mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-25 08:58:14 +00:00
525bbab165
The JSON schema of the test cases has slightly changed. The "curve" field has moved to the "testGroups" level and the X25519 algorithm has been renamed, which requires adjustments in the parsing code. A duplicate definition of "ecdh_vectors" has also been removed.
749 lines
22 KiB
Python
Executable File
749 lines
22 KiB
Python
Executable File
#!/usr/bin/env python
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import ctypes
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import json
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import os
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from binascii import hexlify, unhexlify
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import pytest
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from pyasn1.codec.ber.decoder import decode as ber_decode
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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.type import namedtype, univ
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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 Exception:
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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(
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"1.2.840.10045.2.1"
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):
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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(
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"Unsupported named elliptic curve: {}".format(curve_identifier)
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)
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try:
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public_key = bytes(public_key["public_key"].asOctets())
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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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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 Exception:
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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 Exception:
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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 is 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 (
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0 < padding_length <= 16
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and data[-padding_length:] == bytes([padding_length] * padding_length)
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):
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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(
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plaintext, ciphertext, len(plaintext), bytes(bytearray(iv)), context
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)
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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 Exception:
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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 Exception:
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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(
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(
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hexlify(key),
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hexlify(iv),
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hexlify(plaintext),
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hexlify(ciphertext),
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result,
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)
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)
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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(
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test, {"key", "iv", "aad", "msg", "ct", "tag", "result"}
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):
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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 Exception:
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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(
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(
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hexlify(key),
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hexlify(iv),
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hexlify(associated_data),
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hexlify(plaintext),
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hexlify(ciphertext),
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hexlify(tag),
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result,
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)
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)
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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"] != "XDH":
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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", "curve"}):
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raise DataError()
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try:
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curve_name = parse_curve_name(test_group["curve"])
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except Exception:
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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"}):
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raise DataError()
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try:
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public_key = unhexlify(test["public"])
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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 Exception:
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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(
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(hexlify(public_key), hexlify(private_key), hexlify(shared), result)
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)
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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", "curve"}):
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raise DataError()
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try:
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curve_name = parse_curve_name(test_group["curve"])
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except Exception:
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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"}):
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raise DataError()
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try:
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public_key = unhexlify(test["public"])
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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 Exception:
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raise DataError()
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|
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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(
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(
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curve_name,
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hexlify(public_key),
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hexlify(private_key),
|
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hexlify(shared),
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result,
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)
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)
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return vectors
|
|
|
|
|
|
def generate_ecdsa(filename):
|
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vectors = []
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|
|
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data = load_json_testvectors(filename)
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|
|
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if not keys_in_dict(data, {"algorithm", "testGroups"}):
|
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raise DataError()
|
|
|
|
if data["algorithm"] != "ECDSA":
|
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raise DataError()
|
|
|
|
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()
|
|
|
|
try:
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public_key = unhexlify(test_group["keyDer"])
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except Exception:
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raise DataError()
|
|
|
|
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
|
|
except ParseError:
|
|
continue
|
|
|
|
try:
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|
hasher = parse_digest(test_group["sha"])
|
|
except NotSupported:
|
|
continue
|
|
|
|
for test in test_group["tests"]:
|
|
if not keys_in_dict(test, {"sig", "msg", "result"}):
|
|
raise DataError()
|
|
|
|
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"])
|
|
except Exception:
|
|
raise DataError()
|
|
|
|
if result is None:
|
|
continue
|
|
|
|
try:
|
|
signature = parse_ecdsa256_signature(signature)
|
|
except ParseError:
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|
continue
|
|
|
|
vectors.append(
|
|
(
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curve_name,
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hexlify(public_key),
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|
hasher,
|
|
hexlify(message),
|
|
hexlify(signature),
|
|
result,
|
|
)
|
|
)
|
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|
|
return vectors
|
|
|
|
|
|
def generate_eddsa(filename):
|
|
vectors = []
|
|
|
|
data = load_json_testvectors(filename)
|
|
|
|
if not keys_in_dict(data, {"algorithm", "testGroups"}):
|
|
raise DataError()
|
|
|
|
if data["algorithm"] != "EDDSA":
|
|
raise DataError()
|
|
|
|
for test_group in data["testGroups"]:
|
|
if not keys_in_dict(test_group, {"tests", "keyDer"}):
|
|
raise DataError()
|
|
|
|
try:
|
|
public_key = unhexlify(test_group["keyDer"])
|
|
except Exception:
|
|
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 Exception:
|
|
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"))
|
|
if not lib.zkp_context_is_initialized():
|
|
assert lib.zkp_context_init() == 0
|
|
testvectors_directory = os.path.join(dir, "wycheproof/testvectors")
|
|
context_structure_length = 1024
|
|
|
|
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(
|
|
"curve_name, public_key, hasher, message, signature, result",
|
|
filter(lambda v: v[0] == "secp256k1", ecdsa_vectors),
|
|
)
|
|
def test_ecdsa_zkp(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.zkp_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
|