blob: 7d6f3403f44a71145999eeaae42d3e005f89fc79 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <hash.h>
#include <key.h>
#include <key_io.h>
#include <pubkey.h>
#include <script/standard.h>
#include <uint256.h>
#include <util/message.h>
#include <util/strencodings.h>
#include <cassert>
#include <optional>
#include <string>
#include <variant>
#include <vector>
/**
* Text used to signify that a signed message follows and to prevent
* inadvertently signing a transaction.
*/
const std::string MESSAGE_MAGIC = "Bitcoin Signed Message:\n";
MessageVerificationResult MessageVerify(
const std::string& address,
const std::string& signature,
const std::string& message)
{
CTxDestination destination = DecodeDestination(address);
if (!IsValidDestination(destination)) {
return MessageVerificationResult::ERR_INVALID_ADDRESS;
}
if (std::get_if<PKHash>(&destination) == nullptr) {
return MessageVerificationResult::ERR_ADDRESS_NO_KEY;
}
auto signature_bytes = DecodeBase64(signature);
if (!signature_bytes) {
return MessageVerificationResult::ERR_MALFORMED_SIGNATURE;
}
CPubKey pubkey;
if (!pubkey.RecoverCompact(MessageHash(message), *signature_bytes)) {
return MessageVerificationResult::ERR_PUBKEY_NOT_RECOVERED;
}
if (!(CTxDestination(PKHash(pubkey)) == destination)) {
return MessageVerificationResult::ERR_NOT_SIGNED;
}
return MessageVerificationResult::OK;
}
bool MessageSign(
const CKey& privkey,
const std::string& message,
std::string& signature)
{
std::vector<unsigned char> signature_bytes;
if (!privkey.SignCompact(MessageHash(message), signature_bytes)) {
return false;
}
signature = EncodeBase64(signature_bytes);
return true;
}
uint256 MessageHash(const std::string& message)
{
HashWriter hasher{};
hasher << MESSAGE_MAGIC << message;
return hasher.GetHash();
}
std::string SigningResultString(const SigningResult res)
{
switch (res) {
case SigningResult::OK:
return "No error";
case SigningResult::PRIVATE_KEY_NOT_AVAILABLE:
return "Private key not available";
case SigningResult::SIGNING_FAILED:
return "Sign failed";
// no default case, so the compiler can warn about missing cases
}
assert(false);
}
|
