Silicon Labs (silabs) Port

Support for the Silicon Labs hardware acceleration

Tested on ERF32 Gecko Series 2 device config 1 (Secure Element)

Building

To enable support define the following:

#define WOLFSSL_SILABS_SE_ACCEL

Simplicity Studio Example

For the Silicon Labs Simplicity Studio example see /IDE/SimplicityStudio/README.md.

Caveats

⚠️ Be sure to update the SE firmware Testing and results were done using SE firmware 1.2.6

Update was performed under Simplicity Studio directory: ./developer/adapter_packs/commander/commander flash ./offline/efr32/firmware/series2config1/se_firmware_package/s2c1_se_fw_upgrade_app_1v2p6.hex

AES GCM tags length >= 16 bytes
By default random generator is seeded by the TRNG, but not used to generate all random data. WOLFSSL_SILABS_TRNG can be set to generate all random data with hardware TRNG. On early SE firmware versions requesting too much data or too quickly may result in system reset and setting SESYSREQ.

Multi-threading

The SE manager supports multi-threading for FreeRTOS and Micrium (ref). If a different OS is used with multi-threading, additional mutex protection may be necessary.

Benchmarks

See our benchmarks on the wolfSSL website.

RNG                  2 MB took 1.004 seconds,    1.897 MB/s
AES-128-CBC-enc      5 MB took 1.001 seconds,    4.902 MB/s
AES-128-CBC-dec      5 MB took 1.004 seconds,    4.912 MB/s
AES-192-CBC-enc      5 MB took 1.002 seconds,    4.800 MB/s
AES-192-CBC-dec      5 MB took 1.000 seconds,    4.810 MB/s
AES-256-CBC-enc      5 MB took 1.001 seconds,    4.707 MB/s
AES-256-CBC-dec      5 MB took 1.005 seconds,    4.713 MB/s
AES-128-GCM-enc      4 MB took 1.000 seconds,    4.468 MB/s
AES-128-GCM-dec      4 MB took 1.005 seconds,    4.324 MB/s
AES-192-GCM-enc      4 MB took 1.003 seconds,    4.381 MB/s
AES-192-GCM-dec      4 MB took 1.001 seconds,    4.244 MB/s
AES-256-GCM-enc      4 MB took 1.005 seconds,    4.300 MB/s
AES-256-GCM-dec      4 MB took 1.002 seconds,    4.166 MB/s
AES-CCM-Enc          4 MB took 1.005 seconds,    4.203 MB/s
AES-CCM-Dec          4 MB took 1.005 seconds,    4.057 MB/s
SHA                  7 MB took 1.000 seconds,    7.202 MB/s
SHA-224              7 MB took 1.001 seconds,    7.341 MB/s
SHA-256              7 MB took 1.000 seconds,    7.349 MB/s
HMAC-SHA             6 MB took 1.001 seconds,    6.390 MB/s
HMAC-SHA224          6 MB took 1.003 seconds,    6.475 MB/s
HMAC-SHA256          6 MB took 1.000 seconds,    6.470 MB/s
ECC      256 key gen       169 ops took 1.003 sec, avg 5.935 ms, 168.495 ops/sec
ECDHE    256 agree         184 ops took 1.003 sec, avg 5.451 ms, 183.450 ops/sec
ECDSA    256 sign          158 ops took 1.010 sec, avg 6.392 ms, 156.436 ops/sec
ECDSA    256 verify        148 ops took 1.001 sec, avg 6.764 ms, 147.852 ops/sec

Support

Email us at support@wolfssl.com.

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