mirror of
https://github.com/henrydcase/pqc.git
synced 2024-11-27 09:51:30 +00:00
72 lines
3.1 KiB
C
72 lines
3.1 KiB
C
|
#include "api.h"
|
||
|
|
#include "cpapke.h"
|
||
|
|
#include "fips202.h"
|
||
|
|
#include "params.h"
|
||
|
|
#include "randombytes.h"
|
||
|
|
#include "verify.h"
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
/*************************************************
|
||
|
|
* Name: crypto_kem_keypair
|
||
|
|
*
|
||
|
|
* Description: Generates public and private key
|
||
|
|
* for CCA secure NewHope key encapsulation
|
||
|
|
* mechanism
|
||
|
|
*
|
||
|
|
* Arguments: - unsigned char *pk: pointer to output public key (an already allocated array of CRYPTO_PUBLICKEYBYTES bytes)
|
||
|
|
* - unsigned char *sk: pointer to output private key (an already allocated array of CRYPTO_SECRETKEYBYTES bytes)
|
||
|
|
*
|
||
|
|
* Returns 0 (success)
|
||
|
|
**************************************************/
|
||
|
|
int PQCLEAN_NEWHOPE1024CPA_CLEAN_crypto_kem_keypair(unsigned char *pk, unsigned char *sk) {
|
||
|
|
PQCLEAN_NEWHOPE1024CPA_CLEAN_cpapke_keypair(pk, sk); /* First put the actual secret key into sk */
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*************************************************
|
||
|
|
* Name: crypto_kem_enc
|
||
|
|
*
|
||
|
|
* Description: Generates cipher text and shared
|
||
|
|
* secret for given public key
|
||
|
|
*
|
||
|
|
* Arguments: - unsigned char *ct: pointer to output cipher text (an already allocated array of CRYPTO_CIPHERTEXTBYTES bytes)
|
||
|
|
* - unsigned char *ss: pointer to output shared secret (an already allocated array of CRYPTO_BYTES bytes)
|
||
|
|
* - const unsigned char *pk: pointer to input public key (an already allocated array of CRYPTO_PUBLICKEYBYTES bytes)
|
||
|
|
*
|
||
|
|
* Returns 0 (success)
|
||
|
|
**************************************************/
|
||
|
|
int PQCLEAN_NEWHOPE1024CPA_CLEAN_crypto_kem_enc(unsigned char *ct, unsigned char *ss, const unsigned char *pk) {
|
||
|
|
unsigned char buf[2 * NEWHOPE_SYMBYTES];
|
||
|
|
|
||
|
|
randombytes(buf, NEWHOPE_SYMBYTES);
|
||
|
|
|
||
|
|
shake256(buf, 2 * NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES); /* Don't release system RNG output */
|
||
|
|
|
||
|
|
PQCLEAN_NEWHOPE1024CPA_CLEAN_cpapke_enc(ct, buf, pk, buf + NEWHOPE_SYMBYTES); /* coins are in buf+NEWHOPE_SYMBYTES */
|
||
|
|
|
||
|
|
shake256(ss, NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES); /* hash pre-k to ss */
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************
|
||
|
|
* Name: crypto_kem_dec
|
||
|
|
*
|
||
|
|
* Description: Generates shared secret for given
|
||
|
|
* cipher text and private key
|
||
|
|
*
|
||
|
|
* Arguments: - unsigned char *ss: pointer to output shared secret (an already allocated array of CRYPTO_BYTES bytes)
|
||
|
|
* - const unsigned char *ct: pointer to input cipher text (an already allocated array of CRYPTO_CIPHERTEXTBYTES bytes)
|
||
|
|
* - const unsigned char *sk: pointer to input private key (an already allocated array of CRYPTO_SECRETKEYBYTES bytes)
|
||
|
|
*
|
||
|
|
* Returns 0 (success)
|
||
|
|
**************************************************/
|
||
|
|
int PQCLEAN_NEWHOPE1024CPA_CLEAN_crypto_kem_dec(unsigned char *ss, const unsigned char *ct, const unsigned char *sk) {
|
||
|
|
PQCLEAN_NEWHOPE1024CPA_CLEAN_cpapke_dec(ss, ct, sk);
|
||
|
|
|
||
|
|
shake256(ss, NEWHOPE_SYMBYTES, ss, NEWHOPE_SYMBYTES); /* hash pre-k to ss */
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|