html_viewer: Move webcrypto to a place where html_viewer can use it.

content/child/webcrypto/nss/util_nss.h

-// Copyright 2014 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 CONTENT_CHILD_WEBCRYPTO_NSS_UTIL_NSS_H_
-#define CONTENT_CHILD_WEBCRYPTO_NSS_UTIL_NSS_H_
-
-#include <keythi.h>
-#include <pkcs11t.h>
-#include <seccomon.h>
-#include <secmodt.h>
-
-#include "base/lazy_instance.h"
-
-namespace content {
-
-namespace webcrypto {
-
-class CryptoData;
-
-SECItem MakeSECItemForBuffer(const CryptoData& buffer);
-enum EncryptOrDecrypt { ENCRYPT, DECRYPT };
-
-CryptoData SECItemToCryptoData(const SECItem& item);
-
-const CK_FLAGS kAllOperationFlags =
-    CKF_ENCRYPT | CKF_DECRYPT | CKF_SIGN | CKF_VERIFY | CKF_WRAP | CKF_UNWRAP;
-
-// Signature for PK11_Encrypt and PK11_Decrypt.
-typedef SECStatus (*PK11_EncryptDecryptFunction)(PK11SymKey*,
-                                                 CK_MECHANISM_TYPE,
-                                                 SECItem*,
-                                                 unsigned char*,
-                                                 unsigned int*,
-                                                 unsigned int,
-                                                 const unsigned char*,
-                                                 unsigned int);
-
-// Signature for PK11_PubEncrypt
-typedef SECStatus (*PK11_PubEncryptFunction)(SECKEYPublicKey*,
-                                             CK_MECHANISM_TYPE,
-                                             SECItem*,
-                                             unsigned char*,
-                                             unsigned int*,
-                                             unsigned int,
-                                             const unsigned char*,
-                                             unsigned int,
-                                             void*);
-
-// Signature for PK11_PrivDecrypt
-typedef SECStatus (*PK11_PrivDecryptFunction)(SECKEYPrivateKey*,
-                                              CK_MECHANISM_TYPE,
-                                              SECItem*,
-                                              unsigned char*,
-                                              unsigned int*,
-                                              unsigned int,
-                                              const unsigned char*,
-                                              unsigned int);
-
-// Singleton that detects whether or not AES-GCM and
-// RSA-OAEP are supported by the version of NSS being used.
-// On non-Linux platforms, Chromium embedders ship with a
-// fixed version of NSS, and these are always available.
-// However, on Linux (and ChromeOS), NSS is provided by the
-// system, and thus not all algorithms may be available
-// or be safe to use.
-class NssRuntimeSupport {
- public:
-  bool IsAesGcmSupported() const {
-    return pk11_encrypt_func_ && pk11_decrypt_func_;
-  }
-
-  bool IsRsaOaepSupported() const {
-    return pk11_pub_encrypt_func_ && pk11_priv_decrypt_func_ &&
-           internal_slot_does_oaep_;
-  }
-
-  // Returns NULL if unsupported.
-  PK11_EncryptDecryptFunction pk11_encrypt_func() const {
-    return pk11_encrypt_func_;
-  }
-
-  // Returns NULL if unsupported.
-  PK11_EncryptDecryptFunction pk11_decrypt_func() const {
-    return pk11_decrypt_func_;
-  }
-
-  // Returns NULL if unsupported.
-  PK11_PubEncryptFunction pk11_pub_encrypt_func() const {
-    return pk11_pub_encrypt_func_;
-  }
-
-  // Returns NULL if unsupported.
-  PK11_PrivDecryptFunction pk11_priv_decrypt_func() const {
-    return pk11_priv_decrypt_func_;
-  }
-
-  static NssRuntimeSupport* Get();
-
- private:
-  friend struct base::DefaultLazyInstanceTraits<NssRuntimeSupport>;
-
-  NssRuntimeSupport();
-
-  PK11_EncryptDecryptFunction pk11_encrypt_func_;
-  PK11_EncryptDecryptFunction pk11_decrypt_func_;
-  PK11_PubEncryptFunction pk11_pub_encrypt_func_;
-  PK11_PrivDecryptFunction pk11_priv_decrypt_func_;
-  bool internal_slot_does_oaep_;
-};
-
-}  // namespace webcrypto
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_WEBCRYPTO_NSS_UTIL_NSS_H_