--- /dev/null
+/*
+ * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL licenses, (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * https://www.openssl.org/source/license.html
+ * or in the file LICENSE in the source distribution.
+ */
+
+#include <string.h>
+#include <openssl/ssl.h>
+#include <openssl/bio.h>
+#include <openssl/err.h>
+
+#include "../ssl/packet_locl.h"
+
+#include "ssltestlib.h"
+
+/* Should we fragment records or not? 0 = no, !0 = yes*/
+static int fragment = 0;
+
+static int async_new(BIO *bi);
+static int async_free(BIO *a);
+static int async_read(BIO *b, char *out, int outl);
+static int async_write(BIO *b, const char *in, int inl);
+static long async_ctrl(BIO *b, int cmd, long num, void *ptr);
+static int async_gets(BIO *bp, char *buf, int size);
+static int async_puts(BIO *bp, const char *str);
+
+/* Choose a sufficiently large type likely to be unused for this custom BIO */
+# define BIO_TYPE_ASYNC_FILTER (0x80 | BIO_TYPE_FILTER)
+
+static BIO_METHOD *methods_async = NULL;
+
+struct async_ctrs {
+ unsigned int rctr;
+ unsigned int wctr;
+};
+
+static const BIO_METHOD *bio_f_async_filter()
+{
+ if (methods_async == NULL) {
+ methods_async = BIO_meth_new(BIO_TYPE_ASYNC_FILTER, "Async filter");
+ if ( methods_async == NULL
+ || !BIO_meth_set_write(methods_async, async_write)
+ || !BIO_meth_set_read(methods_async, async_read)
+ || !BIO_meth_set_puts(methods_async, async_puts)
+ || !BIO_meth_set_gets(methods_async, async_gets)
+ || !BIO_meth_set_ctrl(methods_async, async_ctrl)
+ || !BIO_meth_set_create(methods_async, async_new)
+ || !BIO_meth_set_destroy(methods_async, async_free))
+ return NULL;
+ }
+ return methods_async;
+}
+
+static int async_new(BIO *bio)
+{
+ struct async_ctrs *ctrs;
+
+ ctrs = OPENSSL_zalloc(sizeof(struct async_ctrs));
+ if (ctrs == NULL)
+ return 0;
+
+ BIO_set_data(bio, ctrs);
+ BIO_set_init(bio, 1);
+ return 1;
+}
+
+static int async_free(BIO *bio)
+{
+ struct async_ctrs *ctrs;
+
+ if (bio == NULL)
+ return 0;
+ ctrs = BIO_get_data(bio);
+ OPENSSL_free(ctrs);
+ BIO_set_data(bio, NULL);
+ BIO_set_init(bio, 0);
+
+ return 1;
+}
+
+static int async_read(BIO *bio, char *out, int outl)
+{
+ struct async_ctrs *ctrs;
+ int ret = 0;
+ BIO *next = BIO_next(bio);
+
+ if (outl <= 0)
+ return 0;
+ if (next == NULL)
+ return 0;
+
+ ctrs = BIO_get_data(bio);
+
+ BIO_clear_retry_flags(bio);
+
+ if (ctrs->rctr > 0) {
+ ret = BIO_read(next, out, 1);
+ if (ret <= 0 && BIO_should_read(next))
+ BIO_set_retry_read(bio);
+ ctrs->rctr = 0;
+ } else {
+ ctrs->rctr++;
+ BIO_set_retry_read(bio);
+ }
+
+ return ret;
+}
+
+#define MIN_RECORD_LEN 6
+
+#define CONTENTTYPEPOS 0
+#define VERSIONHIPOS 1
+#define VERSIONLOPOS 2
+#define DATAPOS 5
+
+static int async_write(BIO *bio, const char *in, int inl)
+{
+ struct async_ctrs *ctrs;
+ int ret = 0;
+ size_t written = 0;
+ BIO *next = BIO_next(bio);
+
+ if (inl <= 0)
+ return 0;
+ if (next == NULL)
+ return 0;
+
+ ctrs = BIO_get_data(bio);
+
+ BIO_clear_retry_flags(bio);
+
+ if (ctrs->wctr > 0) {
+ ctrs->wctr = 0;
+ if (fragment) {
+ PACKET pkt;
+
+ if (!PACKET_buf_init(&pkt, (const unsigned char *)in, inl))
+ abort();
+
+ while (PACKET_remaining(&pkt) > 0) {
+ PACKET payload;
+ unsigned int contenttype, versionhi, versionlo, data;
+
+ if ( !PACKET_get_1(&pkt, &contenttype)
+ || !PACKET_get_1(&pkt, &versionhi)
+ || !PACKET_get_1(&pkt, &versionlo)
+ || !PACKET_get_length_prefixed_2(&pkt, &payload))
+ abort();
+
+ /* Pretend we wrote out the record header */
+ written += SSL3_RT_HEADER_LENGTH;
+
+ while (PACKET_get_1(&payload, &data)) {
+ /* Create a new one byte long record for each byte in the
+ * record in the input buffer
+ */
+ char smallrec[MIN_RECORD_LEN] = {
+ 0, /* Content type */
+ 0, /* Version hi */
+ 0, /* Version lo */
+ 0, /* Length hi */
+ 1, /* Length lo */
+ 0 /* Data */
+ };
+
+ smallrec[CONTENTTYPEPOS] = contenttype;
+ smallrec[VERSIONHIPOS] = versionhi;
+ smallrec[VERSIONLOPOS] = versionlo;
+ smallrec[DATAPOS] = data;
+ ret = BIO_write(next, smallrec, MIN_RECORD_LEN);
+ if (ret <= 0)
+ abort();
+ written++;
+ }
+ /*
+ * We can't fragment anything after the CCS, otherwise we
+ * get a bad record MAC
+ */
+ if (contenttype == SSL3_RT_CHANGE_CIPHER_SPEC) {
+ fragment = 0;
+ break;
+ }
+ }
+ }
+ /* Write any data we have left after fragmenting */
+ ret = 0;
+ if ((int)written < inl) {
+ ret = BIO_write(next, in + written , inl - written);
+ }
+
+ if (ret <= 0 && BIO_should_write(next))
+ BIO_set_retry_write(bio);
+ else
+ ret += written;
+ } else {
+ ctrs->wctr++;
+ BIO_set_retry_write(bio);
+ }
+
+ return ret;
+}
+
+static long async_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 async_gets(BIO *bio, char *buf, int size)
+{
+ /* We don't support this - not needed anyway */
+ return -1;
+}
+
+static int async_puts(BIO *bio, const char *str)
+{
+ return async_write(bio, str, strlen(str));
+}
+
+#define MAX_ATTEMPTS 100
+
+int main(int argc, char *argv[])
+{
+ SSL_CTX *serverctx = NULL, *clientctx = NULL;
+ SSL *serverssl = NULL, *clientssl = NULL;
+ BIO *s_to_c_fbio = NULL, *c_to_s_fbio = NULL;
+ int test, err = 1, ret;
+ size_t i, j;
+ const char testdata[] = "Test data";
+ char buf[sizeof(testdata)];
+
+ CRYPTO_set_mem_debug(1);
+ CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
+
+ if (argc != 3) {
+ printf("Invalid argument count\n");
+ goto end;
+ }
+
+ if (!create_ssl_ctx_pair(TLS_server_method(), TLS_client_method(),
+ &serverctx, &clientctx, argv[1], argv[2])) {
+ printf("Failed to create SSL_CTX pair\n");
+ goto end;
+ }
+
+ /*
+ * We do 2 test runs. The first time around we just do a normal handshake
+ * with lots of async io going on. The second time around we also break up
+ * all records so that the content is only one byte length (up until the
+ * CCS)
+ */
+ for (test = 1; test < 3; test++) {
+ if (test == 2)
+ fragment = 1;
+
+
+ s_to_c_fbio = BIO_new(bio_f_async_filter());
+ c_to_s_fbio = BIO_new(bio_f_async_filter());
+ if (s_to_c_fbio == NULL || c_to_s_fbio == NULL) {
+ printf("Failed to create filter BIOs\n");
+ BIO_free(s_to_c_fbio);
+ BIO_free(c_to_s_fbio);
+ goto end;
+ }
+
+ /* BIOs get freed on error */
+ if (!create_ssl_objects(serverctx, clientctx, &serverssl, &clientssl,
+ s_to_c_fbio, c_to_s_fbio)) {
+ printf("Test %d failed: Create SSL objects failed\n", test);
+ goto end;
+ }
+
+ if (!create_ssl_connection(serverssl, clientssl)) {
+ printf("Test %d failed: Create SSL connection failed\n", test);
+ goto end;
+ }
+
+ /*
+ * Send and receive some test data. Do the whole thing twice to ensure
+ * we hit at least one async event in both reading and writing
+ */
+ for (j = 0; j < 2; j++) {
+ /*
+ * Write some test data. It should never take more than 2 attempts
+ * (the first one might be a retryable fail). A zero return from
+ * SSL_write() is a non-retryable failure, so fail immediately if
+ * we get that.
+ */
+ for (ret = -1, i = 0; ret < 0 && i < 2 * sizeof(testdata); i++)
+ ret = SSL_write(clientssl, testdata, sizeof(testdata));
+ if (ret <= 0) {
+ printf("Test %d failed: Failed to write app data\n", test);
+ goto end;
+ }
+ /*
+ * Now read the test data. It may take more attemps here because
+ * it could fail once for each byte read, including all overhead
+ * bytes from the record header/padding etc. Fail immediately if we
+ * get a zero return from SSL_read().
+ */
+ for (ret = -1, i = 0; ret < 0 && i < MAX_ATTEMPTS; i++)
+ ret = SSL_read(serverssl, buf, sizeof(buf));
+ if (ret <= 0) {
+ printf("Test %d failed: Failed to read app data\n", test);
+ goto end;
+ }
+ if (ret != sizeof(testdata)
+ || memcmp(buf, testdata, sizeof(testdata)) != 0) {
+ printf("Test %d failed: Unexpected app data received\n", test);
+ goto end;
+ }
+ }
+
+ /* Also frees the BIOs */
+ SSL_free(clientssl);
+ SSL_free(serverssl);
+ clientssl = serverssl = NULL;
+ }
+
+ printf("Test success\n");
+
+ err = 0;
+ end:
+ if (err)
+ ERR_print_errors_fp(stderr);
+
+ SSL_free(clientssl);
+ SSL_free(serverssl);
+ SSL_CTX_free(clientctx);
+ SSL_CTX_free(serverctx);
+
+# ifndef OPENSSL_NO_CRYPTO_MDEBUG
+ CRYPTO_mem_leaks_fp(stderr);
+# endif
+
+ return err;
+}
projects / cassiopeia.git / blobdiff