155ad8c297
The functionality of ModOperationCommonArchSplit is needed in several subclasses, therefore moving it to a superclass. There is another, redundant ArchSplit class, which will be removed in a later commit. Signed-off-by: Janos Follath <janos.follath@arm.com>
284 lines
9 KiB
Python
284 lines
9 KiB
Python
"""Common features for bignum in test generation framework."""
|
|
# Copyright The Mbed TLS Contributors
|
|
# SPDX-License-Identifier: Apache-2.0
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from abc import abstractmethod
|
|
from typing import Iterator, List, Tuple, TypeVar
|
|
|
|
from . import test_case
|
|
from . import test_data_generation
|
|
|
|
T = TypeVar('T') #pylint: disable=invalid-name
|
|
|
|
def invmod(a: int, n: int) -> int:
|
|
"""Return inverse of a to modulo n.
|
|
|
|
Equivalent to pow(a, -1, n) in Python 3.8+. Implementation is equivalent
|
|
to long_invmod() in CPython.
|
|
"""
|
|
b, c = 1, 0
|
|
while n:
|
|
q, r = divmod(a, n)
|
|
a, b, c, n = n, c, b - q*c, r
|
|
# at this point a is the gcd of the original inputs
|
|
if a == 1:
|
|
return b
|
|
raise ValueError("Not invertible")
|
|
|
|
def hex_to_int(val: str) -> int:
|
|
"""Implement the syntax accepted by mbedtls_test_read_mpi().
|
|
|
|
This is a superset of what is accepted by mbedtls_test_read_mpi_core().
|
|
"""
|
|
if val in ['', '-']:
|
|
return 0
|
|
return int(val, 16)
|
|
|
|
def quote_str(val) -> str:
|
|
return "\"{}\"".format(val)
|
|
|
|
def bound_mpi(val: int, bits_in_limb: int) -> int:
|
|
"""First number exceeding number of limbs needed for given input value."""
|
|
return bound_mpi_limbs(limbs_mpi(val, bits_in_limb), bits_in_limb)
|
|
|
|
def bound_mpi_limbs(limbs: int, bits_in_limb: int) -> int:
|
|
"""First number exceeding maximum of given number of limbs."""
|
|
bits = bits_in_limb * limbs
|
|
return 1 << bits
|
|
|
|
def limbs_mpi(val: int, bits_in_limb: int) -> int:
|
|
"""Return the number of limbs required to store value."""
|
|
return (val.bit_length() + bits_in_limb - 1) // bits_in_limb
|
|
|
|
def combination_pairs(values: List[T]) -> List[Tuple[T, T]]:
|
|
"""Return all pair combinations from input values."""
|
|
return [(x, y) for x in values for y in values]
|
|
|
|
class OperationCommon(test_data_generation.BaseTest):
|
|
"""Common features for bignum binary operations.
|
|
|
|
This adds functionality common in binary operation tests.
|
|
|
|
Attributes:
|
|
symbol: Symbol to use for the operation in case description.
|
|
input_values: List of values to use as test case inputs. These are
|
|
combined to produce pairs of values.
|
|
input_cases: List of tuples containing pairs of test case inputs. This
|
|
can be used to implement specific pairs of inputs.
|
|
unique_combinations_only: Boolean to select if test case combinations
|
|
must be unique. If True, only A,B or B,A would be included as a test
|
|
case. If False, both A,B and B,A would be included.
|
|
arch_split: Boolean to select if different test cases are needed
|
|
depending on the architecture/limb size. This will cause test
|
|
objects being generated with different architectures. Individual
|
|
test objects can tell their architecture by accessing the
|
|
bits_in_limb instance variable.
|
|
"""
|
|
symbol = ""
|
|
input_values = [] # type: List[str]
|
|
input_cases = [] # type: List[Tuple[str, str]]
|
|
unique_combinations_only = True
|
|
arch_split = False
|
|
limb_sizes = [32, 64] # type: List[int]
|
|
|
|
def __init__(self, val_a: str, val_b: str, bits_in_limb: int = 64) -> None:
|
|
self.arg_a = val_a
|
|
self.arg_b = val_b
|
|
self.int_a = hex_to_int(val_a)
|
|
self.int_b = hex_to_int(val_b)
|
|
if bits_in_limb not in self.limb_sizes:
|
|
raise ValueError("Invalid number of bits in limb!")
|
|
if self.arch_split:
|
|
self.dependencies = ["MBEDTLS_HAVE_INT{:d}".format(bits_in_limb)]
|
|
self.bits_in_limb = bits_in_limb
|
|
|
|
def arguments(self) -> List[str]:
|
|
return [
|
|
quote_str(self.arg_a), quote_str(self.arg_b)
|
|
] + self.result()
|
|
|
|
def description(self) -> str:
|
|
"""Generate a description for the test case.
|
|
|
|
If not set, case_description uses the form A `symbol` B, where symbol
|
|
is used to represent the operation. Descriptions of each value are
|
|
generated to provide some context to the test case.
|
|
"""
|
|
if not self.case_description:
|
|
self.case_description = "{:x} {} {:x}".format(
|
|
self.int_a, self.symbol, self.int_b
|
|
)
|
|
return super().description()
|
|
|
|
@abstractmethod
|
|
def result(self) -> List[str]:
|
|
"""Get the result of the operation.
|
|
|
|
This could be calculated during initialization and stored as `_result`
|
|
and then returned, or calculated when the method is called.
|
|
"""
|
|
raise NotImplementedError
|
|
|
|
@classmethod
|
|
def get_value_pairs(cls) -> Iterator[Tuple[str, str]]:
|
|
"""Generator to yield pairs of inputs.
|
|
|
|
Combinations are first generated from all input values, and then
|
|
specific cases provided.
|
|
"""
|
|
if cls.unique_combinations_only:
|
|
yield from combination_pairs(cls.input_values)
|
|
else:
|
|
yield from (
|
|
(a, b)
|
|
for a in cls.input_values
|
|
for b in cls.input_values
|
|
)
|
|
yield from cls.input_cases
|
|
|
|
@classmethod
|
|
def generate_function_tests(cls) -> Iterator[test_case.TestCase]:
|
|
for a_value, b_value in cls.get_value_pairs():
|
|
if cls.arch_split:
|
|
for bil in cls.limb_sizes:
|
|
yield cls(a_value, b_value,
|
|
bits_in_limb=bil).create_test_case()
|
|
else:
|
|
yield cls(a_value, b_value).create_test_case()
|
|
|
|
|
|
class ModOperationCommon(OperationCommon):
|
|
#pylint: disable=abstract-method
|
|
"""Target for bignum mod_raw test case generation."""
|
|
|
|
def __init__(self, val_n: str, val_a: str, val_b: str = "0",
|
|
bits_in_limb: int = 64) -> None:
|
|
super().__init__(val_a=val_a, val_b=val_b, bits_in_limb=bits_in_limb)
|
|
self.val_n = val_n
|
|
|
|
@property
|
|
def int_n(self) -> int:
|
|
return hex_to_int(self.val_n)
|
|
|
|
@property
|
|
def boundary(self) -> int:
|
|
data_in = [self.int_a, self.int_b, self.int_n]
|
|
return max([n for n in data_in if n is not None])
|
|
|
|
@property
|
|
def limbs(self) -> int:
|
|
return limbs_mpi(self.boundary, self.bits_in_limb)
|
|
|
|
@property
|
|
def hex_digits(self) -> int:
|
|
return 2 * (self.limbs * self.bits_in_limb // 8)
|
|
|
|
@property
|
|
def hex_n(self) -> str:
|
|
return "{:x}".format(self.int_n).zfill(self.hex_digits)
|
|
|
|
@property
|
|
def hex_a(self) -> str:
|
|
return "{:x}".format(self.int_a).zfill(self.hex_digits)
|
|
|
|
@property
|
|
def hex_b(self) -> str:
|
|
return "{:x}".format(self.int_b).zfill(self.hex_digits)
|
|
|
|
@property
|
|
def r(self) -> int: # pylint: disable=invalid-name
|
|
l = limbs_mpi(self.int_n, self.bits_in_limb)
|
|
return bound_mpi_limbs(l, self.bits_in_limb)
|
|
|
|
@property
|
|
def r_inv(self) -> int:
|
|
return invmod(self.r, self.int_n)
|
|
|
|
@property
|
|
def r2(self) -> int: # pylint: disable=invalid-name
|
|
return pow(self.r, 2)
|
|
|
|
|
|
class OperationCommonArchSplit(OperationCommon):
|
|
#pylint: disable=abstract-method
|
|
"""Common features for operations where the result depends on
|
|
the limb size."""
|
|
|
|
def __init__(self, val_a: str, val_b: str, bits_in_limb: int) -> None:
|
|
super().__init__(val_a, val_b)
|
|
bound_val = max(self.int_a, self.int_b)
|
|
self.bits_in_limb = bits_in_limb
|
|
self.bound = bound_mpi(bound_val, self.bits_in_limb)
|
|
limbs = limbs_mpi(bound_val, self.bits_in_limb)
|
|
byte_len = limbs * self.bits_in_limb // 8
|
|
self.hex_digits = 2 * byte_len
|
|
if self.bits_in_limb == 32:
|
|
self.dependencies = ["MBEDTLS_HAVE_INT32"]
|
|
elif self.bits_in_limb == 64:
|
|
self.dependencies = ["MBEDTLS_HAVE_INT64"]
|
|
else:
|
|
raise ValueError("Invalid number of bits in limb!")
|
|
self.arg_a = self.arg_a.zfill(self.hex_digits)
|
|
self.arg_b = self.arg_b.zfill(self.hex_digits)
|
|
|
|
def pad_to_limbs(self, val) -> str:
|
|
return "{:x}".format(val).zfill(self.hex_digits)
|
|
|
|
@classmethod
|
|
def generate_function_tests(cls) -> Iterator[test_case.TestCase]:
|
|
for a_value, b_value in cls.get_value_pairs():
|
|
yield cls(a_value, b_value, 32).create_test_case()
|
|
yield cls(a_value, b_value, 64).create_test_case()
|
|
|
|
|
|
# BEGIN MERGE SLOT 1
|
|
|
|
# END MERGE SLOT 1
|
|
|
|
# BEGIN MERGE SLOT 2
|
|
|
|
# END MERGE SLOT 2
|
|
|
|
# BEGIN MERGE SLOT 3
|
|
|
|
# END MERGE SLOT 3
|
|
|
|
# BEGIN MERGE SLOT 4
|
|
|
|
# END MERGE SLOT 4
|
|
|
|
# BEGIN MERGE SLOT 5
|
|
|
|
# END MERGE SLOT 5
|
|
|
|
# BEGIN MERGE SLOT 6
|
|
|
|
# END MERGE SLOT 6
|
|
|
|
# BEGIN MERGE SLOT 7
|
|
|
|
# END MERGE SLOT 7
|
|
|
|
# BEGIN MERGE SLOT 8
|
|
|
|
# END MERGE SLOT 8
|
|
|
|
# BEGIN MERGE SLOT 9
|
|
|
|
# END MERGE SLOT 9
|
|
|
|
# BEGIN MERGE SLOT 10
|
|
|
|
# END MERGE SLOT 10
|