Botan 2.13.0 Crypto and TLS for C++11

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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
13 BOTAN_FUTURE_INTERNAL_HEADER(salsa20.h)
14
15 namespace 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: key_spec.h:18
final
int(* final)(unsigned char *, CTX *)
Definition: commoncrypto_hash.cpp:28
BOTAN_PUBLIC_API
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:31
Botan::StreamCipher::cipher
virtual void cipher(const uint8_t in[], uint8_t out[], size_t len)=0
Botan::secure_vector
std::vector< T, secure_allocator< T >> secure_vector
Definition: secmem.h:65
Botan::SymmetricAlgorithm::name
virtual std::string name() const =0
Botan::StreamCipher
Definition: stream_cipher.h:21
Botan::SymmetricAlgorithm::clear
virtual void clear()=0
Botan::StreamCipher::seek
virtual void seek(uint64_t offset)=0
Botan
Definition: alg_id.cpp:13
Botan::StreamCipher::valid_iv_length
virtual bool valid_iv_length(size_t iv_len) const
Definition: stream_cipher.h:125
Botan::Salsa20
Definition: salsa20.h:20
Botan::SymmetricAlgorithm::key_spec
virtual Key_Length_Specification key_spec() const =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
m_key
const TPM_PrivateKey & m_key
Definition: tpm.cpp:445
BOTAN_FUTURE_INTERNAL_HEADER
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition: compiler.h:139