Reland "Cut down /crypto and switch what is left of it to boringssl".

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) || 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) || defined(OS_WIN) || defined(OS_MACOSX)
-  SGNContextStr* sign_context_;
-#endif
-
-  DISALLOW_COPY_AND_ASSIGN(SignatureCreator);
-};
-
-}  // namespace crypto
-
-#endif  // CRYPTO_SIGNATURE_CREATOR_H_