crypto/x509/v3_bcons.c

   1 /*
   2  * Copyright 1999-2021 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/asn1.h>
  13 #include <openssl/asn1t.h>
  14 #include <openssl/conf.h>
  15 #include <openssl/x509v3.h>
  16 #include "ext_dat.h"
  17 #include "x509_local.h"
  18
  19 static STACK_OF(CONF_VALUE) *i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
  20                                                    BASIC_CONSTRAINTS *bcons,
  21                                                    STACK_OF(CONF_VALUE)
  22                                                    *extlist);
  23 static BASIC_CONSTRAINTS *v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
  24                                                 X509V3_CTX *ctx,
  25                                                 STACK_OF(CONF_VALUE) *values);
  26
  27 const X509V3_EXT_METHOD ossl_v3_bcons = {
  28     NID_basic_constraints, 0,
  29     ASN1_ITEM_ref(BASIC_CONSTRAINTS),
  30     0, 0, 0, 0,
  31     0, 0,
  32     (X509V3_EXT_I2V) i2v_BASIC_CONSTRAINTS,
  33     (X509V3_EXT_V2I)v2i_BASIC_CONSTRAINTS,
  34     NULL, NULL,
  35     NULL
  36 };
  37
  38 ASN1_SEQUENCE(BASIC_CONSTRAINTS) = {
  39         ASN1_OPT(BASIC_CONSTRAINTS, ca, ASN1_FBOOLEAN),
  40         ASN1_OPT(BASIC_CONSTRAINTS, pathlen, ASN1_INTEGER)
  41 } ASN1_SEQUENCE_END(BASIC_CONSTRAINTS)
  42
  43 IMPLEMENT_ASN1_FUNCTIONS(BASIC_CONSTRAINTS)
  44
  45 static STACK_OF(CONF_VALUE) *i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
  46                                                    BASIC_CONSTRAINTS *bcons,
  47                                                    STACK_OF(CONF_VALUE)
  48                                                    *extlist)
  49 {
  50     X509V3_add_value_bool("CA", bcons->ca, &extlist);
  51     X509V3_add_value_int("pathlen", bcons->pathlen, &extlist);
  52     return extlist;
  53 }
  54
  55 static BASIC_CONSTRAINTS *v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
  56                                                 X509V3_CTX *ctx,
  57                                                 STACK_OF(CONF_VALUE) *values)
  58 {
  59     BASIC_CONSTRAINTS *bcons = NULL;
  60     CONF_VALUE *val;
  61     int i;
  62
  63     if ((bcons = BASIC_CONSTRAINTS_new()) == NULL) {
  64         ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
  65         return NULL;
  66     }
  67     for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
  68         val = sk_CONF_VALUE_value(values, i);
  69         if (strcmp(val->name, "CA") == 0) {
  70             if (!X509V3_get_value_bool(val, &bcons->ca))
  71                 goto err;
  72         } else if (strcmp(val->name, "pathlen") == 0) {
  73             if (!X509V3_get_value_int(val, &bcons->pathlen))
  74                 goto err;
  75             /* TODO add sanity check on int value - at least, must be >= 0 */
  76         } else {
  77             ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NAME);
  78             X509V3_conf_add_error_name_value(val);
  79             goto err;
  80         }
  81     }
  82     return bcons;
  83  err:
  84     BASIC_CONSTRAINTS_free(bcons);
  85     return NULL;
  86 }