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vtls: initial implementation of rustls backend

Browse Source 
This adds a new TLS backend, rustls. It uses the C-to-rustls bindings
from https://github.com/abetterinternet/crustls.

Rustls is at https://github.com/ctz/rustls/.

There is still a fair bit to be done, like sending CloseNotify on
connection shutdown, respecting CAPATH, and properly indicating features
like "supports TLS 1.3 ciphersuites." But it works well enough to make
requests and receive responses.

Blog post for context:
https://www.abetterinternet.org/post/memory-safe-curl/

Closes #6350
This commit is contained in:
Jacob Hoffman-Andrews 2020-12-12 23:55:09 -08:00 committed by Daniel Stenberg
parent 3eebbfe8f3
commit 246399a874
No known key found for this signature in database
GPG Key ID: 5CC908FDB71E12C2
12 changed files with 639 additions and 8 deletions
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97
configure.ac
View File

@ -143,7 +143,7 @@ AC_SUBST(PKGADD_VENDOR)
dnl
dnl initialize all the info variables
curl_ssl_msg="no (--with-{ssl,gnutls,nss,mbedtls,wolfssl,schannel,secure-transport,mesalink,amissl,bearssl} )"
curl_ssl_msg="no (--with-{ssl,gnutls,nss,mbedtls,wolfssl,schannel,secure-transport,mesalink,amissl,bearssl,rustls} )"
curl_ssh_msg="no (--with-{libssh,libssh2})"
curl_zlib_msg="no (--with-zlib)"
curl_brotli_msg="no (--with-brotli)"
@ -2698,6 +2698,98 @@ if test -z "$ssl_backends" -o "x$OPT_BEARSSL" != xno; then
test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi
dnl ----------------------------------------------------
dnl check for rustls
dnl ----------------------------------------------------
OPT_RUSTLS=no
_cppflags=$CPPFLAGS
_ldflags=$LDFLAGS
AC_ARG_WITH(rustls,dnl
AC_HELP_STRING([--with-rustls=PATH],[where to look for rustls, PATH points to the installation root])
AC_HELP_STRING([--without-rustls], [disable rustls detection]),
OPT_RUSTLS=$withval)
if test -z "$ssl_backends" -o "x$OPT_RUSTLS" != xno; then
ssl_msg=
if test X"$OPT_RUSTLS" != Xno; then
if test "$OPT_RUSTLS" = "yes"; then
OPT_RUSTLS=""
fi
if test -z "$OPT_RUSTLS" ; then
dnl check for lib first without setting any new path
AC_CHECK_LIB(crustls, rustls_client_session_read,
dnl libcrustls found, set the variable
[
AC_DEFINE(USE_RUSTLS, 1, [if rustls is enabled])
AC_SUBST(USE_RUSTLS, [1])
RUSTLS_ENABLED=1
USE_RUSTLS="yes"
ssl_msg="rustls"
test rustls != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
], [], -lpthread -ldl)
fi
addld=""
addlib="-lpthread"
addcflags=""
bearssllib=""
if test "x$USE_RUSTLS" != "xyes"; then
dnl add the path and test again
addld=-L$OPT_RUSTLS/lib$libsuff
addcflags=-I$OPT_RUSTLS/include
rustlslib=$OPT_RUSTLS/lib$libsuff
LDFLAGS="$LDFLAGS $addld"
if test "$addcflags" != "-I/usr/include"; then
CPPFLAGS="$CPPFLAGS $addcflags"
fi
AC_CHECK_LIB(crustls, rustls_client_session_read,
[
AC_DEFINE(USE_RUSTLS, 1, [if rustls is enabled])
AC_SUBST(USE_RUSTLS, [1])
RUSTLS_ENABLED=1
USE_RUSTLS="yes"
ssl_msg="rustls"
test rustls != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
],
[
CPPFLAGS=$_cppflags
LDFLAGS=$_ldflags
], -lpthread -ldl)
fi
if test "x$USE_RUSTLS" = "xyes"; then
AC_MSG_NOTICE([detected rustls])
check_for_ca_bundle=1
LIBS="-lcrustls -lpthread -ldl $LIBS"
if test -n "$rustlslib"; then
dnl when shared libs were found in a path that the run-time
dnl linker doesn't search through, we need to add it to
dnl CURL_LIBRARY_PATH to prevent further configure tests to fail
dnl due to this
if test "x$cross_compiling" != "xyes"; then
CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$rustlslib"
export CURL_LIBRARY_PATH
AC_MSG_NOTICE([Added $rustlslib to CURL_LIBRARY_PATH])
fi
fi
fi
fi dnl rustls not disabled
test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi
dnl ----------------------------------------------------
dnl NSS. Only check if GnuTLS and OpenSSL are not enabled
dnl ----------------------------------------------------
@ -2828,7 +2920,8 @@ if test -z "$ssl_backends" -o "x$OPT_NSS" != xno; then
test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi
case "x$OPENSSL_ENABLED$GNUTLS_ENABLED$NSS_ENABLED$MBEDTLS_ENABLED$WOLFSSL_ENABLED$SCHANNEL_ENABLED$SECURETRANSPORT_ENABLED$MESALINK_ENABLED$BEARSSL_ENABLED$AMISSL_ENABLED" in
case "x$OPENSSL_ENABLED$GNUTLS_ENABLED$NSS_ENABLED$MBEDTLS_ENABLED$WOLFSSL_ENABLED$SCHANNEL_ENABLED$SECURETRANSPORT_ENABLED$MESALINK_ENABLED$BEARSSL_ENABLED$AMISSL_ENABLED$RUSTLS_ENABLED"
in
x)
AC_MSG_WARN([SSL disabled, you will not be able to use HTTPS, FTPS, NTLM and more.])
AC_MSG_WARN([Use --with-ssl, --with-gnutls, --with-wolfssl, --with-mbedtls, --with-nss, --with-schannel, --with-secure-transport, --with-mesalink, --with-amissl or --with-bearssl to address this.])

4
docs/FAQ
View File

@ -417,8 +417,8 @@ FAQ
curl can be built to use one of the following SSL alternatives: OpenSSL,
libressl, BoringSSL, GnuTLS, wolfSSL, NSS, mbedTLS, MesaLink, Secure
Transport (native iOS/OS X), Schannel (native Windows), GSKit (native IBM
i), or BearSSL. They all have their pros and cons, and we try to maintain a
comparison of them here: https://curl.se/docs/ssl-compared.html
i), BearSSL, or Rustls. They all have their pros and cons, and we try to
maintain a comparison of them here: https://curl.se/docs/ssl-compared.html
2.4 Does curl support SOCKS (RFC 1928) ?

1
docs/libcurl/symbols-in-versions
View File

@ -806,6 +806,7 @@ CURLSSLBACKEND_NONE 7.34.0
CURLSSLBACKEND_NSS 7.34.0
CURLSSLBACKEND_OPENSSL 7.34.0
CURLSSLBACKEND_POLARSSL 7.34.0 7.69.0
CURLSSLBACKEND_RUSTLS 7.76.0
CURLSSLBACKEND_QSOSSL 7.34.0 - 7.38.1
CURLSSLBACKEND_SCHANNEL 7.34.0
CURLSSLBACKEND_SECURETRANSPORT 7.64.1

3
include/curl/curl.h
View File

@ -155,7 +155,8 @@ typedef enum {
CURLSSLBACKEND_AXTLS = 10, /* never used since 7.63.0 */
CURLSSLBACKEND_MBEDTLS = 11,
CURLSSLBACKEND_MESALINK = 12,
CURLSSLBACKEND_BEARSSL = 13
CURLSSLBACKEND_BEARSSL = 13,
CURLSSLBACKEND_RUSTLS = 14
} curl_sslbackend;
/* aliases for library clones and renames */

2
lib/Makefile.inc
View File

@ -50,6 +50,7 @@ LIB_VTLS_CFILES = \
vtls/mesalink.c \
vtls/nss.c \
vtls/openssl.c \
vtls/rustls.c \
vtls/schannel.c \
vtls/schannel_verify.c \
vtls/sectransp.c \
@ -66,6 +67,7 @@ LIB_VTLS_HFILES = \
vtls/mesalink.h \
vtls/nssg.h \
vtls/openssl.h \
vtls/rustls.h \
vtls/schannel.h \
vtls/sectransp.h \
vtls/vtls.h \

2
lib/curl_setup.h
View File

@ -616,7 +616,7 @@ int netware_init(void);
defined(USE_MBEDTLS) || \
defined(USE_WOLFSSL) || defined(USE_SCHANNEL) || \
defined(USE_SECTRANSP) || defined(USE_GSKIT) || defined(USE_MESALINK) || \
defined(USE_BEARSSL)
defined(USE_BEARSSL) || defined(USE_RUSTLS)
#define USE_SSL /* SSL support has been enabled */
#endif

2
lib/http.c
View File

@ -1552,7 +1552,7 @@ static int https_getsock(struct Curl_easy *data,
{
(void)data;
if(conn->handler->flags & PROTOPT_SSL)
return Curl_ssl_getsock(conn, socks);
return Curl_ssl->getsock(conn, socks);
return GETSOCK_BLANK;
}
#endif /* USE_SSL */

2
lib/multi.c
View File

@ -905,7 +905,7 @@ static int waitconnect_getsock(struct connectdata *conn,
#ifdef USE_SSL
#ifndef CURL_DISABLE_PROXY
if(CONNECT_FIRSTSOCKET_PROXY_SSL())
return Curl_ssl_getsock(conn, sock);
return Curl_ssl->getsock(conn, sock);
#endif
#endif

496
lib/vtls/rustls.c Normal file
View File

@ -0,0 +1,496 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2020, Jacob Hoffman-Andrews, <github@hoffman-andrews.com>
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#ifdef USE_RUSTLS
#include "curl_printf.h"
#include <errno.h>
#include <crustls.h>
#include "urldata.h"
#include "sendf.h"
#include "vtls.h"
#include "select.h"
#include "multiif.h"
struct ssl_backend_data
{
const struct rustls_client_config *config;
struct rustls_client_session *session;
bool data_pending;
};
/* For a given rustls_result error code, return the best-matching CURLcode. */
static CURLcode map_error(rustls_result r)
{
if(rustls_result_is_cert_error(r)) {
return CURLE_PEER_FAILED_VERIFICATION;
}
switch(r) {
case RUSTLS_RESULT_OK:
return CURLE_OK;
case RUSTLS_RESULT_NULL_PARAMETER:
return CURLE_BAD_FUNCTION_ARGUMENT;
default:
return CURLE_READ_ERROR;
}
}
static bool
cr_data_pending(const struct connectdata *conn, int sockindex)
{
struct Curl_easy *data = conn->data;
const struct ssl_connect_data *connssl = &conn->ssl[sockindex];
struct ssl_backend_data *backend = connssl->backend;
infof(data, "rustls_data_pending %d\n", backend->data_pending);
return backend->data_pending;
}
static CURLcode
cr_connect(struct Curl_easy *data UNUSED_PARAM,
struct connectdata *conn UNUSED_PARAM,
int sockindex UNUSED_PARAM)
{
infof(data, "rustls_connect: unimplemented\n");
return CURLE_SSL_CONNECT_ERROR;
}
/*
* On each run:
* - Read a chunk of bytes from the socket into rustls' TLS input buffer.
* - Tell rustls to process any new packets.
* - Read out as many plaintext bytes from rustls as possible, until hitting
* error, EOF, or EAGAIN/EWOULDBLOCK, or plainbuf/plainlen is filled up.
*
* It's okay to call this function with plainbuf == NULL and plainlen == 0.
* In that case, it will copy bytes from the socket into rustls' TLS input
* buffer, and process packets, but won't consume bytes from rustls' plaintext
* output buffer.
*/
static ssize_t
cr_recv(struct Curl_easy *data, int sockindex,
char *plainbuf, size_t plainlen, CURLcode *err)
{
struct connectdata *conn = data->conn;
struct ssl_connect_data *const connssl = &conn->ssl[sockindex];
struct ssl_backend_data *const backend = connssl->backend;
struct rustls_client_session *const session = backend->session;
curl_socket_t sockfd = conn->sock[sockindex];
/* Per https://www.bearssl.org/api1.html, max TLS record size plus max
per-record overhead. */
uint8_t tlsbuf[16384 + 325];
size_t n = 0;
ssize_t tls_bytes_read = 0;
size_t tls_bytes_processed = 0;
size_t plain_bytes_copied = 0;
rustls_result rresult = 0;
char errorbuf[255];
tls_bytes_read = sread(sockfd, tlsbuf, sizeof(tlsbuf));
if(tls_bytes_read == 0) {
failf(data, "EOF in sread");
*err = CURLE_READ_ERROR;
return -1;
}
else if(tls_bytes_read < 0) {
if(SOCKERRNO == EAGAIN || SOCKERRNO == EWOULDBLOCK) {
infof(data, "sread: EAGAIN or EWOULDBLOCK\n");
*err = CURLE_AGAIN;
return -1;
}
failf(data, "reading from socket: %s", strerror(SOCKERRNO));
*err = CURLE_READ_ERROR;
return -1;
}
/*
* Now pull those bytes from the buffer into ClientSession.
*/
DEBUGASSERT(tls_bytes_read > 0);
while(tls_bytes_processed < (size_t)tls_bytes_read) {
rresult = rustls_client_session_read_tls(session,
(uint8_t *)tlsbuf + tls_bytes_processed,
tls_bytes_read - tls_bytes_processed,
&n);
if(rresult != RUSTLS_RESULT_OK) {
failf(data, "error in rustls_client_session_read_tls");
*err = CURLE_READ_ERROR;
return -1;
}
else if(n == 0) {
infof(data, "EOF from rustls_client_session_read_tls\n");
break;
}
rresult = rustls_client_session_process_new_packets(session);
if(rresult != RUSTLS_RESULT_OK) {
rustls_error(rresult, errorbuf, sizeof(errorbuf), &n);
failf(data, "%.*s", n, errorbuf);
*err = map_error(rresult);
return -1;
}
tls_bytes_processed += n;
backend->data_pending = TRUE;
}
while(plain_bytes_copied < plainlen) {
rresult = rustls_client_session_read(session,
(uint8_t *)plainbuf + plain_bytes_copied,
plainlen - plain_bytes_copied,
&n);
if(rresult != RUSTLS_RESULT_OK) {
failf(data, "error in rustls_client_session_read");
*err = CURLE_READ_ERROR;
return -1;
}
else if(n == 0) {
/* rustls returns 0 from client_session_read to mean "all currently
available data has been read." If we bring in more ciphertext with
read_tls, more plaintext will become available. So don't tell curl
this is an EOF. Instead, say "come back later." */
infof(data, "EOF from rustls_client_session_read\n");
backend->data_pending = FALSE;
break;
}
else {
plain_bytes_copied += n;
}
}
/* If we wrote out 0 plaintext bytes, it might just mean we haven't yet
read a full TLS record. Return CURLE_AGAIN so curl doesn't treat this
as EOF. */
if(plain_bytes_copied == 0) {
*err = CURLE_AGAIN;
return -1;
}
return plain_bytes_copied;
}
/*
* On each call:
* - Copy `plainlen` bytes into rustls' plaintext input buffer (if > 0).
* - Fully drain rustls' plaintext output buffer into the socket until
* we get either an error or EAGAIN/EWOULDBLOCK.
*
* It's okay to call this function with plainbuf == NULL and plainlen == 0.
* In that case, it won't read anything into rustls' plaintext input buffer.
* It will only drain rustls' plaintext output buffer into the socket.
*/
static ssize_t
cr_send(struct Curl_easy *data, int sockindex,
const void *plainbuf, size_t plainlen, CURLcode *err)
{
struct connectdata *conn = data->conn;
struct ssl_connect_data *const connssl = &conn->ssl[sockindex];
struct ssl_backend_data *const backend = connssl->backend;
struct rustls_client_session *const session = backend->session;
curl_socket_t sockfd = conn->sock[sockindex];
ssize_t n = 0;
size_t plainwritten = 0;
size_t tlslen = 0;
size_t tlswritten = 0;
/* Max size of a TLS message, plus some space for TLS framing overhead. */
uint8_t tlsbuf[16384 + 325];
rustls_result rresult;
if(plainlen > 0) {
rresult = rustls_client_session_write(session,
plainbuf, plainlen, &plainwritten);
if(rresult != RUSTLS_RESULT_OK) {
failf(data, "error in rustls_client_session_write");
*err = CURLE_WRITE_ERROR;
return -1;
}
else if(plainwritten == 0) {
failf(data, "EOF in rustls_client_session_write");
*err = CURLE_WRITE_ERROR;
return -1;
}
}
while(rustls_client_session_wants_write(session)) {
rresult = rustls_client_session_write_tls(
session, tlsbuf, sizeof(tlsbuf), &tlslen);
if(rresult != RUSTLS_RESULT_OK) {
failf(data, "error in rustls_client_session_write_tls");
*err = CURLE_WRITE_ERROR;
return -1;
}
else if(tlslen == 0) {
failf(data, "EOF in rustls_client_session_write_tls");
*err = CURLE_WRITE_ERROR;
return -1;
}
tlswritten = 0;
while(tlswritten < tlslen) {
n = swrite(sockfd, tlsbuf + tlswritten, tlslen - tlswritten);
if(n < 0) {
if(SOCKERRNO == EAGAIN || SOCKERRNO == EWOULDBLOCK) {
/* Since recv is called from poll, there should be room to
write at least some bytes before hitting EAGAIN. */
infof(data, "swrite: EAGAIN after %ld bytes\n", tlswritten);
DEBUGASSERT(tlswritten > 0);
break;
}
failf(data, "error in swrite");
*err = CURLE_WRITE_ERROR;
return -1;
}
if(n == 0) {
failf(data, "EOF in swrite");
*err = CURLE_WRITE_ERROR;
return -1;
}
tlswritten += n;
}
DEBUGASSERT(tlswritten <= tlslen);
}
return plainwritten;
}
static CURLcode
cr_connect_nonblocking(struct Curl_easy *data, struct connectdata *conn,
int sockindex, bool *done)
{
struct ssl_connect_data *const connssl = &conn->ssl[sockindex];
curl_socket_t sockfd = conn->sock[sockindex];
struct ssl_backend_data *const backend = connssl->backend;
struct rustls_client_session *session = backend->session;
struct rustls_client_config_builder *config_builder = NULL;
const char *const ssl_cafile = SSL_CONN_CONFIG(CAfile);
CURLcode tmperr = CURLE_OK;
int result;
int what;
bool wants_read;
bool wants_write;
curl_socket_t writefd;
curl_socket_t readfd;
char errorbuf[256];
size_t errorlen;
if(ssl_connection_none == connssl->state) {
config_builder = rustls_client_config_builder_new();
if(ssl_cafile) {
result = rustls_client_config_builder_load_roots_from_file(
config_builder, ssl_cafile);
if(result != RUSTLS_RESULT_OK) {
failf(data, "failed to load trusted certificates");
rustls_client_config_free(
rustls_client_config_builder_build(config_builder));
return CURLE_SSL_CACERT_BADFILE;
}
}
else {
result = rustls_client_config_builder_load_native_roots(config_builder);
if(result != RUSTLS_RESULT_OK) {
failf(data, "failed to load trusted certificates");
rustls_client_config_free(
rustls_client_config_builder_build(config_builder));
return CURLE_SSL_CACERT_BADFILE;
}
}
backend->config = rustls_client_config_builder_build(config_builder);
DEBUGASSERT(session == NULL);
result = rustls_client_session_new(
backend->config, conn->host.name, &session);
if(result != RUSTLS_RESULT_OK) {
rustls_error(result, errorbuf, sizeof(errorbuf), &errorlen);
failf(data, "failed to create client session: %.*s", errorlen, errorbuf);
return CURLE_COULDNT_CONNECT;
}
backend->session = session;
connssl->state = ssl_connection_negotiating;
}
/* Read/write data until the handshake is done or the socket would block. */
for(;;) {
/*
* Connection has been established according to rustls. Set send/recv
* handlers, and update the state machine.
* This check has to come last because is_handshaking starts out false,
* then becomes true when we first write data, then becomes false again
* once the handshake is done.
*/
if(!rustls_client_session_is_handshaking(session)) {
infof(data, "Done handshaking\n");
/* Done with the handshake. Set up callbacks to send/receive data. */
connssl->state = ssl_connection_complete;
conn->recv[sockindex] = cr_recv;
conn->send[sockindex] = cr_send;
*done = TRUE;
return CURLE_OK;
}
wants_read = rustls_client_session_wants_read(session);
wants_write = rustls_client_session_wants_write(session);
DEBUGASSERT(wants_read || wants_write);
writefd = wants_write?sockfd:CURL_SOCKET_BAD;
readfd = wants_read?sockfd:CURL_SOCKET_BAD;
what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd, 0);
if(what < 0) {
/* fatal error */
failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
return CURLE_SSL_CONNECT_ERROR;
}
if(0 == what) {
infof(data, "Curl_socket_check: %s would block\n",
wants_read&&wants_write ?
"writing and reading" :
wants_write ?
"writing" :
"reading");
*done = FALSE;
return CURLE_OK;
}
/* socket is readable or writable */
if(wants_write) {
infof(data, "ClientSession wants us to write_tls.\n");
cr_send(data, sockindex, NULL, 0, &tmperr);
if(tmperr == CURLE_AGAIN) {
infof(data, "writing would block\n");
/* fall through */
}
else if(tmperr != CURLE_OK) {
return tmperr;
}
}
if(wants_read) {
infof(data, "ClientSession wants us to read_tls.\n");
cr_recv(data, sockindex, NULL, 0, &tmperr);
if(tmperr == CURLE_AGAIN) {
infof(data, "reading would block\n");
/* fall through */
}
else if(tmperr != CURLE_OK) {
if(tmperr == CURLE_READ_ERROR) {
return CURLE_SSL_CONNECT_ERROR;
}
else {
return tmperr;
}
}
}
}
/* We should never fall through the loop. We should return either because
the handshake is done or because we can't read/write without blocking. */
DEBUGASSERT(false);
}
/* returns a bitmap of flags for this connection's first socket indicating
whether we want to read or write */
static int
cr_getsock(struct connectdata *conn, curl_socket_t *socks)
{
struct ssl_connect_data *const connssl = &conn->ssl[FIRSTSOCKET];
curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
struct ssl_backend_data *const backend = connssl->backend;
struct rustls_client_session *session = backend->session;
if(rustls_client_session_wants_write(session)) {
socks[0] = sockfd;
return GETSOCK_WRITESOCK(0);
}
if(rustls_client_session_wants_read(session)) {
socks[0] = sockfd;
return GETSOCK_READSOCK(0);
}
return GETSOCK_BLANK;
}
static void *
cr_get_internals(struct ssl_connect_data *connssl,
CURLINFO info UNUSED_PARAM)
{
struct ssl_backend_data *backend = connssl->backend;
return &backend->session;
}
static void
cr_close(struct Curl_easy *data, struct connectdata *conn,
int sockindex)
{
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
struct ssl_backend_data *backend = connssl->backend;
CURLcode tmperr = CURLE_OK;
ssize_t n = 0;
if(backend->session) {
rustls_client_session_send_close_notify(backend->session);
n = cr_send(data, sockindex, NULL, 0, &tmperr);
if(n < 0) {
failf(data, "error sending close notify: %d", tmperr);
}
rustls_client_session_free(backend->session);
backend->session = NULL;
}
if(backend->config) {
rustls_client_config_free(backend->config);
backend->config = NULL;
}
}
const struct Curl_ssl Curl_ssl_rustls = {
{ CURLSSLBACKEND_RUSTLS, "rustls" },
SSLSUPP_TLS13_CIPHERSUITES, /* supports */
sizeof(struct ssl_backend_data),
Curl_none_init, /* init */
Curl_none_cleanup, /* cleanup */
rustls_version, /* version */
Curl_none_check_cxn, /* check_cxn */
Curl_none_shutdown, /* shutdown */
cr_data_pending, /* data_pending */
Curl_none_random, /* random */
Curl_none_cert_status_request, /* cert_status_request */
cr_connect, /* connect */
cr_connect_nonblocking, /* connect_nonblocking */
cr_getsock, /* cr_getsock */
cr_get_internals, /* get_internals */
cr_close, /* close_one */
Curl_none_close_all, /* close_all */
Curl_none_session_free, /* session_free */
Curl_none_set_engine, /* set_engine */
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
NULL /* sha256sum */
};
#endif /* USE_RUSTLS */

32
lib/vtls/rustls.h Normal file
View File

@ -0,0 +1,32 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2020, Jacob Hoffman-Andrews, <github@hoffman-andrews.com>
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#ifndef HEADER_CURL_RUSTLS_H
#define HEADER_CURL_RUSTLS_H
#include "curl_setup.h"
#ifdef USE_RUSTLS
extern const struct Curl_ssl Curl_ssl_rustls;
#endif /* USE_RUSTLS */
#endif /* HEADER_CURL_RUSTLS_H */

5
lib/vtls/vtls.c
View File

@ -1222,6 +1222,8 @@ const struct Curl_ssl *Curl_ssl =
&Curl_ssl_mbedtls;
#elif defined(USE_NSS)
&Curl_ssl_nss;
#elif defined(USE_RUSTLS)
&Curl_ssl_rustls;
#elif defined(USE_OPENSSL)
&Curl_ssl_openssl;
#elif defined(USE_SCHANNEL)
@ -1264,6 +1266,9 @@ static const struct Curl_ssl *available_backends[] = {
#endif
#if defined(USE_BEARSSL)
&Curl_ssl_bearssl,
#endif
#if defined(USE_RUSTLS)
&Curl_ssl_rustls,
#endif
NULL
};

1
lib/vtls/vtls.h
View File

@ -116,6 +116,7 @@ bool Curl_ssl_tls13_ciphersuites(void);
#include "mbedtls.h" /* mbedTLS versions */
#include "mesalink.h" /* MesaLink versions */
#include "bearssl.h" /* BearSSL versions */
#include "rustls.h" /* rustls versions */
#ifndef MAX_PINNED_PUBKEY_SIZE
#define MAX_PINNED_PUBKEY_SIZE 1048576 /* 1MB */