src/verify.c: Print server certificate in case of an error.

[tlsproxy/tlsproxy.git] / src / verify.c

diff --git a/src/verify.c b/src/verify.c
index 6558d42866422a9a85b8f6ce4ae0fb526a20bc35..8328432b5e27e0174590c0c69cb97e92fc36c608 100644 (file)
--- a/src/verify.c
+++ b/src/verify.c
@@ -106,11 +106,12 @@ int verify_tls_connection(gnutls_session_t session, const char *hostname) {
         gnutls_x509_crt_deinit(cert);
         return -1;
     }
-    /* We got the certificate as PEM, free it. */
+    /* We got the certificate as PEM, free the crt struct. */
     gnutls_x509_crt_deinit(cert);
 
     /* Open stored server certificate file. */
     if (0 != server_certificate_path(&file, hostname, path, sizeof(path))) {
+        LOG(LOG_DEBUG, "server certificate:\n%s", server_cert);
         return -1;
     }
 
@@ -121,9 +122,10 @@ int verify_tls_connection(gnutls_session_t session, const char *hostname) {
         size += strlen(buffer);
         /* Make sure the buffer is big enough. */
         if (sizeof(stored_cert) <= size) {
-            LOG(LOG_WARNING, "verify_tls_connection(): '%s' too big",
-                path);
+            LOG(LOG_WARNING, "verify_tls_connection(): '%s' too big", path);
             fclose(file);
+
+            LOG(LOG_DEBUG, "server certificate:\n%s", server_cert);
             return -1;
         }
 
@@ -134,6 +136,8 @@ int verify_tls_connection(gnutls_session_t session, const char *hostname) {
         LOG(LOG_WARNING,
             "verify_tls_connection(): failed to read from '%s': %s",
             path, strerror(errno));
+
+        LOG(LOG_DEBUG, "server certificate:\n%s", server_cert);
         return -1;
     }
     fclose(file);
@@ -143,13 +147,16 @@ int verify_tls_connection(gnutls_session_t session, const char *hostname) {
         LOG(LOG_ERROR,
             "verify_tls_connection(): server certificate changed!",
             path, strerror(errno));
+
+        LOG(LOG_WARNING, "server certificate:\n%s", server_cert);
         return -2;
     }
 
     return 0;
 }
 
-int server_certificate_path(FILE **file, const char *hostname, char *path, size_t size) {
+int server_certificate_path(FILE **file, const char *hostname,
+                            char *path, size_t size) {
     /* Hostname too long. */
     if (size - strlen(STORED_SERVER_CERT_FORMAT) <= strlen(hostname)) {
         LOG(LOG_WARNING,