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Merge #17275: pubkey: Assert CPubKey's ECCVerifyHandle precondition

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d8daa8f3711909223b117b8faa82daca87fc942d pubkey: Assert CPubKey's ECCVerifyHandle precondition (practicalswift)

Pull request description:

  Assert `CPubKey`'s `ECCVerifyHandle` precondition.

  This makes it more clear for fuzzing harness writers and others that `ECCVerifyHandle` is expected to be held when interacting with `CPubKey`.

  Related PR #17274.

ACKs for top commit:
  sipa:
    ACK d8daa8f3711909223b117b8faa82daca87fc942d

Tree-SHA512: 9e74086599799dc9b5c3fb8357445b662e5bf896d826af63d6d6b6ddb616612966f3bb5de3bd3ae0e692c47de85672f64b8ab6d3a1c45899dc25ba46990b5ec7
This commit is contained in:
MarcoFalke 2019-12-06 13:35:31 -05:00 committed by pasta
parent 8adf798623
commit 65bac012ff
1 changed files with 6 additions and 0 deletions
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6
src/pubkey.cpp
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@ -171,6 +171,7 @@ bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchS
return false;
secp256k1_pubkey pubkey;
secp256k1_ecdsa_signature sig;
assert(secp256k1_context_verify && "secp256k1_context_verify must be initialized to use CPubKey.");
if (!secp256k1_ec_pubkey_parse(secp256k1_context_verify, &pubkey, vch, size())) {
return false;
}
@ -190,6 +191,7 @@ bool CPubKey::RecoverCompact(const uint256 &hash, const std::vector<unsigned cha
bool fComp = ((vchSig[0] - 27) & 4) != 0;
secp256k1_pubkey pubkey;
secp256k1_ecdsa_recoverable_signature sig;
assert(secp256k1_context_verify && "secp256k1_context_verify must be initialized to use CPubKey.");
if (!secp256k1_ecdsa_recoverable_signature_parse_compact(secp256k1_context_verify, &sig, &vchSig[1], recid)) {
return false;
}
@ -207,6 +209,7 @@ bool CPubKey::IsFullyValid() const {
if (!IsValid())
return false;
secp256k1_pubkey pubkey;
assert(secp256k1_context_verify && "secp256k1_context_verify must be initialized to use CPubKey.");
return secp256k1_ec_pubkey_parse(secp256k1_context_verify, &pubkey, vch, size());
}
@ -214,6 +217,7 @@ bool CPubKey::Decompress() {
if (!IsValid())
return false;
secp256k1_pubkey pubkey;
assert(secp256k1_context_verify && "secp256k1_context_verify must be initialized to use CPubKey.");
if (!secp256k1_ec_pubkey_parse(secp256k1_context_verify, &pubkey, vch, size())) {
return false;
}
@ -232,6 +236,7 @@ bool CPubKey::Derive(CPubKey& pubkeyChild, ChainCode &ccChild, unsigned int nChi
BIP32Hash(cc, nChild, *begin(), begin()+1, out);
memcpy(ccChild.begin(), out+32, 32);
secp256k1_pubkey pubkey;
assert(secp256k1_context_verify && "secp256k1_context_verify must be initialized to use CPubKey.");
if (!secp256k1_ec_pubkey_parse(secp256k1_context_verify, &pubkey, vch, size())) {
return false;
}
@ -273,6 +278,7 @@ bool CExtPubKey::Derive(CExtPubKey &out, unsigned int _nChild) const {
/* static */ bool CPubKey::CheckLowS(const std::vector<unsigned char>& vchSig) {
secp256k1_ecdsa_signature sig;
assert(secp256k1_context_verify && "secp256k1_context_verify must be initialized to use CPubKey.");
if (!ecdsa_signature_parse_der_lax(secp256k1_context_verify, &sig, vchSig.data(), vchSig.size())) {
return false;
}