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/*
* (C) 2019 Nuno Goncalves <nunojpg@gmail.com>
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/internal/uri.h>
#include <botan/exceptn.h>
#include <regex>
#if defined(BOTAN_TARGET_OS_HAS_SOCKETS)
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>
#elif defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
#include <ws2tcpip.h>
#endif
#if defined(BOTAN_TARGET_OS_HAS_SOCKETS) || defined(BOTAN_TARGET_OS_HAS_WINSOCK2)
namespace {
constexpr bool isdigit(char ch)
{
return ch >= '0' && ch <= '9';
}
bool isDomain(const std::string& domain)
{
#if defined(__GLIBCXX__) && (__GLIBCXX__ < 20160726)
// GCC 4.8 does not support regex
BOTAN_UNUSED(domain);
return true;
#else
std::regex re(
R"(^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])$)");
std::cmatch m;
return std::regex_match(domain.c_str(), m, re);
#endif
}
bool isIPv4(const std::string& ip)
{
sockaddr_storage inaddr;
return !!inet_pton(AF_INET, ip.c_str(), &inaddr);
}
bool isIPv6(const std::string& ip)
{
sockaddr_storage in6addr;
return !!inet_pton(AF_INET6, ip.c_str(), &in6addr);
}
}
namespace Botan {
URI URI::fromDomain(const std::string& uri)
{
unsigned port = 0;
const auto port_pos = uri.find(':');
if(port_pos != std::string::npos)
{
for(char c : uri.substr(port_pos+1))
{
if(!isdigit(c))
{ throw Invalid_Argument("invalid"); }
port = port*10 + c - '0';
if(port > 65535)
{ throw Invalid_Argument("invalid"); }
}
}
const auto domain = uri.substr(0, port_pos);
if(isIPv4(domain))
{ throw Invalid_Argument("invalid"); }
if(!isDomain(domain))
{ throw Invalid_Argument("invalid"); }
return {Type::Domain, domain, uint16_t(port)};
}
URI URI::fromIPv4(const std::string& uri)
{
unsigned port = 0;
const auto port_pos = uri.find(':');
if(port_pos != std::string::npos)
{
for(char c : uri.substr(port_pos+1))
{
if(!isdigit(c))
{ throw Invalid_Argument("invalid"); }
port = port*10 + c - '0';
if(port > 65535)
{ throw Invalid_Argument("invalid"); }
}
}
const auto ip = uri.substr(0, port_pos);
if(!isIPv4(ip))
{ throw Invalid_Argument("invalid"); }
return { Type::IPv4, ip, uint16_t(port) };
}
URI URI::fromIPv6(const std::string& uri)
{
unsigned port = 0;
const auto port_pos = uri.find(']');
const bool with_braces = (port_pos != std::string::npos);
if((uri[0]=='[') != with_braces)
{ throw Invalid_Argument("invalid"); }
if(with_braces && (uri.size() > port_pos + 1))
{
if(uri[port_pos+1]!=':')
{ throw Invalid_Argument("invalid"); }
for(char c : uri.substr(port_pos+2))
{
if(!isdigit(c))
{ throw Invalid_Argument("invalid"); }
port = port*10 + c - '0';
if(port > 65535)
{ throw Invalid_Argument("invalid"); }
}
}
const auto ip = uri.substr((with_braces ? 1 : 0), port_pos - with_braces);
if(!isIPv6(ip))
{ throw Invalid_Argument("invalid"); }
return { Type::IPv6, ip, uint16_t(port) };
}
URI URI::fromAny(const std::string& uri)
{
bool colon_seen=false;
bool non_number=false;
if(uri[0]=='[')
{ return fromIPv6(uri); }
for(auto c : uri)
{
if(c == ':')
{
if(colon_seen) //seen two ':'
{ return fromIPv6(uri); }
colon_seen = true;
}
else if(!isdigit(c) && c != '.')
{
non_number=true;
}
}
if(!non_number)
{
if(isIPv4(uri.substr(0, uri.find(':'))))
{
return fromIPv4(uri);
}
}
return fromDomain(uri);
}
std::string URI::to_string() const
{
if(type == Type::NotSet)
{
throw Invalid_Argument("not set");
}
if(port != 0)
{
if(type == Type::IPv6)
{ return "[" + host + "]:" + std::to_string(port); }
return host + ":" + std::to_string(port);
}
return host;
}
}
#else
namespace Botan {
URI URI::fromDomain(const std::string&) {throw Not_Implemented("No socket support enabled in build");}
URI URI::fromIPv4(const std::string&) {throw Not_Implemented("No socket support enabled in build");}
URI URI::fromIPv6(const std::string&) {throw Not_Implemented("No socket support enabled in build");}
URI URI::fromAny(const std::string&) {throw Not_Implemented("No socket support enabled in build");}
}
#endif
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