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net: recognize TORv3/I2P/CJDNS networks

Browse source 
Recognizing addresses from those networks allows us to accept and gossip
them, even though we don't know how to connect to them (yet).

Co-authored-by: eriknylund <erik@daychanged.com>
This commit is contained in:
Vasil Dimov 2020-08-27 11:03:21 +02:00
parent e0d73573a3
commit 7be6ff6187
No known key found for this signature in database
GPG key ID: 54DF06F64B55CBBF
7 changed files with 365 additions and 57 deletions
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7
src/crypto/common.h
View file

@ -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;

243
src/netaddress.cpp
View file

@ -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())
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);
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);
}
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_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";
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();

37
src/netaddress.h
View file

@ -51,9 +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,
@ -94,6 +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;
@ -151,6 +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;
@ -219,6 +237,9 @@ class CNetAddr
IPV4 = 1,
IPV6 = 2,
TORV2 = 3,
TORV3 = 4,
I2P = 5,
CJDNS = 6,
};
/**
@ -245,13 +266,12 @@ class CNetAddr
* @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 recognized by this software (id 1..3) and has wrong address size.
* 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
{
@ -269,6 +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);
@ -280,17 +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

3
src/test/base32_tests.cpp
View file

@ -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]);
}

104
src/test/net_tests.cpp
View file

@ -247,13 +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
@ -261,6 +286,9 @@ 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_v1)
@ -287,6 +315,11 @@ BOOST_AUTO_TEST_CASE(cnetaddr_serialize_v1)
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");
@ -320,6 +353,11 @@ BOOST_AUTO_TEST_CASE(cnetaddr_serialize_v2)
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");
@ -435,6 +473,70 @@ BOOST_AUTO_TEST_CASE(cnetaddr_unserialize_v2)
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)

12
src/util/strencodings.cpp
View file

@ -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)

16
src/util/strencodings.h
View file

@ -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);