Converting RSA PEM key (PKCS#1) to XML compatible for .Net
- Tested with python version 3.6.8 Anaconda
- Uses pycrypto
For windows you may find binaries here: http://www.voidspace.org.uk/python/modules.shtml#pycrypto
- PHP encrypt/decrypt using PEM keys, C# decrypt using converted PEM to XML keys
- C# encrypt/decrypt using using XML keys, PHP decrypt using converted XML to PEM keys
Convert a public key from PEM to XML: python PemToXml.py -ptox -pub "path/to/public.pem"
Convert a public key from XML to PEM: python PemToXml.py -xtop -pub "path/to/public.xml"
Convert a private key from PEM to XML: python PemToXml.py -ptox -priv "path/to/private.pem"
Convert a private key from XML to PEM: python PemToXml.py -xtop -priv "path/to/private.xml"
("-pub", "--public") => help="Public Key"
("-priv", "--private") => help="Private Key"
("-xtop", "--xmltopem") => help="XML to PEM"
("-ptox", "--pemtoxml") => help="PEM to XML"using System;
using System.Text;
using System.Security.Cryptography;private static readonly string privateKeyXml = "...your XML here...";
private static readonly string publicKeyXml = "...your XML here...";
// see https://msdn.microsoft.com/en-us/library/system.security.cryptography.rsacryptoserviceprovider.aspx
// let exception be thrown if error
public static string Encrypt(string data)
{
if (string.IsNullOrEmpty(data))
{
return null;
}
byte[] dataToEncrypt = Encoding.UTF8.GetBytes(data);
byte[] encryptedData;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlString(publicKeyXml);
encryptedData = rsa.Encrypt(dataToEncrypt, false);
}
return Convert.ToBase64String(encryptedData);
}
// let exception be thrown if error
public static string Decrypt(string data)
{
if (string.IsNullOrEmpty(data))
{
return null;
}
byte[] dataToDencrypt = Convert.FromBase64String(data);
byte[] decryptedData;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlString(privateKeyXml);
decryptedData = rsa.Decrypt(dataToDencrypt, false);
}
return Encoding.UTF8.GetString(decryptedData);
}
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