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Tests for SSL early callback
Plumb things through in the same place as the SNI callback, since we recommend that the early callback replace (and supplement) the SNI callback, and add a few test cases. Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/2279)
This commit is contained in:
Benjamin Kaduk
Richard Levitte
parent
6b1bb98fad
commit
80de0c5947
@ -123,6 +123,67 @@ static int select_server_ctx(SSL *s, void *arg, int ignore)
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}
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}
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static int early_select_server_ctx(SSL *s, void *arg, int ignore)
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{
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const char *servername;
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const unsigned char *p;
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size_t len, remaining;
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HANDSHAKE_EX_DATA *ex_data =
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(HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
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/*
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* The server_name extension was given too much extensibility when it
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* was written, so parsing the normal case is a bit complex.
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*/
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if (!SSL_early_get0_ext(s, TLSEXT_TYPE_server_name, &p, &remaining) ||
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remaining <= 2)
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return 0;
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/* Extract the length of the supplied list of names. */
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len = (*(p++) << 1);
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len += *(p++);
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if (len + 2 != remaining)
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return 0;
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remaining = len;
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/*
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* The list in practice only has a single element, so we only consider
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* the first one.
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*/
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if (remaining == 0 || *p++ != TLSEXT_NAMETYPE_host_name)
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return 0;
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remaining--;
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/* Now we can finally pull out the byte array with the actual hostname. */
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if (remaining <= 2)
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return 0;
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len = (*(p++) << 1);
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len += *(p++);
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if (len + 2 > remaining)
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return 0;
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remaining = len;
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servername = (const char *)p;
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if (len == strlen("server2") && strncmp(servername, "server2", len) == 0) {
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SSL_CTX *new_ctx = arg;
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SSL_set_SSL_CTX(s, new_ctx);
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/*
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* Copy over all the SSL_CTX options - reasonable behavior
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* allows testing of cases where the options between two
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* contexts differ/conflict
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*/
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SSL_clear_options(s, 0xFFFFFFFFL);
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SSL_set_options(s, SSL_CTX_get_options(new_ctx));
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ex_data->servername = SSL_TEST_SERVERNAME_SERVER2;
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return 1;
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} else if (len == strlen("server1") &&
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strncmp(servername, "server1", len) == 0) {
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ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
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return 1;
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} else if (ignore) {
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ex_data->servername = SSL_TEST_SERVERNAME_SERVER1;
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return 1;
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}
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return 0;
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}
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/*
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* (RFC 6066):
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* If the server understood the ClientHello extension but
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@ -144,6 +205,50 @@ static int servername_reject_cb(SSL *s, int *ad, void *arg)
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return select_server_ctx(s, arg, 0);
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}
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static int early_ignore_cb(SSL *s, int *al, void *arg)
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{
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if (!early_select_server_ctx(s, arg, 1)) {
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*al = SSL_AD_UNRECOGNIZED_NAME;
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return 0;
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}
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return 1;
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}
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static int early_reject_cb(SSL *s, int *al, void *arg)
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{
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if (!early_select_server_ctx(s, arg, 0)) {
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*al = SSL_AD_UNRECOGNIZED_NAME;
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return 0;
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}
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return 1;
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}
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static int early_nov12_cb(SSL *s, int *al, void *arg)
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{
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int ret;
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unsigned int v;
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const unsigned char *p;
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v = SSL_early_get0_legacy_version(s);
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if (v > TLS1_2_VERSION || v < SSL3_VERSION) {
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*al = SSL_AD_PROTOCOL_VERSION;
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return 0;
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}
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(void)SSL_early_get0_session_id(s, &p);
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if (p == NULL ||
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SSL_early_get0_random(s, &p) == 0 ||
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SSL_early_get0_ciphers(s, &p) == 0 ||
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SSL_early_get0_compression_methods(s, &p) == 0) {
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*al = SSL_AD_INTERNAL_ERROR;
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return 0;
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}
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ret = early_select_server_ctx(s, arg, 0);
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SSL_set_max_proto_version(s, TLS1_1_VERSION);
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if (!ret)
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*al = SSL_AD_UNRECOGNIZED_NAME;
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return ret;
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}
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static unsigned char dummy_ocsp_resp_good_val = 0xff;
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static unsigned char dummy_ocsp_resp_bad_val = 0xfe;
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@ -337,7 +442,10 @@ static void configure_handshake_ctx(SSL_CTX *server_ctx, SSL_CTX *server2_ctx,
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break;
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}
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/* link the two contexts for SNI purposes */
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/*
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* Link the two contexts for SNI purposes.
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* Also do early callbacks here, as setting both early and SNI is bad.
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*/
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switch (extra->server.servername_callback) {
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case SSL_TEST_SERVERNAME_IGNORE_MISMATCH:
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SSL_CTX_set_tlsext_servername_callback(server_ctx, servername_ignore_cb);
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@ -349,6 +457,14 @@ static void configure_handshake_ctx(SSL_CTX *server_ctx, SSL_CTX *server2_ctx,
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break;
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case SSL_TEST_SERVERNAME_CB_NONE:
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break;
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case SSL_TEST_SERVERNAME_EARLY_IGNORE_MISMATCH:
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SSL_CTX_set_early_cb(server_ctx, early_ignore_cb, server2_ctx);
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break;
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case SSL_TEST_SERVERNAME_EARLY_REJECT_MISMATCH:
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SSL_CTX_set_early_cb(server_ctx, early_reject_cb, server2_ctx);
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break;
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case SSL_TEST_SERVERNAME_EARLY_NO_V12:
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SSL_CTX_set_early_cb(server_ctx, early_nov12_cb, server2_ctx);
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}
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if (extra->server.cert_status != SSL_TEST_CERT_STATUS_NONE) {
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@ -1,6 +1,6 @@
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# Generated with generate_ssl_tests.pl
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num_tests = 6
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num_tests = 9
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test-0 = 0-SNI-switch-context
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test-1 = 1-SNI-keep-context
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@ -8,6 +8,9 @@ test-2 = 2-SNI-no-server-support
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test-3 = 3-SNI-no-client-support
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test-4 = 4-SNI-bad-sni-ignore-mismatch
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test-5 = 5-SNI-bad-sni-reject-mismatch
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test-6 = 6-SNI-bad-early-sni-ignore-mismatch
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test-7 = 7-SNI-bad-early-sni-reject-mismatch
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test-8 = 8-SNI-early-disable-v12
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# ===========================================================
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[0-SNI-switch-context]
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@ -201,3 +204,105 @@ ServerNameCallback = RejectMismatch
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ServerName = invalid
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# ===========================================================
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[6-SNI-bad-early-sni-ignore-mismatch]
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ssl_conf = 6-SNI-bad-early-sni-ignore-mismatch-ssl
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[6-SNI-bad-early-sni-ignore-mismatch-ssl]
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server = 6-SNI-bad-early-sni-ignore-mismatch-server
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client = 6-SNI-bad-early-sni-ignore-mismatch-client
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server2 = 6-SNI-bad-early-sni-ignore-mismatch-server
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[6-SNI-bad-early-sni-ignore-mismatch-server]
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Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
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CipherString = DEFAULT
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PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
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[6-SNI-bad-early-sni-ignore-mismatch-client]
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CipherString = DEFAULT
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VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
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VerifyMode = Peer
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[test-6]
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ExpectedResult = Success
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ExpectedServerName = server1
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server = 6-SNI-bad-early-sni-ignore-mismatch-server-extra
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server2 = 6-SNI-bad-early-sni-ignore-mismatch-server-extra
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client = 6-SNI-bad-early-sni-ignore-mismatch-client-extra
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[6-SNI-bad-early-sni-ignore-mismatch-server-extra]
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ServerNameCallback = EarlyIgnoreMismatch
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[6-SNI-bad-early-sni-ignore-mismatch-client-extra]
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ServerName = invalid
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# ===========================================================
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[7-SNI-bad-early-sni-reject-mismatch]
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ssl_conf = 7-SNI-bad-early-sni-reject-mismatch-ssl
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[7-SNI-bad-early-sni-reject-mismatch-ssl]
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server = 7-SNI-bad-early-sni-reject-mismatch-server
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client = 7-SNI-bad-early-sni-reject-mismatch-client
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server2 = 7-SNI-bad-early-sni-reject-mismatch-server
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[7-SNI-bad-early-sni-reject-mismatch-server]
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Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
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CipherString = DEFAULT
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PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
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[7-SNI-bad-early-sni-reject-mismatch-client]
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CipherString = DEFAULT
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VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
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VerifyMode = Peer
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[test-7]
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ExpectedResult = ServerFail
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ExpectedServerAlert = UnrecognizedName
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server = 7-SNI-bad-early-sni-reject-mismatch-server-extra
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server2 = 7-SNI-bad-early-sni-reject-mismatch-server-extra
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client = 7-SNI-bad-early-sni-reject-mismatch-client-extra
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[7-SNI-bad-early-sni-reject-mismatch-server-extra]
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ServerNameCallback = EarlyRejectMismatch
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[7-SNI-bad-early-sni-reject-mismatch-client-extra]
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ServerName = invalid
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# ===========================================================
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[8-SNI-early-disable-v12]
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ssl_conf = 8-SNI-early-disable-v12-ssl
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[8-SNI-early-disable-v12-ssl]
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server = 8-SNI-early-disable-v12-server
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client = 8-SNI-early-disable-v12-client
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server2 = 8-SNI-early-disable-v12-server
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[8-SNI-early-disable-v12-server]
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Certificate = ${ENV::TEST_CERTS_DIR}/servercert.pem
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CipherString = DEFAULT
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PrivateKey = ${ENV::TEST_CERTS_DIR}/serverkey.pem
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[8-SNI-early-disable-v12-client]
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CipherString = DEFAULT
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VerifyCAFile = ${ENV::TEST_CERTS_DIR}/rootcert.pem
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VerifyMode = Peer
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[test-8]
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ExpectedProtocol = TLSv1.1
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ExpectedServerName = server2
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server = 8-SNI-early-disable-v12-server-extra
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server2 = 8-SNI-early-disable-v12-server-extra
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client = 8-SNI-early-disable-v12-client-extra
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[8-SNI-early-disable-v12-server-extra]
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ServerNameCallback = EarlyNoV12
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[8-SNI-early-disable-v12-client-extra]
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ServerName = server2
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@ -13,6 +13,7 @@ use strict;
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use warnings;
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package ssltests;
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use OpenSSL::Test::Utils;
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our @tests = (
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{
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@ -109,4 +110,60 @@ our @tests = (
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"ExpectedServerAlert" => "UnrecognizedName"
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},
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},
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{
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name => "SNI-bad-early-sni-ignore-mismatch",
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server => {
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extra => {
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"ServerNameCallback" => "EarlyIgnoreMismatch",
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},
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},
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client => {
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extra => {
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"ServerName" => "invalid",
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},
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},
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test => {
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"ExpectedServerName" => "server1",
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"ExpectedResult" => "Success"
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},
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},
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{
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name => "SNI-bad-early-sni-reject-mismatch",
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server => {
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extra => {
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"ServerNameCallback" => "EarlyRejectMismatch",
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},
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},
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client => {
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extra => {
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"ServerName" => "invalid",
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},
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},
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test => {
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"ExpectedResult" => "ServerFail",
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"ExpectedServerAlert" => "UnrecognizedName"
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},
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},
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);
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our @tests_tls_1_1 = (
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{
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name => "SNI-early-disable-v12",
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server => {
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extra => {
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"ServerNameCallback" => "EarlyNoV12",
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},
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},
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client => {
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extra => {
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"ServerName" => "server2",
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},
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},
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test => {
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"ExpectedProtocol" => "TLSv1.1",
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"ExpectedServerName" => "server2",
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},
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},
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);
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push @tests, @tests_tls_1_1 unless disabled("tls1_1");
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@ -237,6 +237,9 @@ static const test_enum ssl_servername_callbacks[] = {
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{"None", SSL_TEST_SERVERNAME_CB_NONE},
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{"IgnoreMismatch", SSL_TEST_SERVERNAME_IGNORE_MISMATCH},
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{"RejectMismatch", SSL_TEST_SERVERNAME_REJECT_MISMATCH},
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{"EarlyIgnoreMismatch", SSL_TEST_SERVERNAME_EARLY_IGNORE_MISMATCH},
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{"EarlyRejectMismatch", SSL_TEST_SERVERNAME_EARLY_REJECT_MISMATCH},
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{"EarlyNoV12", SSL_TEST_SERVERNAME_EARLY_NO_V12},
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};
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__owur static int parse_servername_callback(SSL_TEST_SERVER_CONF *server_conf,
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@ -38,7 +38,10 @@ typedef enum {
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typedef enum {
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SSL_TEST_SERVERNAME_CB_NONE = 0, /* Default */
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SSL_TEST_SERVERNAME_IGNORE_MISMATCH,
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SSL_TEST_SERVERNAME_REJECT_MISMATCH
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SSL_TEST_SERVERNAME_REJECT_MISMATCH,
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SSL_TEST_SERVERNAME_EARLY_IGNORE_MISMATCH,
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SSL_TEST_SERVERNAME_EARLY_REJECT_MISMATCH,
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SSL_TEST_SERVERNAME_EARLY_NO_V12
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} ssl_servername_callback_t;
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typedef enum {
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