From dfa23b94c24aae6466152fccbe896ba5dc0e97b4 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Wed, 1 May 2013 06:52:05 +0200
Subject: CSecret/CKey -> CKey/CPubKey split/refactor

---
 src/script.cpp | 33 ++++++++++++---------------------
 1 file changed, 12 insertions(+), 21 deletions(-)

(limited to 'src/script.cpp')

diff --git a/src/script.cpp b/src/script.cpp
index 7e1d5785e8..2c7fd59874 100644
--- a/src/script.cpp
+++ b/src/script.cpp
@@ -1100,11 +1100,7 @@ bool CheckSig(vector<unsigned char> vchSig, vector<unsigned char> vchPubKey, CSc
     if (signatureCache.Get(sighash, vchSig, vchPubKey))
         return true;
 
-    CKey key;
-    if (!key.SetPubKey(vchPubKey))
-        return false;
-
-    if (!key.Verify(sighash, vchSig))
+    if (!CPubKey(vchPubKey).Verify(sighash, vchSig))
         return false;
 
     if (!(flags & SCRIPT_VERIFY_NOCACHE))
@@ -1770,13 +1766,13 @@ void CScript::SetDestination(const CTxDestination& dest)
     boost::apply_visitor(CScriptVisitor(this), dest);
 }
 
-void CScript::SetMultisig(int nRequired, const std::vector<CKey>& keys)
+void CScript::SetMultisig(int nRequired, const std::vector<CPubKey>& keys)
 {
     this->clear();
 
     *this << EncodeOP_N(nRequired);
-    BOOST_FOREACH(const CKey& key, keys)
-        *this << key.GetPubKey();
+    BOOST_FOREACH(const CPubKey& key, keys)
+        *this << key;
     *this << EncodeOP_N(keys.size()) << OP_CHECKMULTISIG;
 }
 
@@ -1801,20 +1797,17 @@ bool CScriptCompressor::IsToScriptID(CScriptID &hash) const
     return false;
 }
 
-bool CScriptCompressor::IsToPubKey(std::vector<unsigned char> &pubkey) const
+bool CScriptCompressor::IsToPubKey(CPubKey &pubkey) const
 {
     if (script.size() == 35 && script[0] == 33 && script[34] == OP_CHECKSIG
                             && (script[1] == 0x02 || script[1] == 0x03)) {
-        pubkey.resize(33);
-        memcpy(&pubkey[0], &script[1], 33);
+        pubkey.Set(&script[1], &script[34]);
         return true;
     }
     if (script.size() == 67 && script[0] == 65 && script[66] == OP_CHECKSIG
                             && script[1] == 0x04) {
-        pubkey.resize(65);
-        memcpy(&pubkey[0], &script[1], 65);
-        CKey key;
-        return (key.SetPubKey(CPubKey(pubkey))); // SetPubKey fails if this is not a valid public key, a case that would not be compressible
+        pubkey.Set(&script[1], &script[66]);
+        return pubkey.IsFullyValid(); // if not fully valid, a case that would not be compressible
     }
     return false;
 }
@@ -1835,7 +1828,7 @@ bool CScriptCompressor::Compress(std::vector<unsigned char> &out) const
         memcpy(&out[1], &scriptID, 20);
         return true;
     }
-    std::vector<unsigned char> pubkey;
+    CPubKey pubkey;
     if (IsToPubKey(pubkey)) {
         out.resize(33);
         memcpy(&out[1], &pubkey[1], 32);
@@ -1888,14 +1881,12 @@ bool CScriptCompressor::Decompress(unsigned int nSize, const std::vector<unsigne
         return true;
     case 0x04:
     case 0x05:
-        std::vector<unsigned char> vch(33, 0x00);
+        unsigned char vch[33] = {};
         vch[0] = nSize - 2;
         memcpy(&vch[1], &in[0], 32);
-        CKey key;
-        if (!key.SetPubKey(CPubKey(vch)))
+        CPubKey pubkey(&vch[0], &vch[33]);
+        if (!pubkey.Decompress())
             return false;
-        key.SetCompressedPubKey(false); // Decompress public key
-        const CPubKey pubkey = key.GetPubKey();
         assert(pubkey.size() == 65);
         script.resize(67);
         script[0] = 65;
-- 
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