aboutsummaryrefslogtreecommitdiff
path: root/src/netaddress.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/netaddress.cpp')
-rw-r--r--src/netaddress.cpp243
1 files changed, 198 insertions, 45 deletions
diff --git a/src/netaddress.cpp b/src/netaddress.cpp
index e60c2f1558..08714dc2ec 100644
--- a/src/netaddress.cpp
+++ b/src/netaddress.cpp
@@ -5,7 +5,10 @@
#include <netaddress.h>
+#include <crypto/common.h>
+#include <crypto/sha3.h>
#include <hash.h>
+#include <prevector.h>
#include <tinyformat.h>
#include <util/asmap.h>
#include <util/strencodings.h>
@@ -29,7 +32,18 @@ CNetAddr::BIP155Network CNetAddr::GetBIP155Network() const
case NET_IPV6:
return BIP155Network::IPV6;
case NET_ONION:
- return BIP155Network::TORV2;
+ switch (m_addr.size()) {
+ case ADDR_TORV2_SIZE:
+ return BIP155Network::TORV2;
+ case ADDR_TORV3_SIZE:
+ return BIP155Network::TORV3;
+ default:
+ assert(false);
+ }
+ case NET_I2P:
+ return BIP155Network::I2P;
+ case NET_CJDNS:
+ return BIP155Network::CJDNS;
case NET_INTERNAL: // should have been handled before calling this function
case NET_UNROUTABLE: // m_net is never and should not be set to NET_UNROUTABLE
case NET_MAX: // m_net is never and should not be set to NET_MAX
@@ -66,6 +80,30 @@ bool CNetAddr::SetNetFromBIP155Network(uint8_t possible_bip155_net, size_t addre
throw std::ios_base::failure(
strprintf("BIP155 TORv2 address with length %u (should be %u)", address_size,
ADDR_TORV2_SIZE));
+ case BIP155Network::TORV3:
+ if (address_size == ADDR_TORV3_SIZE) {
+ m_net = NET_ONION;
+ return true;
+ }
+ throw std::ios_base::failure(
+ strprintf("BIP155 TORv3 address with length %u (should be %u)", address_size,
+ ADDR_TORV3_SIZE));
+ case BIP155Network::I2P:
+ if (address_size == ADDR_I2P_SIZE) {
+ m_net = NET_I2P;
+ return true;
+ }
+ throw std::ios_base::failure(
+ strprintf("BIP155 I2P address with length %u (should be %u)", address_size,
+ ADDR_I2P_SIZE));
+ case BIP155Network::CJDNS:
+ if (address_size == ADDR_CJDNS_SIZE) {
+ m_net = NET_CJDNS;
+ return true;
+ }
+ throw std::ios_base::failure(
+ strprintf("BIP155 CJDNS address with length %u (should be %u)", address_size,
+ ADDR_CJDNS_SIZE));
}
// Don't throw on addresses with unknown network ids (maybe from the future).
@@ -92,7 +130,13 @@ void CNetAddr::SetIP(const CNetAddr& ipIn)
assert(ipIn.m_addr.size() == ADDR_IPV6_SIZE);
break;
case NET_ONION:
- assert(ipIn.m_addr.size() == ADDR_TORV2_SIZE);
+ assert(ipIn.m_addr.size() == ADDR_TORV2_SIZE || ipIn.m_addr.size() == ADDR_TORV3_SIZE);
+ break;
+ case NET_I2P:
+ assert(ipIn.m_addr.size() == ADDR_I2P_SIZE);
+ break;
+ case NET_CJDNS:
+ assert(ipIn.m_addr.size() == ADDR_CJDNS_SIZE);
break;
case NET_INTERNAL:
assert(ipIn.m_addr.size() == ADDR_INTERNAL_SIZE);
@@ -150,24 +194,80 @@ bool CNetAddr::SetInternal(const std::string &name)
return true;
}
+namespace torv3 {
+// https://gitweb.torproject.org/torspec.git/tree/rend-spec-v3.txt#n2135
+static constexpr size_t CHECKSUM_LEN = 2;
+static const unsigned char VERSION[] = {3};
+static constexpr size_t TOTAL_LEN = ADDR_TORV3_SIZE + CHECKSUM_LEN + sizeof(VERSION);
+
+static void Checksum(Span<const uint8_t> addr_pubkey, uint8_t (&checksum)[CHECKSUM_LEN])
+{
+ // TORv3 CHECKSUM = H(".onion checksum" | PUBKEY | VERSION)[:2]
+ static const unsigned char prefix[] = ".onion checksum";
+ static constexpr size_t prefix_len = 15;
+
+ SHA3_256 hasher;
+
+ hasher.Write(MakeSpan(prefix).first(prefix_len));
+ hasher.Write(addr_pubkey);
+ hasher.Write(VERSION);
+
+ uint8_t checksum_full[SHA3_256::OUTPUT_SIZE];
+
+ hasher.Finalize(checksum_full);
+
+ memcpy(checksum, checksum_full, sizeof(checksum));
+}
+
+}; // namespace torv3
+
/**
- * Parse a TORv2 address and set this object to it.
+ * Parse a TOR address and set this object to it.
*
* @returns Whether or not the operation was successful.
*
* @see CNetAddr::IsTor()
*/
-bool CNetAddr::SetSpecial(const std::string &strName)
+bool CNetAddr::SetSpecial(const std::string& str)
{
- if (strName.size()>6 && strName.substr(strName.size() - 6, 6) == ".onion") {
- std::vector<unsigned char> vchAddr = DecodeBase32(strName.substr(0, strName.size() - 6).c_str());
- if (vchAddr.size() != ADDR_TORV2_SIZE) {
+ static const char* suffix{".onion"};
+ static constexpr size_t suffix_len{6};
+
+ if (!ValidAsCString(str) || str.size() <= suffix_len ||
+ str.substr(str.size() - suffix_len) != suffix) {
+ return false;
+ }
+
+ bool invalid;
+ const auto& input = DecodeBase32(str.substr(0, str.size() - suffix_len).c_str(), &invalid);
+
+ if (invalid) {
+ return false;
+ }
+
+ switch (input.size()) {
+ case ADDR_TORV2_SIZE:
+ m_net = NET_ONION;
+ m_addr.assign(input.begin(), input.end());
+ return true;
+ case torv3::TOTAL_LEN: {
+ Span<const uint8_t> input_pubkey{input.data(), ADDR_TORV3_SIZE};
+ Span<const uint8_t> input_checksum{input.data() + ADDR_TORV3_SIZE, torv3::CHECKSUM_LEN};
+ Span<const uint8_t> input_version{input.data() + ADDR_TORV3_SIZE + torv3::CHECKSUM_LEN, sizeof(torv3::VERSION)};
+
+ uint8_t calculated_checksum[torv3::CHECKSUM_LEN];
+ torv3::Checksum(input_pubkey, calculated_checksum);
+
+ if (input_checksum != calculated_checksum || input_version != torv3::VERSION) {
return false;
}
+
m_net = NET_ONION;
- m_addr.assign(vchAddr.begin(), vchAddr.end());
+ m_addr.assign(input_pubkey.begin(), input_pubkey.end());
return true;
}
+ }
+
return false;
}
@@ -284,13 +384,21 @@ bool CNetAddr::IsHeNet() const
}
/**
- * @returns Whether or not this is a dummy address that maps an onion address
- * into IPv6.
- *
+ * Check whether this object represents a TOR address.
* @see CNetAddr::SetSpecial(const std::string &)
*/
bool CNetAddr::IsTor() const { return m_net == NET_ONION; }
+/**
+ * Check whether this object represents an I2P address.
+ */
+bool CNetAddr::IsI2P() const { return m_net == NET_I2P; }
+
+/**
+ * Check whether this object represents a CJDNS address.
+ */
+bool CNetAddr::IsCJDNS() const { return m_net == NET_CJDNS; }
+
bool CNetAddr::IsLocal() const
{
// IPv4 loopback (127.0.0.0/8 or 0.0.0.0/8)
@@ -377,28 +485,72 @@ enum Network CNetAddr::GetNetwork() const
return m_net;
}
+static std::string IPv6ToString(Span<const uint8_t> a)
+{
+ assert(a.size() == ADDR_IPV6_SIZE);
+ // clang-format off
+ return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
+ ReadBE16(&a[0]),
+ ReadBE16(&a[2]),
+ ReadBE16(&a[4]),
+ ReadBE16(&a[6]),
+ ReadBE16(&a[8]),
+ ReadBE16(&a[10]),
+ ReadBE16(&a[12]),
+ ReadBE16(&a[14]));
+ // clang-format on
+}
+
std::string CNetAddr::ToStringIP() const
{
- if (IsTor())
- return EncodeBase32(m_addr) + ".onion";
- if (IsInternal())
+ switch (m_net) {
+ case NET_IPV4:
+ case NET_IPV6: {
+ CService serv(*this, 0);
+ struct sockaddr_storage sockaddr;
+ socklen_t socklen = sizeof(sockaddr);
+ if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
+ char name[1025] = "";
+ if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name,
+ sizeof(name), nullptr, 0, NI_NUMERICHOST))
+ return std::string(name);
+ }
+ if (m_net == NET_IPV4) {
+ return strprintf("%u.%u.%u.%u", m_addr[0], m_addr[1], m_addr[2], m_addr[3]);
+ }
+ return IPv6ToString(m_addr);
+ }
+ case NET_ONION:
+ switch (m_addr.size()) {
+ case ADDR_TORV2_SIZE:
+ return EncodeBase32(m_addr) + ".onion";
+ case ADDR_TORV3_SIZE: {
+
+ uint8_t checksum[torv3::CHECKSUM_LEN];
+ torv3::Checksum(m_addr, checksum);
+
+ // TORv3 onion_address = base32(PUBKEY | CHECKSUM | VERSION) + ".onion"
+ prevector<torv3::TOTAL_LEN, uint8_t> address{m_addr.begin(), m_addr.end()};
+ address.insert(address.end(), checksum, checksum + torv3::CHECKSUM_LEN);
+ address.insert(address.end(), torv3::VERSION, torv3::VERSION + sizeof(torv3::VERSION));
+
+ return EncodeBase32(address) + ".onion";
+ }
+ default:
+ assert(false);
+ }
+ case NET_I2P:
+ return EncodeBase32(m_addr, false /* don't pad with = */) + ".b32.i2p";
+ case NET_CJDNS:
+ return IPv6ToString(m_addr);
+ case NET_INTERNAL:
return EncodeBase32(m_addr) + ".internal";
- CService serv(*this, 0);
- struct sockaddr_storage sockaddr;
- socklen_t socklen = sizeof(sockaddr);
- if (serv.GetSockAddr((struct sockaddr*)&sockaddr, &socklen)) {
- char name[1025] = "";
- if (!getnameinfo((const struct sockaddr*)&sockaddr, socklen, name, sizeof(name), nullptr, 0, NI_NUMERICHOST))
- return std::string(name);
- }
- if (IsIPv4())
- return strprintf("%u.%u.%u.%u", m_addr[0], m_addr[1], m_addr[2], m_addr[3]);
- assert(IsIPv6());
- return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
- m_addr[0] << 8 | m_addr[1], m_addr[2] << 8 | m_addr[3],
- m_addr[4] << 8 | m_addr[5], m_addr[6] << 8 | m_addr[7],
- m_addr[8] << 8 | m_addr[9], m_addr[10] << 8 | m_addr[11],
- m_addr[12] << 8 | m_addr[13], m_addr[14] << 8 | m_addr[15]);
+ case NET_UNROUTABLE: // m_net is never and should not be set to NET_UNROUTABLE
+ case NET_MAX: // m_net is never and should not be set to NET_MAX
+ assert(false);
+ } // no default case, so the compiler can warn about missing cases
+
+ assert(false);
}
std::string CNetAddr::ToString() const
@@ -477,21 +629,22 @@ uint32_t CNetAddr::GetLinkedIPv4() const
assert(false);
}
-uint32_t CNetAddr::GetNetClass() const {
- uint32_t net_class = NET_IPV6;
- if (IsLocal()) {
- net_class = 255;
- }
+uint32_t CNetAddr::GetNetClass() const
+{
+ // Make sure that if we return NET_IPV6, then IsIPv6() is true. The callers expect that.
+
+ // Check for "internal" first because such addresses are also !IsRoutable()
+ // and we don't want to return NET_UNROUTABLE in that case.
if (IsInternal()) {
- net_class = NET_INTERNAL;
- } else if (!IsRoutable()) {
- net_class = NET_UNROUTABLE;
- } else if (HasLinkedIPv4()) {
- net_class = NET_IPV4;
- } else if (IsTor()) {
- net_class = NET_ONION;
+ return NET_INTERNAL;
}
- return net_class;
+ if (!IsRoutable()) {
+ return NET_UNROUTABLE;
+ }
+ if (HasLinkedIPv4()) {
+ return NET_IPV4;
+ }
+ return m_net;
}
uint32_t CNetAddr::GetMappedAS(const std::vector<bool> &asmap) const {
@@ -566,7 +719,7 @@ std::vector<unsigned char> CNetAddr::GetGroup(const std::vector<bool> &asmap) co
vchRet.push_back((ipv4 >> 24) & 0xFF);
vchRet.push_back((ipv4 >> 16) & 0xFF);
return vchRet;
- } else if (IsTor()) {
+ } else if (IsTor() || IsI2P() || IsCJDNS()) {
nBits = 4;
} else if (IsHeNet()) {
// for he.net, use /36 groups
@@ -791,7 +944,7 @@ std::string CService::ToStringPort() const
std::string CService::ToStringIPPort() const
{
- if (IsIPv4() || IsTor() || IsInternal()) {
+ if (IsIPv4() || IsTor() || IsI2P() || IsInternal()) {
return ToStringIP() + ":" + ToStringPort();
} else {
return "[" + ToStringIP() + "]:" + ToStringPort();