diff --git a/Crypto/Hash/Makefile b/Crypto/Hash/Makefile
new file mode 100644
index 0000000..9531acd
--- /dev/null
+++ b/Crypto/Hash/Makefile
@@ -0,0 +1,10 @@
+
+pass: unittest
+	@if ./unittest > pass ; then echo "PASS" ; else echo "FAIL" ; rm pass ; fi
+
+unittest: main.cpp SHA256.cpp
+	g++ main.cpp SHA256.cpp -o unittest
+
+clean:
+	rm pass unittest
+

diff --git a/Crypto/Hash/Makefile b/Crypto/Hash/Makefile
new file mode 100644
index 0000000..9531acd
--- /dev/null
+++ b/Crypto/Hash/Makefile
@@ -0,0 +1,10 @@
+
+pass: unittest
+	@if ./unittest > pass ; then echo "PASS" ; else echo "FAIL" ; rm pass ; fi
+
+unittest: main.cpp SHA256.cpp
+	g++ main.cpp SHA256.cpp -o unittest
+
+clean:
+	rm pass unittest
+
diff --git a/Crypto/Hash/main.cpp b/Crypto/Hash/main.cpp
new file mode 100644
index 0000000..bca8e1a
--- /dev/null
+++ b/Crypto/Hash/main.cpp
@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include "SHA256.h"
+
+
+void sha256_test(const char* test, const char* msg, const char* cmp)
+{
+	uint32_t hash[8];
+	sha256((uint8_t*)msg, strlen(msg), hash);
+	char buffer[1024];
+	snprintf(buffer, 1024, "0x%08x%08x%08x%08x%08x%08x%08x%08x", hash[0],
+		hash[1], hash[2], hash[3], hash[4], hash[5], hash[6], hash[7]);
+
+	if ( !strcmp(buffer, cmp) ) {
+		printf("%s: PASS\n", test);
+	} else {
+		printf("%s: FAIL\n", test);
+		printf("Hash:    %s\n", buffer);
+		printf("Compare: %s\n", cmp);
+		exit(-1);
+	}
+}
+
+
+int main()
+{
+	const char* test_str1 = "";
+	const char* test_str2 = "The quick brown fox jumps over the lazy dog.";
+	const char* test_str3 = "The quick brown fox jumps over the lazy dog";
+	sha256_test("SHA256 Test 1", test_str1, "0xe3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");
+	sha256_test("SHA256 Test 2", test_str2, "0xef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c");
+	sha256_test("SHA256 Test 3", test_str3, "0xd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592");
+    return 0;
+}
+