Added serialization to SecureHash.

crypto/secure_hash_unittest.cc

Index: crypto/secure_hash_unittest.cc
diff --git a/crypto/secure_hash_unittest.cc b/crypto/secure_hash_unittest.cc
index 6ac92852162945bf7653a8d070ef96bf62f09e85..2adddfb98ebcabaf52c927b5b9654279e6801ae7 100644
--- a/crypto/secure_hash_unittest.cc
+++ b/crypto/secure_hash_unittest.cc
@@ -6,6 +6,7 @@
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/pickle.h"
 #include "crypto/sha2.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -32,3 +33,41 @@ TEST(SecureHashTest, TestUpdate) {
   for (size_t i = 0; i < crypto::kSHA256Length; i++)
     EXPECT_EQ(expected3[i], static_cast<int>(output3[i]));
 }
+
+// Save the crypto state mid-stream, and create another instance with the
+// saved state.  Then feed the same data afterwards to both.
+// When done, both should have the same hash value.
+TEST(SecureHashTest, TestSerialization) {
+  std::string input1(10001, 'a');  // 'a' repeated 10001 times
+  std::string input2(10001, 'b');  // 'b' repeated 10001 times
+  std::string input3(10001, 'c');  // 'c' repeated 10001 times
+  std::string input4(10001, 'd');  // 'd' repeated 10001 times
+  std::string input5(10001, 'e');  // 'e' repeated 10001 times
+
+  uint8 output1[crypto::kSHA256Length];
+  uint8 output2[crypto::kSHA256Length];
+
+  scoped_ptr<crypto::SecureHash> ctx1(crypto::SecureHash::Create(
+      crypto::SecureHash::SHA256));
+  scoped_ptr<crypto::SecureHash> ctx2(crypto::SecureHash::Create(
+      crypto::SecureHash::SHA256));
+  Pickle pickle;
+  ctx1->Update(input1.data(), input1.size());
+  ctx1->Update(input2.data(), input2.size());
+  ctx1->Update(input3.data(), input3.size());
+
+  EXPECT_TRUE(ctx1->Serialize(&pickle));
+  ctx1->Update(input4.data(), input4.size());
+  ctx1->Update(input5.data(), input5.size());
+
+  ctx1->Finish(output1, sizeof(output1));
+
+  void* data_iterator = NULL;
+  EXPECT_TRUE(ctx2->Deserialize(&data_iterator, &pickle));
+  ctx2->Update(input4.data(), input4.size());
+  ctx2->Update(input5.data(), input5.size());
+
+  ctx2->Finish(output2, sizeof(output2));
+
+  EXPECT_EQ(0, memcmp(output1, output2, crypto::kSHA256Length));
+}