Ondřej Vejpustek
6 years ago
committed by
Pavol Rusnak
parent
8318ac35fc
commit
02a988cd26
@ -0,0 +1,3 @@
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[submodule "tests/wycheproof"]
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path = tests/wycheproof
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url = https://github.com/google/wycheproof
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@ -0,0 +1,643 @@
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#!/usr/bin/python
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import os
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from pyasn1.codec.der.decoder import decode as der_decode
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from pyasn1.codec.der.encoder import encode as der_encode
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from pyasn1.codec.ber.decoder import decode as ber_decode
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from pyasn1.type import univ, namedtype
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from binascii import unhexlify, hexlify
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import json
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import ctypes
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import pytest
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class EcSignature(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('r', univ.Integer()),
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namedtype.NamedType('s', univ.Integer())
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)
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class EcKeyInfo(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('key_type', univ.ObjectIdentifier()),
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namedtype.NamedType('curve_name', univ.ObjectIdentifier())
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)
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class EcPublicKey(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('key_info', EcKeyInfo()),
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namedtype.NamedType('public_key', univ.BitString())
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)
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class EdKeyInfo(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('key_type', univ.ObjectIdentifier()),
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)
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class EdPublicKey(univ.Sequence):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('key_info', EdKeyInfo()),
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namedtype.NamedType('public_key', univ.BitString())
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)
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class ParseError(Exception):
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pass
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class NotSupported(Exception):
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pass
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class DataError(Exception):
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pass
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class curve_info(ctypes.Structure):
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_fields_ = [("bip32_name", ctypes.c_char_p), ("params", ctypes.c_void_p)]
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def keys_in_dict(dictionary, keys):
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return keys <= set(dictionary.keys())
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def parse_eddsa_signature(signature):
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if len(signature) != 64:
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raise ParseError("Not a valid EdDSA signature")
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return signature
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def parse_ecdh256_privkey(private_key):
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if private_key < 0 or private_key.bit_length() > 256:
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raise ParseError("Not a valid 256 bit ECDH private key")
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return private_key.to_bytes(32, byteorder='big')
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def parse_signed_hex(string):
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if len(string) % 2 == 1:
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string = '0' + string
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number = int(string, 16)
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if int(string[0], 16) & 8:
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return -number
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else:
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return number
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def parse_result(result):
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if result == "valid":
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return True
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elif result == "invalid":
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return False
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elif result == "acceptable":
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return None
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else:
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raise DataError()
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def is_valid_der(data):
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try:
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structure, _ = der_decode(data)
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return data == der_encode(structure)
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except:
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return False
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def parse_ed_pubkey(public_key):
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try:
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public_key, _ = ber_decode(public_key, asn1Spec=EdPublicKey())
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except Exception:
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raise ParseError("Not a BER encoded Edwards curve public key")
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if not public_key['key_info']['key_type'] == univ.ObjectIdentifier('1.3.101.112'):
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raise ParseError("Not a BER encoded Edwards curve public key")
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public_key = bytes(public_key['public_key'].asOctets())
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return public_key
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def parse_ec_pubkey(public_key):
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try:
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public_key, _ = ber_decode(public_key, asn1Spec=EcPublicKey())
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except Exception:
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raise ParseError("Not a BER encoded named elliptic curve public key")
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if not public_key['key_info']['key_type'] == univ.ObjectIdentifier('1.2.840.10045.2.1'):
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raise ParseError("Not a BER encoded named elliptic curve public key")
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curve_identifier = public_key['key_info']['curve_name']
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curve_name = get_curve_name_by_identifier(curve_identifier)
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if curve_name is None:
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raise NotSupported('Unsupported named elliptic curve: {}'.format(curve_identifier))
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try:
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public_key = bytes(public_key['public_key'].asOctets())
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except:
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raise ParseError("Not a BER encoded named elliptic curve public key")
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return curve_name, public_key
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def parse_ecdsa256_signature(signature):
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s = signature
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if not is_valid_der(signature):
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raise ParseError("Not a valid DER")
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try:
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signature, _ = der_decode(signature, asn1Spec=EcSignature())
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except:
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raise ParseError("Not a valid DER encoded ECDSA signature")
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try:
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r = int(signature['r']).to_bytes(32, byteorder='big')
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s = int(signature['s']).to_bytes(32, byteorder='big')
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signature = r + s
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except:
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raise ParseError("Not a valid DER encoded 256 bit ECDSA signature")
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return signature
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def parse_digest(name):
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if name == "SHA-256":
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return 0
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else:
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raise NotSupported("Unsupported hash function: {}".format(name))
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def get_curve_by_name(name):
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lib.get_curve_by_name.restype = ctypes.c_void_p
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curve = lib.get_curve_by_name(bytes(name, 'ascii'))
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if curve == None:
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return None
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curve = ctypes.cast(curve, ctypes.POINTER(curve_info))
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return ctypes.c_void_p(curve.contents.params)
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def parse_curve_name(name):
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if name == 'secp256r1':
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return 'nist256p1'
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elif name == 'secp256k1':
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return 'secp256k1'
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elif name == 'curve25519':
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return 'curve25519'
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else:
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return None
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def get_curve_name_by_identifier(identifier):
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if identifier == univ.ObjectIdentifier('1.3.132.0.10'):
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return 'secp256k1'
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elif identifier == univ.ObjectIdentifier('1.2.840.10045.3.1.7'):
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return 'nist256p1'
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else:
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return None
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def chacha_poly_encrypt(key, iv, associated_data, plaintext):
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context = bytes(context_structure_length)
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tag = bytes(16)
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ciphertext = bytes(len(plaintext))
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lib.rfc7539_init(context, key, iv)
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lib.rfc7539_auth(context, associated_data, len(associated_data))
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lib.chacha20poly1305_encrypt(context, plaintext, ciphertext, len(plaintext))
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lib.rfc7539_finish(context, len(associated_data), len(plaintext), tag)
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return ciphertext, tag
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def chacha_poly_decrypt(key, iv, associated_data, ciphertext, tag):
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context = bytes(context_structure_length)
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computed_tag = bytes(16)
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plaintext = bytes(len(ciphertext))
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lib.rfc7539_init(context, key, iv)
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lib.rfc7539_auth(context, associated_data, len(associated_data))
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lib.chacha20poly1305_decrypt(context, ciphertext, plaintext, len(ciphertext))
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lib.rfc7539_finish(context, len(associated_data), len(ciphertext), computed_tag)
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return plaintext if tag == computed_tag else False
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def add_pkcs_padding(data):
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padding_length = 16 - len(data) % 16
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return data + bytes([padding_length]*padding_length)
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def remove_pkcs_padding(data):
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padding_length = data[-1]
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if not (0 < padding_length <= 16 and data[-padding_length:] == bytes([padding_length]*padding_length)):
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return False
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else:
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return data[:-padding_length]
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def aes_encrypt_initialise(key, context):
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if len(key) == (128/8):
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lib.aes_encrypt_key128(key, context)
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elif len(key) == (192/8):
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lib.aes_encrypt_key192(key, context)
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elif len(key) == (256/8):
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lib.aes_encrypt_key256(key, context)
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else:
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raise NotSupported("Unsupported key length: {}".format(len(key)*8))
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def aes_cbc_encrypt(key, iv, plaintext):
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plaintext = add_pkcs_padding(plaintext)
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context = bytes(context_structure_length)
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ciphertext = bytes(len(plaintext))
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aes_encrypt_initialise(key, context)
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lib.aes_cbc_encrypt(plaintext, ciphertext, len(plaintext), bytes(bytearray(iv)), context)
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return ciphertext
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def aes_decrypt_initialise(key, context):
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if len(key) == (128/8):
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lib.aes_decrypt_key128(key, context)
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elif len(key) == (192/8):
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lib.aes_decrypt_key192(key, context)
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elif len(key) == (256/8):
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lib.aes_decrypt_key256(key, context)
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else:
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raise NotSupported("Unsupported AES key length: {}".format(len(key)*8))
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def aes_cbc_decrypt(key, iv, ciphertext):
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context = bytes(context_structure_length)
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plaintext = bytes(len(ciphertext))
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aes_decrypt_initialise(key, context)
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lib.aes_cbc_decrypt(ciphertext, plaintext, len(ciphertext), iv, context)
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return remove_pkcs_padding(plaintext)
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def load_json_testvectors(filename):
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try:
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result = json.loads(open(os.path.join(testvectors_directory, filename)).read())
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except:
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raise DataError()
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return result
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def generate_aes(filename):
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vectors = []
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data = load_json_testvectors(filename)
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if not keys_in_dict(data, {'algorithm', 'testGroups'}):
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raise DataError()
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if data['algorithm'] != 'AES-CBC-PKCS5':
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raise DataError()
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for test_group in data['testGroups']:
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if not keys_in_dict(test_group, {'tests'}):
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raise DataError()
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for test in test_group['tests']:
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if not keys_in_dict(test, {'key', 'iv', 'msg', 'ct', 'result'}):
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raise DataError()
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try:
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key = unhexlify(test['key'])
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iv = unhexlify(test['iv'])
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plaintext = unhexlify(test['msg'])
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ciphertext = unhexlify(test['ct'])
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result = parse_result(test['result'])
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except:
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raise DataError()
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if len(key) not in [128/8, 192/8, 256/8]:
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continue
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if result is None:
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continue
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vectors.append((hexlify(key), hexlify(iv), hexlify(plaintext), hexlify(ciphertext), result))
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return vectors
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def generate_chacha_poly(filename):
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vectors = []
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data = load_json_testvectors(filename)
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if not keys_in_dict(data, {'algorithm', 'testGroups'}):
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raise DataError()
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if data['algorithm'] != 'CHACHA20-POLY1305':
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raise DataError()
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for test_group in data['testGroups']:
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if not keys_in_dict(test_group, {'tests'}):
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raise DataError()
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for test in test_group['tests']:
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if not keys_in_dict(test, {'key', 'iv', 'aad', 'msg', 'ct', 'tag', 'result'}):
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raise DataError()
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try:
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key = unhexlify(test['key'])
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iv = unhexlify(test['iv'])
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associated_data = unhexlify(test['aad'])
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plaintext = unhexlify(test['msg'])
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ciphertext = unhexlify(test['ct'])
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tag = unhexlify(test['tag'])
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result = parse_result(test['result'])
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except:
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raise DataError()
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if result is None:
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continue
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vectors.append((hexlify(key), hexlify(iv), hexlify(associated_data), hexlify(plaintext), hexlify(ciphertext), hexlify(tag), result))
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return vectors
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def generate_curve25519_dh(filename):
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vectors = []
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data = load_json_testvectors(filename)
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if not keys_in_dict(data, {'algorithm', 'testGroups'}):
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raise DataError()
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if data['algorithm'] != 'X25519':
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raise DataError()
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for test_group in data['testGroups']:
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if not keys_in_dict(test_group, {'tests'}):
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raise DataError()
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for test in test_group['tests']:
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if not keys_in_dict(test, {'public', 'private', 'shared', 'result', 'curve'}):
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raise DataError()
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try:
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public_key = unhexlify(test['public'])
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curve_name = parse_curve_name(test['curve'])
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private_key = unhexlify(test['private'])
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shared = unhexlify(test['shared'])
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result = parse_result(test['result'])
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except:
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raise DataError()
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if curve_name != 'curve25519':
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continue
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if result is None:
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continue
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vectors.append((hexlify(public_key), hexlify(private_key), hexlify(shared), result))
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return vectors
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def generate_ecdh(filename):
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vectors = []
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data = load_json_testvectors(filename)
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if not keys_in_dict(data, {'algorithm', 'testGroups'}):
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raise DataError()
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if data['algorithm'] != 'ECDH':
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raise DataError()
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for test_group in data['testGroups']:
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if not keys_in_dict(test_group, {'tests'}):
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raise DataError()
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for test in test_group['tests']:
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if not keys_in_dict(test, {'public', 'private', 'shared', 'result', 'curve'}):
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raise DataError()
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try:
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public_key = unhexlify(test['public'])
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curve_name = parse_curve_name(test['curve'])
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private_key = parse_signed_hex(test['private'])
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shared = unhexlify(test['shared'])
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result = parse_result(test['result'])
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except:
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raise DataError()
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try:
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private_key = parse_ecdh256_privkey(private_key)
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except ParseError:
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continue
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try:
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key_curve_name, public_key = parse_ec_pubkey(public_key)
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except NotSupported:
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continue
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except ParseError:
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continue
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if key_curve_name != curve_name:
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continue
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if result is None:
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continue
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vectors.append((curve_name, hexlify(public_key), hexlify(private_key), hexlify(shared), result))
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return vectors
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def generate_ecdsa(filename):
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vectors = []
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data = load_json_testvectors(filename)
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if not keys_in_dict(data, {'algorithm', 'testGroups'}):
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raise DataError()
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if data['algorithm'] != 'ECDSA':
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raise DataError()
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for test_group in data['testGroups']:
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if not keys_in_dict(test_group, {'tests', 'keyDer', 'sha'}):
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raise DataError()
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try:
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public_key = unhexlify(test_group['keyDer'])
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except:
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raise DataError()
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try:
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curve_name, public_key = parse_ec_pubkey(public_key)
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except NotSupported:
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continue
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except ParseError:
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continue
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try:
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hasher = parse_digest(test_group['sha'])
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except NotSupported:
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continue
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for test in test_group['tests']:
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if not keys_in_dict(test, {'sig', 'msg', 'result'}):
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raise DataError()
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try:
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signature = unhexlify(test['sig'])
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message = unhexlify(test['msg'])
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result = parse_result(test['result'])
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except:
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raise DataError()
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if result is None:
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continue
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try:
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signature = parse_ecdsa256_signature(signature)
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except ParseError:
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continue
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vectors.append((curve_name, hexlify(public_key), hasher, hexlify(message), hexlify(signature), result))
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return vectors
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def generate_eddsa(filename):
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vectors = []
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data = load_json_testvectors(filename)
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if not keys_in_dict(data, {'algorithm', 'testGroups'}):
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raise DataError()
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if data['algorithm'] != 'EDDSA':
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raise DataError()
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for test_group in data['testGroups']:
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if not keys_in_dict(test_group, {'tests', 'keyDer'}):
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raise DataError()
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try:
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||||
public_key = unhexlify(test_group['keyDer'])
|
||||
except:
|
||||
raise DataError()
|
||||
|
||||
try:
|
||||
public_key = parse_ed_pubkey(public_key)
|
||||
except ParseError:
|
||||
continue
|
||||
|
||||
for test in test_group['tests']:
|
||||
if not keys_in_dict(test, {'sig', 'msg', 'result'}):
|
||||
raise DataError()
|
||||
|
||||
try:
|
||||
signature = unhexlify(test['sig'])
|
||||
message = unhexlify(test['msg'])
|
||||
result = parse_result(test['result'])
|
||||
except:
|
||||
raise DataError()
|
||||
|
||||
if result is None:
|
||||
continue
|
||||
|
||||
try:
|
||||
signature = parse_eddsa_signature(signature)
|
||||
except ParseError:
|
||||
continue
|
||||
|
||||
vectors.append((hexlify(public_key), hexlify(message), hexlify(signature), result))
|
||||
|
||||
return vectors
|
||||
|
||||
|
||||
dir = os.path.abspath(os.path.dirname(__file__))
|
||||
lib = ctypes.cdll.LoadLibrary(os.path.join(dir, 'libtrezor-crypto.so'))
|
||||
testvectors_directory = os.path.join(dir, 'wycheproof/testvectors')
|
||||
context_structure_length = 1024
|
||||
|
||||
ecdh_vectors = generate_ecdh("ecdh_test.json")
|
||||
curve25519_dh_vectors = generate_curve25519_dh("x25519_test.json")
|
||||
eddsa_vectors = generate_eddsa("eddsa_test.json")
|
||||
ecdsa_vectors = generate_ecdsa("ecdsa_test.json") + generate_ecdsa("ecdsa_secp256k1_sha256_test.json") + generate_ecdsa("ecdsa_secp256r1_sha256_test.json")
|
||||
ecdh_vectors = generate_ecdh("ecdh_test.json") + generate_ecdh("ecdh_secp256k1_test.json") + generate_ecdh("ecdh_secp256r1_test.json")
|
||||
chacha_poly_vectors = generate_chacha_poly("chacha20_poly1305_test.json")
|
||||
aes_vectors = generate_aes("aes_cbc_pkcs5_test.json")
|
||||
|
||||
|
||||
@pytest.mark.parametrize("public_key, message, signature, result", eddsa_vectors)
|
||||
def test_eddsa(public_key, message, signature, result):
|
||||
public_key = unhexlify(public_key)
|
||||
signature = unhexlify(signature)
|
||||
message = unhexlify(message)
|
||||
|
||||
computed_result = lib.ed25519_sign_open(message, len(message), public_key, signature) == 0
|
||||
assert result == computed_result
|
||||
|
||||
|
||||
@pytest.mark.parametrize("curve_name, public_key, hasher, message, signature, result", ecdsa_vectors)
|
||||
def test_ecdsa(curve_name, public_key, hasher, message, signature, result):
|
||||
curve = get_curve_by_name(curve_name)
|
||||
if curve is None:
|
||||
raise NotSupported("Curve not supported: {}".format(curve_Name))
|
||||
|
||||
public_key = unhexlify(public_key)
|
||||
signature = unhexlify(signature)
|
||||
message = unhexlify(message)
|
||||
|
||||
computed_result = lib.ecdsa_verify(curve, hasher, public_key, signature, message, len(message)) == 0
|
||||
assert result == computed_result
|
||||
|
||||
|
||||
@pytest.mark.parametrize("public_key, private_key, shared, result", curve25519_dh_vectors)
|
||||
def test_curve25519_dh(public_key, private_key, shared, result):
|
||||
public_key = unhexlify(public_key)
|
||||
private_key = unhexlify(private_key)
|
||||
shared = unhexlify(shared)
|
||||
|
||||
computed_shared = bytes([0]*32)
|
||||
lib.curve25519_scalarmult(computed_shared, private_key, public_key)
|
||||
computed_result = shared == computed_shared
|
||||
assert result == computed_result
|
||||
|
||||
|
||||
@pytest.mark.parametrize("curve_name, public_key, private_key, shared, result", ecdh_vectors)
|
||||
def test_ecdh(curve_name, public_key, private_key, shared, result):
|
||||
curve = get_curve_by_name(curve_name)
|
||||
if curve is None:
|
||||
raise NotSupported("Curve not supported: {}".format(curve_name))
|
||||
|
||||
public_key = unhexlify(public_key)
|
||||
private_key = unhexlify(private_key)
|
||||
shared = unhexlify(shared)
|
||||
|
||||
computed_shared = bytes([0]*2*32)
|
||||
lib.ecdh_multiply(curve, private_key, public_key, computed_shared)
|
||||
computed_shared = computed_shared[1:33]
|
||||
computed_result = shared == computed_shared
|
||||
assert result == computed_result
|
||||
|
||||
|
||||
@pytest.mark.parametrize("key, iv, associated_data, plaintext, ciphertext, tag, result", chacha_poly_vectors)
|
||||
def test_chacha_poly(key, iv, associated_data, plaintext, ciphertext, tag, result):
|
||||
key = unhexlify(key)
|
||||
iv = unhexlify(iv)
|
||||
associated_data = unhexlify(associated_data)
|
||||
plaintext = unhexlify(plaintext)
|
||||
ciphertext = unhexlify(ciphertext)
|
||||
tag = unhexlify(tag)
|
||||
|
||||
computed_ciphertext, computed_tag = chacha_poly_encrypt(key, iv, associated_data, plaintext)
|
||||
computed_result = ciphertext == computed_ciphertext and tag == computed_tag
|
||||
assert result == computed_result
|
||||
|
||||
computed_plaintext = chacha_poly_decrypt(key, iv, associated_data, ciphertext, tag)
|
||||
computed_result = plaintext == computed_plaintext
|
||||
assert result == computed_result
|
||||
|
||||
|
||||
@pytest.mark.parametrize("key, iv, plaintext, ciphertext, result", aes_vectors)
|
||||
def test_aes(key, iv, plaintext, ciphertext, result):
|
||||
key = unhexlify(key)
|
||||
iv = unhexlify(iv)
|
||||
plaintext = unhexlify(plaintext)
|
||||
ciphertext = unhexlify(ciphertext)
|
||||
|
||||
computed_ciphertext = aes_cbc_encrypt(key, iv, plaintext)
|
||||
computed_result = ciphertext == computed_ciphertext
|
||||
assert result == computed_result
|
||||
|
||||
computed_plaintext = aes_cbc_decrypt(key, bytes(iv), ciphertext)
|
||||
computed_result = plaintext == computed_plaintext
|
||||
assert result == computed_result
|
||||
@ -0,0 +1 @@
|
||||
Subproject commit 2904be69e9d666bf3064fdc15093747e695cfae6
|
||||
Loading…
Reference in new issue