Botan 2.19.1
Crypto and TLS for C&
ffi_block.cpp
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1/*
2* (C) 2015,2017 Jack Lloyd
3*
4* Botan is released under the Simplified BSD License (see license.txt)
5*/
6
7#include <botan/ffi.h>
8#include <botan/internal/ffi_util.h>
9#include <botan/block_cipher.h>
10
11extern "C" {
12
13using namespace Botan_FFI;
14
15BOTAN_FFI_DECLARE_STRUCT(botan_block_cipher_struct, Botan::BlockCipher, 0x64C29716);
16
17int botan_block_cipher_init(botan_block_cipher_t* bc, const char* bc_name)
18 {
19 return ffi_guard_thunk(__func__, [=]() -> int {
20 if(bc == nullptr || bc_name == nullptr || *bc_name == 0)
22
23 *bc = nullptr;
24
25 std::unique_ptr<Botan::BlockCipher> cipher(Botan::BlockCipher::create(bc_name));
26 if(cipher == nullptr)
28
29 *bc = new botan_block_cipher_struct(cipher.release());
30 return BOTAN_FFI_SUCCESS;
31 });
32 }
33
34/**
35* Destroy a block cipher object
36*/
38 {
39 return BOTAN_FFI_CHECKED_DELETE(bc);
40 }
41
43 {
44 return BOTAN_FFI_DO(Botan::BlockCipher, bc, b, { b.clear(); });
45 }
46
47/**
48* Set the key for a block cipher instance
49*/
51 const uint8_t key[], size_t len)
52 {
53 if(key == nullptr)
55 return BOTAN_FFI_DO(Botan::BlockCipher, bc, b, { b.set_key(key, len); });
56 }
57
58/**
59* Return the positive block size of this block cipher, or negative to
60* indicate an error
61*/
63 {
65 { return static_cast<int>(b.block_size()); });
66 }
67
69 const uint8_t in[],
70 uint8_t out[],
71 size_t blocks)
72 {
73 if(in == nullptr || out == nullptr)
75 return BOTAN_FFI_DO(Botan::BlockCipher, bc, b, { b.encrypt_n(in, out, blocks); });
76 }
77
79 const uint8_t in[],
80 uint8_t out[],
81 size_t blocks)
82 {
83 if(in == nullptr || out == nullptr)
85 return BOTAN_FFI_DO(Botan::BlockCipher, bc, b, { b.decrypt_n(in, out, blocks); });
86 }
87
88int botan_block_cipher_name(botan_block_cipher_t cipher, char* name, size_t* name_len)
89 {
90 if(name_len == nullptr)
92
93 return BOTAN_FFI_DO(Botan::BlockCipher, cipher, bc, {
94 return write_str_output(name, name_len, bc.name()); });
95 }
96
98 size_t* out_minimum_keylength,
99 size_t* out_maximum_keylength,
100 size_t* out_keylength_modulo)
101 {
102 return BOTAN_FFI_DO(Botan::BlockCipher, cipher, bc, {
103 if(out_minimum_keylength)
104 *out_minimum_keylength = bc.minimum_keylength();
105 if(out_maximum_keylength)
106 *out_maximum_keylength = bc.maximum_keylength();
107 if(out_keylength_modulo)
108 *out_keylength_modulo = bc.key_spec().keylength_multiple();
109 });
110 }
111
112}
static std::unique_ptr< BlockCipher > create(const std::string &algo_spec, const std::string &provider="")
virtual void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const =0
virtual void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const =0
void set_key(const SymmetricKey &key)
Definition: sym_algo.h:147
size_t minimum_keylength() const
Definition: sym_algo.h:128
virtual void clear()=0
std::string name
struct botan_block_cipher_struct * botan_block_cipher_t
Definition: ffi.h:692
@ BOTAN_FFI_ERROR_NOT_IMPLEMENTED
Definition: ffi.h:83
@ BOTAN_FFI_ERROR_NULL_POINTER
Definition: ffi.h:77
@ BOTAN_FFI_SUCCESS
Definition: ffi.h:63
int botan_block_cipher_get_keyspec(botan_block_cipher_t cipher, size_t *out_minimum_keylength, size_t *out_maximum_keylength, size_t *out_keylength_modulo)
Definition: ffi_block.cpp:97
int botan_block_cipher_clear(botan_block_cipher_t bc)
Definition: ffi_block.cpp:42
int botan_block_cipher_init(botan_block_cipher_t *bc, const char *bc_name)
Definition: ffi_block.cpp:17
int botan_block_cipher_block_size(botan_block_cipher_t bc)
Definition: ffi_block.cpp:62
int botan_block_cipher_decrypt_blocks(botan_block_cipher_t bc, const uint8_t in[], uint8_t out[], size_t blocks)
Definition: ffi_block.cpp:78
int botan_block_cipher_name(botan_block_cipher_t cipher, char *name, size_t *name_len)
Definition: ffi_block.cpp:88
BOTAN_FFI_DECLARE_STRUCT(botan_block_cipher_struct, Botan::BlockCipher, 0x64C29716)
int botan_block_cipher_destroy(botan_block_cipher_t bc)
Definition: ffi_block.cpp:37
int botan_block_cipher_encrypt_blocks(botan_block_cipher_t bc, const uint8_t in[], uint8_t out[], size_t blocks)
Definition: ffi_block.cpp:68
int botan_block_cipher_set_key(botan_block_cipher_t bc, const uint8_t key[], size_t len)
Definition: ffi_block.cpp:50
#define BOTAN_FFI_DO(T, obj, param, block)
Definition: ffi_util.h:92
#define BOTAN_FFI_CHECKED_DELETE(o)
Definition: ffi_util.h:129
#define BOTAN_FFI_RETURNING(T, obj, param, block)
Definition: ffi_util.h:101
int ffi_guard_thunk(const char *func_name, std::function< int()> thunk)
Definition: ffi.cpp:89
int write_str_output(uint8_t out[], size_t *out_len, const std::string &str)
Definition: ffi_util.h:160