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 /* Support for Thawte strong extranet extension */
  19
  20 #define SXNET_TEST
  21
  22 static int sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out,
  23                      int indent);
  24 #ifdef SXNET_TEST
  25 static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
  26                         STACK_OF(CONF_VALUE) *nval);
  27 #endif
  28 const 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
  43 ASN1_SEQUENCE(SXNETID) = {
  44         ASN1_SIMPLE(SXNETID, zone, ASN1_INTEGER),
  45         ASN1_SIMPLE(SXNETID, user, ASN1_OCTET_STRING)
  46 } ASN1_SEQUENCE_END(SXNETID)
  47
  48 IMPLEMENT_ASN1_FUNCTIONS(SXNETID)
  49
  50 ASN1_SEQUENCE(SXNET) = {
  51         ASN1_SIMPLE(SXNET, version, ASN1_INTEGER),
  52         ASN1_SEQUENCE_OF(SXNET, ids, SXNETID)
  53 } ASN1_SEQUENCE_END(SXNET)
  54
  55 IMPLEMENT_ASN1_FUNCTIONS(SXNET)
  56
  57 static 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         BIO_printf(out, "\n%*sZone: %s, User: ", indent, "", tmp);
  82         OPENSSL_free(tmp);
  83         ASN1_STRING_print(out, id->user);
  84     }
  85     return 1;
  86 }
  87
  88 #ifdef SXNET_TEST
  89
  90 /*
  91  * NBB: this is used for testing only. It should *not* be used for anything
  92  * else because it will just take static IDs from the configuration file and
  93  * they should really be separate values for each user.
  94  */
  95
  96 static SXNET *sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
  97                         STACK_OF(CONF_VALUE) *nval)
  98 {
  99     CONF_VALUE *cnf;
 100     SXNET *sx = NULL;
 101     int i;
 102     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 103         cnf = sk_CONF_VALUE_value(nval, i);
 104         if (!SXNET_add_id_asc(&sx, cnf->name, cnf->value, -1))
 105             return NULL;
 106     }
 107     return sx;
 108 }
 109
 110 #endif
 111
 112 /* Strong Extranet utility functions */
 113
 114 /* Add an id given the zone as an ASCII number */
 115
 116 int SXNET_add_id_asc(SXNET **psx, const char *zone, const char *user, int userlen)
 117 {
 118     ASN1_INTEGER *izone;
 119
 120     if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
 121         ERR_raise(ERR_LIB_X509V3, X509V3_R_ERROR_CONVERTING_ZONE);
 122         return 0;
 123     }
 124     return SXNET_add_id_INTEGER(psx, izone, user, userlen);
 125 }
 126
 127 /* Add an id given the zone as an unsigned long */
 128
 129 int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, const char *user,
 130                        int userlen)
 131 {
 132     ASN1_INTEGER *izone;
 133
 134     if ((izone = ASN1_INTEGER_new()) == NULL
 135         || !ASN1_INTEGER_set(izone, lzone)) {
 136         ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
 137         ASN1_INTEGER_free(izone);
 138         return 0;
 139     }
 140     return SXNET_add_id_INTEGER(psx, izone, user, userlen);
 141
 142 }
 143
 144 /*
 145  * Add an id given the zone as an ASN1_INTEGER. Note this version uses the
 146  * passed integer and doesn't make a copy so don't free it up afterwards.
 147  */
 148
 149 int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, const char *user,
 150                          int userlen)
 151 {
 152     SXNET *sx = NULL;
 153     SXNETID *id = NULL;
 154
 155     if (psx == NULL || zone == NULL || user == NULL) {
 156         ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_ARGUMENT);
 157         return 0;
 158     }
 159     if (userlen == -1)
 160         userlen = strlen(user);
 161     if (userlen > 64) {
 162         ERR_raise(ERR_LIB_X509V3, X509V3_R_USER_TOO_LONG);
 163         return 0;
 164     }
 165     if (*psx == NULL) {
 166         if ((sx = SXNET_new()) == NULL)
 167             goto err;
 168         if (!ASN1_INTEGER_set(sx->version, 0))
 169             goto err;
 170         *psx = sx;
 171     } else
 172         sx = *psx;
 173     if (SXNET_get_id_INTEGER(sx, zone)) {
 174         ERR_raise(ERR_LIB_X509V3, X509V3_R_DUPLICATE_ZONE_ID);
 175         return 0;
 176     }
 177
 178     if ((id = SXNETID_new()) == NULL)
 179         goto err;
 180     if (userlen == -1)
 181         userlen = strlen(user);
 182
 183     if (!ASN1_OCTET_STRING_set(id->user, (const unsigned char *)user, userlen))
 184         goto err;
 185     if (!sk_SXNETID_push(sx->ids, id))
 186         goto err;
 187     id->zone = zone;
 188     return 1;
 189
 190  err:
 191     ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
 192     SXNETID_free(id);
 193     SXNET_free(sx);
 194     *psx = NULL;
 195     return 0;
 196 }
 197
 198 ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone)
 199 {
 200     ASN1_INTEGER *izone;
 201     ASN1_OCTET_STRING *oct;
 202
 203     if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
 204         ERR_raise(ERR_LIB_X509V3, X509V3_R_ERROR_CONVERTING_ZONE);
 205         return NULL;
 206     }
 207     oct = SXNET_get_id_INTEGER(sx, izone);
 208     ASN1_INTEGER_free(izone);
 209     return oct;
 210 }
 211
 212 ASN1_OCTET_STRING *SXNET_get_id_ulong(SXNET *sx, unsigned long lzone)
 213 {
 214     ASN1_INTEGER *izone;
 215     ASN1_OCTET_STRING *oct;
 216
 217     if ((izone = ASN1_INTEGER_new()) == NULL
 218         || !ASN1_INTEGER_set(izone, lzone)) {
 219         ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
 220         ASN1_INTEGER_free(izone);
 221         return NULL;
 222     }
 223     oct = SXNET_get_id_INTEGER(sx, izone);
 224     ASN1_INTEGER_free(izone);
 225     return oct;
 226 }
 227
 228 ASN1_OCTET_STRING *SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone)
 229 {
 230     SXNETID *id;
 231     int i;
 232     for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
 233         id = sk_SXNETID_value(sx->ids, i);
 234         if (!ASN1_INTEGER_cmp(id->zone, zone))
 235             return id->user;
 236     }
 237     return NULL;
 238 }