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openssl client: handle TLS options

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This commit is contained in:
Benjamin Sergeant 2019-09-29 20:07:53 -07:00
parent 864249b62d
commit 2aca019d84
2 changed files with 100 additions and 74 deletions
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173
ixwebsocket/IXSocketOpenSSL.cpp
View File

@ -17,14 +17,22 @@
namespace ix
{
const std::string kDefaultCiphers =
"ECDHE-ECDSA-AES128-GCM-SHA256 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-AES128-SHA "
"ECDHE-ECDSA-AES256-SHA ECDHE-ECDSA-AES128-SHA256 ECDHE-ECDSA-AES256-SHA384 "
"ECDHE-RSA-AES128-GCM-SHA256 ECDHE-RSA-AES256-GCM-SHA384 ECDHE-RSA-AES128-SHA "
"ECDHE-RSA-AES256-SHA ECDHE-RSA-AES128-SHA256 ECDHE-RSA-AES256-SHA384 "
"DHE-RSA-AES128-GCM-SHA256 DHE-RSA-AES256-GCM-SHA384 DHE-RSA-AES128-SHA DHE-RSA-AES256-SHA "
"DHE-RSA-AES128-SHA256 DHE-RSA-AES256-SHA256";
std::atomic<bool> SocketOpenSSL::_openSSLInitializationSuccessful(false);
std::once_flag SocketOpenSSL::_openSSLInitFlag;
SocketOpenSSL::SocketOpenSSL(const SocketTLSOptions& tlsOptions, int fd)
: Socket(fd)
, _tlsOptions(tlsOptions)
, _ssl_connection(nullptr)
, _ssl_context(nullptr)
, _tlsOptions(tlsOptions)
{
std::call_once(_openSSLInitFlag, &SocketOpenSSL::openSSLInitialize, this);
}
@ -114,20 +122,8 @@ namespace ix
SSL_CTX* ctx = SSL_CTX_new(_ssl_method);
if (ctx)
{
if (!_tlsOptions.isPeerVerifyDisabled())
{
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, [](int preverify, X509_STORE_CTX*) -> int {
return preverify;
});
SSL_CTX_set_verify_depth(ctx, 4);
}
else
{
SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, nullptr);
}
SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
SSL_CTX_set_options(
ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_CIPHER_SERVER_PREFERENCE);
}
return ctx;
}
@ -244,6 +240,90 @@ namespace ix
}
}
bool SocketOpenSSL::handleTLSOptions(std::string& errMsg)
{
ERR_clear_error();
if (_tlsOptions.hasCertAndKey())
{
if (SSL_CTX_use_certificate_chain_file(_ssl_context,
_tlsOptions.certFile.c_str()) != 1)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_use_certificate_chain_file(\"" +
_tlsOptions.certFile + "\") failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
else if (SSL_CTX_use_PrivateKey_file(
_ssl_context, _tlsOptions.keyFile.c_str(), SSL_FILETYPE_PEM) != 1)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_use_PrivateKey_file(\"" +
_tlsOptions.keyFile + "\") failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
else if (!SSL_CTX_check_private_key(_ssl_context))
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - cert/key mismatch(\"" + _tlsOptions.certFile + ", " +
_tlsOptions.keyFile + "\")";
errMsg += ERR_error_string(sslErr, nullptr);
}
}
ERR_clear_error();
if (!_tlsOptions.isPeerVerifyDisabled())
{
if (_tlsOptions.isUsingSystemDefaults())
{
if (SSL_CTX_set_default_verify_paths(_ssl_context) == 0)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_default_verify_paths loading failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
}
else if (SSL_CTX_load_verify_locations(
_ssl_context, _tlsOptions.caFile.c_str(), NULL) != 1)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_load_verify_locations(\"" +
_tlsOptions.caFile + "\") failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
SSL_CTX_set_verify(_ssl_context,
SSL_VERIFY_PEER,
[](int preverify, X509_STORE_CTX*) -> int { return preverify; });
SSL_CTX_set_verify_depth(_ssl_context, 4);
}
else
{
SSL_CTX_set_verify(_ssl_context, SSL_VERIFY_NONE, nullptr);
}
if (_tlsOptions.isUsingDefaultCiphers())
{
if (SSL_CTX_set_cipher_list(_ssl_context, kDefaultCiphers.c_str()) != 1)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_set_cipher_list(\"" +
kDefaultCiphers + "\") failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
return false;
}
}
else if (SSL_CTX_set_cipher_list(_ssl_context, _tlsOptions.ciphers.c_str()) != 1)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_set_cipher_list(\"" +
_tlsOptions.ciphers + "\") failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
return false;
}
return true;
}
bool SocketOpenSSL::connect(const std::string& host,
int port,
std::string& errMsg,
@ -268,64 +348,9 @@ namespace ix
return false;
}
ERR_clear_error();
if (_tlsOptions.isUsingClientCert())
if (!handleTLSOptions(errMsg))
{
if (SSL_CTX_use_certificate_chain_file(_ssl_context,
_tlsOptions.certFile.c_str()) != 1)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_use_certificate_chain_file(\"" +
_tlsOptions.certFile + "\") failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
else if (SSL_CTX_use_PrivateKey_file(
_ssl_context, _tlsOptions.keyFile.c_str(), SSL_FILETYPE_PEM) != 1)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_use_PrivateKey_file(\"" +
_tlsOptions.keyFile + "\") failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
}
ERR_clear_error();
if (!_tlsOptions.isPeerVerifyDisabled())
{
if (_tlsOptions.isUsingSystemDefaults())
{
if (SSL_CTX_set_default_verify_paths(_ssl_context) == 0)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_default_verify_paths loading failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
}
else
{
const char* root_ca_file = _tlsOptions.caFile.c_str();
STACK_OF(X509_NAME) * rootCAs;
rootCAs = SSL_load_client_CA_file(root_ca_file);
if (rootCAs == NULL)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_load_client_CA_file('" + _tlsOptions.caFile +
"') failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
else
{
SSL_CTX_set_client_CA_list(_ssl_context, rootCAs);
if (SSL_CTX_load_verify_locations(_ssl_context, root_ca_file, NULL) != 1)
{
auto sslErr = ERR_get_error();
errMsg = "OpenSSL failed - SSL_CTX_load_verify_locations(\"" +
_tlsOptions.caFile + "\") failed: ";
errMsg += ERR_error_string(sslErr, nullptr);
}
}
}
return false;
}
_ssl_connection = SSL_new(_ssl_context);
@ -344,8 +369,8 @@ namespace ix
#if OPENSSL_VERSION_NUMBER >= 0x10002000L
// Support for server name verification
// (The docs say that this should work from 1.0.2, and is the default from
// 1.1.0, but it does not. To be on the safe side, the manual test below is
// enabled for all versions prior to 1.1.0.)
// 1.1.0, but it does not. To be on the safe side, the manual test
// below is enabled for all versions prior to 1.1.0.)
X509_VERIFY_PARAM* param = SSL_get0_param(_ssl_connection);
X509_VERIFY_PARAM_set1_host(param, host.c_str(), 0);
#endif

1
ixwebsocket/IXSocketOpenSSL.h
View File

@ -41,6 +41,7 @@ namespace ix
bool openSSLHandshake(const std::string& hostname, std::string& errMsg);
bool openSSLCheckServerCert(SSL* ssl, const std::string& hostname, std::string& errMsg);
bool checkHost(const std::string& host, const char* pattern);
bool handleTLSOptions(std::string& errMsg);
SSL* _ssl_connection;
SSL_CTX* _ssl_context;