aboutsummaryrefslogtreecommitdiffstats
path: root/src/cmd/rng.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/cmd/rng.cpp')
-rw-r--r--src/cmd/rng.cpp51
1 files changed, 51 insertions, 0 deletions
diff --git a/src/cmd/rng.cpp b/src/cmd/rng.cpp
new file mode 100644
index 000000000..e2a7a8270
--- /dev/null
+++ b/src/cmd/rng.cpp
@@ -0,0 +1,51 @@
+/*
+* (C) 2014 Jack Lloyd
+*
+* Distributed under the terms in doc/license.rst
+*/
+
+#include "apps.h"
+#include <botan/libstate.h>
+
+int rng_main(int argc, char* argv[])
+ {
+ if(argc == 1)
+ {
+ std::cout << "Usage: " << argv[0] << " [--raw-entropy] [n]\n";
+ return 1;
+ }
+
+ try
+ {
+ const size_t amt = to_u32bit(argv[argc-1]);
+ const bool raw = (argc == 3 && std::string(argv[1]) == "--raw-entropy");
+
+ if(!raw)
+ {
+ AutoSeeded_RNG rng;
+ std::cout << hex_encode(rng.random_vec(amt)) << "\n";
+ }
+ else
+ {
+ double total_collected = 0;
+
+ Entropy_Accumulator accum(
+ [amt,&total_collected](const byte in[], size_t in_len, double entropy_estimate)
+ {
+ std::cout << "Collected estimated "<< entropy_estimate << " bits in "
+ << hex_encode(in, in_len) << "\n";
+ total_collected += entropy_estimate;
+ return total_collected >= amt;
+ });
+
+ global_state().poll_available_sources(accum);
+ }
+ }
+ catch(std::exception& e)
+ {
+ std::cout << "Error: " << e.what() << "\n";
+ return 1;
+ }
+
+ return 0;
+ }