On Sat, Mar 01, 2014 at 01:02:28AM -0500, Jeffrey Walton wrote:
> X509_EXTENSION* ex4 =
> X509V3_EXT_conf_nid(NULL, NULL, NID_subject_key_identifier, "hash");
> err = ERR_get_error();
> ...
>
> $ openssl errstr 0x22073072
> error:22073072:X509 V3 routines:S2I_SKEY_ID:no public key
Too many NULL arguments, the certificate context is missing. At
a minimum, you need:
X509V3_CTX v3ctx;
X509 *issuer = ...;
X509 *subject = ...;
X509V3_set_ctx(&v3ctx, issuer, subject, 0, 0, 0);
X509V3_EXT_conf_nid(0, &v3ctx, nid, val));
some extensions require additional context via the (first)
configuration hash argument, but the above is sufficient to compute
a subject key id, in which case the issuer can be 0, but the subject
may not. Other extensions may need the issuer cert too.
--
Viktor.
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