#!/usr/bin/env python3
"""
test/unit_tests_d/ut_scrypt.py: password hashing unit test for the MMGen suite
"""

from ..include.common import *

class unit_test(object):

	def run_test(self,name,ut):
		import time

		msg_r('Testing password hashing...')
		qmsg('')
		from mmgen.crypto import scrypt_hash_passphrase

		salt = bytes.fromhex('f00f' * 16)

		presets = { '1': '64898d01ffcea1252c17411e7bd6c12d00191ee8ddcbf95420e5de8f37a7a1cb',
					'2': '625d0c59fcbcf85eca51b4337d3a4952e554c7c95fe32f4199ad0e9e9370e279',
					'3': 'b30a5cf0e606515be4a983cc4a1a4c21e04806f19aaa0ad354a353c83aecd3ee',
					'4': 'a3a1b99393734510b68adf2c2cfdc627a2bc3281913d8ea6fbb677d39781a9fa',
					'5': '0c7e1a672738cee49cf0ff6f3208190ca418e741835fd6995ce9558cc19f3f04',
					'6': '91f9d1c9baf3948433dab58dcc912d96035392c1db21ede96d2f369e025ab06d',
					'7': 'fcb2cd05268de43b0d2d45f78a56e5d446b0bd2d3b57bdbc77cc17a42942f1bd' }

		pws = ( ('',      'cc8d99ce7365d8a9d2422d71ce330e130b2cade46a8cc0459a3f83e1a6ac3d30'),
				('foo',   'f0e2cce1d9980edf2373a2070ad3560c2506faf9bc50704a1bc5cdb3c7f63f3b'),
				('φυβαρ', '64898d01ffcea1252c17411e7bd6c12d00191ee8ddcbf95420e5de8f37a7a1cb') )

		def test_passwords():
			for pw_base,res in pws:
				for pw in (pw_base,pw_base.encode()):
					pw_disp = "'"+pw+"'" if type(pw) == str else "b'"+pw.decode()+"'"
					if opt.quiet:
						omsg_r('.')
					else:
						msg_r('  password {:9} '.format(pw_disp))
					ret = scrypt_hash_passphrase(pw,salt,'1').hex()
					assert ret == res, ret

		def test_presets(do_presets):
			vmsg('  id    N   p  r')
			for hp in do_presets:
				hp = str(hp)
				res = presets[hp]
				pw = 'φυβαρ'
				if opt.quiet:
					omsg_r('.')
				else:
					msg_r('  {!r:3}: {!r:12}  '.format(hp,g.hash_presets[hp]))
				st = time.time()
				ret = scrypt_hash_passphrase(pw,salt,hp).hex()
				t = time.time() - st
				vmsg('  {:0.4f} secs'.format(t))
				assert ret == res, ret

		if opt.quiet: silence()

		g.force_standalone_scrypt_module = False
		vmsg('Passwords:')
		test_passwords()
		vmsg('Hash presets:')
		test_presets((1,2,3,4) if opt.fast else (1,2,3,4,5,6,7))

		g.force_standalone_scrypt_module = True
		vmsg('Passwords (standalone scrypt):')
		test_passwords()
		vmsg('Hash presets (standalone scrypt):')
		test_presets((1,2,3))

		if opt.quiet: end_silence()

		msg('OK')
		return True