Botan 2.19.5 Crypto and TLS for C&

ofb.h
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1/*
2* OFB Mode
3* (C) 1999-2007 Jack Lloyd
4*
5* Botan is released under the Simplified BSD License (see license.txt)
6*/
7
8#ifndef BOTAN_OUTPUT_FEEDBACK_MODE_H_
9#define BOTAN_OUTPUT_FEEDBACK_MODE_H_
10
11#include <botan/stream_cipher.h>
12#include <botan/block_cipher.h>
13
14 BOTAN_FUTURE_INTERNAL_HEADER(ofb.h)
15
16namespace Botan {
17
18/**
19* Output Feedback Mode
20*/
21 class BOTAN_PUBLIC_API(2,0) OFB final : public StreamCipher
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 size_t default_iv_length() const override;
29
30 bool valid_iv_length(size_t iv_len) const override;
31
32 Key_Length_Specification key_spec() const override;
33
34 std::string name() const override;
35
36 OFB* clone() const override;
37
38 void clear() override;
39
40 /**
41 * @param cipher the block cipher to use
42 */
43 explicit OFB(BlockCipher* cipher);
44
45 void seek(uint64_t offset) override;
46 private:
47 void key_schedule(const uint8_t key[], size_t key_len) override;
48
49 std::unique_ptr<BlockCipher> m_cipher;
50 secure_vector<uint8_t> m_buffer;
51 size_t m_buf_pos;
52 };
53
54}
55
56#endif
Botan::BlockCipher
Definition: block_cipher.h:22
Botan::Key_Length_Specification
Definition: sym_algo.h:20
Botan::OFB
Definition: ofb.h:22
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