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rangeproof: check that points deserialize correctly when verifying rangeproof

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This commit is contained in:
Andrew Poelstra 2018-10-02 16:23:08 +00:00
parent cb786d6d1a
commit 65ffea43d5
1 changed files with 4 additions and 2 deletions
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6
src/modules/rangeproof/rangeproof_impl.h
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@ -609,8 +609,10 @@ SECP256K1_INLINE static int secp256k1_rangeproof_verify_impl(const secp256k1_ecm
}
for(i = 0; i < rings - 1; i++) {
secp256k1_fe fe;
secp256k1_fe_set_b32(&fe, &proof[offset]);
secp256k1_ge_set_xquad(&c, &fe);
if (!secp256k1_fe_set_b32(&fe, &proof[offset]) ||
!secp256k1_ge_set_xquad(&c, &fe)) {
return 0;
}
if (signs[i]) {
secp256k1_ge_neg(&c, &c);
}