13210394651

Committed 08 Feb 2025 12:33AM UTC coverage: 91.656% (-0.006%) from 91.662%

Build # 13210394651

Build Type

push

github

Committed by

web-flow

Commit Message

Merge pull request #4642 from randombit/jack/target-info-header

Add internal target_info.h header

Run Details

94837 of 103471 relevant lines covered (91.66%)

11243945.63 hits per line

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94.74

/src/fuzzer/gcd.cpp

/*
* (C) 2021 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include "fuzzers.h"

#include <botan/numthry.h>

namespace {

Botan::BigInt ref_gcd(Botan::BigInt a, Botan::BigInt b) {
   Botan::BigInt t;
   while(b != 0) {
      t = a % b;
      t.swap(b);
      t.swap(a);
   }
   return a;
}

}  // namespace

void fuzz(std::span<const uint8_t> in) {
   static const size_t max_bits = 4096;

   if(2 * in.size() * 8 > max_bits) {
      return;
   }

   const Botan::BigInt x = Botan::BigInt::from_bytes(in.subspan(in.size() / 2));
   const Botan::BigInt y = Botan::BigInt::from_bytes(in.subspan(in.size() / 2, in.size() - (in.size() / 2)));

   const Botan::BigInt ref = ref_gcd(x, y);
   const Botan::BigInt lib = Botan::gcd(x, y);

   if(ref != lib) {
      FUZZER_WRITE_AND_CRASH("X = " << x.to_hex_string() << "\n"
                                    << "Y = " << y.to_hex_string() << "\n"
                                    << "L = " << lib.to_hex_string() << "\n"
                                    << "R = " << ref.to_hex_string() << "\n");
   }
}

1	/*
2	* (C) 2021 Jack Lloyd
3	*
4	* Botan is released under the Simplified BSD License (see license.txt)
5	*/
6
7	#include "fuzzers.h"
8
9	#include <botan/numthry.h>
10
11	namespace {
12
13	Botan::BigInt ref_gcd(Botan::BigInt a, Botan::BigInt b) {	257✔
14	Botan::BigInt t;	257✔
15	while(b != 0) {	513✔
16	t = a % b;	256✔
17	t.swap(b);	256✔
18	t.swap(a);	256✔
19	}
20	return a;	257✔
21	}	257✔
22
23	} // namespace
24
25	void fuzz(std::span<const uint8_t> in) {	1,000✔
26	static const size_t max_bits = 4096;	1,000✔
27
28	if(2 * in.size() * 8 > max_bits) {	1,000✔
29	return;	743✔
30	}
31
32	const Botan::BigInt x = Botan::BigInt::from_bytes(in.subspan(in.size() / 2));	257✔
33	const Botan::BigInt y = Botan::BigInt::from_bytes(in.subspan(in.size() / 2, in.size() - (in.size() / 2)));	257✔
34
35	const Botan::BigInt ref = ref_gcd(x, y);	257✔
36	const Botan::BigInt lib = Botan::gcd(x, y);	257✔
37
38	if(ref != lib) {	257✔
39	FUZZER_WRITE_AND_CRASH("X = " << x.to_hex_string() << "\n"	×
40	<< "Y = " << y.to_hex_string() << "\n"
41	<< "L = " << lib.to_hex_string() << "\n"
42	<< "R = " << ref.to_hex_string() << "\n");
43	}
44	}	257✔

randombit / botan / 13210394651

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