fix: input length for ECCX08.ecSign() is 32 bytes

[fogzot]

When using ECCX08.ecSign() the input buffer should be exactly 32 bytes long. The old example worked only because the signature was generated and then checked on the first 32 bytes of the 64 bytes buffer.

[CLAassistant]

All committers have signed the CLA.

[github-actions]

Memory usage change @ b7f79d8

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m7	💚 -32 - 0	-0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_nano:nanorp2040connect	💚 -32 - 0	-0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:megaavr:uno2018	💚 -20 - 0	-0.04 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkr1000	💚 -32 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrgsm1400	💚 -32 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrnb1500	💚 -32 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrvidor4000	💚 -32 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwan1300	💚 -32 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwan1310	💚 -32 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwifi1010	💚 -32 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:nano_33_iot	💚 -32 - 0	-0.01 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	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	-32	-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	-32	-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	-20	-0.04	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkr1000	0	0.0	0	0.0	0	0.0	0	0.0	-32	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrgsm1400	0	0.0	0	0.0	0	0.0	0	0.0	-32	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrnb1500	0	0.0	0	0.0	0	0.0	0	0.0	-32	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrvidor4000	0	0.0	0	0.0	0	0.0	0	0.0	-32	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrwan1300	0	0.0	0	0.0	0	0.0	0	0.0	-32	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrwan1310	0	0.0	0	0.0	0	0.0	0	0.0	-32	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrwifi1010	0	0.0	0	0.0	0	0.0	0	0.0	-32	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:nano_33_iot	0	0.0	0	0.0	0	0.0	0	0.0	-32	-0.01	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0

Click for full report CSV

Board,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,-32,-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,-32,-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,-20,-0.04,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkr1000,0,0.0,0,0.0,0,0.0,0,0.0,-32,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrgsm1400,0,0.0,0,0.0,0,0.0,0,0.0,-32,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrnb1500,0,0.0,0,0.0,0,0.0,0,0.0,-32,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrvidor4000,0,0.0,0,0.0,0,0.0,0,0.0,-32,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrwan1300,0,0.0,0,0.0,0,0.0,0,0.0,-32,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrwan1310,0,0.0,0,0.0,0,0.0,0,0.0,-32,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrwifi1010,0,0.0,0,0.0,0,0.0,0,0.0,-32,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:nano_33_iot,0,0.0,0,0.0,0,0.0,0,0.0,-32,-0.01,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0

[manchoz]

@pennam, would you mind to review? Thanks!

[pennam]

👍 Thanks for the fix @fogzot