[libssh2] #248: A small patch to handle private key in memory

#248: A small patch to handle private key in memory
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 Reporter: intron | Owner:
     Type: enhancement | Status: new
 Priority: normal | Milestone: 1.4.3
Component: API | Version: 1.4.2
 Keywords: | Blocked By:
   Blocks: |
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 Here is my small patch to handle private key in memory:
     http://ftp.intron.ac/tmp/openssl.c.diff
 This feature is useful to work with a private key stored in a
 USB key. I wish that this patch was useful to this project.

 With this patch, if the argument "privatekey" of
 libssh2_userauth_publickey_fromfile_ex() points to a string
 starting with "mem://", the contents in the string after "mem://"
 will be interpreted as a private key. Otherwise, the full contents
 of "privatekey" is interpreted as a filename of private key.

 Example:

   char usbkeybuf[4096], pvk[4096];

   /* Read a private key from USB key to usbkeybuf[] */
   ...

   strcpy(pvk, "mem://");
   strcat(pvk, usbkeybuf);

   /*
      pvk now contains
        "mem://-----BEGIN RSA PRIVATE KEY-----\n"
           ...
        "-----END RSA PRIVATE KEY-----"
    */

   nret = libssh2_userauth_publickey_fromfile(session,
       username, NULL, pvk, NULL);

-- 
Ticket URL: <https://trac.libssh2.org/ticket/248>
libssh2 <https://trac.libssh2.org/>
C library for writing portable SSH2 clients
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