sslapitest.c

    if (initrbio == USE_BIO_1
            || initwbio == USE_BIO_1
            || newrbio == USE_BIO_1
            || newwbio == USE_BIO_1) {
        if (!TEST_ptr(bio1 = BIO_new(BIO_s_mem())))
            goto end;
    }

    if (initrbio == USE_BIO_2
            || initwbio == USE_BIO_2
            || newrbio == USE_BIO_2
            || newwbio == USE_BIO_2) {
        if (!TEST_ptr(bio2 = BIO_new(BIO_s_mem())))
            goto end;
    }

    setupbio(&irbio, bio1, bio2, initrbio);
    setupbio(&iwbio, bio1, bio2, initwbio);

    /*
     * We want to maintain our own refs to these BIO, so do an up ref for each
     * BIO that will have ownership transferred in the SSL_set_bio() call
     */
    if (irbio != NULL)
        BIO_up_ref(irbio);
    if (iwbio != NULL && iwbio != irbio)
        BIO_up_ref(iwbio);

    SSL_set_bio(ssl, irbio, iwbio);

    setupbio(&nrbio, bio1, bio2, newrbio);
    setupbio(&nwbio, bio1, bio2, newwbio);

    /*
     * We will (maybe) transfer ownership again so do more up refs.
     * SSL_set_bio() has some really complicated ownership rules where BIOs have
     * already been set!
     */
    if (nrbio != NULL
            && nrbio != irbio
            && (nwbio != iwbio || nrbio != nwbio))
        BIO_up_ref(nrbio);
    if (nwbio != NULL
            && nwbio != nrbio
            && (nwbio != iwbio || (nwbio == iwbio && irbio == iwbio)))
        BIO_up_ref(nwbio);

    SSL_set_bio(ssl, nrbio, nwbio);

    testresult = 1;

 end:
    SSL_free(ssl);
    BIO_free(bio1);
    BIO_free(bio2);

    /*
     * This test is checking that the ref counting for SSL_set_bio is correct.
     * If we get here and we did too many frees then we will fail in the above
     * functions. If we haven't done enough then this will only be detected in
     * a crypto-mdebug build
     */
    SSL_CTX_free(ctx);
    return testresult;
}

typedef struct ssl_bio_test_fixture {
    const char *test_case_name;
    int pop_ssl;
    enum { NO_BIO_CHANGE, CHANGE_RBIO, CHANGE_WBIO } change_bio;
} SSL_BIO_TEST_FIXTURE;

static SSL_BIO_TEST_FIXTURE ssl_bio_set_up(const char *const test_case_name)
{
    SSL_BIO_TEST_FIXTURE fixture;

    fixture.test_case_name = test_case_name;
    fixture.pop_ssl = 0;
    fixture.change_bio = NO_BIO_CHANGE;
    return fixture;
}

static void ssl_bio_tear_down(SSL_BIO_TEST_FIXTURE fixture)
{
}

static int execute_test_ssl_bio(SSL_BIO_TEST_FIXTURE fix)
{
    BIO *sslbio = NULL, *membio1 = NULL, *membio2 = NULL;
    SSL_CTX *ctx;
    SSL *ssl = NULL;
    int testresult = 0;

    if (!TEST_ptr(ctx = SSL_CTX_new(TLS_method()))
            || !TEST_ptr(ssl = SSL_new(ctx))
            || !TEST_ptr(sslbio = BIO_new(BIO_f_ssl()))
            || !TEST_ptr(membio1 = BIO_new(BIO_s_mem())))
        goto end;

    BIO_set_ssl(sslbio, ssl, BIO_CLOSE);

    /*
     * If anything goes wrong here then we could leak memory, so this will
     * be caught in a crypto-mdebug build
     */
    BIO_push(sslbio, membio1);

    /* Verify changing the rbio/wbio directly does not cause leaks */
    if (fix.change_bio != NO_BIO_CHANGE) {
        if (!TEST_ptr(membio2 = BIO_new(BIO_s_mem())))
            goto end;
        if (fix.change_bio == CHANGE_RBIO)
            SSL_set0_rbio(ssl, membio2);
        else
            SSL_set0_wbio(ssl, membio2);
    }
    ssl = NULL;

    if (fix.pop_ssl)
        BIO_pop(sslbio);
    else
        BIO_pop(membio1);

    testresult = 1;
 end:
    BIO_free(membio1);
    BIO_free(sslbio);
    SSL_free(ssl);
    SSL_CTX_free(ctx);

    return testresult;
}

static int test_ssl_bio_pop_next_bio(void)
{
    SETUP_TEST_FIXTURE(SSL_BIO_TEST_FIXTURE, ssl_bio_set_up);
    EXECUTE_TEST(execute_test_ssl_bio, ssl_bio_tear_down);
}

static int test_ssl_bio_pop_ssl_bio(void)
{
    SETUP_TEST_FIXTURE(SSL_BIO_TEST_FIXTURE, ssl_bio_set_up);
    fixture.pop_ssl = 1;
    EXECUTE_TEST(execute_test_ssl_bio, ssl_bio_tear_down);
}

static int test_ssl_bio_change_rbio(void)
{
    SETUP_TEST_FIXTURE(SSL_BIO_TEST_FIXTURE, ssl_bio_set_up);
    fixture.change_bio = CHANGE_RBIO;
    EXECUTE_TEST(execute_test_ssl_bio, ssl_bio_tear_down);
}

static int test_ssl_bio_change_wbio(void)
{
    SETUP_TEST_FIXTURE(SSL_BIO_TEST_FIXTURE, ssl_bio_set_up);
    fixture.change_bio = CHANGE_WBIO;
    EXECUTE_TEST(execute_test_ssl_bio, ssl_bio_tear_down);
}

typedef struct {
    /* The list of sig algs */
    const int *list;
    /* The length of the list */
    size_t listlen;
    /* A sigalgs list in string format */
    const char *liststr;
    /* Whether setting the list should succeed */
    int valid;
    /* Whether creating a connection with the list should succeed */
    int connsuccess;
} sigalgs_list;

static const int validlist1[] = {NID_sha256, EVP_PKEY_RSA};
#ifndef OPENSSL_NO_EC
static const int validlist2[] = {NID_sha256, EVP_PKEY_RSA, NID_sha512, EVP_PKEY_EC};
static const int validlist3[] = {NID_sha512, EVP_PKEY_EC};
#endif
static const int invalidlist1[] = {NID_undef, EVP_PKEY_RSA};
static const int invalidlist2[] = {NID_sha256, NID_undef};
static const int invalidlist3[] = {NID_sha256, EVP_PKEY_RSA, NID_sha256};
static const int invalidlist4[] = {NID_sha256};
static const sigalgs_list testsigalgs[] = {
    {validlist1, OSSL_NELEM(validlist1), NULL, 1, 1},
#ifndef OPENSSL_NO_EC
    {validlist2, OSSL_NELEM(validlist2), NULL, 1, 1},
    {validlist3, OSSL_NELEM(validlist3), NULL, 1, 0},
#endif
    {NULL, 0, "RSA+SHA256", 1, 1},
#ifndef OPENSSL_NO_EC
    {NULL, 0, "RSA+SHA256:ECDSA+SHA512", 1, 1},
    {NULL, 0, "ECDSA+SHA512", 1, 0},
#endif
    {invalidlist1, OSSL_NELEM(invalidlist1), NULL, 0, 0},
    {invalidlist2, OSSL_NELEM(invalidlist2), NULL, 0, 0},
    {invalidlist3, OSSL_NELEM(invalidlist3), NULL, 0, 0},
    {invalidlist4, OSSL_NELEM(invalidlist4), NULL, 0, 0},
    {NULL, 0, "RSA", 0, 0},
    {NULL, 0, "SHA256", 0, 0},
    {NULL, 0, "RSA+SHA256:SHA256", 0, 0},
    {NULL, 0, "Invalid", 0, 0}
};

static int test_set_sigalgs(int idx)
{
    SSL_CTX *cctx = NULL, *sctx = NULL;
    SSL *clientssl = NULL, *serverssl = NULL;
    int testresult = 0;
    const sigalgs_list *curr;
    int testctx;

    /* Should never happen */
    if (!TEST_size_t_le((size_t)idx, OSSL_NELEM(testsigalgs) * 2))
        return 0;

    testctx = ((size_t)idx < OSSL_NELEM(testsigalgs));
    curr = testctx ? &testsigalgs[idx]
                   : &testsigalgs[idx - OSSL_NELEM(testsigalgs)];

    if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(),
                                       TLS_client_method(), &sctx,
                                       &cctx, cert, privkey)))
        return 0;

    /*
     * TODO(TLS1.3): These APIs cannot set TLSv1.3 sig algs so we just test it
     * for TLSv1.2 for now until we add a new API.
     */
    SSL_CTX_set_max_proto_version(cctx, TLS1_2_VERSION);

    if (testctx) {
        int ret;

        if (curr->list != NULL)
            ret = SSL_CTX_set1_sigalgs(cctx, curr->list, curr->listlen);
        else
            ret = SSL_CTX_set1_sigalgs_list(cctx, curr->liststr);

        if (!ret) {
            if (curr->valid)
                TEST_info("Failure setting sigalgs in SSL_CTX (%d)\n", idx);
            else
                testresult = 1;
            goto end;
        }
        if (!curr->valid) {
            TEST_info("Not-failed setting sigalgs in SSL_CTX (%d)\n", idx);
            goto end;
        }
    }

    if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl,
                                      &clientssl, NULL, NULL)))
        goto end;

    if (!testctx) {
        int ret;

        if (curr->list != NULL)
            ret = SSL_set1_sigalgs(clientssl, curr->list, curr->listlen);
        else
            ret = SSL_set1_sigalgs_list(clientssl, curr->liststr);
        if (!ret) {
            if (curr->valid)
                TEST_info("Failure setting sigalgs in SSL (%d)\n", idx);
            else
                testresult = 1;
            goto end;
        }
        if (!curr->valid)
            goto end;
    }

    if (!TEST_int_eq(create_ssl_connection(serverssl, clientssl,
                                           SSL_ERROR_NONE),
                curr->connsuccess))
        goto end;

    testresult = 1;

 end:
    SSL_free(serverssl);
    SSL_free(clientssl);
    SSL_CTX_free(sctx);
    SSL_CTX_free(cctx);

    return testresult;
}

#ifndef OPENSSL_NO_TLS1_3

#define MSG1    "Hello"
#define MSG2    "World."
#define MSG3    "This"
#define MSG4    "is"
#define MSG5    "a"
#define MSG6    "test"
#define MSG7    "message."

/*
 * Helper method to setup objects for early data test. Caller frees objects on
 * error.
 */
static int setupearly_data_test(SSL_CTX **cctx, SSL_CTX **sctx, SSL **clientssl,
                                SSL **serverssl, SSL_SESSION **sess, int idx)
{
    if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(),
                                       TLS_client_method(), sctx,
                                       cctx, cert, privkey)))
        return 0;

    /* When idx == 1 we repeat the tests with read_ahead set */
    if (idx > 0) {
        SSL_CTX_set_read_ahead(*cctx, 1);
        SSL_CTX_set_read_ahead(*sctx, 1);
    }

    if (!TEST_true(create_ssl_objects(*sctx, *cctx, serverssl, clientssl,
                                      NULL, NULL))
            || !TEST_true(create_ssl_connection(*serverssl, *clientssl,
                                                SSL_ERROR_NONE)))
        return 0;

    *sess = SSL_get1_session(*clientssl);
    SSL_shutdown(*clientssl);
    SSL_shutdown(*serverssl);
    SSL_free(*serverssl);
    SSL_free(*clientssl);
    *serverssl = *clientssl = NULL;

    if (!TEST_true(create_ssl_objects(*sctx, *cctx, serverssl,
                                      clientssl, NULL, NULL))
            || !TEST_true(SSL_set_session(*clientssl, *sess)))
        return 0;

    return 1;
}

static int test_early_data_read_write(int idx)
{
    SSL_CTX *cctx = NULL, *sctx = NULL;
    SSL *clientssl = NULL, *serverssl = NULL;
    int testresult = 0;
    SSL_SESSION *sess = NULL;
    unsigned char buf[20], data[1024];
    size_t readbytes, written, eoedlen, rawread, rawwritten;
    BIO *rbio;

    if (!TEST_true(setupearly_data_test(&cctx, &sctx, &clientssl,
                                        &serverssl, &sess, idx)))
        goto end;

    /* Write and read some early data */
    if (!TEST_true(SSL_write_early_data(clientssl, MSG1, strlen(MSG1),
                                        &written))
            || !TEST_size_t_eq(written, strlen(MSG1))
            || !TEST_int_eq(SSL_read_early_data(serverssl, buf,
                                                sizeof(buf), &readbytes),
                            SSL_READ_EARLY_DATA_SUCCESS)
            || !TEST_mem_eq(MSG1, readbytes, buf, strlen(MSG1))
            || !TEST_int_eq(SSL_get_early_data_status(serverssl),
                            SSL_EARLY_DATA_ACCEPTED))
        goto end;

    /*
     * Server should be able to write data, and client should be able to
     * read it.
     */
    if (!TEST_true(SSL_write_early_data(serverssl, MSG2, strlen(MSG2),
                                        &written))
            || !TEST_size_t_eq(written, strlen(MSG2))
            || !TEST_true(SSL_read_ex(clientssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG2, strlen(MSG2)))
        goto end;

    /* Even after reading normal data, client should be able write early data */
    if (!TEST_true(SSL_write_early_data(clientssl, MSG3, strlen(MSG3),
                                        &written))
            || !TEST_size_t_eq(written, strlen(MSG3)))
        goto end;

    /* Server should still be able read early data after writing data */
    if (!TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                         &readbytes),
                     SSL_READ_EARLY_DATA_SUCCESS)
            || !TEST_mem_eq(buf, readbytes, MSG3, strlen(MSG3)))
        goto end;

    /* Write more data from server and read it from client */
    if (!TEST_true(SSL_write_early_data(serverssl, MSG4, strlen(MSG4),
                                        &written))
            || !TEST_size_t_eq(written, strlen(MSG4))
            || !TEST_true(SSL_read_ex(clientssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG4, strlen(MSG4)))
        goto end;

    /*
     * If client writes normal data it should mean writing early data is no
     * longer possible.
     */
    if (!TEST_true(SSL_write_ex(clientssl, MSG5, strlen(MSG5), &written))
            || !TEST_size_t_eq(written, strlen(MSG5))
            || !TEST_int_eq(SSL_get_early_data_status(clientssl),
                            SSL_EARLY_DATA_ACCEPTED))
        goto end;

    /*
     * At this point the client has written EndOfEarlyData, ClientFinished and
     * normal (fully protected) data. We are going to cause a delay between the
     * arrival of EndOfEarlyData and ClientFinished. We read out all the data
     * in the read BIO, and then just put back the EndOfEarlyData message.
     */
    rbio = SSL_get_rbio(serverssl);
    if (!TEST_true(BIO_read_ex(rbio, data, sizeof(data), &rawread))
            || !TEST_size_t_lt(rawread, sizeof(data))
            || !TEST_size_t_gt(rawread, SSL3_RT_HEADER_LENGTH))
        goto end;

    /* Record length is in the 4th and 5th bytes of the record header */
    eoedlen = SSL3_RT_HEADER_LENGTH + (data[3] << 8 | data[4]);
    if (!TEST_true(BIO_write_ex(rbio, data, eoedlen, &rawwritten))
            || !TEST_size_t_eq(rawwritten, eoedlen))
        goto end;

    /* Server should be told that there is no more early data */
    if (!TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                         &readbytes),
                     SSL_READ_EARLY_DATA_FINISH)
            || !TEST_size_t_eq(readbytes, 0))
        goto end;

    /*
     * Server has not finished init yet, so should still be able to write early
     * data.
     */
    if (!TEST_true(SSL_write_early_data(serverssl, MSG6, strlen(MSG6),
                                        &written))
            || !TEST_size_t_eq(written, strlen(MSG6)))
        goto end;

    /* Push the ClientFinished and the normal data back into the server rbio */
    if (!TEST_true(BIO_write_ex(rbio, data + eoedlen, rawread - eoedlen,
                                &rawwritten))
            || !TEST_size_t_eq(rawwritten, rawread - eoedlen))
        goto end;

    /* Server should be able to read normal data */
    if (!TEST_true(SSL_read_ex(serverssl, buf, sizeof(buf), &readbytes))
            || !TEST_size_t_eq(readbytes, strlen(MSG5)))
        goto end;

    /* Client and server should not be able to write/read early data now */
    if (!TEST_false(SSL_write_early_data(clientssl, MSG6, strlen(MSG6),
                                         &written)))
        goto end;
    ERR_clear_error();
    if (!TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                         &readbytes),
                     SSL_READ_EARLY_DATA_ERROR))
        goto end;
    ERR_clear_error();

    /* Client should be able to read the data sent by the server */
    if (!TEST_true(SSL_read_ex(clientssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG6, strlen(MSG6)))
        goto end;

    /*
     * Make sure we process the NewSessionTicket. This arrives post-handshake.
     * We attempt a read which we do not expect to return any data.
     */
    if (!TEST_false(SSL_read_ex(clientssl, buf, sizeof(buf), &readbytes)))
        goto end;

    /* Server should be able to write normal data */
    if (!TEST_true(SSL_write_ex(serverssl, MSG7, strlen(MSG7), &written))
            || !TEST_size_t_eq(written, strlen(MSG7))
            || !TEST_true(SSL_read_ex(clientssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG7, strlen(MSG7)))
        goto end;

    SSL_SESSION_free(sess);
    sess = SSL_get1_session(clientssl);

    SSL_shutdown(clientssl);
    SSL_shutdown(serverssl);
    SSL_free(serverssl);
    SSL_free(clientssl);
    serverssl = clientssl = NULL;
    if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl,
                                      &clientssl, NULL, NULL))
            || !TEST_true(SSL_set_session(clientssl, sess)))
        goto end;

    /* Write and read some early data */
    if (!TEST_true(SSL_write_early_data(clientssl, MSG1, strlen(MSG1),
                                        &written))
            || !TEST_size_t_eq(written, strlen(MSG1))
            || !TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                                &readbytes),
                            SSL_READ_EARLY_DATA_SUCCESS)
            || !TEST_mem_eq(buf, readbytes, MSG1, strlen(MSG1)))
        goto end;

    if (!TEST_int_gt(SSL_connect(clientssl), 0)
            || !TEST_int_gt(SSL_accept(serverssl), 0))
        goto end;

    /* Client and server should not be able to write/read early data now */
    if (!TEST_false(SSL_write_early_data(clientssl, MSG6, strlen(MSG6),
                                         &written)))
        goto end;
    ERR_clear_error();
    if (!TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                         &readbytes),
                     SSL_READ_EARLY_DATA_ERROR))
        goto end;
    ERR_clear_error();

    /* Client and server should be able to write/read normal data */
    if (!TEST_true(SSL_write_ex(clientssl, MSG5, strlen(MSG5), &written))
            || !TEST_size_t_eq(written, strlen(MSG5))
            || !TEST_true(SSL_read_ex(serverssl, buf, sizeof(buf), &readbytes))
            || !TEST_size_t_eq(readbytes, strlen(MSG5)))
        goto end;

    testresult = 1;

 end:
    SSL_SESSION_free(sess);
    SSL_free(serverssl);
    SSL_free(clientssl);
    SSL_CTX_free(sctx);
    SSL_CTX_free(cctx);
    return testresult;
}

/*
 * Test that a server attempting to read early data can handle a connection
 * from a client where the early data is not acceptable.
 */
static int test_early_data_skip(int idx)
{
    SSL_CTX *cctx = NULL, *sctx = NULL;
    SSL *clientssl = NULL, *serverssl = NULL;
    int testresult = 0;
    SSL_SESSION *sess = NULL;
    unsigned char buf[20];
    size_t readbytes, written;

    if (!TEST_true(setupearly_data_test(&cctx, &sctx, &clientssl,
                                        &serverssl, &sess, idx)))
        goto end;

    /*
     * Deliberately corrupt the creation time. We take 20 seconds off the time.
     * It could be any value as long as it is not within tolerance. This should
     * mean the ticket is rejected.
     */
    if (!TEST_true(SSL_SESSION_set_time(sess, time(NULL) - 20)))
        goto end;

    /* Write some early data */
    if (!TEST_true(SSL_write_early_data(clientssl, MSG1, strlen(MSG1),
                                        &written))
            || !TEST_size_t_eq(written, strlen(MSG1)))
        goto end;

    /* Server should reject the early data and skip over it */
    if (!TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                         &readbytes),
                     SSL_READ_EARLY_DATA_FINISH)
            || !TEST_size_t_eq(readbytes, 0)
            || !TEST_int_eq(SSL_get_early_data_status(serverssl),
                            SSL_EARLY_DATA_REJECTED))
        goto end;

    /* Should be able to send normal data despite rejection of early data */
    if (!TEST_true(SSL_write_ex(clientssl, MSG2, strlen(MSG2), &written))
            || !TEST_size_t_eq(written, strlen(MSG2))
            || !TEST_int_eq(SSL_get_early_data_status(clientssl),
                            SSL_EARLY_DATA_REJECTED)
            || !TEST_true(SSL_read_ex(serverssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG2, strlen(MSG2)))
        goto end;

    testresult = 1;

 end:
    SSL_SESSION_free(sess);
    SSL_free(serverssl);
    SSL_free(clientssl);
    SSL_CTX_free(sctx);
    SSL_CTX_free(cctx);
    return testresult;
}

/*
 * Test that a server attempting to read early data can handle a connection
 * from a client that doesn't send any.
 */
static int test_early_data_not_sent(int idx)
{
    SSL_CTX *cctx = NULL, *sctx = NULL;
    SSL *clientssl = NULL, *serverssl = NULL;
    int testresult = 0;
    SSL_SESSION *sess = NULL;
    unsigned char buf[20];
    size_t readbytes, written;

    if (!TEST_true(setupearly_data_test(&cctx, &sctx, &clientssl,
                                        &serverssl, &sess, idx)))
        goto end;

    /* Write some data - should block due to handshake with server */
    SSL_set_connect_state(clientssl);
    if (!TEST_false(SSL_write_ex(clientssl, MSG1, strlen(MSG1), &written)))
        goto end;

    /* Server should detect that early data has not been sent */
    if (!TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                         &readbytes),
                     SSL_READ_EARLY_DATA_FINISH)
            || !TEST_size_t_eq(readbytes, 0)
            || !TEST_int_eq(SSL_get_early_data_status(serverssl),
                            SSL_EARLY_DATA_NOT_SENT)
            || !TEST_int_eq(SSL_get_early_data_status(clientssl),
                            SSL_EARLY_DATA_NOT_SENT))
        goto end;

    /* Continue writing the message we started earlier */
    if (!TEST_true(SSL_write_ex(clientssl, MSG1, strlen(MSG1), &written))
            || !TEST_size_t_eq(written, strlen(MSG1))
            || !TEST_true(SSL_read_ex(serverssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG1, strlen(MSG1))
            || !SSL_write_ex(serverssl, MSG2, strlen(MSG2), &written)
            || !TEST_size_t_eq(written, strlen(MSG2)))
        goto end;

    /*
     * Should block due to the NewSessionTicket arrival unless we're using
     * read_ahead
     */
    if (idx == 0) {
        if (!TEST_false(SSL_read_ex(clientssl, buf, sizeof(buf), &readbytes)))
            goto end;
    }

    if (!TEST_true(SSL_read_ex(clientssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG2, strlen(MSG2)))
        goto end;

    testresult = 1;

 end:
    SSL_SESSION_free(sess);
    SSL_free(serverssl);
    SSL_free(clientssl);
    SSL_CTX_free(sctx);
    SSL_CTX_free(cctx);
    return testresult;
}

/*
 * Test that a server that doesn't try to read early data can handle a
 * client sending some.
 */
static int test_early_data_not_expected(int idx)
{
    SSL_CTX *cctx = NULL, *sctx = NULL;
    SSL *clientssl = NULL, *serverssl = NULL;
    int testresult = 0;
    SSL_SESSION *sess = NULL;
    unsigned char buf[20];
    size_t readbytes, written;


    if (!TEST_true(setupearly_data_test(&cctx, &sctx, &clientssl,
                                        &serverssl, &sess, idx)))
        goto end;

    /* Write some early data */
    if (!TEST_true(SSL_write_early_data(clientssl, MSG1, strlen(MSG1),
                                        &written)))
        goto end;

    /*
     * Server should skip over early data and then block waiting for client to
     * continue handshake
     */
    if (!TEST_int_le(SSL_accept(serverssl), 0)
     || !TEST_int_gt(SSL_connect(clientssl), 0)
     || !TEST_int_eq(SSL_get_early_data_status(serverssl),
                     SSL_EARLY_DATA_REJECTED)
     || !TEST_int_gt(SSL_accept(serverssl), 0)
     || !TEST_int_eq(SSL_get_early_data_status(clientssl),
                     SSL_EARLY_DATA_REJECTED))
        goto end;

    /* Send some normal data from client to server */
    if (!TEST_true(SSL_write_ex(clientssl, MSG2, strlen(MSG2), &written))
            || !TEST_size_t_eq(written, strlen(MSG2)))
        goto end;

    if (!TEST_true(SSL_read_ex(serverssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG2, strlen(MSG2)))
        goto end;

    testresult = 1;

 end:
    SSL_SESSION_free(sess);
    SSL_free(serverssl);
    SSL_free(clientssl);
    SSL_CTX_free(sctx);
    SSL_CTX_free(cctx);
    return testresult;
}


# ifndef OPENSSL_NO_TLS1_2
/*
 * Test that a server attempting to read early data can handle a connection
 * from a TLSv1.2 client.
 */
static int test_early_data_tls1_2(int idx)
{
    SSL_CTX *cctx = NULL, *sctx = NULL;
    SSL *clientssl = NULL, *serverssl = NULL;
    int testresult = 0;
    unsigned char buf[20];
    size_t readbytes, written;

    if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(),
                                       TLS_client_method(), &sctx,
                                       &cctx, cert, privkey)))
        goto end;

    /* When idx == 1 we repeat the tests with read_ahead set */
    if (idx > 0) {
        SSL_CTX_set_read_ahead(cctx, 1);
        SSL_CTX_set_read_ahead(sctx, 1);
    }

    if (!TEST_true(create_ssl_objects(sctx, cctx, &serverssl,
                                      &clientssl, NULL, NULL)))
        goto end;

    /* Write some data - should block due to handshake with server */
    SSL_set_max_proto_version(clientssl, TLS1_2_VERSION);
    SSL_set_connect_state(clientssl);
    if (!TEST_false(SSL_write_ex(clientssl, MSG1, strlen(MSG1), &written)))
        goto end;

    /*
     * Server should do TLSv1.2 handshake. First it will block waiting for more
     * messages from client after ServerDone. Then SSL_read_early_data should
     * finish and detect that early data has not been sent
     */
    if (!TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                         &readbytes),
                     SSL_READ_EARLY_DATA_ERROR))
        goto end;

    /*
     * Continue writing the message we started earlier. Will still block waiting
     * for the CCS/Finished from server
     */
    if (!TEST_false(SSL_write_ex(clientssl, MSG1, strlen(MSG1), &written))
            || !TEST_int_eq(SSL_read_early_data(serverssl, buf, sizeof(buf),
                                                &readbytes),
                            SSL_READ_EARLY_DATA_FINISH)
            || !TEST_size_t_eq(readbytes, 0)
            || !TEST_int_eq(SSL_get_early_data_status(serverssl),
                            SSL_EARLY_DATA_NOT_SENT))
        goto end;

    /* Continue writing the message we started earlier */
    if (!TEST_true(SSL_write_ex(clientssl, MSG1, strlen(MSG1), &written))
            || !TEST_size_t_eq(written, strlen(MSG1))
            || !TEST_int_eq(SSL_get_early_data_status(clientssl),
                            SSL_EARLY_DATA_NOT_SENT)
            || !TEST_true(SSL_read_ex(serverssl, buf, sizeof(buf), &readbytes))
            || !TEST_mem_eq(buf, readbytes, MSG1, strlen(MSG1))
            || !TEST_true(SSL_write_ex(serverssl, MSG2, strlen(MSG2), &written))
            || !TEST_size_t_eq(written, strlen(MSG2))
            || !SSL_read_ex(clientssl, buf, sizeof(buf), &readbytes)
            || !TEST_mem_eq(buf, readbytes, MSG2, strlen(MSG2)))
        goto end;

    testresult = 1;

 end:
    SSL_free(serverssl);
    SSL_free(clientssl);
    SSL_CTX_free(sctx);
    SSL_CTX_free(cctx);

    return testresult;
}
# endif /* OPENSSL_NO_TLS1_2 */

static int test_ciphersuite_change(void)
{
    SSL_CTX *cctx = NULL, *sctx = NULL;
    SSL *clientssl = NULL, *serverssl = NULL;
    SSL_SESSION *clntsess = NULL;
    int testresult = 0;
    const SSL_CIPHER *aes_128_gcm_sha256 = NULL;

    /* Create a session based on SHA-256 */
    if (!TEST_true(create_ssl_ctx_pair(TLS_server_method(),
                                       TLS_client_method(), &sctx,
                                       &cctx, cert, privkey))
            || !TEST_true(SSL_CTX_set_cipher_list(cctx,
                                                  "TLS13-AES-128-GCM-SHA256"))
            || !TEST_true(create_ssl_objects(sctx, cctx, &serverssl,
                                          &clientssl, NULL, NULL))
            || !TEST_true(create_ssl_connection(serverssl, clientssl,
                                                SSL_ERROR_NONE)))
        goto end;

    clntsess = SSL_get1_session(clientssl);
    /* Save for later */
    aes_128_gcm_sha256 = SSL_SESSION_get0_cipher(clntsess);
    SSL_shutdown(clientssl);
    SSL_shutdown(serverssl);
    SSL_free(serverssl);
    SSL_free(clientssl);
    serverssl = clientssl = NULL;

    /* Check we can resume a session with a different SHA-256 ciphersuite */
    if (!TEST_true(SSL_CTX_set_cipher_list(cctx,
                                           "TLS13-CHACHA20-POLY1305-SHA256"))
            || !TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
                                             NULL, NULL))
            || !TEST_true(SSL_set_session(clientssl, clntsess))
            || !TEST_true(create_ssl_connection(serverssl, clientssl,
                                                SSL_ERROR_NONE))
            || !TEST_true(SSL_session_reused(clientssl)))
        goto end;

    SSL_SESSION_free(clntsess);
    clntsess = SSL_get1_session(clientssl);
    SSL_shutdown(clientssl);
    SSL_shutdown(serverssl);
    SSL_free(serverssl);
    SSL_free(clientssl);
    serverssl = clientssl = NULL;

    /*
     * Check attempting to resume a SHA-256 session with no SHA-256 ciphersuites
     * succeeds but does not resume.
     */
    if (!TEST_true(SSL_CTX_set_cipher_list(cctx, "TLS13-AES-256-GCM-SHA384"))
            || !TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
                                             NULL, NULL))
            || !TEST_true(SSL_set_session(clientssl, clntsess))
            || !TEST_true(create_ssl_connection(serverssl, clientssl,
                                                SSL_ERROR_SSL))
            || !TEST_false(SSL_session_reused(clientssl)))
        goto end;

    SSL_SESSION_free(clntsess);
    clntsess = NULL;
    SSL_shutdown(clientssl);
    SSL_shutdown(serverssl);
    SSL_free(serverssl);
    SSL_free(clientssl);
    serverssl = clientssl = NULL;

    /* Create a session based on SHA384 */
    if (!TEST_true(SSL_CTX_set_cipher_list(cctx, "TLS13-AES-256-GCM-SHA384"))
            || !TEST_true(create_ssl_objects(sctx, cctx, &serverssl,
                                          &clientssl, NULL, NULL))
            || !TEST_true(create_ssl_connection(serverssl, clientssl,
                                                SSL_ERROR_NONE)))
        goto end;

    clntsess = SSL_get1_session(clientssl);
    SSL_shutdown(clientssl);
    SSL_shutdown(serverssl);
    SSL_free(serverssl);
    SSL_free(clientssl);
    serverssl = clientssl = NULL;

    if (!TEST_true(SSL_CTX_set_cipher_list(cctx,
                   "TLS13-AES-128-GCM-SHA256:TLS13-AES-256-GCM-SHA384"))
            || !TEST_true(SSL_CTX_set_cipher_list(sctx,
                                                  "TLS13-AES-256-GCM-SHA384"))
            || !TEST_true(create_ssl_objects(sctx, cctx, &serverssl, &clientssl,
                                             NULL, NULL))
            || !TEST_true(SSL_set_session(clientssl, clntsess))
               /*
                * We use SSL_ERROR_WANT_READ below so that we can pause the
                * connection after the initial ClientHello has been sent to
                * enable us to make some session changes.
                */
            || !TEST_false(create_ssl_connection(serverssl, clientssl,
                                                SSL_ERROR_WANT_READ)))
        goto end;

    /* Trick the client into thinking this session is for a different digest */
    clntsess->cipher = aes_128_gcm_sha256;
    clntsess->cipher_id = clntsess->cipher->id;

    /*
     * Continue the previously started connection. Server has selected a SHA-384
     * ciphersuite, but client thinks the session is for SHA-256, so it should
     * bail out.
     */
    if (!TEST_false(create_ssl_connection(serverssl, clientssl,
                                                SSL_ERROR_SSL))
            || !TEST_int_eq(ERR_GET_REASON(ERR_get_error()),
                            SSL_R_CIPHERSUITE_DIGEST_HAS_CHANGED))
        goto end;

    testresult = 1;

 end:
    SSL_SESSION_free(clntsess);
    SSL_free(serverssl);
    SSL_free(clientssl);
    SSL_CTX_free(sctx);
    SSL_CTX_free(cctx);

    return testresult;
}

#endif /* OPENSSL_NO_TLS1_3 */

static int clntaddoldcb = 0;
static int clntparseoldcb = 0;
static int srvaddoldcb = 0;
static int srvparseoldcb = 0;
static int clntaddnewcb = 0;
static int clntparsenewcb = 0;
static int srvaddnewcb = 0;
static int srvparsenewcb = 0;
static int snicb = 0;

#define TEST_EXT_TYPE1  0xff00

static int old_add_cb(SSL *s, unsigned int ext_type, const unsigned char **out,
                      size_t *outlen, int *al, void *add_arg)
{
    int *server = (int *)add_arg;
    unsigned char *data;

    if (SSL_is_server(s))
        srvaddoldcb++;
    else
        clntaddoldcb++;

    if (*server != SSL_is_server(s)
            || (data = OPENSSL_malloc(sizeof(*data))) == NULL)
        return -1;

    *data = 1;
    *out = data;
    *outlen = sizeof(char);
    return 1;
}

static void old_free_cb(SSL *s, unsigned int ext_type, const unsigned char *out,
                        void *add_arg)
{
    OPENSSL_free((unsigned char *)out);
}

static int old_parse_cb(SSL *s, unsigned int ext_type, const unsigned char *in,
                        size_t inlen, int *al, void *parse_arg)
{
    int *server = (int *)parse_arg;

    if (SSL_is_server(s))
        srvparseoldcb++;
    else
        clntparseoldcb++;

    if (*server != SSL_is_server(s)
            || inlen != sizeof(char)
            || *in != 1)
        return -1;

    return 1;
}

static int new_add_cb(SSL *s, unsigned int ext_type, unsigned int context,
                      const unsigned char **out, size_t *outlen, X509 *x,
                      size_t chainidx, int *al, void *add_arg)
{
    int *server = (int *)add_arg;
    unsigned char *data;

    if (SSL_is_server(s))
        srvaddnewcb++;
    else
        clntaddnewcb++;