Implement TLS using OpenSSL.

1 files changed, 41 insertions, 0 deletions

diff --git a/sockets.c b/sockets.c
index 40079c2..142be21 100644
--- a/sockets.c
+++ b/sockets.c
@@ -126,3 +126,44 @@ int createclientsocket(char *listenport) {
 
   return listener;
 }
+
+void init_openssl() {
+  SSL_load_error_strings();
+  OpenSSL_add_ssl_algorithms();
+}
+
+
+void cleanup_openssl() {
+  EVP_cleanup();
+}
+
+SSL_CTX *create_context() {
+  const SSL_METHOD *method;
+  SSL_CTX *ctx;
+
+  method = SSLv23_server_method();
+
+  ctx = SSL_CTX_new(method);
+  if (!ctx) {
+    perror("Unable to create SSL context");
+    ERR_print_errors_fp(stderr);
+    exit(EXIT_FAILURE);
+  }
+
+  return ctx;
+}
+
+void configure_context(SSL_CTX *ctx) {
+  SSL_CTX_set_ecdh_auto(ctx, 1);
+
+  /* Set the key and cert */
+  if (SSL_CTX_use_certificate_file(ctx, "cert.pem", SSL_FILETYPE_PEM) <= 0) {
+    ERR_print_errors_fp(stderr);
+    exit(EXIT_FAILURE);
+  }
+
+  if (SSL_CTX_use_PrivateKey_file(ctx, "key.pem", SSL_FILETYPE_PEM) <= 0 ) {
+    ERR_print_errors_fp(stderr);
+    exit(EXIT_FAILURE);
+  }
+}