2014年3月30日 · .pem, .cer and .der are all file extensions for files that may contain a X.509 v3 certificate. The .der extension DER is the method of encoding the data that makes up the certificate. DER itself could represent any kind of data, but usually it describes an encoded certificate or a CMS container. CMS is described in PKCS#7 (often stored as .p7) and stands for Cryptographic Message Syntax, which ...

2017年1月19日 · I am using Windows and have been given a .cer file. How can I view the details of it?

2022年11月24日 · I have a .cer certificate, .key file and I would like to convert it to the .pem format. How do I convert them to .pem?

2010年2月18日 · What is the difference between a cer, pvk, and pfx file? Also, which files do I keep and which am I expected to give to my counter-parties?

2011年4月1日 · To convert a .cer file to .pem, open a terminal and run the following command: openssl x509 -inform der -in certificate.cer -outform pem -out certificate.pem Replace "certificate.cer" with the name of the source certificate file you want to convert, and "certificate.pem" with the name you want for the converted certificate.

Actually, the .cer and .pem extensions are quite confusing for me. From the command output provided, I think your cas.cer should be bas64 encoded, which is the format accepted by OpenSSL without any additional parameter. So, you may try to copy the cas.cer to cas.pem (no conversion is needed, just change the filename).

A .cer file only has the public key (this is what you typically exchange with integration partners); it can be used to verify tokens or client authentication requests, and it is what is received by an HTTP client from a server in the SSL handshake.

2017年11月20日 · I have .cer certificate which is not readable using text editor. I need to convert it to .pem and .crt in order to upgrade files on the server. As I can see .crt file begins with -----BEGIN CERTIF...

2020年1月28日 · Is there a difference between .cer and .crt. I know they both are same SSL certificate format, but don't know what is the difference between them. If there no difference, why 2 different extensions?

2022年9月5日 · The following command is used to sign a string via openssl: smime -sign -signer cert.crt -inkey key.key -engine gost -binary -noattr Given a .cer file that was said to contain key within self how ...