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-rw-r--r--src/script/compressor.cpp130
-rw-r--r--src/script/compressor.h89
2 files changed, 0 insertions, 219 deletions
diff --git a/src/script/compressor.cpp b/src/script/compressor.cpp
deleted file mode 100644
index af1acf48db..0000000000
--- a/src/script/compressor.cpp
+++ /dev/null
@@ -1,130 +0,0 @@
-// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#include "compressor.h"
-
-#include "key.h"
-#include "script/standard.h"
-
-bool CScriptCompressor::IsToKeyID(CKeyID &hash) const
-{
- if (script.size() == 25 && script[0] == OP_DUP && script[1] == OP_HASH160
- && script[2] == 20 && script[23] == OP_EQUALVERIFY
- && script[24] == OP_CHECKSIG) {
- memcpy(&hash, &script[3], 20);
- return true;
- }
- return false;
-}
-
-bool CScriptCompressor::IsToScriptID(CScriptID &hash) const
-{
- if (script.size() == 23 && script[0] == OP_HASH160 && script[1] == 20
- && script[22] == OP_EQUAL) {
- memcpy(&hash, &script[2], 20);
- return true;
- }
- return false;
-}
-
-bool CScriptCompressor::IsToPubKey(CPubKey &pubkey) const
-{
- if (script.size() == 35 && script[0] == 33 && script[34] == OP_CHECKSIG
- && (script[1] == 0x02 || script[1] == 0x03)) {
- pubkey.Set(&script[1], &script[34]);
- return true;
- }
- if (script.size() == 67 && script[0] == 65 && script[66] == OP_CHECKSIG
- && script[1] == 0x04) {
- pubkey.Set(&script[1], &script[66]);
- return pubkey.IsFullyValid(); // if not fully valid, a case that would not be compressible
- }
- return false;
-}
-
-bool CScriptCompressor::Compress(std::vector<unsigned char> &out) const
-{
- CKeyID keyID;
- if (IsToKeyID(keyID)) {
- out.resize(21);
- out[0] = 0x00;
- memcpy(&out[1], &keyID, 20);
- return true;
- }
- CScriptID scriptID;
- if (IsToScriptID(scriptID)) {
- out.resize(21);
- out[0] = 0x01;
- memcpy(&out[1], &scriptID, 20);
- return true;
- }
- CPubKey pubkey;
- if (IsToPubKey(pubkey)) {
- out.resize(33);
- memcpy(&out[1], &pubkey[1], 32);
- if (pubkey[0] == 0x02 || pubkey[0] == 0x03) {
- out[0] = pubkey[0];
- return true;
- } else if (pubkey[0] == 0x04) {
- out[0] = 0x04 | (pubkey[64] & 0x01);
- return true;
- }
- }
- return false;
-}
-
-unsigned int CScriptCompressor::GetSpecialSize(unsigned int nSize) const
-{
- if (nSize == 0 || nSize == 1)
- return 20;
- if (nSize == 2 || nSize == 3 || nSize == 4 || nSize == 5)
- return 32;
- return 0;
-}
-
-bool CScriptCompressor::Decompress(unsigned int nSize, const std::vector<unsigned char> &in)
-{
- switch(nSize) {
- case 0x00:
- script.resize(25);
- script[0] = OP_DUP;
- script[1] = OP_HASH160;
- script[2] = 20;
- memcpy(&script[3], &in[0], 20);
- script[23] = OP_EQUALVERIFY;
- script[24] = OP_CHECKSIG;
- return true;
- case 0x01:
- script.resize(23);
- script[0] = OP_HASH160;
- script[1] = 20;
- memcpy(&script[2], &in[0], 20);
- script[22] = OP_EQUAL;
- return true;
- case 0x02:
- case 0x03:
- script.resize(35);
- script[0] = 33;
- script[1] = nSize;
- memcpy(&script[2], &in[0], 32);
- script[34] = OP_CHECKSIG;
- return true;
- case 0x04:
- case 0x05:
- unsigned char vch[33] = {};
- vch[0] = nSize - 2;
- memcpy(&vch[1], &in[0], 32);
- CPubKey pubkey(&vch[0], &vch[33]);
- if (!pubkey.Decompress())
- return false;
- assert(pubkey.size() == 65);
- script.resize(67);
- script[0] = 65;
- memcpy(&script[1], pubkey.begin(), 65);
- script[66] = OP_CHECKSIG;
- return true;
- }
- return false;
-}
diff --git a/src/script/compressor.h b/src/script/compressor.h
deleted file mode 100644
index 154e0b2662..0000000000
--- a/src/script/compressor.h
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#ifndef H_BITCOIN_SCRIPT_COMPRESSOR
-#define H_BITCOIN_SCRIPT_COMPRESSOR
-
-#include "script/script.h"
-#include "serialize.h"
-
-class CKeyID;
-class CPubKey;
-class CScriptID;
-
-/** Compact serializer for scripts.
- *
- * It detects common cases and encodes them much more efficiently.
- * 3 special cases are defined:
- * * Pay to pubkey hash (encoded as 21 bytes)
- * * Pay to script hash (encoded as 21 bytes)
- * * Pay to pubkey starting with 0x02, 0x03 or 0x04 (encoded as 33 bytes)
- *
- * Other scripts up to 121 bytes require 1 byte + script length. Above
- * that, scripts up to 16505 bytes require 2 bytes + script length.
- */
-class CScriptCompressor
-{
-private:
- // make this static for now (there are only 6 special scripts defined)
- // this can potentially be extended together with a new nVersion for
- // transactions, in which case this value becomes dependent on nVersion
- // and nHeight of the enclosing transaction.
- static const unsigned int nSpecialScripts = 6;
-
- CScript &script;
-protected:
- // These check for scripts for which a special case with a shorter encoding is defined.
- // They are implemented separately from the CScript test, as these test for exact byte
- // sequence correspondences, and are more strict. For example, IsToPubKey also verifies
- // whether the public key is valid (as invalid ones cannot be represented in compressed
- // form).
- bool IsToKeyID(CKeyID &hash) const;
- bool IsToScriptID(CScriptID &hash) const;
- bool IsToPubKey(CPubKey &pubkey) const;
-
- bool Compress(std::vector<unsigned char> &out) const;
- unsigned int GetSpecialSize(unsigned int nSize) const;
- bool Decompress(unsigned int nSize, const std::vector<unsigned char> &out);
-public:
- CScriptCompressor(CScript &scriptIn) : script(scriptIn) { }
-
- unsigned int GetSerializeSize(int nType, int nVersion) const {
- std::vector<unsigned char> compr;
- if (Compress(compr))
- return compr.size();
- unsigned int nSize = script.size() + nSpecialScripts;
- return script.size() + VARINT(nSize).GetSerializeSize(nType, nVersion);
- }
-
- template<typename Stream>
- void Serialize(Stream &s, int nType, int nVersion) const {
- std::vector<unsigned char> compr;
- if (Compress(compr)) {
- s << CFlatData(compr);
- return;
- }
- unsigned int nSize = script.size() + nSpecialScripts;
- s << VARINT(nSize);
- s << CFlatData(script);
- }
-
- template<typename Stream>
- void Unserialize(Stream &s, int nType, int nVersion) {
- unsigned int nSize = 0;
- s >> VARINT(nSize);
- if (nSize < nSpecialScripts) {
- std::vector<unsigned char> vch(GetSpecialSize(nSize), 0x00);
- s >> REF(CFlatData(vch));
- Decompress(nSize, vch);
- return;
- }
- nSize -= nSpecialScripts;
- script.resize(nSize);
- s >> REF(CFlatData(script));
- }
-};
-
-#endif // H_BITCOIN_SCRIPT_COMPRESSOR
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