24032704228

Committed 06 Apr 2026 12:58PM UTC coverage: 89.451% (-0.003%) from 89.454%

Build # 24032704228

Build Type

Pull #5521

github

Committed by

web-flow

Commit Message

Merge 17f437d7f into 417709dd7

Pull Request Pull Request #5521: Rollup of small fixes

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105882 of 118369 relevant lines covered (89.45%)

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95.96

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

randombit / botan / 24032704228

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