Avoid using std::rand in test code

It makes static analyzers mad

1 files changed, 4 insertions, 2 deletions

diff --git a/src/tests/main.cpp b/src/tests/main.cpp
index d3c3a0916..51fa11374 100644
--- a/src/tests/main.cpp
+++ b/src/tests/main.cpp
@@ -11,7 +11,6 @@
 #include <string>
 #include <set>
 #include <deque>
-#include <cstdlib>
 
 #include <botan/version.h>
 #include <botan/loadstor.h>
@@ -122,9 +121,12 @@ class Test_Runner final : public Botan_CLI::Command
                      {
                      for(size_t i = 0; i != len; ++i)
                         {
-                        out[i] = std::rand();
+                        m_x = (m_x * 31337 + 42);
+                        out[i] = static_cast<uint8_t>(m_x >> 7);
                         }
                      }
+               private:
+                  uint32_t m_x = 1;
                };
 
             output() << " rng:bogus\n";