/*
set password via encrypted NT and LM hash buffers
*/
NTSTATUS samr_set_password_buffers(struct dcesrv_call_state *dce_call,
struct ldb_context *sam_ctx,
struct ldb_dn *account_dn,
struct ldb_dn *domain_dn,
TALLOC_CTX *mem_ctx,
const uint8_t *lm_pwd_hash,
const uint8_t *nt_pwd_hash)
{
struct samr_Password *d_lm_pwd_hash = NULL, *d_nt_pwd_hash = NULL;
DATA_BLOB session_key = data_blob(NULL, 0);
DATA_BLOB in, out;
NTSTATUS nt_status = NT_STATUS_OK;
nt_status = dcesrv_fetch_session_key(dce_call->conn, &session_key);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
if (lm_pwd_hash != NULL) {
in = data_blob_const(lm_pwd_hash, 16);
out = data_blob_talloc_zero(mem_ctx, 16);
sess_crypt_blob(&out, &in, &session_key, false);
d_lm_pwd_hash = (struct samr_Password *) out.data;
}
if (nt_pwd_hash != NULL) {
in = data_blob_const(nt_pwd_hash, 16);
out = data_blob_talloc_zero(mem_ctx, 16);
sess_crypt_blob(&out, &in, &session_key, false);
d_nt_pwd_hash = (struct samr_Password *) out.data;
}
if ((d_lm_pwd_hash != NULL) || (d_nt_pwd_hash != NULL)) {
nt_status = samdb_set_password(sam_ctx, mem_ctx, account_dn,
domain_dn, NULL,
d_lm_pwd_hash, d_nt_pwd_hash,
NULL, NULL, /* this is a password set */
NULL, NULL);
}
return nt_status;
}
char *decrypt_trustdom_secret(const char *pass, DATA_BLOB *data_in)
{
DATA_BLOB data_out, sess_key;
uchar nt_hash[16];
uint32_t length;
uint32_t version;
fstring cleartextpwd;
if (!data_in || !pass)
return NULL;
/* generate md4 password-hash derived from the NT UNICODE password */
E_md4hash(pass, nt_hash);
/* hashed twice with md4 */
mdfour(nt_hash, nt_hash, 16);
/* 16-Byte session-key */
sess_key = data_blob(nt_hash, 16);
if (sess_key.data == NULL)
return NULL;
data_out = data_blob(NULL, data_in->length);
if (data_out.data == NULL)
return NULL;
/* decrypt with des3 */
sess_crypt_blob(&data_out, data_in, &sess_key, 0);
/* 4 Byte length, 4 Byte version */
length = IVAL(data_out.data, 0);
version = IVAL(data_out.data, 4);
if (length > data_in->length - 8) {
DEBUG(0,("decrypt_trustdom_secret: invalid length (%d)\n", length));
return NULL;
}
if (version != 1) {
DEBUG(0,("decrypt_trustdom_secret: unknown version number (%d)\n", version));
return NULL;
}
rpcstr_pull(cleartextpwd, data_out.data + 8, sizeof(fstring), length, 0 );
#ifdef DEBUG_PASSWORD
DEBUG(100,("decrypt_trustdom_secret: length is: %d, version is: %d, password is: %s\n",
length, version, cleartextpwd));
#endif
data_blob_free(&data_out);
data_blob_free(&sess_key);
return SMB_STRDUP(cleartextpwd);
}