Use base::StringPiece for input parameters in Encryptor, rather than std::string

R=wtc
BUG=none
TEST=crypto_unittests


Review URL: http://codereview.chromium.org/7230037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@91800 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 9 insertions, 5 deletions

diff --git a/crypto/encryptor_openssl.cc b/crypto/encryptor_openssl.cc
index 7b1e13f..6513181 100644
--- a/crypto/encryptor_openssl.cc
+++ b/crypto/encryptor_openssl.cc
@@ -52,7 +52,9 @@ Encryptor::Encryptor()
 Encryptor::~Encryptor() {
 }
 
-bool Encryptor::Init(SymmetricKey* key, Mode mode, const std::string& iv) {
+bool Encryptor::Init(SymmetricKey* key,
+                     Mode mode,
+                     const base::StringPiece& iv) {
   DCHECK(key);
   DCHECK_EQ(CBC, mode);
 
@@ -65,20 +67,22 @@ bool Encryptor::Init(SymmetricKey* key, Mode mode, const std::string& iv) {
 
   key_ = key;
   mode_ = mode;
-  iv_ = iv;
+  iv.CopyToString(&iv_);
   return true;
 }
 
-bool Encryptor::Encrypt(const std::string& plaintext, std::string* ciphertext) {
+bool Encryptor::Encrypt(const base::StringPiece& plaintext,
+                        std::string* ciphertext) {
   return Crypt(true, plaintext, ciphertext);
 }
 
-bool Encryptor::Decrypt(const std::string& ciphertext, std::string* plaintext) {
+bool Encryptor::Decrypt(const base::StringPiece& ciphertext,
+                        std::string* plaintext) {
   return Crypt(false, ciphertext, plaintext);
 }
 
 bool Encryptor::Crypt(bool do_encrypt,
-                      const std::string& input,
+                      const base::StringPiece& input,
                       std::string* output) {
   DCHECK(key_);  // Must call Init() before En/De-crypt.
   // Work on the result in a local variable, and then only transfer it to