Merge #326: Replace Signature with Message Signature

2e4dac9 Replace Signature with Message Signature (Masud)

Pull request description:

  When attempting to use verify_message() function, using Singature kept leading to InvalidSignature.

  As such, we replaced Signature with MessageSignature from bitcoin::sign_message::MessageSignature.

  We also noticed that there was a // TODO comment to test verify_message, so we also added a test function and it works with the new MessageSignature.

ACKs for top commit:
  tcharding:
    ACK 2e4dac9

Tree-SHA512: d6279086c66f420009c5600e3d5028090c8df3a7088d2fbe928d94fc796dedf227b8536295bd231bf5ddc6ad306120685020c4cf6f4f0c631c3075d9ff9f0009

Author: tcharding

Diff for: client/src/client.rs

@@ -23,7 +23,7 @@ use serde_json;
 
 use crate::bitcoin::address::{NetworkUnchecked, NetworkChecked};
 use crate::bitcoin::hashes::hex::FromHex;
-use crate::bitcoin::secp256k1::ecdsa::Signature;
+use bitcoin::sign_message::MessageSignature;
 use crate::bitcoin::{
     Address, Amount, Block, OutPoint, PrivateKey, PublicKey, Script, Transaction,
 };
@@ -874,7 +874,7 @@ pub trait RpcApi: Sized {
     fn verify_message(
         &self,
         address: &Address,
-        signature: &Signature,
+        signature: &MessageSignature,
         message: &str,
     ) -> Result<bool> {
         let args = [address.to_string().into(), signature.to_string().into(), into_json(message)?];

Diff for: integration_test/Cargo.toml

@@ -6,6 +6,6 @@ edition = "2018"
 
 [dependencies]
 bitcoincore-rpc = { path = "../client" }
-bitcoin = { version = "0.31.0", features = ["serde", "rand"]}
+bitcoin = { version = "0.31.0", features = ["serde", "rand", "base64"]}
 lazy_static = "1.4.0"
 log = "0.4"

Diff for: integration_test/src/main.rs

@@ -26,6 +26,7 @@ use crate::json::BlockStatsFields as BsFields;
 use bitcoin::consensus::encode::{deserialize, serialize_hex};
 use bitcoin::hashes::hex::FromHex;
 use bitcoin::hashes::Hash;
+use bitcoin::sign_message::MessageSignature;
 use bitcoin::{secp256k1, ScriptBuf, sighash};
 use bitcoin::{
     transaction, Address, Amount, Network, OutPoint, PrivateKey, Sequence, SignedAmount,
@@ -146,6 +147,7 @@ fn main() {
     test_get_blockchain_info(&cl);
     test_get_new_address(&cl);
     test_get_raw_change_address(&cl);
+    test_verify_message_with_messagesignature(&cl);
     test_dump_private_key(&cl);
     test_generate(&cl);
     test_get_balance_generate_to_address(&cl);
@@ -216,7 +218,7 @@ fn main() {
     test_get_mempool_info(&cl);
     test_add_multisig_address(&cl);
     //TODO import_multi(
-    //TODO verify_message(
+
     //TODO encrypt_wallet(&self, passphrase: &str) -> Result<()> {
     //TODO get_by_id<T: queryable::Queryable<Self>>(
     test_add_node(&cl);
@@ -1368,6 +1370,16 @@ fn test_add_multisig_address(cl: &Client) {
     assert!(cl.add_multisig_address(addresses.len(), &addresses, None, Some(json::AddressType::Bech32)).is_ok());
 }
 
+fn test_verify_message_with_messagesignature(cl: &Client) {
+    let addr: Address = Address::from_str("mm68FdwbpxkVcqjU3fu7iiBGEwrsC6Hk66").unwrap().assume_checked();  
+    let signature = MessageSignature::from_base64(
+        "H3X+ic7axKtHGIsKiqDq0TmP9HIAkONwunln17ROlvB4SOVVUoG5e79EwAz94x2eERPwqcGJ5rLuWRhIu85pEwE=",)
+        .expect("a valid signature");
+    let message = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
+
+    assert!(cl.verify_message(&addr, &signature, message).expect("a valid signature")); 
+}
+
 #[rustfmt::skip]
 fn test_derive_addresses(cl: &Client) {
     let descriptor = r"pkh(02e96fe52ef0e22d2f131dd425ce1893073a3c6ad20e8cac36726393dfb4856a4c)#62k9sn4x";