base64: Assert that input is multiple of 4

75039c57 · Tatsuhiro Tsujikawa · 4b5179a5 · 75039c57
Commit 75039c57 authored Oct 03, 2016 by Tatsuhiro Tsujikawa
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src/base64.h src/base64.h +1 -1

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--- a/src/base64.h
+++ b/src/base64.h
@@ -108,7 +108,7 @@ OutputIt decode(InputIt first, InputIt last, OutputIt d_first) {
      -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
      -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
      -1, -1, -1, -1};
-
+  assert(std::distance(first, last) % 4 == 0);
  auto p = d_first;
  for (; first != last;) {
    uint32_t n = 0;