1 files changed, 131 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/util/DigestFactory.java b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/util/DigestFactory.java
new file mode 100644
index 000000000..ab090ac8c
--- /dev/null
+++ b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/util/DigestFactory.java
@@ -0,0 +1,131 @@
+package org.spongycastle.jcajce.provider.util;
+
+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.nist.NISTObjectIdentifiers;
+import org.spongycastle.asn1.oiw.OIWObjectIdentifiers;
+import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers;
+import org.spongycastle.crypto.Digest;
+import org.spongycastle.crypto.digests.MD5Digest;
+import org.spongycastle.crypto.digests.SHA1Digest;
+import org.spongycastle.crypto.digests.SHA224Digest;
+import org.spongycastle.crypto.digests.SHA256Digest;
+import org.spongycastle.crypto.digests.SHA384Digest;
+import org.spongycastle.crypto.digests.SHA512Digest;
+import org.spongycastle.util.Strings;
+
+public class DigestFactory
+{
+    private static Set md5 = new HashSet();
+    private static Set sha1 = new HashSet();
+    private static Set sha224 = new HashSet();
+    private static Set sha256 = new HashSet();
+    private static Set sha384 = new HashSet();
+    private static Set sha512 = new HashSet();
+    
+    private static Map oids = new HashMap();
+    
+    static
+    {
+        md5.add("MD5");
+        md5.add(PKCSObjectIdentifiers.md5.getId());
+        
+        sha1.add("SHA1");
+        sha1.add("SHA-1");
+        sha1.add(OIWObjectIdentifiers.idSHA1.getId());
+        
+        sha224.add("SHA224");
+        sha224.add("SHA-224");
+        sha224.add(NISTObjectIdentifiers.id_sha224.getId());
+        
+        sha256.add("SHA256");
+        sha256.add("SHA-256");
+        sha256.add(NISTObjectIdentifiers.id_sha256.getId());
+        
+        sha384.add("SHA384");
+        sha384.add("SHA-384");
+        sha384.add(NISTObjectIdentifiers.id_sha384.getId());
+        
+        sha512.add("SHA512");
+        sha512.add("SHA-512");
+        sha512.add(NISTObjectIdentifiers.id_sha512.getId()); 
+
+        oids.put("MD5", PKCSObjectIdentifiers.md5);
+        oids.put(PKCSObjectIdentifiers.md5.getId(), PKCSObjectIdentifiers.md5);
+        
+        oids.put("SHA1", OIWObjectIdentifiers.idSHA1);
+        oids.put("SHA-1", OIWObjectIdentifiers.idSHA1);
+        oids.put(OIWObjectIdentifiers.idSHA1.getId(), OIWObjectIdentifiers.idSHA1);
+        
+        oids.put("SHA224", NISTObjectIdentifiers.id_sha224);
+        oids.put("SHA-224", NISTObjectIdentifiers.id_sha224);
+        oids.put(NISTObjectIdentifiers.id_sha224.getId(), NISTObjectIdentifiers.id_sha224);
+        
+        oids.put("SHA256", NISTObjectIdentifiers.id_sha256);
+        oids.put("SHA-256", NISTObjectIdentifiers.id_sha256);
+        oids.put(NISTObjectIdentifiers.id_sha256.getId(), NISTObjectIdentifiers.id_sha256);
+        
+        oids.put("SHA384", NISTObjectIdentifiers.id_sha384);
+        oids.put("SHA-384", NISTObjectIdentifiers.id_sha384);
+        oids.put(NISTObjectIdentifiers.id_sha384.getId(), NISTObjectIdentifiers.id_sha384);
+        
+        oids.put("SHA512", NISTObjectIdentifiers.id_sha512);
+        oids.put("SHA-512", NISTObjectIdentifiers.id_sha512);
+        oids.put(NISTObjectIdentifiers.id_sha512.getId(), NISTObjectIdentifiers.id_sha512); 
+    }
+    
+    public static Digest getDigest(
+        String digestName) 
+    {
+        digestName = Strings.toUpperCase(digestName);
+        
+        if (sha1.contains(digestName))
+        {
+            return new SHA1Digest();
+        }
+        if (md5.contains(digestName))
+        {
+            return new MD5Digest();
+        }
+        if (sha224.contains(digestName))
+        {
+            return new SHA224Digest();
+        }
+        if (sha256.contains(digestName))
+        {
+            return new SHA256Digest();
+        }
+        if (sha384.contains(digestName))
+        {
+            return new SHA384Digest();
+        }
+        if (sha512.contains(digestName))
+        {
+            return new SHA512Digest();
+        }
+        
+        return null;
+    }
+    
+    public static boolean isSameDigest(
+        String digest1,
+        String digest2)
+    {
+        return (sha1.contains(digest1) && sha1.contains(digest2))
+            || (sha224.contains(digest1) && sha224.contains(digest2))
+            || (sha256.contains(digest1) && sha256.contains(digest2))
+            || (sha384.contains(digest1) && sha384.contains(digest2))
+            || (sha512.contains(digest1) && sha512.contains(digest2))
+            || (md5.contains(digest1) && md5.contains(digest2));
+    }
+    
+    public static ASN1ObjectIdentifier getOID(
+        String digestName)
+    {
+        return (ASN1ObjectIdentifier)oids.get(digestName);
+    }
+}