47 lines
750 B
C
47 lines
750 B
C
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#include <string.h>
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#include "randombytes.h"
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#include "crypto_sign.h"
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#include "crypto_hash_sha512.h"
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#include "ge.h"
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int crypto_sign_seckey_expand(unsigned char *sk,const unsigned char *seed)
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{
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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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return 0;
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}
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int crypto_sign_seckey(unsigned char *sk)
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{
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unsigned char seed[32];
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if (randombytes(seed,32) < 0)
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return -1;
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crypto_sign_seckey_expand(sk,seed);
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return 0;
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}
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int crypto_sign_pubkey(unsigned char *pk,const unsigned char *sk)
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{
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ge_p3 A;
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ge_scalarmult_base(&A,sk);
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ge_p3_tobytes(pk,&A);
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return 0;
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}
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int crypto_sign_keypair(unsigned char *pk,unsigned char *sk)
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{
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crypto_sign_seckey(sk);
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crypto_sign_pubkey(pk,sk);
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return 0;
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}
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