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Merge pull request #9390 from eleuzi01/backport-9327

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[Backport 3.6] Remove hacks about asm vs constant-flow testing
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Manuel Pégourié-Gonnard 2024-09-03 07:37:07 +00:00 committed by GitHub
commit 33a2918a48
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3 changed files with 33 additions and 17 deletions
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3
include/mbedtls/check_config.h
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@ -247,6 +247,9 @@
#if defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN) && !defined(MBEDTLS_HAS_MEMSAN)
#error "MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN requires building with MemorySanitizer"
#endif
#if defined(MBEDTLS_HAS_MEMSAN) && defined(MBEDTLS_HAVE_ASM)
#error "MemorySanitizer does not support assembly implementation"
#endif
#undef MBEDTLS_HAS_MEMSAN // temporary macro defined above
#if defined(MBEDTLS_CCM_C) && \

17
library/constant_time_impl.h
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@ -36,24 +36,9 @@
#pragma GCC diagnostic ignored "-Wredundant-decls"
#endif
/* Disable asm under Memsan because it confuses Memsan and generates false errors.
*
* We also disable under Valgrind by default, because it's more useful
* for Valgrind to test the plain C implementation. MBEDTLS_TEST_CONSTANT_FLOW_ASM //no-check-names
* may be set to permit building asm under Valgrind.
*/
#if defined(MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN) || \
(defined(MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND) && !defined(MBEDTLS_TEST_CONSTANT_FLOW_ASM)) //no-check-names
#define MBEDTLS_CT_NO_ASM
#elif defined(__has_feature)
#if __has_feature(memory_sanitizer)
#define MBEDTLS_CT_NO_ASM
#endif
#endif
/* armcc5 --gnu defines __GNUC__ but doesn't support GNU's extended asm */
#if defined(MBEDTLS_HAVE_ASM) && defined(__GNUC__) && (!defined(__ARMCC_VERSION) || \
__ARMCC_VERSION >= 6000000) && !defined(MBEDTLS_CT_NO_ASM)
__ARMCC_VERSION >= 6000000)
#define MBEDTLS_CT_ASM
#if (defined(__arm__) || defined(__thumb__) || defined(__thumb2__))
#define MBEDTLS_CT_ARM_ASM

30
tests/scripts/components-sanitizers.sh
View File

@ -42,6 +42,7 @@ component_test_memsan_constant_flow () {
scripts/config.py set MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN
scripts/config.py unset MBEDTLS_USE_PSA_CRYPTO
scripts/config.py unset MBEDTLS_AESNI_C # memsan doesn't grok asm
scripts/config.py unset MBEDTLS_HAVE_ASM
CC=clang cmake -D CMAKE_BUILD_TYPE:String=MemSan .
make
@ -60,6 +61,7 @@ component_test_memsan_constant_flow_psa () {
scripts/config.py full
scripts/config.py set MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN
scripts/config.py unset MBEDTLS_AESNI_C # memsan doesn't grok asm
scripts/config.py unset MBEDTLS_HAVE_ASM
CC=clang cmake -D CMAKE_BUILD_TYPE:String=MemSan .
make
@ -93,7 +95,6 @@ component_release_test_valgrind_constant_flow () {
# Test asm path in constant time module - by default, it will test the plain C
# path under Valgrind or Memsan. Running only the constant_time tests is fast (<1s)
msg "test: valgrind asm constant_time"
scripts/config.py --force set MBEDTLS_TEST_CONSTANT_FLOW_ASM
skip_all_except_given_suite test_suite_constant_time
cmake -D CMAKE_BUILD_TYPE:String=Release .
make clean
@ -101,6 +102,32 @@ component_release_test_valgrind_constant_flow () {
make memcheck
}
component_release_test_valgrind_constant_flow_no_asm () {
# This tests both (1) everything that valgrind's memcheck usually checks
# (heap buffer overflows, use of uninitialized memory, use-after-free,
# etc.) and (2) branches or memory access depending on secret values,
# which will be reported as uninitialized memory. To distinguish between
# secret and actually uninitialized:
# - unset MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND - does the failure persist?
# - or alternatively, build with debug info and manually run the offending
# test suite with valgrind --track-origins=yes, then check if the origin
# was TEST_CF_SECRET() or something else.
msg "build: cmake release GCC, full config minus MBEDTLS_USE_PSA_CRYPTO, minus MBEDTLS_HAVE_ASM with constant flow testing"
scripts/config.py full
scripts/config.py set MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND
scripts/config.py unset MBEDTLS_USE_PSA_CRYPTO
scripts/config.py unset MBEDTLS_AESNI_C
scripts/config.py unset MBEDTLS_HAVE_ASM
skip_suites_without_constant_flow
cmake -D CMAKE_BUILD_TYPE:String=Release .
make
# this only shows a summary of the results (how many of each type)
# details are left in Testing/<date>/DynamicAnalysis.xml
msg "test: some suites (full minus MBEDTLS_USE_PSA_CRYPTO, minus MBEDTLS_HAVE_ASM, valgrind + constant flow)"
make memcheck
}
component_release_test_valgrind_constant_flow_psa () {
# This tests both (1) everything that valgrind's memcheck usually checks
# (heap buffer overflows, use of uninitialized memory, use-after-free,
@ -145,6 +172,7 @@ component_test_tsan () {
component_test_memsan () {
msg "build: MSan (clang)" # ~ 1 min 20s
scripts/config.py unset MBEDTLS_AESNI_C # memsan doesn't grok asm
scripts/config.py unset MBEDTLS_HAVE_ASM
CC=clang cmake -D CMAKE_BUILD_TYPE:String=MemSan .
make