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Fix 2 subscript[0] bugs in pubkey.cpp, and eliminate one extra size check

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This commit is contained in:
Jeremy Rubin 2017-02-19 13:27:10 -05:00
parent e0451e3e2a
commit 500710bd29
1 changed files with 2 additions and 5 deletions
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7
src/pubkey.cpp
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@ -172,10 +172,7 @@ bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchS
if (!secp256k1_ec_pubkey_parse(secp256k1_context_verify, &pubkey, &(*this)[0], size())) {
return false;
}
if (vchSig.size() == 0) {
return false;
}
if (!ecdsa_signature_parse_der_lax(secp256k1_context_verify, &sig, &vchSig[0], vchSig.size())) {
if (!ecdsa_signature_parse_der_lax(secp256k1_context_verify, &sig, vchSig.data(), vchSig.size())) {
return false;
}
/* libsecp256k1's ECDSA verification requires lower-S signatures, which have
@ -274,7 +271,7 @@ bool CExtPubKey::Derive(CExtPubKey &out, unsigned int _nChild) const {
/* static */ bool CPubKey::CheckLowS(const std::vector<unsigned char>& vchSig) {
secp256k1_ecdsa_signature sig;
if (!ecdsa_signature_parse_der_lax(secp256k1_context_verify, &sig, &vchSig[0], vchSig.size())) {
if (!ecdsa_signature_parse_der_lax(secp256k1_context_verify, &sig, vchSig.data(), vchSig.size())) {
return false;
}
return (!secp256k1_ecdsa_signature_normalize(secp256k1_context_verify, NULL, &sig));