release/src/router/libsodium/src/libsodium/crypto_sign/ed25519/ref10/keypair.c

   1 #include "api.h"
   2 #include "randombytes.h"
   3 #include "crypto_hash_sha512.h"
   4 #include "ge.h"
   5
   6 int crypto_sign_seed_keypair(unsigned char *pk, unsigned char *sk,
   7                              const unsigned char *seed)
   8 {
   9     ge_p3 A;
  10     int i;
  11
  12     crypto_hash_sha512(sk,seed,32);
  13     sk[0] &= 248;
  14     sk[31] &= 63;
  15     sk[31] |= 64;
  16
  17     ge_scalarmult_base(&A,sk);
  18     ge_p3_tobytes(pk,&A);
  19
  20     for (i = 0;i < 32;++i) sk[i] = seed[i];
  21     for (i = 0;i < 32;++i) sk[32 + i] = pk[i];
  22     return 0;
  23 }
  24
  25 int crypto_sign_keypair(unsigned char *pk, unsigned char *sk)
  26 {
  27     unsigned char seed[32];
  28
  29     randombytes(seed,32);
  30     return crypto_sign_seed_keypair(pk,sk,seed);
  31 }