public bool VerifySignature (AsymmetricAlgorithm aa)
{
if (aa == null)
throw new ArgumentNullException ("aa");
if (aa is RSA)
return VerifySignature (aa as RSA);
else if (aa is DSA)
return VerifySignature (aa as DSA);
else
throw new NotSupportedException ("Unknown Asymmetric Algorithm " + aa.ToString ());
}
static public byte[] Encode (AsymmetricAlgorithm aa)
{
if (aa is RSA)
return Encode ((RSA)aa);
else if (aa is DSA)
return Encode ((DSA)aa);
else
throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
}
public bool VerifySignature (AsymmetricAlgorithm aa)
{
if (aa == null)
throw new ArgumentNullException ("aa");
// only validate the signature (in case we don't have the CA certificate)
if (aa is RSA)
return VerifySignature (aa as RSA);
else if (aa is DSA)
return VerifySignature (aa as DSA);
else
throw new NotSupportedException ("Unknown Asymmetric Algorithm " + aa.ToString ());
}
private ASN1 KeyBagSafeBag (AsymmetricAlgorithm aa, IDictionary attributes)
{
PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo ();
if (aa is RSA) {
pki.Algorithm = "1.2.840.113549.1.1.1";
pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((RSA)aa);
}
else if (aa is DSA) {
pki.Algorithm = null;
pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((DSA)aa);
}
else
throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
ASN1 safeBag = new ASN1 (0x30);
safeBag.Add (ASN1Convert.FromOid (keyBag));
ASN1 bagValue = new ASN1 (0xA0);
bagValue.Add (new ASN1 (pki.GetBytes ()));
safeBag.Add (bagValue);
if (attributes != null) {
ASN1 bagAttributes = new ASN1 (0x31);
IDictionaryEnumerator de = attributes.GetEnumerator ();
while (de.MoveNext ()) {
string oid = (string)de.Key;
switch (oid) {
case PKCS9.friendlyName:
ArrayList names = (ArrayList)de.Value;
if (names.Count > 0) {
ASN1 pkcs12Attribute = new ASN1 (0x30);
pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
ASN1 attrValues = new ASN1 (0x31);
foreach (byte[] name in names) {
ASN1 attrValue = new ASN1 (0x1e);
attrValue.Value = name;
attrValues.Add (attrValue);
}
pkcs12Attribute.Add (attrValues);
bagAttributes.Add (pkcs12Attribute);
}
break;
case PKCS9.localKeyId:
ArrayList keys = (ArrayList)de.Value;
if (keys.Count > 0) {
ASN1 pkcs12Attribute = new ASN1 (0x30);
pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
ASN1 attrValues = new ASN1 (0x31);
foreach (byte[] key in keys) {
ASN1 attrValue = new ASN1 (0x04);
attrValue.Value = key;
attrValues.Add (attrValue);
}
pkcs12Attribute.Add (attrValues);
bagAttributes.Add (pkcs12Attribute);
}
break;
default:
break;
}
}
if (bagAttributes.Count > 0) {
safeBag.Add (bagAttributes);
}
}
return safeBag;
}
public virtual byte[] Sign (AsymmetricAlgorithm aa)
{
if (aa is RSA)
return Sign (aa as RSA);
else if (aa is DSA)
return Sign (aa as DSA);
else
throw new NotSupportedException ("Unknown Asymmetric Algorithm " + aa.ToString());
}
