*/
#include <sys/types.h>
+#include <sys/random.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include "ustream-ssl.h"
#include "ustream-internal.h"
+#include <psa/crypto.h>
+#include <mbedtls/debug.h>
-static int urandom_fd = -1;
+static void debug_cb(void *ctx_p, int level,
+ const char *file, int line,
+ const char *str)
+{
+ struct ustream_ssl_ctx *ctx = ctx_p;
+ const char *fstr;
+ char buf[512];
+ int len;
+
+ if (!ctx->debug_cb)
+ return;
+
+ while ((fstr = strstr(file + 1, "library/")) != NULL)
+ file = fstr;
+
+ len = snprintf(buf, sizeof(buf), "%s:%04d: %s", file, line, str);
+ if (len >= (int)sizeof(buf))
+ len = (int)sizeof(buf) - 1;
+ if (buf[len - 1] == '\n')
+ buf[len - 1] = 0;
+ ctx->debug_cb(ctx->debug_cb_priv, level, buf);
+}
static int s_ustream_read(void *ctx, unsigned char *buf, size_t len)
{
return 0;
sbuf = ustream_get_read_buf(s, &slen);
- if (slen > len)
+ if ((size_t) slen > len)
slen = len;
if (!slen)
return ret;
}
-__hidden void ustream_set_io(struct ustream_ssl_ctx *ctx, void *ssl, struct ustream *conn)
+static int s_fd_read(void *ctx, unsigned char *buf, size_t len)
{
- mbedtls_ssl_set_bio(ssl, conn, s_ustream_write, s_ustream_read, NULL);
+ struct uloop_fd *ufd = ctx;
+ mbedtls_net_context net = {
+ .fd = ufd->fd
+ };
+
+ return mbedtls_net_recv(&net, buf, len);
}
-static bool urandom_init(void)
+static int s_fd_write(void *ctx, const unsigned char *buf, size_t len)
{
- if (urandom_fd > -1)
- return true;
+ struct uloop_fd *ufd = ctx;
+ mbedtls_net_context net = {
+ .fd = ufd->fd
+ };
- urandom_fd = open("/dev/urandom", O_RDONLY);
- if (urandom_fd < 0)
- return false;
+ return mbedtls_net_send(&net, buf, len);
+}
- return true;
+__hidden void ustream_set_io(struct ustream_ssl *us)
+{
+ if (us->conn)
+ mbedtls_ssl_set_bio(us->ssl, us->conn, s_ustream_write, s_ustream_read, NULL);
+ else
+ mbedtls_ssl_set_bio(us->ssl, &us->fd, s_fd_write, s_fd_read, NULL);
}
-static int _urandom(void *ctx, unsigned char *out, size_t len)
+static int _random(void *ctx, unsigned char *out, size_t len)
{
- if (read(urandom_fd, out, len) < 0)
+#ifdef linux
+ if (getrandom(out, len, 0) != (ssize_t) len)
return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
+#else
+ static FILE *f;
+
+ if (!f)
+ f = fopen("/dev/urandom", "r");
+ if (fread(out, len, 1, f) != 1)
+ return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
+#endif
return 0;
}
static const int default_ciphersuites_server[] =
{
+#ifdef MBEDTLS_SSL_PROTO_TLS1_3
+ MBEDTLS_TLS1_3_CHACHA20_POLY1305_SHA256,
+ MBEDTLS_TLS1_3_AES_256_GCM_SHA384,
+ MBEDTLS_TLS1_3_AES_128_GCM_SHA256,
+ MBEDTLS_TLS1_3_AES_128_CCM_SHA256,
+ MBEDTLS_TLS1_3_AES_128_CCM_8_SHA256,
+#endif
+
MBEDTLS_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
AES_GCM_CIPHERS(ECDHE_ECDSA),
MBEDTLS_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
static const int default_ciphersuites_client[] =
{
+#ifdef MBEDTLS_SSL_PROTO_TLS1_3
+ MBEDTLS_TLS1_3_CHACHA20_POLY1305_SHA256,
+ MBEDTLS_TLS1_3_AES_256_GCM_SHA384,
+ MBEDTLS_TLS1_3_AES_128_GCM_SHA256,
+ MBEDTLS_TLS1_3_AES_128_CCM_SHA256,
+ MBEDTLS_TLS1_3_AES_128_CCM_8_SHA256,
+#endif
+
MBEDTLS_TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
AES_GCM_CIPHERS(ECDHE_ECDSA),
MBEDTLS_TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
AES_CBC_CIPHERS(ECDHE_ECDSA),
AES_CBC_CIPHERS(ECDHE_RSA),
AES_CBC_CIPHERS(DHE_RSA),
+/* Removed in Mbed TLS 3.0.0 */
+#ifdef MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
MBEDTLS_TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA,
+#endif
AES_CIPHERS(RSA),
+/* Removed in Mbed TLS 3.0.0 */
+#ifdef MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA
MBEDTLS_TLS_RSA_WITH_3DES_EDE_CBC_SHA,
+#endif
0
};
mbedtls_ssl_config *conf;
int ep;
- if (!urandom_init())
- return NULL;
+#ifdef MBEDTLS_PSA_CRYPTO_C
+ static bool psa_init;
+
+ if (!psa_init && !psa_crypto_init())
+ psa_init = true;
+#endif
ctx = calloc(1, sizeof(*ctx));
if (!ctx)
mbedtls_ssl_config_defaults(conf, ep, MBEDTLS_SSL_TRANSPORT_STREAM,
MBEDTLS_SSL_PRESET_DEFAULT);
- mbedtls_ssl_conf_authmode(conf, MBEDTLS_SSL_VERIFY_NONE);
- mbedtls_ssl_conf_rng(conf, _urandom, NULL);
+ mbedtls_ssl_conf_rng(conf, _random, NULL);
if (server) {
+ mbedtls_ssl_conf_authmode(conf, MBEDTLS_SSL_VERIFY_NONE);
mbedtls_ssl_conf_ciphersuites(conf, default_ciphersuites_server);
mbedtls_ssl_conf_min_version(conf, MBEDTLS_SSL_MAJOR_VERSION_3,
MBEDTLS_SSL_MINOR_VERSION_3);
- } else
+ } else {
+ mbedtls_ssl_conf_authmode(conf, MBEDTLS_SSL_VERIFY_OPTIONAL);
mbedtls_ssl_conf_ciphersuites(conf, default_ciphersuites_client);
+ }
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_conf_session_cache(conf, &ctx->cache,
if (!ctx->cert.version)
return;
- if (!ctx->key.pk_info)
+ if (mbedtls_pk_get_type(&ctx->key) == MBEDTLS_PK_NONE)
return;
mbedtls_ssl_conf_own_cert(&ctx->conf, &ctx->cert, &ctx->key);
{
int ret;
+#if (MBEDTLS_VERSION_NUMBER >= 0x03000000)
+ ret = mbedtls_pk_parse_keyfile(&ctx->key, file, NULL, _random, NULL);
+#else
ret = mbedtls_pk_parse_keyfile(&ctx->key, file, NULL);
+#endif
if (ret)
return -1;
return 0;
}
+__hidden int __ustream_ssl_set_ciphers(struct ustream_ssl_ctx *ctx, const char *ciphers)
+{
+ int *ciphersuites = NULL, *tmp, id;
+ char *cipherstr, *p, *last, c;
+ size_t len = 0;
+
+ if (ciphers == NULL)
+ return -1;
+
+ cipherstr = strdup(ciphers);
+
+ if (cipherstr == NULL)
+ return -1;
+
+ for (p = cipherstr, last = p;; p++) {
+ if (*p == ':' || *p == 0) {
+ c = *p;
+ *p = 0;
+
+ id = mbedtls_ssl_get_ciphersuite_id(last);
+
+ if (id != 0) {
+ tmp = realloc(ciphersuites, (len + 2) * sizeof(int));
+
+ if (tmp == NULL) {
+ free(ciphersuites);
+ free(cipherstr);
+
+ return -1;
+ }
+
+ ciphersuites = tmp;
+ ciphersuites[len++] = id;
+ ciphersuites[len] = 0;
+ }
+
+ if (c == 0)
+ break;
+
+ last = p + 1;
+ }
+
+ /*
+ * mbedTLS expects cipher names with dashes while many sources elsewhere
+ * like the Firefox wiki or Wireshark specify ciphers with underscores,
+ * so simply convert all underscores to dashes to accept both notations.
+ */
+ else if (*p == '_') {
+ *p = '-';
+ }
+ }
+
+ free(cipherstr);
+
+ if (len == 0)
+ return -1;
+
+ mbedtls_ssl_conf_ciphersuites(&ctx->conf, ciphersuites);
+ free(ctx->ciphersuites);
+
+ ctx->ciphersuites = ciphersuites;
+
+ return 0;
+}
+
+__hidden int __ustream_ssl_set_require_validation(struct ustream_ssl_ctx *ctx, bool require)
+{
+ int mode = MBEDTLS_SSL_VERIFY_OPTIONAL;
+
+ if (!require)
+ mode = MBEDTLS_SSL_VERIFY_NONE;
+
+ /* force TLS 1.2 when not requiring validation for now */
+ if (!require && !ctx->server)
+ mbedtls_ssl_conf_max_version(&ctx->conf, MBEDTLS_SSL_MAJOR_VERSION_3,
+ MBEDTLS_SSL_MINOR_VERSION_3);
+ mbedtls_ssl_conf_authmode(&ctx->conf, mode);
+
+ return 0;
+}
+
__hidden void __ustream_ssl_context_free(struct ustream_ssl_ctx *ctx)
{
+ free(ctx->session_data);
#if defined(MBEDTLS_SSL_CACHE_C)
mbedtls_ssl_cache_free(&ctx->cache);
#endif
mbedtls_x509_crt_free(&ctx->ca_cert);
mbedtls_x509_crt_free(&ctx->cert);
mbedtls_ssl_config_free(&ctx->conf);
+ free(ctx->ciphersuites);
free(ctx);
}
uloop_timeout_set(&us->error_timer, 0);
}
-static bool ssl_do_wait(int ret)
+#ifdef MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET
+static void
+__ustream_ssl_save_session(struct ustream_ssl *us)
+{
+ struct ustream_ssl_ctx *ctx = us->ctx;
+ mbedtls_ssl_session sess;
+
+ if (ctx->server)
+ return;
+
+ free(ctx->session_data);
+ ctx->session_data = NULL;
+
+ mbedtls_ssl_session_init(&sess);
+ if (mbedtls_ssl_get_session(us->ssl, &sess) != 0)
+ return;
+
+ mbedtls_ssl_session_save(&sess, NULL, 0, &ctx->session_data_len);
+ ctx->session_data = malloc(ctx->session_data_len);
+ if (mbedtls_ssl_session_save(&sess, ctx->session_data, ctx->session_data_len,
+ &ctx->session_data_len))
+ ctx->session_data_len = 0;
+ mbedtls_ssl_session_free(&sess);
+}
+#endif
+
+static int ssl_check_return(struct ustream_ssl *us, int ret)
{
switch(ret) {
case MBEDTLS_ERR_SSL_WANT_READ:
case MBEDTLS_ERR_SSL_WANT_WRITE:
- return true;
+ return U_SSL_PENDING;
+#ifdef MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET
+ case MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET:
+ __ustream_ssl_save_session(us);
+ return U_SSL_RETRY;
+#endif
+#ifdef MBEDTLS_ECP_RESTARTABLE
+ case MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS:
+ return U_SSL_RETRY;
+#endif
+ case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
+ case MBEDTLS_ERR_NET_CONN_RESET:
+ return 0;
default:
- return false;
+ ustream_ssl_error(us, ret);
+ return U_SSL_ERROR;
}
}
void *ssl = us->ssl;
int r;
- r = mbedtls_ssl_handshake(ssl);
- if (r == 0) {
- ustream_ssl_verify_cert(us);
- return U_SSL_OK;
- }
+ do {
+ r = mbedtls_ssl_handshake(ssl);
+ if (r == 0) {
+ ustream_ssl_verify_cert(us);
+ return U_SSL_OK;
+ }
- if (ssl_do_wait(r))
- return U_SSL_PENDING;
+ r = ssl_check_return(us, r);
+ } while (r == U_SSL_RETRY);
- ustream_ssl_error(us, r);
- return U_SSL_ERROR;
+ return r;
}
__hidden int __ustream_ssl_write(struct ustream_ssl *us, const char *buf, int len)
while (done != len) {
ret = mbedtls_ssl_write(ssl, (const unsigned char *) buf + done, len - done);
-
if (ret < 0) {
- if (ssl_do_wait(ret))
+ ret = ssl_check_return(us, ret);
+ if (ret == U_SSL_RETRY)
+ continue;
+
+ if (ret == U_SSL_PENDING)
return done;
- ustream_ssl_error(us, ret);
return -1;
}
__hidden int __ustream_ssl_read(struct ustream_ssl *us, char *buf, int len)
{
- int ret = mbedtls_ssl_read(us->ssl, (unsigned char *) buf, len);
-
- if (ret < 0) {
- if (ssl_do_wait(ret))
- return U_SSL_PENDING;
+ int ret;
- if (ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY)
- return 0;
+ do {
+ ret = mbedtls_ssl_read(us->ssl, (unsigned char *) buf, len);
+ if (ret >= 0)
+ return ret;
- ustream_ssl_error(us, ret);
- return U_SSL_ERROR;
- }
+ ret = ssl_check_return(us, ret);
+ } while (ret == U_SSL_RETRY);
return ret;
}
+__hidden void __ustream_ssl_set_debug(struct ustream_ssl_ctx *ctx, int level,
+ ustream_ssl_debug_cb cb, void *cb_priv)
+{
+ ctx->debug_cb = cb;
+ ctx->debug_cb_priv = cb_priv;
+ mbedtls_ssl_conf_dbg(&ctx->conf, debug_cb, ctx);
+#ifdef MBEDTLS_DEBUG_C
+ mbedtls_debug_set_threshold(level);
+#endif
+}
+
__hidden void *__ustream_ssl_session_new(struct ustream_ssl_ctx *ctx)
{
mbedtls_ssl_context *ssl;
+ mbedtls_ssl_session sess;
ssl = calloc(1, sizeof(*ssl));
if (!ssl)
return NULL;
}
+ if (!ctx->session_data_len)
+ return ssl;
+
+ mbedtls_ssl_session_init(&sess);
+ if (mbedtls_ssl_session_load(&sess, ctx->session_data, ctx->session_data_len) == 0)
+ mbedtls_ssl_set_session(ssl, &sess);
+
return ssl;
}
-__hidden void __ustream_ssl_session_free(void *ssl)
+__hidden void __ustream_ssl_session_free(struct ustream_ssl *us)
{
- mbedtls_ssl_free(ssl);
- free(ssl);
+ mbedtls_ssl_free(us->ssl);
+ free(us->ssl);
}
projects / project / ustream-ssl.git / blobdiff