Add support for msg_callback #963
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This is working, but I still want to improve string allocation in the callbacks. |
| args.version = rb_sprintf("Not TLS data or unknown version (version=%d, content_type=%d)", version, content_type); | ||
| } | ||
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| args.buf = rb_str_new(bp, len); |
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Any Ruby object allocation that isn't an immediate value can potentially fail, so these rb_str_new*() calls need to be moved to inside rb_protect().
| rb_set_errinfo(Qnil); | ||
| rb_warn("exception in msg_callback is ignored"); |
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| rb_set_errinfo(Qnil); | |
| rb_warn("exception in msg_callback is ignored"); | |
| VALUE ssl_obj = (VALUE)SSL_get_ex_data(ssl, ossl_ssl_ex_ptr_idx); | |
| rb_ivar_set(ssl_obj, ID_callback_state, INT2NUM(state)); |
| static STRINT_PAIR ssl_versions[] = { | ||
| {"SSL 3.0", SSL3_VERSION}, | ||
| {"TLS 1.0", TLS1_VERSION}, | ||
| {"TLS 1.1", TLS1_1_VERSION}, | ||
| {"TLS 1.2", TLS1_2_VERSION}, | ||
| {"TLS 1.3", TLS1_3_VERSION}, | ||
| {"DTLS 1.0", DTLS1_VERSION}, | ||
| {"DTLS 1.0 (bad)", DTLS1_BAD_VER}, | ||
| {NULL} | ||
| }; | ||
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| static STRINT_PAIR alert_types[] = { | ||
| {"close_notify", 0}, | ||
| {"end_of_early_data", 1}, | ||
| {"unexpected_message", 10}, | ||
| {"bad_record_mac", 20}, | ||
| {"decryption_failed", 21}, | ||
| {"record_overflow", 22}, | ||
| {"decompression_failure", 30}, | ||
| {"handshake_failure", 40}, | ||
| {"bad_certificate", 42}, | ||
| {"unsupported_certificate", 43}, | ||
| {"certificate_revoked", 44}, | ||
| {"certificate_expired", 45}, | ||
| {"certificate_unknown", 46}, | ||
| {"illegal_parameter", 47}, | ||
| {"unknown_ca", 48}, | ||
| {"access_denied", 49}, | ||
| {"decode_error", 50}, | ||
| {"decrypt_error", 51}, | ||
| {"export_restriction", 60}, | ||
| {"protocol_version", 70}, | ||
| {"insufficient_security", 71}, | ||
| {"internal_error", 80}, | ||
| {"inappropriate_fallback", 86}, | ||
| {"user_canceled", 90}, | ||
| {"no_renegotiation", 100}, | ||
| {"missing_extension", 109}, | ||
| {"unsupported_extension", 110}, | ||
| {"certificate_unobtainable", 111}, | ||
| {"unrecognized_name", 112}, | ||
| {"bad_certificate_status_response", 113}, | ||
| {"bad_certificate_hash_value", 114}, | ||
| {"unknown_psk_identity", 115}, | ||
| {"certificate_required", 116}, | ||
| {NULL} | ||
| }; | ||
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| static STRINT_PAIR handshakes[] = { | ||
| {"HelloRequest", SSL3_MT_HELLO_REQUEST}, | ||
| {"ClientHello", SSL3_MT_CLIENT_HELLO}, | ||
| {"ServerHello", SSL3_MT_SERVER_HELLO}, | ||
| {"HelloVerifyRequest", DTLS1_MT_HELLO_VERIFY_REQUEST}, | ||
| {"NewSessionTicket", SSL3_MT_NEWSESSION_TICKET}, | ||
| {"EndOfEarlyData", SSL3_MT_END_OF_EARLY_DATA}, | ||
| {"EncryptedExtensions", SSL3_MT_ENCRYPTED_EXTENSIONS}, | ||
| {"Certificate", SSL3_MT_CERTIFICATE}, | ||
| {"ServerKeyExchange", SSL3_MT_SERVER_KEY_EXCHANGE}, | ||
| {"CertificateRequest", SSL3_MT_CERTIFICATE_REQUEST}, | ||
| {"ServerHelloDone", SSL3_MT_SERVER_DONE}, | ||
| {"CertificateVerify", SSL3_MT_CERTIFICATE_VERIFY}, | ||
| {"ClientKeyExchange", SSL3_MT_CLIENT_KEY_EXCHANGE}, | ||
| {"Finished", SSL3_MT_FINISHED}, | ||
| {"CertificateUrl", SSL3_MT_CERTIFICATE_URL}, | ||
| {"CertificateStatus", SSL3_MT_CERTIFICATE_STATUS}, | ||
| {"SupplementalData", SSL3_MT_SUPPLEMENTAL_DATA}, | ||
| {"KeyUpdate", SSL3_MT_KEY_UPDATE}, | ||
| {"CompressedCertificate", SSL3_MT_COMPRESSED_CERTIFICATE}, | ||
| #ifndef OPENSSL_NO_NEXTPROTONEG | ||
| {"NextProto", SSL3_MT_NEXT_PROTO}, | ||
| #endif | ||
| {"MessageHash", SSL3_MT_MESSAGE_HASH}, | ||
| {NULL} | ||
| }; |
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Is there any way to get human-readable strings from the OpenSSL library? I'd prefer not to maintain these string lists within ruby/openssl, since they're likely to fall out of sync quickly.
| cb = rb_attr_get(v_ctx, id_i_msg_callback); | ||
| if (!NIL_P(cb)) { | ||
| SSL_set_msg_callback(ssl, imp_ssl_msg_callback); | ||
| SSL_set_msg_callback_arg(ssl, (void *)cb); |
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A GC compaction could make the cb reference stale. We need to either prevent compaction by calling rb_gc_mark(the_proc_object) in ossl_ssl_mark(), or implement a "dcompact" handler to update the stored reference after a compaction.
Alternatively, since imp_ssl_msg_callback() receives the SSL *, it can look up id_i_msg_callback there. This is probably easier and is what existing callbacks currently do.
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We probably should set the callback to SSL_CTX, in ossl_sslctx_setup(). All SSL objects created with the SSL_CTX will inherit the settings.
| id_i_alpn_select_cb, id_i_alpn_protocols, id_i_servername_cb, | ||
| id_i_verify_hostname, id_i_keylog_cb, id_i_tmp_dh_callback; | ||
| id_i_verify_hostname, id_i_keylog_cb, id_i_tmp_dh_callback, | ||
| id_i_msg_callback; |
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The indentation is inconsistent throughout the patch. You might need to configure your text editor to use a tab size of 8.
2 participants
Closes #800
Note that the callback code is mostly based on apps/lib/s_cb.c in openssl.