Botan  2.15.0
Crypto and TLS for C++11
ffi_pk_op.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/internal/ffi_pkey.h>
10 #include <botan/internal/ffi_rng.h>
11 #include <botan/pubkey.h>
12 
13 extern "C" {
14 
15 using namespace Botan_FFI;
16 
17 BOTAN_FFI_DECLARE_STRUCT(botan_pk_op_encrypt_struct, Botan::PK_Encryptor, 0x891F3FC3);
18 BOTAN_FFI_DECLARE_STRUCT(botan_pk_op_decrypt_struct, Botan::PK_Decryptor, 0x912F3C37);
19 BOTAN_FFI_DECLARE_STRUCT(botan_pk_op_sign_struct, Botan::PK_Signer, 0x1AF0C39F);
20 BOTAN_FFI_DECLARE_STRUCT(botan_pk_op_verify_struct, Botan::PK_Verifier, 0x2B91F936);
21 BOTAN_FFI_DECLARE_STRUCT(botan_pk_op_ka_struct, Botan::PK_Key_Agreement, 0x2939CAB1);
22 
24  botan_pubkey_t key_obj,
25  const char* padding,
26  uint32_t flags)
27  {
28  if(op == nullptr)
30 
33 
34  return ffi_guard_thunk(__func__, [=]() -> int {
35  *op = nullptr;
36 
37  std::unique_ptr<Botan::PK_Encryptor> pk(new Botan::PK_Encryptor_EME(safe_get(key_obj), Botan::system_rng(), padding));
38  *op = new botan_pk_op_encrypt_struct(pk.release());
39  return BOTAN_FFI_SUCCESS;
40  });
41  }
42 
44  {
45  return BOTAN_FFI_CHECKED_DELETE(op);
46  }
47 
48 int botan_pk_op_encrypt_output_length(botan_pk_op_encrypt_t op, size_t ptext_len, size_t* ctext_len)
49  {
50  if(ctext_len == nullptr)
52  return BOTAN_FFI_DO(Botan::PK_Encryptor, op, o, { *ctext_len = o.ciphertext_length(ptext_len); });
53  }
54 
56  botan_rng_t rng_obj,
57  uint8_t out[], size_t* out_len,
58  const uint8_t plaintext[], size_t plaintext_len)
59  {
60  return BOTAN_FFI_DO(Botan::PK_Encryptor, op, o, {
61  return write_vec_output(out, out_len, o.encrypt(plaintext, plaintext_len, safe_get(rng_obj)));
62  });
63  }
64 
65 /*
66 * Public Key Decryption
67 */
69  botan_privkey_t key_obj,
70  const char* padding,
71  uint32_t flags)
72  {
73  if(op == nullptr)
75 
76  if(flags != 0)
78 
79  return ffi_guard_thunk(__func__, [=]() -> int {
80  *op = nullptr;
81 
82  std::unique_ptr<Botan::PK_Decryptor> pk(new Botan::PK_Decryptor_EME(safe_get(key_obj), Botan::system_rng(), padding));
83  *op = new botan_pk_op_decrypt_struct(pk.release());
84  return BOTAN_FFI_SUCCESS;
85  });
86  }
87 
89  {
90  return BOTAN_FFI_CHECKED_DELETE(op);
91  }
92 
93 int botan_pk_op_decrypt_output_length(botan_pk_op_decrypt_t op, size_t ctext_len, size_t* ptext_len)
94  {
95  if(ptext_len == nullptr)
97  return BOTAN_FFI_DO(Botan::PK_Decryptor, op, o, { *ptext_len = o.plaintext_length(ctext_len); });
98  }
99 
101  uint8_t out[], size_t* out_len,
102  const uint8_t ciphertext[], size_t ciphertext_len)
103  {
104  return BOTAN_FFI_DO(Botan::PK_Decryptor, op, o, {
105  return write_vec_output(out, out_len, o.decrypt(ciphertext, ciphertext_len));
106  });
107  }
108 
109 /*
110 * Signature Generation
111 */
113  botan_privkey_t key_obj,
114  const char* hash,
115  uint32_t flags)
116  {
117  if(op == nullptr)
119 
122 
123  return ffi_guard_thunk(__func__, [=]() -> int {
124  *op = nullptr;
125 
127 
128  std::unique_ptr<Botan::PK_Signer> pk(new Botan::PK_Signer(safe_get(key_obj), Botan::system_rng(), hash, format));
129  *op = new botan_pk_op_sign_struct(pk.release());
130  return BOTAN_FFI_SUCCESS;
131  });
132  }
133 
135  {
136  return BOTAN_FFI_CHECKED_DELETE(op);
137  }
138 
140  {
141  if(sig_len == nullptr)
143 
144  return BOTAN_FFI_DO(Botan::PK_Signer, op, o, { *sig_len = o.signature_length(); });
145  }
146 
147 int botan_pk_op_sign_update(botan_pk_op_sign_t op, const uint8_t in[], size_t in_len)
148  {
149  return BOTAN_FFI_DO(Botan::PK_Signer, op, o, { o.update(in, in_len); });
150  }
151 
152 int botan_pk_op_sign_finish(botan_pk_op_sign_t op, botan_rng_t rng_obj, uint8_t out[], size_t* out_len)
153  {
154  return BOTAN_FFI_DO(Botan::PK_Signer, op, o, {
155  return write_vec_output(out, out_len, o.signature(safe_get(rng_obj)));
156  });
157  }
158 
160  botan_pubkey_t key_obj,
161  const char* hash,
162  uint32_t flags)
163  {
164  if(op == nullptr)
166 
169 
170  return ffi_guard_thunk(__func__, [=]() -> int {
171  *op = nullptr;
173  std::unique_ptr<Botan::PK_Verifier> pk(new Botan::PK_Verifier(safe_get(key_obj), hash, format));
174  *op = new botan_pk_op_verify_struct(pk.release());
175  return BOTAN_FFI_SUCCESS;
176  });
177  }
178 
180  {
181  return BOTAN_FFI_CHECKED_DELETE(op);
182  }
183 
184 int botan_pk_op_verify_update(botan_pk_op_verify_t op, const uint8_t in[], size_t in_len)
185  {
186  return BOTAN_FFI_DO(Botan::PK_Verifier, op, o, { o.update(in, in_len); });
187  }
188 
189 int botan_pk_op_verify_finish(botan_pk_op_verify_t op, const uint8_t sig[], size_t sig_len)
190  {
191  return BOTAN_FFI_RETURNING(Botan::PK_Verifier, op, o, {
192  const bool legit = o.check_signature(sig, sig_len);
193 
194  if(legit)
195  return BOTAN_FFI_SUCCESS;
196  else
198  });
199  }
200 
202  botan_privkey_t key_obj,
203  const char* kdf,
204  uint32_t flags)
205  {
206  if(op == nullptr)
208 
209  if(flags != 0)
211 
212  return ffi_guard_thunk(__func__, [=]() -> int {
213  *op = nullptr;
214  std::unique_ptr<Botan::PK_Key_Agreement> pk(new Botan::PK_Key_Agreement(safe_get(key_obj), Botan::system_rng(), kdf));
215  *op = new botan_pk_op_ka_struct(pk.release());
216  return BOTAN_FFI_SUCCESS;
217  });
218  }
219 
221  {
222  return BOTAN_FFI_CHECKED_DELETE(op);
223  }
224 
226  uint8_t out[], size_t* out_len)
227  {
228  return BOTAN_FFI_DO(Botan::Private_Key, key, k, {
229  if(auto kak = dynamic_cast<const Botan::PK_Key_Agreement_Key*>(&k))
230  return write_vec_output(out, out_len, kak->public_value());
232  });
233  }
234 
236  {
237  return BOTAN_FFI_DO(Botan::PK_Key_Agreement, op, o, {
238  if(out_len == nullptr)
240  *out_len = o.agreed_value_size();
241  });
242  }
243 
245  uint8_t out[], size_t* out_len,
246  const uint8_t other_key[], size_t other_key_len,
247  const uint8_t salt[], size_t salt_len)
248  {
249  return BOTAN_FFI_DO(Botan::PK_Key_Agreement, op, o, {
250  auto k = o.derive_key(*out_len, other_key, other_key_len, salt, salt_len).bits_of();
251  return write_vec_output(out, out_len, k);
252  });
253  }
254 
255 }
int ffi_guard_thunk(const char *func_name, std::function< int()> thunk)
Definition: ffi.cpp:89
int botan_pk_op_sign_destroy(botan_pk_op_sign_t op)
Definition: ffi_pk_op.cpp:134
RandomNumberGenerator & system_rng()
Definition: system_rng.cpp:283
size_t signature_length() const
Definition: pubkey.cpp:270
int botan_pk_op_sign_finish(botan_pk_op_sign_t op, botan_rng_t rng_obj, uint8_t out[], size_t *out_len)
Definition: ffi_pk_op.cpp:152
int botan_pk_op_key_agreement_destroy(botan_pk_op_ka_t op)
Definition: ffi_pk_op.cpp:220
struct botan_pk_op_encrypt_struct * botan_pk_op_encrypt_t
Definition: ffi.h:1360
int botan_pk_op_key_agreement_create(botan_pk_op_ka_t *op, botan_privkey_t key_obj, const char *kdf, uint32_t flags)
Definition: ffi_pk_op.cpp:201
int botan_pk_op_key_agreement(botan_pk_op_ka_t op, uint8_t out[], size_t *out_len, const uint8_t other_key[], size_t other_key_len, const uint8_t salt[], size_t salt_len)
Definition: ffi_pk_op.cpp:244
struct botan_pk_op_sign_struct * botan_pk_op_sign_t
Definition: ffi.h:1412
Flags flags(Flag flags)
Definition: p11.h:858
BOTAN_FFI_DECLARE_STRUCT(botan_pk_op_encrypt_struct, Botan::PK_Encryptor, 0x891F3FC3)
int write_vec_output(uint8_t out[], size_t *out_len, const std::vector< uint8_t, Alloc > &buf)
Definition: ffi_util.h:155
void update(uint8_t in)
Definition: pubkey.h:347
int botan_pk_op_sign_update(botan_pk_op_sign_t op, const uint8_t in[], size_t in_len)
Definition: ffi_pk_op.cpp:147
int botan_pk_op_key_agreement_export_public(botan_privkey_t key, uint8_t out[], size_t *out_len)
Definition: ffi_pk_op.cpp:225
int botan_pk_op_decrypt_create(botan_pk_op_decrypt_t *op, botan_privkey_t key_obj, const char *padding, uint32_t flags)
Definition: ffi_pk_op.cpp:68
int botan_pk_op_verify_create(botan_pk_op_verify_t *op, botan_pubkey_t key_obj, const char *hash, uint32_t flags)
Definition: ffi_pk_op.cpp:159
int botan_pk_op_encrypt_output_length(botan_pk_op_encrypt_t op, size_t ptext_len, size_t *ctext_len)
Definition: ffi_pk_op.cpp:48
struct botan_pk_op_decrypt_struct * botan_pk_op_decrypt_t
Definition: ffi.h:1386
int botan_pk_op_verify_finish(botan_pk_op_verify_t op, const uint8_t sig[], size_t sig_len)
Definition: ffi_pk_op.cpp:189
int botan_pk_op_decrypt(botan_pk_op_decrypt_t op, uint8_t out[], size_t *out_len, const uint8_t ciphertext[], size_t ciphertext_len)
Definition: ffi_pk_op.cpp:100
void update(uint8_t in)
Definition: pubkey.h:238
int botan_pk_op_verify_update(botan_pk_op_verify_t op, const uint8_t in[], size_t in_len)
Definition: ffi_pk_op.cpp:184
size_t salt_len
Definition: x509_obj.cpp:25
SymmetricKey derive_key(size_t key_len, const uint8_t in[], size_t in_len, const uint8_t params[], size_t params_len) const
Definition: pubkey.cpp:218
#define BOTAN_FFI_RETURNING(T, obj, param, block)
Definition: ffi_util.h:101
struct botan_pk_op_verify_struct * botan_pk_op_verify_t
Definition: ffi.h:1436
#define BOTAN_FFI_CHECKED_DELETE(o)
Definition: ffi_util.h:129
struct botan_privkey_struct * botan_privkey_t
Definition: ffi.h:951
int botan_pk_op_key_agreement_size(botan_pk_op_ka_t op, size_t *out_len)
Definition: ffi_pk_op.cpp:235
T & safe_get(botan_struct< T, M > *p)
Definition: ffi_util.h:61
int botan_pk_op_encrypt_create(botan_pk_op_encrypt_t *op, botan_pubkey_t key_obj, const char *padding, uint32_t flags)
Definition: ffi_pk_op.cpp:23
bool check_signature(const uint8_t sig[], size_t length)
Definition: pubkey.cpp:336
int botan_pk_op_decrypt_destroy(botan_pk_op_decrypt_t op)
Definition: ffi_pk_op.cpp:88
#define BOTAN_PUBKEY_DER_FORMAT_SIGNATURE
Definition: ffi.h:1410
int botan_pk_op_sign_create(botan_pk_op_sign_t *op, botan_privkey_t key_obj, const char *hash, uint32_t flags)
Definition: ffi_pk_op.cpp:112
struct botan_pk_op_ka_struct * botan_pk_op_ka_t
Definition: ffi.h:1455
int botan_pk_op_decrypt_output_length(botan_pk_op_decrypt_t op, size_t ctext_len, size_t *ptext_len)
Definition: ffi_pk_op.cpp:93
int botan_pk_op_encrypt_destroy(botan_pk_op_encrypt_t op)
Definition: ffi_pk_op.cpp:43
secure_vector< uint8_t > bits_of() const
Definition: symkey.h:31
struct botan_pubkey_struct * botan_pubkey_t
Definition: ffi.h:1098
virtual size_t plaintext_length(size_t ctext_len) const =0
#define BOTAN_FFI_DO(T, obj, param, block)
Definition: ffi_util.h:92
int botan_pk_op_verify_destroy(botan_pk_op_verify_t op)
Definition: ffi_pk_op.cpp:179
virtual size_t ciphertext_length(size_t ctext_len) const =0
MechanismType hash
struct botan_rng_struct * botan_rng_t
Definition: ffi.h:189
int botan_pk_op_encrypt(botan_pk_op_encrypt_t op, botan_rng_t rng_obj, uint8_t out[], size_t *out_len, const uint8_t plaintext[], size_t plaintext_len)
Definition: ffi_pk_op.cpp:55
int botan_pk_op_sign_output_length(botan_pk_op_sign_t op, size_t *sig_len)
Definition: ffi_pk_op.cpp:139