mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-12-11 22:14:17 +01:00
1e14827beb
As a result, the copyright of contributors other than Arm is now
acknowledged, and the years of publishing are no longer tracked in the
source files.
Also remove the now-redundant lines declaring that the files are part of
MbedTLS.
This commit was generated using the following script:
# ========================
#!/bin/sh
# Find files
find '(' -path './.git' -o -path './3rdparty' ')' -prune -o -type f -print | xargs sed -bi '
# Replace copyright attribution line
s/Copyright.*Arm.*/Copyright The Mbed TLS Contributors/I
# Remove redundant declaration and the preceding line
$!N
/This file is part of Mbed TLS/Id
P
D
'
# ========================
Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
77 lines
2.7 KiB
Plaintext
77 lines
2.7 KiB
Plaintext
# test_zeroize.gdb
|
|
#
|
|
# 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.
|
|
#
|
|
# Purpose
|
|
#
|
|
# Run a test using the debugger to check that the mbedtls_platform_zeroize()
|
|
# function in platform_util.h is not being optimized out by the compiler. To do
|
|
# so, the script loads the test program at programs/test/zeroize.c and sets a
|
|
# breakpoint at the last return statement in main(). When the breakpoint is
|
|
# hit, the debugger manually checks the contents to be zeroized and checks that
|
|
# it is actually cleared.
|
|
#
|
|
# The mbedtls_platform_zeroize() test is debugger driven because there does not
|
|
# seem to be a mechanism to reliably check whether the zeroize calls are being
|
|
# eliminated by compiler optimizations from within the compiled program. The
|
|
# problem is that a compiler would typically remove what it considers to be
|
|
# "unnecessary" assignments as part of redundant code elimination. To identify
|
|
# such code, the compilar will create some form dependency graph between
|
|
# reads and writes to variables (among other situations). It will then use this
|
|
# data structure to remove redundant code that does not have an impact on the
|
|
# program's observable behavior. In the case of mbedtls_platform_zeroize(), an
|
|
# intelligent compiler could determine that this function clears a block of
|
|
# memory that is not accessed later in the program, so removing the call to
|
|
# mbedtls_platform_zeroize() does not have an observable behavior. However,
|
|
# inserting a test after a call to mbedtls_platform_zeroize() to check whether
|
|
# the block of memory was correctly zeroed would force the compiler to not
|
|
# eliminate the mbedtls_platform_zeroize() call. If this does not occur, then
|
|
# the compiler potentially has a bug.
|
|
#
|
|
# Note: This test requires that the test program is compiled with -g3.
|
|
|
|
set confirm off
|
|
|
|
file ./programs/test/zeroize
|
|
|
|
search GDB_BREAK_HERE
|
|
break $_
|
|
|
|
set args ./programs/test/zeroize.c
|
|
run
|
|
|
|
set $i = 0
|
|
set $len = sizeof(buf)
|
|
set $buf = buf
|
|
|
|
while $i < $len
|
|
if $buf[$i++] != 0
|
|
echo The buffer at was not zeroized\n
|
|
quit 1
|
|
end
|
|
end
|
|
|
|
echo The buffer was correctly zeroized\n
|
|
|
|
continue
|
|
|
|
if $_exitcode != 0
|
|
echo The program did not terminate correctly\n
|
|
quit 1
|
|
end
|
|
|
|
quit 0
|