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             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
 120 int 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
 137 int 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_ASN1_LIB);
 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
 160 int 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             ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 179             goto err;
 180         }
 181         if (!ASN1_INTEGER_set(sx->version, 0)) {
 182             ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 183             goto err;
 184         }
 185     } else
 186         sx = *psx;
 187     if (SXNET_get_id_INTEGER(sx, zone)) {
 188         ERR_raise(ERR_LIB_X509V3, X509V3_R_DUPLICATE_ZONE_ID);
 189         if (*psx == NULL)
 190             SXNET_free(sx);
 191         return 0;
 192     }
 193
 194     if ((id = SXNETID_new()) == NULL) {
 195         ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 196         goto err;
 197     }
 198
 199     if (!ASN1_OCTET_STRING_set(id->user, (const unsigned char *)user, userlen)){
 200         ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 201         goto err;
 202     }
 203     if (!sk_SXNETID_push(sx->ids, id)) {
 204         ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
 205         goto err;
 206     }
 207     ASN1_INTEGER_free(id->zone);
 208     id->zone = zone;
 209     *psx = sx;
 210     return 1;
 211
 212  err:
 213     SXNETID_free(id);
 214     if (*psx == NULL)
 215         SXNET_free(sx);
 216     return 0;
 217 }
 218
 219 ASN1_OCTET_STRING *SXNET_get_id_asc(SXNET *sx, const char *zone)
 220 {
 221     ASN1_INTEGER *izone;
 222     ASN1_OCTET_STRING *oct;
 223
 224     if ((izone = s2i_ASN1_INTEGER(NULL, zone)) == NULL) {
 225         ERR_raise(ERR_LIB_X509V3, X509V3_R_ERROR_CONVERTING_ZONE);
 226         return NULL;
 227     }
 228     oct = SXNET_get_id_INTEGER(sx, izone);
 229     ASN1_INTEGER_free(izone);
 230     return oct;
 231 }
 232
 233 ASN1_OCTET_STRING *SXNET_get_id_ulong(SXNET *sx, unsigned long lzone)
 234 {
 235     ASN1_INTEGER *izone;
 236     ASN1_OCTET_STRING *oct;
 237
 238     if ((izone = ASN1_INTEGER_new()) == NULL
 239         || !ASN1_INTEGER_set(izone, lzone)) {
 240         ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
 241         ASN1_INTEGER_free(izone);
 242         return NULL;
 243     }
 244     oct = SXNET_get_id_INTEGER(sx, izone);
 245     ASN1_INTEGER_free(izone);
 246     return oct;
 247 }
 248
 249 ASN1_OCTET_STRING *SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone)
 250 {
 251     SXNETID *id;
 252     int i;
 253     for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {
 254         id = sk_SXNETID_value(sx->ids, i);
 255         if (!ASN1_INTEGER_cmp(id->zone, zone))
 256             return id->user;
 257     }
 258     return NULL;
 259 }