381 lines
10 KiB
C
381 lines
10 KiB
C
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/*
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* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL licenses, (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* https://www.openssl.org/source/license.html
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* or in the file LICENSE in the source distribution.
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*/
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#include <string.h>
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#include <openssl/ssl.h>
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include "../ssl/packet_locl.h"
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/* Should we fragment records or not? 0 = no, !0 = yes*/
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static int fragment = 0;
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static int async_new(BIO *bi);
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static int async_free(BIO *a);
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static int async_read(BIO *b, char *out, int outl);
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static int async_write(BIO *b, const char *in, int inl);
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static long async_ctrl(BIO *b, int cmd, long num, void *ptr);
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static int async_gets(BIO *bp, char *buf, int size);
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static int async_puts(BIO *bp, const char *str);
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/* Choose a sufficiently large type likely to be unused for this custom BIO */
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# define BIO_TYPE_ASYNC_FILTER (0x80 | BIO_TYPE_FILTER)
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static BIO_METHOD *methods_async = NULL;
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struct async_ctrs {
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unsigned int rctr;
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unsigned int wctr;
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};
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static const BIO_METHOD *bio_f_async_filter()
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{
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if (methods_async == NULL) {
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methods_async = BIO_meth_new(BIO_TYPE_ASYNC_FILTER, "Async filter");
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if ( methods_async == NULL
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|| !BIO_meth_set_write(methods_async, async_write)
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|| !BIO_meth_set_read(methods_async, async_read)
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|| !BIO_meth_set_puts(methods_async, async_puts)
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|| !BIO_meth_set_gets(methods_async, async_gets)
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|| !BIO_meth_set_ctrl(methods_async, async_ctrl)
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|| !BIO_meth_set_create(methods_async, async_new)
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|| !BIO_meth_set_destroy(methods_async, async_free))
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return NULL;
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}
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return methods_async;
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}
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static int async_new(BIO *bio)
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{
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struct async_ctrs *ctrs;
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ctrs = OPENSSL_zalloc(sizeof(struct async_ctrs));
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if (ctrs == NULL)
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return 0;
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BIO_set_data(bio, ctrs);
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BIO_set_init(bio, 1);
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return 1;
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}
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static int async_free(BIO *bio)
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{
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struct async_ctrs *ctrs;
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if (bio == NULL)
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return 0;
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ctrs = BIO_get_data(bio);
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OPENSSL_free(ctrs);
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BIO_set_data(bio, NULL);
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BIO_set_init(bio, 0);
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return 1;
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}
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static int async_read(BIO *bio, char *out, int outl)
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{
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struct async_ctrs *ctrs;
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int ret = 0;
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BIO *next = BIO_next(bio);
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if (outl <= 0)
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return 0;
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if (next == NULL)
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return 0;
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ctrs = BIO_get_data(bio);
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BIO_clear_retry_flags(bio);
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if (ctrs->rctr > 0) {
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ret = BIO_read(next, out, 1);
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if (ret <= 0 && BIO_should_read(next))
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BIO_set_retry_read(bio);
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ctrs->rctr = 0;
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} else {
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ctrs->rctr++;
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BIO_set_retry_read(bio);
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}
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return ret;
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}
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#define MIN_RECORD_LEN 6
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#define CONTENTTYPEPOS 0
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#define VERSIONHIPOS 1
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#define VERSIONLOPOS 2
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#define DATAPOS 5
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static int async_write(BIO *bio, const char *in, int inl)
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{
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struct async_ctrs *ctrs;
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int ret = 0;
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size_t written = 0;
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BIO *next = BIO_next(bio);
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if (inl <= 0)
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return 0;
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if (next == NULL)
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return 0;
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ctrs = BIO_get_data(bio);
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BIO_clear_retry_flags(bio);
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if (ctrs->wctr > 0) {
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ctrs->wctr = 0;
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if (fragment) {
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PACKET pkt;
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if (!PACKET_buf_init(&pkt, (const unsigned char *)in, inl))
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abort();
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while (PACKET_remaining(&pkt) > 0) {
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PACKET payload;
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unsigned int contenttype, versionhi, versionlo, data;
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if ( !PACKET_get_1(&pkt, &contenttype)
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|| !PACKET_get_1(&pkt, &versionhi)
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|| !PACKET_get_1(&pkt, &versionlo)
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|| !PACKET_get_length_prefixed_2(&pkt, &payload))
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abort();
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/* Pretend we wrote out the record header */
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written += SSL3_RT_HEADER_LENGTH;
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while (PACKET_get_1(&payload, &data)) {
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/* Create a new one byte long record for each byte in the
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* record in the input buffer
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*/
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char smallrec[MIN_RECORD_LEN] = {
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0, /* Content type */
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0, /* Version hi */
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0, /* Version lo */
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0, /* Length hi */
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1, /* Length lo */
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0 /* Data */
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};
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smallrec[CONTENTTYPEPOS] = contenttype;
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smallrec[VERSIONHIPOS] = versionhi;
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smallrec[VERSIONLOPOS] = versionlo;
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smallrec[DATAPOS] = data;
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ret = BIO_write(next, smallrec, MIN_RECORD_LEN);
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if (ret <= 0)
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abort();
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written++;
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}
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/*
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* We can't fragment anything after the CCS, otherwise we
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* get a bad record MAC
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*/
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if (contenttype == SSL3_RT_CHANGE_CIPHER_SPEC) {
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fragment = 0;
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break;
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}
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}
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}
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/* Write any data we have left after fragmenting */
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ret = 0;
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if ((int)written < inl) {
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ret = BIO_write(next, in + written , inl - written);
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}
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if (ret <= 0 && BIO_should_write(next))
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BIO_set_retry_write(bio);
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else
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ret += written;
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} else {
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ctrs->wctr++;
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BIO_set_retry_write(bio);
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}
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return ret;
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}
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static long async_ctrl(BIO *bio, int cmd, long num, void *ptr)
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{
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long ret;
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BIO *next = BIO_next(bio);
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if (next == NULL)
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return 0;
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switch (cmd) {
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case BIO_CTRL_DUP:
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ret = 0L;
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break;
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default:
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ret = BIO_ctrl(next, cmd, num, ptr);
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break;
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}
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return ret;
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}
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static int async_gets(BIO *bio, char *buf, int size)
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{
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/* We don't support this - not needed anyway */
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return -1;
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}
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static int async_puts(BIO *bio, const char *str)
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{
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return async_write(bio, str, strlen(str));
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}
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#define MAXLOOPS 100000
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int main(int argc, char *argv[])
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{
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SSL_CTX *serverctx = NULL, *clientctx = NULL;
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SSL *serverssl = NULL, *clientssl = NULL;
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BIO *s_to_c_bio = NULL, *c_to_s_bio = NULL;
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BIO *s_to_c_fbio = NULL, *c_to_s_fbio = NULL;
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int retc = -1, rets = -1, err, abortctr;
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int test;
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CRYPTO_set_mem_debug(1);
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CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
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if (argc != 3) {
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printf("Invalid argument count\n");
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goto end;
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}
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serverctx = SSL_CTX_new(TLS_server_method());
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clientctx = SSL_CTX_new(TLS_client_method());
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if (serverctx == NULL || clientctx == NULL) {
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printf("Failed to create SSL_CTX\n");
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goto end;
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}
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if (SSL_CTX_use_certificate_file(serverctx, argv[1],
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SSL_FILETYPE_PEM) <= 0) {
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printf("Failed to load server certificate\n");
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goto end;
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}
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if (SSL_CTX_use_PrivateKey_file(serverctx, argv[2],
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SSL_FILETYPE_PEM) <= 0) {
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printf("Failed to load server private key\n");
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}
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if (SSL_CTX_check_private_key(serverctx) <= 0) {
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printf("Failed to check private key\n");
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goto end;
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}
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/*
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* We do 2 test runs. The first time around we just do a normal handshake
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* with lots of async io going on. The second time around we also break up
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* all records so that the content is only one byte length (up until the
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* CCS)
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*/
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for (test = 1; test < 3; test++) {
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abortctr = 0;
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retc = rets = -1;
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if (test == 2)
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fragment = 1;
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serverssl = SSL_new(serverctx);
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clientssl = SSL_new(clientctx);
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if (serverssl == NULL || clientssl == NULL) {
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printf("Failed to create SSL object\n");
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goto end;
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}
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s_to_c_bio = BIO_new(BIO_s_mem());
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c_to_s_bio = BIO_new(BIO_s_mem());
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if (s_to_c_bio == NULL || c_to_s_bio == NULL) {
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printf("Failed to create mem BIOs\n");
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goto end;
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}
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s_to_c_fbio = BIO_new(bio_f_async_filter());
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c_to_s_fbio = BIO_new(bio_f_async_filter());
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if (s_to_c_fbio == NULL || c_to_s_fbio == NULL) {
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printf("Failed to create filter BIOs\n");
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goto end;
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}
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s_to_c_bio = BIO_push(s_to_c_fbio, s_to_c_bio);
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c_to_s_bio = BIO_push(c_to_s_fbio, c_to_s_bio);
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if (s_to_c_bio == NULL || c_to_s_bio == NULL) {
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printf("Failed to create chained BIOs\n");
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goto end;
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}
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/* Set Non-blocking IO behaviour */
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BIO_set_mem_eof_return(s_to_c_bio, -1);
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BIO_set_mem_eof_return(c_to_s_bio, -1);
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/* Up ref these as we are passing them to two SSL objects */
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BIO_up_ref(s_to_c_bio);
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BIO_up_ref(c_to_s_bio);
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SSL_set_bio(serverssl, c_to_s_bio, s_to_c_bio);
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SSL_set_bio(clientssl, s_to_c_bio, c_to_s_bio);
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do {
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err = SSL_ERROR_WANT_WRITE;
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while (retc <= 0 && err == SSL_ERROR_WANT_WRITE) {
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retc = SSL_connect(clientssl);
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if (retc <= 0)
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err = SSL_get_error(clientssl, retc);
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}
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if (retc <= 0 && err != SSL_ERROR_WANT_READ) {
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printf("Test %d failed: SSL_connect() failed %d, %d\n",
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test, retc, err);
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goto end;
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}
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err = SSL_ERROR_WANT_WRITE;
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while (rets <= 0 && err == SSL_ERROR_WANT_WRITE) {
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rets = SSL_accept(serverssl);
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if (rets <= 0)
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err = SSL_get_error(serverssl, rets);
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}
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if (rets <= 0 && err != SSL_ERROR_WANT_READ) {
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printf("Test %d failed: SSL_accept() failed %d, %d\n",
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test, retc, err);
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goto end;
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}
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if (++abortctr == MAXLOOPS) {
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printf("Test %d failed: No progress made\n", test);
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goto end;
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}
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} while (retc <=0 || rets <= 0);
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/* Also frees the BIOs */
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SSL_free(clientssl);
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SSL_free(serverssl);
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clientssl = serverssl = NULL;
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}
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printf("Test success\n");
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end:
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if (retc <= 0 || rets <= 0)
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ERR_print_errors_fp(stderr);
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SSL_free(clientssl);
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SSL_free(serverssl);
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SSL_CTX_free(clientctx);
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SSL_CTX_free(serverctx);
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# ifndef OPENSSL_NO_CRYPTO_MDEBUG
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CRYPTO_mem_leaks_fp(stderr);
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# endif
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return (retc > 0 && rets > 0) ? 0 : 1;
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}
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