35 lines
732 B
C
35 lines
732 B
C
#include <string.h>
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#include "randombytes.h"
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#include "ed25519.h"
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#include "sha512.h"
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#include "ge.h"
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int ed25519_sign_seed_keypair(unsigned char *pk, unsigned char *sk,
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const unsigned char *seed)
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{
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ge_p3 A;
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crypto_hash_sha512(sk,seed,32);
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sk[0] &= 248;
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sk[31] &= 63;
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sk[31] |= 64;
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ge_scalarmult_base(&A,sk);
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ge_p3_tobytes(pk,&A);
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memmove(sk, seed, 32);
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memmove(sk + 32, pk, 32);
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return 0;
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}
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int ed25519_sign_keypair(unsigned char *pk, unsigned char *sk)
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{
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unsigned char seed[32];
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int ret;
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ed25519_randombytes(seed, sizeof seed);
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ret = ed25519_sign_seed_keypair(pk, sk, seed);
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memset(seed, 0, sizeof seed);
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return ret;
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}
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