/* * Copyright 2016-2018 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 #include #include #include #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 = -1; 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 = -1; 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(), TLS1_VERSION, TLS_MAX_VERSION, &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++) { int len; /* * Write some test data. It should never take more than 2 attempts * (the first one might be a retryable fail). */ for (ret = -1, i = 0, len = 0; len != sizeof(testdata) && i < 2; i++) { ret = SSL_write(clientssl, testdata + len, sizeof(testdata) - len); if (ret > 0) { len += ret; } else { int ssl_error = SSL_get_error(clientssl, ret); if (ssl_error == SSL_ERROR_SYSCALL || ssl_error == SSL_ERROR_SSL) { printf("Test %d failed: Failed to write app data\n", test); err = -1; goto end; } } } if (len != sizeof(testdata)) { err = -1; printf("Test %d failed: Failed to write all app data\n", test); goto end; } /* * Now read the test data. It may take more attempts here because * it could fail once for each byte read, including all overhead * bytes from the record header/padding etc. */ for (ret = -1, i = 0, len = 0; len != sizeof(testdata) && i < MAX_ATTEMPTS; i++) { ret = SSL_read(serverssl, buf + len, sizeof(buf) - len); if (ret > 0) { len += ret; } else { int ssl_error = SSL_get_error(serverssl, ret); if (ssl_error == SSL_ERROR_SYSCALL || ssl_error == SSL_ERROR_SSL) { printf("Test %d failed: Failed to read app data\n", test); err = -1; goto end; } } } if (len != sizeof(testdata) || memcmp(buf, testdata, sizeof(testdata)) != 0) { err = -1; 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; }