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server_certificate_verifier extended to reuse built-in verifier #2064

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Merged
merged 8 commits into from
Feb 17, 2025
Merged

server_certificate_verifier extended to reuse built-in verifier #2064

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c27d1fd
server_certificate_verifier extended to reuse built-in verifier
Feb 16, 2025
1be86c8
code cleanup and SSLVerifierResponse enum clarification as per @falbr…
Feb 17, 2025
59888ae
cleanup
Feb 17, 2025
d62d1cb
clang-format
Feb 17, 2025
c45f344
change local var verification_status_ declaration to auto
Feb 17, 2025
ce7dc7a
change local var verification_status_ to verification_status
Feb 17, 2025
a46b287
clang-format
Feb 17, 2025
5c2bce6
clang-format
Feb 17, 2025
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37 changes: 27 additions & 10 deletions httplib.h
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Original file line number Diff line number Diff line change
Expand Up @@ -435,6 +435,15 @@ struct scope_exit {

} // namespace detail

enum SSLVerifierResponse {
// no decision has been made, use the built-in certificate verifier
NoDecisionMade,
// connection certificate is verified and accepted
CertificateAccepted,
// connection certificate was processed but is rejected
CertificateRejected
};

enum StatusCode {
// Information responses
Continue_100 = 100,
Expand Down Expand Up @@ -1483,7 +1492,8 @@ class ClientImpl {
#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
void enable_server_certificate_verification(bool enabled);
void enable_server_hostname_verification(bool enabled);
void set_server_certificate_verifier(std::function<bool(SSL *ssl)> verifier);
void set_server_certificate_verifier(
std::function<SSLVerifierResponse(SSL *ssl)> verifier);
#endif

void set_logger(Logger logger);
Expand Down Expand Up @@ -1600,7 +1610,7 @@ class ClientImpl {
#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
bool server_certificate_verification_ = true;
bool server_hostname_verification_ = true;
std::function<bool(SSL *ssl)> server_certificate_verifier_;
std::function<SSLVerifierResponse(SSL *ssl)> server_certificate_verifier_;
#endif

Logger logger_;
Expand Down Expand Up @@ -1913,7 +1923,8 @@ class Client {
#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
void enable_server_certificate_verification(bool enabled);
void enable_server_hostname_verification(bool enabled);
void set_server_certificate_verifier(std::function<bool(SSL *ssl)> verifier);
void set_server_certificate_verifier(
std::function<SSLVerifierResponse(SSL *ssl)> verifier);
#endif

void set_logger(Logger logger);
Expand Down Expand Up @@ -9009,7 +9020,7 @@ inline void ClientImpl::enable_server_hostname_verification(bool enabled) {
}

inline void ClientImpl::set_server_certificate_verifier(
std::function<bool(SSL *ssl)> verifier) {
std::function<SSLVerifierResponse(SSL *ssl)> verifier) {
server_certificate_verifier_ = verifier;
}
#endif
Expand Down Expand Up @@ -9623,12 +9634,18 @@ inline bool SSLClient::initialize_ssl(Socket &socket, Error &error) {
}

if (server_certificate_verification_) {
auto verification_status = SSLVerifierResponse::NoDecisionMade;

if (server_certificate_verifier_) {
if (!server_certificate_verifier_(ssl2)) {
error = Error::SSLServerVerification;
return false;
}
} else {
verification_status = server_certificate_verifier_(ssl2);
}

if (verification_status == SSLVerifierResponse::CertificateRejected) {
error = Error::SSLServerVerification;
return false;
}

if (verification_status == SSLVerifierResponse::NoDecisionMade) {
verify_result_ = SSL_get_verify_result(ssl2);

if (verify_result_ != X509_V_OK) {
Expand Down Expand Up @@ -10389,7 +10406,7 @@ inline void Client::enable_server_hostname_verification(bool enabled) {
}

inline void Client::set_server_certificate_verifier(
std::function<bool(SSL *ssl)> verifier) {
std::function<SSLVerifierResponse(SSL *ssl)> verifier) {
cli_->set_server_certificate_verifier(verifier);
}
#endif
Expand Down
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