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40 lines
860 B
C
40 lines
860 B
C
#include <string.h>
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#include "modq.h"
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#include "params.h"
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#include "r3.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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#if crypto_kem_PUBLICKEYBYTES != rq_encode_len
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#error "crypto_kem_PUBLICKEYBYTES must match rq_encode_len"
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#endif
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#if crypto_kem_SECRETKEYBYTES != rq_encode_len + 2 * small_encode_len
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#error "crypto_kem_SECRETKEYBYTES must match rq_encode_len + 2 * small_encode_len"
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#endif
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int crypto_kem_keypair_ax2(unsigned char *pk,unsigned char *sk)
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{
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small g[768];
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small grecip[768];
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small f[768];
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modq f3recip[768];
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modq h[768];
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do
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small_random(g);
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while (r3_recip(grecip,g) != 0);
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small_random_weightw(f);
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rq_recip3(f3recip,f);
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rq_mult(h,f3recip,g);
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rq_encode(pk,h);
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small_encode(sk,f);
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small_encode(sk + small_encode_len,grecip);
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memcpy(sk + 2 * small_encode_len,pk,rq_encode_len);
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return 0;
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}
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