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rpc: check and throw specific pubkey parsing errors in HexToPubKey

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In the helper `HexToPubKey`, check for three different causes of legacy
public key parsing errors (in this order):

    - pubkey is not a hex string
    - pubkey doesn't have a valid length (33 or 65 bytes) [NEW]
    - pubkey is cryptographically invalid, i.e. not on curve
      (`IsFullyValid` check)

and throw a specific error message for each one. Note that the error
code is identical for all of them (-5), so this doesn't break RPC API
compatibility.

The helper is currently used for the RPCs `createmultisig` and
`addmultisigaddress`. The length checks can be removed from the
call-sites and error message checks in the functional tests are adapted.
This commit is contained in:
Sebastian Falbesoner
2023-08-24 15:20:55 +02:00
parent b2b2b1e9e4
commit 100e8a75bf
3 changed files with 8 additions and 9 deletions
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4
test/functional/rpc_rawtransaction.py
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@ -491,11 +491,11 @@ class RawTransactionsTest(BitcoinTestFramework):
addr2Obj = self.nodes[2].getaddressinfo(addr2)
# Tests for createmultisig and addmultisigaddress
assert_raises_rpc_error(-5, "Invalid public key", self.nodes[0].createmultisig, 1, ["01020304"])
assert_raises_rpc_error(-5, 'Pubkey "01020304" must have a length of either 33 or 65 bytes', self.nodes[0].createmultisig, 1, ["01020304"])
# createmultisig can only take public keys
self.nodes[0].createmultisig(2, [addr1Obj['pubkey'], addr2Obj['pubkey']])
# addmultisigaddress can take both pubkeys and addresses so long as they are in the wallet, which is tested here
assert_raises_rpc_error(-5, "Invalid public key", self.nodes[0].createmultisig, 2, [addr1Obj['pubkey'], addr1])
assert_raises_rpc_error(-5, f'Pubkey "{addr1}" must be a hex string', self.nodes[0].createmultisig, 2, [addr1Obj['pubkey'], addr1])
mSigObj = self.nodes[2].addmultisigaddress(2, [addr1Obj['pubkey'], addr1])['address']