Hi Vitaly, On Mon, 2021-07-12 at 08:44 +0300, Vitaly Chikunov wrote: > > @@ -43,26 +43,43 @@ cat > test-ca.conf <<- EOF > basicConstraints=CA:TRUE > subjectKeyIdentifier=hash > authorityKeyIdentifier=keyid:always,issuer > + > + [ skid ] > + basicConstraints=CA:TRUE > + subjectKeyIdentifier=12345678 > + authorityKeyIdentifier=keyid:always,issuer > EOF > fi On my system: $ openssl version OpenSSL 1.1.1g FIPS 21 Apr 2020 Not sure this has anything to do with the reason that "skid" is not supported. The resulting files are empty. ls -lat *skid* -rw-rw-r--. 1 mimi mimi 0 Jul 14 12:02 test-rsa1024_skid.key -rw-rw-r--. 1 mimi mimi 0 Jul 14 12:02 test-rsa1024_skid.pub - openssl pkey -in test-rsa1024.key -out test-rsa1024.pub -pubout - openssl req -verbose -new -nodes -utf8 -sha1 -days 10000 -batch -x509 -extensions skid -config test-ca.conf -newkey rsa:1024 -out test- rsa1024_skid.cer -outform DER -keyout test-rsa1024_skid.key Using configuration from test-ca.conf Error Loading extension section skid <=== Then the rest of the tests fail. Probably should check not only if the file exists, but the size of the file as well. - openssl pkey -in test-rsa1024_skid.key -out test-rsa1024_skid.pub -pubout Can't open test-rsa1024_skid.key for reading, No such file or directory 140493815547712:error:02001002:system library:fopen:No such file or directory:crypto/bio/bss_file.c:69:fopen('test-rsa1024_skid.key','r') 140493815547712:error:2006D080:BIO routines:BIO_new_file:no such file:crypto/bio/bss_file.c:76: unable to load key - openssl x509 -inform DER -in test-rsa1024_skid.cer Can't open test-rsa1024_skid.cer for reading, No such file or directory 139636313208640:error:02001002:system library:fopen:No such file or directory:crypto/bio/bss_file.c:69:fopen('test-rsa1024_skid.cer','rb') 139636313208640:error:2006D080:BIO routines:BIO_new_file:no such file:crypto/bio/bss_file.c:76: unable to load certificate Mimi