1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CRYPTO_SIGNATURE_CREATOR_H_ 6 #define CRYPTO_SIGNATURE_CREATOR_H_ 7 #pragma once 8 9 #include "build/build_config.h" 10 11 #if defined(USE_OPENSSL) 12 // Forward declaration for openssl/*.h 13 typedef struct env_md_ctx_st EVP_MD_CTX; 14 #elif defined(USE_NSS) 15 // Forward declaration. 16 struct SGNContextStr; 17 #elif defined(OS_MACOSX) 18 #include <Security/cssm.h> 19 #endif 20 21 #include <vector> 22 23 #include "base/basictypes.h" 24 #include "crypto/rsa_private_key.h" 25 26 #if defined(OS_WIN) 27 #include "crypto/scoped_capi_types.h" 28 #endif 29 30 namespace crypto { 31 32 // Signs data using a bare private key (as opposed to a full certificate). 33 // Currently can only sign data using SHA-1 with RSA encryption. 34 class SignatureCreator { 35 public: 36 ~SignatureCreator(); 37 38 // Create an instance. The caller must ensure that the provided PrivateKey 39 // instance outlives the created SignatureCreator. 40 static SignatureCreator* Create(RSAPrivateKey* key); 41 42 // Update the signature with more data. 43 bool Update(const uint8* data_part, int data_part_len); 44 45 // Finalize the signature. 46 bool Final(std::vector<uint8>* signature); 47 48 private: 49 // Private constructor. Use the Create() method instead. 50 SignatureCreator(); 51 52 RSAPrivateKey* key_; 53 54 #if defined(USE_OPENSSL) 55 EVP_MD_CTX* sign_context_; 56 #elif defined(USE_NSS) 57 SGNContextStr* sign_context_; 58 #elif defined(OS_MACOSX) 59 CSSM_CC_HANDLE sig_handle_; 60 #elif defined(OS_WIN) 61 ScopedHCRYPTHASH hash_object_; 62 #endif 63 64 DISALLOW_COPY_AND_ASSIGN(SignatureCreator); 65 }; 66 67 } // namespace crypto 68 69 #endif // CRYPTO_SIGNATURE_CREATOR_H_ 70
