Package org.bouncycastle.pqc.crypto.ntru

Class NTRUSigningParameters

  • All Implemented Interfaces:
    java.lang.Cloneable
    public class NTRUSigningParameters
extends java.lang.Object
implements java.lang.Cloneable
    A set of parameters for NtruSign. Several predefined parameter sets are available and new ones can be created as well.

    • Constructor Summary

      Constructors 
      Constructor Description
      NTRUSigningParameters​(int N, int q, int d, int B, double beta, double normBound, Digest hashAlg)
      Constructs a parameter set that uses ternary private keys (i.e.
      NTRUSigningParameters​(int N, int q, int d1, int d2, int d3, int B, double beta, double normBound, double keyNormBound, Digest hashAlg)
      Constructs a parameter set that uses product-form private keys (i.e.
      NTRUSigningParameters​(java.io.InputStream is)
      Reads a parameter set from an input stream.

    • Field Detail

      • N

        public int N

      • q

        public int q

      • d

        public int d

      • d1

        public int d1

      • d2

        public int d2

      • d3

        public int d3

      • B

        public int B

      • betaSq

        public double betaSq

      • normBoundSq

        public double normBoundSq

      • signFailTolerance

        public int signFailTolerance

      • hashAlg

        public Digest hashAlg

    • Constructor Detail

      • NTRUSigningParameters

        public NTRUSigningParameters​(int N,
                             int q,
                             int d,
                             int B,
                             double beta,
                             double normBound,
                             Digest hashAlg)
        Constructs a parameter set that uses ternary private keys (i.e. polyType=SIMPLE).
        Parameters:
        N - number of polynomial coefficients
        q - modulus
        d - number of -1's in the private polynomials f and g
        B - number of perturbations
        beta - balancing factor for the transpose lattice
        normBound - maximum norm for valid signatures
        hashAlg - a valid identifier for a java.security.MessageDigest instance such as SHA-256. The MessageDigest must support the getDigestLength() method.

      • NTRUSigningParameters

        public NTRUSigningParameters​(int N,
                             int q,
                             int d1,
                             int d2,
                             int d3,
                             int B,
                             double beta,
                             double normBound,
                             double keyNormBound,
                             Digest hashAlg)
        Constructs a parameter set that uses product-form private keys (i.e. polyType=PRODUCT).
        Parameters:
        N - number of polynomial coefficients
        q - modulus
        d1 - number of -1's in the private polynomials f and g
        d2 - number of -1's in the private polynomials f and g
        d3 - number of -1's in the private polynomials f and g
        B - number of perturbations
        beta - balancing factor for the transpose lattice
        normBound - maximum norm for valid signatures
        keyNormBound - maximum norm for the ploynomials F and G
        hashAlg - a valid identifier for a java.security.MessageDigest instance such as SHA-256. The MessageDigest must support the getDigestLength() method.

      • NTRUSigningParameters

        public NTRUSigningParameters​(java.io.InputStream is)
                      throws java.io.IOException
        Reads a parameter set from an input stream.
        Parameters:
        is - an input stream
        Throws:
        java.io.IOException

    • Method Detail

      • writeTo

        public void writeTo​(java.io.OutputStream os)
             throws java.io.IOException
        Writes the parameter set to an output stream
        Parameters:
        os - an output stream
        Throws:
        java.io.IOException

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object

      • equals

        public boolean equals​(java.lang.Object obj)
        Overrides:
        equals in class java.lang.Object

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object