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pqcrypto/crypto_sign/dilithium2/clean/reduce.h
Matthias J. Kannwischer e56b2e5556
Add Dilithium (#172)
* fixes dynamic memory allocation test. previously a function called freeze() would trigger it

* this adds DilithiumII. Preprocessor conditionals still need to be removed

* fix ms Makefile

* fix MS compiler warnings

* clean-up

* remove preprocessor conditionals

* add dilithium3

* add dilithium4

* add duplicate consistency checks

* SHA2 state constants in common

* clean up symmetric.h

* Port SPHINCS+-SHA256 to sha256ctx struct

* Implement ctx struct for fips202

* Port Kyber{512,768,1024} to fips202 ctx struct

* Port NewHope to fips202 structs

* Port SPHINCS+-SHAKE256 to fips202 ctx structs

* Use opaque fips202 structs in MQDSS

* port dilithium to use fips202 ctx structs

* include -Wredundant-decls

* remove comment; format NTT constants

* reduce casts in power2round
2019-06-11 04:18:05 -05:00

22 lines
453 B
C

#ifndef REDUCE_H
#define REDUCE_H
#include <stdint.h>
#define MONT 4193792U // 2^32 % Q
#define QINV 4236238847U // -q^(-1) mod 2^32
/* a <= Q*2^32 => r < 2*Q */
uint32_t PQCLEAN_DILITHIUM2_CLEAN_montgomery_reduce(uint64_t a);
/* r < 2*Q */
uint32_t PQCLEAN_DILITHIUM2_CLEAN_reduce32(uint32_t a);
/* a < 2*Q => r < Q */
uint32_t PQCLEAN_DILITHIUM2_CLEAN_csubq(uint32_t a);
/* r < Q */
uint32_t PQCLEAN_DILITHIUM2_CLEAN_freeze(uint32_t a);
#endif