Botan 1.10.17

hmac.h
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1 /*
2 * HMAC
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7
8 #ifndef BOTAN_HMAC_H__
9 #define BOTAN_HMAC_H__
10
11 #include <botan/mac.h>
12 #include <botan/hash.h>
13
14 namespace Botan {
15
16 /**
17 * HMAC
18 */
19 class BOTAN_DLL HMAC : public MessageAuthenticationCode
20 {
21 public:
22 void clear();
23 std::string name() const;
24 MessageAuthenticationCode* clone() const;
25
26 size_t output_length() const { return hash->output_length(); }
27
28 Key_Length_Specification key_spec() const
29 {
30 // Absurd max length here is to support PBKDF2
31 return Key_Length_Specification(0, 512);
32 }
33
34 /**
35 * @param hash the hash to use for HMACing
36 */
37 HMAC(HashFunction* hash);
38 ~HMAC() { delete hash; }
39 private:
40 void add_data(const byte[], size_t);
41 void final_result(byte[]);
42 void key_schedule(const byte[], size_t);
43
44 HashFunction* hash;
45 SecureVector<byte> i_key, o_key;
46 };
47
48 }
49
50 #endif
Botan::HMAC::key_spec
Key_Length_Specification key_spec() const
Definition: hmac.h:28
Botan::Key_Length_Specification
Definition: key_spec.h:18
Botan::HMAC::output_length
size_t output_length() const
Definition: hmac.h:26
Botan::MessageAuthenticationCode
Definition: mac.h:20
Botan::byte
unsigned char byte
Definition: types.h:22
Botan::HMAC::~HMAC
~HMAC()
Definition: hmac.h:38
Botan
Definition: algo_base.h:14
Botan::HashFunction
Definition: hash.h:20
Botan::SecureVector< byte >
Botan::HMAC
Definition: hmac.h:19