Botan 2.19.5 Crypto and TLS for C&

salsa20.h
Go to the documentation of this file.
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
13 BOTAN_FUTURE_INTERNAL_HEADER(salsa20.h)
14
15namespace Botan {
16
17/**
18* DJB's Salsa20 (and XSalsa20)
19*/
20 class BOTAN_PUBLIC_API(2,0) Salsa20 final : public StreamCipher
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
46 secure_vector<uint32_t> m_key;
47 secure_vector<uint32_t> m_state;
48 secure_vector<uint8_t> m_buffer;
49 size_t m_position = 0;
50 };
51
52}
53
54#endif
Botan::Key_Length_Specification
Definition: sym_algo.h:20
Botan::Salsa20
Definition: salsa20.h:21
Botan::StreamCipher
Definition: stream_cipher.h:22
Botan::StreamCipher::cipher
virtual void cipher(const uint8_t in[], uint8_t out[], size_t len)=0
Botan::StreamCipher::default_iv_length
virtual size_t default_iv_length() const
Definition: stream_cipher.h:119
Botan::StreamCipher::clone
virtual StreamCipher * clone() const =0
Botan::StreamCipher::set_iv
virtual void set_iv(const uint8_t iv[], size_t iv_len)=0
Botan::StreamCipher::seek
virtual void seek(uint64_t offset)=0
Botan::StreamCipher::valid_iv_length
virtual bool valid_iv_length(size_t iv_len) const
Definition: stream_cipher.h:125
Botan::SymmetricAlgorithm::name
virtual std::string name() const =0
Botan::SymmetricAlgorithm::clear
virtual void clear()=0
Botan::SymmetricAlgorithm::key_spec
virtual Key_Length_Specification key_spec() const =0
final
int(* final)(unsigned char *, CTX *)
Definition: commoncrypto_hash.cpp:29
BOTAN_PUBLIC_API
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:31
BOTAN_FUTURE_INTERNAL_HEADER
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition: compiler.h:136
Botan
Definition: alg_id.cpp:13
Botan::secure_vector
std::vector< T, secure_allocator< T > > secure_vector
Definition: secmem.h:65