Generalize crypto::SignatureCreator to allow choice of hash function, so as to support SHA256 (not …

crypto/signature_creator_unittest.cc

Index: crypto/signature_creator_unittest.cc
diff --git a/crypto/signature_creator_unittest.cc b/crypto/signature_creator_unittest.cc
index f0a888816e6b307cc9a25e668eb579916cce194c..8b83c21b0011b323e2cf38218f175afaa837c2a0 100644
--- a/crypto/signature_creator_unittest.cc
+++ b/crypto/signature_creator_unittest.cc
@@ -7,6 +7,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/sha1.h"
 #include "crypto/rsa_private_key.h"
+#include "crypto/sha2.h"
 #include "crypto/signature_creator.h"
 #include "crypto/signature_verifier.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -19,6 +20,12 @@ const uint8 kSHA1WithRSAAlgorithmID[] = {
   0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00
 };
 
+// This is the algorithm ID for SHA-1 with RSA encryption.

[davidben, 2014/09/10 22:03:54]

Nit: s/SHA-1/SHA-256/

+const uint8 kSHA256WithRSAAlgorithmID[] = {
+  0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
+  0xf7, 0x0d, 0x01, 0x01, 0x0B, 0x05, 0x00
+};
+
 }
 
 TEST(SignatureCreatorTest, BasicTest) {
@@ -94,3 +101,41 @@ TEST(SignatureCreatorTest, SignDigestTest) {
                         data.size());
   ASSERT_TRUE(verifier.VerifyFinal());
 }
+
+TEST(SignatureCreatorTest, SignSHA256DigestTest) {
+  // Do a verify round trip.
+  scoped_ptr<crypto::RSAPrivateKey> key_original(
+      crypto::RSAPrivateKey::Create(1024));
+  ASSERT_TRUE(key_original.get());
+
+  std::vector<uint8> key_info;
+  key_original->ExportPrivateKey(&key_info);
+  scoped_ptr<crypto::RSAPrivateKey> key(
+      crypto::RSAPrivateKey::CreateFromPrivateKeyInfo(key_info));
+  ASSERT_TRUE(key.get());
+
+  std::string data("Hello, World!");
+  std::string sha256 = crypto::SHA256HashString(data);
+  // Sign sha256 of the input data.
+  std::vector<uint8> signature;
+  ASSERT_TRUE(crypto::SignatureCreator::SignUsingSpecifiedHash(
+      key.get(),
+      crypto::SignatureCreator::HashAlgorithm::SHA256,
+      reinterpret_cast<const uint8*>(sha256.c_str()),
+      sha256.size(),
+      &signature));
+
+  std::vector<uint8> public_key_info;
+  ASSERT_TRUE(key_original->ExportPublicKey(&public_key_info));
+
+  // Verify the input data.
+  crypto::SignatureVerifier verifier;
+  ASSERT_TRUE(verifier.VerifyInit(
+      kSHA256WithRSAAlgorithmID, sizeof(kSHA256WithRSAAlgorithmID),
+      &signature.front(), signature.size(),
+      &public_key_info.front(), public_key_info.size()));
+
+  verifier.VerifyUpdate(reinterpret_cast<const uint8*>(data.c_str()),
+                        data.size());
+  ASSERT_TRUE(verifier.VerifyFinal());
+}