86 lines
2.1 KiB
C++
86 lines
2.1 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2015 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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class mtpPublicRSA {
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public:
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mtpPublicRSA(const char *key) : data(new mtpPublicRSAInner(PEM_read_bio_RSAPublicKey(BIO_new_mem_buf(const_cast<char*>(key), -1), 0, 0, 0), 0)) {
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if (!data->prsa) return;
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int32 nBytes = BN_num_bytes(data->prsa->n);
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int32 eBytes = BN_num_bytes(data->prsa->e);
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string nStr(nBytes, 0), eStr(eBytes, 0);
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BN_bn2bin(data->prsa->n, (uchar*)&nStr[0]);
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BN_bn2bin(data->prsa->e, (uchar*)&eStr[0]);
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mtpBuffer tmp;
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MTP_string(nStr).write(tmp);
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MTP_string(eStr).write(tmp);
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uchar sha1Buffer[20];
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data->fp = *(uint64*)(hashSha1(&tmp[0], tmp.size() * sizeof(mtpPrime), sha1Buffer) + 3);
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}
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mtpPublicRSA(const mtpPublicRSA &v) : data(v.data) {
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++data->cnt;
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}
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mtpPublicRSA &operator=(const mtpPublicRSA &v) {
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if (data != v.data) {
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destroy();
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data = v.data;
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++data->cnt;
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}
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return *this;
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}
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uint64 fingerPrint() const {
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return data->fp;
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}
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RSA *key() {
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return data->prsa;
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}
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~mtpPublicRSA() {
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destroy();
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}
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private:
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void destroy() {
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if (!--data->cnt) {
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delete data;
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}
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}
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struct mtpPublicRSAInner {
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mtpPublicRSAInner(RSA *_prsa, uint64 _fp) : prsa(_prsa), cnt(1), fp(_fp) {
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}
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~mtpPublicRSAInner() {
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RSA_free(prsa);
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}
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RSA *prsa;
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uint32 cnt;
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uint64 fp;
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};
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mtpPublicRSAInner *data;
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};
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