ConstraintUtils (Bouncy Castle Library 1.85 API Specification)
Date: 2026-07-12

org.bouncycastle.crypto.constraints

## Class ConstraintUtils

- java.lang.Object
- - org.bouncycastle.crypto.constraints.ConstraintUtils

-     public class ConstraintUtils
      extends java.lang.Object

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `ConstraintUtils()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static int` | `bitsOfSecurityFor(java.math.BigInteger p)` Return the bits of security for the passed in RSA modulus or DH/DSA group value.
    `static int` | `bitsOfSecurityFor(ECCurve curve)` Return the bits of security for the passed in Elliptic Curve.
    `static int` | `bitsOfSecurityForFF(int strength)`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### ConstraintUtils

          public ConstraintUtils()

  - ### Method Detail

    - #### bitsOfSecurityFor

          public static int bitsOfSecurityFor(java.math.BigInteger p)

      Return the bits of security for the passed in RSA modulus or DH/DSA group value.
      Parameters:
        `p` - a modulus or group value
      Returns:
        the security strength in bits.

    - #### bitsOfSecurityFor

          public static int bitsOfSecurityFor(ECCurve curve)

      Return the bits of security for the passed in Elliptic Curve.
      Parameters:
        `curve` - the ECCurve of interest.
      Returns:
        the security strength in bits.

    - #### bitsOfSecurityForFF

          public static int bitsOfSecurityForFF(int strength)