1 #pragma once 2 #ifdef CROW_ENABLE_SSL 3 4 #include <openssl/bio.h> 5 #include <openssl/dh.h> 6 #include <openssl/dsa.h> 7 #include <openssl/dsa.h> 8 #include <openssl/err.h> 9 #include <openssl/evp.h> 10 #include <openssl/pem.h> 11 #include <openssl/rand.h> 12 #include <openssl/rsa.h> 13 #include <openssl/ssl.h> 14 #include <random> 15 #include <boost/asio.hpp> 16 17 namespace ensuressl { 18 static void init_openssl(void); 19 static void cleanup_openssl(void); 20 static EVP_PKEY *create_rsa_key(void); 21 static EVP_PKEY *create_ec_key(void); 22 static void handle_openssl_error(void); 23 24 inline bool verify_openssl_key_cert(const std::string &filepath) { 25 bool private_key_valid = false; 26 bool cert_valid = false; 27 28 std::cout << "Checking certs in file " << filepath << "\n"; 29 30 FILE *file = fopen(filepath.c_str(), "r"); 31 if (file != NULL) { 32 EVP_PKEY *pkey = PEM_read_PrivateKey(file, NULL, NULL, NULL); 33 int rc; 34 if (pkey) { 35 RSA *rsa = EVP_PKEY_get1_RSA(pkey); 36 if (rsa) { 37 std::cout << "Found an RSA key\n"; 38 if (RSA_check_key(rsa) == 1) { 39 // private_key_valid = true; 40 } else { 41 std::cerr << "Key not valid error number " << ERR_get_error() << "\n"; 42 } 43 RSA_free(rsa); 44 } else { 45 EC_KEY *ec = EVP_PKEY_get1_EC_KEY(pkey); 46 if (ec) { 47 std::cout << "Found an EC key\n"; 48 if (EC_KEY_check_key(ec) == 1) { 49 private_key_valid = true; 50 } else { 51 std::cerr << "Key not valid error number " << ERR_get_error() << "\n"; 52 } 53 EC_KEY_free(ec); 54 } 55 } 56 57 if (private_key_valid) { 58 X509 *x509 = PEM_read_X509(file, NULL, NULL, NULL); 59 if (!x509) { 60 std::cout << "error getting x509 cert " << ERR_get_error() << "\n"; 61 } else { 62 rc = X509_verify(x509, pkey); 63 if (rc == 1) { 64 cert_valid = true; 65 } else { 66 std::cerr << "Error in verifying private key signature " 67 << ERR_get_error() << "\n"; 68 } 69 } 70 } 71 72 EVP_PKEY_free(pkey); 73 } 74 fclose(file); 75 } 76 return cert_valid; 77 } 78 79 inline void generate_ssl_certificate(const std::string &filepath) { 80 FILE *pFile = NULL; 81 std::cout << "Generating new keys\n"; 82 init_openssl(); 83 84 // std::cerr << "Generating RSA key"; 85 // EVP_PKEY *pRsaPrivKey = create_rsa_key(); 86 87 std::cerr << "Generating EC key\n"; 88 EVP_PKEY *pRsaPrivKey = create_ec_key(); 89 if (pRsaPrivKey) { 90 std::cerr << "Generating x509 Certificate\n"; 91 // Use this code to directly generate a certificate 92 X509 *x509; 93 x509 = X509_new(); 94 if (x509) { 95 // Get a random number from the RNG for the certificate serial number 96 // If this is not random, regenerating certs throws broswer errors 97 std::random_device rd; 98 int serial = rd(); 99 100 ASN1_INTEGER_set(X509_get_serialNumber(x509), serial); 101 102 // not before this moment 103 X509_gmtime_adj(X509_get_notBefore(x509), 0); 104 // Cert is valid for 10 years 105 X509_gmtime_adj(X509_get_notAfter(x509), 60L * 60L * 24L * 365L * 10L); 106 107 // set the public key to the key we just generated 108 X509_set_pubkey(x509, pRsaPrivKey); 109 110 // Get the subject name 111 X509_NAME *name; 112 name = X509_get_subject_name(x509); 113 114 X509_NAME_add_entry_by_txt(name, "C", MBSTRING_ASC, (unsigned char *)"US", 115 -1, -1, 0); 116 X509_NAME_add_entry_by_txt(name, "O", MBSTRING_ASC, 117 (unsigned char *)"Intel BMC", -1, -1, 0); 118 X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, 119 (unsigned char *)"testhost", -1, -1, 0); 120 // set the CSR options 121 X509_set_issuer_name(x509, name); 122 123 // Sign the certificate with our private key 124 X509_sign(x509, pRsaPrivKey, EVP_sha256()); 125 126 pFile = fopen(filepath.c_str(), "wt"); 127 128 if (pFile) { 129 PEM_write_PrivateKey(pFile, pRsaPrivKey, NULL, NULL, 0, 0, NULL); 130 131 PEM_write_X509(pFile, x509); 132 fclose(pFile); 133 pFile = NULL; 134 } 135 136 X509_free(x509); 137 } 138 139 EVP_PKEY_free(pRsaPrivKey); 140 pRsaPrivKey = NULL; 141 } 142 143 // cleanup_openssl(); 144 } 145 146 EVP_PKEY *create_rsa_key(void) { 147 RSA *pRSA = NULL; 148 #if OPENSSL_VERSION_NUMBER < 0x00908000L 149 pRSA = RSA_generate_key(2048, RSA_3, NULL, NULL); 150 #else 151 RSA_generate_key_ex(pRSA, 2048, NULL, NULL); 152 #endif 153 154 EVP_PKEY *pKey = EVP_PKEY_new(); 155 if (pRSA && pKey && EVP_PKEY_assign_RSA(pKey, pRSA)) { 156 /* pKey owns pRSA from now */ 157 if (RSA_check_key(pRSA) <= 0) { 158 fprintf(stderr, "RSA_check_key failed.\n"); 159 handle_openssl_error(); 160 EVP_PKEY_free(pKey); 161 pKey = NULL; 162 } 163 } else { 164 handle_openssl_error(); 165 if (pRSA) { 166 RSA_free(pRSA); 167 pRSA = NULL; 168 } 169 if (pKey) { 170 EVP_PKEY_free(pKey); 171 pKey = NULL; 172 } 173 } 174 return pKey; 175 } 176 177 EVP_PKEY *create_ec_key(void) { 178 EVP_PKEY *pKey = NULL; 179 int eccgrp = 0; 180 eccgrp = OBJ_txt2nid("prime256v1"); 181 182 EC_KEY *myecc = EC_KEY_new_by_curve_name(eccgrp); 183 if (myecc) { 184 EC_KEY_set_asn1_flag(myecc, OPENSSL_EC_NAMED_CURVE); 185 EC_KEY_generate_key(myecc); 186 pKey = EVP_PKEY_new(); 187 if (pKey) { 188 if (EVP_PKEY_assign_EC_KEY(pKey, myecc)) { 189 /* pKey owns pRSA from now */ 190 if (EC_KEY_check_key(myecc) <= 0) { 191 fprintf(stderr, "EC_check_key failed.\n"); 192 } 193 } 194 } 195 } 196 return pKey; 197 } 198 199 void init_openssl(void) { 200 #if OPENSSL_VERSION_NUMBER < 0x10100000L 201 SSL_load_error_strings(); 202 OpenSSL_add_all_algorithms(); 203 RAND_load_file("/dev/urandom", 1024); 204 #endif 205 } 206 207 void cleanup_openssl(void) { 208 CRYPTO_cleanup_all_ex_data(); 209 ERR_free_strings(); 210 #if OPENSSL_VERSION_NUMBER < 0x10100000L 211 ERR_remove_thread_state(0); 212 #endif 213 EVP_cleanup(); 214 } 215 216 void handle_openssl_error(void) { ERR_print_errors_fp(stderr); } 217 inline void ensure_openssl_key_present_and_valid(const std::string &filepath) { 218 bool pem_file_valid = false; 219 220 pem_file_valid = verify_openssl_key_cert(filepath); 221 222 if (!pem_file_valid) { 223 std::cerr << "Error in verifying signature, regenerating\n"; 224 generate_ssl_certificate(filepath); 225 } 226 } 227 228 boost::asio::ssl::context get_ssl_context(std::string ssl_pem_file) { 229 boost::asio::ssl::context m_ssl_context{boost::asio::ssl::context::sslv23}; 230 m_ssl_context.set_options(boost::asio::ssl::context::default_workarounds | 231 boost::asio::ssl::context::no_sslv2 | 232 boost::asio::ssl::context::no_sslv3 | 233 boost::asio::ssl::context::single_dh_use | 234 boost::asio::ssl::context::no_tlsv1 | 235 boost::asio::ssl::context::no_tlsv1_1); 236 237 // m_ssl_context.set_verify_mode(boost::asio::ssl::verify_peer); 238 m_ssl_context.use_certificate_file(ssl_pem_file, 239 boost::asio::ssl::context::pem); 240 m_ssl_context.use_private_key_file(ssl_pem_file, 241 boost::asio::ssl::context::pem); 242 243 // Set up EC curves to auto (boost asio doesn't have a method for this) 244 // There is a pull request to add this. Once this is included in an asio 245 // drop, use the right way 246 // http://stackoverflow.com/questions/18929049/boost-asio-with-ecdsa-certificate-issue 247 if (SSL_CTX_set_ecdh_auto(m_ssl_context.native_handle(), 1) != 1) { 248 CROW_LOG_ERROR << "Error setting tmp ecdh list\n"; 249 } 250 251 // From mozilla "compatibility" 252 std::string ciphers = 253 "ECDHE-ECDSA-CHACHA20-POLY1305:" 254 "ECDHE-RSA-CHACHA20-POLY1305:" 255 "ECDHE-ECDSA-AES128-GCM-SHA256:" 256 "ECDHE-RSA-AES128-GCM-SHA256:" 257 "ECDHE-ECDSA-AES256-GCM-SHA384:" 258 "ECDHE-RSA-AES256-GCM-SHA384:" 259 "DHE-RSA-AES128-GCM-SHA256:" 260 "DHE-RSA-AES256-GCM-SHA384:" 261 "ECDHE-ECDSA-AES128-SHA256:" 262 "ECDHE-RSA-AES128-SHA256:" 263 "ECDHE-ECDSA-AES128-SHA:" 264 "ECDHE-RSA-AES256-SHA384:" 265 "ECDHE-RSA-AES128-SHA:" 266 "ECDHE-ECDSA-AES256-SHA384:" 267 "ECDHE-ECDSA-AES256-SHA:" 268 "ECDHE-RSA-AES256-SHA:" 269 "DHE-RSA-AES128-SHA256:" 270 "DHE-RSA-AES128-SHA:" 271 "DHE-RSA-AES256-SHA256:" 272 "DHE-RSA-AES256-SHA:" 273 "ECDHE-ECDSA-DES-CBC3-SHA:" 274 "ECDHE-RSA-DES-CBC3-SHA:" 275 "EDH-RSA-DES-CBC3-SHA:" 276 "AES128-GCM-SHA256:" 277 "AES256-GCM-SHA384:" 278 "AES128-SHA256:" 279 "AES256-SHA256:" 280 "AES128-SHA:" 281 "AES256-SHA:" 282 "DES-CBC3-SHA:" 283 "!DSS"; 284 285 // From mozilla "modern" 286 std::string modern_ciphers = 287 "ECDHE-ECDSA-AES256-GCM-SHA384:" 288 "ECDHE-RSA-AES256-GCM-SHA384:" 289 "ECDHE-ECDSA-CHACHA20-POLY1305:" 290 "ECDHE-RSA-CHACHA20-POLY1305:" 291 "ECDHE-ECDSA-AES128-GCM-SHA256:" 292 "ECDHE-RSA-AES128-GCM-SHA256:" 293 "ECDHE-ECDSA-AES256-SHA384:" 294 "ECDHE-RSA-AES256-SHA384:" 295 "ECDHE-ECDSA-AES128-SHA256:" 296 "ECDHE-RSA-AES128-SHA256"; 297 298 std::string lighttp_ciphers = "AES128+EECDH:AES128+EDH:!aNULL:!eNULL"; 299 300 if (SSL_CTX_set_cipher_list(m_ssl_context.native_handle(), lighttp_ciphers.c_str()) != 301 1) { 302 CROW_LOG_ERROR << "Error setting cipher list\n"; 303 } 304 return m_ssl_context; 305 } 306 } 307 308 #endif