141 lines
4.4 KiB
C
141 lines
4.4 KiB
C
/*
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* Copyright 2015-2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "internal/e_os.h"
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#include "internal/cryptlib.h"
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#include <stdio.h>
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#include <openssl/asn1t.h>
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#include <openssl/conf.h>
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#include <openssl/x509v3.h>
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#include "ext_dat.h"
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#include "x509_local.h"
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static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method,
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TLS_FEATURE *tls_feature,
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STACK_OF(CONF_VALUE) *ext_list);
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static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method,
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X509V3_CTX *ctx,
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STACK_OF(CONF_VALUE) *nval);
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ASN1_ITEM_TEMPLATE(TLS_FEATURE) =
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ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, TLS_FEATURE, ASN1_INTEGER)
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static_ASN1_ITEM_TEMPLATE_END(TLS_FEATURE)
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IMPLEMENT_ASN1_ALLOC_FUNCTIONS(TLS_FEATURE)
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const X509V3_EXT_METHOD ossl_v3_tls_feature = {
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NID_tlsfeature, 0,
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ASN1_ITEM_ref(TLS_FEATURE),
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0, 0, 0, 0,
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0, 0,
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(X509V3_EXT_I2V)i2v_TLS_FEATURE,
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(X509V3_EXT_V2I)v2i_TLS_FEATURE,
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0, 0,
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NULL
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};
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typedef struct {
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long num;
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const char *name;
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} TLS_FEATURE_NAME;
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static TLS_FEATURE_NAME tls_feature_tbl[] = {
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{ 5, "status_request" },
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{ 17, "status_request_v2" }
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};
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/*
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* i2v_TLS_FEATURE converts the TLS_FEATURE structure tls_feature into the
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* STACK_OF(CONF_VALUE) structure ext_list. STACK_OF(CONF_VALUE) is the format
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* used by the CONF library to represent a multi-valued extension. ext_list is
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* returned.
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*/
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static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method,
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TLS_FEATURE *tls_feature,
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STACK_OF(CONF_VALUE) *ext_list)
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{
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int i;
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size_t j;
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ASN1_INTEGER *ai;
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long tlsextid;
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for (i = 0; i < sk_ASN1_INTEGER_num(tls_feature); i++) {
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ai = sk_ASN1_INTEGER_value(tls_feature, i);
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tlsextid = ASN1_INTEGER_get(ai);
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for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++)
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if (tlsextid == tls_feature_tbl[j].num)
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break;
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if (j < OSSL_NELEM(tls_feature_tbl))
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X509V3_add_value(NULL, tls_feature_tbl[j].name, &ext_list);
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else
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X509V3_add_value_int(NULL, ai, &ext_list);
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}
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return ext_list;
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}
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/*
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* v2i_TLS_FEATURE converts the multi-valued extension nval into a TLS_FEATURE
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* structure, which is returned if the conversion is successful. In case of
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* error, NULL is returned.
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*/
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static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method,
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X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
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{
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TLS_FEATURE *tlsf;
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char *extval, *endptr;
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ASN1_INTEGER *ai = NULL;
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CONF_VALUE *val;
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int i;
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size_t j;
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long tlsextid;
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if ((tlsf = sk_ASN1_INTEGER_new_null()) == NULL) {
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ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
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return NULL;
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}
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for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
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val = sk_CONF_VALUE_value(nval, i);
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if (val->value)
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extval = val->value;
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else
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extval = val->name;
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for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++)
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if (OPENSSL_strcasecmp(extval, tls_feature_tbl[j].name) == 0)
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break;
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if (j < OSSL_NELEM(tls_feature_tbl))
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tlsextid = tls_feature_tbl[j].num;
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else {
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tlsextid = strtol(extval, &endptr, 10);
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if (((*endptr) != '\0') || (extval == endptr) || (tlsextid < 0) ||
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(tlsextid > 65535)) {
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ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_SYNTAX);
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X509V3_conf_add_error_name_value(val);
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goto err;
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}
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}
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if ((ai = ASN1_INTEGER_new()) == NULL
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|| !ASN1_INTEGER_set(ai, tlsextid)
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|| sk_ASN1_INTEGER_push(tlsf, ai) <= 0) {
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ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
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goto err;
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}
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/* So it doesn't get purged if an error occurs next time around */
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ai = NULL;
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}
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return tlsf;
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err:
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sk_ASN1_INTEGER_pop_free(tlsf, ASN1_INTEGER_free);
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ASN1_INTEGER_free(ai);
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return NULL;
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}
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