title: Load RSA keys from files
body: <p>I used openSSL command to create 2 files: 1 for RSA public key &amp; 1 for RSA private key. How do I recover RSA keys using C?</p>
  
  <p>Specifically, I have these functions:</p>
  
  <pre><code>RSA_public_encrypt(read_num, in_buf, out_buf, public_key, RSA_PKCS1_PADDING);
  RSA_private_decrypt(read_num, in_buf, out_buf, private_key, RSA_PKCS1_PADDING);
  </code></pre>
  
  <p>The 4th arguments, public_key and private_key, need to be in RSA type. But what I have are only 2 text files generated by openSSL command:</p>
  
  <pre><code>File 1: 
  -----BEGIN RSA PRIVATE KEY-----
  MIICXAIBAAKBgQDP78B9GZ9ZFG6OnZ1PU+9BPoyLRuYJr3rSX470XjbJhmlq9DTn
  NvG1pxWxrd5tjlmMWD4AkHqD7E87AafvQEiABdUXwf30LatT1w6tlyQWkM/HCN5k
  ....
  npF+nDtKmGteLJVp5x7HHMnZaRbvcV2oUtgdmIMbqVYgbPkwO2tUfUPA6zg1fzhy
  nNzQ35e/Hi0fgSHZib0CQEe4e4txXzkezomkWqwuGL8Qqp8iCbBn44mzxXTBvAQl
  muFu93C/ULMzRoq4cpPgl3sS0F9s7+zR18SERerFvfc=
  -----END RSA PRIVATE KEY-----
  
  File 2:
  -----BEGIN PUBLIC KEY-----
  MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDP78B9GZ9ZFG6OnZ1PU+9BPoyL
  RuYJr3rSX470XjbJhmlq9DTnNvG1pxWxrd5tjlmMWD4AkHqD7E87AafvQEiABdUX
  wf30LatT1w6tlyQWkM/HCN5kmK5WzPUYbI1q5xGy7Eox9sJ6cNwMUOT+MSDhErgB
  gkgF6uG1yGrxuEVk/QIDAQAB
  -----END PUBLIC KEY-----
  </code></pre>
  
  <p>Now, I read these 2 files to a char[] array. What I have to do next is convert these 2 arrays to 2 RSA keys (public key at client &amp; private_key at server) so that I can use RSA_public_encrypt and RSA_private_decrypt functions.</p>
  
  <p>Thanks. </p>