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wolfssl/tests/utils.c

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/* utils.c
*
* Copyright (C) 2006-2025 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
#include <tests/unit.h>
#include <tests/utils.h>
#ifdef HAVE_MANUAL_MEMIO_TESTS_DEPENDENCIES
/* This set of memio functions allows for more fine tuned control of the TLS
* connection operations. For new tests, try to use ssl_memio first. */
/* To dump the memory in gdb use
* dump memory client.bin test_ctx.c_buff test_ctx.c_buff+test_ctx.c_len
* dump memory server.bin test_ctx.s_buff test_ctx.s_buff+test_ctx.s_len
* This can be imported into Wireshark by transforming the file with
* od -Ax -tx1 -v client.bin > client.bin.hex
* od -Ax -tx1 -v server.bin > server.bin.hex
* And then loading test_output.dump.hex into Wireshark using the
* "Import from Hex Dump..." option ion and selecting the TCP
* encapsulation option.
*/
int test_memio_write_cb(WOLFSSL *ssl, char *data, int sz, void *ctx)
{
struct test_memio_ctx *test_ctx;
byte *buf;
int *len;
int *msg_sizes;
int *msg_count;
test_ctx = (struct test_memio_ctx*)ctx;
if (wolfSSL_GetSide(ssl) == WOLFSSL_SERVER_END) {
buf = test_ctx->c_buff;
len = &test_ctx->c_len;
msg_sizes = test_ctx->c_msg_sizes;
msg_count = &test_ctx->c_msg_count;
}
else {
buf = test_ctx->s_buff;
len = &test_ctx->s_len;
msg_sizes = test_ctx->s_msg_sizes;
msg_count = &test_ctx->s_msg_count;
}
if ((unsigned)(*len + sz) > TEST_MEMIO_BUF_SZ)
return WOLFSSL_CBIO_ERR_WANT_WRITE;
if (*msg_count >= TEST_MEMIO_MAX_MSGS)
return WOLFSSL_CBIO_ERR_WANT_WRITE;
#ifdef WOLFSSL_DUMP_MEMIO_STREAM
{
char dump_file_name[64];
WOLFSSL_BIO *dump_file;
sprintf(dump_file_name, "%s/%s.dump", tmpDirName, currentTestName);
dump_file = wolfSSL_BIO_new_file(dump_file_name, "a");
if (dump_file != NULL) {
(void)wolfSSL_BIO_write(dump_file, data, sz);
wolfSSL_BIO_free(dump_file);
}
}
#endif
XMEMCPY(buf + *len, data, (size_t)sz);
msg_sizes[*msg_count] = sz;
(*msg_count)++;
*len += sz;
return sz;
}
int test_memio_read_cb(WOLFSSL *ssl, char *data, int sz, void *ctx)
{
struct test_memio_ctx *test_ctx;
int read_sz;
byte *buf;
int *len;
int *msg_sizes;
int *msg_count;
int *msg_pos;
int is_dtls;
test_ctx = (struct test_memio_ctx*)ctx;
is_dtls = wolfSSL_dtls(ssl);
if (wolfSSL_GetSide(ssl) == WOLFSSL_SERVER_END) {
buf = test_ctx->s_buff;
len = &test_ctx->s_len;
msg_sizes = test_ctx->s_msg_sizes;
msg_count = &test_ctx->s_msg_count;
msg_pos = &test_ctx->s_msg_pos;
}
else {
buf = test_ctx->c_buff;
len = &test_ctx->c_len;
msg_sizes = test_ctx->c_msg_sizes;
msg_count = &test_ctx->c_msg_count;
msg_pos = &test_ctx->c_msg_pos;
}
if (*len == 0 || *msg_pos >= *msg_count)
return WOLFSSL_CBIO_ERR_WANT_READ;
/* Calculate how much we can read from current message */
read_sz = msg_sizes[*msg_pos];
if (read_sz > sz)
read_sz = sz;
if (read_sz > *len) {
return WOLFSSL_CBIO_ERR_GENERAL;
}
/* Copy data from current message */
XMEMCPY(data, buf, (size_t)read_sz);
/* remove the read data from the buffer */
XMEMMOVE(buf, buf + read_sz, (size_t)(*len - read_sz));
*len -= read_sz;
msg_sizes[*msg_pos] -= read_sz;
/* if we are on dtls, discard the rest of the message */
if (is_dtls && msg_sizes[*msg_pos] > 0) {
XMEMMOVE(buf, buf + msg_sizes[*msg_pos], (size_t)(*len - msg_sizes[*msg_pos]));
*len -= msg_sizes[*msg_pos];
msg_sizes[*msg_pos] = 0;
}
/* If we've read the entire message */
if (msg_sizes[*msg_pos] == 0) {
/* Move to next message */
(*msg_pos)++;
if (*msg_pos >= *msg_count) {
*msg_pos = 0;
*msg_count = 0;
}
}
return read_sz;
}
int test_memio_do_handshake(WOLFSSL *ssl_c, WOLFSSL *ssl_s,
int max_rounds, int *rounds)
{
byte handshake_complete = 0, hs_c = 0, hs_s = 0;
int ret, err;
if (rounds != NULL)
*rounds = 0;
while (!handshake_complete && max_rounds > 0) {
if (!hs_c) {
wolfSSL_SetLoggingPrefix("client");
ret = wolfSSL_connect(ssl_c);
wolfSSL_SetLoggingPrefix(NULL);
if (ret == WOLFSSL_SUCCESS) {
hs_c = 1;
}
else {
err = wolfSSL_get_error(ssl_c, ret);
if (err != WOLFSSL_ERROR_WANT_READ &&
err != WOLFSSL_ERROR_WANT_WRITE)
return -1;
}
}
if (!hs_s) {
wolfSSL_SetLoggingPrefix("server");
ret = wolfSSL_accept(ssl_s);
wolfSSL_SetLoggingPrefix(NULL);
if (ret == WOLFSSL_SUCCESS) {
hs_s = 1;
}
else {
err = wolfSSL_get_error(ssl_s, ret);
if (err != WOLFSSL_ERROR_WANT_READ &&
err != WOLFSSL_ERROR_WANT_WRITE)
return -1;
}
}
handshake_complete = hs_c && hs_s;
max_rounds--;
if (rounds != NULL)
*rounds = *rounds + 1;
}
if (!handshake_complete)
return -1;
return 0;
}
int test_memio_setup_ex(struct test_memio_ctx *ctx,
WOLFSSL_CTX **ctx_c, WOLFSSL_CTX **ctx_s, WOLFSSL **ssl_c, WOLFSSL **ssl_s,
method_provider method_c, method_provider method_s,
byte *caCert, int caCertSz, byte *serverCert, int serverCertSz,
byte *serverKey, int serverKeySz)
{
int ret;
(void)caCert;
(void)caCertSz;
(void)serverCert;
(void)serverCertSz;
(void)serverKey;
(void)serverKeySz;
if (ctx_c != NULL && *ctx_c == NULL) {
*ctx_c = wolfSSL_CTX_new(method_c());
if (*ctx_c == NULL)
return -1;
#ifndef NO_CERTS
if (caCert == NULL) {
ret = wolfSSL_CTX_load_verify_locations(*ctx_c, caCertFile, 0);
}
else {
ret = wolfSSL_CTX_load_verify_buffer(*ctx_c, caCert, (long)caCertSz,
WOLFSSL_FILETYPE_ASN1);
}
if (ret != WOLFSSL_SUCCESS)
return -1;
#endif /* NO_CERTS */
wolfSSL_SetIORecv(*ctx_c, test_memio_read_cb);
wolfSSL_SetIOSend(*ctx_c, test_memio_write_cb);
if (ctx->c_ciphers != NULL) {
ret = wolfSSL_CTX_set_cipher_list(*ctx_c, ctx->c_ciphers);
if (ret != WOLFSSL_SUCCESS)
return -1;
}
}
if (ctx_s != NULL && *ctx_s == NULL) {
*ctx_s = wolfSSL_CTX_new(method_s());
if (*ctx_s == NULL)
return -1;
#ifndef NO_CERTS
if (serverKey == NULL) {
ret = wolfSSL_CTX_use_PrivateKey_file(*ctx_s, svrKeyFile,
WOLFSSL_FILETYPE_PEM);
}
else {
ret = wolfSSL_CTX_use_PrivateKey_buffer(*ctx_s, serverKey,
(long)serverKeySz, WOLFSSL_FILETYPE_ASN1);
}
if (ret != WOLFSSL_SUCCESS)
return- -1;
if (serverCert == NULL) {
ret = wolfSSL_CTX_use_certificate_file(*ctx_s, svrCertFile,
WOLFSSL_FILETYPE_PEM);
}
else {
ret = wolfSSL_CTX_use_certificate_chain_buffer_format(*ctx_s,
serverCert, (long)serverCertSz, WOLFSSL_FILETYPE_ASN1);
}
if (ret != WOLFSSL_SUCCESS)
return -1;
#endif /* NO_CERTS */
wolfSSL_SetIORecv(*ctx_s, test_memio_read_cb);
wolfSSL_SetIOSend(*ctx_s, test_memio_write_cb);
if (ctx->s_ciphers != NULL) {
ret = wolfSSL_CTX_set_cipher_list(*ctx_s, ctx->s_ciphers);
if (ret != WOLFSSL_SUCCESS)
return -1;
}
}
if (ctx_c != NULL && ssl_c != NULL) {
*ssl_c = wolfSSL_new(*ctx_c);
if (*ssl_c == NULL)
return -1;
wolfSSL_SetIOWriteCtx(*ssl_c, ctx);
wolfSSL_SetIOReadCtx(*ssl_c, ctx);
}
if (ctx_s != NULL && ssl_s != NULL) {
*ssl_s = wolfSSL_new(*ctx_s);
if (*ssl_s == NULL)
return -1;
wolfSSL_SetIOWriteCtx(*ssl_s, ctx);
wolfSSL_SetIOReadCtx(*ssl_s, ctx);
#if !defined(NO_DH)
SetDH(*ssl_s);
#endif
}
return 0;
}
void test_memio_clear_buffer(struct test_memio_ctx *ctx, int is_client)
{
if (is_client) {
ctx->c_len = 0;
ctx->c_msg_pos = 0;
ctx->c_msg_count = 0;
} else {
ctx->s_len = 0;
ctx->s_msg_pos = 0;
ctx->s_msg_count = 0;
}
}
int test_memio_inject_message(struct test_memio_ctx* ctx, int client,
const char* data, int sz)
{
int* len;
int* msg_count;
int* msg_sizes;
byte* buff;
if (client) {
buff = ctx->c_buff;
len = &ctx->c_len;
msg_count = &ctx->c_msg_count;
msg_sizes = ctx->c_msg_sizes;
}
else {
buff = ctx->s_buff;
len = &ctx->s_len;
msg_count = &ctx->s_msg_count;
msg_sizes = ctx->s_msg_sizes;
}
if (*len + sz > TEST_MEMIO_BUF_SZ) {
return -1;
}
if (*msg_count >= TEST_MEMIO_MAX_MSGS) {
return -1;
}
XMEMCPY(buff + *len, data, (size_t)sz);
msg_sizes[*msg_count] = sz;
(*msg_count)++;
*len += sz;
return 0;
}
int test_memio_drop_message(struct test_memio_ctx *ctx, int client, int msg_pos)
{
int *len;
int *msg_count;
int *msg_sizes;
int msg_off, msg_sz;
int i;
byte *buff;
if (client) {
buff = ctx->c_buff;
len = &ctx->c_len;
msg_count = &ctx->c_msg_count;
msg_sizes = ctx->c_msg_sizes;
} else {
buff = ctx->s_buff;
len = &ctx->s_len;
msg_count = &ctx->s_msg_count;
msg_sizes = ctx->s_msg_sizes;
}
if (*msg_count == 0) {
return -1;
}
msg_off = 0;
if (msg_pos >= *msg_count) {
return -1;
}
msg_sz = msg_sizes[msg_pos];
for (i = 0; i < msg_pos; i++) {
msg_off += msg_sizes[i];
}
XMEMMOVE(buff + msg_off, buff + msg_off + msg_sz, *len - msg_off - msg_sz);
for (i = msg_pos; i < *msg_count - 1; i++) {
msg_sizes[i] = msg_sizes[i + 1];
}
*len -= msg_sz;
(*msg_count)--;
return 0;
}
int test_memio_remove_from_buffer(struct test_memio_ctx* ctx, int client,
int off, int sz)
{
int* len;
int* msg_count;
int* msg_sizes;
int msg_off;
int i;
byte* buff;
if (client) {
buff = ctx->c_buff;
len = &ctx->c_len;
msg_count = &ctx->c_msg_count;
msg_sizes = ctx->c_msg_sizes;
}
else {
buff = ctx->s_buff;
len = &ctx->s_len;
msg_count = &ctx->s_msg_count;
msg_sizes = ctx->s_msg_sizes;
}
if (*len == 0) {
return -1;
}
if (off >= *len) {
return -1;
}
if (off + sz > *len) {
return -1;
}
/* find which message the offset is in */
msg_off = 0;
for (i = 0; i < *msg_count; i++) {
if (off >= msg_off && off < msg_off + msg_sizes[i]) {
break;
}
msg_off += msg_sizes[i];
}
/* don't support records that are split across messages */
if (off + sz > msg_off + msg_sizes[i]) {
return -1;
}
if (i == *msg_count) {
return -1;
}
if (sz == msg_sizes[i]) {
return test_memio_drop_message(ctx, client, i);
}
XMEMMOVE(buff + off, buff + off + sz, *len - off - sz);
msg_sizes[i] -= sz;
*len -= sz;
return 0;
}
int test_memio_modify_message_len(struct test_memio_ctx* ctx, int client,
int msg_pos, int new_len)
{
int* len;
int* msg_count;
int* msg_sizes;
int msg_off, msg_sz;
int i;
byte* buff;
if (client) {
buff = ctx->c_buff;
len = &ctx->c_len;
msg_count = &ctx->c_msg_count;
msg_sizes = ctx->c_msg_sizes;
}
else {
buff = ctx->s_buff;
len = &ctx->s_len;
msg_count = &ctx->s_msg_count;
msg_sizes = ctx->s_msg_sizes;
}
if (*msg_count == 0) {
return -1;
}
if (msg_pos >= *msg_count) {
return -1;
}
msg_off = 0;
for (i = 0; i < msg_pos; i++) {
msg_off += msg_sizes[i];
}
msg_sz = msg_sizes[msg_pos];
if (new_len > msg_sz) {
if (*len + (new_len - msg_sz) > TEST_MEMIO_BUF_SZ) {
return -1;
}
}
XMEMMOVE(buff + msg_off + new_len, buff + msg_off + msg_sz,
*len - msg_off - msg_sz);
msg_sizes[msg_pos] = new_len;
*len = *len - msg_sz + new_len;
return 0;
}
int test_memio_setup(struct test_memio_ctx *ctx,
WOLFSSL_CTX **ctx_c, WOLFSSL_CTX **ctx_s, WOLFSSL **ssl_c, WOLFSSL **ssl_s,
method_provider method_c, method_provider method_s)
{
return test_memio_setup_ex(ctx, ctx_c, ctx_s, ssl_c, ssl_s, method_c,
method_s, NULL, 0, NULL, 0, NULL, 0);
}
#endif /* HAVE_MANUAL_MEMIO_TESTS_DEPENDENCIES */
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