Update monet.

crypto/signature_creator.h

+// Copyright (c) 2012 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.
+
+#ifndef CRYPTO_SIGNATURE_CREATOR_H_
+#define CRYPTO_SIGNATURE_CREATOR_H_
+
+#include <vector>
+
+#include "build/build_config.h"
+#include "base/basictypes.h"
+#include "crypto/crypto_export.h"
+
+#if defined(USE_OPENSSL)
+// Forward declaration for openssl/*.h
+typedef struct env_md_ctx_st EVP_MD_CTX;
+#elif defined(USE_NSS_CERTS) || defined(OS_WIN) || defined(OS_MACOSX)
+// Forward declaration.
+struct SGNContextStr;
+#endif
+
+namespace crypto {
+
+class RSAPrivateKey;
+
+// Signs data using a bare private key (as opposed to a full certificate).
+// Currently can only sign data using SHA-1 or SHA-256 with RSA PKCS#1v1.5.
+class CRYPTO_EXPORT SignatureCreator {
+ public:
+  // The set of supported hash functions. Extend as required.
+  enum HashAlgorithm {
+    SHA1,
+    SHA256,
+  };
+
+  ~SignatureCreator();
+
+  // Create an instance. The caller must ensure that the provided PrivateKey
+  // instance outlives the created SignatureCreator. Uses the HashAlgorithm
+  // specified.
+  static SignatureCreator* Create(RSAPrivateKey* key, HashAlgorithm hash_alg);
+
+
+  // Signs the precomputed |hash_alg| digest |data| using private |key| as
+  // specified in PKCS #1 v1.5.
+  static bool Sign(RSAPrivateKey* key,
+                   HashAlgorithm hash_alg,
+                   const uint8* data,
+                   int data_len,
+                   std::vector<uint8>* signature);
+
+  // Update the signature with more data.
+  bool Update(const uint8* data_part, int data_part_len);
+
+  // Finalize the signature.
+  bool Final(std::vector<uint8>* signature);
+
+ private:
+  // Private constructor. Use the Create() method instead.
+  SignatureCreator();
+
+#if defined(USE_OPENSSL)
+  EVP_MD_CTX* sign_context_;
+#elif defined(USE_NSS_CERTS) || defined(OS_WIN) || defined(OS_MACOSX)
+  SGNContextStr* sign_context_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(SignatureCreator);
+};
+
+}  // namespace crypto
+
+#endif  // CRYPTO_SIGNATURE_CREATOR_H_