GroupData Struct Reference

#include <parms.h>

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Detailed Description

Data type used to store parameters for particular Abelian groups.

Public Member Functions
int	check () const
	Check parameter generation if seeded, then perform a sanity check on this object.
str	oid () const
	Get an ASN.1 DER-encoded OID for the group parameters.
Data Fields
const char *	name
int	deg
const char *	p
const char *	order
const char *	seed
const char *	a
const char *	b
const char *	Gx
const char *	Gy
int	start
int	genseed

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Member Function Documentation

int check

(

)

const

Check parameter generation if seeded, then perform a sanity check on this object.

Returns:

0 (success)
non-zero, on error

Remarks:

See Key::loadoid(), Key::checkSeed(), Key::genpub(), Key::check() for specific error codes.

str oid

(

)

const

Get an ASN.1 DER-encoded OID for the group parameters.

Returns:

a str containing an ASN.1 OID representing the parameters suitable for passing to Key::loadoid().

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Field Documentation

const char* a

DSA: NULL
EC: first coefficient in curve's defining polynomial

const char * b

DSA: NULL
EC: second coefficient in curve's defining polynomial

int deg

DSA: hash function ID (0=SHA, 1=SHA-1)
EC2: degree of field extension
ECP: 0

int genseed

((p-1)/q)-th power is the group generator (NIST examples use 2, ISC uses 7)

const char* Gx

DSA: subgroup generator g
EC: x-coordinate of base point

const char * Gy

DSA: NULL
EC: y-coordinate of base point

const char* name

printable string describing these parameters

const char* order

DSA: q
EC: subgroup order (decimal or hex, if prefixed by "0x")

const char* p

prime modulus or irreducible polynomial (decimal or hex, if prefixed by "0x")

const char* seed

DSA/EC: NIST seed for pseudorandomly-generated parameters, otherwise an empty string

int start

starting value of counter (DSA only)

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The documentation for this struct was generated from the following file:

• parms.h

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ISC Cryptographic Development Kit - User's Guide
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