RSA Security 5 manual Pointer to a Becparamgenparams structure see above, FieldType = FTF2ONB

AI_ECParamGen

Argument	Values	Comments
fieldElementBits	64 - 384 bits	fieldType = FT_FP or
		FT_F2_POLYNOMIAL
	65, 66, 69, 74, 81, 82, 83, 86, 89, 90, 95,	fieldType = FT_F2_ONB
	98, 99, 100, 105, 106, 113, 119, 130,
	131, 134, 135, 138, 146, 148, 155, 158,
	162, 172, 173, 174, 178, 179, 180, 183,
	186, 189, 191, 194, 196, 209, 210, 221,
	226, 230, 231, 233, 239, 243, 245, 251,
	254, 261, 268, 270, 273, 278, 281, 292,
	293, 299, 303, 306, 309, 316, 323, 326,
	329, 330, 338, 346, 348, 350, 354, 359,
	371, 372, 375, 378
minOrderBits	0 (recommended);	0 tells Crypto-C to choose the value.
	1 to fieldElementBits	Note that not all values in the range
		1 - fieldElementBits are secure.
		Must be set to 0 if tableLookup = 1.
trialDivBound	0 (recommended); 1 - 384	0 tells Crypto-C to choose the value.
		Must be set to 0 if tableLookup = 1.
tableLookup	0 or 1	set to 0 if fieldType = FT_FP
		set to 0 if fieldType = FT_F2_ONB or
		FT_F2_POLYNOMIAL, and you want
		Crypto-C to generate new parameters
		from scratch. minOrderBits and
		trialDivBound may be non-zero.
		set to 1 if fieldType = FT_F2_ONB or
		FT_F2_POLYNOMIAL, and you want to
		generate curves using table lookup.
		Curve generation will be fast, but
		minOrderBits and trialDivBound must be
		set to 0.

Note: The parameter range given above for minOrderBits includes values that are not secure. If you pass 0 for minOrderBits, Crypto-C will choose the value for you. You should only pass a non-zero value if you are certain that you are fully aware of the underlying cryptographic issues.

Format of info returned by B_GetAlgorithmInfo:

pointer to a B_EC_PARAM_GEN_PARAMS structure (see above).

8 0 R S A B S A F E C r y p t o - C L i b r a r y R e f e r e n c e M a n u a l