On Mon, Jan 05, 2015 at 11:04:19PM -0600, jack seth wrote: > Thanks for the response. First I am running this on Windows 7. Questions > > 1. How can I determine what key format my ca.key is in? openssl asn1parse -in ca.key (don't post the output). plus some knowledge of the various ASN.1 encodings (PKCS#8, ...). See the pkey(1) and rsa(1) manpages from OpenSSL 1.0.0 or later. > 2. You say there are multiple key formats for the same key, but > for my peace of mind I would like to get the same key format that > originally had. How can I do this? Copy the original file. :-) > > There are multiple possible key formats for the same key. Instead > > compare the outputs of: > > > > $ umask 077 > > $ openssl rsa -in ca.key -noout -text > txt1 > > $ openssl rsa -in catest.key -noout -text > txt2 > > $ diff txt1 txt2 This really is sufficient to do the comparison. You can adapt to Windows without too much effort. -- Viktor.