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#!/usr/bin/env python2
# Copyright 2016 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Module for testing ECIES using extended commands."""
from binascii import b2a_hex as b2a
from binascii import a2b_hex as a2b
from struct import pack
import subcmd
import utils
_ECIES_OPCODES = {
'ENCRYPT': 0x00,
'DECRYPT': 0x01,
}
#
# Command format.
#
# WIDTH FIELD
# 1 OP
# 1 MSB IN LEN
# 1 LSB IN LEN
# IN_LEN IN
# 1 MSB AUTH_DATA LEN
# 1 LSB AUTH_DATA LEN
# 16 IV
# 1 MSB PUB_X LEN
# 1 LSB PUB_X LEN
# PUB_X_LEN PUB_X
# 1 MSB PUB_Y LEN
# 1 LSB PUB_Y LEN
# PUB_Y_LEN PUB_Y
# 1 MSB SALT LEN
# 1 LSB SALT LEN
# SALT_LEN SALT
# 1 MSB INFO LEN
# 1 LSB INFO LEN
# INFO_LEN INFO
#
_ECIES_CMD_FORMAT = '{o:c}{inl:s}{input}{al:s}{iv}{xl:s}{x}{yl:s}{y}{sl:s}{s}{il:s}{i}'
_DEFAULT_SALT = 'Salt!'
_DEFAULT_INFO = 'Info!'
_STATIC_IV = ''.join([chr(x) for x in range(16)])
_ECIES_INPUTS = (
(
'',
'Test message!!',
_STATIC_IV,
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
a2b('98e76f53febd6bedc8fa19ce1543cb3f8f5cbc72c74602f1bfdee88c19d3d9d0'),
a2b('8750c295cd33be5846868e2869bf2c8cfeefbc4a574874c7388bf40f74e8e0e6'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'SIMPLE'
),
(
'',
'Multi block test message!!!!',
_STATIC_IV,
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
a2b('98e76f53febd6bedc8fa19ce1543cb3f8f5cbc72c74602f1bfdee88c19d3d9d0'),
a2b('8750c295cd33be5846868e2869bf2c8cfeefbc4a574874c7388bf40f74e8e0e6'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'MULTI-BLOCK'
),
(
'Auth data',
'Test message!!!!',
_STATIC_IV,
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
a2b('98e76f53febd6bedc8fa19ce1543cb3f8f5cbc72c74602f1bfdee88c19d3d9d0'),
a2b('8750c295cd33be5846868e2869bf2c8cfeefbc4a574874c7388bf40f74e8e0e6'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'AUTH-DATA'
),
(
'Auth data' * 10,
'Test message!!!!',
_STATIC_IV,
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
a2b('98e76f53febd6bedc8fa19ce1543cb3f8f5cbc72c74602f1bfdee88c19d3d9d0'),
a2b('8750c295cd33be5846868e2869bf2c8cfeefbc4a574874c7388bf40f74e8e0e6'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'LARGE-AUTH-DATA'
),
(
'Auth data',
'Test message!!!!' * 5,
_STATIC_IV,
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
a2b('98e76f53febd6bedc8fa19ce1543cb3f8f5cbc72c74602f1bfdee88c19d3d9d0'),
a2b('8750c295cd33be5846868e2869bf2c8cfeefbc4a574874c7388bf40f74e8e0e6'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'LARGE-PLAINTEXT-DATA'
),
(
'',
'Test message!!',
_STATIC_IV,
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
a2b('98e76f53febd6bedc8fa19ce1543cb3f8f5cbc72c74602f1bfdee88c19d3d9d0'),
a2b('8750c295cd33be5846868e2869bf2c8cfeefbc4a574874c7388bf40f74e8e0e6'),
'',
'',
'NO-SALT-INFO'
),
(
'Auth data',
'',
_STATIC_IV,
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
a2b('98e76f53febd6bedc8fa19ce1543cb3f8f5cbc72c74602f1bfdee88c19d3d9d0'),
a2b('8750c295cd33be5846868e2869bf2c8cfeefbc4a574874c7388bf40f74e8e0e6'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'AUTH-NULL-PLAINTEXT'
),
(
'',
'',
_STATIC_IV,
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
a2b('98e76f53febd6bedc8fa19ce1543cb3f8f5cbc72c74602f1bfdee88c19d3d9d0'),
a2b('8750c295cd33be5846868e2869bf2c8cfeefbc4a574874c7388bf40f74e8e0e6'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'NULL-PLAINTEXT'
),
)
_ECIES_COMPAT_INPUTS = (
(
a2b('d61262f22e8c70414777cbc060d1e387'),
'The quick brown fox jumps over the lazy dog.',
a2b('d61262f22e8c70414777cbc060d1e387'),
a2b('040c23b1abb7f7e3d2da6ffd70ce9e6f5bf90467c0e1f2e708483d2e61220f0a'
'0257110d695bec78ac1e15333219d7ba3f8f2f155b76acd56d99680031d83853'
'99d61262f22e8c70414777cbc060d1e387a4e9ac4624b79e326c19396b44842b'
'd995123343efe844821ff97ed08e38db59141ed8185359f76121d5fce7c4491d'
'902551bdd9bbd28e0ae27d1d4c9a6c1a9bb7b8aa36d1b1f6cce0425739'),
a2b('67e0df0b8e5131766340c895553c13053332fdee1fbd2d9cdde22a331a49aaa1'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'COMPAT-TEST1'
),
(
a2b('b3a89ed5a7fb6685a67db54c62e663e7'),
'Test message!!',
a2b('b3a89ed5a7fb6685a67db54c62e663e7'),
a2b('04b9d46d1f333baf6896ce7b64d344092671795438b1dc35a21b0d13b004f28a1c'
'edd4f1f7ff63106772270050cb62152b07e9c02bbee79db7a3fb4155c464e0d5b3'
'a89ed5a7fb6685a67db54c62e663e70fed2b44ce0f705e9a84a09978b82f6c603e'
'b6e6923d592f22193fb7ba0e1765ecd4861ec46c138d85b7206dbd41'),
a2b('6fdaf5e2e11dd61c116222c748d99b45f69031c9d4d3d5787a9a0fdd3b9c471a'),
_DEFAULT_SALT,
_DEFAULT_INFO,
'COMPAT-TEST2'
)
)
def _encrypt_cmd(auth, input, iv, pubx, puby, salt, info):
op = _ECIES_OPCODES['ENCRYPT']
return _ECIES_CMD_FORMAT.format(o=op, inl=pack('>H', len(auth+input)), input=auth+input,
al=pack('>H', len(auth)), iv=iv,
xl=pack('>H', len(pubx)), x=pubx,
yl=pack('>H', len(puby)), y=puby,
sl=pack('>H', len(salt)), s=salt,
il=pack('>H', len(info)), i=info)
def _decrypt_cmd(auth, input, iv, d, salt, info):
op = _ECIES_OPCODES['DECRYPT']
return _ECIES_CMD_FORMAT.format(o=op, inl=pack('>H', len(input)), input=input,
al=pack('>H', len(auth)), iv=iv,
xl=pack('>H', len(d)), x=d,
yl=pack('>H', 0), y='',
sl=pack('>H', len(salt)), s=salt,
il=pack('>H', len(info)), i=info)
def _ecies_test(tpm):
for data in _ECIES_INPUTS:
auth, input, iv, d, pubx, puby, salt, info = data[:-1]
test_name = 'ECIES-TEST:%s' % data[-1]
cmd = _encrypt_cmd(auth, input, iv, pubx, puby, salt, info)
wrapped_response = tpm.command(tpm.wrap_ext_command(subcmd.ECIES, cmd))
encrypted = tpm.unwrap_ext_response(subcmd.ECIES, wrapped_response)
# check length of encrypted.
if not encrypted:
raise subcmd.TpmTestError('%s error:%s' % (
test_name, 'null encrypted'))
cmd = _decrypt_cmd(auth, encrypted, iv, d, salt, info)
wrapped_response = tpm.command(tpm.wrap_ext_command(subcmd.ECIES, cmd))
decrypted = tpm.unwrap_ext_response(subcmd.ECIES, wrapped_response)
expected = auth + input
if decrypted != expected:
raise subcmd.TpmTestError('%s error:%s:%s' % (
test_name, utils.hex_dump(decrypted), utils.hex_dump(expected)))
print('%sSUCCESS: %s' % (utils.cursor_back(), test_name))
def _compat_test(tpm):
for data in _ECIES_COMPAT_INPUTS:
auth, plaintext, iv, ciphertext, d, salt, info = data[:-1]
test_name = 'ECIES-TEST:%s' % data[-1]
cmd = _decrypt_cmd(auth, ciphertext, iv, d, salt, info)
wrapped_response = tpm.command(tpm.wrap_ext_command(subcmd.ECIES, cmd))
decrypted = tpm.unwrap_ext_response(subcmd.ECIES, wrapped_response)
expected = auth + plaintext
if decrypted != expected:
raise subcmd.TpmTestError('%s error:%s:%s' % (
test_name, utils.hex_dump(decrypted), utils.hex_dump(expected)))
print('%sSUCCESS: %s' % (utils.cursor_back(), test_name))
def ecies_test(tpm):
_ecies_test(tpm)
_compat_test(tpm)
|
