github/ZeroTierOne
1
0
Fork 0
mirror of https://github.com/ZeroTier/ZeroTierOne synced 2025-07-16 10:03:14 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

HMAC fix

Browse source
This commit is contained in:
Adam Ierymenko 2019-09-04 15:22:15 -07:00
parent e8f8b0f8e5
commit 82b7e1dbcb
No known key found for this signature in database
GPG key ID: C8877CF2D7A5D7F3
3 changed files with 65 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

41
node/SHA512.hpp
View file

@ -92,38 +92,15 @@ void SHA384(void *digest,const void *data,unsigned int len);
void SHA384(void *digest,const void *data0,unsigned int len0,const void *data1,unsigned int len1);
#endif
static inline void HMACSHA384(const uint8_t key[32],const void *msg,const unsigned int msglen,uint8_t mac[48])
{
uint64_t kInPadded[16];
uint64_t outer[22]; // output padded key | H(input padded key | msg)
#ifdef ZT_NO_TYPE_PUNNING
for(int i=0;i<32;++i) ((uint8_t *)kInPadded)[i] = key[i] ^ 0x36;
for(int i=4;i<16;++i) kInPadded[i] = 0x3636363636363636ULL;
for(int i=0;i<32;++i) ((uint8_t *)outer)[i] = key[i] ^ 0x5c;
for(int i=4;i<16;++i) outer[i] = 0x5c5c5c5c5c5c5c5cULL;
#else
{
const uint64_t k0 = ((const uint64_t *)key)[0];
const uint64_t k1 = ((const uint64_t *)key)[1];
const uint64_t k2 = ((const uint64_t *)key)[2];
const uint64_t k3 = ((const uint64_t *)key)[3];
kInPadded[0] = k0 ^ 0x3636363636363636ULL;
kInPadded[0] = k1 ^ 0x3636363636363636ULL;
kInPadded[0] = k2 ^ 0x3636363636363636ULL;
kInPadded[0] = k3 ^ 0x3636363636363636ULL;
for(int i=4;i<16;++i) kInPadded[i] = 0x3636363636363636ULL;
outer[0] = k0 ^ 0x5c5c5c5c5c5c5c5cULL;
outer[1] = k1 ^ 0x5c5c5c5c5c5c5c5cULL;
outer[2] = k2 ^ 0x5c5c5c5c5c5c5c5cULL;
outer[3] = k3 ^ 0x5c5c5c5c5c5c5c5cULL;
for(int i=4;i<16;++i) outer[i] = 0x5c5c5c5c5c5c5c5cULL;
}
#endif
SHA384(((uint8_t *)outer) + 128,kInPadded,128,msg,msglen); // H(input padded key | msg)
SHA384(mac,outer,176); // H(output padded key | H(input padded key | msg))
}
/**
* Compute HMAC SHA-384 using a 256-bit key
*
* @param key Secret key
* @param msg Message to HMAC
* @param msglen Length of message
* @param mac Buffer to fill with result
*/
void HMACSHA384(const uint8_t key[32],const void *msg,const unsigned int msglen,uint8_t mac[48]);
} // namespace ZeroTier