Abstracts SHA256 context for NSS / OpenSSL.

base/secure_hash_unittest.cc

+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/secure_hash.h"
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(SecureHashTest, TestUpdate) {
+  // Example B.3 from FIPS 180-2: long message.
+  std::string input3(500000, 'a');  // 'a' repeated half a million times
+  int expected3[] = { 0xcd, 0xc7, 0x6e, 0x5c,
+                      0x99, 0x14, 0xfb, 0x92,
+                      0x81, 0xa1, 0xc7, 0xe2,
+                      0x84, 0xd7, 0x3e, 0x67,
+                      0xf1, 0x80, 0x9a, 0x48,
+                      0xa4, 0x97, 0x20, 0x0e,
+                      0x04, 0x6d, 0x39, 0xcc,
+                      0xc7, 0x11, 0x2c, 0xd0 };
+
+  uint8 output3[base::SHA256_LENGTH];
+
+  scoped_ptr<base::SecureHash> ctx(base::SecureHash::Create(
+      base::SecureHash::TYPE_SHA256));
+  ctx->Update(input3);
+  ctx->Update(input3);
+
+  ctx->Finish(output3, sizeof(output3));
+  for (size_t i = 0; i < base::SHA256_LENGTH; i++)
+    EXPECT_EQ(expected3[i], static_cast<int>(output3[i]));
+}