Class SM9Sm3

java.lang.Object
org.bouncycastle.crypto.generators.SM9Sm3
public class SM9Sm3 extends Object
The shared SM3-based auxiliary functions of SM9 (GM/T 0044-2016): the cryptographic functions H1 and H2 that map a byte string to an integer in [1, n-1] (GM/T 0044.2, 5.4), and the key derivation function KDF (GM/T 0044.3/0044.4). H_v is SM3 (256-bit output).

  • Method Summary

    Modifier and Type
    Method
    Description
    static BigInteger
    h1(byte[] z, BigInteger n)
    H1(Z, n): hash-to-range with the 0x01 domain prefix (GM/T 0044.2 5.4.2.2).
    static BigInteger
    h2(byte[] z, BigInteger n)
    H2(Z, n): hash-to-range with the 0x02 domain prefix (GM/T 0044.2 5.4.2.3).
    static byte[]
    kdf(byte[] z, int klenBits)
    The SM9 key derivation function KDF(Z, klen) (GM/T 0044.3/0044.4), a counter-mode construction over SM3 with a 32-bit big-endian counter starting at 1.

    Methods inherited from class Object

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

  • Method Details

    • h1

      public static BigInteger h1(byte[] z, BigInteger n)
      H1(Z, n): hash-to-range with the 0x01 domain prefix (GM/T 0044.2 5.4.2.2).

    • h2

      public static BigInteger h2(byte[] z, BigInteger n)
      H2(Z, n): hash-to-range with the 0x02 domain prefix (GM/T 0044.2 5.4.2.3).

    • kdf

      public static byte[] kdf(byte[] z, int klenBits)
      The SM9 key derivation function KDF(Z, klen) (GM/T 0044.3/0044.4), a counter-mode construction over SM3 with a 32-bit big-endian counter starting at 1. klenBits is the requested output length in bits.