When upgrading the cryptographic library from v3 to v4, how to initialize the B parameter to keep it backward compatible(to NULL value) while instantiating ECC curve? Keeping B parameter NULL when generating digital signature gives issue.

KMahe.11 · ‎2023-03-20

Amel NASRI · ‎2023-03-30

Hi @KMahe.1 ,

Please refer to the wiki article Security:Migration from previous Cryptographic Library version.

In this article, we precise:

Does this answer your question?

-Amel

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KMahe.11 · ‎2023-04-03

Hi @Amel NASRI ,

Thanks for the update. Actually I had gone through this WiKi page and also initialised the B curve to a value for Curve P-256 as per DSS standards (FIPS 186-3) but just wanted to make sure if initialising it to this value keeps it backward compatible with the code where we had initialised parameter B to NULL value (while using version3). Do we see any change in signature generation due to this change in value? Please share your inputs on the same. Thanks!!