Changing the Input Policy and Output Format

You can change the default mode and policy for ECC public key representation for each parameter object.

The setting of the mode determines both the output format and acceptable input format of ECC public keys. The policy settings determine whether to accept ECC public keys in any representation, or to reject representations other than the one specified for the input/output mode.

For example, assuming an appropriate ECC parameter object, params, has been created, the function call:

hu_ECCParamsModeSet( SB_ECC_COMPRESSION_OFF,
                     SB_ECC_POINT_INPUT_ACCEPT, 
                     params, 
                     globalCtx )

means that ECC public keys will be output in uncompressed format, and that any representation is accepted for input.

The function call:

hu_ECCParamsModeSet( SB_ECC_COMPRESSION_ON, 
                     SB_ECC_POINT_INPUT_REJECT, 
                     params, 
                     globalCtx )

means that ECC public keys will be output in compressed format, and that only compressed points are accepted for input.