Add a variant of RandomNumberGenerator::random_vec

This avoids the unlock(rng.random_vec(...)) pattern which is
pretty wasteful in terms of heap overhead.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/tests/test_rng.h b/src/tests/test_rng.h
index 01fe89c92..080603a23 100644
--- a/src/tests/test_rng.h
+++ b/src/tests/test_rng.h
@@ -69,6 +69,13 @@ class Fixed_Output_RNG : public Botan::RandomNumberGenerator
          m_buf.insert(m_buf.end(), in.begin(), in.end());
          }
 
+      Fixed_Output_RNG(RandomNumberGenerator& rng, size_t len)
+         {
+         std::vector<uint8_t> output;
+         rng.random_vec(output, len);
+         m_buf.insert(m_buf.end(), output.begin(), output.end());
+         }
+
       Fixed_Output_RNG() = default;
    protected:
       uint8_t random()