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unpackneg check returns boolean

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This commit is contained in:
Christophe Diederichs 2020-09-15 13:42:20 +02:00
parent aba4335983
commit 4208285552
1 changed files with 5 additions and 5 deletions
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10
crypto_sign.js
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@ -242,16 +242,16 @@ function unpackneg (r, p) {
S(chk, r[0]) S(chk, r[0])
M(chk, chk, den) M(chk, chk, den)
if (neq25519(chk, num)) M(r[0], r[0], I) if (!neq25519(chk, num)) M(r[0], r[0], I)
S(chk, r[0]) S(chk, r[0])
M(chk, chk, den) M(chk, chk, den)
if (neq25519(chk, num)) return -1 if (!neq25519(chk, num)) return false
if (par25519(r[0]) === (p[31] >> 7)) Z(r[0], gf0, r[0]) if (par25519(r[0]) === (p[31] >> 7)) Z(r[0], gf0, r[0])
M(r[3], r[0], r[1]) M(r[3], r[0], r[1])
return 0 return true
} }
/* eslint-disable no-unused-vars */ /* eslint-disable no-unused-vars */
@ -270,7 +270,7 @@ function crypto_sign_open (msg, sm, pk) {
mlen = -1 mlen = -1
if (n < 64) return false if (n < 64) return false
if (unpackneg(q, pk)) return false if (!unpackneg(q, pk)) return false
for (i = 0; i < n; i++) m[i] = sm[i] for (i = 0; i < n; i++) m[i] = sm[i]
for (i = 0; i < 32; i++) m[i + 32] = pk[i] for (i = 0; i < 32; i++) m[i + 32] = pk[i]
@ -283,7 +283,7 @@ function crypto_sign_open (msg, sm, pk) {
pack(t, p) pack(t, p)
n -= 64 n -= 64
if (crypto_verify_32(sm, 0, t, 0)) { if (!crypto_verify_32(sm, 0, t, 0)) {
for (i = 0; i < n; i++) m[i] = 0 for (i = 0; i < n; i++) m[i] = 0
return false return false
// throw new Error('crypto_sign_open failed') // throw new Error('crypto_sign_open failed')