certificate authority - OpenSSL error while loading

Nov 06, 2017 Displaying a remote SSL certificate details using CLI Print certificate serial number. This script doesn't have a special option to parse out the serial number, so will use the generic --option flag to pass '-serial' through to openssl. ssl-cert-info --host gmail.com --option -serial serial=4BF004B4DDC9C2F8 x.509 - Where is the version number in an x509 version 1 I found the version field in the v3 cert, but I have two v1 certs (one from my organization, one I generated via OpenSSL) and in both of these the first non-sequence field is the serial number integer: > openssl asn1parse -in ca.der -inform DER 0:d=0 hl=4 l= 645 cons: SEQUENCE 4:d=1 hl=4 l= 494 cons: SEQUENCE 8:d=2 hl=2 l= 9 prim: INTEGER How to check the certificate revocation status - SSL Sep 24, 2019

In the configure file of OpenSSL “openssl.conf” (Figure 2), the term “serial” is related to the serial number. If the file “serial” in the current directory exists, the serial number can be set up in the file; that is to say, we can designate a number as the serial number in the file.

How To Generate Random Numbers and Password with OpenSSL One note on the OpenSSL base64 command: the number you enter is the number of random bytes that OpenSSL will generate, *before* base64 encoding. Base64 then then produces four bytes of output for every three bytes of input – meaning that the number on the command line should be 3/4 of the desired password length.

The CABForum guideline for a public CA is for the serial number to be a random number at least 8 octets long and no longer than 20 bytes. By default, openssl makes self-signed certificates with 8 octet serial numbers. This guide uses openssl's RAND function to generate the random value and pipe it into the -set_serial option.

Jun 15, 2017 3.1.1 X509 objects - Python interface to the OpenSSL library get_serial_number() Return the certificate serial number. get_subject() Return an X509Name object representing the subject of the certificate. digest_name must be a string describing a digest algorithm supported by OpenSSL (by EVP_get_digestbyname, specifically). For example, "md5" or "sha1". add_extensions(extensions)