mirror of
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50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
#include "kex.h"
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#include "fips202.h"
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#include "verify.h"
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void kyber_uake_initA(u8 *send, u8 *tk, u8 *sk, const u8 *pkb) {
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crypto_kem_keypair(send, sk);
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crypto_kem_enc(send + KYBER_PUBLICKEYBYTES, tk, pkb);
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}
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void kyber_uake_sharedB(u8 *send, u8 *k, const u8 *recv, const u8 *skb) {
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unsigned char buf[2 * KYBER_SYMBYTES];
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crypto_kem_enc(send, buf, recv);
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crypto_kem_dec(buf + KYBER_SYMBYTES, recv + KYBER_PUBLICKEYBYTES, skb);
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shake256(k, KYBER_SYMBYTES, buf, 2 * KYBER_SYMBYTES);
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}
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void kyber_uake_sharedA(u8 *k, const u8 *recv, const u8 *tk, const u8 *sk) {
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unsigned char buf[2 * KYBER_SYMBYTES];
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int i;
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crypto_kem_dec(buf, recv, sk);
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for (i = 0; i < KYBER_SYMBYTES; i++)
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buf[i + KYBER_SYMBYTES] = tk[i];
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shake256(k, KYBER_SYMBYTES, buf, 2 * KYBER_SYMBYTES);
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}
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void kyber_ake_initA(u8 *send, u8 *tk, u8 *sk, const u8 *pkb) {
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crypto_kem_keypair(send, sk);
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crypto_kem_enc(send + KYBER_PUBLICKEYBYTES, tk, pkb);
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}
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void kyber_ake_sharedB(u8 *send, u8 *k, const u8 *recv, const u8 *skb,
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const u8 *pka) {
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unsigned char buf[3 * KYBER_SYMBYTES];
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crypto_kem_enc(send, buf, recv);
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crypto_kem_enc(send + KYBER_CIPHERTEXTBYTES, buf + KYBER_SYMBYTES, pka);
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crypto_kem_dec(buf + 2 * KYBER_SYMBYTES, recv + KYBER_PUBLICKEYBYTES, skb);
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shake256(k, KYBER_SYMBYTES, buf, 3 * KYBER_SYMBYTES);
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}
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void kyber_ake_sharedA(u8 *k, const u8 *recv, const u8 *tk, const u8 *sk,
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const u8 *ska) {
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unsigned char buf[3 * KYBER_SYMBYTES];
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int i;
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crypto_kem_dec(buf, recv, sk);
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crypto_kem_dec(buf + KYBER_SYMBYTES, recv + KYBER_CIPHERTEXTBYTES, ska);
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for (i = 0; i < KYBER_SYMBYTES; i++)
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buf[i + 2 * KYBER_SYMBYTES] = tk[i];
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shake256(k, KYBER_SYMBYTES, buf, 3 * KYBER_SYMBYTES);
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}
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