On Wed, Apr 07, 2021 at 10:14:42AM +0800, Nan Xiao wrote: > Greetings from me! By default openssl-x509 can only dump one > certificate from the file:
By "a file" you clearly mean a "PEM file" with one or more certificates exclosed in "-----BEGIN ...".."-----END ..." delimiters. With that proviso, the command in question is: openssl crl2pkcs7 -nocrl -certfile somefile.pem | opessl pkcs7 -print_certs -text The output format can be tweaked slightly, though not quite as much as will "openssl x509". See the pkcs7(1) manpage for details. -- Viktor.