1 /*
2 * (C) 2015,2016 Jack Lloyd
3 *
4 * Botan is released under the Simplified BSD License (see license.txt)
5 */
6 
7 #include "fuzzers.h"
8 #include <botan/reducer.h>
9 #include <botan/curve_nistp.h>
10 
fuzz(const uint8_t in[],size_t len)11 void fuzz(const uint8_t in[], size_t len)
12    {
13    if(len > 2*224/8)
14       return;
15 
16    static const Botan::BigInt& prime = Botan::prime_p224();
17    static const Botan::BigInt prime_2 = prime * prime;
18    static Botan::Modular_Reducer prime_redc(prime);
19 
20    Botan::BigInt input = Botan::BigInt::decode(in, len);
21 
22    if(input < prime_2)
23       {
24       const Botan::BigInt ref = prime_redc.reduce(input);
25 
26       Botan::secure_vector<Botan::word> ws;
27       Botan::redc_p224(input, ws);
28 
29       FUZZER_ASSERT_EQUAL(ref, input);
30       }
31    }
32