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-rw-r--r--t/helper/test-csprng.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/t/helper/test-csprng.c b/t/helper/test-csprng.c
new file mode 100644
index 0000000000..65d14973c5
--- /dev/null
+++ b/t/helper/test-csprng.c
@@ -0,0 +1,29 @@
+#include "test-tool.h"
+#include "git-compat-util.h"
+
+
+int cmd__csprng(int argc, const char **argv)
+{
+ unsigned long count;
+ unsigned char buf[1024];
+
+ if (argc > 2) {
+ fprintf(stderr, "usage: %s [<size>]\n", argv[0]);
+ return 2;
+ }
+
+ count = (argc == 2) ? strtoul(argv[1], NULL, 0) : -1L;
+
+ while (count) {
+ unsigned long chunk = count < sizeof(buf) ? count : sizeof(buf);
+ if (csprng_bytes(buf, chunk) < 0) {
+ perror("failed to read");
+ return 5;
+ }
+ if (fwrite(buf, chunk, 1, stdout) != chunk)
+ return 1;
+ count -= chunk;
+ }
+
+ return 0;
+}