mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-11 18:14:03 +00:00
325 lines
8.5 KiB
C++
325 lines
8.5 KiB
C++
#pragma once
|
||
|
||
#include <string.h>
|
||
|
||
#include <Poco/RegularExpression.h>
|
||
#include <Poco/Net/IPAddress.h>
|
||
#include <Poco/Net/SocketAddress.h>
|
||
#include <Poco/Net/DNS.h>
|
||
#include <Poco/Util/Application.h>
|
||
#include <Poco/Util/AbstractConfiguration.h>
|
||
|
||
#include <DB/Core/Types.h>
|
||
#include <DB/Core/Exception.h>
|
||
#include <DB/Core/ErrorCodes.h>
|
||
#include <DB/IO/ReadHelpers.h>
|
||
|
||
#include <Yandex/logger_useful.h>
|
||
|
||
|
||
namespace DB
|
||
{
|
||
|
||
|
||
/// Позволяет проверить соответствие адреса шаблону.
|
||
class IAddressPattern
|
||
{
|
||
public:
|
||
virtual bool contains(const Poco::Net::IPAddress & addr) const = 0;
|
||
virtual ~IAddressPattern() {}
|
||
|
||
static Poco::Net::IPAddress toIPv6(const Poco::Net::IPAddress addr)
|
||
{
|
||
if (addr.family() == Poco::Net::IPAddress::IPv6)
|
||
return addr;
|
||
|
||
return Poco::Net::IPAddress("::FFFF:" + addr.toString());
|
||
}
|
||
};
|
||
|
||
|
||
/// IP-адрес или маска подсети. Например, 213.180.204.3 или 10.0.0.1/8 или 2a02:6b8::3 или 2a02:6b8::3/64.
|
||
class IPAddressPattern : public IAddressPattern
|
||
{
|
||
private:
|
||
/// Адрес маски. Всегда переводится в IPv6.
|
||
Poco::Net::IPAddress mask_address;
|
||
/// Количество бит в маске.
|
||
UInt8 prefix_bits;
|
||
|
||
public:
|
||
explicit IPAddressPattern(const String & str)
|
||
{
|
||
const char * pos = strchr(str.c_str(), '/');
|
||
|
||
if (NULL == pos)
|
||
{
|
||
construct(Poco::Net::IPAddress(str));
|
||
}
|
||
else
|
||
{
|
||
String addr(str, 0, pos - str.c_str());
|
||
UInt8 prefix_bits_ = parse<UInt8>(pos + 1);
|
||
|
||
construct(Poco::Net::IPAddress(addr), prefix_bits_);
|
||
}
|
||
}
|
||
|
||
bool contains(const Poco::Net::IPAddress & addr) const
|
||
{
|
||
return prefixBitsEquals(reinterpret_cast<const char *>(toIPv6(addr).addr()), reinterpret_cast<const char *>(mask_address.addr()), prefix_bits);
|
||
}
|
||
|
||
private:
|
||
void construct(const Poco::Net::IPAddress & mask_address_)
|
||
{
|
||
mask_address = toIPv6(mask_address_);
|
||
prefix_bits = 128;
|
||
}
|
||
|
||
void construct(const Poco::Net::IPAddress & mask_address_, UInt8 prefix_bits_)
|
||
{
|
||
mask_address = toIPv6(mask_address_);
|
||
prefix_bits = mask_address_.family() == Poco::Net::IPAddress::IPv4
|
||
? prefix_bits_ + 96
|
||
: prefix_bits_;
|
||
}
|
||
|
||
static bool prefixBitsEquals(const char * lhs, const char * rhs, UInt8 prefix_bits)
|
||
{
|
||
UInt8 prefix_bytes = prefix_bits / 8;
|
||
UInt8 remaining_bits = prefix_bits % 8;
|
||
|
||
return 0 == memcmp(lhs, rhs, prefix_bytes)
|
||
&& (remaining_bits % 8 == 0
|
||
|| (lhs[prefix_bytes] >> (8 - remaining_bits)) == (rhs[prefix_bytes] >> (8 - remaining_bits)));
|
||
}
|
||
};
|
||
|
||
|
||
/// Проверяет соответствие адреса одному из адресов хоста.
|
||
class HostExactPattern : public IAddressPattern
|
||
{
|
||
private:
|
||
String host;
|
||
|
||
public:
|
||
HostExactPattern(const String & host_) : host(host_) {}
|
||
|
||
bool contains(const Poco::Net::IPAddress & addr) const
|
||
{
|
||
Poco::Net::IPAddress addr_v6 = toIPv6(addr);
|
||
|
||
/// Резолвим вручную, потому что в Poco не используется флаг AI_ALL, а он важен.
|
||
addrinfo * ai = NULL;
|
||
|
||
addrinfo hints;
|
||
memset(&hints, 0, sizeof(hints));
|
||
hints.ai_family = AF_UNSPEC;
|
||
hints.ai_flags |= AI_V4MAPPED | AI_ALL;
|
||
|
||
int ret = getaddrinfo(host.c_str(), NULL, &hints, &ai);
|
||
if (0 != ret)
|
||
throw Exception("Cannot getaddrinfo: " + std::string(gai_strerror(ret)), ErrorCodes::DNS_ERROR);
|
||
|
||
try
|
||
{
|
||
for (; ai != NULL; ai = ai->ai_next)
|
||
{
|
||
if (ai->ai_addrlen && ai->ai_addr)
|
||
{
|
||
if (ai->ai_family == AF_INET6)
|
||
{
|
||
if (addr_v6 == Poco::Net::IPAddress(
|
||
&reinterpret_cast<sockaddr_in6*>(ai->ai_addr)->sin6_addr, sizeof(in6_addr),
|
||
reinterpret_cast<sockaddr_in6*>(ai->ai_addr)->sin6_scope_id))
|
||
{
|
||
return true;
|
||
}
|
||
}
|
||
else if (ai->ai_family == AF_INET)
|
||
{
|
||
if (addr_v6 == toIPv6(Poco::Net::IPAddress(
|
||
&reinterpret_cast<sockaddr_in*>(ai->ai_addr)->sin_addr, sizeof(in_addr))))
|
||
{
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
catch (...)
|
||
{
|
||
freeaddrinfo(ai);
|
||
throw;
|
||
}
|
||
freeaddrinfo(ai);
|
||
|
||
return false;
|
||
}
|
||
};
|
||
|
||
|
||
/// Проверяет соответствие PTR-записи для адреса регекспу (и дополнительно проверяет, что PTR-запись резолвится обратно в адрес клиента).
|
||
class HostRegexpPattern : public IAddressPattern
|
||
{
|
||
private:
|
||
Poco::RegularExpression host_regexp;
|
||
|
||
public:
|
||
HostRegexpPattern(const String & host_regexp_) : host_regexp(host_regexp_) {}
|
||
|
||
bool contains(const Poco::Net::IPAddress & addr) const
|
||
{
|
||
Poco::Net::SocketAddress sock_addr(addr, 0);
|
||
|
||
/// Резолвим вручную, потому что в Poco нет такой функциональности.
|
||
char domain[1024];
|
||
int gai_errno = getnameinfo(sock_addr.addr(), sock_addr.length(), domain, sizeof(domain), NULL, 0, NI_NAMEREQD);
|
||
if (0 != gai_errno)
|
||
throw Exception("Cannot getnameinfo: " + std::string(gai_strerror(gai_errno)), ErrorCodes::DNS_ERROR);
|
||
|
||
String domain_str = domain;
|
||
Poco::RegularExpression::Match match;
|
||
|
||
if (host_regexp.match(domain_str, match) && HostExactPattern(domain_str).contains(addr))
|
||
return true;
|
||
|
||
return false;
|
||
}
|
||
};
|
||
|
||
|
||
|
||
class AddressPatterns
|
||
{
|
||
private:
|
||
typedef std::vector<SharedPtr<IAddressPattern> > Container;
|
||
Container patterns;
|
||
|
||
public:
|
||
bool contains(const Poco::Net::IPAddress & addr) const
|
||
{
|
||
for (size_t i = 0, size = patterns.size(); i < size; ++i)
|
||
{
|
||
/// если хост не резолвится, то пропустим его и попробуем другой
|
||
try
|
||
{
|
||
if (patterns[i]->contains(addr))
|
||
return true;
|
||
}
|
||
catch (const DB::Exception & e)
|
||
{
|
||
LOG_WARNING(&Logger::get("AddressPatterns"),
|
||
"Failed to check if pattern contains address " << addr.toString() << ". " << e.displayText() << ", code = " << e.code());
|
||
|
||
if (e.code() == ErrorCodes::DNS_ERROR)
|
||
{
|
||
continue;
|
||
}
|
||
else
|
||
throw;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
void addFromConfig(const String & config_elem, Poco::Util::AbstractConfiguration & config)
|
||
{
|
||
Poco::Util::AbstractConfiguration::Keys config_keys;
|
||
config.keys(config_elem, config_keys);
|
||
|
||
for (Poco::Util::AbstractConfiguration::Keys::const_iterator it = config_keys.begin(); it != config_keys.end(); ++it)
|
||
{
|
||
SharedPtr<IAddressPattern> pattern;
|
||
String value = config.getString(config_elem + "." + *it);
|
||
|
||
if (0 == it->compare(0, strlen("ip"), "ip"))
|
||
pattern = new IPAddressPattern(value);
|
||
else if (0 == it->compare(0, strlen("host_regexp"), "host_regexp"))
|
||
pattern = new HostRegexpPattern(value);
|
||
else if (0 == it->compare(0, strlen("host"), "host"))
|
||
pattern = new HostExactPattern(value);
|
||
else
|
||
throw Exception("Unknown address pattern type: " + *it, ErrorCodes::UNKNOWN_ADDRESS_PATTERN_TYPE);
|
||
|
||
patterns.push_back(pattern);
|
||
}
|
||
}
|
||
};
|
||
|
||
|
||
/** Пользователь и ACL.
|
||
*/
|
||
struct User
|
||
{
|
||
String name;
|
||
|
||
/// Требуемый пароль. Хранится в открытом виде.
|
||
String password;
|
||
|
||
String profile;
|
||
String quota;
|
||
|
||
AddressPatterns addresses;
|
||
|
||
User(const String & name_, const String & config_elem, Poco::Util::AbstractConfiguration & config)
|
||
: name(name_)
|
||
{
|
||
password = config.getString(config_elem + ".password");
|
||
profile = config.getString(config_elem + ".profile");
|
||
quota = config.getString(config_elem + ".quota");
|
||
|
||
addresses.addFromConfig(config_elem + ".networks", config);
|
||
}
|
||
|
||
/// Для вставки в контейнер.
|
||
User() {}
|
||
};
|
||
|
||
|
||
/// Известные пользователи.
|
||
class Users
|
||
{
|
||
private:
|
||
typedef std::map<String, User> Container;
|
||
Container cont;
|
||
|
||
public:
|
||
void loadFromConfig(Poco::Util::AbstractConfiguration & config)
|
||
{
|
||
cont.clear();
|
||
|
||
Poco::Util::AbstractConfiguration::Keys config_keys;
|
||
config.keys("users", config_keys);
|
||
|
||
for (Poco::Util::AbstractConfiguration::Keys::const_iterator it = config_keys.begin(); it != config_keys.end(); ++it)
|
||
cont[*it] = User(*it, "users." + *it, config);
|
||
}
|
||
|
||
const User & get(const String & name, const String & password, const Poco::Net::IPAddress & address) const
|
||
{
|
||
Container::const_iterator it = cont.find(name);
|
||
|
||
if (cont.end() == it)
|
||
throw Exception("Unknown user " + name, ErrorCodes::UNKNOWN_USER);
|
||
|
||
if (!it->second.addresses.contains(address))
|
||
throw Exception("User " + name + " is not allowed to connect from address " + address.toString(), ErrorCodes::IP_ADDRESS_NOT_ALLOWED);
|
||
|
||
if (password != it->second.password)
|
||
{
|
||
if (password.empty())
|
||
throw Exception("Password required for user " + name, ErrorCodes::REQUIRED_PASSWORD);
|
||
else
|
||
throw Exception("Wrong password for user " + name, ErrorCodes::WRONG_PASSWORD);
|
||
}
|
||
|
||
return it->second;
|
||
}
|
||
};
|
||
|
||
|
||
}
|