Botan  2.12.1
Crypto and TLS for C++11
salsa20.h
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1 /*
2 * Salsa20 / XSalsa20
3 * (C) 1999-2010 Jack Lloyd
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #ifndef BOTAN_SALSA20_H_
9 #define BOTAN_SALSA20_H_
10 
11 #include <botan/stream_cipher.h>
12 
14 
15 namespace Botan {
16 
17 /**
18 * DJB's Salsa20 (and XSalsa20)
19 */
21  {
22  public:
23  void cipher(const uint8_t in[], uint8_t out[], size_t length) override;
24 
25  void set_iv(const uint8_t iv[], size_t iv_len) override;
26 
27  bool valid_iv_length(size_t iv_len) const override;
28 
29  size_t default_iv_length() const override;
30 
31  Key_Length_Specification key_spec() const override;
32 
33  void clear() override;
34  std::string name() const override;
35  StreamCipher* clone() const override;
36 
37  static void salsa_core(uint8_t output[64], const uint32_t input[16], size_t rounds);
38  static void hsalsa20(uint32_t output[8], const uint32_t input[16]);
39 
40  void seek(uint64_t offset) override;
41  private:
42  void key_schedule(const uint8_t key[], size_t key_len) override;
43 
44  void initialize_state();
45 
48  secure_vector<uint8_t> m_buffer;
49  size_t m_position = 0;
50  };
51 
52 }
53 
54 #endif
virtual size_t default_iv_length() const
int(* final)(unsigned char *, CTX *)
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:31
virtual void cipher(const uint8_t in[], uint8_t out[], size_t len)=0
virtual bool valid_iv_length(size_t iv_len) const
virtual std::string name() const =0
virtual void clear()=0
virtual void seek(uint64_t offset)=0
Definition: alg_id.cpp:13
virtual Key_Length_Specification key_spec() const =0
virtual StreamCipher * clone() const =0
std::vector< T, secure_allocator< T > > secure_vector
Definition: secmem.h:65
virtual void set_iv(const uint8_t iv[], size_t iv_len)=0
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition: compiler.h:139