1 files changed, 78 insertions, 0 deletions
diff --git a/src/stls/stls_client_init_and_handshake.c b/src/stls/stls_client_init_and_handshake.c
new file mode 100644
index 0000000..e207d8c
--- /dev/null
+++ b/src/stls/stls_client_init_and_handshake.c
@@ -0,0 +1,78 @@
+/* ISC license. */
+
+#include <stdlib.h>
+
+#include <tls.h>
+
+#include <skalibs/strerr2.h>
+
+#include <s6-networking/stls.h>
+#include "stls-internal.h"
+
+#define diecfg(cfg, s) strerr_diefu3x(96, (s), ": ", tls_config_error(cfg))
+#define diectx(e, ctx, s) strerr_diefu3x(e, (s), ": ", tls_error(ctx))
+
+struct tls *stls_client_init_and_handshake (int const *fds, uint32_t preoptions, char const *servername)
+{
+  struct tls *ctx ;
+  struct tls_config *cfg ;
+  char const *x ;
+
+  if (tls_init() < 0) strerr_diefu1sys(111, "tls_init") ;
+  cfg = tls_config_new() ;
+  if (!cfg) strerr_diefu1sys(111, "tls_config_new") ;
+
+  x = getenv("CADIR") ;
+  if (x)
+  {
+    if (tls_config_set_ca_path(cfg, x) < 0)
+      diecfg(cfg, "tls_config_set_ca_path") ;
+  }
+  else
+  {
+    x = getenv("CAFILE") ;
+    if (x)
+    {
+      if (tls_config_set_ca_file(cfg, x) < 0)
+        diecfg(cfg, "tls_config_set_ca_file") ;
+    }
+    else strerr_dief1x(100, "no trust anchor found - please set CADIR or CAFILE") ;
+  }
+
+  if (preoptions & 1)
+  {
+    x = getenv("CERTFILE") ;
+    if (!x) strerr_dienotset(100, "CERTFILE") ;
+    if (tls_config_set_cert_file(cfg, x) < 0)
+      diecfg(cfg, "tls_config_set_cert_file") ;
+
+    x = getenv("KEYFILE") ;
+    if (!x) strerr_dienotset(100, "KEYFILE") ;
+    if (tls_config_set_key_file(cfg, x) < 0)
+      diecfg(cfg, "tls_config_set_key_file") ;
+  }
+
+  if (tls_config_set_ciphers(cfg, "secure") < 0)
+    diecfg(cfg, "tls_config_set_ciphers") ;
+
+  if (tls_config_set_dheparams(cfg, "auto") < 0)
+    diecfg(cfg, "tls_config_set_dheparams") ;
+
+  if (tls_config_set_ecdhecurve(cfg, "auto") < 0)
+    diecfg(cfg, "tls_config_set_ecdhecurve") ;
+
+  tls_config_verify(cfg) ;
+  tls_config_set_protocols(cfg, TLS_PROTOCOLS_ALL) ;
+  tls_config_prefer_ciphers_server(cfg) ;
+  if (!servername) tls_config_insecure_noverifyname(cfg) ;
+
+  ctx = tls_client() ;
+  if (!ctx) strerr_diefu1sys(111, "tls_client") ;
+  if (tls_configure(ctx, cfg) < 0) diectx(97, ctx, "tls_configure") ;
+
+  if (tls_connect_fds(ctx, fds[0], fds[1], servername) < 0)
+    diectx(97, ctx, "tls_connect_fds") ;
+  tls_config_free(cfg) ;
+  if (tls_handshake(ctx) < 0) diectx(97, ctx, "perform SSL handshake") ;
+  return ctx ;
+}