v3_tlsf.c
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/*
* Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "e_os.h"
#include "internal/cryptlib.h"
#include <stdio.h>
#include "internal/o_str.h"
#include <openssl/asn1t.h>
#include <openssl/conf.h>
#include <openssl/x509v3.h>
#include "ext_dat.h"
static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method,
TLS_FEATURE *tls_feature,
STACK_OF(CONF_VALUE) *ext_list);
static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method,
X509V3_CTX *ctx,
STACK_OF(CONF_VALUE) *nval);
ASN1_ITEM_TEMPLATE(TLS_FEATURE) =
ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, TLS_FEATURE, ASN1_INTEGER)
static_ASN1_ITEM_TEMPLATE_END(TLS_FEATURE)
IMPLEMENT_ASN1_ALLOC_FUNCTIONS(TLS_FEATURE)
const X509V3_EXT_METHOD v3_tls_feature = {
NID_tlsfeature, 0,
ASN1_ITEM_ref(TLS_FEATURE),
0, 0, 0, 0,
0, 0,
(X509V3_EXT_I2V)i2v_TLS_FEATURE,
(X509V3_EXT_V2I)v2i_TLS_FEATURE,
0, 0,
NULL
};
typedef struct {
long num;
const char *name;
} TLS_FEATURE_NAME;
static TLS_FEATURE_NAME tls_feature_tbl[] = {
{ 5, "status_request" },
{ 17, "status_request_v2" }
};
/*
* i2v_TLS_FEATURE converts the TLS_FEATURE structure tls_feature into the
* STACK_OF(CONF_VALUE) structure ext_list. STACK_OF(CONF_VALUE) is the format
* used by the CONF library to represent a multi-valued extension. ext_list is
* returned.
*/
static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method,
TLS_FEATURE *tls_feature,
STACK_OF(CONF_VALUE) *ext_list)
{
int i;
size_t j;
ASN1_INTEGER *ai;
long tlsextid;
for (i = 0; i < sk_ASN1_INTEGER_num(tls_feature); i++) {
ai = sk_ASN1_INTEGER_value(tls_feature, i);
tlsextid = ASN1_INTEGER_get(ai);
for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++)
if (tlsextid == tls_feature_tbl[j].num)
break;
if (j < OSSL_NELEM(tls_feature_tbl))
X509V3_add_value(NULL, tls_feature_tbl[j].name, &ext_list);
else
X509V3_add_value_int(NULL, ai, &ext_list);
}
return ext_list;
}
/*
* v2i_TLS_FEATURE converts the multi-valued extension nval into a TLS_FEATURE
* structure, which is returned if the conversion is successful. In case of
* error, NULL is returned.
*/
static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method,
X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
{
TLS_FEATURE *tlsf;
char *extval, *endptr;
ASN1_INTEGER *ai;
CONF_VALUE *val;
int i;
size_t j;
long tlsextid;
if ((tlsf = sk_ASN1_INTEGER_new_null()) == NULL) {
X509V3err(X509V3_F_V2I_TLS_FEATURE, ERR_R_MALLOC_FAILURE);
return NULL;
}
for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
val = sk_CONF_VALUE_value(nval, i);
if (val->value)
extval = val->value;
else
extval = val->name;
for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++)
if (strcasecmp(extval, tls_feature_tbl[j].name) == 0)
break;
if (j < OSSL_NELEM(tls_feature_tbl))
tlsextid = tls_feature_tbl[j].num;
else {
tlsextid = strtol(extval, &endptr, 10);
if (((*endptr) != '\0') || (extval == endptr) || (tlsextid < 0) ||
(tlsextid > 65535)) {
X509V3err(X509V3_F_V2I_TLS_FEATURE, X509V3_R_INVALID_SYNTAX);
X509V3_conf_err(val);
goto err;
}
}
if ((ai = ASN1_INTEGER_new()) == NULL
|| !ASN1_INTEGER_set(ai, tlsextid)
|| sk_ASN1_INTEGER_push(tlsf, ai) <= 0) {
X509V3err(X509V3_F_V2I_TLS_FEATURE, ERR_R_MALLOC_FAILURE);
goto err;
}
}
return tlsf;
err:
sk_ASN1_INTEGER_pop_free(tlsf, ASN1_INTEGER_free);
return NULL;
}