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Build fix for 32-bit Linux and tweaks to address derivation algorithm.

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This commit is contained in:
Adam Ierymenko
2013-09-16 14:47:48 -04:00
parent e376c6f6a9
commit 4f53d09c7e
3 changed files with 27 additions and 27 deletions
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31
node/Identity.cpp
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@ -32,6 +32,7 @@
#include "Identity.hpp"
#include "SHA512.hpp"
#include "Salsa20.hpp"
namespace ZeroTier {
@ -130,8 +131,8 @@ bool Identity::fromString(const char *str)
// These are fixed parameters and can't be changed without a new
// identity type.
#define ZT_IDENTITY_DERIVEADDRESS_DIGESTS 2048
#define ZT_IDENTITY_DERIVEADDRESS_ROUNDS 8
#define ZT_IDENTITY_DERIVEADDRESS_MEMORY 16777216
#define ZT_IDENTITY_DERIVEADDRESS_ROUNDS 32
Address Identity::deriveAddress(const void *keyBytes,unsigned int keyLen)
{
@ -149,24 +150,26 @@ Address Identity::deriveAddress(const void *keyBytes,unsigned int keyLen)
* to similar concepts.
*/
unsigned char finalDigest[ZT_SHA512_DIGEST_LEN];
unsigned char *digests = new unsigned char[ZT_SHA512_DIGEST_LEN * ZT_IDENTITY_DERIVEADDRESS_DIGESTS];
unsigned char *ram = new unsigned char[ZT_IDENTITY_DERIVEADDRESS_MEMORY];
for(unsigned int i=0;i<ZT_IDENTITY_DERIVEADDRESS_MEMORY;++i)
ram[i] = ((const unsigned char *)keyBytes)[i % keyLen];
SHA512::hash(finalDigest,keyBytes,keyLen);
for(unsigned int i=0;i<(unsigned int)sizeof(digests);++i)
digests[i] = ((const unsigned char *)keyBytes)[i % keyLen];
unsigned char salsaKey[ZT_SHA512_DIGEST_LEN];
SHA512::hash(salsaKey,keyBytes,keyLen);
uint64_t nonce = 0;
for(unsigned int r=0;r<ZT_IDENTITY_DERIVEADDRESS_ROUNDS;++r) {
for(unsigned int i=0;i<(ZT_SHA512_DIGEST_LEN * ZT_IDENTITY_DERIVEADDRESS_DIGESTS);++i)
digests[i] ^= finalDigest[i % ZT_SHA512_DIGEST_LEN];
for(unsigned int d=0;d<ZT_IDENTITY_DERIVEADDRESS_DIGESTS;++d)
SHA512::hash(digests + (ZT_SHA512_DIGEST_LEN * d),digests,ZT_SHA512_DIGEST_LEN * ZT_IDENTITY_DERIVEADDRESS_DIGESTS);
SHA512::hash(finalDigest,digests,ZT_SHA512_DIGEST_LEN * ZT_IDENTITY_DERIVEADDRESS_DIGESTS);
nonce = Utils::crc64(nonce,ram,ZT_IDENTITY_DERIVEADDRESS_MEMORY);
Salsa20 s20(salsaKey,256,&nonce);
s20.encrypt(ram,ram,ZT_IDENTITY_DERIVEADDRESS_MEMORY);
}
delete [] digests;
unsigned char finalDigest[ZT_SHA512_DIGEST_LEN];
SHA512::hash(finalDigest,ram,ZT_IDENTITY_DERIVEADDRESS_MEMORY);
return Address(finalDigest,ZT_ADDRESS_LENGTH); // first 5 bytes of dig[]
delete [] ram;
return Address(finalDigest,ZT_ADDRESS_LENGTH);
}
} // namespace ZeroTier