Botan  2.12.1
Crypto and TLS for C++11
shake_cipher.h
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1 /*
2 * SHAKE-128 as a stream cipher
3 * (C) 2016 Jack Lloyd
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #ifndef BOTAN_SHAKE128_CIPHER_H_
9 #define BOTAN_SHAKE128_CIPHER_H_
10 
11 #include <botan/stream_cipher.h>
12 #include <botan/secmem.h>
13 
14 BOTAN_FUTURE_INTERNAL_HEADER(shake_cipher.h)
15 
16 namespace Botan {
17 
18 /**
19 * SHAKE-128 XOF presented as a stream cipher
20 */
22  {
23  public:
25 
26  /**
27  * Produce more XOF output
28  */
29  void cipher(const uint8_t in[], uint8_t out[], size_t length) override;
30 
31  /**
32  * Seeking is not supported, this function will throw
33  */
34  void seek(uint64_t offset) override;
35 
36  /**
37  * IV not supported, this function will throw unless iv_len == 0
38  */
39  void set_iv(const uint8_t iv[], size_t iv_len) override;
40 
41  Key_Length_Specification key_spec() const override;
42 
43  void clear() override;
44  std::string name() const override;
45  StreamCipher* clone() const override;
46 
47  private:
48  void key_schedule(const uint8_t key[], size_t key_len) override;
49 
50  secure_vector<uint64_t> m_state; // internal state
51  secure_vector<uint8_t> m_buffer; // ciphertext buffer
52  size_t m_buf_pos; // position in m_buffer
53  };
54 
55 }
56 
57 #endif
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 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