1 files changed, 50 insertions, 0 deletions
diff --git a/tests.c b/tests.c
new file mode 100644
index 0000000..a71bd7b
--- /dev/null
+++ b/tests.c
@@ -0,0 +1,50 @@
+#include <string.h> // memcmp()
+#include "sha256.h"
+
+static const struct {
+  const char * const s;
+  const uint8_t h[32];
+} TESTS[] = {{
+  .s = "",
+  .h = {
+    0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
+    0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
+    0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
+    0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55, 
+  },
+}, {
+  .s = "abc",
+  .h = { 
+    0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea,
+    0x41, 0x41, 0x40, 0xde, 0x5d, 0xae, 0x22, 0x23,
+    0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c,
+    0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad, 
+  },
+}, {
+  .s = "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+  .h = {
+    0x24, 0x8d, 0x6a, 0x61, 0xd2, 0x06, 0x38, 0xb8,
+    0xe5, 0xc0, 0x26, 0x93, 0x0c, 0x3e, 0x60, 0x39,
+    0xa3, 0x3c, 0xe4, 0x59, 0x64, 0xff, 0x21, 0x67,
+    0xf6, 0xec, 0xed, 0xd4, 0x19, 0xdb, 0x06, 0xc1, 
+  },
+}};
+
+#define NUM_TESTS (sizeof(TESTS) / sizeof(TESTS[0]))
+
+unsigned int run_tests(
+  void (*on_fail)(const char * const, const uint8_t *, const uint8_t *)
+) {
+  uint8_t hash[SHA256_HASH_SIZE];
+  unsigned int r = 0;
+
+  for (size_t i = 0; i < NUM_TESTS; i++) {
+    sha256((const uint8_t *) TESTS[i].s, strlen(TESTS[i].s), hash);
+    if (memcmp(hash, TESTS[i].h, sizeof(hash))) {
+      on_fail(TESTS[i].s, hash, TESTS[i].h);
+      r++;
+    }
+  }
+
+  return r;
+}