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New prefixed hash functions and unit test.

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This commit is contained in:
JoelKatz
2012-06-25 09:12:35 -07:00
parent ee2b1580a5
commit 6a67b65f63
2 changed files with 54 additions and 2 deletions
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45
src/Serializer.cpp
View File

@@ -1,9 +1,15 @@
#include "Serializer.h"
#include "key.h"
#include <cassert>
#include <openssl/ripemd.h>
#include <openssl/sha.h>
#include <boost/test/unit_test.hpp>
#include "key.h"
int Serializer::addZeros(size_t uBytes)
{
int ret = mData.size();
@@ -238,6 +244,24 @@ uint256 Serializer::getSHA512Half(const std::string& strData)
return getSHA512Half(reinterpret_cast<const unsigned char*>(strData.c_str()), strData.size());
}
uint256 Serializer::getPrefixHash(uint32 prefix, const unsigned char *data, int len)
{
char be_prefix[4];
be_prefix[0] = static_cast<unsigned char>(prefix >> 24);
be_prefix[1] = static_cast<unsigned char>((prefix >> 16) & 0xff);
be_prefix[2] = static_cast<unsigned char>((prefix >> 8) & 0xff);
be_prefix[3] = static_cast<unsigned char>(prefix & 0xff);
uint256 j[2];
SHA512_CTX ctx;
SHA512_Init(&ctx);
SHA512_Update(&ctx, &be_prefix[0], 4);
SHA512_Update(&ctx, data, len);
SHA512_Final(reinterpret_cast<unsigned char *>(&j[0]), &ctx);
return j[0];
}
bool Serializer::checkSignature(int pubkeyOffset, int signatureOffset) const
{
std::vector<unsigned char> pubkey, signature;
@@ -593,4 +617,23 @@ std::vector<unsigned char> SerializerIterator::getRaw(int iLength)
return mSerializer.getRaw(iPos, iLength);
}
BOOST_AUTO_TEST_SUITE(Serializer_suite)
BOOST_AUTO_TEST_CASE( Serializer_PrefixHash_test )
{
Serializer s1;
s1.add32(3);
s1.add256(uint256());
Serializer s2;
s2.add32(0x12345600);
s2.addRaw(s1.peekData());
if (s1.getPrefixHash(0x12345600) != s2.getSHA512Half())
BOOST_FAIL("Prefix hash does not work");
}
BOOST_AUTO_TEST_SUITE_END();
// vim:ts=4

11
src/Serializer.h
View File

@@ -67,7 +67,7 @@ public:
bool getTaggedList(std::list<TaggedListItem>&, int offset, int& length) const;
bool getTaggedList(std::vector<TaggedListItem>&, int offset, int& length) const;
// hash functions
// normal hash functions
uint160 getRIPEMD160(int size=-1) const;
uint256 getSHA256(int size=-1) const;
uint256 getSHA512Half(int size=-1) const;
@@ -75,6 +75,15 @@ public:
static uint256 getSHA512Half(const unsigned char *data, int len);
static uint256 getSHA512Half(const std::string& strData);
// prefix hash functions
static uint256 getPrefixHash(uint32 prefix, const unsigned char *data, int len);
uint256 getPrefixHash(uint32 prefix) const
{ return getPrefixHash(prefix, &(mData.front()), mData.size()); }
static uint256 getPrefixHash(uint32 prefix, const std::vector<unsigned char>& data)
{ return getPrefixHash(prefix, &(data.front()), data.size()); }
static uint256 getPrefixHash(uint32 prefix, const std::string& strData)
{ return getPrefixHash(prefix, reinterpret_cast<const unsigned char *>(strData.c_str()), strData.size()); }
// totality functions
int getCapacity() const { return mData.capacity(); }
int getDataLength() const { return mData.size(); }