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nghttp: Verify server certificate and show warning if it fails

This commit is contained in:
Tatsuhiro Tsujikawa 2017-04-01 17:49:57 +09:00
parent 058122b804
commit 7ae0b2dc09
1 changed files with 27 additions and 0 deletions
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27
src/nghttp.cc
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@ -646,6 +646,11 @@ int HttpClient::resolve_host(const std::string &host, uint16_t port) {
return 0;
}
namespace {
// Just returns 1 to continue handshake.
int verify_cb(int preverify_ok, X509_STORE_CTX *ctx) { return 1; }
} // namespace
int HttpClient::initiate_connection() {
int rv;
@ -675,6 +680,17 @@ int HttpClient::initiate_connection() {
const auto &host_string =
config.host_override.empty() ? host : config.host_override;
#if (!defined(LIBRESSL_VERSION_NUMBER) && \
OPENSSL_VERSION_NUMBER >= 0x10002000L) || \
defined(OPENSSL_IS_BORINGSSL)
auto param = SSL_get0_param(ssl);
X509_VERIFY_PARAM_set_hostflags(param, 0);
X509_VERIFY_PARAM_set1_host(param, host_string.c_str(),
host_string.size());
#endif // (!defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >=
// 0x10002000L) || defined(OPENSSL_IS_BORINGSSL)
SSL_set_verify(ssl, SSL_VERIFY_PEER, verify_cb);
if (!util::numeric_host(host_string.c_str())) {
SSL_set_tlsext_host_name(ssl, host_string.c_str());
}
@ -1295,6 +1311,12 @@ int HttpClient::tls_handshake() {
readfn = &HttpClient::read_tls;
writefn = &HttpClient::write_tls;
auto verify_res = SSL_get_verify_result(ssl);
if (verify_res != X509_V_OK) {
std::cerr << "[WARNING] Certificate verification failed: "
<< X509_verify_cert_error_string(verify_res) << std::endl;
}
if (connection_made() != 0) {
return -1;
}
@ -2247,6 +2269,11 @@ int communicate(
SSL_CTX_set_mode(ssl_ctx, SSL_MODE_AUTO_RETRY);
SSL_CTX_set_mode(ssl_ctx, SSL_MODE_RELEASE_BUFFERS);
if (SSL_CTX_set_default_verify_paths(ssl_ctx) != 1) {
std::cerr << "[WARNING] Could not load system trusted CA certificates: "
<< ERR_error_string(ERR_get_error(), nullptr) << std::endl;
}
if (nghttp2::tls::ssl_ctx_set_proto_versions(
ssl_ctx, nghttp2::tls::NGHTTP2_TLS_MIN_VERSION,
nghttp2::tls::NGHTTP2_TLS_MAX_VERSION) != 0) {