diff options
Diffstat (limited to 'contrib/epee/src/net_ssl.cpp')
| -rw-r--r-- | contrib/epee/src/net_ssl.cpp | 131 |
1 files changed, 126 insertions, 5 deletions
diff --git a/contrib/epee/src/net_ssl.cpp b/contrib/epee/src/net_ssl.cpp index c17d86eca..7d48d2a64 100644 --- a/contrib/epee/src/net_ssl.cpp +++ b/contrib/epee/src/net_ssl.cpp @@ -78,6 +78,24 @@ namespace }; using openssl_bignum = std::unique_ptr<BIGNUM, openssl_bignum_free>; + struct openssl_ec_key_free + { + void operator()(EC_KEY* ptr) const noexcept + { + EC_KEY_free(ptr); + } + }; + using openssl_ec_key = std::unique_ptr<EC_KEY, openssl_ec_key_free>; + + struct openssl_group_free + { + void operator()(EC_GROUP* ptr) const noexcept + { + EC_GROUP_free(ptr); + } + }; + using openssl_group = std::unique_ptr<EC_GROUP, openssl_group_free>; + boost::system::error_code load_ca_file(boost::asio::ssl::context& ctx, const std::string& path) { SSL_CTX* const ssl_ctx = ctx.native_handle(); // could be moved from context @@ -101,7 +119,7 @@ namespace net_utils // https://stackoverflow.com/questions/256405/programmatically-create-x509-certificate-using-openssl -bool create_ssl_certificate(EVP_PKEY *&pkey, X509 *&cert) +bool create_rsa_ssl_certificate(EVP_PKEY *&pkey, X509 *&cert) { MGINFO("Generating SSL certificate"); pkey = EVP_PKEY_new(); @@ -171,6 +189,87 @@ bool create_ssl_certificate(EVP_PKEY *&pkey, X509 *&cert) return true; } +bool create_ec_ssl_certificate(EVP_PKEY *&pkey, X509 *&cert, int type) +{ + MGINFO("Generating SSL certificate"); + pkey = EVP_PKEY_new(); + if (!pkey) + { + MERROR("Failed to create new private key"); + return false; + } + + openssl_pkey pkey_deleter{pkey}; + openssl_ec_key ec_key{EC_KEY_new()}; + if (!ec_key) + { + MERROR("Error allocating EC private key"); + return false; + } + + EC_GROUP *group = EC_GROUP_new_by_curve_name(type); + if (!group) + { + MERROR("Error getting EC group " << type); + return false; + } + openssl_group group_deleter{group}; + + EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE); + EC_GROUP_set_point_conversion_form(group, POINT_CONVERSION_UNCOMPRESSED); + + if (!EC_GROUP_check(group, NULL)) + { + MERROR("Group failed check: " << ERR_reason_error_string(ERR_get_error())); + return false; + } + if (EC_KEY_set_group(ec_key.get(), group) != 1) + { + MERROR("Error setting EC group"); + return false; + } + if (EC_KEY_generate_key(ec_key.get()) != 1) + { + MERROR("Error generating EC private key"); + return false; + } + if (EVP_PKEY_assign_EC_KEY(pkey, ec_key.get()) <= 0) + { + MERROR("Error assigning EC private key"); + return false; + } + + // the key is now managed by the EVP_PKEY structure + (void)ec_key.release(); + + cert = X509_new(); + if (!cert) + { + MERROR("Failed to create new X509 certificate"); + return false; + } + ASN1_INTEGER_set(X509_get_serialNumber(cert), 1); + X509_gmtime_adj(X509_get_notBefore(cert), 0); + X509_gmtime_adj(X509_get_notAfter(cert), 3600 * 24 * 182); // half a year + if (!X509_set_pubkey(cert, pkey)) + { + MERROR("Error setting pubkey on certificate"); + X509_free(cert); + return false; + } + X509_NAME *name = X509_get_subject_name(cert); + X509_set_issuer_name(cert, name); + + if (X509_sign(cert, pkey, EVP_sha256()) == 0) + { + MERROR("Error signing certificate"); + X509_free(cert); + return false; + } + (void)pkey_deleter.release(); + return true; +} + ssl_options_t::ssl_options_t(std::vector<std::vector<std::uint8_t>> fingerprints, std::string ca_path) : fingerprints_(std::move(fingerprints)), ca_path(std::move(ca_path)), @@ -195,7 +294,7 @@ boost::asio::ssl::context ssl_options_t::create_context() const ssl_context.set_options(boost::asio::ssl::context::no_tlsv1_1); // only allow a select handful of tls v1.3 and v1.2 ciphers to be used - SSL_CTX_set_cipher_list(ssl_context.native_handle(), "ECDHE-ECDSA-CHACHA20-POLY1305-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-CHACHA20-POLY1305"); + SSL_CTX_set_cipher_list(ssl_context.native_handle(), "ECDHE-ECDSA-CHACHA20-POLY1305-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256"); // set options on the SSL context for added security SSL_CTX *ctx = ssl_context.native_handle(); @@ -214,6 +313,10 @@ boost::asio::ssl::context ssl_options_t::create_context() const #ifdef SSL_OP_NO_COMPRESSION SSL_CTX_set_options(ctx, SSL_OP_NO_COMPRESSION); #endif +#ifdef SSL_OP_CIPHER_SERVER_PREFERENCE + SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE); +#endif + SSL_CTX_set_ecdh_auto(ctx, 1); switch (verification) { @@ -240,11 +343,29 @@ boost::asio::ssl::context ssl_options_t::create_context() const { EVP_PKEY *pkey; X509 *cert; - CHECK_AND_ASSERT_THROW_MES(create_ssl_certificate(pkey, cert), "Failed to create certificate"); + bool ok = false; + +#ifdef USE_EXTRA_EC_CERT + CHECK_AND_ASSERT_THROW_MES(create_ec_ssl_certificate(pkey, cert, NID_secp256k1), "Failed to create certificate"); + CHECK_AND_ASSERT_THROW_MES(SSL_CTX_use_certificate(ctx, cert), "Failed to use generated certificate"); + if (!SSL_CTX_use_PrivateKey(ctx, pkey)) + MERROR("Failed to use generated EC private key for " << NID_secp256k1); + else + ok = true; + X509_free(cert); + EVP_PKEY_free(pkey); +#endif + + CHECK_AND_ASSERT_THROW_MES(create_rsa_ssl_certificate(pkey, cert), "Failed to create certificate"); CHECK_AND_ASSERT_THROW_MES(SSL_CTX_use_certificate(ctx, cert), "Failed to use generated certificate"); - // don't free the cert, the CTX owns it now - CHECK_AND_ASSERT_THROW_MES(SSL_CTX_use_PrivateKey(ctx, pkey), "Failed to use generated private key"); + if (!SSL_CTX_use_PrivateKey(ctx, pkey)) + MERROR("Failed to use generated RSA private key for RSA"); + else + ok = true; + X509_free(cert); EVP_PKEY_free(pkey); + + CHECK_AND_ASSERT_THROW_MES(ok, "Failed to use any generated certificate"); } else auth.use_ssl_certificate(ssl_context); |