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POEncrypting Data using RSA Public and Private Key in C#
 

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  1. POEncrypting Data using RSA Public and Private Key in C#
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    <p>I am trying to encrypt a message using RSA public key and decrypt it using my private key. It encrypted the message, but I was not able to decrypt it. The message was still encrypt after the final process. When I exported the private key, it also included the public keys. I tried to remove the public key leaving, but it would not work. Here are the private and public keys</p> <pre><code>//This is the public key private const string public_key = "&lt;RSAKeyValue&gt;&lt;Modulus&gt;uznzVPilsR1rWPkpq6m6IALaafDnVZTDDcnEyBD3A/PBx2JZTKM0DTgiTDDwCEmQBNBpPILcIBdtg3aSUgicair+2ksYrVFT+uiy0Zy1nU6qoJ+SsapLKrpCa1zHpV4LMO/pFo4Foqzw0C1FNe56FXo1xj77GPgeYl0MHUVtAUc=&lt;/Modulus&gt;&lt;Exponent&gt;AQAB&lt;/Exponent&gt;&lt;/RSAKeyValue&gt;"; //This is the private and public key. private const String private_key = "&lt;RSAKeyValue&gt;&lt;Modulus&gt;uznzVPilsR1rWPkpq6m6IALaafDnVZTDDcnEyBD3A/PBx2JZTKM0DTgiTDDwCEmQBNBpPILcIBdtg3aSUgicair+2ksYrVFT+uiy0Zy1nU6qoJ+SsapLKrpCa1zHpV4LMO/pFo4Foqzw0C1FNe56FXo1xj77GPgeYl0MHUVtAUc=&lt;/Modulus&gt;&lt;Exponent&gt;AQAB&lt;/Exponent&gt;&lt;P&gt;+jPKs9JxpCSzNY+YNanz49Eo/A6RaU1DZWoFm/bawffZOompeL1jzpUlJUIrKVZJkNFvlxE90uXVwjxWBLv9BD==&lt;/P&gt;&lt;Q&gt;v5CVWKZ5Wo7W0QyoEOQS/OD8tkKS9DjzZnbnuo6lhcMaxsBrCWLstac1Xm2oFNtZgLtrPGbPfCNC5Su4Rz/P5w==&lt;/Q&gt;&lt;DP&gt;ZnyikmgobqEt20m3gnvcUDxT+nOJMsYYTklQhONoFj4M+EJ9bdy+Lle/gHSLM4KJ3c08VXgVh/bnSYnnfkb20Q==&lt;/DP&gt;&lt;DQ&gt;sSYGRfWk0W64Dpfyr7QKLxnr+Kv186zawU2CG44gWWNEVrnIAeUeWxnmi41CWw9BZH9sum2kv/pnuT/F6PWEzw==&lt;/DQ&gt;&lt;InverseQ&gt;XpWZQKXa1IXhF4FX3XRXVZGnIQP8YJFJlSiYx6YcdZF24Hg3+Et6CZ2/rowMFYVy+o999Y5HDC+4Qa1yWvW1vA==&lt;/InverseQ&gt;&lt;D&gt;Kkfb+8RrJqROKbma/3lE3xXNNQ7CL0F5CxQVrGcN8DxL9orvVdyjlJiopiwnCLgUHgIywceLjnO854Q/Zucq6ysm2ZRq36dpGLOao9eg+Qe8pYYO70oOkEe1HJCtP1Laq+f3YK7vCq7GkgvKAI9uzOd1vjQv7tIwTIADK19ObgE=&lt;/D&gt;&lt;/RSAKeyValue&gt;"; //Encrypting the text using the public key private RSACryptoServiceProvider cipher = null; cipher = new RSACryptoServiceProvider(); cipher.FromXmlString(public_key); byte[] data = Encoding.UTF8.GetBytes(txtUnencrypt.Text); byte[] cipherText = cipher.Encrypt(data, false); lblUnencryptMessage.Text = Convert.ToBase64String(cipherText); // decryptText(); //Trying to decrypt the text using the private key cipher = new RSACryptoServiceProvider(); cipher.FromXmlString(private_key); byte[] ciphterText = Convert.FromBase64String(lblUnencryptMessage.Text); byte[] plainText = cipher.Decrypt(ciphterText, false); lblDecript.Text = Convert.ToBase64String(plainText); </code></pre> <p>What am I missing here? </p> <p><strong>Updated at 11:37 AM</strong></p> <p>For example, I encrypted the word "Testing", the encrypted text was kkqs+UGHNI7/3cKhQvSnJrKzNeCBQX9xHX2VrlyMvnwtszJAoFuViBZlfwmpVhqddnVUrlaqqkD7971E8L3wWltfGetK9nIljeo0GeietLYljoY0Gy3gatU++JPrqajAKxpIB75tvVlKXuYIs0qE3XWZu9bj0zAa4BVT2MhVNQM="</p> <p>The decrypted text was dGVzdGluZw==</p>
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    1. USJosiane Ferice
    1. USJosiane Ferice
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    1. COWhen I try to run your code it throws an exception. What happens when you run it?
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      1. POEncrypting Data using RSA Public and Private Key in C#
      1. USJames K Polk
    2. CO@GregS, It did not give me an exception, it simply did not decrypt the text. I updated the original text to include an example.
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      1. USJosiane Ferice
 

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