自学教程：C++ ASN1_item_free函数代码示例

/* char *value:  Value    */static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid, int crit, char *value){	const X509V3_EXT_METHOD *method;	X509_EXTENSION *ext;	STACK_OF(CONF_VALUE) *nval;	void *ext_struc;	if (ext_nid == NID_undef) {		X509V3err(X509V3_F_DO_EXT_NCONF,		    X509V3_R_UNKNOWN_EXTENSION_NAME);		return NULL;	}	if (!(method = X509V3_EXT_get_nid(ext_nid))) {		X509V3err(X509V3_F_DO_EXT_NCONF, X509V3_R_UNKNOWN_EXTENSION);		return NULL;	}	/* Now get internal extension representation based on type */	if (method->v2i) {		if (*value == '@')			nval = NCONF_get_section(conf, value + 1);		else			nval = X509V3_parse_list(value);		if (sk_CONF_VALUE_num(nval) <= 0) {			X509V3err(X509V3_F_DO_EXT_NCONF,			    X509V3_R_INVALID_EXTENSION_STRING);			ERR_asprintf_error_data("name=%s,section=%s",			    OBJ_nid2sn(ext_nid), value);			return NULL;		}		ext_struc = method->v2i(method, ctx, nval);		if (*value != '@')			sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);		if (!ext_struc)			return NULL;	} else if (method->s2i) {		if (!(ext_struc = method->s2i(method, ctx, value)))			return NULL;	} else if (method->r2i) {		if (!ctx->db || !ctx->db_meth) {			X509V3err(X509V3_F_DO_EXT_NCONF,			    X509V3_R_NO_CONFIG_DATABASE);			return NULL;		}		if (!(ext_struc = method->r2i(method, ctx, value)))			return NULL;	} else {		X509V3err(X509V3_F_DO_EXT_NCONF,		    X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED);		ERR_asprintf_error_data("name=%s", OBJ_nid2sn(ext_nid));		return NULL;	}	ext = do_ext_i2d(method, ext_nid, crit, ext_struc);	if (method->it)		ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));	else		method->ext_free(ext_struc);	return ext;}

int FuzzerTestOneInput(const uint8_t *buf, size_t len) {    for (int n = 0; item_type[n] != NULL; ++n) {        const uint8_t *b = buf;        ASN1_VALUE *o = ASN1_item_d2i(NULL, &b, len, item_type[n]);        ASN1_item_free(o, item_type[n]);    }    return 0;}

int X509V3_EXT_free(int nid, void *ext_data){    const X509V3_EXT_METHOD *ext_method = X509V3_EXT_get_nid(nid);    if (ext_method == NULL) {        OPENSSL_PUT_ERROR(X509V3, X509V3_R_CANNOT_FIND_FREE_FUNCTION);        return 0;    }    if (ext_method->it != NULL)        ASN1_item_free(ext_data, ASN1_ITEM_ptr(ext_method->it));    else if (ext_method->ext_free != NULL)        ext_method->ext_free(ext_data);    else {        OPENSSL_PUT_ERROR(X509V3, X509V3_R_CANNOT_FIND_FREE_FUNCTION);        return 0;    }    return 1;}

voidNETSCAPE_SPKAC_free(NETSCAPE_SPKAC *a){	ASN1_item_free((ASN1_VALUE *)a, &NETSCAPE_SPKAC_it);}

voidESS_SIGNING_CERT_free(ESS_SIGNING_CERT *a){	ASN1_item_free((ASN1_VALUE *)a, &ESS_SIGNING_CERT_it);}

voidX509_ATTRIBUTE_free(X509_ATTRIBUTE *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_ATTRIBUTE_it);}

voidX509_free(X509 *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_it);}

voidPKCS12_SAFEBAG_free(PKCS12_SAFEBAG *a){	ASN1_item_free((ASN1_VALUE *)a, &PKCS12_SAFEBAG_it);}

voidPKCS12_MAC_DATA_free(PKCS12_MAC_DATA *a){	ASN1_item_free((ASN1_VALUE *)a, &PKCS12_MAC_DATA_it);}

voidPROXY_POLICY_free(PROXY_POLICY *a){	ASN1_item_free((ASN1_VALUE *)a, &PROXY_POLICY_it);}

voidEDIPARTYNAME_free(EDIPARTYNAME *a){	ASN1_item_free((ASN1_VALUE *)a, &EDIPARTYNAME_it);}

voidOTHERNAME_free(OTHERNAME *a){	ASN1_item_free((ASN1_VALUE *)a, &OTHERNAME_it);}

void ASN1_INTEGER_free(ASN1_INTEGER *a){    ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(ASN1_INTEGER));}

voidX509_EXTENSION_free(X509_EXTENSION *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_EXTENSION_it);}

voidX509_PUBKEY_free(X509_PUBKEY *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_PUBKEY_it);}

static X509_EXTENSION* openssl_new_xextension(lua_State*L, int idx, int v3){  int nid;  int critical = 0;  ASN1_OCTET_STRING* value = NULL;  X509_EXTENSION* y = NULL;  lua_getfield(L, idx, "object");  nid = openssl_get_nid(L, -1);  lua_pop(L, 1);  lua_getfield(L, idx, "critical");  critical = lua_isnil(L, -1) ? 0 : lua_toboolean(L, -1);  lua_pop(L, 1);  if (nid == NID_undef)  {    lua_pushfstring(L, "%s is not valid object id", lua_tostring(L, -1));    luaL_argerror(L, idx, lua_tostring(L, -1));  }  lua_getfield(L, idx, "value");  luaL_argcheck(L, lua_isstring(L, -1) || auxiliar_isgroup(L, "openssl.asn1group", -1),                1, "field value must be string or openssl.asn1group object");  if (lua_isstring(L, -1))  {    size_t size;    const char* data = lua_tolstring(L, -1, &size);    if (v3)    {      const X509V3_EXT_METHOD *method = X509V3_EXT_get_nid(nid);      if (method)      {        void *ext_struc = NULL;        STACK_OF(CONF_VALUE) *nval = X509V3_parse_list(data);        /* Now get internal extension representation based on type */        if (method->v2i && nval)        {          if (sk_CONF_VALUE_num(nval) > 0)          {            ext_struc = method->v2i(method, NULL, nval);          }        }        else if (method->s2i)        {          ext_struc = method->s2i(method, NULL, data);        }        if (nval)          sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);        if (ext_struc)        {          unsigned char *ext_der = NULL;          int ext_len;          /* Convert internal representation to DER */          if (method->it)          {            ext_der = NULL;            ext_len = ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));            if (ext_len < 0)            {              ext_der = NULL;            }          }          else          {            ext_len = method->i2d(ext_struc, NULL);            ext_der = OPENSSL_malloc(ext_len);            if (ext_der)            {              unsigned char* p = ext_der;              method->i2d(ext_struc, &p);            }          }          if (ext_der)          {            value = ASN1_STRING_type_new(V_ASN1_OCTET_STRING);            ASN1_STRING_set(value, ext_der, ext_len);          }          else            value = NULL;          if (method->it) ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));          else method->ext_free(ext_struc);        }      }    }    else    {      value = ASN1_STRING_type_new(V_ASN1_OCTET_STRING);      ASN1_STRING_set(value, data, size);    }    if (value)    {      y = X509_EXTENSION_create_by_NID(NULL, nid, critical, value);      ASN1_STRING_free(value);      return y;    }    else    {//.........这里部分代码省略.........

voidTS_MSG_IMPRINT_free(TS_MSG_IMPRINT *a){	ASN1_item_free((ASN1_VALUE *)a, &TS_MSG_IMPRINT_it);}

voidNETSCAPE_SPKI_free(NETSCAPE_SPKI *a){	ASN1_item_free((ASN1_VALUE *)a, &NETSCAPE_SPKI_it);}

voidPROXY_CERT_INFO_EXTENSION_free(PROXY_CERT_INFO_EXTENSION *a){	ASN1_item_free((ASN1_VALUE *)a, &PROXY_CERT_INFO_EXTENSION_it);}

voidGENERAL_NAMES_free(GENERAL_NAMES *a){	ASN1_item_free((ASN1_VALUE *)a, &GENERAL_NAMES_it);}

voidPKCS12_free(PKCS12 *a){	ASN1_item_free((ASN1_VALUE *)a, &PKCS12_it);}

voidX509_REVOKED_free(X509_REVOKED *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_REVOKED_it);}

voidPKCS12_BAGS_free(PKCS12_BAGS *a){	ASN1_item_free((ASN1_VALUE *)a, &PKCS12_BAGS_it);}

voidX509_CRL_INFO_free(X509_CRL_INFO *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_CRL_INFO_it);}

voidX509_CINF_free(X509_CINF *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_CINF_it);}

voidESS_ISSUER_SERIAL_free(ESS_ISSUER_SERIAL *a){	ASN1_item_free((ASN1_VALUE *)a, &ESS_ISSUER_SERIAL_it);}

voidBASIC_CONSTRAINTS_free(BASIC_CONSTRAINTS *a){	ASN1_item_free((ASN1_VALUE *)a, &BASIC_CONSTRAINTS_it);}

voidX509_ALGOR_free(X509_ALGOR *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_ALGOR_it);}

voidX509_CRL_free(X509_CRL *a){	ASN1_item_free((ASN1_VALUE *)a, &X509_CRL_it);}

voidESS_CERT_ID_free(ESS_CERT_ID *a){	ASN1_item_free((ASN1_VALUE *)a, &ESS_CERT_ID_it);}