void cred_hash3(unsigned char *out, const unsigned char *in, const unsigned char *key, int forw)
{
unsigned char key2[8];
memset(key2,'\0',8);
des_crypt56(out, in, key, forw);
key2[0] = key[7];
des_crypt56(out + 8, in + 8, key2, forw);
}
void SMBsesskeygen_lm_sess_key(const uint8_t lm_hash[16],
const uint8_t lm_resp[24], /* only uses 8 */
uint8_t sess_key[16])
{
/* Calculate the LM session key (effective length 40 bits,
but changes with each session) */
uint8_t p24[24];
uint8_t partial_lm_hash[14];
memcpy(partial_lm_hash, lm_hash, 8);
memset(partial_lm_hash + 8, 0xbd, 6);
des_crypt56(p24, lm_resp, partial_lm_hash, 1);
des_crypt56(p24+8, lm_resp, partial_lm_hash + 7, 1);
memcpy(sess_key, p24, 16);
#ifdef DEBUG_PASSWORD
DEBUG(100, ("SMBsesskeygen_lm_sess_key: \n"));
dump_data(100, sess_key, 16);
#endif
}
void sess_crypt_blob(DATA_BLOB *out, const DATA_BLOB *in, const DATA_BLOB *session_key, int forward)
{
int i, k;
for (i=0,k=0;
i<in->length;
i += 8, k += 7) {
uint8 bin[8], bout[8], key[7];
memset(bin, 0, 8);
memcpy(bin, &in->data[i], MIN(8, in->length-i));
if (k + 7 > session_key->length) {
k = (session_key->length - k);
}
memcpy(key, &session_key->data[k], 7);
des_crypt56(bout, bin, key, forward?1:0);
memcpy(&out->data[i], bout, MIN(8, in->length-i));
}
}
/*
DES decrypt a 8 byte LMSessionKey buffer using the Netlogon session key
*/
void netlogon_creds_des_decrypt_LMKey(struct netlogon_creds_CredentialState *creds, struct netr_LMSessionKey *key)
{
struct netr_LMSessionKey tmp;
des_crypt56(tmp.key, key->key, creds->session_key, 0);
*key = tmp;
}
