126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
// Copyright (c) 2011-2014 The Bitcoin Core developers
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// Copyright (c) 2015-2017 The Bitcoin Unlimited developers
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// Copyright (c) 2017 The Bitcoin developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "bitcoinaddressvalidator.h"
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#include "cashaddr.h"
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#include "dstencode.h"
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/* Base58 characters are:
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"123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
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This is:
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- All numbers except for '0'
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- All upper-case letters except for 'I' and 'O'
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- All lower-case letters except for 'l'
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*/
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static bool ValidLegacyInput(const QString &input)
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{
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// Alphanumeric and not a 'forbidden' character
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for (QChar ch : input)
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{
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if (!(((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) && ch != 'l' &&
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ch != 'I' && ch != '0' && ch != 'O'))
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return false;
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}
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return true;
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}
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static bool ValidCashaddrInput(const QString &prefix, const QString &input)
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{
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std::vector<uint8_t> charset = cashaddr::EncodingCharset();
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// Input may be incomplete. We're checking if it so far looks good.
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for (int i = 0; i < input.size(); ++i)
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{
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char ch = std::tolower(input[i].toLatin1());
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// Does the input have the right prefix?
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if (i < prefix.size())
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{
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if (ch != prefix[i].toLatin1())
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{
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return false;
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}
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continue;
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}
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// Payload, must use cashaddr charset.
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if (std::find(begin(charset), end(charset), ch) == end(charset))
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{
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return false;
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}
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}
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return true;
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}
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BitcoinAddressEntryValidator::BitcoinAddressEntryValidator(const std::string &cashaddrprefix, QObject *parent)
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: QValidator(parent), cashaddrprefix(cashaddrprefix)
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{
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}
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QValidator::State BitcoinAddressEntryValidator::validate(QString &input, int &pos) const
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{
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Q_UNUSED(pos);
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// Empty address is "intermediate" input
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if (input.isEmpty())
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return QValidator::Intermediate;
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// Correction
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for (int idx = 0; idx < input.size();)
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{
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bool removeChar = false;
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QChar ch = input.at(idx);
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// Corrections made are very conservative on purpose, to avoid
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// users unexpectedly getting away with typos that would normally
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// be detected, and thus sending to the wrong address.
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switch(ch.unicode())
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{
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// Qt categorizes these as "Other_Format" not "Separator_Space"
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case 0x200B: // ZERO WIDTH SPACE
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case 0xFEFF: // ZERO WIDTH NO-BREAK SPACE
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removeChar = true;
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break;
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default:
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break;
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}
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// Remove whitespace
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if (ch.isSpace())
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removeChar = true;
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// To next character
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if (removeChar)
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input.remove(idx, 1);
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else
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++idx;
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}
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// Validation
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const QString cashPrefix = QString::fromStdString(cashaddrprefix) + ":";
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return (ValidLegacyInput(input) || ValidCashaddrInput(cashPrefix, input)) ? QValidator::Acceptable :
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QValidator::Invalid;
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}
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BitcoinAddressCheckValidator::BitcoinAddressCheckValidator(QObject *parent) :
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QValidator(parent)
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{
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}
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QValidator::State BitcoinAddressCheckValidator::validate(QString &input, int &pos) const
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{
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Q_UNUSED(pos);
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// Validate the passed Bitcoin address
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if (IsValidDestinationString(input.toStdString()))
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{
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return QValidator::Acceptable;
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}
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return QValidator::Invalid;
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}
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