crypto/x509/v3_sxnet.c

   1 /*
   2  * Copyright 1999-2022 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         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
  98 static 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             return NULL;
 108     }
 109     return sx;
 110 }
 111
 112 #endif
 113
 114 /* Strong Extranet utility functions */
 115
 116 /* Add an id given the zone as an ASCII number */
 117
 118 int SXNET_add_id_asc(SXNET **psx, const char *zone, const char *user, int userlen)
 119 {
 120     ASN1_INTEGER *izone;
 121
 122     if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
 123         ERR_raise(ERR_LIB_X509V3, X509V3_R_ERROR_CONVERTING_ZONE);
 124         return 0;
 125     }
 126     if (!SXNET_add_id_INTEGER(psx, izone, user, userlen)) {
 127         ASN1_INTEGER_free(izone);
 128         return 0;
 129     }
 130     return 1;
 131 }
 132
 133 /* Add an id given the zone as an unsigned long */
 134
 135 int SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, const char *user,
 136                        int userlen)
 137 {
 138     ASN1_INTEGER *izone;
 139
 140     if ((izone = ASN1_INTEGER_new()) == NULL
 141         || !ASN1_INTEGER_set(izone, lzone)) {
 142         ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 143         ASN1_INTEGER_free(izone);
 144         return 0;
 145     }
 146     if (!SXNET_add_id_INTEGER(psx, izone, user, userlen)) {
 147         ASN1_INTEGER_free(izone);
 148         return 0;
 149     }
 150     return 1;
 151 }
 152
 153 /*
 154  * Add an id given the zone as an ASN1_INTEGER. Note this version uses the
 155  * passed integer and doesn't make a copy so don't free it up afterwards.
 156  */
 157
 158 int SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, const char *user,
 159                          int userlen)
 160 {
 161     SXNET *sx = NULL;
 162     SXNETID *id = NULL;
 163
 164     if (psx == NULL || zone == NULL || user == NULL) {
 165         ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_ARGUMENT);
 166         return 0;
 167     }
 168     if (userlen == -1)
 169         userlen = strlen(user);
 170     if (userlen > 64) {
 171         ERR_raise(ERR_LIB_X509V3, X509V3_R_USER_TOO_LONG);
 172         return 0;
 173     }
 174     if (*psx == NULL) {
 175         if ((sx = SXNET_new()) == NULL) {
 176             ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 177             goto err;
 178         }
 179         if (!ASN1_INTEGER_set(sx->version, 0)) {
 180             ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 181             goto err;
 182         }
 183     } else
 184         sx = *psx;
 185     if (SXNET_get_id_INTEGER(sx, zone)) {
 186         ERR_raise(ERR_LIB_X509V3, X509V3_R_DUPLICATE_ZONE_ID);
 187         if (*psx == NULL)
 188             SXNET_free(sx);
 189         return 0;
 190     }
 191
 192     if ((id = SXNETID_new()) == NULL) {
 193         ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 194         goto err;
 195     }
 196
 197     if (!ASN1_OCTET_STRING_set(id->user, (const unsigned char *)user, userlen)){
 198         ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 199         goto err;
 200     }
 201     if (!sk_SXNETID_push(sx->ids, id)) {
 202         ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
 203         goto err;
 204     }
 205     id->zone = zone;
 206     *psx = sx;
 207     return 1;
 208
 209  err:
 210     SXNETID_free(id);
 211     if (*psx == NULL)
 212         SXNET_free(sx);
 213     return 0;
 214 }
 215
 216 ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone)
 217 {
 218     ASN1_INTEGER *izone;
 219     ASN1_OCTET_STRING *oct;
 220
 221     if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
 222         ERR_raise(ERR_LIB_X509V3, X509V3_R_ERROR_CONVERTING_ZONE);
 223         return NULL;
 224     }
 225     oct = SXNET_get_id_INTEGER(sx, izone);
 226     ASN1_INTEGER_free(izone);
 227     return oct;
 228 }
 229
 230 ASN1_OCTET_STRING *SXNET_get_id_ulong(SXNET *sx, unsigned long lzone)
 231 {
 232     ASN1_INTEGER *izone;
 233     ASN1_OCTET_STRING *oct;
 234
 235     if ((izone = ASN1_INTEGER_new()) == NULL
 236         || !ASN1_INTEGER_set(izone, lzone)) {
 237         ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 238         ASN1_INTEGER_free(izone);
 239         return NULL;
 240     }
 241     oct = SXNET_get_id_INTEGER(sx, izone);
 242     ASN1_INTEGER_free(izone);
 243     return oct;
 244 }
 245
 246 ASN1_OCTET_STRING *SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone)
 247 {
 248     SXNETID *id;
 249     int i;
 250     for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
 251         id = sk_SXNETID_value(sx->ids, i);
 252         if (!ASN1_INTEGER_cmp(id->zone, zone))
 253             return id->user;
 254     }
 255     return NULL;
 256 }