1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/crypto_tests.cpp b/src/test/crypto_tests.cpp
index 518cb849bb..d701f3bc4e 100644
--- a/src/test/crypto_tests.cpp
+++ b/src/test/crypto_tests.cpp
@@ -546,4 +546,20 @@ BOOST_AUTO_TEST_CASE(countbits_tests)
     }
 }
 
+BOOST_AUTO_TEST_CASE(sha256d64)
+{
+    for (int i = 0; i <= 32; ++i) {
+        unsigned char in[64 * 32];
+        unsigned char out1[32 * 32], out2[32 * 32];
+        for (int j = 0; j < 64 * i; ++j) {
+            in[j] = InsecureRandBits(8);
+        }
+        for (int j = 0; j < i; ++j) {
+            CHash256().Write(in + 64 * j, 64).Finalize(out1 + 32 * j);
+        }
+        SHA256D64(out2, in, i);
+        BOOST_CHECK(memcmp(out1, out2, 32 * i) == 0);
+    }
+}
+
 BOOST_AUTO_TEST_SUITE_END()