NSS Channel ID: don't check ECC support on every socket creation.

crypto/ec_private_key.h

 // 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.
 
 #ifndef CRYPTO_EC_PRIVATE_KEY_H_
 #define CRYPTO_EC_PRIVATE_KEY_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
 #include "crypto/crypto_export.h"
 
 #if defined(USE_OPENSSL)
 // Forward declaration for openssl/*.h
 typedef struct evp_pkey_st EVP_PKEY;
 #else
 // Forward declaration.
 typedef struct CERTSubjectPublicKeyInfoStr CERTSubjectPublicKeyInfo;
 typedef struct SECKEYPrivateKeyStr SECKEYPrivateKey;
 typedef struct SECKEYPublicKeyStr SECKEYPublicKey;
+typedef struct PK11SlotInfoStr PK11SlotInfo;
 #endif
 
 namespace crypto {
 
 // Encapsulates an elliptic curve (EC) private key. Can be used to generate new
 // keys, export keys to other formats, or to extract a public key.
 // TODO(mattm): make this and RSAPrivateKey implement some PrivateKey interface.
 // (The difference in types of key() and public_key() make this a little
 // tricky.)
 class CRYPTO_EXPORT ECPrivateKey {
@@ skipping 39 matching lines @@
   // TODO(mattm): move this function to some NSS util file.
   static bool ImportFromEncryptedPrivateKeyInfo(
       const std::string& password,
       const uint8* encrypted_private_key_info,
       size_t encrypted_private_key_info_len,
       CERTSubjectPublicKeyInfo* decoded_spki,
       bool permanent,
       bool sensitive,
       SECKEYPrivateKey** key,
       SECKEYPublicKey** public_key);
+
+  // Returns a reference to the NSS slot that will be used to generate / store
+  // the private key.
+  static PK11SlotInfo* GetKeySlot();
 #endif
 
 #if defined(USE_OPENSSL)
   EVP_PKEY* key() { return key_; }
 #else
   SECKEYPrivateKey* key() { return key_; }
   SECKEYPublicKey* public_key() { return public_key_; }
 #endif
 
   // Exports the private key as an ASN.1-encoded PKCS #8 EncryptedPrivateKeyInfo
@@ skipping 39 matching lines @@
   SECKEYPublicKey* public_key_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ECPrivateKey);
 };
 
 
 }  // namespace crypto
 
 #endif  // CRYPTO_EC_PRIVATE_KEY_H_