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#pragma once
#include "clickhouse_config.h"
#include <memory>
#include <string>
#include <Columns/ColumnMap.h>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnString.h>
#include <DataTypes/DataTypeMap.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <Functions/FunctionFactory.h>
#include <Functions/FunctionHelpers.h>
#include <Functions/IFunction.h>
#include <Interpreters/Context.h>
#include <base/scope_guard.h>
#if USE_SSL
#include <openssl/x509v3.h>
#include "Poco/Net/SSLManager.h"
#include "Poco/Crypto/X509Certificate.h"
#endif
namespace DB
{
namespace ErrorCodes
{
extern const int SUPPORT_IS_DISABLED;
}
// showCertificate()
class FunctionShowCertificate : public IFunction
{
public:
static constexpr auto name = "showCertificate";
static FunctionPtr create(ContextPtr ctx)
{
#if !defined(USE_SSL) || USE_SSL == 0
throw Exception(ErrorCodes::SUPPORT_IS_DISABLED, "SSL support is disabled");
#endif
return std::make_shared<FunctionShowCertificate>(ctx->getQueryContext()->getClientInfo().certificate);
}
std::string certificate;
explicit FunctionShowCertificate(const std::string & certificate_ = "") : certificate(certificate_) {}
String getName() const override { return name; }
size_t getNumberOfArguments() const override { return 0; }
bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo &) const override { return true; }
DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName &) const override
{
return std::make_shared<DataTypeMap>(std::make_shared<DataTypeString>(), std::make_shared<DataTypeString>());
}
ColumnPtr executeImpl(const ColumnsWithTypeAndName &, const DataTypePtr &, size_t input_rows_count) const override
{
MutableColumnPtr keys = DataTypeString().createColumn();
MutableColumnPtr values = DataTypeString().createColumn();
MutableColumnPtr offsets = DataTypeNumber<IColumn::Offset>().createColumn();
if (input_rows_count)
{
#if USE_SSL
std::unique_ptr<Poco::Crypto::X509Certificate> x509_cert;
if (!certificate.empty())
x509_cert = std::make_unique<Poco::Crypto::X509Certificate>(certificate);
const X509 * cert = x509_cert ?
x509_cert->certificate() :
SSL_CTX_get0_certificate(Poco::Net::SSLManager::instance().defaultServerContext()->sslContext());
if (cert)
{
BIO * b = BIO_new(BIO_s_mem());
SCOPE_EXIT(
{
BIO_free(b);
});
keys->insert("version");
values->insert(std::to_string(X509_get_version(cert) + 1));
{
char buf[1024] = {0};
const ASN1_INTEGER * sn = X509_get0_serialNumber(cert);
BIGNUM * bnsn = ASN1_INTEGER_to_BN(sn, nullptr);
SCOPE_EXIT(
{
BN_free(bnsn);
});
if (BN_print(b, bnsn) > 0 && BIO_read(b, buf, sizeof(buf)) > 0)
{
keys->insert("serial_number");
values->insert(buf);
}
}
{
const ASN1_BIT_STRING *sig = nullptr;
const X509_ALGOR *al = nullptr;
char buf[1024] = {0};
X509_get0_signature(&sig, &al, cert);
if (al)
{
OBJ_obj2txt(buf, sizeof(buf), al->algorithm, 0);
keys->insert("signature_algo");
values->insert(buf);
}
}
char * issuer = X509_NAME_oneline(X509_get_issuer_name(cert), nullptr, 0);
if (issuer)
{
SCOPE_EXIT(
{
OPENSSL_free(issuer);
});
keys->insert("issuer");
values->insert(issuer);
}
{
char buf[1024] = {0};
if (ASN1_TIME_print(b, X509_get_notBefore(cert)) && BIO_read(b, buf, sizeof(buf)) > 0)
{
keys->insert("not_before");
values->insert(buf);
}
}
{
char buf[1024] = {0};
if (ASN1_TIME_print(b, X509_get_notAfter(cert)) && BIO_read(b, buf, sizeof(buf)) > 0)
{
keys->insert("not_after");
values->insert(buf);
}
}
char * subject = X509_NAME_oneline(X509_get_subject_name(cert), nullptr, 0);
if (subject)
{
SCOPE_EXIT(
{
OPENSSL_free(subject);
});
keys->insert("subject");
values->insert(subject);
}
if (X509_PUBKEY * pkey = X509_get_X509_PUBKEY(cert))
{
char buf[1024] = {0};
ASN1_OBJECT *ppkalg = nullptr;
const unsigned char *pk = nullptr;
int ppklen = 0;
X509_ALGOR *pa = nullptr;
if (X509_PUBKEY_get0_param(&ppkalg, &pk, &ppklen, &pa, pkey) &&
i2a_ASN1_OBJECT(b, ppkalg) > 0 && BIO_read(b, buf, sizeof(buf)) > 0)
{
keys->insert("pkey_algo");
values->insert(buf);
}
}
}
offsets->insert(keys->size());
#endif
}
size_t sz = keys->size();
if (sz && input_rows_count > 1)
{
keys->reserve(sz * input_rows_count);
values->reserve(sz * input_rows_count);
offsets->reserve(input_rows_count);
}
for (size_t i = 1; i < input_rows_count; ++i)
{
for (size_t j = 0; j < sz; ++j)
{
keys->insertFrom(*keys, j);
values->insertFrom(*values, j);
}
offsets->insert(keys->size());
}
auto nested_column = ColumnArray::create(
ColumnTuple::create(Columns{std::move(keys), std::move(values)}), std::move(offsets));
return ColumnMap::create(nested_column);
}
};
}
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