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Add HMAC SHA2 to IKE

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This commit is contained in:
Moataz Elmasry
2017-01-23 00:50:48 +01:00
parent 342d602f5d
commit 29234b7f9a
4 changed files with 129 additions and 33 deletions
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69
src/Cedar/IPsec_IkePacket.c
View File

@ -2558,7 +2558,7 @@ IKE_ENGINE *NewIkeEngine()
{
IKE_ENGINE *e = ZeroMalloc(sizeof(IKE_ENGINE));
IKE_CRYPTO *des, *des3, *aes;
IKE_HASH *sha1, *md5;
IKE_HASH *sha1, *md5, *sha2_256, *sha2_384, *sha2_512;
IKE_DH *dh1, *dh2, *dh5;
UINT des_key_sizes[] =
{
@ -2594,6 +2594,14 @@ IKE_ENGINE *NewIkeEngine()
// SHA-1
sha1 = NewIkeHash(e, IKE_HASH_SHA1_ID, IKE_HASH_SHA1_STRING, 20);
// SHA-2
// sha2-256
sha2_256 = NewIkeHash(e, IKE_HASH_SHA2_256_ID, IKE_HASH_SHA2_256_STRING, 32);
// sha2-384
sha2_384 = NewIkeHash(e, IKE_HASH_SHA2_384_ID, IKE_HASH_SHA2_384_STRING, 48);
// sha2-512
sha2_512 = NewIkeHash(e, IKE_HASH_SHA2_512_ID, IKE_HASH_SHA2_512_STRING, 64);
// MD5
md5 = NewIkeHash(e, IKE_HASH_MD5_ID, IKE_HASH_MD5_STRING, 16);
@ -2608,6 +2616,10 @@ IKE_ENGINE *NewIkeEngine()
e->IkeCryptos[IKE_P1_CRYPTO_AES_CBC] = aes;
e->IkeHashes[IKE_P1_HASH_MD5] = md5;
e->IkeHashes[IKE_P1_HASH_SHA1] = sha1;
//e->IkeHashes[IKE_P1_HASH_SHA2_256] = sha2_256;
//e->IkeHashes[IKE_P1_HASH_SHA2_384] = sha2_384;
//e->IkeHashes[IKE_P1_HASH_SHA2_512] = sha2_512;
// Definition of ESP algorithm
e->EspCryptos[IKE_TRANSFORM_ID_P2_ESP_DES] = des;
@ -2925,6 +2937,15 @@ void IkeHash(IKE_HASH *h, void *dst, void *src, UINT size)
// SHA-1
Sha1(dst, src, size);
break;
case IKE_HASH_SHA2_256_ID:
Sha2_256(dst, src, size);
break;
case IKE_HASH_SHA2_384_ID:
Sha2_384(dst, src, size);
break;
case IKE_HASH_SHA2_512_ID:
Sha2_512(dst, src, size);
break;
default:
// Unknown
@ -2936,11 +2957,26 @@ void IkeHash(IKE_HASH *h, void *dst, void *src, UINT size)
// Calculation of HMAC
void IkeHMac(IKE_HASH *h, void *dst, void *key, UINT key_size, void *data, UINT data_size)
{
UCHAR k[HMAC_BLOCK_SIZE];
UINT hmac_block_size;
if (h == NULL) {
return;
}
switch (h->HashId) {
case IKE_HASH_SHA1_ID:
case IKE_HASH_SHA2_256_ID:
hmac_block_size = HMAC_BLOCK_SIZE;
break;
case IKE_HASH_SHA2_384_ID:
case IKE_HASH_SHA2_512_ID:
hmac_block_size = HMAC_BLOCK_SIZE_1024;
break;
default: return;
}
UCHAR k[hmac_block_size];
UCHAR *data1;
UCHAR hash1[IKE_MAX_HASH_SIZE];
UINT data1_size;
UCHAR data2[IKE_MAX_HASH_SIZE + HMAC_BLOCK_SIZE];
UCHAR data2[IKE_MAX_HASH_SIZE + hmac_block_size];
UINT data2_size;
UCHAR tmp1600[1600];
bool no_free = false;
@ -2957,6 +2993,21 @@ void IkeHMac(IKE_HASH *h, void *dst, void *key, UINT key_size, void *data, UINT
HMacSha1(dst, key, key_size, data, data_size);
return;
}
else if (h->HashId == IKE_HASH_SHA2_256_ID)
{
HMacSha2_256(dst, key, key_size, data, data_size);
return;
}
else if (h->HashId == IKE_HASH_SHA2_384_ID)
{
HMacSha2_384(dst, key, key_size, data, data_size);
return;
}
else if (h->HashId == IKE_HASH_SHA2_512_ID)
{
HMacSha2_512(dst, key, key_size, data, data_size);
return;
}
else if (h->HashId == IKE_HASH_MD5_ID)
{
// Use the special function (fast) in the case of MD5
@ -2966,7 +3017,7 @@ void IkeHMac(IKE_HASH *h, void *dst, void *key, UINT key_size, void *data, UINT
// Creating a K
Zero(k, sizeof(k));
if (key_size <= HMAC_BLOCK_SIZE)
if (key_size <= hmac_block_size)
{
Copy(k, key, key_size);
}
@ -2976,7 +3027,7 @@ void IkeHMac(IKE_HASH *h, void *dst, void *key, UINT key_size, void *data, UINT
}
// Generation of data 1
data1_size = data_size + HMAC_BLOCK_SIZE;
data1_size = data_size + hmac_block_size;
if (data1_size > sizeof(tmp1600))
{
@ -2988,12 +3039,12 @@ void IkeHMac(IKE_HASH *h, void *dst, void *key, UINT key_size, void *data, UINT
no_free = true;
}
for (i = 0;i < HMAC_BLOCK_SIZE;i++)
for (i = 0;i < hmac_block_size;i++)
{
data1[i] = k[i] ^ 0x36;
}
Copy(data1 + HMAC_BLOCK_SIZE, data, data_size);
Copy(data1 + hmac_block_size, data, data_size);
// Calculate the hash value
IkeHash(h, hash1, data1, data1_size);
@ -3004,14 +3055,14 @@ void IkeHMac(IKE_HASH *h, void *dst, void *key, UINT key_size, void *data, UINT
}
// Generation of data 2
data2_size = h->HashSize + HMAC_BLOCK_SIZE;
data2_size = h->HashSize + hmac_block_size;
for (i = 0;i < HMAC_BLOCK_SIZE;i++)
{
data2[i] = k[i] ^ 0x5c;
}
Copy(data2 + HMAC_BLOCK_SIZE, hash1, h->HashSize);
Copy(data2 + hmac_block_size, hash1, h->HashSize);
// Calculate the hash value
IkeHash(h, dst, data2, data2_size);

14
src/Cedar/IPsec_IkePacket.h
View File

@ -120,7 +120,7 @@
#endif // OS_WIN32
// Maximum hash size
#define IKE_MAX_HASH_SIZE 20 // Size of SHA-1 is the maximum for now
#define IKE_MAX_HASH_SIZE 64 // Size of SHA-2-512 is the maximum for now
// Maximum block size
#define IKE_MAX_BLOCK_SIZE 16 // Size of AES is maximum at the moment
@ -250,6 +250,9 @@ struct IKE_TRANSFORM_VALUE
// Phase 1: The hash algorithm in IKE transform value
#define IKE_P1_HASH_MD5 1
#define IKE_P1_HASH_SHA1 2
#define IKE_P1_HASH_SHA2_256 4
#define IKE_P1_HASH_SHA2_384 5
#define IKE_P1_HASH_SHA2_512 6
// Phase 1: The authentication method in the IKE transform value
#define IKE_P1_AUTH_METHOD_PRESHAREDKEY 1
@ -530,6 +533,15 @@ struct IKE_P1_KEYSET
#define IKE_HASH_SHA1_ID 1
#define IKE_HASH_SHA1_STRING "SHA-1"
#define IKE_HASH_SHA2_256_ID 2
#define IKE_HASH_SHA2_256_STRING "SHA-2-256"
#define IKE_HASH_SHA2_384_ID 3
#define IKE_HASH_SHA2_384_STRING "SHA-2-384"
#define IKE_HASH_SHA2_512_ID 4
#define IKE_HASH_SHA2_512_STRING "SHA-2-512"
// Number and name of DH algorithm for IKE
#define IKE_DH_1_ID 0
#define IKE_DH_1_STRING "MODP 768 (Group 1)"