"mbedtls_ssl_handshake_params: reorder fields to save code size" moved this
filed earlier along with byte-sized fields that should be in the 128-element
access window on Arm Thumb. This took away precious room in the 128-byte
window. Move it back further out.
Results (same architecture, config-suite-b.h + MBEDTLS_ECDH_LEGACY_CONTEXT +
MBEDTLS_ECP_RESTARTABLE):
library/ssl_cli.o: 2860 -> 2816 (diff: 44)
library/ssl_msg.o: 3080 -> 3076 (diff: 4)
library/ssl_srv.o: 3340 -> 3300 (diff: 40)
library/ssl_tls.o: 6546 -> 6478 (diff: 68)
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Ensure that the documentation of fields affected by
"mbedtls_ssl_config: Replace bit-fields by separate bytes"
conveys information that may have been lost by removing the exact size of
the type. Extend the preexisting pattern "do this?" for formerly 1-bit
boolean fields. Indicate the possible values for non-boolean fields.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This slightly increases the RAM consumption per context, but saves code
size on architectures with an instruction for direct byte access (which is
most of them).
Although this is technically an API break, in practice, a realistic
application won't break: it would have had to bypass API functions and rely
on the field size (e.g. relying on -1 == 1 in a 1-bit field).
Results (arm-none-eabi-gcc 7.3.1, build_arm_none_eabi_gcc_m0plus build):
library/ssl_cli.o: 19543 -> 19559 (diff: -16)
library/ssl_msg.o: 24726 -> 24690 (diff: 36)
library/ssl_srv.o: 20462 -> 20418 (diff: 44)
library/ssl_tls.o: 20707 -> 20555 (diff: 152)
library/ssl_tls13_client.o: 7252 -> 7244 (diff: 8)
library/ssl_tls13_generic.o: 4705 -> 4693 (diff: 12)
Results (same architecture, config-suite-b.h + MBEDTLS_ECDH_LEGACY_CONTEXT +
MBEDTLS_ECP_RESTARTABLE):
library/ssl_cli.o: 2876 -> 2864 (diff: 12)
library/ssl_msg.o: 3068 -> 3080 (diff: -12)
library/ssl_srv.o: 3372 -> 3340 (diff: 32)
library/ssl_tls.o: 6658 -> 6566 (diff: 92)
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Move small fields first so that more fields can be within the Arm Thumb
128-element direct access window.
Keep the int section after the pointer section: moving int fields first cost
a few bytes on the reference baremetal-m0plus build.
The ordering in this commit is not based on field access frequency.
Results (arm-none-eabi-gcc 7.3.1, build_arm_none_eabi_gcc_m0plus build):
library/ssl_cli.o: 19687 -> 19543 (diff: 144)
library/ssl_msg.o: 24834 -> 24726 (diff: 108)
library/ssl_srv.o: 20562 -> 20462 (diff: 100)
library/ssl_tls.o: 20907 -> 20707 (diff: 200)
library/ssl_tls13_client.o: 7272 -> 7252 (diff: 20)
library/ssl_tls13_generic.o: 4721 -> 4705 (diff: 16)
Results (same architecture, config-suite-b.h + MBEDTLS_ECDH_LEGACY_CONTEXT +
MBEDTLS_ECP_RESTARTABLE):
library/ssl_cli.o: 2936 -> 2876 (diff: 60)
library/ssl_msg.o: 3080 -> 3068 (diff: 12)
library/ssl_srv.o: 3400 -> 3372 (diff: 28)
library/ssl_tls.o: 6730 -> 6658 (diff: 72)
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Reorder fields mbedtls_ssl_handshake_params in order to save code on Arm
Thumb builds. The general idea is to put often-used fields in the direct
access window of 128 elements from the beginning of the structure.
The reordering is a human selection based on a report of field offset and
use counts, and informed by measuring the code size with various
arrangements. Some notes:
* This is the same reordering as the corresponding commit in #5189 for 2.2x.
* I moved most byte-sized fields at the beginning where they're sure to be
in the direct access window.
* I moved buffering earlier because it can be around the threshold depending
on the configuration, and it's accessed in a lot of places.
* I moved several fields, including update_checksum and friends, early so
that they're guaranteed to be in the early access window.
Results (arm-none-eabi-gcc 7.3.1, build_arm_none_eabi_gcc_m0plus build):
library/ssl_cli.o: 19763 -> 19687 (diff: 76)
library/ssl_msg.o: 24874 -> 24834 (diff: 40)
library/ssl_srv.o: 20754 -> 20562 (diff: 192)
library/ssl_tls.o: 21003 -> 20907 (diff: 96)
library/ssl_tls13_client.o: 7284 -> 7272 (diff: 12)
library/ssl_tls13_generic.o: 4749 -> 4721 (diff: 28)
library/ssl_tls13_keys.o: 5133 -> 5077 (diff: 56)
Results (same architecture, config-suite-b.h + MBEDTLS_ECDH_LEGACY_CONTEXT +
MBEDTLS_ECP_RESTARTABLE):
library/ssl_cli.o: 3000 -> 2936 (diff: 64)
library/ssl_msg.o: 3084 -> 3080 (diff: 4)
library/ssl_srv.o: 3428 -> 3400 (diff: 28)
library/ssl_tls.o: 6754 -> 6730 (diff: 24)
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Replace bitfields mbedtls_ssl_handshake_params by bytes. This saves some
code size, and since the bitfields weren't group, this doesn't increase the
RAM usage.
Replace several ints that only store values in the range 0..255 by uint8_t.
This can increase or decrease the code size depending on the architecture
and on how the field is used. I chose changes that save code size on Arm
Thumb builds and will save more after field reordering.
Leave the bitfields in struct mbedtls_ssl_hs_buffer alone: replacing them by
uint8_t slightly increases the code size.
Results (arm-none-eabi-gcc 7.3.1, build_arm_none_eabi_gcc_m0plus build):
library/ssl_cli.o: 19759 -> 19763 (diff: -4)
library/ssl_srv.o: 20790 -> 20754 (diff: 36)
library/ssl_tls13_keys.o: 5153 -> 5133 (diff: 20)
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Move fields around to have fewer accesses outside the 128-element Thumb
direct access window.
Make the same change as in 2.27+, for the same small benefit.
Results (arm-none-eabi-gcc 7.3.1, build_arm_none_eabi_gcc_m0plus build):
library/psa_crypto.o: 16434 -> 16414 (diff: 20)
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Move fields around to have fewer accesses outside the 128-element Thumb
direct access window.
In psa_hkdf_key_derivation_t, move the large fields (output_block, prk,
hmac) after the state bit-fields. Experimentally, it's slightly better
to put hmac last.
Other operations structures don't go outside the window, at least when not
considering nested structures.
Results (arm-none-eabi-gcc 7.3.1, build_arm_none_eabi_gcc_m0plus build):
library/psa_crypto.o: 16510 -> 16434 (diff: 76)
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Empty the current line if it's entirely inside a comment.
Don't incorrectly end a block comment at the second line if it doesn't
contain `*/`.
Recognize `/*` to start a multiline comment even if it isn't at the start of
the line.
When stripping off comments, consistently strip off `/*` and `*/`.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Use '|'.join([comma-separated list]) rather than r'...|' r'...|'. This way
there's less risk of forgetting a '|'. Pylint will yell if we forget a comma
between list elements.
Use match rather than search + mandatory start anchor for EXCLUSION_LINES.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Make parse_identifiers less complex. Pylint was complaining that it had too
many local variables, and it had a point.
* Lift the constants identifier_regex and exclusion_lines to class
constants (renamed to uppercase because they're constants).
* Lift the per-file loop into a new function parse_identifiers_in_file.
No intended behavior change.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Fix cases like
```
/*short comment*/ /*long
comment */
int mbedtls_foo;
```
where the previous code thought that the second line started outside of a
comment and ended inside of a comment.
I believe that the new code strips comments correctly. It also strips string
literals, just in case.
Fixes#5191.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Several files among include/psa/crypto_*.h are not meant to be included
directly, and are not guaranteed to be valid if included directly. This
makes it harder to perform some static analyses. So make these files more
self-contained so that at least, if included on their own, there is no
missing macro or type definition (excluding the deliberate use of forward
declarations of structs and unions).
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
Remove useless component in all.sh
Remove use server logs in ssh-opt.sh
Remove useless guards in ssl_client2.c
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
Change client test code to support rsa pss signatures
Add test cases for rsa pss signature in ssl-opt.sh
Signed-off-by: XiaokangQian <xiaokang.qian@arm.com>
