From 774ff2757de2a32c57046cbdc8425c6c22759035 Mon Sep 17 00:00:00 2001 From: Timo Weingärtner Date: Fri, 28 Aug 2015 19:12:58 +0200 Subject: rename C++ header to .H --- rfc4251.H | 210 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 210 insertions(+) create mode 100644 rfc4251.H (limited to 'rfc4251.H') diff --git a/rfc4251.H b/rfc4251.H new file mode 100644 index 0000000..d9ac93e --- /dev/null +++ b/rfc4251.H @@ -0,0 +1,210 @@ +/* + * rfc4251.h -- implements types from RFC 4251, section 5 + * + * rfc4251byte byte + * rfc4251bool bool + * rfc4251uint32 uint32 + * rfc4251uint64 uint64 + * rfc4251string string, incl. mpint and name-list + * + * those structs contain the objects in their RFC 4251 representation, + * conversions are provided via constructors and cast operators + * + * Copyright (C) 2013-2014 Timo Weingärtner + * + * This file is part of ssh-agent-filter. + * + * ssh-agent-filter is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * ssh-agent-filter is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with ssh-agent-filter. If not, see . + */ + +#include +#include +#include +#include +#include +#include // ntohl() / htonl() +#include +#include + +struct rfc4251byte { + union { + uint8_t value; + char buf[1]; + }; + + rfc4251byte () = default; + explicit rfc4251byte (uint8_t v) : value(v) {} + inline explicit rfc4251byte (std::istream &); + + operator uint8_t () const { return value; } +}; + +inline std::istream & operator>> (std::istream & is, rfc4251byte & x) { + return is.read(x.buf, sizeof(x.buf)); +} + +inline std::ostream & operator<< (std::ostream & os, rfc4251byte const & x) { + return os.write(x.buf, sizeof(x.buf)); +} + +inline rfc4251byte::rfc4251byte (std::istream & is) { + is >> *this; +} + +struct rfc4251bool { + union { + bool value; + char buf[1]; + }; + + rfc4251bool () = default; + explicit rfc4251bool (uint8_t v) : value(v) {} + inline explicit rfc4251bool (std::istream &); + + operator uint8_t () const { return value; } +}; + +inline std::istream & operator>> (std::istream & is, rfc4251bool & x) { + return is.read(x.buf, sizeof(x.buf)); +} + +inline std::ostream & operator<< (std::ostream & os, rfc4251bool const & x) { + return os.write(x.buf, sizeof(x.buf)); +} + +inline rfc4251bool::rfc4251bool (std::istream & is) { + is >> *this; +} + +struct rfc4251uint32 { + union { + uint32_t value; + char buf[4]; + }; + + rfc4251uint32 () = default; + explicit rfc4251uint32 (uint32_t v) { value = htonl(v); } + inline explicit rfc4251uint32 (std::istream &); + + operator uint32_t () const { return ntohl(value); } +}; + +inline std::istream & operator>> (std::istream & is, rfc4251uint32 & x) { + return is.read(x.buf, sizeof(x.buf)); +} + +inline std::ostream & operator<< (std::ostream & os, rfc4251uint32 const & x) { + return os.write(x.buf, sizeof(x.buf)); +} + +inline rfc4251uint32::rfc4251uint32 (std::istream & is) { + is >> *this; +} + +struct rfc4251uint64 { + union { + uint64_t value; + char buf[8]; + }; + + rfc4251uint64 () = default; + inline explicit rfc4251uint64 (uint64_t v); + inline explicit rfc4251uint64 (std::istream &); + + inline explicit operator uint64_t () const; +}; + +inline rfc4251uint64::rfc4251uint64 (uint64_t v) { + for (int_fast8_t i{7}; i >= 0; --i) { + buf[i] = v & 0xff; + v >>= 8; + } +} + +inline rfc4251uint64::operator uint64_t () const { + uint64_t ret{0}; + for (uint_fast8_t i{0}; i < 8; ++i) { + ret <<= 8; + ret |= static_cast(buf[i]); + } + return ret; +} + +inline std::istream & operator>> (std::istream & is, rfc4251uint64 & x) { + return is.read(x.buf, sizeof(x.buf)); +} + +inline std::ostream & operator<< (std::ostream & os, rfc4251uint64 const & x) { + return os.write(x.buf, sizeof(x.buf)); +} + +inline rfc4251uint64::rfc4251uint64 (std::istream & is) { + is >> *this; +} + +struct rfc4251string : boost::totally_ordered { + std::vector value; + + rfc4251string () = default; + inline explicit rfc4251string (char const *, size_t); + explicit rfc4251string (std::string const & s) : rfc4251string{s.data(), s.size()} {} + explicit rfc4251string (std::vector const &); + explicit rfc4251string (mpz_srcptr); + explicit rfc4251string (mpz_class const & x) : rfc4251string{x.get_mpz_t()} {} + inline explicit rfc4251string (std::istream &); + + size_t size () const { return value.size(); } + char const * data () const { return value.data(); } + char * data () { return value.data(); } + + operator std::string () const { return {value.begin(), value.end()}; } + operator std::vector () const; + operator mpz_class () const; +}; + +inline rfc4251string::rfc4251string (char const * s, size_t l) { + if (l > std::numeric_limits::max()) + throw std::length_error{"32-bit limit for rfc4251string exceeded"}; + value.insert(value.end(), s, s + l); +} + +inline std::istream & operator>> (std::istream & is, rfc4251string & s) { + s.value.clear(); + rfc4251uint32 len; + if (is >> len) { + s.value.resize(len); + is.read(s.value.data(), len); + } + return is; +} + +inline std::ostream & operator<< (std::ostream & os, rfc4251string const & s) { + if (s.value.size() > std::numeric_limits::max()) + throw std::length_error{"32-bit limit for rfc4251string exceeded"}; + if (os << rfc4251uint32{static_cast(s.value.size())}) + os.write(s.value.data(), s.value.size()); + return os; +} + +inline rfc4251string::rfc4251string (std::istream & is) { + is >> *this; +} + +inline bool operator== (rfc4251string const & l, rfc4251string const & r) { + return l.value == r.value; +} + +inline bool operator< (rfc4251string const & l, rfc4251string const & r) { + return l.value < r.value; +} -- cgit v1.2.3