mellon_create_metadata fails silently to create xml file

[RainerT]

The script mellon_create_metadata fails to create the xml file without warning:

# mellon_create_metadata https://example.net/saml/metadata https://example.net/saml
Output files:
Private key: https_example.net_saml_metadata.key
Certificate: https_example.net_saml_metadata.cert
Metadata: https_example.net_saml_metadata.xml

Host: example.net

Endpoints:
SingleLogoutService: https://example.net/saml/logout
AssertionConsumerService: https://example.net/saml/postResponse

# ls -la
insgesamt 16
drwxr-xr-x 2 root root 4096 Feb 9 12:17 .
drwx------ 10 root root 4096 Feb 9 12:17 ..
-rw------- 1 root root 1359 Feb 9 12:15 https_example.net_saml_metadata.cert
-rw------- 1 root root 2484 Feb 9 12:15 https_example.net_saml_metadata.key

# lsb_release -rd
Description: Ubuntu 22.04.3 LTS

# apt-cache policy libapache2-mod-auth-mellon
libapache2-mod-auth-mellon:
  Installiert: 0.18.0-1build1
  Installationskandidat: 0.18.0-1build1
  Versionstabelle:
 *** 0.18.0-1build1 500
        500 http://de.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
        100 /var/lib/dpkg/status

3)
It should create the file https_example.net_saml_metadata.xml

4) fails to create without warning

It fails because it uses openssl with /dev/urandom and tries to write to it. The script is
"set -e" and openssl writes error.out to /dev/null.
If openssl writes his error to stdout you see:

Cannot write random bytes:
4047B000347F0000:error:1200007A:random number generator:RAND_write_file:Not a regular file:../crypto/rand/randfile.c:190:Filename=/dev/urandom

It is the same problem as this bug:
https://bugs.launchpad.net/ubuntu/+source/ssl-cert/+bug/1945774

[Paride Legovini (paride)]

This looks like a duplicate of LP: #1945774 (as also noted in the bug description), I'm marking it as such. That bug has open (New) Jammy tasks.