1 files changed, 41 insertions, 0 deletions
diff --git a/crypto/src/crypto/tls/TlsUtilities.cs b/crypto/src/crypto/tls/TlsUtilities.cs
index 485ecb760..be91e6c4b 100644
--- a/crypto/src/crypto/tls/TlsUtilities.cs
+++ b/crypto/src/crypto/tls/TlsUtilities.cs
@@ -21,6 +21,9 @@ namespace Org.BouncyCastle.Crypto.Tls
public abstract class TlsUtilities
{
public static readonly byte[] EmptyBytes = new byte[0];
+ public static readonly short[] EmptyShorts = new short[0];
+ public static readonly int[] EmptyInts = new int[0];
+ public static readonly long[] EmptyLongs = new long[0];
public static void CheckUint8(int i)
{
@@ -589,6 +592,37 @@ namespace Org.BouncyCastle.Crypto.Tls
return extensions == null ? null : (byte[])extensions[extensionType];
}
+ public static IList GetDefaultSupportedSignatureAlgorithms()
+ {
+ byte[] hashAlgorithms = new byte[]{ HashAlgorithm.sha1, HashAlgorithm.sha224, HashAlgorithm.sha256,
+ HashAlgorithm.sha384, HashAlgorithm.sha512 };
+ byte[] signatureAlgorithms = new byte[]{ SignatureAlgorithm.rsa, SignatureAlgorithm.dsa,
+ SignatureAlgorithm.ecdsa };
+
+ IList result = Platform.CreateArrayList();
+ for (int i = 0; i < signatureAlgorithms.Length; ++i)
+ {
+ for (int j = 0; j < hashAlgorithms.Length; ++j)
+ {
+ result.Add(new SignatureAndHashAlgorithm(hashAlgorithms[j], signatureAlgorithms[i]));
+ }
+ }
+ return result;
+ }
+
+ public static SignatureAndHashAlgorithm GetSignatureAndHashAlgorithm(TlsContext context,
+ TlsSignerCredentials signerCredentials)
+ {
+ SignatureAndHashAlgorithm signatureAndHashAlgorithm = null;
+ if (IsTlsV12(context))
+ {
+ signatureAndHashAlgorithm = signerCredentials.SignatureAndHashAlgorithm;
+ if (signatureAndHashAlgorithm == null)
+ throw new TlsFatalAlert(AlertDescription.internal_error);
+ }
+ return signatureAndHashAlgorithm;
+ }
+
public static bool HasExpectedEmptyExtensionData(IDictionary extensions, int extensionType,
byte alertDescription)
{
@@ -941,6 +975,13 @@ namespace Org.BouncyCastle.Crypto.Tls
}
}
+ public static IDigest CreateHash(SignatureAndHashAlgorithm signatureAndHashAlgorithm)
+ {
+ return signatureAndHashAlgorithm == null
+ ? new CombinedHash()
+ : CreateHash(signatureAndHashAlgorithm.Hash);
+ }
+
public static IDigest CloneHash(byte hashAlgorithm, IDigest hash)
{
switch (hashAlgorithm)
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