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-rw-r--r--crypto/src/asn1/x509/X509Name.cs8
-rw-r--r--crypto/src/operators/utilities/DefaultDigestAlgorithmFinder.cs12
-rw-r--r--crypto/src/pkcs/Pkcs10CertificationRequestDelaySigned.cs18
3 files changed, 13 insertions, 25 deletions
diff --git a/crypto/src/asn1/x509/X509Name.cs b/crypto/src/asn1/x509/X509Name.cs
index 8fd564090..6135ad2fa 100644
--- a/crypto/src/asn1/x509/X509Name.cs
+++ b/crypto/src/asn1/x509/X509Name.cs
@@ -532,11 +532,11 @@ namespace Org.BouncyCastle.Asn1.X509
             if (name.StartsWith("OID.", StringComparison.OrdinalIgnoreCase))
                 return new DerObjectIdentifier(name.Substring("OID.".Length));
 
-            if (name[0] >= '0' && name[0] <= '9')
-                return new DerObjectIdentifier(name);
-
-            if (lookup.TryGetValue(name, out var oid))
+            if (DerObjectIdentifier.TryFromID(name, out var oid) ||
+                lookup.TryGetValue(name, out oid))
+            {
                 return oid;
+            }
 
             throw new ArgumentException("Unknown object id - " + name + " - passed to distinguished name");
         }
diff --git a/crypto/src/operators/utilities/DefaultDigestAlgorithmFinder.cs b/crypto/src/operators/utilities/DefaultDigestAlgorithmFinder.cs
index 025b94622..4e71c8a94 100644
--- a/crypto/src/operators/utilities/DefaultDigestAlgorithmFinder.cs
+++ b/crypto/src/operators/utilities/DefaultDigestAlgorithmFinder.cs
@@ -308,16 +308,10 @@ namespace Org.BouncyCastle.Operators.Utilities
 
         public virtual AlgorithmIdentifier Find(string digestName)
         {
-            if (DigestNameToOids.TryGetValue(digestName, out var digestOid))
-                return Find(digestOid);
-
-            try
+            if (DigestNameToOids.TryGetValue(digestName, out var digestOid) ||
+                DerObjectIdentifier.TryFromID(digestName, out digestOid))
             {
-                return Find(new DerObjectIdentifier(digestName));
-            }
-            catch (Exception)
-            {
-                // ignore - tried it but it didn't work...
+                return Find(digestOid);
             }
 
             return null;
diff --git a/crypto/src/pkcs/Pkcs10CertificationRequestDelaySigned.cs b/crypto/src/pkcs/Pkcs10CertificationRequestDelaySigned.cs
index e3a710f37..f95cf826c 100644
--- a/crypto/src/pkcs/Pkcs10CertificationRequestDelaySigned.cs
+++ b/crypto/src/pkcs/Pkcs10CertificationRequestDelaySigned.cs
@@ -95,18 +95,12 @@ namespace Org.BouncyCastle.Pkcs
 			if (publicKey.IsPrivate)
 				throw new ArgumentException("expected public key", "publicKey");
 
-			DerObjectIdentifier sigOid = CollectionUtilities.GetValueOrNull(m_algorithms, signatureAlgorithm);
-			if (sigOid == null)
-			{
-				try
-				{
-					sigOid = new DerObjectIdentifier(signatureAlgorithm);
-				}
-				catch (Exception e)
-				{
-					throw new ArgumentException("Unknown signature type requested", e);
-				}
-			}
+            if (!m_algorithms.TryGetValue(signatureAlgorithm, out var sigOid) &&
+                !DerObjectIdentifier.TryFromID(signatureAlgorithm, out sigOid))
+            {
+                throw new ArgumentException("Unknown signature type requested");
+            }
+
 			if (m_noParams.Contains(sigOid))
 			{
 				this.sigAlgId = new AlgorithmIdentifier(sigOid);