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POPython and C# Cryptography: What i'm doing wrong?
 

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  1. POPython and C# Cryptography: What i'm doing wrong?
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    <p><strong>I need to encrypt text in python and decrypt in C #. In python, I have this code:</strong></p> <p>I have this code in Python:</p> <pre><code>def genKey(): rsa = RSA.gen_key(2048, 65537) rsa.save_key('c:/temp/priv-key.pem', callback=passwordCallback) rsa.save_pub_key('c:/temp/pub-key.pem') def encrypt(): varkey = readkey('c:/temp/pub-key.pem') bio = BIO.MemoryBuffer(varkey) rsa = RSA.load_pub_key_bio(bio) encrypted = rsa.public_encrypt('My Text Here.', RSA.pkcs1_oaep_padding) f = open("c:/temp/cript.txt", "w") f.write(encrypted) f.close() </code></pre> <p>This code uses M2Crypto.</p> <p><strong>Like I said, I want to decrypt the result generated up in C #. Below is my code:</strong></p> <pre><code>static void Main(string[] args) { string text = GetText(); System.Text.ASCIIEncoding encoding=new System.Text.ASCIIEncoding(); Byte[] payload = encoding.GetBytes(text); byte[] b = System.IO.File.ReadAllBytes(@"C:\temp\priv-key.pem"); System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding(); OpenSSL.Core.BIO bio = new OpenSSL.Core.BIO(b); OpenSSL.Crypto.CryptoKey key = OpenSSL.Crypto.CryptoKey.FromPrivateKey(bio, "mypassword"); RSA rsa = key.GetRSA(); byte[] result = rsa.PrivateDecrypt(payload, RSA.Padding.OAEP); } </code></pre> <p><strong>The problem is this line:</strong></p> <pre><code>byte[] result = rsa.PrivateDecrypt(payload, RSA.Padding.OAEP); </code></pre> <p>When it is executed, this error occurs:</p> <pre><code>error:0407A079:rsa routines:RSA_padding_check_PKCS1_OAEP:oaep decoding error error:04065072:rsa routines:RSA_EAY_PRIVATE_DECRYPT:padding check failed </code></pre> <p>The gurus of Cryptography and C# can help me?</p>
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    1. COCan you post up what you have so far in C#?
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    2. COCheck out the [`RSA`](http://msdn.microsoft.com/en-us/library/system.security.cryptography.rsa.aspx) class.
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    3. CO@EudisDuran Code reference updated above. Thanks.
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