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Reintroduce crypto_sign_seed_keypair

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This commit is contained in:
Frank Denis 2013-04-19 19:13:57 +02:00
parent 83a3892209
commit a821eae055
1 changed files with 32 additions and 13 deletions
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45
src/libsodium/crypto_sign/ed25519/ref10/keypair.c
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@ -3,21 +3,40 @@
#include "crypto_hash_sha512.h"
#include "ge.h"
int crypto_sign_keypair(unsigned char *pk,unsigned char *sk)
int crypto_sign_seed_keypair(unsigned char *pk, unsigned char *sk,
const unsigned char *seed)
{
unsigned char h[64];
ge_p3 A;
int i;
ge_p3 A;
int i;
randombytes(sk,32);
crypto_hash_sha512(h,sk,32);
h[0] &= 248;
h[31] &= 63;
h[31] |= 64;
crypto_hash_sha512(sk,seed,32);
sk[0] &= 248;
sk[31] &= 63;
sk[31] |= 64;
ge_scalarmult_base(&A,h);
ge_p3_tobytes(pk,&A);
ge_scalarmult_base(&A,sk);
ge_p3_tobytes(pk,&A);
for (i = 0;i < 32;++i) sk[32 + i] = pk[i];
return 0;
for (i = 0;i < 32;++i) sk[i] = seed[i];
for (i = 0;i < 32;++i) sk[32 + i] = pk[i];
return 0;
}
int crypto_sign_keypair(unsigned char *pk, unsigned char *sk)
{
unsigned char h[64];
ge_p3 A;
int i;
randombytes(sk,32);
crypto_hash_sha512(h,sk,32);
h[0] &= 248;
h[31] &= 63;
h[31] |= 64;
ge_scalarmult_base(&A,h);
ge_p3_tobytes(pk,&A);
for (i = 0;i < 32;++i) sk[32 + i] = pk[i];
return 0;
}