What I’m trying to do: Now I want to add an extension to this Certificate. Specifically, I want to set the Extended Key Usage extension to the value serverAuth,clientAuth.To do this, I am attempting to use the OpenSSL function x509_add1_ext_i2d(), which has the following signature:. X509_add1_ext_i2d(X509 *x, int nid, void *value, int crit, unsigned long flags), X509_ add_ext just calls X509v3_add_ext on the extension subfield of x, passing the other arguments through unchanged. The following functions all manipulate keys associated with an X509 certificate. See X.509 Certificate Subfields Handling for more details on the functions they call. The following macro is provided for the convenience of the user:, I found some examples of adding certificate extensions in Google search, as follows. std::string san_dns = DNS:www.mysite.com X509_EXTENSION *cert_ex = X509V3_EXT_conf_nid (NULL, NULL, NID_subject_alt_name, san_dns.data ()) X509_ add_ext (cert, cert_ex, -1) This works, but I think this is not a standard API, this is a low-level API.
Programmatically. Have a look at the demos/x509/mkreq.c file that comes with OpenSSL. It creates a request and adds an email address as an alternative name. Stripped down it does the following: exts = sk_X509_EXTENSION_new_null () add_ext (exts, NID_subject_alt_name, email:steve@openssl.org) X509_REQ_add_extensions (x, exts) sk_X509 …
Implementation of an X.509 certificate as specified in RFC 5280. Provides access to a certificate’s attributes and allows certificates to be read from a string, but.
class OpenSSL::X509::Certificate Implementation of an X.509 certificate as specified in RFC 5280. Provides access to a certificate’s attributes and allows certificates to be read from a string, but also supports the creation of new certificates from scratch.
I am adding a custom extension to an x509 a png icon basically (bytes). Since the png icon is too large to post the data I have subsituted it with a file called sample.txt that has a text line This is a sample. The code excerpt to add the extension is below.
Get the information and services for the issuer from the certificate’s authority information access extension exteension, as described in RFC5280 Section 4.2.2.1.
You can’t put the name in the actual CSR (or cert or CRL) extension. The extension uses the OID, that’s how extensions work. You need the program that parses and display to map OID to name the same way your creator program did. If you are using commandline ‘req’ that, like all commandlines now but not before 1.0.0 IIRC, uses the ‘modules’ part of the config file which includes oid_section.
