bitcoinaddressvalidator.cpp

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// Copyright (c) 2011-2014 The Bitcoin Core developers
// Copyright (c) 2017-2019 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#include <qt/bitcoinaddressvalidator.h>
 
#include <config.h>
#include <key_io.h>
 
/* Base58 characters are:
     "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
 
  This is:
  - All numbers except for '0'
  - All upper-case letters except for 'I' and 'O'
  - All lower-case letters except for 'l'
*/
BitcoinAddressEntryValidator::BitcoinAddressEntryValidator(
    const std::string &cashaddrprefixIn, QObject *parent)
    : QValidator(parent), cashaddrprefix(cashaddrprefixIn) {}
 
QValidator::State BitcoinAddressEntryValidator::validate(QString &input,
                                                         int &pos) const {
    Q_UNUSED(pos);
 
    // Empty address is "intermediate" input
    if (input.isEmpty()) {
        return QValidator::Intermediate;
    }
 
    // Correction
    for (int idx = 0; idx < input.size();) {
        bool removeChar = false;
        QChar ch = input.at(idx);
        // Corrections made are very conservative on purpose, to avoid
        // users unexpectedly getting away with typos that would normally
        // be detected, and thus sending to the wrong address.
        switch (ch.unicode()) {
            // Qt categorizes these as "Other_Format" not "Separator_Space"
            case 0x200B: // ZERO WIDTH SPACE
            case 0xFEFF: // ZERO WIDTH NO-BREAK SPACE
                removeChar = true;
                break;
            default:
                break;
        }
 
        // Remove whitespace
        if (ch.isSpace()) {
            removeChar = true;
        }
 
        // To next character
        if (removeChar) {
            input.remove(idx, 1);
        } else {
            ++idx;
        }
    }
 
    // Validation
    QValidator::State state = QValidator::Acceptable;
    for (int idx = 0; idx < input.size(); ++idx) {
        int ch = input.at(idx).unicode();
 
        if ((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'z') ||
            (ch >= 'A' && ch <= 'Z') || (ch == ':')) {
            // Alphanumeric and not a 'forbidden' character
            // We also include ':' for cashaddr.
        } else {
            return QValidator::Invalid;
        }
    }
 
    return state;
}
 
BitcoinAddressCheckValidator::BitcoinAddressCheckValidator(QObject *parent)
    : QValidator(parent) {}
 
QValidator::State BitcoinAddressCheckValidator::validate(QString &input,
                                                         int &pos) const {
    Q_UNUSED(pos);
 
    // Validate the passed Bitcoin address
    if (IsValidDestinationString(input.toStdString(),
                                 GetConfig().GetChainParams())) {
        return QValidator::Acceptable;
    }
 
    return QValidator::Invalid;
}