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des3 parity

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This commit is contained in:
Takashi Kojo 2014-04-23 16:55:18 +09:00
parent fc24dca12d
commit 1ba30b1eb6
1 changed files with 30 additions and 5 deletions
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35
src/keys.c
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@ -1473,6 +1473,25 @@ static int SetPrefix(byte* sha_input, int idx)
#endif
static void setParity(byte *out, byte *in, int len) /* set parity for DES3 */
{
int i, j ;
byte v ;
int bits ;
for(i=0; i<len; i++) {
out[i] = in[i] ;
v = out[i] >> 1 ;
out[i] = v << 1 ;
bits = 0 ;
for(j=0; j<7; j++) {
bits += (v&0x1) ;
v = v >> 1 ;
}
out[i] |= (1 - (bits&0x1)) ;
}
}
static int SetKeys(Ciphers* enc, Ciphers* dec, Keys* keys, CipherSpecs* specs,
byte side, void* heap, int devId)
{
@ -1605,22 +1624,28 @@ static int SetKeys(Ciphers* enc, Ciphers* dec, Keys* keys, CipherSpecs* specs,
}
#endif
if (side == CYASSL_CLIENT_END) {
desRet = Des3_SetKey(enc->des3, keys->client_write_key,
byte key[DES_KEYLEN*3] ;
setParity(key, keys->client_write_key, DES_KEYLEN*3) ;
desRet = Des3_SetKey(enc->des3, key,
keys->client_write_IV, DES_ENCRYPTION);
if (desRet != 0)
return desRet;
desRet = Des3_SetKey(dec->des3, keys->server_write_key,
setParity(key, keys->server_write_key, DES_KEYLEN*3) ;
desRet = Des3_SetKey(dec->des3, key,
keys->server_write_IV, DES_DECRYPTION);
if (desRet != 0)
return desRet;
}
else {
desRet = Des3_SetKey(enc->des3, keys->server_write_key,
byte key[DES_KEYLEN*3] ;
setParity(key, keys->server_write_key, DES_KEYLEN*3) ;
desRet = Des3_SetKey(enc->des3, key,
keys->server_write_IV, DES_ENCRYPTION);
if (desRet != 0)
return desRet;
desRet = Des3_SetKey(dec->des3, keys->client_write_key,
keys->client_write_IV, DES_DECRYPTION);
setParity(key, keys->client_write_key, DES_KEYLEN*3) ;
desRet = Des3_SetKey(dec->des3, key,
keys->client_write_IV, DES_DECRYPTION);
if (desRet != 0)
return desRet;
}