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38 lines
839 B
C
38 lines
839 B
C
#include <string.h>
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#include "modq.h"
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#include "params.h"
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#include "small.h"
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#include "rq.h"
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#include "crypto_kem.h"
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#include "randombytes.h"
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#include "crypto_stream_aes256ctr.h"
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#if crypto_kem_PUBLICKEYBYTES != rq_encoderounded_len + 32
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#error "crypto_kem_PUBLICKEYBYTES must match rq_encoderounded_len + 32"
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#endif
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#if crypto_kem_SECRETKEYBYTES != small_encode_len + crypto_kem_PUBLICKEYBYTES
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#error "crypto_kem_SECRETKEYBYTES must match small_encode_len + crypto_kem_PUBLICKEYBYTES"
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#endif
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int crypto_kem_keypair(unsigned char *pk,unsigned char *sk)
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{
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modq buf[768];
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#define G buf
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#define A buf
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small a[768];
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randombytes(pk,32);
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rq_fromseed(G,pk);
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small_random_weightw(a);
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rq_mult(A,G,a);
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rq_roundencode(pk + 32,A);
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small_encode(sk,a);
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memcpy(sk + small_encode_len,pk,crypto_kem_PUBLICKEYBYTES);
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return 0;
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}
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