1 files changed, 280 insertions, 0 deletions
diff --git a/test/sslcorrupttest.c b/test/sslcorrupttest.c
new file mode 100644
index 000000000000..deb2a2c31c4f
--- /dev/null
+++ b/test/sslcorrupttest.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <string.h>
+#include "helpers/ssltestlib.h"
+#include "testutil.h"
+
+static int docorrupt = 0;
+
+static void copy_flags(BIO *bio)
+{
+    int flags;
+    BIO *next = BIO_next(bio);
+
+    flags = BIO_test_flags(next, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
+    BIO_clear_flags(bio, BIO_FLAGS_SHOULD_RETRY | BIO_FLAGS_RWS);
+    BIO_set_flags(bio, flags);
+}
+
+static int tls_corrupt_read(BIO *bio, char *out, int outl)
+{
+    int ret;
+    BIO *next = BIO_next(bio);
+
+    ret = BIO_read(next, out, outl);
+    copy_flags(bio);
+
+    return ret;
+}
+
+static int tls_corrupt_write(BIO *bio, const char *in, int inl)
+{
+    int ret;
+    BIO *next = BIO_next(bio);
+    char *copy;
+
+    if (docorrupt) {
+        if (!TEST_ptr(copy = OPENSSL_memdup(in, inl)))
+            return 0;
+        /* corrupt last bit of application data */
+        copy[inl-1] ^= 1;
+        ret = BIO_write(next, copy, inl);
+        OPENSSL_free(copy);
+    } else {
+        ret = BIO_write(next, in, inl);
+    }
+    copy_flags(bio);
+
+    return ret;
+}
+
+static long tls_corrupt_ctrl(BIO *bio, int cmd, long num, void *ptr)
+{
+    long ret;
+    BIO *next = BIO_next(bio);
+
+    if (next == NULL)
+        return 0;
+
+    switch (cmd) {
+    case BIO_CTRL_DUP:
+        ret = 0L;
+        break;
+    default:
+        ret = BIO_ctrl(next, cmd, num, ptr);
+        break;
+    }
+    return ret;
+}
+
+static int tls_corrupt_gets(BIO *bio, char *buf, int size)
+{
+    /* We don't support this - not needed anyway */
+    return -1;
+}
+
+static int tls_corrupt_puts(BIO *bio, const char *str)
+{
+    /* We don't support this - not needed anyway */
+    return -1;
+}
+
+static int tls_corrupt_new(BIO *bio)
+{
+    BIO_set_init(bio, 1);
+
+    return 1;
+}
+
+static int tls_corrupt_free(BIO *bio)
+{
+    BIO_set_init(bio, 0);
+
+    return 1;
+}
+
+#define BIO_TYPE_CUSTOM_FILTER  (0x80 | BIO_TYPE_FILTER)
+
+static BIO_METHOD *method_tls_corrupt = NULL;
+
+/* Note: Not thread safe! */
+static const BIO_METHOD *bio_f_tls_corrupt_filter(void)
+{
+    if (method_tls_corrupt == NULL) {
+        method_tls_corrupt = BIO_meth_new(BIO_TYPE_CUSTOM_FILTER,
+                                          "TLS corrupt filter");
+        if (   method_tls_corrupt == NULL
+            || !BIO_meth_set_write(method_tls_corrupt, tls_corrupt_write)
+            || !BIO_meth_set_read(method_tls_corrupt, tls_corrupt_read)
+            || !BIO_meth_set_puts(method_tls_corrupt, tls_corrupt_puts)
+            || !BIO_meth_set_gets(method_tls_corrupt, tls_corrupt_gets)
+            || !BIO_meth_set_ctrl(method_tls_corrupt, tls_corrupt_ctrl)
+            || !BIO_meth_set_create(method_tls_corrupt, tls_corrupt_new)
+            || !BIO_meth_set_destroy(method_tls_corrupt, tls_corrupt_free))
+            return NULL;
+    }
+    return method_tls_corrupt;
+}
+
+static void bio_f_tls_corrupt_filter_free(void)
+{
+    BIO_meth_free(method_tls_corrupt);
+}
+
+/*
+ * The test is supposed to be executed with RSA key, customarily
+ * with apps/server.pem used even in other tests. For this reason
+ * |cipher_list| is initialized with RSA ciphers' names. This
+ * naturally means that if test is to be re-purposed for other
+ * type of key, then NID_auth_* filter below would need adjustment.
+ */
+static const char **cipher_list = NULL;
+
+static int setup_cipher_list(void)
+{
+    SSL_CTX *ctx = NULL;
+    SSL *ssl = NULL;
+    STACK_OF(SSL_CIPHER) *sk_ciphers = NULL;
+    int i, j, numciphers = 0;
+
+    if (!TEST_ptr(ctx = SSL_CTX_new(TLS_server_method()))
+            || !TEST_ptr(ssl = SSL_new(ctx))
+            || !TEST_ptr(sk_ciphers = SSL_get1_supported_ciphers(ssl)))
+        goto err;
+
+    /*
+     * The |cipher_list| will be filled only with names of RSA ciphers,
+     * so that some of the allocated space will be wasted, but the loss
+     * is deemed acceptable...
+     */
+    cipher_list = OPENSSL_malloc(sk_SSL_CIPHER_num(sk_ciphers) *
+                                 sizeof(cipher_list[0]));
+    if (!TEST_ptr(cipher_list))
+        goto err;
+
+    for (j = 0, i = 0; i < sk_SSL_CIPHER_num(sk_ciphers); i++) {
+        const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(sk_ciphers, i);
+
+        if (SSL_CIPHER_get_auth_nid(cipher) == NID_auth_rsa)
+            cipher_list[j++] = SSL_CIPHER_get_name(cipher);
+    }
+    if (TEST_int_ne(j, 0))
+        numciphers = j;
+
+err:
+    sk_SSL_CIPHER_free(sk_ciphers);
+    SSL_free(ssl);
+    SSL_CTX_free(ctx);
+
+    return numciphers;
+}
+
+static char *cert = NULL;
+static char *privkey = NULL;
+
+static int test_ssl_corrupt(int testidx)
+{
+    static unsigned char junk[16000] = { 0 };
+    SSL_CTX *sctx = NULL, *cctx = NULL;
+    SSL *server = NULL, *client = NULL;
+    BIO *c_to_s_fbio;
+    int testresult = 0;
+    STACK_OF(SSL_CIPHER) *ciphers;
+    const SSL_CIPHER *currcipher;
+    int err;
+
+    docorrupt = 0;
+
+    TEST_info("Starting #%d, %s", testidx, cipher_list[testidx]);
+
+    if (!TEST_true(create_ssl_ctx_pair(NULL, TLS_server_method(),
+                                       TLS_client_method(),
+                                       TLS1_VERSION, 0,
+                                       &sctx, &cctx, cert, privkey)))
+        return 0;
+
+    if (!TEST_true(SSL_CTX_set_dh_auto(sctx, 1))
+            || !TEST_true(SSL_CTX_set_cipher_list(cctx, cipher_list[testidx]))
+            || !TEST_true(SSL_CTX_set_ciphersuites(cctx, ""))
+            || !TEST_ptr(ciphers = SSL_CTX_get_ciphers(cctx))
+            || !TEST_int_eq(sk_SSL_CIPHER_num(ciphers), 1)
+            || !TEST_ptr(currcipher = sk_SSL_CIPHER_value(ciphers, 0)))
+        goto end;
+
+    /*
+     * No ciphers we are using are TLSv1.3 compatible so we should not attempt
+     * to negotiate TLSv1.3
+     */
+    if (!TEST_true(SSL_CTX_set_max_proto_version(cctx, TLS1_2_VERSION)))
+        goto end;
+
+    if (!TEST_ptr(c_to_s_fbio = BIO_new(bio_f_tls_corrupt_filter())))
+        goto end;
+
+    /* BIO is freed by create_ssl_connection on error */
+    if (!TEST_true(create_ssl_objects(sctx, cctx, &server, &client, NULL,
+                                      c_to_s_fbio)))
+        goto end;
+
+    if (!TEST_true(create_ssl_connection(server, client, SSL_ERROR_NONE)))
+        goto end;
+
+    docorrupt = 1;
+
+    if (!TEST_int_ge(SSL_write(client, junk, sizeof(junk)), 0))
+        goto end;
+
+    if (!TEST_int_lt(SSL_read(server, junk, sizeof(junk)), 0))
+        goto end;
+
+    do {
+        err = ERR_get_error();
+
+        if (err == 0) {
+            TEST_error("Decryption failed or bad record MAC not seen");
+            goto end;
+        }
+    } while (ERR_GET_REASON(err) != SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
+
+    testresult = 1;
+ end:
+    SSL_free(server);
+    SSL_free(client);
+    SSL_CTX_free(sctx);
+    SSL_CTX_free(cctx);
+    return testresult;
+}
+
+OPT_TEST_DECLARE_USAGE("certfile privkeyfile\n")
+
+int setup_tests(void)
+{
+    int n;
+
+    if (!test_skip_common_options()) {
+        TEST_error("Error parsing test options\n");
+        return 0;
+    }
+
+    if (!TEST_ptr(cert = test_get_argument(0))
+            || !TEST_ptr(privkey = test_get_argument(1)))
+        return 0;
+
+    n = setup_cipher_list();
+    if (n > 0)
+        ADD_ALL_TESTS(test_ssl_corrupt, n);
+    return 1;
+}
+
+void cleanup_tests(void)
+{
+    bio_f_tls_corrupt_filter_free();
+    OPENSSL_free(cipher_list);
+}