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add six new SLH-DSA parameter sets from NIST SP 800-230 #2292

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add six new SLH-DSA parameter sets from NIST SP 800-230 #2292

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c2c5d52
Update SLHDSAParameters.java
chen-cht May 5, 2026
f67f7ef
Update SLHDSAEngine.java
chen-cht May 5, 2026
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14 changes: 13 additions & 1 deletion core/src/main/java/org/bouncycastle/pqc/crypto/slhdsa/SLHDSAEngine.java
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Original file line number Diff line number Diff line change
Expand Up @@ -79,9 +79,21 @@ else if (N <= 256)
throw new IllegalArgumentException("cannot precompute SPX_WOTS_LEN2 for n outside {2, .., 256}");
}
}
else if (w == 4)
{
WOTS_LOGW = 2;
WOTS_LEN1 = (8 * N / WOTS_LOGW);
WOTS_LEN2 = (int)(Math.log(WOTS_LEN1 * (w - 1)) / Math.log(w)) + 1;
}
else if (w == 8)
{
WOTS_LOGW = 3;
WOTS_LEN1 = (8 * N / WOTS_LOGW);
WOTS_LEN2 = (int)(Math.log(WOTS_LEN1 * (w - 1)) / Math.log(w)) + 1;
}
else
{
throw new IllegalArgumentException("wots_w assumed 16 or 256");
throw new IllegalArgumentException("wots_w assumed 4, 8, 16 or 256");
}
this.WOTS_W = w;
this.WOTS_LEN = WOTS_LEN1 + WOTS_LEN2;
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23 changes: 23 additions & 0 deletions core/src/main/java/org/bouncycastle/pqc/crypto/slhdsa/SLHDSAParameters.java
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Expand Up @@ -52,6 +52,29 @@ interface SLHDSAEngineProvider
public static final SLHDSAParameters shake_256s = new SLHDSAParameters(
"shake-256s", new Shake256EngineProvider(32, 16, 8, 14, 22, 64), TYPE_PURE);

// SHA2-128-24
public static final SLHDSAParameters sha2_128_24 = new SLHDSAParameters(
"sha2-128-24", new Sha2EngineProvider(16, 4, 1, 24, 6, 22), TYPE_PURE);

// SHAKE-128-24
public static final SLHDSAParameters shake_128_24 = new SLHDSAParameters(
"shake-128-24", new Shake256EngineProvider(16, 4, 1, 24, 6, 22), TYPE_PURE);

// SHA2-192-24
public static final SLHDSAParameters sha2_192_24 = new SLHDSAParameters(
"sha2-192-24", new Sha2EngineProvider(24, 8, 1, 25, 9, 21), TYPE_PURE);

// SHAKE-192-24
public static final SLHDSAParameters shake_192_24 = new SLHDSAParameters(
"shake-192-24", new Shake256EngineProvider(24, 8, 1, 25, 9, 21), TYPE_PURE);

// SHA2-256-24
public static final SLHDSAParameters sha2_256_24 = new SLHDSAParameters(
"sha2-256-24", new Sha2EngineProvider(32, 4, 1, 25, 12, 21), TYPE_PURE);

// SHAKE-256-24
public static final SLHDSAParameters shake_256_24 = new SLHDSAParameters(
"shake-256-24", new Shake256EngineProvider(32, 4, 1, 25, 12, 21), TYPE_PURE);

// "Pre-hash" SLH-DSA Parameters
// SHA-2
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