1 files changed, 76 insertions, 0 deletions
diff --git a/crypto/signature_creator_nss.cc b/crypto/signature_creator_nss.cc
new file mode 100644
index 0000000..2614944
--- /dev/null
+++ b/crypto/signature_creator_nss.cc
@@ -0,0 +1,76 @@
+// Copyright (c) 2011 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 "crypto/signature_creator.h"
+
+#include <cryptohi.h>
+#include <keyhi.h>
+#include <stdlib.h>
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "crypto/nss_util.h"
+
+namespace crypto {
+
+SignatureCreator::~SignatureCreator() {
+  if (sign_context_) {
+    SGN_DestroyContext(sign_context_, PR_TRUE);
+    sign_context_ = NULL;
+  }
+}
+
+// static
+SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) {
+  scoped_ptr<SignatureCreator> result(new SignatureCreator);
+  result->key_ = key;
+
+  result->sign_context_ = SGN_NewContext(SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION,
+      key->key());
+  if (!result->sign_context_) {
+    NOTREACHED();
+    return NULL;
+  }
+
+  SECStatus rv = SGN_Begin(result->sign_context_);
+  if (rv != SECSuccess) {
+    NOTREACHED();
+    return NULL;
+  }
+
+  return result.release();
+}
+
+bool SignatureCreator::Update(const uint8* data_part, int data_part_len) {
+  // TODO(wtc): Remove this const_cast when we require NSS 3.12.5.
+  // See NSS bug https://bugzilla.mozilla.org/show_bug.cgi?id=518255
+  SECStatus rv = SGN_Update(sign_context_,
+                            const_cast<unsigned char*>(data_part),
+                            data_part_len);
+  if (rv != SECSuccess) {
+    NOTREACHED();
+    return false;
+  }
+
+  return true;
+}
+
+bool SignatureCreator::Final(std::vector<uint8>* signature) {
+  SECItem signature_item;
+  SECStatus rv = SGN_End(sign_context_, &signature_item);
+  if (rv != SECSuccess) {
+    NOTREACHED();
+    return false;
+  }
+  signature->assign(signature_item.data,
+                    signature_item.data + signature_item.len);
+  SECITEM_FreeItem(&signature_item, PR_FALSE);
+  return true;
+}
+
+SignatureCreator::SignatureCreator() : sign_context_(NULL) {
+  EnsureNSSInit();
+}
+
+}  // namespace crypto