mirror of
https://github.com/superseriousbusiness/gotosocial
synced 2024-11-23 21:03:19 +00:00
e6cd81babc
* [bugfix]: Fix IPv6 validation The current code considers ff00::/8 valid, but contrary to the comment that's not the global unicast range. ff-prefixes in IPv6 denote multicast. This adapts the code to take the same approach as IPv4, explicitly blacklisting reserved internal/private ranges. * [chore] Add missing 4 in IPv4Reserved doc comment
90 lines
3 KiB
Go
90 lines
3 KiB
Go
/*
|
|
GoToSocial
|
|
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Affero General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Affero General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Affero General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package netutil
|
|
|
|
import (
|
|
"net/netip"
|
|
)
|
|
|
|
var (
|
|
// IPv6Reserved contains IPv6 reserved IP prefixes.
|
|
IPv6Reserved = [...]netip.Prefix{
|
|
netip.MustParsePrefix("::1/128"), // Loopback
|
|
netip.MustParsePrefix("fe80::/10"), // Link-local
|
|
netip.MustParsePrefix("fc00::/7"), // Unique Local
|
|
netip.MustParsePrefix("2001:db8::/32"), // Test, doc, examples
|
|
netip.MustParsePrefix("ff00::/8"), // Multicast
|
|
netip.MustParsePrefix("fec0::/10"), // Site-local, deprecated
|
|
}
|
|
|
|
// IPv4Reserved contains IPv4 reserved IP prefixes.
|
|
IPv4Reserved = [...]netip.Prefix{
|
|
netip.MustParsePrefix("0.0.0.0/8"), // Current network
|
|
netip.MustParsePrefix("10.0.0.0/8"), // Private
|
|
netip.MustParsePrefix("100.64.0.0/10"), // RFC6598
|
|
netip.MustParsePrefix("127.0.0.0/8"), // Loopback
|
|
netip.MustParsePrefix("169.254.0.0/16"), // Link-local
|
|
netip.MustParsePrefix("172.16.0.0/12"), // Private
|
|
netip.MustParsePrefix("192.0.0.0/24"), // RFC6890
|
|
netip.MustParsePrefix("192.0.2.0/24"), // Test, doc, examples
|
|
netip.MustParsePrefix("192.88.99.0/24"), // IPv6 to IPv4 relay
|
|
netip.MustParsePrefix("192.168.0.0/16"), // Private
|
|
netip.MustParsePrefix("198.18.0.0/15"), // Benchmarking tests
|
|
netip.MustParsePrefix("198.51.100.0/24"), // Test, doc, examples
|
|
netip.MustParsePrefix("203.0.113.0/24"), // Test, doc, examples
|
|
netip.MustParsePrefix("224.0.0.0/4"), // Multicast
|
|
netip.MustParsePrefix("240.0.0.0/4"), // Reserved (includes broadcast / 255.255.255.255)
|
|
}
|
|
)
|
|
|
|
// ValidateAddr will parse a netip.AddrPort from string, and return the result of ValidateIP() on addr.
|
|
func ValidateAddr(s string) bool {
|
|
ipport, err := netip.ParseAddrPort(s)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return ValidateIP(ipport.Addr())
|
|
}
|
|
|
|
// ValidateIP returns whether IP is an IPv4/6 address in non-reserved, public ranges.
|
|
func ValidateIP(ip netip.Addr) bool {
|
|
switch {
|
|
// IPv4: check if IPv4 in reserved nets
|
|
case ip.Is4():
|
|
for _, reserved := range IPv4Reserved {
|
|
if reserved.Contains(ip) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
|
|
// IPv6: check if IP in IPv6 reserved nets
|
|
case ip.Is6():
|
|
for _, reserved := range IPv6Reserved {
|
|
if reserved.Contains(ip) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
|
|
// Assume malicious by default
|
|
default:
|
|
return false
|
|
}
|
|
}
|