mirror of https://github.com/PurpleI2P/i2pd
MXPLRS | Kirill
8 years ago
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GitHub
commit
b1612bb1ed
@ -0,0 +1,108 @@
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/*
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* Copyright (c) 2013-2016, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#include <inttypes.h>
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#include <string.h> /* memset */
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#include <iostream>
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#include "Gzip.h"
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namespace i2p {
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namespace data {
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const size_t GZIP_CHUNK_SIZE = 16384;
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GzipInflator::GzipInflator (): m_IsDirty (false)
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{
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memset (&m_Inflator, 0, sizeof (m_Inflator));
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inflateInit2 (&m_Inflator, MAX_WBITS + 16); // gzip
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}
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GzipInflator::~GzipInflator ()
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{
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inflateEnd (&m_Inflator);
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}
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size_t GzipInflator::Inflate (const uint8_t * in, size_t inLen, uint8_t * out, size_t outLen)
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{
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if (m_IsDirty) inflateReset (&m_Inflator);
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m_IsDirty = true;
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m_Inflator.next_in = const_cast<uint8_t *>(in);
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m_Inflator.avail_in = inLen;
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m_Inflator.next_out = out;
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m_Inflator.avail_out = outLen;
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int err;
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if ((err = inflate (&m_Inflator, Z_NO_FLUSH)) == Z_STREAM_END) {
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return outLen - m_Inflator.avail_out;
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}
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return 0;
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}
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void GzipInflator::Inflate (const uint8_t * in, size_t inLen, std::ostream& os)
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{
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m_IsDirty = true;
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uint8_t * out = new uint8_t[GZIP_CHUNK_SIZE];
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m_Inflator.next_in = const_cast<uint8_t *>(in);
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m_Inflator.avail_in = inLen;
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int ret;
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do {
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m_Inflator.next_out = out;
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m_Inflator.avail_out = GZIP_CHUNK_SIZE;
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ret = inflate (&m_Inflator, Z_NO_FLUSH);
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if (ret < 0) {
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inflateEnd (&m_Inflator);
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os.setstate(std::ios_base::failbit);
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break;
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}
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os.write ((char *)out, GZIP_CHUNK_SIZE - m_Inflator.avail_out);
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} while (!m_Inflator.avail_out); // more data to read
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delete[] out;
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}
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void GzipInflator::Inflate (std::istream& in, std::ostream& out)
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{
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uint8_t * buf = new uint8_t[GZIP_CHUNK_SIZE];
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while (!in.eof ())
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{
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in.read ((char *) buf, GZIP_CHUNK_SIZE);
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Inflate (buf, in.gcount (), out);
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}
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delete[] buf;
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}
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GzipDeflator::GzipDeflator (): m_IsDirty (false)
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{
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memset (&m_Deflator, 0, sizeof (m_Deflator));
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deflateInit2 (&m_Deflator, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 15 + 16, 8, Z_DEFAULT_STRATEGY); // 15 + 16 sets gzip
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}
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GzipDeflator::~GzipDeflator ()
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{
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deflateEnd (&m_Deflator);
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}
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void GzipDeflator::SetCompressionLevel (int level)
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{
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deflateParams (&m_Deflator, level, Z_DEFAULT_STRATEGY);
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}
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size_t GzipDeflator::Deflate (const uint8_t * in, size_t inLen, uint8_t * out, size_t outLen)
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{
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if (m_IsDirty) deflateReset (&m_Deflator);
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m_IsDirty = true;
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m_Deflator.next_in = const_cast<uint8_t *>(in);
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m_Deflator.avail_in = inLen;
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m_Deflator.next_out = out;
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m_Deflator.avail_out = outLen;
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int err;
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if ((err = deflate (&m_Deflator, Z_FINISH)) == Z_STREAM_END) {
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return outLen - m_Deflator.avail_out;
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} /* else */
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return 0;
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}
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} // data
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} // i2p
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@ -0,0 +1,44 @@
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#ifndef GZIP_H__
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#define GZIP_H__
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#include <zlib.h>
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namespace i2p {
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namespace data {
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class GzipInflator
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{
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public:
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GzipInflator ();
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~GzipInflator ();
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size_t Inflate (const uint8_t * in, size_t inLen, uint8_t * out, size_t outLen);
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/** @note @a os failbit will be set in case of error */
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void Inflate (const uint8_t * in, size_t inLen, std::ostream& os);
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void Inflate (std::istream& in, std::ostream& out);
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private:
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z_stream m_Inflator;
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bool m_IsDirty;
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};
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class GzipDeflator
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{
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public:
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GzipDeflator ();
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~GzipDeflator ();
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void SetCompressionLevel (int level);
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size_t Deflate (const uint8_t * in, size_t inLen, uint8_t * out, size_t outLen);
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private:
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z_stream m_Deflator;
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bool m_IsDirty;
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};
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} // data
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} // i2p
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#endif /* GZIP_H__ */
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@ -0,0 +1,90 @@
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/*
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* Copyright (c) 2013-2016, The PurpleI2P Project
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*
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* This file is part of Purple i2pd project and licensed under BSD3
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*
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* See full license text in LICENSE file at top of project tree
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*/
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#ifndef TAG_H__
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#define TAG_H__
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#include <string.h> /* memcpy */
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#include "Base.h"
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namespace i2p {
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namespace data {
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template<int sz>
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class Tag
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{
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public:
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Tag (const uint8_t * buf) { memcpy (m_Buf, buf, sz); };
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Tag (const Tag<sz>& ) = default;
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#ifndef _WIN32 // FIXME!!! msvs 2013 can't compile it
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Tag (Tag<sz>&& ) = default;
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#endif
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Tag () = default;
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Tag<sz>& operator= (const Tag<sz>& ) = default;
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#ifndef _WIN32
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Tag<sz>& operator= (Tag<sz>&& ) = default;
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#endif
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uint8_t * operator()() { return m_Buf; };
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const uint8_t * operator()() const { return m_Buf; };
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operator uint8_t * () { return m_Buf; };
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operator const uint8_t * () const { return m_Buf; };
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const uint64_t * GetLL () const { return ll; };
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bool operator== (const Tag<sz>& other) const { return !memcmp (m_Buf, other.m_Buf, sz); };
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bool operator< (const Tag<sz>& other) const { return memcmp (m_Buf, other.m_Buf, sz) < 0; };
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bool IsZero () const
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{
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for (int i = 0; i < sz/8; i++)
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if (ll[i]) return false;
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return true;
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}
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std::string ToBase64 () const
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{
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char str[sz*2];
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int l = i2p::data::ByteStreamToBase64 (m_Buf, sz, str, sz*2);
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str[l] = 0;
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return std::string (str);
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}
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std::string ToBase32 () const
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{
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char str[sz*2];
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int l = i2p::data::ByteStreamToBase32 (m_Buf, sz, str, sz*2);
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str[l] = 0;
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return std::string (str);
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}
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void FromBase32 (const std::string& s)
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{
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i2p::data::Base32ToByteStream (s.c_str (), s.length (), m_Buf, sz);
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}
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void FromBase64 (const std::string& s)
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{
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i2p::data::Base64ToByteStream (s.c_str (), s.length (), m_Buf, sz);
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}
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private:
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union // 8 bytes alignment
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{
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uint8_t m_Buf[sz];
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uint64_t ll[sz/8];
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};
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};
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} // data
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} // i2p
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#endif /* TAG_H__ */
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@ -0,0 +1,45 @@
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#include <cassert>
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#include <string.h>
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#include "../Base.h"
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using namespace i2p::data;
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int main() {
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const char *in = "test";
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size_t in_len = strlen(in);
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char out[16];
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/* bytes -> b64 */
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assert(ByteStreamToBase64(NULL, 0, NULL, 0) == 0);
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assert(ByteStreamToBase64(NULL, 0, out, sizeof(out)) == 0);
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assert(Base64EncodingBufferSize(2) == 4);
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assert(Base64EncodingBufferSize(4) == 8);
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assert(Base64EncodingBufferSize(6) == 8);
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assert(Base64EncodingBufferSize(7) == 12);
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assert(Base64EncodingBufferSize(9) == 12);
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assert(Base64EncodingBufferSize(10) == 16);
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assert(Base64EncodingBufferSize(12) == 16);
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assert(Base64EncodingBufferSize(13) == 20);
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assert(ByteStreamToBase64((uint8_t *) in, in_len, out, sizeof(out)) == 8);
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assert(memcmp(out, "dGVzdA==", 8) == 0);
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/* b64 -> bytes */
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assert(Base64ToByteStream(NULL, 0, NULL, 0) == 0);
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assert(Base64ToByteStream(NULL, 0, (uint8_t *) out, sizeof(out)) == 0);
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in = "dGVzdA=="; /* valid b64 */
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assert(Base64ToByteStream(in, strlen(in), (uint8_t *) out, sizeof(out)) == 4);
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assert(memcmp(out, "test", 4) == 0);
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in = "dGVzdA="; /* invalid b64 : not padded */
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assert(Base64ToByteStream(in, strlen(in), (uint8_t *) out, sizeof(out)) == 0);
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in = "dG/z.A=="; /* invalid b64 : char not from alphabet */
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// assert(Base64ToByteStream(in, strlen(in), (uint8_t *) out, sizeof(out)) == 0);
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// ^^^ fails, current implementation not checks acceptable symbols
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return 0;
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}
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