Botan 3.3.0
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
9#include <botan/block_cipher.h>
10#include <botan/internal/ffi_util.h>
11
12extern "C" {
13
14using namespace Botan_FFI;
15
16BOTAN_FFI_DECLARE_STRUCT(botan_block_cipher_struct, Botan::BlockCipher, 0x64C29716);
17
18int botan_block_cipher_init(botan_block_cipher_t* bc, const char* bc_name) {
19 return ffi_guard_thunk(__func__, [=]() -> int {
20 if(bc == nullptr || bc_name == nullptr || *bc_name == 0) {
22 }
23
24 *bc = nullptr;
25
26 auto cipher = Botan::BlockCipher::create(bc_name);
27 if(cipher == nullptr) {
29 }
30
31 *bc = new botan_block_cipher_struct(std::move(cipher));
32 return BOTAN_FFI_SUCCESS;
33 });
34}
35
36/**
37* Destroy a block cipher object
38*/
42
44 return BOTAN_FFI_VISIT(bc, [](auto& b) { b.clear(); });
45}
46
47/**
48* Set the key for a block cipher instance
49*/
50int botan_block_cipher_set_key(botan_block_cipher_t bc, const uint8_t key[], size_t len) {
51 if(key == nullptr) {
53 }
54 return BOTAN_FFI_VISIT(bc, [=](auto& b) { b.set_key(key, len); });
55}
56
57/**
58* Return the positive block size of this block cipher, or negative to
59* indicate an error
60*/
62 return BOTAN_FFI_VISIT(bc, [](const auto& b) { return static_cast<int>(b.block_size()); });
63}
64
65int botan_block_cipher_encrypt_blocks(botan_block_cipher_t bc, const uint8_t in[], uint8_t out[], size_t blocks) {
66 if(in == nullptr || out == nullptr) {
68 }
69 return BOTAN_FFI_VISIT(bc, [=](const auto& b) { b.encrypt_n(in, out, blocks); });
70}
71
72int botan_block_cipher_decrypt_blocks(botan_block_cipher_t bc, const uint8_t in[], uint8_t out[], size_t blocks) {
73 if(in == nullptr || out == nullptr) {
75 }
76 return BOTAN_FFI_VISIT(bc, [=](const auto& b) { b.decrypt_n(in, out, blocks); });
77}
78
79int botan_block_cipher_name(botan_block_cipher_t cipher, char* name, size_t* name_len) {
80 if(name_len == nullptr) {
82 }
83
84 return BOTAN_FFI_VISIT(cipher, [=](const auto& bc) { return write_str_output(name, name_len, bc.name()); });
85}
86
88 size_t* out_minimum_keylength,
89 size_t* out_maximum_keylength,
90 size_t* out_keylength_modulo) {
91 return BOTAN_FFI_VISIT(cipher, [=](const auto& bc) {
92 if(out_minimum_keylength)
93 *out_minimum_keylength = bc.minimum_keylength();
94 if(out_maximum_keylength)
95 *out_maximum_keylength = bc.maximum_keylength();
96 if(out_keylength_modulo)
97 *out_keylength_modulo = bc.key_spec().keylength_multiple();
98 });
99}
100}
static std::unique_ptr< BlockCipher > create(std::string_view algo_spec, std::string_view provider="")
std::string name
struct botan_block_cipher_struct * botan_block_cipher_t
Definition ffi.h:782
@ BOTAN_FFI_ERROR_NOT_IMPLEMENTED
Definition ffi.h:110
@ BOTAN_FFI_ERROR_NULL_POINTER
Definition ffi.h:104
@ BOTAN_FFI_SUCCESS
Definition ffi.h:89
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:87
int botan_block_cipher_clear(botan_block_cipher_t bc)
Definition ffi_block.cpp:43
int botan_block_cipher_init(botan_block_cipher_t *bc, const char *bc_name)
Definition ffi_block.cpp:18
int botan_block_cipher_block_size(botan_block_cipher_t bc)
Definition ffi_block.cpp:61
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:72
int botan_block_cipher_name(botan_block_cipher_t cipher, char *name, size_t *name_len)
Definition ffi_block.cpp:79
int botan_block_cipher_destroy(botan_block_cipher_t bc)
Definition ffi_block.cpp:39
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:65
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_VISIT(obj, lambda)
Definition ffi_util.h:124
#define BOTAN_FFI_CHECKED_DELETE(o)
Definition ffi_util.h:143
#define BOTAN_FFI_DECLARE_STRUCT(NAME, TYPE, MAGIC)
Definition ffi_util.h:51
int write_str_output(uint8_t out[], size_t *out_len, std::string_view str)
Definition ffi_util.h:205
int ffi_guard_thunk(const char *func_name, const std::function< int()> &thunk)
Definition ffi.cpp:116