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-rw-r--r--src/crypto/common.h7
-rw-r--r--src/netaddress.cpp306
-rw-r--r--src/netaddress.h169
-rw-r--r--src/primitives/transaction.h6
-rw-r--r--src/test/base32_tests.cpp3
-rw-r--r--src/test/miner_tests.cpp11
-rw-r--r--src/test/net_tests.cpp298
-rw-r--r--src/test/util/setup_common.h16
-rw-r--r--src/util/strencodings.cpp12
-rw-r--r--src/util/strencodings.h16
-rw-r--r--src/util/string.h13
-rw-r--r--src/version.h3
12 files changed, 783 insertions, 77 deletions
diff --git a/src/crypto/common.h b/src/crypto/common.h
index 5b4932c992..c1acf8b22e 100644
--- a/src/crypto/common.h
+++ b/src/crypto/common.h
@@ -53,6 +53,13 @@ void static inline WriteLE64(unsigned char* ptr, uint64_t x)
memcpy(ptr, (char*)&v, 8);
}
+uint16_t static inline ReadBE16(const unsigned char* ptr)
+{
+ uint16_t x;
+ memcpy((char*)&x, ptr, 2);
+ return be16toh(x);
+}
+
uint32_t static inline ReadBE32(const unsigned char* ptr)
{
uint32_t x;
diff --git a/src/netaddress.cpp b/src/netaddress.cpp
index b50cf74069..08714dc2ec 100644
--- a/src/netaddress.cpp
+++ b/src/netaddress.cpp
@@ -5,18 +5,112 @@
#include <netaddress.h>
+#include <crypto/common.h>
+#include <crypto/sha3.h>
#include <hash.h>
+#include <prevector.h>
#include <tinyformat.h>
-#include <util/strencodings.h>
#include <util/asmap.h>
+#include <util/strencodings.h>
+#include <util/string.h>
#include <algorithm>
#include <array>
#include <cstdint>
+#include <ios>
#include <iterator>
#include <tuple>
constexpr size_t CNetAddr::V1_SERIALIZATION_SIZE;
+constexpr size_t CNetAddr::MAX_ADDRV2_SIZE;
+
+CNetAddr::BIP155Network CNetAddr::GetBIP155Network() const
+{
+ switch (m_net) {
+ case NET_IPV4:
+ return BIP155Network::IPV4;
+ case NET_IPV6:
+ return BIP155Network::IPV6;
+ case NET_ONION:
+ 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
+ assert(false);
+ } // no default case, so the compiler can warn about missing cases
+
+ assert(false);
+}
+
+bool CNetAddr::SetNetFromBIP155Network(uint8_t possible_bip155_net, size_t address_size)
+{
+ switch (possible_bip155_net) {
+ case BIP155Network::IPV4:
+ if (address_size == ADDR_IPV4_SIZE) {
+ m_net = NET_IPV4;
+ return true;
+ }
+ throw std::ios_base::failure(
+ strprintf("BIP155 IPv4 address with length %u (should be %u)", address_size,
+ ADDR_IPV4_SIZE));
+ case BIP155Network::IPV6:
+ if (address_size == ADDR_IPV6_SIZE) {
+ m_net = NET_IPV6;
+ return true;
+ }
+ throw std::ios_base::failure(
+ strprintf("BIP155 IPv6 address with length %u (should be %u)", address_size,
+ ADDR_IPV6_SIZE));
+ case BIP155Network::TORV2:
+ if (address_size == ADDR_TORV2_SIZE) {
+ m_net = NET_ONION;
+ return true;
+ }
+ 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).
+ // Instead silently drop them and have the unserialization code consume
+ // subsequent ones which may be known to us.
+ return false;
+}
/**
* Construct an unspecified IPv6 network address (::/128).
@@ -36,7 +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);
@@ -50,13 +150,6 @@ void CNetAddr::SetIP(const CNetAddr& ipIn)
m_addr = ipIn.m_addr;
}
-template <typename T1, size_t PREFIX_LEN>
-inline bool HasPrefix(const T1& obj, const std::array<uint8_t, PREFIX_LEN>& prefix)
-{
- return obj.size() >= PREFIX_LEN &&
- std::equal(std::begin(prefix), std::end(prefix), std::begin(obj));
-}
-
void CNetAddr::SetLegacyIPv6(Span<const uint8_t> ipv6)
{
assert(ipv6.size() == ADDR_IPV6_SIZE);
@@ -101,24 +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;
}
@@ -235,13 +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)
@@ -328,28 +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
@@ -428,21 +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 {
@@ -517,7 +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
@@ -742,7 +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();
diff --git a/src/netaddress.h b/src/netaddress.h
index d00f5a6f55..59f1b87ad3 100644
--- a/src/netaddress.h
+++ b/src/netaddress.h
@@ -13,13 +13,25 @@
#include <compat.h>
#include <prevector.h>
#include <serialize.h>
+#include <tinyformat.h>
+#include <util/strencodings.h>
+#include <util/string.h>
#include <array>
#include <cstdint>
+#include <ios>
#include <string>
#include <vector>
/**
+ * A flag that is ORed into the protocol version to designate that addresses
+ * should be serialized in (unserialized from) v2 format (BIP155).
+ * Make sure that this does not collide with any of the values in `version.h`
+ * or with `SERIALIZE_TRANSACTION_NO_WITNESS`.
+ */
+static const int ADDRV2_FORMAT = 0x20000000;
+
+/**
* A network type.
* @note An address may belong to more than one network, for example `10.0.0.1`
* belongs to both `NET_UNROUTABLE` and `NET_IPV4`.
@@ -39,9 +51,15 @@ enum Network
/// IPv6
NET_IPV6,
- /// TORv2
+ /// TOR (v2 or v3)
NET_ONION,
+ /// I2P
+ NET_I2P,
+
+ /// CJDNS
+ NET_CJDNS,
+
/// A set of addresses that represent the hash of a string or FQDN. We use
/// them in CAddrMan to keep track of which DNS seeds were used.
NET_INTERNAL,
@@ -82,6 +100,16 @@ static constexpr size_t ADDR_IPV6_SIZE = 16;
/// Size of TORv2 address (in bytes).
static constexpr size_t ADDR_TORV2_SIZE = 10;
+/// Size of TORv3 address (in bytes). This is the length of just the address
+/// as used in BIP155, without the checksum and the version byte.
+static constexpr size_t ADDR_TORV3_SIZE = 32;
+
+/// Size of I2P address (in bytes).
+static constexpr size_t ADDR_I2P_SIZE = 32;
+
+/// Size of CJDNS address (in bytes).
+static constexpr size_t ADDR_CJDNS_SIZE = 16;
+
/// Size of "internal" (NET_INTERNAL) address (in bytes).
static constexpr size_t ADDR_INTERNAL_SIZE = 10;
@@ -139,6 +167,8 @@ class CNetAddr
bool IsRFC6145() const; // IPv6 IPv4-translated address (::FFFF:0:0:0/96) (actually defined in RFC2765)
bool IsHeNet() const; // IPv6 Hurricane Electric - https://he.net (2001:0470::/36)
bool IsTor() const;
+ bool IsI2P() const;
+ bool IsCJDNS() const;
bool IsLocal() const;
bool IsRoutable() const;
bool IsInternal() const;
@@ -177,7 +207,11 @@ class CNetAddr
template <typename Stream>
void Serialize(Stream& s) const
{
- SerializeV1Stream(s);
+ if (s.GetVersion() & ADDRV2_FORMAT) {
+ SerializeV2Stream(s);
+ } else {
+ SerializeV1Stream(s);
+ }
}
/**
@@ -186,20 +220,58 @@ class CNetAddr
template <typename Stream>
void Unserialize(Stream& s)
{
- UnserializeV1Stream(s);
+ if (s.GetVersion() & ADDRV2_FORMAT) {
+ UnserializeV2Stream(s);
+ } else {
+ UnserializeV1Stream(s);
+ }
}
friend class CSubNet;
private:
/**
+ * BIP155 network ids recognized by this software.
+ */
+ enum BIP155Network : uint8_t {
+ IPV4 = 1,
+ IPV6 = 2,
+ TORV2 = 3,
+ TORV3 = 4,
+ I2P = 5,
+ CJDNS = 6,
+ };
+
+ /**
* Size of CNetAddr when serialized as ADDRv1 (pre-BIP155) (in bytes).
*/
static constexpr size_t V1_SERIALIZATION_SIZE = ADDR_IPV6_SIZE;
/**
+ * Maximum size of an address as defined in BIP155 (in bytes).
+ * This is only the size of the address, not the entire CNetAddr object
+ * when serialized.
+ */
+ static constexpr size_t MAX_ADDRV2_SIZE = 512;
+
+ /**
+ * Get the BIP155 network id of this address.
+ * Must not be called for IsInternal() objects.
+ * @returns BIP155 network id
+ */
+ BIP155Network GetBIP155Network() const;
+
+ /**
+ * Set `m_net` from the provided BIP155 network id and size after validation.
+ * @retval true the network was recognized, is valid and `m_net` was set
+ * @retval false not recognised (from future?) and should be silently ignored
+ * @throws std::ios_base::failure if the network is one of the BIP155 founding
+ * networks (id 1..6) with wrong address size.
+ */
+ bool SetNetFromBIP155Network(uint8_t possible_bip155_net, size_t address_size);
+
+ /**
* Serialize in pre-ADDRv2/BIP155 format to an array.
- * Some addresses (e.g. TORv3) cannot be serialized in pre-BIP155 format.
*/
void SerializeV1Array(uint8_t (&arr)[V1_SERIALIZATION_SIZE]) const
{
@@ -217,6 +289,9 @@ class CNetAddr
memcpy(arr + prefix_size, m_addr.data(), m_addr.size());
return;
case NET_ONION:
+ if (m_addr.size() == ADDR_TORV3_SIZE) {
+ break;
+ }
prefix_size = sizeof(TORV2_IN_IPV6_PREFIX);
assert(prefix_size + m_addr.size() == sizeof(arr));
memcpy(arr, TORV2_IN_IPV6_PREFIX.data(), prefix_size);
@@ -228,17 +303,21 @@ class CNetAddr
memcpy(arr, INTERNAL_IN_IPV6_PREFIX.data(), prefix_size);
memcpy(arr + prefix_size, m_addr.data(), m_addr.size());
return;
+ case NET_I2P:
+ break;
+ case NET_CJDNS:
+ break;
case NET_UNROUTABLE:
case NET_MAX:
assert(false);
} // no default case, so the compiler can warn about missing cases
- assert(false);
+ // Serialize TORv3, I2P and CJDNS as all-zeros.
+ memset(arr, 0x0, V1_SERIALIZATION_SIZE);
}
/**
* Serialize in pre-ADDRv2/BIP155 format to a stream.
- * Some addresses (e.g. TORv3) cannot be serialized in pre-BIP155 format.
*/
template <typename Stream>
void SerializeV1Stream(Stream& s) const
@@ -251,6 +330,25 @@ class CNetAddr
}
/**
+ * Serialize as ADDRv2 / BIP155.
+ */
+ template <typename Stream>
+ void SerializeV2Stream(Stream& s) const
+ {
+ if (IsInternal()) {
+ // Serialize NET_INTERNAL as embedded in IPv6. We need to
+ // serialize such addresses from addrman.
+ s << static_cast<uint8_t>(BIP155Network::IPV6);
+ s << COMPACTSIZE(ADDR_IPV6_SIZE);
+ SerializeV1Stream(s);
+ return;
+ }
+
+ s << static_cast<uint8_t>(GetBIP155Network());
+ s << m_addr;
+ }
+
+ /**
* Unserialize from a pre-ADDRv2/BIP155 format from an array.
*/
void UnserializeV1Array(uint8_t (&arr)[V1_SERIALIZATION_SIZE])
@@ -272,6 +370,65 @@ class CNetAddr
UnserializeV1Array(serialized);
}
+
+ /**
+ * Unserialize from a ADDRv2 / BIP155 format.
+ */
+ template <typename Stream>
+ void UnserializeV2Stream(Stream& s)
+ {
+ uint8_t bip155_net;
+ s >> bip155_net;
+
+ size_t address_size;
+ s >> COMPACTSIZE(address_size);
+
+ if (address_size > MAX_ADDRV2_SIZE) {
+ throw std::ios_base::failure(strprintf(
+ "Address too long: %u > %u", address_size, MAX_ADDRV2_SIZE));
+ }
+
+ scopeId = 0;
+
+ if (SetNetFromBIP155Network(bip155_net, address_size)) {
+ m_addr.resize(address_size);
+ s >> MakeSpan(m_addr);
+
+ if (m_net != NET_IPV6) {
+ return;
+ }
+
+ // Do some special checks on IPv6 addresses.
+
+ // Recognize NET_INTERNAL embedded in IPv6, such addresses are not
+ // gossiped but could be coming from addrman, when unserializing from
+ // disk.
+ if (HasPrefix(m_addr, INTERNAL_IN_IPV6_PREFIX)) {
+ m_net = NET_INTERNAL;
+ memmove(m_addr.data(), m_addr.data() + INTERNAL_IN_IPV6_PREFIX.size(),
+ ADDR_INTERNAL_SIZE);
+ m_addr.resize(ADDR_INTERNAL_SIZE);
+ return;
+ }
+
+ if (!HasPrefix(m_addr, IPV4_IN_IPV6_PREFIX) &&
+ !HasPrefix(m_addr, TORV2_IN_IPV6_PREFIX)) {
+ return;
+ }
+
+ // IPv4 and TORv2 are not supposed to be embedded in IPv6 (like in V1
+ // encoding). Unserialize as !IsValid(), thus ignoring them.
+ } else {
+ // If we receive an unknown BIP155 network id (from the future?) then
+ // ignore the address - unserialize as !IsValid().
+ s.ignore(address_size);
+ }
+
+ // Mimic a default-constructed CNetAddr object which is !IsValid() and thus
+ // will not be gossiped, but continue reading next addresses from the stream.
+ m_net = NET_IPV6;
+ m_addr.assign(ADDR_IPV6_SIZE, 0x0);
+ }
};
class CSubNet
diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
index 544bab6d9b..77cb1781a4 100644
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -14,6 +14,12 @@
#include <tuple>
+/**
+ * A flag that is ORed into the protocol version to designate that a transaction
+ * should be (un)serialized without witness data.
+ * Make sure that this does not collide with any of the values in `version.h`
+ * or with `ADDRV2_FORMAT`.
+ */
static const int SERIALIZE_TRANSACTION_NO_WITNESS = 0x40000000;
/** An outpoint - a combination of a transaction hash and an index n into its vout */
diff --git a/src/test/base32_tests.cpp b/src/test/base32_tests.cpp
index eedab30576..d519eca859 100644
--- a/src/test/base32_tests.cpp
+++ b/src/test/base32_tests.cpp
@@ -13,10 +13,13 @@ BOOST_AUTO_TEST_CASE(base32_testvectors)
{
static const std::string vstrIn[] = {"","f","fo","foo","foob","fooba","foobar"};
static const std::string vstrOut[] = {"","my======","mzxq====","mzxw6===","mzxw6yq=","mzxw6ytb","mzxw6ytboi======"};
+ static const std::string vstrOutNoPadding[] = {"","my","mzxq","mzxw6","mzxw6yq","mzxw6ytb","mzxw6ytboi"};
for (unsigned int i=0; i<sizeof(vstrIn)/sizeof(vstrIn[0]); i++)
{
std::string strEnc = EncodeBase32(vstrIn[i]);
BOOST_CHECK_EQUAL(strEnc, vstrOut[i]);
+ strEnc = EncodeBase32(vstrIn[i], false);
+ BOOST_CHECK_EQUAL(strEnc, vstrOutNoPadding[i]);
std::string strDec = DecodeBase32(vstrOut[i]);
BOOST_CHECK_EQUAL(strDec, vstrIn[i]);
}
diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
index 62a0dc4241..8686012af7 100644
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -36,17 +36,6 @@ struct MinerTestingSetup : public TestingSetup {
BOOST_FIXTURE_TEST_SUITE(miner_tests, MinerTestingSetup)
-// BOOST_CHECK_EXCEPTION predicates to check the specific validation error
-class HasReason {
-public:
- explicit HasReason(const std::string& reason) : m_reason(reason) {}
- bool operator() (const std::runtime_error& e) const {
- return std::string(e.what()).find(m_reason) != std::string::npos;
- };
-private:
- const std::string m_reason;
-};
-
static CFeeRate blockMinFeeRate = CFeeRate(DEFAULT_BLOCK_MIN_TX_FEE);
BlockAssembler MinerTestingSetup::AssemblerForTest(const CChainParams& params)
diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp
index 85ebc89673..261396cd0c 100644
--- a/src/test/net_tests.cpp
+++ b/src/test/net_tests.cpp
@@ -10,6 +10,7 @@
#include <net.h>
#include <netbase.h>
#include <serialize.h>
+#include <span.h>
#include <streams.h>
#include <test/util/setup_common.h>
#include <util/memory.h>
@@ -20,6 +21,7 @@
#include <boost/test/unit_test.hpp>
+#include <ios>
#include <memory>
#include <string>
@@ -245,13 +247,38 @@ BOOST_AUTO_TEST_CASE(cnetaddr_basic)
BOOST_CHECK_EQUAL(addr.ToString(), "1122:3344:5566:7788:9900:aabb:ccdd:eeff");
// TORv2
- addr.SetSpecial("6hzph5hv6337r6p2.onion");
+ BOOST_REQUIRE(addr.SetSpecial("6hzph5hv6337r6p2.onion"));
BOOST_REQUIRE(addr.IsValid());
BOOST_REQUIRE(addr.IsTor());
BOOST_CHECK(!addr.IsBindAny());
BOOST_CHECK_EQUAL(addr.ToString(), "6hzph5hv6337r6p2.onion");
+ // TORv3
+ const char* torv3_addr = "pg6mmjiyjmcrsslvykfwnntlaru7p5svn6y2ymmju6nubxndf4pscryd.onion";
+ BOOST_REQUIRE(addr.SetSpecial(torv3_addr));
+ BOOST_REQUIRE(addr.IsValid());
+ BOOST_REQUIRE(addr.IsTor());
+
+ BOOST_CHECK(!addr.IsBindAny());
+ BOOST_CHECK_EQUAL(addr.ToString(), torv3_addr);
+
+ // TORv3, broken, with wrong checksum
+ BOOST_CHECK(!addr.SetSpecial("pg6mmjiyjmcrsslvykfwnntlaru7p5svn6y2ymmju6nubxndf4pscsad.onion"));
+
+ // TORv3, broken, with wrong version
+ BOOST_CHECK(!addr.SetSpecial("pg6mmjiyjmcrsslvykfwnntlaru7p5svn6y2ymmju6nubxndf4pscrye.onion"));
+
+ // TORv3, malicious
+ BOOST_CHECK(!addr.SetSpecial(std::string{
+ "pg6mmjiyjmcrsslvykfwnntlaru7p5svn6y2ymmju6nubxndf4pscryd\0wtf.onion", 66}));
+
+ // TOR, bogus length
+ BOOST_CHECK(!addr.SetSpecial(std::string{"mfrggzak.onion"}));
+
+ // TOR, invalid base32
+ BOOST_CHECK(!addr.SetSpecial(std::string{"mf*g zak.onion"}));
+
// Internal
addr.SetInternal("esffpp");
BOOST_REQUIRE(!addr.IsValid()); // "internal" is considered invalid
@@ -259,19 +286,286 @@ BOOST_AUTO_TEST_CASE(cnetaddr_basic)
BOOST_CHECK(!addr.IsBindAny());
BOOST_CHECK_EQUAL(addr.ToString(), "esffpvrt3wpeaygy.internal");
+
+ // Totally bogus
+ BOOST_CHECK(!addr.SetSpecial("totally bogus"));
}
-BOOST_AUTO_TEST_CASE(cnetaddr_serialize)
+BOOST_AUTO_TEST_CASE(cnetaddr_serialize_v1)
{
CNetAddr addr;
CDataStream s(SER_NETWORK, PROTOCOL_VERSION);
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "00000000000000000000000000000000");
+ s.clear();
+
+ BOOST_REQUIRE(LookupHost("1.2.3.4", addr, false));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "00000000000000000000ffff01020304");
+ s.clear();
+
+ BOOST_REQUIRE(LookupHost("1a1b:2a2b:3a3b:4a4b:5a5b:6a6b:7a7b:8a8b", addr, false));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "1a1b2a2b3a3b4a4b5a5b6a6b7a7b8a8b");
+ s.clear();
+
+ BOOST_REQUIRE(addr.SetSpecial("6hzph5hv6337r6p2.onion"));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "fd87d87eeb43f1f2f3f4f5f6f7f8f9fa");
+ s.clear();
+
+ BOOST_REQUIRE(addr.SetSpecial("pg6mmjiyjmcrsslvykfwnntlaru7p5svn6y2ymmju6nubxndf4pscryd.onion"));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "00000000000000000000000000000000");
+ s.clear();
+
addr.SetInternal("a");
s << addr;
BOOST_CHECK_EQUAL(HexStr(s), "fd6b88c08724ca978112ca1bbdcafac2");
s.clear();
}
+BOOST_AUTO_TEST_CASE(cnetaddr_serialize_v2)
+{
+ CNetAddr addr;
+ CDataStream s(SER_NETWORK, PROTOCOL_VERSION);
+ // Add ADDRV2_FORMAT to the version so that the CNetAddr
+ // serialize method produces an address in v2 format.
+ s.SetVersion(s.GetVersion() | ADDRV2_FORMAT);
+
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "021000000000000000000000000000000000");
+ s.clear();
+
+ BOOST_REQUIRE(LookupHost("1.2.3.4", addr, false));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "010401020304");
+ s.clear();
+
+ BOOST_REQUIRE(LookupHost("1a1b:2a2b:3a3b:4a4b:5a5b:6a6b:7a7b:8a8b", addr, false));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "02101a1b2a2b3a3b4a4b5a5b6a6b7a7b8a8b");
+ s.clear();
+
+ BOOST_REQUIRE(addr.SetSpecial("6hzph5hv6337r6p2.onion"));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "030af1f2f3f4f5f6f7f8f9fa");
+ s.clear();
+
+ BOOST_REQUIRE(addr.SetSpecial("kpgvmscirrdqpekbqjsvw5teanhatztpp2gl6eee4zkowvwfxwenqaid.onion"));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "042053cd5648488c4707914182655b7664034e09e66f7e8cbf1084e654eb56c5bd88");
+ s.clear();
+
+ BOOST_REQUIRE(addr.SetInternal("a"));
+ s << addr;
+ BOOST_CHECK_EQUAL(HexStr(s), "0210fd6b88c08724ca978112ca1bbdcafac2");
+ s.clear();
+}
+
+BOOST_AUTO_TEST_CASE(cnetaddr_unserialize_v2)
+{
+ CNetAddr addr;
+ CDataStream s(SER_NETWORK, PROTOCOL_VERSION);
+ // Add ADDRV2_FORMAT to the version so that the CNetAddr
+ // unserialize method expects an address in v2 format.
+ s.SetVersion(s.GetVersion() | ADDRV2_FORMAT);
+
+ // Valid IPv4.
+ s << MakeSpan(ParseHex("01" // network type (IPv4)
+ "04" // address length
+ "01020304")); // address
+ s >> addr;
+ BOOST_CHECK(addr.IsValid());
+ BOOST_CHECK(addr.IsIPv4());
+ BOOST_CHECK_EQUAL(addr.ToString(), "1.2.3.4");
+ BOOST_REQUIRE(s.empty());
+
+ // Invalid IPv4, valid length but address itself is shorter.
+ s << MakeSpan(ParseHex("01" // network type (IPv4)
+ "04" // address length
+ "0102")); // address
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure, HasReason("end of data"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Invalid IPv4, with bogus length.
+ s << MakeSpan(ParseHex("01" // network type (IPv4)
+ "05" // address length
+ "01020304")); // address
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure,
+ HasReason("BIP155 IPv4 address with length 5 (should be 4)"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Invalid IPv4, with extreme length.
+ s << MakeSpan(ParseHex("01" // network type (IPv4)
+ "fd0102" // address length (513 as CompactSize)
+ "01020304")); // address
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure,
+ HasReason("Address too long: 513 > 512"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Valid IPv6.
+ s << MakeSpan(ParseHex("02" // network type (IPv6)
+ "10" // address length
+ "0102030405060708090a0b0c0d0e0f10")); // address
+ s >> addr;
+ BOOST_CHECK(addr.IsValid());
+ BOOST_CHECK(addr.IsIPv6());
+ BOOST_CHECK_EQUAL(addr.ToString(), "102:304:506:708:90a:b0c:d0e:f10");
+ BOOST_REQUIRE(s.empty());
+
+ // Valid IPv6, contains embedded "internal".
+ s << MakeSpan(ParseHex(
+ "02" // network type (IPv6)
+ "10" // address length
+ "fd6b88c08724ca978112ca1bbdcafac2")); // address: 0xfd + sha256("bitcoin")[0:5] +
+ // sha256(name)[0:10]
+ s >> addr;
+ BOOST_CHECK(addr.IsInternal());
+ BOOST_CHECK_EQUAL(addr.ToString(), "zklycewkdo64v6wc.internal");
+ BOOST_REQUIRE(s.empty());
+
+ // Invalid IPv6, with bogus length.
+ s << MakeSpan(ParseHex("02" // network type (IPv6)
+ "04" // address length
+ "00")); // address
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure,
+ HasReason("BIP155 IPv6 address with length 4 (should be 16)"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Invalid IPv6, contains embedded IPv4.
+ s << MakeSpan(ParseHex("02" // network type (IPv6)
+ "10" // address length
+ "00000000000000000000ffff01020304")); // address
+ s >> addr;
+ BOOST_CHECK(!addr.IsValid());
+ BOOST_REQUIRE(s.empty());
+
+ // Invalid IPv6, contains embedded TORv2.
+ s << MakeSpan(ParseHex("02" // network type (IPv6)
+ "10" // address length
+ "fd87d87eeb430102030405060708090a")); // address
+ s >> addr;
+ BOOST_CHECK(!addr.IsValid());
+ BOOST_REQUIRE(s.empty());
+
+ // Valid TORv2.
+ s << MakeSpan(ParseHex("03" // network type (TORv2)
+ "0a" // address length
+ "f1f2f3f4f5f6f7f8f9fa")); // address
+ s >> addr;
+ BOOST_CHECK(addr.IsValid());
+ BOOST_CHECK(addr.IsTor());
+ BOOST_CHECK_EQUAL(addr.ToString(), "6hzph5hv6337r6p2.onion");
+ BOOST_REQUIRE(s.empty());
+
+ // Invalid TORv2, with bogus length.
+ s << MakeSpan(ParseHex("03" // network type (TORv2)
+ "07" // address length
+ "00")); // address
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure,
+ HasReason("BIP155 TORv2 address with length 7 (should be 10)"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Valid TORv3.
+ s << MakeSpan(ParseHex("04" // network type (TORv3)
+ "20" // address length
+ "79bcc625184b05194975c28b66b66b04" // address
+ "69f7f6556fb1ac3189a79b40dda32f1f"
+ ));
+ s >> addr;
+ BOOST_CHECK(addr.IsValid());
+ BOOST_CHECK(addr.IsTor());
+ BOOST_CHECK_EQUAL(addr.ToString(),
+ "pg6mmjiyjmcrsslvykfwnntlaru7p5svn6y2ymmju6nubxndf4pscryd.onion");
+ BOOST_REQUIRE(s.empty());
+
+ // Invalid TORv3, with bogus length.
+ s << MakeSpan(ParseHex("04" // network type (TORv3)
+ "00" // address length
+ "00" // address
+ ));
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure,
+ HasReason("BIP155 TORv3 address with length 0 (should be 32)"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Valid I2P.
+ s << MakeSpan(ParseHex("05" // network type (I2P)
+ "20" // address length
+ "a2894dabaec08c0051a481a6dac88b64" // address
+ "f98232ae42d4b6fd2fa81952dfe36a87"));
+ s >> addr;
+ BOOST_CHECK(addr.IsValid());
+ BOOST_CHECK_EQUAL(addr.ToString(),
+ "ukeu3k5oycgaauneqgtnvselmt4yemvoilkln7jpvamvfx7dnkdq.b32.i2p");
+ BOOST_REQUIRE(s.empty());
+
+ // Invalid I2P, with bogus length.
+ s << MakeSpan(ParseHex("05" // network type (I2P)
+ "03" // address length
+ "00" // address
+ ));
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure,
+ HasReason("BIP155 I2P address with length 3 (should be 32)"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Valid CJDNS.
+ s << MakeSpan(ParseHex("06" // network type (CJDNS)
+ "10" // address length
+ "fc000001000200030004000500060007" // address
+ ));
+ s >> addr;
+ BOOST_CHECK(addr.IsValid());
+ BOOST_CHECK_EQUAL(addr.ToString(), "fc00:1:2:3:4:5:6:7");
+ BOOST_REQUIRE(s.empty());
+
+ // Invalid CJDNS, with bogus length.
+ s << MakeSpan(ParseHex("06" // network type (CJDNS)
+ "01" // address length
+ "00" // address
+ ));
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure,
+ HasReason("BIP155 CJDNS address with length 1 (should be 16)"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Unknown, with extreme length.
+ s << MakeSpan(ParseHex("aa" // network type (unknown)
+ "fe00000002" // address length (CompactSize's MAX_SIZE)
+ "01020304050607" // address
+ ));
+ BOOST_CHECK_EXCEPTION(s >> addr, std::ios_base::failure,
+ HasReason("Address too long: 33554432 > 512"));
+ BOOST_REQUIRE(!s.empty()); // The stream is not consumed on invalid input.
+ s.clear();
+
+ // Unknown, with reasonable length.
+ s << MakeSpan(ParseHex("aa" // network type (unknown)
+ "04" // address length
+ "01020304" // address
+ ));
+ s >> addr;
+ BOOST_CHECK(!addr.IsValid());
+ BOOST_REQUIRE(s.empty());
+
+ // Unknown, with zero length.
+ s << MakeSpan(ParseHex("aa" // network type (unknown)
+ "00" // address length
+ "" // address
+ ));
+ s >> addr;
+ BOOST_CHECK(!addr.IsValid());
+ BOOST_REQUIRE(s.empty());
+}
+
// prior to PR #14728, this test triggers an undefined behavior
BOOST_AUTO_TEST_CASE(ipv4_peer_with_ipv6_addrMe_test)
{
diff --git a/src/test/util/setup_common.h b/src/test/util/setup_common.h
index 22f5d6d936..a09c8c122d 100644
--- a/src/test/util/setup_common.h
+++ b/src/test/util/setup_common.h
@@ -153,4 +153,20 @@ CBlock getBlock13b8a();
// define an implicit conversion here so that uint256 may be used directly in BOOST_CHECK_*
std::ostream& operator<<(std::ostream& os, const uint256& num);
+/**
+ * BOOST_CHECK_EXCEPTION predicates to check the specific validation error.
+ * Use as
+ * BOOST_CHECK_EXCEPTION(code that throws, exception type, HasReason("foo"));
+ */
+class HasReason {
+public:
+ explicit HasReason(const std::string& reason) : m_reason(reason) {}
+ template <typename E>
+ bool operator() (const E& e) const {
+ return std::string(e.what()).find(m_reason) != std::string::npos;
+ };
+private:
+ const std::string m_reason;
+};
+
#endif
diff --git a/src/util/strencodings.cpp b/src/util/strencodings.cpp
index 079a4529a3..3236184b0b 100644
--- a/src/util/strencodings.cpp
+++ b/src/util/strencodings.cpp
@@ -201,20 +201,24 @@ std::string DecodeBase64(const std::string& str, bool* pf_invalid)
return std::string((const char*)vchRet.data(), vchRet.size());
}
-std::string EncodeBase32(Span<const unsigned char> input)
+std::string EncodeBase32(Span<const unsigned char> input, bool pad)
{
static const char *pbase32 = "abcdefghijklmnopqrstuvwxyz234567";
std::string str;
str.reserve(((input.size() + 4) / 5) * 8);
ConvertBits<8, 5, true>([&](int v) { str += pbase32[v]; }, input.begin(), input.end());
- while (str.size() % 8) str += '=';
+ if (pad) {
+ while (str.size() % 8) {
+ str += '=';
+ }
+ }
return str;
}
-std::string EncodeBase32(const std::string& str)
+std::string EncodeBase32(const std::string& str, bool pad)
{
- return EncodeBase32(MakeUCharSpan(str));
+ return EncodeBase32(MakeUCharSpan(str), pad);
}
std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid)
diff --git a/src/util/strencodings.h b/src/util/strencodings.h
index 1519214140..1a217dd12d 100644
--- a/src/util/strencodings.h
+++ b/src/util/strencodings.h
@@ -52,8 +52,20 @@ std::string EncodeBase64(Span<const unsigned char> input);
std::string EncodeBase64(const std::string& str);
std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid = nullptr);
std::string DecodeBase32(const std::string& str, bool* pf_invalid = nullptr);
-std::string EncodeBase32(Span<const unsigned char> input);
-std::string EncodeBase32(const std::string& str);
+
+/**
+ * Base32 encode.
+ * If `pad` is true, then the output will be padded with '=' so that its length
+ * is a multiple of 8.
+ */
+std::string EncodeBase32(Span<const unsigned char> input, bool pad = true);
+
+/**
+ * Base32 encode.
+ * If `pad` is true, then the output will be padded with '=' so that its length
+ * is a multiple of 8.
+ */
+std::string EncodeBase32(const std::string& str, bool pad = true);
void SplitHostPort(std::string in, int& portOut, std::string& hostOut);
int64_t atoi64(const std::string& str);
diff --git a/src/util/string.h b/src/util/string.h
index cdb41630c6..a0c87bd00c 100644
--- a/src/util/string.h
+++ b/src/util/string.h
@@ -7,6 +7,8 @@
#include <attributes.h>
+#include <algorithm>
+#include <array>
#include <cstring>
#include <locale>
#include <sstream>
@@ -74,4 +76,15 @@ std::string ToString(const T& t)
return oss.str();
}
+/**
+ * Check whether a container begins with the given prefix.
+ */
+template <typename T1, size_t PREFIX_LEN>
+NODISCARD inline bool HasPrefix(const T1& obj,
+ const std::array<uint8_t, PREFIX_LEN>& prefix)
+{
+ return obj.size() >= PREFIX_LEN &&
+ std::equal(std::begin(prefix), std::end(prefix), std::begin(obj));
+}
+
#endif // BITCOIN_UTIL_STRENCODINGS_H
diff --git a/src/version.h b/src/version.h
index b5f379e1b8..019c3a3ae7 100644
--- a/src/version.h
+++ b/src/version.h
@@ -38,4 +38,7 @@ static const int INVALID_CB_NO_BAN_VERSION = 70015;
//! "wtxidrelay" command for wtxid-based relay starts with this version
static const int WTXID_RELAY_VERSION = 70016;
+// Make sure that none of the values above collide with
+// `SERIALIZE_TRANSACTION_NO_WITNESS` or `ADDRV2_FORMAT`.
+
#endif // BITCOIN_VERSION_H
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-01 06:58:35 +0000