Merge remote-tracking branch 'tls/development' into development

Resolve conflicts by performing the following actions:
- Reject changes to ChangeLog, as Mbed Crypto doesn't have one
- Reject changes to tests/compat.sh, as Mbed Crypto doesn't have it
- Reject changes to programs/fuzz/onefile.c, as Mbed Crypto doesn't have
  it
- Resolve minor whitespace differences in library/ecdsa.c by taking the
  version from Mbed TLS upstream.

* origin/development:
  Honor MBEDTLS_CONFIG_FILE in fuzz tests
  Test that a shared library build produces a dynamically linked executable
  Test that the shared library build with CMake works
  Add a test of MBEDTLS_CONFIG_FILE
  Exclude DTLS 1.2 only with older OpenSSL
  Document the rationale for the armel build
  Switch armel build to -Os
  Add a build on ARMv5TE in ARM mode
  Add changelog entry for ARM assembly fix
  bn_mul.h: require at least ARMv6 to enable the ARM DSP code
  Adapt ChangeLog
  ECP restart: Don't calculate address of sub ctx if ctx is NULL

Author: Patater

include/mbedtls/bn_mul.h

@@ -642,7 +642,8 @@
            "r6", "r7", "r8", "r9", "cc"         \
          );
 
-#elif defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)
+#elif (__ARM_ARCH >= 6) && \
+    defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)
 
 #define MULADDC_INIT                            \
     asm(

library/ecdsa.c

@@ -172,7 +172,7 @@ static void ecdsa_restart_det_free( mbedtls_ecdsa_restart_det_ctx *ctx )
 }
 #endif /* MBEDTLS_ECDSA_DETERMINISTIC */
 
-#define ECDSA_RS_ECP   ( rs_ctx == NULL ? NULL :  &rs_ctx->ecp )
+#define ECDSA_RS_ECP    ( rs_ctx == NULL ? NULL : &rs_ctx->ecp )
 
 /* Utility macro for checking and updating ops budget */
 #define ECDSA_BUDGET( ops )   \

tests/scripts/all.sh

@@ -831,6 +831,26 @@ component_test_aes_fewer_tables_and_rom_tables () {
 component_test_make_shared () {
     msg "build/test: make shared" # ~ 40s
     make SHARED=1 all check -j1
+    ldd programs/util/strerror | grep libmbedcrypto
+}
+
+component_test_cmake_shared () {
+    msg "build/test: cmake shared" # ~ 2min
+    cmake -DUSE_SHARED_MBEDTLS_LIBRARY=On .
+    make
+    ldd programs/util/strerror | grep libmbedcrypto
+    make test
+}
+
+component_build_mbedtls_config_file () {
+    msg "build: make with MBEDTLS_CONFIG_FILE" # ~40s
+    # Use the full config so as to catch a maximum of places where
+    # the check of MBEDTLS_CONFIG_FILE might be missing.
+    scripts/config.pl full
+    sed 's!"check_config.h"!"mbedtls/check_config.h"!' <"$CONFIG_H" >full_config.h
+    echo '#error "MBEDTLS_CONFIG_FILE is not working"' >"$CONFIG_H"
+    make CFLAGS="-I '$PWD' -DMBEDTLS_CONFIG_FILE='\"full_config.h\"'"
+    rm -f full_config.h
 }
 
 component_test_m32_o0 () {
@@ -940,6 +960,17 @@ component_build_arm_none_eabi_gcc () {
     make CC=arm-none-eabi-gcc AR=arm-none-eabi-ar LD=arm-none-eabi-ld CFLAGS='-Werror -Wall -Wextra' lib
 }
 
+component_build_arm_none_eabi_gcc_arm5vte () {
+    msg "build: arm-none-eabi-gcc -march=arm5vte, make" # ~ 10s
+    scripts/config.pl baremetal
+    # Build for a target platform that's close to what Debian uses
+    # for its "armel" distribution (https://wiki.debian.org/ArmEabiPort).
+    # See https://github.com/ARMmbed/mbedtls/pull/2169 and comments.
+    # It would be better to build with arm-linux-gnueabi-gcc but
+    # we don't have that on our CI at this time.
+    make CC=arm-none-eabi-gcc AR=arm-none-eabi-ar CFLAGS='-Werror -Wall -Wextra -march=armv5te -O1' LDFLAGS='-march=armv5te' SHELL='sh -x' lib
+}
+
 component_build_arm_none_eabi_gcc_no_udbl_division () {
     msg "build: arm-none-eabi-gcc -DMBEDTLS_NO_UDBL_DIVISION, make" # ~ 10s
     scripts/config.pl baremetal