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from_hash: clear the high bit

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Frank Denis 2019-05-03 18:40:48 +02:00
parent 10b991d518
commit 8a1ac8e11f
2 changed files with 1 additions and 2 deletions
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src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c
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@ -2623,7 +2623,6 @@ ge25519_from_hash(unsigned char s[32], const unsigned char h[64])
fe25519_frombytes(fe_f, fl); fe25519_frombytes(fe_f, fl);
fe25519_frombytes(fe_g, gl); fe25519_frombytes(fe_g, gl);
fe_f[0] += (h[0 + 31] >> 7) * 19; fe_f[0] += (h[0 + 31] >> 7) * 19;
fe_g[0] += (h[32 + 31] >> 7) * 19;
for (i = 0; i < sizeof (fe25519) / sizeof fe_f[0]; i++) { for (i = 0; i < sizeof (fe25519) / sizeof fe_f[0]; i++) {
fe_f[i] += 38 * fe_g[i]; fe_f[i] += 38 * fe_g[i];
} }