Elliptic Curve Digital Signature: [message < G.ord]

[AArya2]

When using ippsSignDSA, does the developer have to feed a message smaller than the order of the generator or does the function itself compute the modulus in case it is not?

[Zhen_Z_Intel]

Dear customer,

The size of input message could be large than or equal to order of generator, then you could call Modular reduction function to padding 0 before message. But if you set message less than generator, how would you align with key pair?

Best regards,
Fiona

[AArya2]

Dear Fiona,

Thank you for your response. I don't mean the bit size of the message, but its numerical magnitude.