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aligned AES and MAC keys

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orignal 2014-11-01 14:56:13 -04:00
parent 7a976dd5f2
commit 4334007688
4 changed files with 26 additions and 18 deletions
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21
hmac.h
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@ -5,6 +5,7 @@
#include <string.h>
#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1
#include <cryptopp/md5.h>
#include "Identity.h"
namespace i2p
{
@ -13,17 +14,19 @@ namespace crypto
const uint64_t IPAD = 0x3636363636363636;
const uint64_t OPAD = 0x5C5C5C5C5C5C5C5C;
inline void HMACMD5Digest (uint8_t * msg, size_t len, const uint8_t * key, uint8_t * digest)
typedef i2p::data::Tag<32> MACKey;
inline void HMACMD5Digest (uint8_t * msg, size_t len, const MACKey& key, uint8_t * digest)
// key is 32 bytes
// digest is 16 bytes
// block size is 64 bytes
{
uint64_t buf[256];
// ikeypad
buf[0] = ((uint64_t *)key)[0] ^ IPAD;
buf[1] = ((uint64_t *)key)[1] ^ IPAD;
buf[2] = ((uint64_t *)key)[2] ^ IPAD;
buf[3] = ((uint64_t *)key)[3] ^ IPAD;
buf[0] = key.GetLL ()[0] ^ IPAD;
buf[1] = key.GetLL ()[1] ^ IPAD;
buf[2] = key.GetLL ()[2] ^ IPAD;
buf[3] = key.GetLL ()[3] ^ IPAD;
buf[4] = IPAD;
buf[5] = IPAD;
buf[6] = IPAD;
@ -35,10 +38,10 @@ namespace crypto
CryptoPP::Weak1::MD5().CalculateDigest (hash, (uint8_t *)buf, len + 64);
// okeypad
buf[0] = ((uint64_t *)key)[0] ^ OPAD;
buf[1] = ((uint64_t *)key)[1] ^ OPAD;
buf[2] = ((uint64_t *)key)[2] ^ OPAD;
buf[3] = ((uint64_t *)key)[3] ^ OPAD;
buf[0] = key.GetLL ()[0] ^ OPAD;
buf[1] = key.GetLL ()[1] ^ OPAD;
buf[2] = key.GetLL ()[2] ^ OPAD;
buf[3] = key.GetLL ()[3] ^ OPAD;
buf[4] = OPAD;
buf[5] = OPAD;
buf[6] = OPAD;