mirror of
https://github.com/RetroShare/RetroShare.git
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80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
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/****************************************************************
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* RetroShare is distributed under the following license:
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*
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* Copyright (C) 2012 Cyril Soler <csoler@users.sourceforge.net>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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****************************************************************/
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#pragma once
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// refer to RFC4880 specif document for loading GPG public keys:
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//
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// 11.1: transferable public keys
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// Global structure of transferable public keys
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//
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// - one public key packet (see 12.2)
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// - zero or more revocation signatures (See signature type 5.2.1 for key signature types)
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//
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// - user certification signatures (0x10 or 0x13)
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//
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// - 5.2.2: Signature format packet
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// - 5.2.3.1: signature subpacket specification
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//
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// - 4.3: packet tags (1 byte)
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#pragma once
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#include <stdint.h>
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#include <string>
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// This class handles GPG keys. For now we only clean them from signatures, but
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// in the future, we might cache them to avoid unnecessary calls to gpgme.
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//
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class PGPKeyManagement
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{
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public:
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// Create a minimal key, removing all signatures and third party info.
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// Input: a clean PGP certificate (starts with "----BEGIN",
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// ends with "-----END PGP PUBLIC KEY BLOCK-----"
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// Output: the same certificate without signatures.
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//
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// Returns:
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//
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// true if the certificate cleaning succeeded
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// false otherwise.
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//
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static bool createMinimalKey(const std::string& pgp_certificate,std::string& cleaned_certificate) ;
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private:
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// Computes the 24 bits CRC checksum necessary to all PGP data.
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//
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static uint32_t compute24bitsCRC(unsigned char *data,size_t len) ;
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};
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// This class handles the parsing of PGP packet headers under various (old and new) formats.
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//
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class PGPKeyParser
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{
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public:
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static uint64_t read_KeyID(unsigned char *& data) ;
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static uint32_t read_125Size(unsigned char *& data) ;
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static uint32_t read_partialBodyLength(unsigned char *& data) ;
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static void read_packetHeader(unsigned char *& data,uint8_t& packet_tag,uint32_t& packet_length) ;
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};
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