26864473078

Committed 02 Jun 2026 07:58PM UTC coverage: 89.389% (+0.02%) from 89.37%

Build # 26864473078

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push

github

Committed by

web-flow

Commit Message

Merge pull request #5639 from randombit/jack/sm4-hwaes-ks

Add hwaes hook for SM4 key schedule

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110434 of 123543 relevant lines covered (89.39%)

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96.04

/src/lib/ffi/ffi_mp.cpp

/*
* (C) 2015,2017 Jack Lloyd
* (C) 2017 Ribose Inc
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/ffi.h>

#include <botan/assert.h>
#include <botan/numthry.h>
#include <botan/internal/barrett.h>
#include <botan/internal/divide.h>
#include <botan/internal/ffi_mp.h>
#include <botan/internal/ffi_rng.h>
#include <botan/internal/ffi_util.h>
#include <botan/internal/mem_utils.h>
#include <botan/internal/mod_inv.h>

extern "C" {

using namespace Botan_FFI;

int botan_mp_init(botan_mp_t* mp_out) {
   return ffi_guard_thunk(__func__, [=]() -> int {
      if(mp_out == nullptr) {
         return BOTAN_FFI_ERROR_NULL_POINTER;
      }

      auto mp = std::make_unique<Botan::BigInt>();
      return ffi_new_object(mp_out, std::move(mp));
   });
}

int botan_mp_clear(botan_mp_t mp) {
   return BOTAN_FFI_VISIT(mp, [](auto& bn) { bn.clear(); });
}

int botan_mp_set_from_int(botan_mp_t mp, int initial_value) {
   return BOTAN_FFI_VISIT(mp, [=](auto& bn) { bn = Botan::BigInt::from_s32(initial_value); });
}

int botan_mp_set_from_str(botan_mp_t mp, const char* str) {
   if(str == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }

   return BOTAN_FFI_VISIT(mp, [=](auto& bn) { bn = Botan::BigInt(str); });
}

int botan_mp_set_from_radix_str(botan_mp_t mp, const char* str, size_t radix) {
   if(str == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }

   return BOTAN_FFI_VISIT(mp, [=](auto& bn) {
      if(radix != 10 && radix != 16) {
         return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
      }

      bn = Botan::BigInt::from_radix_digits(std::string_view(str), radix);
      return BOTAN_FFI_SUCCESS;
   });
}

// NOLINTBEGIN(misc-misplaced-const)

int botan_mp_set_from_mp(botan_mp_t dest, const botan_mp_t source) {
   return BOTAN_FFI_VISIT(dest, [=](auto& bn) { bn = safe_get(source); });
}

int botan_mp_is_negative(const botan_mp_t mp) {
   return BOTAN_FFI_VISIT(mp, [](const auto& bn) { return bn.signum() < 0 ? 1 : 0; });
}

int botan_mp_is_positive(const botan_mp_t mp) {
   return BOTAN_FFI_VISIT(mp, [](const auto& bn) { return bn.signum() >= 0 ? 1 : 0; });
}

int botan_mp_flip_sign(botan_mp_t mp) {
   return BOTAN_FFI_VISIT(mp, [](auto& bn) { bn.flip_sign(); });
}

int botan_mp_from_bin(botan_mp_t mp, const uint8_t bin[], size_t bin_len) {
   if(bin_len > 0 && bin == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }
   return BOTAN_FFI_VISIT(mp, [=](auto& bn) { bn._assign_from_bytes({bin, bin_len}); });
}

int botan_mp_to_hex(const botan_mp_t mp, char* out) {
   if(out == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }
   return BOTAN_FFI_VISIT(mp, [=](const auto& bn) {
      const std::string hex = bn.to_hex_string();

      // Check that we are about to write no more than the documented upper bound
      const size_t upper_bound = 2 * bn.bytes() + 5;
      BOTAN_ASSERT_NOMSG(hex.size() + 1 <= upper_bound);
      std::memcpy(out, hex.c_str(), 1 + hex.size());
   });
}

int botan_mp_view_hex(const botan_mp_t mp, botan_view_ctx ctx, botan_view_str_fn view) {
   return BOTAN_FFI_VISIT(mp, [=](const auto& bn) -> int {
      const std::string hex = bn.to_hex_string();
      return invoke_view_callback(view, ctx, hex);
   });
}

int botan_mp_to_str(const botan_mp_t mp, uint8_t radix, char* out, size_t* out_len) {
   return BOTAN_FFI_VISIT(mp, [=](const auto& bn) -> int {
      if(radix == 0 || radix == 10) {
         return write_str_output(out, out_len, bn.to_dec_string());
      } else if(radix == 16) {
         return write_str_output(out, out_len, bn.to_hex_string());
      } else {
         return BOTAN_FFI_ERROR_BAD_PARAMETER;
      }
   });
}

int botan_mp_view_str(const botan_mp_t mp, uint8_t radix, botan_view_ctx ctx, botan_view_str_fn view) {
   return BOTAN_FFI_VISIT(mp, [=](const auto& bn) -> int {
      if(radix == 10) {
         return invoke_view_callback(view, ctx, bn.to_dec_string());
      } else if(radix == 16) {
         return invoke_view_callback(view, ctx, bn.to_hex_string());
      } else {
         return BOTAN_FFI_ERROR_BAD_PARAMETER;
      }
   });
}

int botan_mp_to_bin(const botan_mp_t mp, uint8_t vec[]) {
   if(vec == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }
   return BOTAN_FFI_VISIT(mp, [=](const auto& bn) { bn.serialize_to(std::span{vec, bn.bytes()}); });
}

int botan_mp_view_bin(const botan_mp_t mp, botan_view_ctx ctx, botan_view_bin_fn view) {
   return BOTAN_FFI_VISIT(mp, [=](const auto& bn) {
      const auto bytes = bn.serialize();
      return invoke_view_callback(view, ctx, bytes);
   });
}

int botan_mp_to_uint32(const botan_mp_t mp, uint32_t* val) {
   if(val == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }
   return BOTAN_FFI_VISIT(mp, [=](const auto& bn) { *val = bn.to_u32bit(); });
}

int botan_mp_destroy(botan_mp_t mp) {
   return BOTAN_FFI_CHECKED_DELETE(mp);
}

int botan_mp_add(botan_mp_t result, const botan_mp_t x, const botan_mp_t y) {
   return BOTAN_FFI_VISIT(result, [=](auto& res) {
      if(result == x) {
         res += safe_get(y);
      } else {
         res = safe_get(x) + safe_get(y);
      }
   });
}

int botan_mp_sub(botan_mp_t result, const botan_mp_t x, const botan_mp_t y) {
   return BOTAN_FFI_VISIT(result, [=](auto& res) {
      if(result == x) {
         res -= safe_get(y);
      } else {
         res = safe_get(x) - safe_get(y);
      }
   });
}

int botan_mp_add_u32(botan_mp_t result, const botan_mp_t x, uint32_t y) {
   return BOTAN_FFI_VISIT(result, [=](auto& res) {
      if(result == x) {
         res += static_cast<Botan::word>(y);
      } else {
         res = safe_get(x) + static_cast<Botan::word>(y);
      }
   });
}

int botan_mp_sub_u32(botan_mp_t result, const botan_mp_t x, uint32_t y) {
   return BOTAN_FFI_VISIT(result, [=](auto& res) {
      if(result == x) {
         res -= static_cast<Botan::word>(y);
      } else {
         res = safe_get(x) - static_cast<Botan::word>(y);
      }
   });
}

int botan_mp_mul(botan_mp_t result, const botan_mp_t x, const botan_mp_t y) {
   return BOTAN_FFI_VISIT(result, [=](auto& res) {
      if(result == x) {
         res *= safe_get(y);
      } else {
         res = safe_get(x) * safe_get(y);
      }
   });
}

int botan_mp_div(botan_mp_t quotient, botan_mp_t remainder, const botan_mp_t x, const botan_mp_t y) {
   return BOTAN_FFI_VISIT(quotient, [=](auto& q) {
      Botan::BigInt r;
      Botan::vartime_divide(safe_get(x), safe_get(y), q, r);
      safe_get(remainder) = r;
   });
}

int botan_mp_equal(const botan_mp_t x_w, const botan_mp_t y_w) {
   return BOTAN_FFI_VISIT(x_w, [=](const auto& x) -> int { return x == safe_get(y_w); });
}

int botan_mp_is_zero(const botan_mp_t mp) {
   return BOTAN_FFI_VISIT(mp, [](const auto& bn) -> int { return bn.is_zero(); });
}

int botan_mp_is_odd(const botan_mp_t mp) {
   return BOTAN_FFI_VISIT(mp, [](const auto& bn) -> int { return bn.is_odd(); });
}

int botan_mp_is_even(const botan_mp_t mp) {
   return BOTAN_FFI_VISIT(mp, [](const auto& bn) -> int { return bn.is_even(); });
}

int botan_mp_cmp(int* result, const botan_mp_t x_w, const botan_mp_t y_w) {
   if(result == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }
   return BOTAN_FFI_VISIT(x_w, [=](auto& x) { *result = x.cmp(safe_get(y_w)); });
}

int botan_mp_swap(botan_mp_t x_w, botan_mp_t y_w) {
   return BOTAN_FFI_VISIT(x_w, [=](auto& x) { x.swap(safe_get(y_w)); });
}

// Return (base^exponent) % modulus
int botan_mp_powmod(botan_mp_t out, const botan_mp_t base, const botan_mp_t exponent, const botan_mp_t modulus) {
   return BOTAN_FFI_VISIT(
      out, [=](auto& o) { o = Botan::power_mod(safe_get(base), safe_get(exponent), safe_get(modulus)); });
}

int botan_mp_lshift(botan_mp_t out, const botan_mp_t in, size_t shift) {
   return BOTAN_FFI_VISIT(out, [=](auto& o) { o = safe_get(in) << shift; });
}

int botan_mp_rshift(botan_mp_t out, const botan_mp_t in, size_t shift) {
   return BOTAN_FFI_VISIT(out, [=](auto& o) { o = safe_get(in) >> shift; });
}

int botan_mp_mod_inverse(botan_mp_t out, const botan_mp_t in, const botan_mp_t modulus) {
   return BOTAN_FFI_VISIT(out, [=](auto& o) {
      o = Botan::inverse_mod_general(safe_get(in), safe_get(modulus)).value_or(Botan::BigInt::zero());
   });
}

int botan_mp_mod_mul(botan_mp_t out, const botan_mp_t x, const botan_mp_t y, const botan_mp_t modulus) {
   return BOTAN_FFI_VISIT(out, [=](auto& o) {
      auto reducer = Botan::Barrett_Reduction::for_secret_modulus(safe_get(modulus));
      o = reducer.multiply(safe_get(x), safe_get(y));
   });
}

int botan_mp_rand_bits(botan_mp_t rand_out, botan_rng_t rng, size_t bits) {
   return BOTAN_FFI_VISIT(rng, [=](auto& r) { safe_get(rand_out).randomize(r, bits); });
}

int botan_mp_rand_range(botan_mp_t rand_out, botan_rng_t rng, const botan_mp_t lower, const botan_mp_t upper) {
   return BOTAN_FFI_VISIT(
      rng, [=](auto& r) { safe_get(rand_out) = Botan::BigInt::random_integer(r, safe_get(lower), safe_get(upper)); });
}

int botan_mp_gcd(botan_mp_t out, const botan_mp_t x, const botan_mp_t y) {
   return BOTAN_FFI_VISIT(out, [=](auto& o) { o = Botan::gcd(safe_get(x), safe_get(y)); });
}

int botan_mp_is_prime(const botan_mp_t mp, botan_rng_t rng, size_t test_prob) {
   return BOTAN_FFI_VISIT(mp, [=](const auto& n) { return (Botan::is_prime(n, safe_get(rng), test_prob)) ? 1 : 0; });
}

int botan_mp_get_bit(const botan_mp_t mp, size_t bit) {
   return BOTAN_FFI_VISIT(mp, [=](const auto& n) -> int { return n.get_bit(bit); });
}

int botan_mp_set_bit(botan_mp_t mp, size_t bit) {
   return BOTAN_FFI_VISIT(mp, [=](auto& n) { n.set_bit(bit); });
}

int botan_mp_clear_bit(botan_mp_t mp, size_t bit) {
   return BOTAN_FFI_VISIT(mp, [=](auto& n) { n.clear_bit(bit); });
}

int botan_mp_num_bits(const botan_mp_t mp, size_t* bits) {
   if(bits == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }
   return BOTAN_FFI_VISIT(mp, [=](const auto& n) { *bits = n.bits(); });
}

int botan_mp_num_bytes(const botan_mp_t mp, size_t* bytes) {
   if(bytes == nullptr) {
      return BOTAN_FFI_ERROR_NULL_POINTER;
   }
   return BOTAN_FFI_VISIT(mp, [=](const auto& n) { *bytes = n.bytes(); });
}

// NOLINTEND(misc-misplaced-const)
}

1	/*
2	* (C) 2015,2017 Jack Lloyd
3	* (C) 2017 Ribose Inc
4	*
5	* Botan is released under the Simplified BSD License (see license.txt)
6	*/
7
8	#include <botan/ffi.h>
9
10	#include <botan/assert.h>
11	#include <botan/numthry.h>
12	#include <botan/internal/barrett.h>
13	#include <botan/internal/divide.h>
14	#include <botan/internal/ffi_mp.h>
15	#include <botan/internal/ffi_rng.h>
16	#include <botan/internal/ffi_util.h>
17	#include <botan/internal/mem_utils.h>
18	#include <botan/internal/mod_inv.h>
19
20	extern "C" {
21
22	using namespace Botan_FFI;
23
24	int botan_mp_init(botan_mp_t* mp_out) {	156✔
25	return ffi_guard_thunk(__func__, [=]() -> int {	156✔
26	if(mp_out == nullptr) {	156✔
27	return BOTAN_FFI_ERROR_NULL_POINTER;
28	}
29
30	auto mp = std::make_unique<Botan::BigInt>();	156✔
31	return ffi_new_object(mp_out, std::move(mp));	156✔
32	});	156✔
33	}
34
35	int botan_mp_clear(botan_mp_t mp) {	×
36	return BOTAN_FFI_VISIT(mp, [](auto& bn) { bn.clear(); });	×
37	}
38
39	int botan_mp_set_from_int(botan_mp_t mp, int initial_value) {	2✔
40	return BOTAN_FFI_VISIT(mp, [=](auto& bn) { bn = Botan::BigInt::from_s32(initial_value); });	4✔
41	}
42
43	int botan_mp_set_from_str(botan_mp_t mp, const char* str) {	41✔
44	if(str == nullptr) {	41✔
45	return BOTAN_FFI_ERROR_NULL_POINTER;
46	}
47
48	return BOTAN_FFI_VISIT(mp, [=](auto& bn) { bn = Botan::BigInt(str); });	82✔
49	}
50
51	int botan_mp_set_from_radix_str(botan_mp_t mp, const char* str, size_t radix) {	12✔
52	if(str == nullptr) {	12✔
53	return BOTAN_FFI_ERROR_NULL_POINTER;
54	}
55
56	return BOTAN_FFI_VISIT(mp, [=](auto& bn) {	24✔
57	if(radix != 10 && radix != 16) {
58	return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
59	}
60
61	bn = Botan::BigInt::from_radix_digits(std::string_view(str), radix);
62	return BOTAN_FFI_SUCCESS;
63	});
64	}
65
66	// NOLINTBEGIN(misc-misplaced-const)
67
68	int botan_mp_set_from_mp(botan_mp_t dest, const botan_mp_t source) {	4✔
69	return BOTAN_FFI_VISIT(dest, [=](auto& bn) { bn = safe_get(source); });	8✔
70	}
71
72	int botan_mp_is_negative(const botan_mp_t mp) {	10✔
73	return BOTAN_FFI_VISIT(mp, [](const auto& bn) { return bn.signum() < 0 ? 1 : 0; });	20✔
74	}
75
76	int botan_mp_is_positive(const botan_mp_t mp) {	6✔
77	return BOTAN_FFI_VISIT(mp, [](const auto& bn) { return bn.signum() >= 0 ? 1 : 0; });	12✔
78	}
79
80	int botan_mp_flip_sign(botan_mp_t mp) {	5✔
81	return BOTAN_FFI_VISIT(mp, [](auto& bn) { bn.flip_sign(); });	15✔
82	}
83
84	int botan_mp_from_bin(botan_mp_t mp, const uint8_t bin[], size_t bin_len) {	1✔
85	if(bin_len > 0 && bin == nullptr) {	1✔
86	return BOTAN_FFI_ERROR_NULL_POINTER;
87	}
88	return BOTAN_FFI_VISIT(mp, [=](auto& bn) { bn._assign_from_bytes({bin, bin_len}); });	2✔
89	}
90
91	int botan_mp_to_hex(const botan_mp_t mp, char* out) {	3✔
92	if(out == nullptr) {	3✔
93	return BOTAN_FFI_ERROR_NULL_POINTER;
94	}
95	return BOTAN_FFI_VISIT(mp, [=](const auto& bn) {	6✔
96	const std::string hex = bn.to_hex_string();
97
98	// Check that we are about to write no more than the documented upper bound
99	const size_t upper_bound = 2 * bn.bytes() + 5;
100	BOTAN_ASSERT_NOMSG(hex.size() + 1 <= upper_bound);
101	std::memcpy(out, hex.c_str(), 1 + hex.size());
102	});
103	}
104
105	int botan_mp_view_hex(const botan_mp_t mp, botan_view_ctx ctx, botan_view_str_fn view) {	36✔
106	return BOTAN_FFI_VISIT(mp, [=](const auto& bn) -> int {	108✔
107	const std::string hex = bn.to_hex_string();
108	return invoke_view_callback(view, ctx, hex);
109	});
110	}
111
112	int botan_mp_to_str(const botan_mp_t mp, uint8_t radix, char* out, size_t* out_len) {	14✔
113	return BOTAN_FFI_VISIT(mp, [=](const auto& bn) -> int {	28✔
114	if(radix == 0 \|\| radix == 10) {
115	return write_str_output(out, out_len, bn.to_dec_string());
116	} else if(radix == 16) {
117	return write_str_output(out, out_len, bn.to_hex_string());
118	} else {
119	return BOTAN_FFI_ERROR_BAD_PARAMETER;
120	}
121	});
122	}
123
124	int botan_mp_view_str(const botan_mp_t mp, uint8_t radix, botan_view_ctx ctx, botan_view_str_fn view) {	3✔
125	return BOTAN_FFI_VISIT(mp, [=](const auto& bn) -> int {	9✔
126	if(radix == 10) {
127	return invoke_view_callback(view, ctx, bn.to_dec_string());
128	} else if(radix == 16) {
129	return invoke_view_callback(view, ctx, bn.to_hex_string());
130	} else {
131	return BOTAN_FFI_ERROR_BAD_PARAMETER;
132	}
133	});
134	}
135
136	int botan_mp_to_bin(const botan_mp_t mp, uint8_t vec[]) {	3✔
137	if(vec == nullptr) {	3✔
138	return BOTAN_FFI_ERROR_NULL_POINTER;
139	}
140	return BOTAN_FFI_VISIT(mp, [=](const auto& bn) { bn.serialize_to(std::span{vec, bn.bytes()}); });	6✔
141	}
142
143	int botan_mp_view_bin(const botan_mp_t mp, botan_view_ctx ctx, botan_view_bin_fn view) {	3✔
144	return BOTAN_FFI_VISIT(mp, [=](const auto& bn) {	15✔
145	const auto bytes = bn.serialize();
146	return invoke_view_callback(view, ctx, bytes);
147	});
148	}
149
150	int botan_mp_to_uint32(const botan_mp_t mp, uint32_t* val) {	5✔
151	if(val == nullptr) {	5✔
152	return BOTAN_FFI_ERROR_NULL_POINTER;
153	}
154	return BOTAN_FFI_VISIT(mp, [=](const auto& bn) { *val = bn.to_u32bit(); });	10✔
155	}
156
157	int botan_mp_destroy(botan_mp_t mp) {	190✔
158	return BOTAN_FFI_CHECKED_DELETE(mp);	190✔
159	}
160
161	int botan_mp_add(botan_mp_t result, const botan_mp_t x, const botan_mp_t y) {	5✔
162	return BOTAN_FFI_VISIT(result, [=](auto& res) {	10✔
163	if(result == x) {
164	res += safe_get(y);
165	} else {
166	res = safe_get(x) + safe_get(y);
167	}
168	});
169	}
170
171	int botan_mp_sub(botan_mp_t result, const botan_mp_t x, const botan_mp_t y) {	2✔
172	return BOTAN_FFI_VISIT(result, [=](auto& res) {	4✔
173	if(result == x) {
174	res -= safe_get(y);
175	} else {
176	res = safe_get(x) - safe_get(y);
177	}
178	});
179	}
180
181	int botan_mp_add_u32(botan_mp_t result, const botan_mp_t x, uint32_t y) {	2✔
182	return BOTAN_FFI_VISIT(result, [=](auto& res) {	4✔
183	if(result == x) {
184	res += static_cast<Botan::word>(y);
185	} else {
186	res = safe_get(x) + static_cast<Botan::word>(y);
187	}
188	});
189	}
190
191	int botan_mp_sub_u32(botan_mp_t result, const botan_mp_t x, uint32_t y) {	2✔
192	return BOTAN_FFI_VISIT(result, [=](auto& res) {	4✔
193	if(result == x) {
194	res -= static_cast<Botan::word>(y);
195	} else {
196	res = safe_get(x) - static_cast<Botan::word>(y);
197	}
198	});
199	}
200
201	int botan_mp_mul(botan_mp_t result, const botan_mp_t x, const botan_mp_t y) {	6✔
202	return BOTAN_FFI_VISIT(result, [=](auto& res) {	12✔
203	if(result == x) {
204	res *= safe_get(y);
205	} else {
206	res = safe_get(x) * safe_get(y);
207	}
208	});
209	}
210
211	int botan_mp_div(botan_mp_t quotient, botan_mp_t remainder, const botan_mp_t x, const botan_mp_t y) {	2✔
212	return BOTAN_FFI_VISIT(quotient, [=](auto& q) {	4✔
213	Botan::BigInt r;
214	Botan::vartime_divide(safe_get(x), safe_get(y), q, r);
215	safe_get(remainder) = r;
216	});
217	}
218
219	int botan_mp_equal(const botan_mp_t x_w, const botan_mp_t y_w) {	25✔
220	return BOTAN_FFI_VISIT(x_w, [=](const auto& x) -> int { return x == safe_get(y_w); });	50✔
221	}
222
223	int botan_mp_is_zero(const botan_mp_t mp) {	3✔
224	return BOTAN_FFI_VISIT(mp, [](const auto& bn) -> int { return bn.is_zero(); });	6✔
225	}
226
227	int botan_mp_is_odd(const botan_mp_t mp) {	2✔
228	return BOTAN_FFI_VISIT(mp, [](const auto& bn) -> int { return bn.is_odd(); });	5✔
229	}
230
231	int botan_mp_is_even(const botan_mp_t mp) {	2✔
232	return BOTAN_FFI_VISIT(mp, [](const auto& bn) -> int { return bn.is_even(); });	5✔
233	}
234
235	int botan_mp_cmp(int* result, const botan_mp_t x_w, const botan_mp_t y_w) {	46✔
236	if(result == nullptr) {	46✔
237	return BOTAN_FFI_ERROR_NULL_POINTER;
238	}
239	return BOTAN_FFI_VISIT(x_w, [=](auto& x) { *result = x.cmp(safe_get(y_w)); });	92✔
240	}
241
242	int botan_mp_swap(botan_mp_t x_w, botan_mp_t y_w) {	×
243	return BOTAN_FFI_VISIT(x_w, [=](auto& x) { x.swap(safe_get(y_w)); });	×
244	}
245
246	// Return (base^exponent) % modulus
247	int botan_mp_powmod(botan_mp_t out, const botan_mp_t base, const botan_mp_t exponent, const botan_mp_t modulus) {	2✔
248	return BOTAN_FFI_VISIT(	4✔
249	out, [=](auto& o) { o = Botan::power_mod(safe_get(base), safe_get(exponent), safe_get(modulus)); });
250	}
251
252	int botan_mp_lshift(botan_mp_t out, const botan_mp_t in, size_t shift) {	3✔
253	return BOTAN_FFI_VISIT(out, [=](auto& o) { o = safe_get(in) << shift; });	6✔
254	}
255
256	int botan_mp_rshift(botan_mp_t out, const botan_mp_t in, size_t shift) {	4✔
257	return BOTAN_FFI_VISIT(out, [=](auto& o) { o = safe_get(in) >> shift; });	8✔
258	}
259
260	int botan_mp_mod_inverse(botan_mp_t out, const botan_mp_t in, const botan_mp_t modulus) {	2✔
261	return BOTAN_FFI_VISIT(out, [=](auto& o) {	4✔
262	o = Botan::inverse_mod_general(safe_get(in), safe_get(modulus)).value_or(Botan::BigInt::zero());
263	});
264	}
265
266	int botan_mp_mod_mul(botan_mp_t out, const botan_mp_t x, const botan_mp_t y, const botan_mp_t modulus) {	2✔
267	return BOTAN_FFI_VISIT(out, [=](auto& o) {	6✔
268	auto reducer = Botan::Barrett_Reduction::for_secret_modulus(safe_get(modulus));
269	o = reducer.multiply(safe_get(x), safe_get(y));
270	});
271	}
272
273	int botan_mp_rand_bits(botan_mp_t rand_out, botan_rng_t rng, size_t bits) {	2✔
274	return BOTAN_FFI_VISIT(rng, [=](auto& r) { safe_get(rand_out).randomize(r, bits); });	4✔
275	}
276
277	int botan_mp_rand_range(botan_mp_t rand_out, botan_rng_t rng, const botan_mp_t lower, const botan_mp_t upper) {	10✔
278	return BOTAN_FFI_VISIT(	30✔
279	rng, [=](auto& r) { safe_get(rand_out) = Botan::BigInt::random_integer(r, safe_get(lower), safe_get(upper)); });
280	}
281
282	int botan_mp_gcd(botan_mp_t out, const botan_mp_t x, const botan_mp_t y) {	4✔
283	return BOTAN_FFI_VISIT(out, [=](auto& o) { o = Botan::gcd(safe_get(x), safe_get(y)); });	8✔
284	}
285
286	int botan_mp_is_prime(const botan_mp_t mp, botan_rng_t rng, size_t test_prob) {	5✔
287	return BOTAN_FFI_VISIT(mp, [=](const auto& n) { return (Botan::is_prime(n, safe_get(rng), test_prob)) ? 1 : 0; });	10✔
288	}
289
290	int botan_mp_get_bit(const botan_mp_t mp, size_t bit) {	6✔
291	return BOTAN_FFI_VISIT(mp, [=](const auto& n) -> int { return n.get_bit(bit); });	12✔
292	}
293
294	int botan_mp_set_bit(botan_mp_t mp, size_t bit) {	2✔
295	return BOTAN_FFI_VISIT(mp, [=](auto& n) { n.set_bit(bit); });	4✔
296	}
297
298	int botan_mp_clear_bit(botan_mp_t mp, size_t bit) {	2✔
299	return BOTAN_FFI_VISIT(mp, [=](auto& n) { n.clear_bit(bit); });	4✔
300	}
301
302	int botan_mp_num_bits(const botan_mp_t mp, size_t* bits) {	7✔
303	if(bits == nullptr) {	7✔
304	return BOTAN_FFI_ERROR_NULL_POINTER;
305	}
306	return BOTAN_FFI_VISIT(mp, [=](const auto& n) { *bits = n.bits(); });	14✔
307	}
308
309	int botan_mp_num_bytes(const botan_mp_t mp, size_t* bytes) {	10✔
310	if(bytes == nullptr) {	10✔
311	return BOTAN_FFI_ERROR_NULL_POINTER;
312	}
313	return BOTAN_FFI_VISIT(mp, [=](const auto& n) { *bytes = n.bytes(); });	20✔
314	}
315
316	// NOLINTEND(misc-misplaced-const)
317	}

randombit / botan / 26864473078

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