Introduce SignatureCreator.

base/crypto/signature_creator_unittest.cc

+// Copyright (c) 2009 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 <vector>
+
+#include "base/crypto/signature_creator.h"
+#include "base/crypto/signature_verifier.h"
+#include "base/scoped_ptr.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(SignatureCreatorTest, BasicTest) {
+  // Do a verify round trip.
+  scoped_ptr<base::RSAPrivateKey> key(base::RSAPrivateKey::Create(1024));
+  ASSERT_TRUE(key.get());
+
+  scoped_ptr<base::SignatureCreator> signer(
+      base::SignatureCreator::Create(key.get()));
+  ASSERT_TRUE(signer.get());
+
+  std::string data("Hello, world!");
+  ASSERT_TRUE(signer->Update(reinterpret_cast<const uint8*>(data.c_str()),
+                             data.size()));
+
+  std::vector<uint8> signature;
+  ASSERT_TRUE(signer->Final(&signature));
+
+  std::vector<uint8> public_key_info;
+  ASSERT_TRUE(key->ExportPublicKey(&public_key_info));
+
+  // This is the algorithm ID for SHA-1 with RSA encryption.
+  // TODO(aa): Factor this out into some shared location.
+  const uint8 kSHA1WithRSAAlgorithmID[] = {
+    0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
+    0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00
+  };
+  base::SignatureVerifier verifier;
+  ASSERT_TRUE(verifier.VerifyInit(
+      kSHA1WithRSAAlgorithmID, sizeof(kSHA1WithRSAAlgorithmID),
+      &signature.front(), signature.size(),
+      &public_key_info.front(), public_key_info.size()));
+}
+
+// TODO(aa): Would be nice to test some well-known signatures.