crypto/x509v3/v3_tlsf.c

   1 /*
   2  * Written by Rob Stradling (rob@comodo.com) for the OpenSSL project 2015.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2015 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    licensing@OpenSSL.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58 #include <stdio.h>
  59 #include "internal/cryptlib.h"
  60 #include "internal/o_str.h"
  61 #include <openssl/asn1t.h>
  62 #include <openssl/conf.h>
  63 #include <openssl/x509v3.h>
  64 #include "ext_dat.h"
  65
  66 static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method,
  67                                              TLS_FEATURE *tls_feature,
  68                                              STACK_OF(CONF_VALUE) *ext_list);
  69 static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method,
  70                                     X509V3_CTX *ctx,
  71                                     STACK_OF(CONF_VALUE) *nval);
  72
  73 ASN1_ITEM_TEMPLATE(TLS_FEATURE) =
  74         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, TLS_FEATURE, ASN1_INTEGER)
  75 static_ASN1_ITEM_TEMPLATE_END(TLS_FEATURE)
  76
  77 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(TLS_FEATURE)
  78
  79 const X509V3_EXT_METHOD v3_tls_feature = {
  80     NID_tlsfeature, 0,
  81     ASN1_ITEM_ref(TLS_FEATURE),
  82     0, 0, 0, 0,
  83     0, 0,
  84     (X509V3_EXT_I2V)i2v_TLS_FEATURE,
  85     (X509V3_EXT_V2I)v2i_TLS_FEATURE,
  86     0, 0,
  87     NULL
  88 };
  89
  90
  91 typedef struct {
  92     long num;
  93     const char *name;
  94 } TLS_FEATURE_NAME;
  95
  96 static TLS_FEATURE_NAME tls_feature_tbl[] = {
  97     { 5, "status_request" },
  98     { 17, "status_request_v2" }
  99 };
 100
 101 /*
 102  * i2v_TLS_FEATURE converts the TLS_FEATURE structure tls_feature into the
 103  * STACK_OF(CONF_VALUE) structure ext_list. STACK_OF(CONF_VALUE) is the format
 104  * used by the CONF library to represent a multi-valued extension.  ext_list is
 105  * returned.
 106  */
 107 static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method,
 108                                              TLS_FEATURE *tls_feature,
 109                                              STACK_OF(CONF_VALUE) *ext_list)
 110 {
 111     int i;
 112     size_t j;
 113     ASN1_INTEGER *ai;
 114     long tlsextid;
 115     for (i = 0; i < sk_ASN1_INTEGER_num(tls_feature); i++) {
 116         ai = sk_ASN1_INTEGER_value(tls_feature, i);
 117         tlsextid = ASN1_INTEGER_get(ai);
 118         for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++)
 119             if (tlsextid == tls_feature_tbl[j].num)
 120                 break;
 121         if (j < OSSL_NELEM(tls_feature_tbl))
 122             X509V3_add_value(NULL, tls_feature_tbl[j].name, &ext_list);
 123         else
 124             X509V3_add_value_int(NULL, ai, &ext_list);
 125     }
 126     return ext_list;
 127 }
 128
 129 /*
 130  * v2i_TLS_FEATURE converts the multi-valued extension nval into a TLS_FEATURE
 131  * structure, which is returned if the conversion is successful.  In case of
 132  * error, NULL is returned.
 133  */
 134 static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method,
 135                                     X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
 136 {
 137     TLS_FEATURE *tlsf;
 138     char *extval, *endptr;
 139     ASN1_INTEGER *ai;
 140     CONF_VALUE *val;
 141     int i;
 142     size_t j;
 143     long tlsextid;
 144
 145     if ((tlsf = sk_ASN1_INTEGER_new_null()) == NULL) {
 146         X509V3err(X509V3_F_V2I_TLS_FEATURE, ERR_R_MALLOC_FAILURE);
 147         return NULL;
 148     }
 149
 150     for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 151         val = sk_CONF_VALUE_value(nval, i);
 152         if (val->value)
 153             extval = val->value;
 154         else
 155             extval = val->name;
 156
 157         for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++)
 158             if (OPENSSL_strcasecmp(extval, tls_feature_tbl[j].name) == 0)
 159                 break;
 160         if (j < OSSL_NELEM(tls_feature_tbl))
 161             tlsextid = tls_feature_tbl[j].num;
 162         else {
 163             tlsextid = strtol(extval, &endptr, 10);
 164             if (((*endptr) != '\0') || (extval == endptr) || (tlsextid < 0) ||
 165                 (tlsextid > 65535)) {
 166                 X509V3err(X509V3_F_V2I_TLS_FEATURE, X509V3_R_INVALID_SYNTAX);
 167                 X509V3_conf_err(val);
 168                 goto err;
 169             }
 170         }
 171
 172         ai = ASN1_INTEGER_new();
 173         if (ai == NULL) {
 174             X509V3err(X509V3_F_V2I_TLS_FEATURE, ERR_R_MALLOC_FAILURE);
 175             goto err;
 176         }
 177         ASN1_INTEGER_set(ai, tlsextid);
 178         sk_ASN1_INTEGER_push(tlsf, ai);
 179     }
 180     return tlsf;
 181
 182  err:
 183     sk_ASN1_INTEGER_pop_free(tlsf, ASN1_INTEGER_free);
 184     return NULL;
 185 }