24 Mar
2021
24 Mar
'21
8:07 a.m.
Both as client and as server work after command `c_rehash .` is executed in ca_path
directory. It creates two (why two?) links to each ca certificate file, for example:
```
$ ls -ls
total 16
0 lrwxrwxrwx 1 jh jh 18 Mar 24 07:58 12d55845.0 -> dst_root_ca_x3.pem
0 lrwxrwxrwx 1 jh jh 18 Mar 24 07:58 2e5ac55d.0 -> dst_root_ca_x3.pem
0 lrwxrwxrwx 1 jh jh 32 Mar 24 07:58 4a0a35c0.0 -> lets-encrypt-x3-cross-signed.pem
0 lrwxrwxrwx 1 jh jh 32 Mar 24 07:58 4f06f81d.0 -> lets-encrypt-x3-cross-signed.pem
0 lrwxrwxrwx 1 jh jh 14 Mar 24 07:58 590d426f.0 -> class3_X0E.crt
0 lrwxrwxrwx 1 jh jh 12 Mar 24 07:58 5ed36f99.0 -> root_X0F.crt
0 lrwxrwxrwx 1 jh jh 12 Mar 24 07:58 99d0fa06.0 -> root_X0F.crt
4 -rw-r--r-- 1 jh jh 2427 Mar 23 16:40 class3_X0E.crt
4 -rw-r--r-- 1 jh jh 1200 Mar 23 16:40 dst_root_ca_x3.pem
0 lrwxrwxrwx 1 jh jh 14 Mar 24 07:58 e5662767.0 -> class3_X0E.crt
4 -rw-r--r-- 1 jh jh 1647 Mar 23 16:40 lets-encrypt-x3-cross-signed.pem
4 -rw-r--r-- 1 jh jh 2464 Mar 23 16:40 root_X0F.crt
```
Text on page
[https://www.openssl.org/docs/man1.0.2/man3/SSL_CTX_load_verify_locations.ht… is
not very clear about the links:
`
If CApath is not NULL, it points to a directory containing CA certificates in PEM format.
The files each contain one CA certificate. The files are looked up by the CA subject name
hash value, which must hence be available. If more than one CA certificate with the same
name hash value exist, the extension must be different (e.g. 9d66eef0.0, 9d66eef0.1 etc).
The search is performed in the ordering of the extension number, regardless of other
properties of the certificates. Use the c_rehash utility to create the necessary links.
`
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