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Merge pull request #244

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e6740ee Enforce DNSSEC for checkpoint updates (Thomas Winget)
dbf46a7 DNSSEC added (hardcoded key) (Thomas Winget)
pull/95/head
Riccardo Spagni 9 years ago
parent c1187fabcf e6740ee103
commit 65d6d36449
No known key found for this signature in database
GPG Key ID: 55432DF31CCD4FCD
3 changed files with 117 additions and 12 deletions
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66
src/common/dns_utils.cpp
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@ -34,7 +34,65 @@
#include <stdlib.h>
#include "include_base_utils.h"
#include <boost/filesystem/fstream.hpp>
using namespace epee;
namespace bf = boost::filesystem;
namespace
{
/*
* The following two functions were taken from unbound-anchor.c, from
* the unbound library packaged with this source. The license and source
* can be found in $PROJECT_ROOT/external/unbound
*/
/* Cert builtin commented out until it's used, as the compiler complains
// return the built in root update certificate
static const char*
get_builtin_cert(void)
{
return
// The ICANN CA fetched at 24 Sep 2010. Valid to 2028
"-----BEGIN CERTIFICATE-----\n"
"MIIDdzCCAl+gAwIBAgIBATANBgkqhkiG9w0BAQsFADBdMQ4wDAYDVQQKEwVJQ0FO\n"
"TjEmMCQGA1UECxMdSUNBTk4gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkxFjAUBgNV\n"
"BAMTDUlDQU5OIFJvb3QgQ0ExCzAJBgNVBAYTAlVTMB4XDTA5MTIyMzA0MTkxMloX\n"
"DTI5MTIxODA0MTkxMlowXTEOMAwGA1UEChMFSUNBTk4xJjAkBgNVBAsTHUlDQU5O\n"
"IENlcnRpZmljYXRpb24gQXV0aG9yaXR5MRYwFAYDVQQDEw1JQ0FOTiBSb290IENB\n"
"MQswCQYDVQQGEwJVUzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKDb\n"
"cLhPNNqc1NB+u+oVvOnJESofYS9qub0/PXagmgr37pNublVThIzyLPGCJ8gPms9S\n"
"G1TaKNIsMI7d+5IgMy3WyPEOECGIcfqEIktdR1YWfJufXcMReZwU4v/AdKzdOdfg\n"
"ONiwc6r70duEr1IiqPbVm5T05l1e6D+HkAvHGnf1LtOPGs4CHQdpIUcy2kauAEy2\n"
"paKcOcHASvbTHK7TbbvHGPB+7faAztABLoneErruEcumetcNfPMIjXKdv1V1E3C7\n"
"MSJKy+jAqqQJqjZoQGB0necZgUMiUv7JK1IPQRM2CXJllcyJrm9WFxY0c1KjBO29\n"
"iIKK69fcglKcBuFShUECAwEAAaNCMEAwDwYDVR0TAQH/BAUwAwEB/zAOBgNVHQ8B\n"
"Af8EBAMCAf4wHQYDVR0OBBYEFLpS6UmDJIZSL8eZzfyNa2kITcBQMA0GCSqGSIb3\n"
"DQEBCwUAA4IBAQAP8emCogqHny2UYFqywEuhLys7R9UKmYY4suzGO4nkbgfPFMfH\n"
"6M+Zj6owwxlwueZt1j/IaCayoKU3QsrYYoDRolpILh+FPwx7wseUEV8ZKpWsoDoD\n"
"2JFbLg2cfB8u/OlE4RYmcxxFSmXBg0yQ8/IoQt/bxOcEEhhiQ168H2yE5rxJMt9h\n"
"15nu5JBSewrCkYqYYmaxyOC3WrVGfHZxVI7MpIFcGdvSb2a1uyuua8l0BKgk3ujF\n"
"0/wsHNeP22qNyVO+XVBzrM8fk8BSUFuiT/6tZTYXRtEt5aKQZgXbKU5dUF3jT9qg\n"
"j/Br5BZw3X/zd325TvnswzMC1+ljLzHnQGGk\n"
"-----END CERTIFICATE-----\n"
;
}
*/
/** return the built in root DS trust anchor */
static const char*
get_builtin_ds(void)
{
return
". IN DS 19036 8 2 49AAC11D7B6F6446702E54A1607371607A1A41855200FD2CE1CDDE32F24E8FB5\n";
}
/************************************************************
************************************************************
***********************************************************/
} // anonymous namespace
namespace tools
{
@ -109,6 +167,8 @@ DNSResolver::DNSResolver() : m_data(new DNSResolverData())
// look for "/etc/resolv.conf" and "/etc/hosts" or platform equivalent
ub_ctx_resolvconf(m_data->m_ub_context, &empty_string);
ub_ctx_hosts(m_data->m_ub_context, &empty_string);
ub_ctx_add_ta(m_data->m_ub_context, ::get_builtin_ds());
}
DNSResolver::~DNSResolver()
@ -143,6 +203,8 @@ std::vector<std::string> DNSResolver::get_ipv4(const std::string& url, bool& dns
// call DNS resolver, blocking. if return value not zero, something went wrong
if (!ub_resolve(m_data->m_ub_context, urlC, DNS_TYPE_A, DNS_CLASS_IN, &(result.ptr)))
{
dnssec_available = (result.ptr->secure || (!result.ptr->secure && result.ptr->bogus));
dnssec_valid = !result.ptr->bogus;
if (result.ptr->havedata)
{
for (size_t i=0; result.ptr->data[i] != NULL; i++)
@ -175,6 +237,8 @@ std::vector<std::string> DNSResolver::get_ipv6(const std::string& url, bool& dns
// call DNS resolver, blocking. if return value not zero, something went wrong
if (!ub_resolve(m_data->m_ub_context, urlC, DNS_TYPE_AAAA, DNS_CLASS_IN, &(result.ptr)))
{
dnssec_available = (result.ptr->secure || (!result.ptr->secure && result.ptr->bogus));
dnssec_valid = !result.ptr->bogus;
if (result.ptr->havedata)
{
for (size_t i=0; result.ptr->data[i] != NULL; i++)
@ -207,6 +271,8 @@ std::vector<std::string> DNSResolver::get_txt_record(const std::string& url, boo
// call DNS resolver, blocking. if return value not zero, something went wrong
if (!ub_resolve(m_data->m_ub_context, urlC, DNS_TYPE_TXT, DNS_CLASS_IN, &(result.ptr)))
{
dnssec_available = (result.ptr->secure || (!result.ptr->secure && result.ptr->bogus));
dnssec_valid = !result.ptr->bogus;
if (result.ptr->havedata)
{
for (size_t i=0; result.ptr->data[i] != NULL; i++)

27
src/cryptonote_core/checkpoints_create.cpp
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@ -138,21 +138,34 @@ bool load_checkpoints_from_dns(cryptonote::checkpoints& checkpoints, bool testne
size_t cur_index = first_index;
do
{
std::string url;
if (testnet)
{
records = tools::DNSResolver::instance().get_txt_record(testnet_dns_urls[cur_index], avail, valid);
url = testnet_dns_urls[cur_index];
}
else
{
records = tools::DNSResolver::instance().get_txt_record(dns_urls[cur_index], avail, valid);
url = dns_urls[cur_index];
}
if (records.size() == 0 || (avail && !valid))
records = tools::DNSResolver::instance().get_txt_record(url, avail, valid);
if (!avail)
{
LOG_PRINT_L2("DNSSEC not available for checkpoint update at URL: " << url << ", skipping.");
}
if (!valid)
{
LOG_PRINT_L2("DNSSEC validation failed for checkpoint update at URL: " << url << ", skipping.");
}
if (records.size() == 0 || !avail || !valid)
{
cur_index++;
if (cur_index == dns_urls.size())
{
cur_index = 0;
}
records.clear();
continue;
}
break;
@ -160,13 +173,7 @@ bool load_checkpoints_from_dns(cryptonote::checkpoints& checkpoints, bool testne
if (records.size() == 0)
{
LOG_PRINT_L1("Fetching MoneroPulse checkpoints failed, no TXT records available.");
return true;
}
if (avail && !valid)
{
LOG_PRINT_L0("WARNING: MoneroPulse failed DNSSEC validation and/or returned no records");
LOG_PRINT_L0("WARNING: All MoneroPulse checkpoint URLs failed DNSSEC validation and/or returned no records");
return true;
}

36
tests/unit_tests/dns_resolver.cpp
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@ -43,13 +43,13 @@ TEST(DNSResolver, IPv4Success)
ASSERT_EQ(1, ips.size());
ASSERT_STREQ("93.184.216.119", ips[0].c_str());
//ASSERT_STREQ("93.184.216.119", ips[0].c_str());
ips = tools::DNSResolver::instance().get_ipv4("example.com", avail, valid);
ASSERT_EQ(1, ips.size());
ASSERT_STREQ("93.184.216.119", ips[0].c_str());
//ASSERT_STREQ("93.184.216.119", ips[0].c_str());
}
TEST(DNSResolver, IPv4Failure)
@ -68,6 +68,38 @@ TEST(DNSResolver, IPv4Failure)
ASSERT_EQ(0, ips.size());
}
TEST(DNSResolver, DNSSECSuccess)
{
tools::DNSResolver resolver;
bool avail, valid;
auto ips = resolver.get_ipv4("example.com", avail, valid);
ASSERT_EQ(1, ips.size());
//ASSERT_STREQ("93.184.216.119", ips[0].c_str());
ASSERT_TRUE(avail);
ASSERT_TRUE(valid);
}
TEST(DNSResolver, DNSSECFailure)
{
tools::DNSResolver resolver;
bool avail, valid;
auto ips = resolver.get_ipv4("dnssec-failed.org", avail, valid);
ASSERT_EQ(1, ips.size());
//ASSERT_STREQ("93.184.216.119", ips[0].c_str());
ASSERT_TRUE(avail);
ASSERT_FALSE(valid);
}
// It would be great to include an IPv6 test and assume it'll pass, but not every ISP / resolver plays nicely with IPv6;)
/*TEST(DNSResolver, IPv6Success)
{

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