1 files changed, 108 insertions, 0 deletions

diff --git a/prov/src/main/java/org/spongycastle/jcajce/spec/GOST28147ParameterSpec.java b/prov/src/main/java/org/spongycastle/jcajce/spec/GOST28147ParameterSpec.java
new file mode 100644
index 00000000..2108d6f2
--- /dev/null
+++ b/prov/src/main/java/org/spongycastle/jcajce/spec/GOST28147ParameterSpec.java
@@ -0,0 +1,108 @@
+package org.spongycastle.jcajce.spec;
+
+import java.security.spec.AlgorithmParameterSpec;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+import org.spongycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
+import org.spongycastle.crypto.engines.GOST28147Engine;
+import org.spongycastle.util.Arrays;
+
+/**
+ * A parameter spec for the GOST-28147 cipher.
+ */
+public class GOST28147ParameterSpec
+    implements AlgorithmParameterSpec
+{
+    private byte[] iv = null;
+    private byte[] sBox = null;
+
+    public GOST28147ParameterSpec(
+        byte[] sBox)
+    {
+        this.sBox = new byte[sBox.length];
+        
+        System.arraycopy(sBox, 0, this.sBox, 0, sBox.length);
+    }
+
+    public GOST28147ParameterSpec(
+        byte[] sBox,
+        byte[] iv)
+    {
+        this(sBox);
+        this.iv = new byte[iv.length];
+        
+        System.arraycopy(iv, 0, this.iv, 0, iv.length);
+    }
+    
+    public GOST28147ParameterSpec(
+        String sBoxName)
+    {
+        this.sBox = GOST28147Engine.getSBox(sBoxName);
+    }
+
+    public GOST28147ParameterSpec(
+        String sBoxName,
+        byte[] iv)
+    {
+        this(sBoxName);
+        this.iv = new byte[iv.length];
+        
+        System.arraycopy(iv, 0, this.iv, 0, iv.length);
+    }
+
+    public GOST28147ParameterSpec(
+        ASN1ObjectIdentifier sBoxName,
+        byte[] iv)
+    {
+        this(getName(sBoxName));
+        this.iv = Arrays.clone(iv);
+    }
+
+    public byte[] getSbox()
+    {
+        return sBox;
+    }
+
+    /**
+     * Returns the IV or null if this parameter set does not contain an IV.
+     *
+     * @return the IV or null if this parameter set does not contain an IV.
+     */
+    public byte[] getIV()
+    {
+        if (iv == null)
+        {
+            return null;
+        }
+
+        byte[]  tmp = new byte[iv.length];
+
+        System.arraycopy(iv, 0, tmp, 0, tmp.length);
+
+        return tmp;
+    }
+
+    private static Map oidMappings = new HashMap();
+
+    static
+    {
+        oidMappings.put(CryptoProObjectIdentifiers.id_Gost28147_89_CryptoPro_A_ParamSet, "E-A");
+        oidMappings.put(CryptoProObjectIdentifiers.id_Gost28147_89_CryptoPro_B_ParamSet, "E-B");
+        oidMappings.put(CryptoProObjectIdentifiers.id_Gost28147_89_CryptoPro_C_ParamSet, "E-C");
+        oidMappings.put(CryptoProObjectIdentifiers.id_Gost28147_89_CryptoPro_D_ParamSet, "E-D");
+    }
+
+    private static String getName(ASN1ObjectIdentifier sBoxOid)
+    {
+        String sBoxName = (String)oidMappings.get(sBoxOid);
+
+        if (sBoxName == null)
+        {
+            throw new IllegalArgumentException("unknown OID: " + sBoxOid);
+        }
+
+        return sBoxName;
+    }
+}
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