ensure device goes into idle even on error

[bobo]

When working with keys, the device is not put properly to sleep if there is an error (for example the key does not exist when reading it). This makes subsequent commands also fail.

For example if i have a key in slot 2 but not 1.

  printPublicKeyForSlot(1);
  printPublicKeyForSlot(2);

will not print any key.
while

printPublicKeyForSlot(2);
printPublicKeyForSlot(1);

will print the key for slot 2

[CLAassistant]

All committers have signed the CLA.

[github-actions]

Memory usage change @ 026f415

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m7	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_giga:giga	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_nano:nanorp2040connect	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_opta:opta	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:megaavr:uno2018	🔺 0 - +34	0.0 - +0.07	0 - 0	0.0 - 0.0
arduino:samd:mkr1000	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwan1300	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrgsm1400	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrnb1500	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrvidor4000	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwan1310	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwifi1010	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:nano_33_iot	🔺 0 - +4	0.0 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/ECCX08Counter flash	%	examples/ECCX08Counter RAM for global variables	%	examples/ECCX08HMAC flash	%	examples/ECCX08HMAC RAM for global variables	%	examples/ECCX08RandomNumber flash	%	examples/ECCX08RandomNumber RAM for global variables	%	examples/ECCX08Signing flash	%	examples/ECCX08Signing RAM for global variables	%	examples/Tools/ECCX08CSR flash	%	examples/Tools/ECCX08CSR RAM for global variables	%	examples/Tools/ECCX08JWSPublicKey flash	%	examples/Tools/ECCX08JWSPublicKey RAM for global variables	%	examples/Tools/ECCX08SelfSignedCert flash	%	examples/Tools/ECCX08SelfSignedCert RAM for global variables	%
arduino:mbed:envie_m7	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:mbed_giga:giga	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:mbed_nano:nanorp2040connect	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	2	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0
arduino:mbed_opta:opta	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:megaavr:uno2018	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	6	0.01	0	0.0	6	0.01	0	0.0	34	0.07	0	0.0
arduino:samd:mkr1000	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0
arduino:samd:mkrwan1300	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0
arduino:samd:mkrgsm1400	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0
arduino:samd:mkrnb1500	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0
arduino:samd:mkrvidor4000	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0
arduino:samd:mkrwan1310	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0
arduino:samd:mkrwifi1010	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0
arduino:samd:nano_33_iot	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0	4	0.0	0	0.0

Click for full report CSV

Board,examples/ECCX08Counter<br>flash,%,examples/ECCX08Counter<br>RAM for global variables,%,examples/ECCX08HMAC<br>flash,%,examples/ECCX08HMAC<br>RAM for global variables,%,examples/ECCX08RandomNumber<br>flash,%,examples/ECCX08RandomNumber<br>RAM for global variables,%,examples/ECCX08Signing<br>flash,%,examples/ECCX08Signing<br>RAM for global variables,%,examples/Tools/ECCX08CSR<br>flash,%,examples/Tools/ECCX08CSR<br>RAM for global variables,%,examples/Tools/ECCX08JWSPublicKey<br>flash,%,examples/Tools/ECCX08JWSPublicKey<br>RAM for global variables,%,examples/Tools/ECCX08SelfSignedCert<br>flash,%,examples/Tools/ECCX08SelfSignedCert<br>RAM for global variables,%
arduino:mbed:envie_m7,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_giga:giga,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_nano:nanorp2040connect,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,2,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0
arduino:mbed_opta:opta,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:megaavr:uno2018,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,6,0.01,0,0.0,6,0.01,0,0.0,34,0.07,0,0.0
arduino:samd:mkr1000,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0
arduino:samd:mkrwan1300,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0
arduino:samd:mkrgsm1400,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0
arduino:samd:mkrnb1500,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0
arduino:samd:mkrvidor4000,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0
arduino:samd:mkrwan1310,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0
arduino:samd:mkrwifi1010,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0
arduino:samd:nano_33_iot,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0,4,0.0,0,0.0