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POReproducing Ruby OpenSSL private_encrypt output in C#
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  1. POReproducing Ruby OpenSSL private_encrypt output in C#
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    copied!<p>I have a simple Ruby script that I am using to do a private_encrypt on some HTTP headers to sign a web request that is to be sent to a ruby REST API, the API tests the Base64 encoded string against a Base64 encoded string it generates rather than decoding the Base64 and decrypting the data then testing the original string. </p> <p>The script I am using is </p> <pre><code>require "openssl" require "base64" path_to_cert = ARGV[0].dup plain_text = Base64.decode64(ARGV[1].dup) private_key = OpenSSL::PKey::RSA.new(File.read(path_to_cert)) puts Base64.encode64(private_key.private_encrypt(plain_text)) </code></pre> <p>The fact that the input is Base64 encoded is purely due to linebreaks and spaces in the input argument.</p> <p>To use this I am having to shell out to ruby using System.Diagnostics.Process and capture the StdOut, while this isn't a major problem and works I'd like to remove the dependency on ruby but I am unable to reproduce the output using the C# RsaCryptoServiceProvider.</p> <p>If I Base64 Encode the private_encrypt result of "SimpleString" using ruby i consistently get </p> <blockquote> <p>auReJzoPSW3AhzsfT3EH4rD7lc4y2CJ026xIOiV6kjl2OKIj8GnzrPosoJDg\nSHrvLVKrSxYlegYgJRMx+vaAHSAm7RXrZh5An2SnVuO3qITa2TJ78hTc3bAw\nCDm4i9/4qictjxEFfnPRe6 EYCa4b3dnM5moa1eo9zbQPBa1eS6ItRCX4C0G0\n1tJpQsEvuums363eAhTUAYa6yEWuINLPmE0USW6jfFNnsxw8Nv9SnC+ziomb\n/mwlt9dS5/mzKM8yFMH6hdQYLoqc0QpjT+xaZ1ZyJ6dG5MVG h3JtjIVRTOSd\n+pUU/bo+obEHbrftG8u2uJImLSA+/1e8aapHaa3WNg==</p> </blockquote> <p>When using the .Net</p> <pre><code>RsaCryptoServiceProvider.Encrypt("SimpleString", false) </code></pre> <p>The result is always a different output due to the fact it is encrypting with the public key.</p> <p>I have also tried </p> <pre><code>RsaCryptoServiceProvider.SignData </code></pre> <p>and while this always yields the same result, it is different to the result from ruby.</p> <p>Can I use some CryptoAPI directly from .Net that will allow me to achieve the same result as Ruby?</p>
 

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