1 #pragma once 2 3 #include "logging.hpp" 4 #include "persistent_data.hpp" 5 6 #include <openssl/crypto.h> 7 #include <openssl/ssl.h> 8 9 #include <boost/asio/ip/address.hpp> 10 #include <boost/asio/ssl/verify_context.hpp> 11 12 #include <memory> 13 #include <span> 14 15 inline std::shared_ptr<persistent_data::UserSession> 16 verifyMtlsUser(const boost::asio::ip::address& clientIp, 17 boost::asio::ssl::verify_context& ctx) 18 { 19 // do nothing if TLS is disabled 20 if (!persistent_data::SessionStore::getInstance() 21 .getAuthMethodsConfig() 22 .tls) 23 { 24 BMCWEB_LOG_DEBUG("TLS auth_config is disabled"); 25 return nullptr; 26 } 27 28 X509_STORE_CTX* cts = ctx.native_handle(); 29 if (cts == nullptr) 30 { 31 BMCWEB_LOG_DEBUG("Cannot get native TLS handle."); 32 return nullptr; 33 } 34 35 // Get certificate 36 X509* peerCert = X509_STORE_CTX_get_current_cert(ctx.native_handle()); 37 if (peerCert == nullptr) 38 { 39 BMCWEB_LOG_DEBUG("Cannot get current TLS certificate."); 40 return nullptr; 41 } 42 43 // Check if certificate is OK 44 int ctxError = X509_STORE_CTX_get_error(cts); 45 if (ctxError != X509_V_OK) 46 { 47 BMCWEB_LOG_INFO("Last TLS error is: {}", ctxError); 48 return nullptr; 49 } 50 51 // Check that we have reached final certificate in chain 52 int32_t depth = X509_STORE_CTX_get_error_depth(cts); 53 if (depth != 0) 54 { 55 BMCWEB_LOG_DEBUG( 56 "Certificate verification in progress (depth {}), waiting to reach final depth", 57 depth); 58 return nullptr; 59 } 60 61 BMCWEB_LOG_DEBUG("Certificate verification of final depth"); 62 63 if (X509_check_purpose(peerCert, X509_PURPOSE_SSL_CLIENT, 0) != 1) 64 { 65 BMCWEB_LOG_DEBUG( 66 "Chain does not allow certificate to be used for SSL client authentication"); 67 return nullptr; 68 } 69 70 std::string sslUser; 71 // Extract username contained in CommonName 72 sslUser.resize(256, '\0'); 73 74 int status = X509_NAME_get_text_by_NID(X509_get_subject_name(peerCert), 75 NID_commonName, sslUser.data(), 76 static_cast<int>(sslUser.size())); 77 78 if (status == -1) 79 { 80 BMCWEB_LOG_DEBUG("TLS cannot get username to create session"); 81 return nullptr; 82 } 83 84 size_t lastChar = sslUser.find('\0'); 85 if (lastChar == std::string::npos || lastChar == 0) 86 { 87 BMCWEB_LOG_DEBUG("Invalid TLS user name"); 88 return nullptr; 89 } 90 sslUser.resize(lastChar); 91 std::string unsupportedClientId; 92 return persistent_data::SessionStore::getInstance().generateUserSession( 93 sslUser, clientIp, unsupportedClientId, 94 persistent_data::PersistenceType::TIMEOUT); 95 } 96