Botan  2.9.0
Crypto and TLS for C++11
ffi_hash.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/hash.h>
10 
11 extern "C" {
12 
13 using namespace Botan_FFI;
14 
15 BOTAN_FFI_DECLARE_STRUCT(botan_hash_struct, Botan::HashFunction, 0x1F0A4F84);
16 
17 int botan_hash_init(botan_hash_t* hash, const char* hash_name, uint32_t flags)
18  {
19  return ffi_guard_thunk(__func__, [=]() -> int {
20  if(hash == nullptr || hash_name == nullptr || *hash_name == 0)
22  if(flags != 0)
24 
25  std::unique_ptr<Botan::HashFunction> h = Botan::HashFunction::create(hash_name);
26  if(h == nullptr)
28 
29  *hash = new botan_hash_struct(h.release());
30  return BOTAN_FFI_SUCCESS;
31  });
32  }
33 
35  {
37  }
38 
40  {
41  if(out == nullptr)
43  return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { *out = h.output_length(); });
44  }
45 
47  {
48  if(out == nullptr)
50  return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { *out = h.hash_block_size(); });
51  }
52 
54  {
55  return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.clear(); });
56  }
57 
58 int botan_hash_update(botan_hash_t hash, const uint8_t* buf, size_t len)
59  {
60  if(len == 0)
61  return 0;
62 
63  if(buf == nullptr)
65 
66  return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.update(buf, len); });
67  }
68 
69 int botan_hash_final(botan_hash_t hash, uint8_t out[])
70  {
71  if(out == nullptr)
73  return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.final(out); });
74  }
75 
77  {
78  return BOTAN_FFI_DO(Botan::HashFunction, source, src, {
79  *dest = new botan_hash_struct(src.copy_state().release()); });
80  }
81 
82 int botan_hash_name(botan_hash_t hash, char* name, size_t* name_len)
83  {
84  if(name_len == nullptr)
86 
88  return write_str_output(name, name_len, h.name()); });
89  }
90 
91 }
int ffi_guard_thunk(const char *func_name, std::function< int()> thunk)
Definition: ffi.cpp:81
int botan_hash_copy_state(botan_hash_t *dest, const botan_hash_t source)
Definition: ffi_hash.cpp:76
int botan_hash_name(botan_hash_t hash, char *name, size_t *name_len)
Definition: ffi_hash.cpp:82
int botan_hash_update(botan_hash_t hash, const uint8_t *buf, size_t len)
Definition: ffi_hash.cpp:58
Flags flags(Flag flags)
Definition: p11.h:858
BOTAN_FFI_DECLARE_STRUCT(botan_hash_struct, Botan::HashFunction, 0x1F0A4F84)
int botan_hash_final(botan_hash_t hash, uint8_t out[])
Definition: ffi_hash.cpp:69
int write_str_output(uint8_t out[], size_t *out_len, const std::string &str)
Definition: ffi_util.h:147
std::string name
struct botan_hash_struct * botan_hash_t
Definition: ffi.h:252
int botan_hash_block_size(botan_hash_t hash, size_t *out)
Definition: ffi_hash.cpp:46
static std::unique_ptr< HashFunction > create(const std::string &algo_spec, const std::string &provider="")
Definition: hash.cpp:110
int botan_hash_output_length(botan_hash_t hash, size_t *out)
Definition: ffi_hash.cpp:39
#define BOTAN_FFI_CHECKED_DELETE(o)
Definition: ffi_util.h:116
int botan_hash_init(botan_hash_t *hash, const char *hash_name, uint32_t flags)
Definition: ffi_hash.cpp:17
int botan_hash_destroy(botan_hash_t hash)
Definition: ffi_hash.cpp:34
#define BOTAN_FFI_DO(T, obj, param, block)
Definition: ffi_util.h:88
MechanismType hash
int botan_hash_clear(botan_hash_t hash)
Definition: ffi_hash.cpp:53