Botan 2.19.1
Crypto and TLS for C&
ffi_mac.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/mac.h>
10
11extern "C" {
12
13using namespace Botan_FFI;
14
16
17int botan_mac_init(botan_mac_t* mac, const char* mac_name, uint32_t flags)
18 {
19 return ffi_guard_thunk(__func__, [=]() -> int {
20 if(!mac || !mac_name || flags != 0)
22
23 std::unique_ptr<Botan::MessageAuthenticationCode> m =
25
26 if(m == nullptr)
28
29 *mac = new botan_mac_struct(m.release());
30 return BOTAN_FFI_SUCCESS;
31 });
32 }
33
35 {
36 return BOTAN_FFI_CHECKED_DELETE(mac);
37 }
38
39int botan_mac_set_key(botan_mac_t mac, const uint8_t* key, size_t key_len)
40 {
41 return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.set_key(key, key_len); });
42 }
43
45 {
46 return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { *out = m.output_length(); });
47 }
48
50 {
51 return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.clear(); });
52 }
53
54int botan_mac_update(botan_mac_t mac, const uint8_t* buf, size_t len)
55 {
56 return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.update(buf, len); });
57 }
58
59int botan_mac_final(botan_mac_t mac, uint8_t out[])
60 {
61 return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.final(out); });
62 }
63
64int botan_mac_name(botan_mac_t mac, char* name, size_t* name_len)
65 {
67 return write_str_output(name, name_len, m.name()); });
68 }
69
71 size_t* out_minimum_keylength,
72 size_t* out_maximum_keylength,
73 size_t* out_keylength_modulo)
74 {
76 if(out_minimum_keylength)
77 *out_minimum_keylength = m.minimum_keylength();
78 if(out_maximum_keylength)
79 *out_maximum_keylength = m.maximum_keylength();
80 if(out_keylength_modulo)
81 *out_keylength_modulo = m.key_spec().keylength_multiple();
82 });
83 }
84
85}
void update(const uint8_t in[], size_t length)
Definition: buf_comp.h:33
virtual size_t output_length() const =0
void final(uint8_t out[])
Definition: buf_comp.h:83
static std::unique_ptr< MessageAuthenticationCode > create(const std::string &algo_spec, const std::string &provider="")
Definition: mac.cpp:46
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_mac_struct * botan_mac_t
Definition: ffi.h:351
@ 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_mac_init(botan_mac_t *mac, const char *mac_name, uint32_t flags)
Definition: ffi_mac.cpp:17
int botan_mac_destroy(botan_mac_t mac)
Definition: ffi_mac.cpp:34
int botan_mac_final(botan_mac_t mac, uint8_t out[])
Definition: ffi_mac.cpp:59
int botan_mac_update(botan_mac_t mac, const uint8_t *buf, size_t len)
Definition: ffi_mac.cpp:54
int botan_mac_output_length(botan_mac_t mac, size_t *out)
Definition: ffi_mac.cpp:44
BOTAN_FFI_DECLARE_STRUCT(botan_mac_struct, Botan::MessageAuthenticationCode, 0xA06E8FC1)
int botan_mac_name(botan_mac_t mac, char *name, size_t *name_len)
Definition: ffi_mac.cpp:64
int botan_mac_get_keyspec(botan_mac_t mac, size_t *out_minimum_keylength, size_t *out_maximum_keylength, size_t *out_keylength_modulo)
Definition: ffi_mac.cpp:70
int botan_mac_set_key(botan_mac_t mac, const uint8_t *key, size_t key_len)
Definition: ffi_mac.cpp:39
int botan_mac_clear(botan_mac_t mac)
Definition: ffi_mac.cpp:49
#define BOTAN_FFI_DO(T, obj, param, block)
Definition: ffi_util.h:92
#define BOTAN_FFI_CHECKED_DELETE(o)
Definition: ffi_util.h:129
Flags flags(Flag flags)
Definition: p11.h:860
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