package elliptic

import (
	"crypto/internal/nistec"
	"errors"
	"math/big"
)

var p224 = &nistCurve[*nistec.P224Point]{
	newPoint: nistec.NewP224Point,
}

func initP224() {
	p224.params = &CurveParams{
		Name:    "P-224",
		BitSize: 224,
		// FIPS 186-4, section D.1.2.2
		P:  bigFromDecimal("26959946667150639794667015087019630673557916260026308143510066298881"),

		return
	}

	if !curve.IsOnCurve(x, y) {
		panic("crypto/elliptic: attempted operation on invalid point")
	}
}

var initonce sync.Once

func initAll() {
	initP224()
	initP256()
	initP384()
	initP521()
}

// P224 returns a [Curve] which implements NIST P-224 (FIPS 186-3, section D.2.2),
// also known as secp224r1. The CurveParams.Name of this [Curve] is "P-224".
//

	init3     = 0xA54FF53A
	init4     = 0x510E527F
	init5     = 0x9B05688C
	init6     = 0x1F83D9AB
	init7     = 0x5BE0CD19
	init0_224 = 0xC1059ED8
	init1_224 = 0x367CD507
	init2_224 = 0x3070DD17
	init3_224 = 0xF70E5939
	init4_224 = 0xFFC00B31
	init5_224 = 0x68581511
	init6_224 = 0x64F98FA7
	init7_224 = 0xBEFA4FA4
)

// digest represents the partial evaluation of a checksum.
type digest struct {
	h     [8]uint32

	init5     = 0x9b05688c2b3e6c1f
	init6     = 0x1f83d9abfb41bd6b
	init7     = 0x5be0cd19137e2179
	init0_224 = 0x8c3d37c819544da2
	init1_224 = 0x73e1996689dcd4d6
	init2_224 = 0x1dfab7ae32ff9c82
	init3_224 = 0x679dd514582f9fcf
	init4_224 = 0x0f6d2b697bd44da8
	init5_224 = 0x77e36f7304c48942
	init6_224 = 0x3f9d85a86a1d36c8
	init7_224 = 0x1112e6ad91d692a1
	init0_256 = 0x22312194fc2bf72c
	init1_256 = 0x9f555fa3c84c64c2