1 files changed, 31 insertions, 0 deletions
diff --git a/src/sbearssl/sbearssl_send_environment.c b/src/sbearssl/sbearssl_send_environment.c
new file mode 100644
index 0000000..3e1f1e1
--- /dev/null
+++ b/src/sbearssl/sbearssl_send_environment.c
@@ -0,0 +1,31 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <skalibs/buffer.h>
+
+#include <bearssl.h>
+
+#include <s6-networking/sbearssl.h>
+
+int sbearssl_send_environment (br_ssl_engine_context *ctx, int fd)
+{
+  char buf[4096] ;
+  buffer b = BUFFER_INIT(&buffer_write, fd, buf, 4096) ;
+  unsigned int v = br_ssl_engine_get_version(ctx) ;
+  char const *suite ;
+  br_ssl_session_parameters params ;
+
+  br_ssl_engine_get_session_parameters(ctx, &params) ;
+  suite = sbearssl_suite_name(&params) ;
+  byte_zzero((char *)params.master_secret, 48) ;
+  if (!suite) suite = "" ;
+
+  if (buffer_puts(&b, "SSL_PROTOCOL=") < 0
+   || buffer_puts(&b, v == BR_TLS12 ? "TLSv1.2" : v == BR_TLS11 ? "TLSv1.1" : v == BR_TLS10 ? "TLSv1" : "unknown") < 0
+   || buffer_put(&b, "", 1) < 0
+   || buffer_puts(&b, "SSL_CIPHER=") < 0
+   || buffer_puts(&b, suite) < 0
+   || buffer_putflush(&b, "\0", 2) < 0)
+    return 0 ;
+  return 1 ;
+}