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)11void fuzz(const uint8_t in[], size_t len) 12 { 13 if(len > 2*(521+7)/8) 14 return; 15 16 static const Botan::BigInt& prime = Botan::prime_p521(); 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_p521(input, ws); 28 29 FUZZER_ASSERT_EQUAL(ref, input); 30 } 31 } 32