1 // Copyright (c) 2012 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 8 #include "build/build_config.h" 9 10 #include <vector> 11 12 #include "base/basictypes.h" 13 #include "crypto/crypto_export.h" 14 15 #if defined(USE_OPENSSL) 16 // Forward declaration for openssl/*.h 17 typedef struct env_md_ctx_st EVP_MD_CTX; 18 #elif defined(USE_NSS) || defined(OS_WIN) || defined(OS_MACOSX) 19 // Forward declaration. 20 struct SGNContextStr; 21 #endif 22 23 namespace crypto { 24 25 class RSAPrivateKey; 26 27 // Signs data using a bare private key (as opposed to a full certificate). 28 // Currently can only sign data using SHA-1 with RSA encryption. 29 class CRYPTO_EXPORT SignatureCreator { 30 public: 31 ~SignatureCreator(); 32 33 // Create an instance. The caller must ensure that the provided PrivateKey 34 // instance outlives the created SignatureCreator. 35 static SignatureCreator* Create(RSAPrivateKey* key); 36 37 // Signs the precomputed SHA-1 digest |data| using private |key| as 38 // specified in PKCS #1 v1.5. 39 static bool Sign(RSAPrivateKey* key, 40 const uint8* data, 41 int data_len, 42 std::vector<uint8>* signature); 43 44 // Update the signature with more data. 45 bool Update(const uint8* data_part, int data_part_len); 46 47 // Finalize the signature. 48 bool Final(std::vector<uint8>* signature); 49 50 private: 51 // Private constructor. Use the Create() method instead. 52 SignatureCreator(); 53 54 RSAPrivateKey* key_; 55 56 #if defined(USE_OPENSSL) 57 EVP_MD_CTX* sign_context_; 58 #elif defined(USE_NSS) || defined(OS_WIN) || defined(OS_MACOSX) 59 SGNContextStr* sign_context_; 60 #endif 61 62 DISALLOW_COPY_AND_ASSIGN(SignatureCreator); 63 }; 64 65 } // namespace crypto 66 67 #endif // CRYPTO_SIGNATURE_CREATOR_H_ 68
