 146     if (psx == NULL || zone == NULL || user == NULL) {
 147         X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER,
 148                   X509V3_R_INVALID_NULL_ARGUMENT);
 149         return 0;
 150     }
 151     if (userlen == -1)
 152         userlen = strlen(user);
 153     if (userlen > 64) {
 154         X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, X509V3_R_USER_TOO_LONG);
 155         return 0;
 156     }
 157     if (*psx == NULL) {
 158         if ((sx = SXNET_new()) == NULL)
 159             goto err;
 160         if (!ASN1_INTEGER_set(sx->version, 0))
 161             goto err;
 162         *psx = sx;
 163     } else
 164         sx = *psx;
 165     if (SXNET_get_id_INTEGER(sx, zone)) {
 166         X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, X509V3_R_DUPLICATE_ZONE_ID);
 167         return 0;
 168     }
 169
 170     if ((id = SXNETID_new()) == NULL)
 171         goto err;
 172     if (userlen == -1)
 173         userlen = strlen(user);
 174
 175     if (!ASN1_OCTET_STRING_set(id->user, (const unsigned char *)user, userlen))
 176         goto err;
 177     if (!sk_SXNETID_push(sx->ids, id))
 178         goto err;
 179     id->zone = zone;
 180     return 1;
 181
 182  err:
 183     X509V3err(X509V3_F_SXNET_ADD_ID_INTEGER, ERR_R_MALLOC_FAILURE);
 184     SXNETID_free(id);
 185     SXNET_free(sx);
 186     *psx = NULL;
 187     return 0;
 188 }
 189
 190 ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone)
 191 {
 192     ASN1_INTEGER *izone;
 193     ASN1_OCTET_STRING *oct;
 194
 195     if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
 196         X509V3err(X509V3_F_SXNET_GET_ID_ASC, X509V3_R_ERROR_CONVERTING_ZONE);
 197         return NULL;
 198     }
 199     oct = SXNET_get_id_INTEGER(sx, izone);
 200     ASN1_INTEGER_free(izone);
 201     return oct;
 202 }
 203
 204 ASN1_OCTET_STRING *SXNET_get_id_ulong(SXNET *sx, unsigned long lzone)
 205 {
 206     ASN1_INTEGER *izone;
 207     ASN1_OCTET_STRING *oct;
 208
 209     if ((izone = ASN1_INTEGER_new()) == NULL
 210         || !ASN1_INTEGER_set(izone, lzone)) {
 211         X509V3err(X509V3_F_SXNET_GET_ID_ULONG, ERR_R_MALLOC_FAILURE);
 212         ASN1_INTEGER_free(izone);
 213         return NULL;
 214     }
 215     oct = SXNET_get_id_INTEGER(sx, izone);
 216     ASN1_INTEGER_free(izone);
 217     return oct;
 218 }
 219
 220 ASN1_OCTET_STRING *SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone)
 221 {
 222     SXNETID *id;
 223     int i;
 224     for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
 225         id = sk_SXNETID_value(sx->ids, i);
 226         if (!ASN1_INTEGER_cmp(id->zone, zone))
 227             return id->user;
 228     }
 229     return NULL;
 230 }