Botan 2.19.3
Crypto and TLS for C&
rc4.h
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1/*
2* RC4
3* (C) 1999-2008 Jack Lloyd
4*
5* Botan is released under the Simplified BSD License (see license.txt)
6*/
7
8#ifndef BOTAN_RC4_H_
9#define BOTAN_RC4_H_
10
11#include <botan/stream_cipher.h>
12#include <botan/types.h>
13
15
16namespace Botan {
17
18/**
19* RC4 stream cipher
20*/
22 {
23 public:
24 void cipher(const uint8_t in[], uint8_t out[], size_t length) override;
25
26 void set_iv(const uint8_t iv[], size_t iv_len) override;
27
28 void clear() override;
29 std::string name() const override;
30
31 StreamCipher* clone() const override;
32
33 Key_Length_Specification key_spec() const override;
34
35 /**
36 * @param skip skip this many initial bytes in the keystream
37 */
38 explicit RC4(size_t skip = 0);
39
40 ~RC4() { clear(); }
41
42 void seek(uint64_t offset) override;
43 private:
44 void key_schedule(const uint8_t[], size_t) override;
45 void generate();
46
47 const size_t m_SKIP;
48 uint8_t m_X = 0;
49 uint8_t m_Y = 0;
52 size_t m_position = 0;
53 };
54
55}
56
57#endif
~RC4()
Definition rc4.h:40
virtual void cipher(const uint8_t in[], uint8_t out[], size_t len)=0
virtual StreamCipher * clone() const =0
virtual void set_iv(const uint8_t iv[], size_t iv_len)=0
virtual void seek(uint64_t offset)=0
virtual std::string name() const =0
virtual void clear()=0
virtual Key_Length_Specification key_spec() const =0
int(* final)(unsigned char *, CTX *)
#define BOTAN_PUBLIC_API(maj, min)
Definition compiler.h:31
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition compiler.h:136
std::vector< T, secure_allocator< T > > secure_vector
Definition secmem.h:65