public byte[] Decrypt(byte[] data, string privateKey)
{
using (var reader = new StringReader(privateKey))
{
// https://stackoverflow.com/a/60423034
var pemReader = new Org.BouncyCastle.Utilities.IO.Pem.PemReader(reader);
var pem = pemReader.ReadPemObject();
AsymmetricKeyParameter pk = PrivateKeyFactory.CreateKey(pem.Content);
var cipher1 = new Pkcs1Encoding(new RsaEngine());
cipher1.Init(false, (ICipherParameters)pk);
var decipheredData = cipher1.ProcessBlock(data, 0, data.Length);
return(decipheredData);
}
}
public byte[] GenerateSignature(byte[] data, string privateKey)
{
using (var reader = new StringReader(privateKey))
{
// https://stackoverflow.com/a/60423034
var pemReader = new Org.BouncyCastle.Utilities.IO.Pem.PemReader(reader);
var pem = pemReader.ReadPemObject();
AsymmetricKeyParameter pk = PrivateKeyFactory.CreateKey(pem.Content);
var signer = SignerUtilities.GetSigner("SHA256WITHRSA");
signer.Init(true, pk);
signer.BlockUpdate(data, 0, data.Length);
var signature = signer.GenerateSignature();
return(signature);
}
}
public static CertificateInfo GetCertificateInfo(byte[] certificate, TCertificateFormat certificateFormat)
{
CertificateInfo result = null;
X509CertificateStructure cert = null;
switch (certificateFormat)
{
case TCertificateFormat.NotSet:
break;
case TCertificateFormat.PEM:
Org.BouncyCastle.Utilities.IO.Pem.PemReader reader = new Org.BouncyCastle.Utilities.IO.Pem.PemReader(new StreamReader(new MemoryStream(certificate)));
Org.BouncyCastle.Utilities.IO.Pem.PemObject pem = reader.ReadPemObject();
while (pem != null)
{
if (pem.Type.EndsWith("CERTIFICATE"))
{
cert = X509CertificateStructure.GetInstance(pem.Content);
}
else if (pem.Type.EndsWith("PRIVATE KEY"))
{
if (result == null)
{
result = new CertificateInfo();
}
result.PrivateKey = GetPrivateKeyFromPEM(pem);
}
pem = reader.ReadPemObject();
}
break;
case TCertificateFormat.PFX:
break;
case TCertificateFormat.CER:
cert = X509CertificateStructure.GetInstance(certificate);
break;
default:
break;
}
if (cert != null)
{
if (result == null)
{
result = new CertificateInfo();
}
result.Subject = new CertificateSubject(cert);
X509Certificate certX509 = new X509Certificate(cert);
Asn1OctetString subjectKeyID = certX509.GetExtensionValue(X509Extensions.SubjectKeyIdentifier);
if (subjectKeyID != null)
{
byte[] encodeKeyID = subjectKeyID.GetOctets();
byte[] keyID = new byte[encodeKeyID[1]];
Buffer.BlockCopy(encodeKeyID, 2, keyID, 0, encodeKeyID[1]);
result.SubjectKeyID = keyID;
}
}
return(result);
}
public static CertificateInfo GetCertificateInfo(byte[] certificate, TCertificateFormat certificateFormat)
{
CertificateInfo result = null;
X509CertificateStructure cert = null;
switch (certificateFormat)
{
case TCertificateFormat.NotSet:
break;
case TCertificateFormat.PEM:
Org.BouncyCastle.Utilities.IO.Pem.PemReader reader = new Org.BouncyCastle.Utilities.IO.Pem.PemReader(new StreamReader(new MemoryStream(certificate)));
Org.BouncyCastle.Utilities.IO.Pem.PemObject pem = reader.ReadPemObject();
while (pem != null)
{
if (pem.Type.EndsWith("CERTIFICATE"))
{
cert = X509CertificateStructure.GetInstance(pem.Content);
}
else if (pem.Type.EndsWith("PRIVATE KEY"))
{
if (result == null)
result = new CertificateInfo();
result.PrivateKey = GetPrivateKeyFromPEM(pem);
}
pem = reader.ReadPemObject();
}
break;
case TCertificateFormat.PFX:
break;
case TCertificateFormat.CER:
cert = X509CertificateStructure.GetInstance(certificate);
break;
default:
break;
}
if (cert != null)
{
if (result == null)
result = new CertificateInfo();
result.Subject = new CertificateSubject(cert);
X509Certificate certX509 = new X509Certificate(cert);
Asn1OctetString subjectKeyID = certX509.GetExtensionValue(X509Extensions.SubjectKeyIdentifier);
if (subjectKeyID != null)
{
byte[] encodeKeyID = subjectKeyID.GetOctets();
byte[] keyID = new byte[encodeKeyID[1]];
Buffer.BlockCopy(encodeKeyID, 2, keyID, 0, encodeKeyID[1]);
result.SubjectKeyID = keyID;
}
}
return result;
}
