rsa_enc_dec.cs

Example of direct RSA encryption and decryption.

See Note on examples.

using System;
using System.IO;
using Dinamo.Hsm;
 
namespace RSAEncDec
{
    class Program
    {
        static void Main(string[] args)
        {
            string address = "127.0.0.1";
            string user = "master";
            string pass = "12345678";
 
            DinamoClient hsm = new DinamoClient();
 
            /*
                Conecta ao HSM
             */
            hsm.Connect(address, user, pass);
 
            /*
                Gera uma chave de testes
            */
            string keyId = "key_id";
            IntPtr keyHandle = hsm.GenerateKey(keyId,
                                               DinamoClient.KEY_ALG.ALG_RSA_2048,
                                               true);
 
            /*
                Monta buffer de encriptação. Deve ter o tamanho do bloco da
                chave e conter os dados que serão encriptados.
            */
            byte[] data = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
            byte[] buffer = new byte[256];
            data.CopyTo(buffer, 0);
 
            Console.WriteLine("Dados entrada(len {0}): {1}", data.Length,
                              BitConverter.ToString(data));
            /*
                Recupera o handle da chave pública.
            */
            byte[] pubKeyData = hsm.ExportKey(keyHandle, IntPtr.Zero,
                                              DinamoClient.BLOB_TYPE.PUBLICKEY_BLOB);
            string pubKeyId = "rsa2048_pub";
            IntPtr pubKeyHandle =  hsm.ImportKey(pubKeyId, IntPtr.Zero,
                                                 pubKeyData,
                                                 DinamoClient.BLOB_TYPE.PUBLICKEY_BLOB,
                                                 DinamoClient.KEY_ALG.ALG_RSA_2048_PUB);
 
            /*
                Encripta usando padding PKCS#1 v1.5 tipo 2
            */
            int outDataLen = data.Length;
            Console.WriteLine("OutDataLen: {0}", outDataLen);
            hsm.Encrypt(pubKeyHandle, IntPtr.Zero, true, 0, null,
                        DinamoClient.MODE_TYPE.MODE_NONE,
                        DinamoClient.PADDING_TYPE.PKCS1_PADDING, buffer,
                        ref outDataLen, buffer.Length);
 
            Console.WriteLine("Dados encriptados (len {0}): {1}", outDataLen,
                            BitConverter.ToString(buffer));
 
            /*
                Decripta usaando padding PKCS#1 v1.5 tipo 2
            */
            outDataLen = buffer.Length;
            hsm.Decrypt(keyHandle, IntPtr.Zero, true, 0, null,
                        DinamoClient.MODE_TYPE.MODE_NONE,
                        DinamoClient.PADDING_TYPE.PKCS1_PADDING, buffer,
                        ref outDataLen);
            Console.WriteLine("Dados decriptados (len {0}): {1}", outDataLen,
                            BitConverter.ToString(buffer));
 
            /*
                Libera handle, remove chave e desconecta
            */
            hsm.DestroyKey(keyHandle);
            hsm.RemoveObject(keyId);
            hsm.Disconnect();
        }
    }
}