DualECPoints (Bouncy Castle Library 1.68 API Specification)

java.lang.Object
- org.bouncycastle.crypto.prng.drbg.DualECPoints

```
public class DualECPoints
extends java.lang.Object
```
General class for providing point pairs for use with DualEC DRBG. See NIST SP 800-90A for further details.

Constructor Summary

Constructors
Constructor Description

DualECPoints(int securityStrength, ECPoint p, ECPoint q, int cofactor)
Base Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`getCofactor()`
`int`	`getMaxOutlen()`
`ECPoint`	`getP()`
`ECPoint`	`getQ()`
`int`	`getSecurityStrength()`
`int`	`getSeedLen()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- DualECPoints
```
public DualECPoints(int securityStrength,
                    ECPoint p,
                    ECPoint q,
                    int cofactor)
```
  Base Constructor.
  The cofactor is used to calculate the output block length (maxOutlen) according to
```
     max_outlen = largest multiple of 8 less than ((field size in bits) - (13 + log2(cofactor))
 
```
  Parameters:
  
  securityStrength - maximum security strength to be associated with these parameters
  
  p - the P point.
  
  q - the Q point.
  
  cofactor - cofactor associated with the domain parameters for the point generation.

Method Detail

getSeedLen
```
public int getSeedLen()
```

getMaxOutlen
```
public int getMaxOutlen()
```

getP
```
public ECPoint getP()
```

getQ
```
public ECPoint getQ()
```

getSecurityStrength
```
public int getSecurityStrength()
```

getCofactor
```
public int getCofactor()
```