validate canons without yatest_common

1 files changed, 18 insertions, 0 deletions

diff --git a/library/cpp/tvmauth/utils.cpp b/library/cpp/tvmauth/utils.cpp
new file mode 100644
index 00000000000..a06cd6f5ba7
--- /dev/null
+++ b/library/cpp/tvmauth/utils.cpp
@@ -0,0 +1,18 @@
+#include "utils.h"
+
+namespace NTvmAuth::NUtils {
+    TStringBuf RemoveTicketSignature(TStringBuf ticketBody) {
+        if (ticketBody.size() < 2 ||
+            ticketBody[0] != '3' ||
+            ticketBody[1] != ':') {
+            return ticketBody;
+        }
+
+        size_t pos = ticketBody.rfind(':');
+        if (pos == TStringBuf::npos) { // impossible
+            return ticketBody;
+        }
+
+        return ticketBody.substr(0, pos + 1);
+    }
+}