1 files changed, 54 insertions, 0 deletions
diff --git a/crypto/signature_creator_openssl.cc b/crypto/signature_creator_openssl.cc
new file mode 100644
index 0000000..e6aa422
--- /dev/null
+++ b/crypto/signature_creator_openssl.cc
@@ -0,0 +1,54 @@
+// 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 <openssl/evp.h>
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/stl_util-inl.h"
+#include "crypto/openssl_util.h"
+
+namespace crypto {
+
+// static
+SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key) {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+  scoped_ptr<SignatureCreator> result(new SignatureCreator);
+  result->key_ = key;
+  if (!EVP_SignInit_ex(result->sign_context_, EVP_sha1(), NULL))
+    return NULL;
+  return result.release();
+}
+
+SignatureCreator::SignatureCreator()
+    : sign_context_(EVP_MD_CTX_create()) {
+}
+
+SignatureCreator::~SignatureCreator() {
+  EVP_MD_CTX_destroy(sign_context_);
+}
+
+bool SignatureCreator::Update(const uint8* data_part, int data_part_len) {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+  return EVP_SignUpdate(sign_context_, data_part, data_part_len) == 1;
+}
+
+bool SignatureCreator::Final(std::vector<uint8>* signature) {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+  EVP_PKEY* key = key_->key();
+  signature->resize(EVP_PKEY_size(key));
+
+  unsigned int len = 0;
+  int rv = EVP_SignFinal(sign_context_, vector_as_array(signature), &len, key);
+  if (!rv) {
+    signature->clear();
+    return false;
+  }
+  signature->resize(len);
+  return true;
+}
+
+}  // namespace crypto