In commit de22f3a4e5, combination of
hardware and software MPI (bignum) related approach was used to
work around chip (e.g. ESP32-C3) limitation of max 3072 bits support.
This was done using linker "--wrap" flag but since the relevant API is
being used in same translation (compilation unit), hardware mode was not
getting used in some cases (e.g., RSA key generation).
This commit modified internal mbedTLS API and makes software+hardware
combination deterministic.
Using these ciphers can constitute a security risk if the server
uses a weak prime for the key exchange.
Footprint impact:
Roughly 3K saved in text+rodata in default https_request example
This commit add following crypto changes
1. Update current crypto code with upstream supplicant code
2. Add a proper porting layer to use mbedtls APIs for all the crypto
operations used by supplicant.
Internal crypto will be used when USE_MBEDLTS flag is disabled
in supplicant's menuconfig.
This commit also removes the clutter in crypto files due to partial
porting of some APIs to mbedtls, all the code from those files have
been removed and rewritten in a generic way, this is inspired from
current upstream code.
This also reduces the lib size significantly, supplicant's lib
size reduces around ~567kb after this change(NB: lib size doesn't
indicate reduction in final bin size).
Removed the old dynamically allocated GDMA channel approach.
It proved too unreliable as we couldn't not ensure consumers of the mbedtls
would properly free the channels after use.
Replaced by a single shared GDMA channel for AES and SHA, which won't be
released unless user specifically calls API for releasing it.
Add configuration option to fallback to software implementation
for exponential mod incase of hardware is not supporting it
for larger MPI value.
Usecase:
ESP32C3 only supports till RSA3072 in hardware. This config option
will help to support 4k certificates for WPA enterprise connection.
Fixed MBEDTLS_SSL_PROTO_TLS1_1 still being defined even ifCONFIG_MBEDTLS_SSL_PROTO_TLS1_1 is not
Signed-off-by: Aditya Patwardhan <aditya.patwardhan@espressif.com>
Merges https://github.com/espressif/esp-idf/pull/5675
* Replaced crypotoauthlib with esp-cryptoauthlib
* Added menuconfig option for esp-tls about using HSM
* Added error codes for HSM in esp-tls,
* Added support to select different type of ATECC608A chips
* Added README, updated docs
* tcp_transport: Added option to enable secure_element for ssl
Closes https://github.com/espressif/esp-idf/issues/4432
* Add options to mbedtls for hardware acceleration
* Disable mbedtls EC curves if hardware acceleration is selected
since the hardware will have to define the curves supported
* Add a hardware ecdsa example
The GCM hardware accelerated algorithm for S2 would sometimes output
the wrong tag.
Added additional tests for AES and GCM
Re-enable HW GCM as default option
Activated AES, RSA and SHA hardware acceleration for esp32s2 and enabled related unit tests.
Updated with changes made for ESP32 from 0a04034, 961f59f and caea288.
Added performance targets for esp32s2beta
Closes IDF-757
- Additional menuconfig option to select either mbedTLS or Tinycrypt from NimBLE.
- Addition of `CMAC` and `ECP_RESTARTABLE` to mbedTLS menuconfig option and
`esp_config.h`.
- Changes NimBLE `component.mk` and `CMakeLists.txt` to support mbedTLS option.
- Minor changes to `app_mesh.c` application.
ALT header files for sha1, sha256, sha512 are only supposed to declare
mbedtls_sha1_context data structure. Function prototypes should come
from original header files.
* Disables 3DES, Camellia, Blowfish, RC4, RIPEMD160, SSLv3, TLS-PSK modes, DTLS by default
* Saves about 40KB from the default TLS client code size
* Defaults no longer get "Bad" howsmyssl.com rating (no more vulnerable 3DES)
(ping https://github.com/espressif/arduino-esp32/issues/575 )
* Allows up to another 20-30KB code size to be trimmed without security
implications if using DER formatted certificates, RSA ciphersuites only,
etc.
* Can save up to another 8KB by setting the TLS Role to Server or Client only.
SHA hardware allows each of SHA1, SHA256, SHA384&SHA512 to calculate digests
concurrently.
Currently incompatible with AES acceleration due to a hardware reset problem.
Ref TW7111.
