Test creation of tickets when using a TLSv1.3 PSK

Add a test to check that we create the correct number of tickets after a
TLSv1.3 PSK.
Reviewed-by: NViktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7097)

test/sslapitest.c

@@ -24,6 +24,24 @@
 #include "internal/nelem.h"
 #include "../ssl/ssl_locl.h"
 
+#ifndef OPENSSL_NO_TLS1_3
+
+static SSL_SESSION *clientpsk = NULL;
+static SSL_SESSION *serverpsk = NULL;
+static const char *pskid = "Identity";
+static const char *srvid;
+
+static int use_session_cb(SSL *ssl, const EVP_MD *md, const unsigned char **id,
+                          size_t *idlen, SSL_SESSION **sess);
+static int find_session_cb(SSL *ssl, const unsigned char *identity,
+                           size_t identity_len, SSL_SESSION **sess);
+
+static int use_session_cb_cnt = 0;
+static int find_session_cb_cnt = 0;
+
+static SSL_SESSION *create_a_psk(SSL *ssl);
+#endif
+
 static char *cert = NULL;
 static char *privkey = NULL;
 static char *srpvfile = NULL;
@@ -1430,6 +1448,61 @@ static int test_stateful_tickets(int idx)
 {
     return test_tickets(1, idx);
 }
+
+static int test_psk_tickets(void)
+{
+    SSL_CTX *sctx = NULL, *cctx = NULL;
+    SSL *serverssl = NULL, *clientssl = NULL;
+    int testresult = 0;
+    int sess_id_ctx = 1;
+
+    if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(), TLS_client_method(),
+                                       TLS1_VERSION, TLS_MAX_VERSION, &sctx,
+                                       &cctx, NULL, NULL))
+            || !TEST_true(SSL_CTX_set_session_id_context(sctx,
+                                                         (void *)&sess_id_ctx,
+                                                         sizeof(sess_id_ctx))))
+        goto end;
+
+    SSL_CTX_set_session_cache_mode(cctx, SSL_SESS_CACHE_CLIENT
+                                         | SSL_SESS_CACHE_NO_INTERNAL_STORE);
+    SSL_CTX_set_psk_use_session_callback(cctx, use_session_cb);
+    SSL_CTX_set_psk_find_session_callback(sctx, find_session_cb);
+    SSL_CTX_sess_set_new_cb(cctx, new_session_cb);
+    use_session_cb_cnt = 0;
+    find_session_cb_cnt = 0;
+    srvid = pskid;
+    new_called = 0;
+
+    if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
+                                      NULL, NULL)))
+        goto end;
+    clientpsk = serverpsk = create_a_psk(clientssl);
+    if (!TEST_ptr(clientpsk))
+        goto end;
+    SSL_SESSION_up_ref(clientpsk);
+
+    if (!TEST_true(create_ssl_connection(serverssl, clientssl,
+                                                SSL_ERROR_NONE))
+            || !TEST_int_eq(1, find_session_cb_cnt)
+            || !TEST_int_eq(1, use_session_cb_cnt)
+               /* We should always get 1 ticket when using external PSK */
+            || !TEST_int_eq(1, new_called))
+        goto end;
+
+    testresult = 1;
+
+ end:
+    SSL_free(serverssl);
+    SSL_free(clientssl);
+    SSL_CTX_free(sctx);
+    SSL_CTX_free(cctx);
+    SSL_SESSION_free(clientpsk);
+    SSL_SESSION_free(serverpsk);
+    clientpsk = serverpsk = NULL;
+
+    return testresult;
+}
 #endif
 
 #define USE_NULL            0
@@ -1806,14 +1879,6 @@ static int test_set_sigalgs(int idx)
 #endif
 
 #ifndef OPENSSL_NO_TLS1_3
-
-static SSL_SESSION *clientpsk = NULL;
-static SSL_SESSION *serverpsk = NULL;
-static const char *pskid = "Identity";
-static const char *srvid;
-
-static int use_session_cb_cnt = 0;
-static int find_session_cb_cnt = 0;
 static int psk_client_cb_cnt = 0;
 static int psk_server_cb_cnt = 0;
 
@@ -1944,6 +2009,35 @@ static unsigned int psk_server_cb(SSL *ssl, const char *identity,
 #define TLS13_AES_256_GCM_SHA384_BYTES  ((const unsigned char *)"\x13\x02")
 #define TLS13_AES_128_GCM_SHA256_BYTES  ((const unsigned char *)"\x13\x01")
 
+
+static SSL_SESSION *create_a_psk(SSL *ssl)
+{
+    const SSL_CIPHER *cipher = NULL;
+    const unsigned char key[] = {
+        0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
+        0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
+        0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
+        0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
+        0x2c, 0x2d, 0x2e, 0x2f
+    };
+    SSL_SESSION *sess = NULL;
+
+    cipher = SSL_CIPHER_find(ssl, TLS13_AES_256_GCM_SHA384_BYTES);
+    sess = SSL_SESSION_new();
+    if (!TEST_ptr(sess)
+            || !TEST_ptr(cipher)
+            || !TEST_true(SSL_SESSION_set1_master_key(sess, key,
+                                                      sizeof(key)))
+            || !TEST_true(SSL_SESSION_set_cipher(sess, cipher))
+            || !TEST_true(
+                    SSL_SESSION_set_protocol_version(sess,
+                                                     TLS1_3_VERSION))) {
+        SSL_SESSION_free(sess);
+        return NULL;
+    }
+    return sess;
+}
+
 /*
  * Helper method to setup objects for early data test. Caller frees objects on
  * error.
@@ -1989,26 +2083,8 @@ static int setupearly_data_test(SSL_CTX **cctx, SSL_CTX **sctx, SSL **clientssl,
         return 0;
 
     if (idx == 2) {
-        /* Create the PSK */
-        const SSL_CIPHER *cipher = NULL;
-        const unsigned char key[] = {
-            0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
-            0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
-            0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
-            0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
-            0x2c, 0x2d, 0x2e, 0x2f
-        };
-
-        cipher = SSL_CIPHER_find(*clientssl, TLS13_AES_256_GCM_SHA384_BYTES);
-        clientpsk = SSL_SESSION_new();
+        clientpsk = create_a_psk(*clientssl);
         if (!TEST_ptr(clientpsk)
-                || !TEST_ptr(cipher)
-                || !TEST_true(SSL_SESSION_set1_master_key(clientpsk, key,
-                                                          sizeof(key)))
-                || !TEST_true(SSL_SESSION_set_cipher(clientpsk, cipher))
-                || !TEST_true(
-                        SSL_SESSION_set_protocol_version(clientpsk,
-                                                         TLS1_3_VERSION))
                    /*
                     * We just choose an arbitrary value for max_early_data which
                     * should be big enough for testing purposes.
@@ -5426,6 +5502,7 @@ int setup_tests(void)
 #ifndef OPENSSL_NO_TLS1_3
     ADD_ALL_TESTS(test_stateful_tickets, 3);
     ADD_ALL_TESTS(test_stateless_tickets, 3);
+    ADD_TEST(test_psk_tickets);
 #endif
     ADD_ALL_TESTS(test_ssl_set_bio, TOTAL_SSL_SET_BIO_TESTS);
     ADD_TEST(test_ssl_bio_pop_next_bio);