8#ifndef BOTAN_STREAM_MODE_H_
9#define BOTAN_STREAM_MODE_H_
11#include <botan/cipher_mode.h>
13#if defined(BOTAN_HAS_STREAM_CIPHER)
14 #include <botan/stream_cipher.h>
19#if defined(BOTAN_HAS_STREAM_CIPHER)
21class Stream_Cipher_Mode
final :
public Cipher_Mode
27 explicit Stream_Cipher_Mode(std::unique_ptr<StreamCipher> cipher) :
28 m_cipher(
std::move(cipher)) {}
30 size_t output_length(
size_t input_length)
const override {
return input_length; }
32 size_t update_granularity()
const override {
return 1; }
34 size_t ideal_granularity()
const override
36 const size_t buf_size = m_cipher->buffer_size();
40 return buf_size * (256 / buf_size);
43 size_t minimum_final_size()
const override {
return 0; }
45 size_t default_nonce_length()
const override {
return 0; }
47 bool valid_nonce_length(
size_t nonce_len)
const override
48 {
return m_cipher->valid_iv_length(nonce_len); }
50 Key_Length_Specification key_spec()
const override {
return m_cipher->key_spec(); }
52 std::string
name()
const override {
return m_cipher->name(); }
60 void reset()
override { }
62 bool has_keying_material()
const override {
return m_cipher->has_keying_material(); }
65 void start_msg(
const uint8_t nonce[],
size_t nonce_len)
override
69 m_cipher->set_iv(nonce, nonce_len);
73 size_t process_msg(uint8_t buf[],
size_t sz)
override
75 m_cipher->cipher1(buf, sz);
79 void finish_msg(secure_vector<uint8_t>& buf,
size_t offset)
override
80 {
return update(buf, offset); }
82 void key_schedule(
const uint8_t key[],
size_t length)
override
84 m_cipher->set_key(key, length);
87 std::unique_ptr<StreamCipher> m_cipher;
#define BOTAN_ASSERT_NOMSG(expr)
int(* update)(CTX *, const void *, CC_LONG len)
int(* final)(unsigned char *, CTX *)