1 files changed, 65 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/openssl/PEMUtilities.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/openssl/PEMUtilities.java
new file mode 100644
index 000000000..59f350060
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/openssl/PEMUtilities.java
@@ -0,0 +1,65 @@
+package org.spongycastle.openssl;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+import org.spongycastle.asn1.DERObjectIdentifier;
+import org.spongycastle.asn1.nist.NISTObjectIdentifiers;
+import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers;
+import org.spongycastle.util.Integers;
+
+public final class PEMUtilities
+{
+    private static final Map KEYSIZES = new HashMap();
+    private static final Set PKCS5_SCHEME_1 = new HashSet();
+    private static final Set PKCS5_SCHEME_2 = new HashSet();
+
+    static
+    {
+        PKCS5_SCHEME_1.add(PKCSObjectIdentifiers.pbeWithMD2AndDES_CBC);
+        PKCS5_SCHEME_1.add(PKCSObjectIdentifiers.pbeWithMD2AndRC2_CBC);
+        PKCS5_SCHEME_1.add(PKCSObjectIdentifiers.pbeWithMD5AndDES_CBC);
+        PKCS5_SCHEME_1.add(PKCSObjectIdentifiers.pbeWithMD5AndRC2_CBC);
+        PKCS5_SCHEME_1.add(PKCSObjectIdentifiers.pbeWithSHA1AndDES_CBC);
+        PKCS5_SCHEME_1.add(PKCSObjectIdentifiers.pbeWithSHA1AndRC2_CBC);
+
+        PKCS5_SCHEME_2.add(PKCSObjectIdentifiers.id_PBES2);
+        PKCS5_SCHEME_2.add(PKCSObjectIdentifiers.des_EDE3_CBC);
+        PKCS5_SCHEME_2.add(NISTObjectIdentifiers.id_aes128_CBC);
+        PKCS5_SCHEME_2.add(NISTObjectIdentifiers.id_aes192_CBC);
+        PKCS5_SCHEME_2.add(NISTObjectIdentifiers.id_aes256_CBC);
+
+        KEYSIZES.put(PKCSObjectIdentifiers.des_EDE3_CBC.getId(), Integers.valueOf(192));
+        KEYSIZES.put(NISTObjectIdentifiers.id_aes128_CBC.getId(), Integers.valueOf(128));
+        KEYSIZES.put(NISTObjectIdentifiers.id_aes192_CBC.getId(), Integers.valueOf(192));
+        KEYSIZES.put(NISTObjectIdentifiers.id_aes256_CBC.getId(), Integers.valueOf(256));
+    }
+
+    static int getKeySize(String algorithm)
+    {
+        if (!KEYSIZES.containsKey(algorithm))
+        {
+            throw new IllegalStateException("no key size for algorithm: " + algorithm);
+        }
+        
+        return ((Integer)KEYSIZES.get(algorithm)).intValue();
+    }
+
+    static boolean isPKCS5Scheme1(DERObjectIdentifier algOid)
+    {
+        return PKCS5_SCHEME_1.contains(algOid);
+    }
+
+    public static boolean isPKCS5Scheme2(ASN1ObjectIdentifier algOid)
+    {
+        return PKCS5_SCHEME_2.contains(algOid);
+    }
+
+    public static boolean isPKCS12(DERObjectIdentifier algOid)
+    {
+        return algOid.getId().startsWith(PKCSObjectIdentifiers.pkcs_12PbeIds.getId());
+    }
+}