1 files changed, 80 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/crypto/params/DSAParameterGenerationParameters.java b/core/src/main/java/org/spongycastle/crypto/params/DSAParameterGenerationParameters.java
new file mode 100644
index 00000000..8822209c
--- /dev/null
+++ b/core/src/main/java/org/spongycastle/crypto/params/DSAParameterGenerationParameters.java
@@ -0,0 +1,80 @@
+package org.spongycastle.crypto.params;
+
+import java.security.SecureRandom;
+
+public class DSAParameterGenerationParameters
+{
+    public static final int DIGITAL_SIGNATURE_USAGE = 1;
+    public static final int KEY_ESTABLISHMENT_USAGE = 2;
+
+    private final int l;
+    private final int n;
+    private final int usageIndex;
+    private final int certainty;
+    private final SecureRandom random;
+
+    /**
+     * Construct without a usage index, this will do a random construction of G.
+     *
+     * @param L desired length of prime P in bits (the effective key size).
+     * @param N desired length of prime Q in bits.
+     * @param certainty certainty level for prime number generation.
+     * @param random the source of randomness to use.
+     */
+    public DSAParameterGenerationParameters(
+        int L,
+        int N,
+        int certainty,
+        SecureRandom random)
+    {
+        this(L, N, certainty, random, -1);
+    }
+
+    /**
+     * Construct for a specific usage index - this has the effect of using verifiable canonical generation of G.
+     *
+     * @param L desired length of prime P in bits (the effective key size).
+     * @param N desired length of prime Q in bits.
+     * @param certainty certainty level for prime number generation.
+     * @param random the source of randomness to use.
+     * @param usageIndex a valid usage index.
+     */
+    public DSAParameterGenerationParameters(
+        int L,
+        int N,
+        int certainty,
+        SecureRandom random,
+        int usageIndex)
+    {
+        this.l = L;
+        this.n = N;
+        this.certainty = certainty;
+        this.usageIndex = usageIndex;
+        this.random = random;
+    }
+
+    public int getL()
+    {
+        return l;
+    }
+
+    public int getN()
+    {
+        return n;
+    }
+
+    public int getCertainty()
+    {
+        return certainty;
+    }
+
+    public SecureRandom getRandom()
+    {
+        return random;
+    }
+
+    public int getUsageIndex()
+    {
+        return usageIndex;
+    }
+}